阅读说明：本技术 半导体装置 (Semiconductor device ) 是由 姜秀彬 李秉一 具池谋 徐裕轸 李晫 于 2019-04-08 设计创作，主要内容包括：本发明提供了一种半导体装置。所述半导体装置包括设置在基底上的堆叠结构。堆叠结构包括多个栅电极。所述半导体装置还包括设置在基底上并穿过堆叠结构的第一结构以及设置在基底上的第二结构。第二结构设置在堆叠结构的外部,面向第一结构并与第一结构间隔开。第一结构包括穿过所述多个栅电极的至少一部分并在堆叠结构的外部延伸的多条分离线,并且第二结构由与第一结构的材料相同的材料形成。(The present invention provides a kind of semiconductor devices.The semiconductor device includes the stacked structure being arranged in substrate.Stacked structure includes multiple gate electrodes.The semiconductor device further includes the second structure for being arranged in substrate and passing through the first structure of stacked structure and being arranged in substrate.Second structure setting is spaced apart in the outside of stacked structure towards first structure and with first structure.First structure includes at least part across the multiple gate electrode and the external a plurality of defiber extended in stacked structure, and the second structure is formed by material identical with the material of first structure.)

1. a kind of semiconductor device, the semiconductor device include:

Stacked structure is arranged in substrate, wherein the stacked structure includes multiple gate electrodes；

First structure, setting is on the substrate, wherein the first structure passes through the stacked structure；And

Second structure, setting is on the substrate, wherein second structure setting in the outside of the stacked structure, towards The first structure is simultaneously spaced apart with the first structure,

Wherein, the first structure includes at least part across the multiple gate electrode and in the outside of the stacked structure The a plurality of defiber extended, and the first structure and second structure are formed from the same material.

2. semiconductor device according to claim 1, wherein each packet in the first structure and second structure Include separating core pattern and the insulating spacer around the side surface of the separating core pattern.

3. semiconductor device according to claim 2, wherein the separating core pattern is formed by conductive material and contacts institute State substrate.

4. semiconductor device according to claim 1, wherein the upper surface of the first structure and second structure that This is coplanar.

5. semiconductor device according to claim 4, wherein the first structure and second structure extend to described In substrate.

6. semiconductor device according to claim 1, wherein

The defiber of the first structure has the linearity configuration extended in a first direction,

The defiber of the first structure includes the end on the outside of the stacked structure,

The first direction is substantially parallel with the upper surface of the substrate.

7. semiconductor device according to claim 6, wherein second structure includes extending in said first direction Bar paten, and the defiber of the bar paten and the first structure corresponds.

8. semiconductor device according to claim 7, wherein

Every in the defiber of the first structure includes the segregated linear portion extended in said first direction and from described The marginal end portion that segregated linear portion extends,

The width of the marginal end portion in a second direction is bigger than the width of the segregated linear portion in this second direction, and And

The second direction is substantially parallel with the upper surface of the substrate and substantially vertical with the first direction.

9. semiconductor device according to claim 8, wherein

Each of described bar paten of second structure includes outward linear portion and extends simultaneously position from the outward linear portion In the first outboard end and the second outboard end on the two sides in the outward linear portion,

First outboard end towards the marginal end portion, and

The width of first outboard end in this second direction is greater than the outward linear portion in this second direction Width.

10. semiconductor device according to claim 9, wherein second outboard end is in this second direction Width and first outboard end in this second direction described of different size.

11. semiconductor device according to claim 7, wherein width in each of the bar paten is greater than described Every width in defiber.

12. semiconductor device according to claim 6, wherein second structure is that have to extend in a second direction Bar paten bar shape, or the linearity configuration with the line pattern extended in this second direction, described Two directions are substantially parallel with the upper surface of the substrate and substantially vertical with the first direction.

13. semiconductor device according to claim 1, wherein

Distance between the defiber in a second direction is greater than between the first structure and second structure first Distance on direction,

The first direction be the defiber pass through the multiple gate electrode at least part and in the stacked structure The direction upwardly extended outward, and

The second direction is substantially parallel with the upper surface of the substrate and substantially vertical with the first direction.

14. semiconductor device according to claim 1, the semiconductor device further include:

Channel semiconductor extends across the multiple grid electricity on the direction substantially vertical with the upper surface of the substrate Pole；And

Multiple data storage areas are arranged between the channel semiconductor and the multiple gate electrode.

15. a kind of semiconductor device, the semiconductor device include:

Stacked structure is arranged in substrate, wherein the stacked structure includes multiple gate electrodes；

A plurality of main defiber is upward through the stacked structure, In in the first party substantially vertical with the upper surface of the substrate The second party substantially parallel with the upper surface of the substrate upwardly extends and intersects with the stacked structure, and has and be located at The marginal end portion of the outside of the stacked structure；

A plurality of first time grade defiber, passes through the stacked structure in said first direction, extends in this second direction, And there is the marginal end portion on the outside of the stacked structure；

A plurality of second subprime defiber passes through the stacked structure in said first direction, and has towards the first time The inner end of grade defiber；And

The structure of the marginal end portion of the marginal end portion and first time grade defiber towards the main defiber,

Wherein, the upper surface of the upper surface and first time grade defiber of the upper surface of the structure and the main defiber is total Plane.

16. semiconductor device according to claim 15, wherein every in the main defiber is in the second direction On length be greater than every length in this second direction in first time grade defiber.

17. semiconductor device according to claim 15, the semiconductor device further include:

Partition pattern is arranged in the outside of the stacked structure and is arranged in the substrate,

Wherein, at least part of the substrate is arranged on the partition pattern.

18. semiconductor device according to claim 17, wherein first time grade defiber and the main defiber with The partition pattern is spaced apart.

19. semiconductor device according to claim 17, wherein first time the grade defiber, second of fraction Offline, the main defiber and the structure include separating core pattern and around the exhausted of the side surface of the separating core pattern jointly Insulating spacer.

20. a kind of semiconductor device, the semiconductor device include:

Memory array region and extension area, memory array region are arranged in substrate, and extension area is set as and the memory array Arrange Qu Xianglin；

Stacked structure is arranged in the memory array region and the extension area,

Wherein, the stacked structure include stack and be separated from each other in a first direction in the memory array region it is more A gate electrode,

Wherein, the first direction and the upper surface of the substrate are substantially vertical,

Wherein, the gate electrode extends in the extension area and multiple including being arranged in the extension area with step shape Pad；

Multiple memory vertical structures extend across the grid electricity in the memory array region in said first direction Pole；

A plurality of main defiber, intersects with the memory array region and the extension area, and makes the stacking in a second direction Structure separation；

A plurality of secondary defiber, the stacked structure in the extension area；And

It is arranged on the substrate and is arranged in the structure outside the stacked structure,

Wherein, the main defiber and the secondary defiber include extends from the extension area along third direction and is located at described in Marginal end portion on the outside of stacked structure,

Wherein, the structure includes the outboard end towards the marginal end portion,

Wherein, the upper surface of the upper surface of the main defiber, the upper surface of the secondary defiber and the structure is total each other Plane is simultaneously formed from the same material.

Technical field

The exemplary embodiment of present inventive concept is related to semiconductor device, more particularly, to including stacked structure and wearing Cross the semiconductor device of the defiber of stacked structure.

Background technique

Have increasing need for increasing the integrated level of semiconductor device.In order to improve the integrated level of semiconductor device, develop The three-dimensional semiconductor memory devices that grid stacks in the vertical direction of substrate.As integrated level increases, in three-dimensional semiconductor memory devices The quantity of piled grids also increase.

Summary of the invention

The exemplary embodiment of present inventive concept provides a kind of including defiber and the knot that can improve yield and productivity The semiconductor device of structure.

The exemplary embodiment conceived according to the present invention, semiconductor device include the stacked structure being arranged in substrate.Heap Stack structure includes multiple gate electrodes.Semiconductor device further include be arranged in substrate and pass through stacked structure first structure and The second structure in substrate is set.Second structure setting is in the outside of stacked structure, towards first structure and and first structure It is spaced apart.First structure includes at least part across the multiple gate electrode and extends outside stacked structure a plurality of Defiber, and the second structure is formed by material identical with the material of first structure.

The exemplary embodiment conceived according to the present invention, semiconductor device include the stacked structure being arranged in substrate.Heap Stack structure includes multiple gate electrodes.Semiconductor device further includes a plurality of main defiber, a plurality of main defiber with substrate The substantially vertical first party in upper surface is upward through stacked structure, prolongs in the second direction substantially parallel with the upper surface of substrate It stretches and intersects with stacked structure, and there is the marginal end portion positioned at the outside of stacked structure.Semiconductor device further includes a plurality of First time grade defiber, a plurality of first time grade defiber pass through stacked structure in a first direction, prolong in a second direction It stretches, and there is the marginal end portion on the outside of stacked structure.Semiconductor device further includes a plurality of second subprime defiber, The a plurality of second subprime defiber passes through stacked structure in a first direction, and has towards in first time grade defiber End.Semiconductor device further includes the structure of the marginal end portion of marginal end portion and first time grade defiber towards main defiber. The upper surface of the structure and the upper surface of main defiber and the upper surface of first time grade defiber are coplanar.

The exemplary embodiment conceived according to the present invention, semiconductor device include the memory array region being arranged in substrate The extension area adjacent with memory array region with being set as.Semiconductor device further includes being arranged in memory array region and extension area In stacked structure.Stacked structure includes the multiple grid for stacking and being separated from each other in a first direction in memory array region Electrode.The upper surface of first direction and substrate is substantially vertical.Gate electrode extends in extension area and is included in extension area with platform Multiple pads of stepped shape setting.Semiconductor device further include: multiple memory vertical structures extend across in a first direction Gate electrode in memory array region；A plurality of main defiber, intersects, and in a second direction with memory array region and extension area Separate stacked structure；A plurality of secondary defiber, extends through the stacked structure in area.Semiconductor device further includes being arranged in base On bottom and the structure outside stacked structure is set.Main defiber and secondary defiber include extending from extension area along third direction And it is located at the marginal end portion on the outside of stacked structure.The structure includes the outboard end towards marginal end portion.Main defiber The upper surface of upper surface, the upper surface of secondary defiber and the structure is coplanar each other and is formed from the same material.

Detailed description of the invention

Describe the exemplary embodiment of present inventive concept in detail by referring to accompanying drawing, present inventive concept it is above and other Feature will be apparent, in the accompanying drawings:

Figure 1A is the schematic block diagram of the semiconductor device for the exemplary embodiment conceived according to the present invention.

Figure 1B is the memory array for conceptually showing the semiconductor device for the exemplary embodiment conceived according to the present invention The circuit diagram in area.

Fig. 2 is the block diagram for schematically showing the semiconductor device for the exemplary embodiment conceived according to the present invention.

Fig. 3 A is the plan view for showing the semiconductor device for the exemplary embodiment conceived according to the present invention.

Fig. 3 B is the plan view for showing the stacked structure of Fig. 3 A for the exemplary embodiment conceived according to the present invention.

Fig. 4 is the close-up plan for showing the region " A " in Fig. 3 A for the exemplary embodiment conceived according to the present invention Figure.

Fig. 5 is cuing open for line I-I' in Fig. 4 and line the II-II' interception for the exemplary embodiment conceived according to the present invention View.

Fig. 6 is the cross-sectional view of the line III-III' interception in Fig. 4 for the exemplary embodiment conceived according to the present invention.

Fig. 7 is the cross-sectional view of the line IV-IV' interception in Fig. 4 for the exemplary embodiment conceived according to the present invention.

Fig. 8 is the cross-sectional view of the line V-V' interception in Fig. 4 for the exemplary embodiment conceived according to the present invention.

Fig. 9 is the cross-sectional view of the line VI-VI' interception in Fig. 4 for the exemplary embodiment conceived according to the present invention.

Figure 10 be show the component of semiconductor device for the exemplary embodiment conceived according to the present invention a part it is general Read cross-sectional view.

Figure 11 is the close-up plan for showing the region " A " in Fig. 3 A for the exemplary embodiment conceived according to the present invention Figure.

Figure 12 A be show the region " B " in the Figure 11 for the exemplary embodiment conceived according to the present invention partial enlargement it is flat Face figure.

Figure 12 B be show the region " B " in the Figure 11 for the exemplary embodiment conceived according to the present invention partial enlargement it is flat Face figure.

Figure 12 C be show the region " B " in the Figure 11 for the exemplary embodiment conceived according to the present invention partial enlargement it is flat Face figure.

Figure 13 is the close-up plan for showing the region " A " in Fig. 3 A for the exemplary embodiment conceived according to the present invention Figure.

Figure 14 is the cross-sectional view of the line II-II' interception in Figure 13 for the exemplary embodiment conceived according to the present invention.

Figure 15 is the close-up plan for showing the region " A " in Fig. 3 A for the exemplary embodiment conceived according to the present invention Figure.

Figure 16 is the close-up plan for showing the region " A " in Fig. 3 A for the exemplary embodiment conceived according to the present invention Figure.

Figure 17 is the flow chart for showing the method for the semiconductor device to form the exemplary embodiment conceived according to the present invention.

Figure 18 A, Figure 19 A and Figure 20 A are the line I-I' and line in Fig. 4 for the exemplary embodiment conceived according to the present invention The cross-sectional view of II-II' interception.

Figure 18 B, Figure 19 B and Figure 20 B are the line III-III' in Fig. 4 for the exemplary embodiment conceived according to the present invention The cross-sectional view of interception.

Figure 18 C, Figure 19 C and Figure 20 C are that the line VI-VI' in Fig. 4 for the exemplary embodiment conceived according to the present invention is cut The cross-sectional view taken.

Specific embodiment

Hereinafter, the exemplary embodiment for design that the present invention is more fully described with reference to the accompanying drawings.Throughout the drawings, Same appended drawing reference can indicate same element.

May be used herein for ease of description, such as " ... under ", " in ... lower section ", "lower", " ... Under ", " in ... top ", "upper" etc. spatially relative term to describe an elements or features and another member as illustrated in the drawing The relationship of part or feature.It will be appreciated that spatially relative term, which is intended to encompass device, to be made other than the orientation described in figure With or operation in different direction.For example, being described as " " other elements or features if the device in figure is reversed The element of " below " or " under " will then be positioned as " " other elements or features " top ".Therefore, exemplary term " in ... lower section " and "lower" may include above and below two kinds of orientation.In addition, it will be further understood that when layer is referred to as " " two layers " between " when, this layer can be the sole layer between described two layers, or there may also be one or more A middle layer.

It will be appreciated that term " first " used herein, " second ", " third " etc. are used for an element and another member Part distinguishes, and element should not be limited by these terms.Therefore, " first " element in exemplary embodiment can be another It is described as " second " element in exemplary embodiment.

It will be further understood that when two components and/or direction are described as being essentially parallel from one to another or extending vertically, institute State two components and/or direction be precisely parallel to each other or extend vertically, or as those of ordinary skill in the art incite somebody to action Understand approximatively parallel each other in measurement error extends vertically.In addition, when two or more elements or value are retouched It states when being substantially identical to one another or approximately equivalent, it will be appreciated that, element or value are mutually the same, each other undistinguishable, or each other Can distinguish, but as those of ordinary skill in the art would be understood by it is functionally mutually the same.

A referring to Fig.1 is described to the exemplary implementation of the semiconductor device for the exemplary embodiment conceived according to the present invention Example.

Figure 1A is the schematic block diagram of the semiconductor device for the exemplary embodiment conceived according to the present invention.

A referring to Fig.1, semiconductor device 1 accoding to exemplary embodiment may include memory array region MA, row decoder 3, page buffer 4, column decoder 5 and control circuit 6.Memory array region MA may include memory block BLK.

Memory array region MA may include the memory cell being arranged with multiple row and columns.It is included in memory array region Memory cell in MA may include wordline WL, at least one common source line CSL, string selection line SSL and the choosing of at least one ground Select line GSL.Memory cell can be electrically connected to page buffer 4 and column decoder 5 by bit line BL.

In the exemplary embodiment, among memory cell, the memory cell being arranged on a same row be can connect To same wordline WL, the memory cell being arranged in same row may be coupled to same bit line BL.

Row decoder 3 can be commonly connected to memory block BLK, and can select in response to block selection signal Memory block BLK wordline WL provide driving signal.For example, row decoder 3 can receive address information ADDR from outside, and And to received address information ADDR be decoded to determine to be supplied to and be electrically connected to wordline WL, the common source of memory block BLK At least part of voltage in polar curve CSL, string selection line SSL and ground selection line GSL.

Page buffer 4 can be electrically connected to memory array region MA by bit line BL.Page buffer 4 can be according to from column The decoding address of decoder 5 is connected to selected bit line BL.Page buffer 4 can temporarily be stored according to operation mode will storage The data of data or sensing storage in a memory cell in a memory cell.For example, page buffer 4 can program It is used as write driver circuits under operation mode, and is used as sense amplifier under read mode.Page buffer 4 Electric power (for example, voltage or electric current) can be received from control logic, and provide power to selected bit line BL.

Column decoder 5 can provide data biography between page buffer 4 and external device (ED) (for example, Memory Controller) Defeated path.Column decoder 5 can be decoded external input address to select any one in bit line BL.

Column decoder 5 can be commonly connected to memory block BLK, and can select in response to block selection signal Memory block BLK bit line BL provide data information.

Control circuit 6 can control the integrated operation of semiconductor device 1.Control circuit 6 can receive control signal and outer Portion's voltage, and can be operated in response to the received control signal of institute.Control circuit 6 may include being generated using external voltage The voltage generator of voltage needed for the operation of inside (for example, program voltage, reading voltage, erasing voltage etc.).Control circuit 6 can To control reading, write-in and/or erasing operation in response to control signal.

B referring to Fig.1 is described to the electricity of the memory array region (MA in Figure 1A) of semiconductor device 1 described in Figure 1A The illustrated examples on road.

Figure 1B is the circuit diagram for conceptually illustrating the memory array region MA in Figure 1A.

B referring to Fig.1, semiconductor device accoding to exemplary embodiment may include common source line CSL, bit line BL0 to BL2 And common source line CSL and bit line BL0 are set to multiple unit string CSTR between BL2.Multiple unit string CSTR can be simultaneously Connection is connected to each bit line BL0 to BL2.Multiple unit string CSTR can be commonly connected to common source line CSL.Multiple unit strings Each of CSTR may include lower selection transistor GST, memory cell MCT and the upper selection transistor that can be connected in series SST。

Memory cell MCT can be connected in series between lower selection transistor GST and upper selection transistor SST.Storage Each of device unit MCT may include the data storage area that can store information.

Upper selection transistor SST may be electrically connected to bit line BL0 to BL2, and lower selection transistor GST may be electrically connected to altogether Source electrode line CSL.

Upper selection transistor SST can be set to it is multiple, and by string selection line SSL1 to SSL2 control.Memory cell MCT can be controlled by a plurality of wordline WL0 to WLn (wherein, n is positive integer).

Lower selection transistor GST can be controlled by ground selection line GSL.Common source line CSL can be selected with being commonly connected to The source electrode of transistor GST.

In the exemplary embodiment, upper selection transistor SST can be string select transistor, and lower selection transistor GST can To be ground selection transistor.

Fig. 2 is the Figure 1A and figure schematically shown in the semiconductor device for the exemplary embodiment conceived according to the present invention The block diagram of memory block BLK in memory array region MA described in 1B.

Multiple memory block BLK of the memory array region MA referring to described in Fig. 2, Figure 1A and Figure 1B can be in first party Extend on X, and can sequentially be arranged while being separated from each other on second direction Y.Including depositing for memory block BLK Memory array area MA can be set in substrate 103.First direction X and second direction Y can be basic with the upper surface of substrate 103 In parallel, second direction Y can be the direction substantially vertical with first direction X.

Memory block BLK can be set between main defiber MS, and main defiber MS is arranged in substrate 103.Memory Each of block BLK can be set between a pair of adjacent main defiber MS.Therefore, memory block BLK can pass through main point Offline MS is separated and is spaced apart on second direction Y.

The half of the exemplary embodiment conceived according to the present invention is described now with reference to Fig. 3 A, Fig. 3 B and Fig. 4 to Figure 10 The example of conductor device.

Fig. 3 A is the plan view for showing the semiconductor device for the exemplary embodiment conceived according to the present invention.Fig. 3 B is to show The plan view of the stacked structure of Fig. 3 A for the exemplary embodiment conceived according to the present invention.Fig. 4 is to show to conceive according to the present invention Exemplary embodiment Fig. 3 A in region ' A ' close-up plan view.Fig. 5 is the exemplary reality conceived according to the present invention Apply the line I-I' in Fig. 4 of example and the cross-sectional view of line II-II' interception.Fig. 6 is the exemplary embodiment conceived according to the present invention In Fig. 4 line III-III' interception cross-sectional view.Fig. 7 is the exemplary embodiment conceived according to the present invention along Fig. 4 Line IV-IV' interception cross-sectional view.Fig. 8 is the line V-V' interception in Fig. 4 for the exemplary embodiment conceived according to the present invention Cross-sectional view.Fig. 9 is the cross-sectional view of the line VI-VI' interception in Fig. 4 for the exemplary embodiment conceived according to the present invention.Figure 10 be the concept cross-sectional view for showing a part of the component of semiconductor device for the exemplary embodiment conceived according to the present invention.

Hereinafter, the present invention will be described referring to Fig. 3 A to Figure 10 and above with reference to the description of Figure 1A, Figure 1B and Fig. 2 The exemplary embodiment of design.

It can be set referring to Fig. 3 A to Figure 10, the structure ST including first structure ST1, the second structure ST2 and stacked structure GS It sets in substrate 103.Substrate 103 can be the semiconductor base that can be formed by the semiconductor material such as by taking silicon as an example.

First structure ST1 may include main defiber MS and secondary defiber SS.

Main defiber MS can have the linearity configuration extended on X in a first direction.Stacked structure GS can be set in master Between defiber MS.Stacked structure GS can be set in substrate 103.Each of stacked structure GS can be set in a plurality of master Among defiber MS between the main defiber MS of a pair adjacent to each other.For example, a stacked structure GS can be set in a pair of of phase Between adjacent main defiber MS.

Main defiber MS can have passes through heap on the vertical direction Z substantially vertical with the upper surface 103s of substrate 103 The linearity configuration intersected on stack structure GS and in a first direction X with stacked structure GS.Therefore, main defiber MS can be in second party Stacked structure GS is set to separate and be spaced apart on Y.First direction X and second direction Y can be the upper surface 103s with substrate 103 Direction that is substantially parallel.First direction X and second direction Y can be substantially perpendicular to each other.

Every in a plurality of main defiber MS length in a first direction on X can be greater than each of stacked structure GS and exist Length on first direction X.

Secondary defiber SS can be set between main defiber MS.Secondary defiber SS can pass through stacked structure GS. Secondary defiber SS can be separated from each other.

Secondary defiber SS may include first time grade defiber SSa, second subprime defiber SSb and the separation of third time grade Line SSc.

First time grade defiber SSa can pass through stacked structure GS, the and (example on the outward direction of stacked structure GS Such as, in a first direction on X) extend.Second subprime defiber SSb and third time grade defiber SSc can pass through stacked structure GS.

First structure ST1 may include the linear defiber MS and SS upwardly extended outward in stacked structure GS.Example Such as, defiber MS and SS can be main defiber MS and first time grade defiber SSa.

Second structure ST2 can be set in substrate 103, and the outside (for example, external) of stacked structure GS is arranged in. For example, the second structure ST2 can be set to it is adjacent with immediate stacked structure GS, rather than become immediate stacked structure A part of GS.For example, as shown in Figure 4, the second structure ST2 is set as adjacent with stacked structure GS.In addition, the second structure ST2 can be spaced apart while facing first structure ST1 with first structure ST1.

In the exemplary embodiment, the second structure ST2 can be the structure with end, and the end is towards linear separation Line MS and SS is in the end of the stacked structure GS of first structure ST1 upwardly extended outward.Second structure ST2 can have The bar shaped extended on first direction X.Second structure ST2 can be the outward direction in stacked structure GS with first structure ST1 The linear one-to-one strip structure of defiber MS and SS of upper extension.In the exemplary embodiment, the bar shaped of the second structure ST2 Width of the structure on second direction Y can be essentially identical with the width of main defiber MS and secondary defiber SS.

Referring especially to Fig. 5, Fig. 7 and Fig. 9, the second structure ST2 can by with include main defiber MS and secondary defiber SS The identical material of material of first structure ST1 formed.Each of first structure ST1 and the second structure ST2 may include point Off-chip pattern 164 and insulating spacer 162 around the side surface of separating core pattern 164.Separating core pattern 164 can be by conduction Material is formed and can be contacted with substrate 103.In the exemplary embodiment, separating core pattern 164 can be by including for example mixing Miscellaneous polysilicon, metal nitride (for example, TiN), metal silicide (for example, WSi, TiSi, TaSi etc.) and metal (for example, At least one of) W conductive material is formed.Insulating spacer 162 can be by the insulating materials by taking silica etc. as an example It is formed.First structure ST1 and the second structure ST2 can have the upper surface to form coplanar surface.First structure ST1 and second Structure ST2 is extended in substrate 103.Second structure ST2, main defiber MS and secondary defiber SS can have by identical The section shape that component is formed.

Referring to Fig. 3 A to Figure 10, each of stacked structure GS may include gate electrode G_L, G_B1, G_M, G_B2 and G_ U, gate electrode G_L, G_B1, G_M, G_B2 and G_U can stack and meanwhile along with substantially vertical perpendicular of the upper surface 103s of substrate 103 Histogram is separated from each other to Z.Interlayer insulating film 106 can be set between gate electrode G_L, G_B1, G_M, G_B2 and G_U.Layer Between insulating layer 106 can be set most descending between gate electrode G_L and substrate 103.Gate electrode G_L, G_B1, G_M, G_B2 and G_U It can be by including the polysilicon, metal nitride (for example, TiN), metal silicide of such as doping (for example, WSi, TiSi, TaSi Deng) and the conductive material of at least one of metal (for example, W) formed.The polysilicon of doping can be for example comprising N-type impurity The polysilicon of (for example, P, As etc.) or p type impurity (for example, B etc.).

Each of stacked structure GS may include gate electrode G_L and G_B1 under one or more, setting at one or more Multiple intermediate gate electrode G_M on a lower gate electrode G_L and G_B1 and it is arranged on multiple on multiple intermediate gate electrode G_M Gate electrode G_B2 and G_U.

In the exemplary embodiment, gate electrode G_L and G_B1 under one or more can be set.Multiple lower gate electrode G_ L and G_B1 may include buffering grid under lower selection gate electrode G_L and the one or more being arranged on lower selection gate electrode G_L Electrode G_B1.Lower selection gate electrode G_L can be described in Figure 1A and Figure 1B selection line (for example, GSL).In exemplary reality It applies in example, is located relatively at the lower buffering gate electrode buffered below gate electrode G_B1 under one or more and is also used as ground selection line (for example, GSL in Figure 1A and Figure 1B).

In the exemplary embodiment, multiple intermediate gate electrode G_M can be wordline shown in Figure 1A and Figure 1B (for example, The WL0 to WLn in WL and Figure 1B in Figure 1A).

In the exemplary embodiment, in one or more gate electrode G_B2 and G_U can be set to it is multiple.On multiple Most upper gate electrode and/or the second most upper gate electrode among gate electrode G_B2 and G_U can be selection gate electrode G_U, be located at Gate electrode can be buffering gate electrode in one or more between upper selection gate electrode G_U and multiple intermediate gate electrode G_M G_B2.Upper selection gate electrode G_U can be described in Figure 1A and Figure 1B string selection line (for example, in SSL and Figure 1B in Figure 1A SSL1 to SSL2).In the exemplary embodiment, upper slow among the upper buffering gate electrode G_B2 being located on opposing lower portions Rushing gate electrode may be used as wordline described above.

Making the insulating pattern ISP for selecting gate electrode G_U to separate on second direction Y may include in semiconductor device 1 In.Insulating pattern ISP can be arranged at the position than intermediate gate electrode G_M high.Insulating pattern ISP can pass through upper selection Gate electrode G_U, and extend in a first direction on X to make selection gate electrode while intersecting with upper selection gate electrode G_U G_U is separated on second direction Y.Similarly, the third time grade defiber SSc among secondary defiber SS can be with upper choosing Gate electrode G_U intersection is selected, and makes that gate electrode G_U is selected to separate on second direction Y.Therefore, in two adjacent masters point Between offline MS, upper selection gate electrode G_U can be by third time grade defiber SSc and insulating pattern ISP on second direction Y It is separated into multiple.

The first insulating layer 130 for covering stacked structure GS may include in semiconductor device 1.First insulating layer 130 can With the upper surface with substantially flat.The second insulating layer 150 and third insulating layer sequentially stacked on the first insulating layer 130 170 may include in semiconductor device 1.First insulating layer 130, second insulating layer 150 and third insulating layer 170 can be by examples As silica is formed.

Main defiber MS and secondary defiber SS can pass through second insulating layer 150, the first insulating layer 130 and stacked structure GS.The second structure ST2 being spaced apart with stacked structure GS can pass through second insulating layer 150 and the first insulating layer 130.

The secondary defiber SS of first structure ST1 can be separated from each other, and can have end facing with each other.In In this case, stacked structure GS can be placed between the secondary defiber SS with end facing with each other.First insulating layer 130 and second insulating layer 150 can be placed in the second structure ST2 and be separated with main defiber MS and secondary towards the second structure ST2 Between line SS.

Memory array region MA and the extension area EA adjacent with memory array region MA can be set in substrate 103.Prolong Stretching area EA can be arranged on the two sides of memory array region MA.Main defiber MS, which can have, to be used for and memory array The shape that area MA and extension area EA intersects.As above with reference to described in Fig. 2, memory array region MA may include being arranged in master Multiple memory blocks (BLK in Fig. 2) between defiber MS.For example, any one of memory block (BLK in Fig. 2) It can be set between adjacent main defiber MS.

Referring especially to Fig. 6, in extension area EA, it is arranged on multiple intermediate gate electrode G_M and faces upper gate electrode G_U Floating dummy gate electrode G_F with a part of G_B2 may include in semiconductor device 1.Floating dummy gate electrode G_F can To be formed by material identical with the material of gate electrode G_L, G_B1, G_M, G_B2 and G_U.Floating dummy gate electrode G_F can be with Including the pad P being arranged with step shape, the pad P is gradually reduced on the direction towards upper gate electrode G_U and G_B2.

Referring especially to Fig. 4, Fig. 6 and Fig. 9, gate electrode G_L, G_B1, G_M, G_B2 and G_U be can have in extension area EA The pad P being arranged with step shape.Among gate electrode G_L, G_B1, G_M, G_B2 and G_U be located at extension area EA in and The part not being stacked with the gate electrode for being located at opposite upper parts can be defined as pad P.

The pad P of upper gate electrode G_U and G_B2 can be from memory array region MA to reducing on the direction of extension area EA The step shape setting of first step (or height).

Because the pad P of intermediate gate electrode G_M is arranged far from the direction of memory array region MA (for example, in first party To on X), so the pad P of intermediate gate electrode G_M can be with the step of the reduction second step bigger than first step (or height) Shape is arranged in extension area EA.The pad P of lower gate electrode G_L and G_B1 can prolonged with the step shape setting for reducing first step It stretches in area EA.

In extension area EA, because the pad P of intermediate gate electrode G_M can be arranged with Y in a second direction in a main defiber On any side of MS (this main defiber MS refers to any one in main defiber MS), so intermediate gate electrode G_M Pad P can be arranged with the step shape for reducing first step.

The pad of above-mentioned gate electrode G_L, G_B1, G_M, G_B2 and G_U are not limited to above-mentioned step shape.For example, exemplary In embodiment, the pad of gate electrode G_L, G_B1, G_M, G_B2 and G_U can be arranged with various other step shapes.

Contact plug 180 across the first insulating layer 130, second insulating layer 150 and third insulating layer 170 is arranged in gate electrode On the pad P of G_L, G_B1, G_M, G_B2 and G_U.Contact plug 180 can be contacted with pad P.It is spaced apart with stacked structure GS external Touching plug 182 can be set in the outside (for example, external) of stacked structure GS.For example, outer contacting plug 182 can be set to and most connect Close stacked structure GS is adjacent, rather than becomes a part of immediate stacked structure GS.For example, as shown in Figure 4, it is external Touching plug 182 is set as adjacent with stacked structure GS.

Referring especially to Fig. 4, Fig. 6 and Fig. 7, memory vertical structure VSm be can be set in substrate 103.Memory is vertical Structure VSm extends on the direction Z substantially vertical with the upper surface 103s of substrate 103.Memory vertical structure VSm can be passed through Stacked structure GS in the MA of memory array region.Memory vertical structure VSm can be placed through memory array region MA In interlayer insulating film 106 and stacked structure GS.

Across second insulating layer 150 and third insulating layer 170 and it is electrically connected to the bit line plug of memory vertical structure VSm 175 may include in semiconductor device 1.Therefore, memory vertical structure VSm can be electrically connected to figure by bit line plug 175 Bit line described in 1A and Figure 1B (for example, BL1 to BL2 in BL and Figure 1B in Figure 1A).

Referring especially to Fig. 8, in the exemplary embodiment, stacked structure GS can be passed through and be formed with vertical with memory The illusory vertical structure VSd of the same or similar structure of the structure of structure VSm can be set in substrate 103.

In the exemplary embodiment, can be set in substrate 103, be spaced apart with stacked structure GS and by with memory The external vertical structure VSe that the same or similar structure of the structure of vertical structure VSm is formed can be set in semiconductor device 1 In.

Referring especially to Figure 10, each of memory vertical structure VSm may include the channel extended in vertical direction Semiconductor layer 140 and the gate dielectric structure 128 being arranged between channel semiconductor 140 and stacked structure GS.

Each of memory vertical structure VSm can also include semiconductor pattern 122, be arranged in semiconductor pattern 122 On vertical core pattern 132 and the pad pattern 134 that is arranged on vertical core pattern 132.

Channel semiconductor 140 can be set to that it is made to contact semiconductor pattern 122 and around vertical core pattern 132 Outer surface.Gate dielectric structure 128 can be set to the outer surface for making it surround channel semiconductor 140.Semiconductor pattern 122 can be such as epitaxial material, which can be formed by selective epitaxial growth (SEG) technique.It is perpendicular Straight core pattern 132 can be formed by such as insulating materials (for example, silica etc.).Padding pattern 134 can be by for example leading with N-type Electrical polysilicon is formed, and can be drain region.The level high in the level than gate structure GS can be set in pad pattern 134 On.The pad pattern 134 of memory vertical structure VSm may be electrically connected to bit line plug 175 described above.

Channel semiconductor 140 can be upwardly extended in the side substantially vertical with the surface of substrate 103, and can be passed through The intermediate gate electrode G_M and upper gate electrode G_U of stacked structure GS.Channel semiconductor 140 can be formed by such as polysilicon layer. Semiconductor pattern 122 can pass through lower gate electrode G_L.Semiconductor pattern 122 can be referred to as lower channel semiconductor layer.

Gate dielectric structure 128 may include tunnel dielectric 126, data storage layer 125 and barrier dielectric 124.Number It can be set between tunnel dielectric 126 and barrier dielectric 124 according to accumulation layer 125.Barrier dielectric 124 can be set Between data storage layer 125 and stacked structure GS.Tunnel dielectric 126 can be set partly to be led in data storage layer 125 and channel Between body layer 140.Tunnel dielectric 126 may include the silica of such as silica and/or impurity.Barrier dielectric 124 may include such as silica and/or high dielectric.Data storage layer 125 can by can store information such as with nitrogen Material for SiClx is formed.

Data storage layer 125 may include can be in channel semiconductor 140 and the intermediate gate electrode G_M that can be wordline Between storing data data storage area 125d.For example, according to the operation of the non-volatile memory device of such as flash memory device Condition, can capture and retain and be injected into data storage area 125d from channel semiconductor 140 by tunnel dielectric 126 Electronics, or the electronics captured in the data storage area 125d of data storage layer 125 can be wiped.Therefore, above in fig. ib The memory cell (for example, MCT in Figure 1B) of description may include data storage area 125d.

It is arranged between gate electrode G_L, G_B1, G_M, G_B2 and G_U and memory vertical structure VSm and extends to grid Additional gate dielectric 155 on each of the upper face of electrode G_L, G_B1, G_M, G_B2 and G_U and lower surface can To be included in semiconductor device 1.Additional gate dielectric 155 can be formed such as the high dielectric as such as aluminium oxide.

Present inventive concept is not limited to the above exemplary embodiments, but various modifications can be carried out.Hereinafter, by reference The various exemplary embodiments of the semiconductor device for the exemplary embodiment that Figure 11 to Figure 16 description is conceived according to the present invention are each Kind modified example.

Figure 11 is the close-up plan for showing the region ' A ' in Fig. 3 A for the exemplary embodiment conceived according to the present invention Figure, shows the example of the shape of first structure ST1 and the second structure ST2.Each of Figure 12 A, Figure 12 B and Figure 12 C are to show The close-up plan view in the region ' B ' in the Figure 11 for the exemplary embodiment conceived according to the present invention.Figure 13 is to show basis The close-up plan view in the region ' A ' in Fig. 3 A of the exemplary embodiment of present inventive concept.Figure 14 is structure according to the present invention The cross-sectional view of the line II-II' interception in Figure 13 of the exemplary embodiment of think of.Figure 15 is to show showing of conceiving according to the present invention The close-up plan view in the region ' A ' in Fig. 3 A of example property embodiment.Figure 16 be show conceive according to the present invention it is exemplary The close-up plan view in the region ' A ' in Fig. 3 A of embodiment.

For ease of description, when describing following various exemplary embodiments or various modifications example, it is convenient to omit first The component of preceding description further describes, and description can focus primarily upon the component of the component and modification that newly introduce.

Firstly, referring to Fig.1 1 and Figure 12 A to be described to the example of the shape of first structure ST1 and the second structure ST2.Figure 11 shows The example of the shape of first structure ST1 and the second structure ST2 is gone out.

1 and Figure 12 A referring to Fig.1, as described above, first structure ST1 may include main defiber MS and secondary defiber SS. Main defiber MS and secondary defiber SS can have essentially identical width on second direction Y.In secondary defiber SS Every can be to have the length shorter than every length in main defiber MS on X in a first direction.

In the exemplary embodiment, main defiber MS can be to extend on X in a first direction, and may include having first The linear portion of width Wa1 and from linear portion extend, on the two sides of linear portion and have greater than the first width Wa1 second The end MSe of width Wa2.

In the exemplary embodiment, every in secondary defiber SS can be to extend on X in a first direction, and can wrap It includes the linear portion with the first width Wa1 and extends from linear portion, is on the two sides of linear portion and wide with being greater than first Spend the end SSe of the second width Wa2 of Wa1.

Main defiber MS and first time grade defiber SSa can upwardly extend identical length in stacked structure GS outward Degree.Main defiber MS can upwardly extending outward in stacked structure GS, make winner defiber MS include be located at stacked structure End MSe on the outside of GS.First time grade defiber SSa in secondary defiber SS can stacked structure GS outward It upwardly extends, so that first time grade defiber SSa has the end SSe on the outside of stacked structure GS.

The end MSe of the end SSe and main defiber MS of first time grade defiber SSa can have essentially identical ruler It is very little.For example, every in first time grade defiber SSa and main defiber MS may include segregated linear portion and from segregated linear The marginal end portion SSe and MSe that portion extends.Marginal end portion SSe and MSe can be positioned at the outsides (for example, external) of stacked structure GS. For example, marginal end portion SSe and MSe can be set to adjacent with immediate stacked structure GS, and can not be immediate A part of stacked structure GS.Width Wa2 of the marginal end portion SSe and MSe on second direction Y can be greater than segregated linear portion and exist Width Wa1 on second direction Y.

In the exemplary embodiment, the second structure ST2 can be on the outside of stacked structure GS, and can have point The bar paten ST2a of bar shape not corresponding with first time grade defiber SSa and main defiber MS.

Each of the bar paten ST2a of second structure ST2 can have outward linear portion and extend simultaneously from outward linear portion The first outboard end ST2_e1 and the second outboard end ST2_e2 on the two sides in outward linear portion.

The first outboard end ST2_e1 of the bar paten ST2a of second structure ST2 can have width on second direction Y Spend Wb2, width Wb1 of the outward linear portion of bar paten ST2a of the width Wb2 greater than the second structure ST2 on second direction Y. The first outboard end ST2_e1 of the bar paten ST2a of second structure ST2 can have on second direction Y with the second structure The width of different size of the second outboard end ST2_e2 of the bar paten ST2a of ST2.The bar paten of second structure ST2 The first outboard end ST2_e1 of ST2a can have the second outboard end ST2_ of the bar paten ST2a than the second structure ST2 The big width of the width of e2.

The first outboard end ST2_e1 of the bar paten ST2a of second structure ST2 can be towards first time grade defiber The marginal end portion SSe and MSe on the outside of stacked structure GS of SSa and main defiber MS.

The defiber including first time grade defiber SSa and main defiber MS on the outside positioned at stacked structure GS SSa is spaced apart the bar paten that distance D2 can be greater than the second structure ST2 facing with each other between MS on second direction Y The the first outboard end ST2_e1 and first time grade defiber SSa of ST2a and the outside positioned at stacked structure GS of main defiber MS On marginal end portion SSe and MSe between the distance D1 that is spaced apart on X in a first direction.That is, between defiber SSa and MS The distance D2 being spaced apart on two direction Y, which can be greater than between first structure ST1 and the second structure ST2 on X in a first direction, to be spaced The distance D1 opened.

In the example of modification, 2B referring to Fig.1, the bar paten (for example, ST2a in Figure 12 A) of the second structure ST2 can To be modified to bar paten ST2b, bar paten ST2b includes having than outward linear portion in the second Y-direction in second party The second outboard end ST2_e2' of width Wb1 on Y big width Wb3.Therefore, the bar paten ST2b of modification can wrap It includes outward linear portion and is arranged in outside first on the two sides of outer linear portion and with the width bigger than the width in outward linear portion Side end ST2_e1 and the second outboard end ST2_e2'.

In the example of modification, 2C referring to Fig.1, the bar paten (for example, ST2a in Figure 12 A) of the second structure ST2 can To be modified to bar paten ST2c, bar paten ST2c has than the first time fraction on the outside of stacked structure GS The width Wa2 of the end MSe of the end SSe and main defiber MS of offline SSa big width Wb1'.

In the example of modification, 3 and Figure 14, semiconductor device accoding to exemplary embodiment can also include referring to Fig.1 The stacked partition pattern 105 at least part of the second structure ST2.Partition pattern 105 can be by such as with silica, nitridation Insulating materials for silicon etc. is formed.Partition pattern 105 can be set in substrate 103.Partition pattern 105 can be in second party There is the bar shape of elongation on Y.At least part of second structure ST2 can be set on partition pattern 105.Including master The first structure ST1 of defiber MS and secondary defiber SS can be spaced apart with partition pattern 105.In the exemplary embodiment, First structure ST1 is not stacked with partition pattern 105.The outside in stacked structure GS can be set (for example, outer in partition pattern 105 Portion) and be arranged in substrate 103.For example, partition pattern 105 can be set to adjacent with stacked structure GS, rather than become A part of stacked structure GS.

In the example of modification, referring to Fig.1 5, as described above, having the item of the bar shape of elongation on X in a first direction Shape pattern (for example, ST2a in Figure 12 A) can be modified to the bar paten of the bar shape extended on second direction Y ST2d。

In the example of modification, referring to Fig.1 6, the second structure ST2 can be transformed to extend on second direction Y linear The line pattern ST2e of shape.

Next, 7, Figure 18 A to Figure 18 C, Figure 19 A to Figure 19 C and Figure 20 A to Figure 20 C to describe root will be formed referring to Fig.1 According to the method for the semiconductor device of the exemplary embodiment of present inventive concept.

Figure 17 is the flow chart for showing the method for the semiconductor device to form the exemplary embodiment conceived according to the present invention. Figure 18 A, Figure 19 A and Figure 20 A are that the line I-I' in Fig. 4 and line II-II' for the exemplary embodiment conceived according to the present invention are cut The cross-sectional view taken.Figure 18 B, Figure 19 B and Figure 20 B are the line III- in Fig. 4 for the exemplary embodiment conceived according to the present invention The cross-sectional view of III' interception.Figure 18 C, Figure 19 C and Figure 20 C are the exemplary embodiments conceived according to the present invention along Fig. 4 The cross-sectional view of line VI-VI' interception.

Referring to Fig. 4, Figure 17, Figure 18 A, Figure 18 B and Figure 18 C, can be formed including alternately and being repeatedly stacked on base The molding structure 112 (S10) of interlayer insulating film 106 and grid layer 109 on bottom 103.Interlayer insulating film 106 can be by such as oxygen SiClx is formed, and grid layer 109 can be formed by such as silicon nitride.

The pad area 109f (S20) of grid layer 109 can be formed.Formed pad area the step of may include using photograph technique and Etch process makes the patterning of grid layer 109 to form the pad area of step shape.Step shape can be formed as various shape, and It is not limited to shape shown in figure.

Referring to Fig. 4, Figure 17, Figure 19 A, Figure 19 B and Figure 19 C, first planarized on molding structure 112 can be formed in absolutely Edge layer 130.The vertical structure (S30) across molding structure 112 can be formed.Vertical structure can be to be retouched referring to Fig. 4 to Figure 10 Memory vertical structure VSm, illusory vertical structure VSd and the external vertical structure VSe stated.It is memory vertical structure VSm, illusory Vertical structure VSd and external vertical structure VSe can be identical as the memory vertical structure VSm of referring to Fig.1 0 description.For example, shape It may include the channel hole to be formed across the first insulating layer 130 and molding structure 112 at the step of vertical structure and will be vertical Structure VSm, VSd and VSe are filled into channel hole.

Referring to Fig. 4, Figure 17, Figure 20 A, Figure 20 B and Figure 20 C, second insulating layer can be formed on the first insulating layer 130 150.The first opening portion 153 and the second opening portion 154 (S40) can be formed.First opening portion 153 and the second opening portion 154 can By forming the first insulating layer 130, second insulating layer 150 and the patterning of molding structure 112 to expose substrate 103.The The flat shape of one opening portion 153 can with as referring to including main defiber MS and secondary defiber described in Fig. 3 A to Figure 10 The flat shape of the first structure ST1 of SS is identical.The flat shape of second opening portion 154 can be with such as reference Fig. 3 A to Figure 10 institute The flat shape of second structure ST2 of description is identical.

Referring again to Fig. 3 A to Figure 10, gate electrode G_L, G_B1, G_M, G_B2 and G_U replacement grid layer 109 can be used (S50).The step of replacing grid layer 109 using gate electrode G_L, G_B1, G_M, G_B2 and G_U may include that removal is opened by first The grid layer 109 of the exposure of oral area 153 is to form empty space and formation gate electrode G_L, G_B1, G_M, G_ in empty space B2 and G_U.For example, after removing the grid layer 109 exposed by the first opening portion 153 to form void space, it can be in sky The metal material such as by taking tungsten as an example is deposited in space on gate electrode G_L, G_B1, G_M, G_B2 and G_U, residual can be removed Metal material in the first opening portion 153.

Next, the above-mentioned first structure ST1 and the of the first opening portion 153 of filling and the second opening portion 154 can be formed Two structure ST2 (S60).Third insulating layer 170 can be formed in second insulating layer 150.

It can be formed across second insulating layer 150 and third insulating layer 170 and be electrically connected to memory vertical structure VSm Bit line plug 175.Contact plug 180 (S70) can be formed.Contact plug 180 can pass through the first insulating layer to third insulating layer 130,150 and 170, and it is electrically connected to gate electrode G_L, G_B1, G_M, G_B2 and G_U.It can be formed and gate electrode G_L, G_ Outer contacting plug 182 that is that B1, G_M, G_B2 and G_U are spaced apart and being spaced apart with contact plug 180.

As described above, after removing by the grid layer 109 of the first opening portion 153 exposure to form the space of sky, it can be with The metal material by taking tungsten etc. as an example is deposited to form gate electrode G_B1, G_M, G_B2 and G_U, can remove and remain in first Metal material in opening portion 153.

In the exemplary embodiment, the planar shaped of the end of the first opening portion 153 on the outside of molding structure 112 Shape will not excessively be narrowed by the second opening portion 154.For example, by etch process come etch-forming structure 112 to form first During the technique of opening portion 153 and the second opening portion 154, etching gas can be continuously supplied into the second opening portion 154 with Form the second opening portion 154.Therefore, etching gas can be suitably supplied on the outside of molding structure 112 The end of one opening portion 153.

For example, the second opening portion 154 is located at outmost one in the first opening portion 153 and the second opening portion 154. Therefore, although reducing by etching loading effect and will be supplied to the amount of the etching gas in the second opening portion 154, with The amount of the progress of etch process, the etching gas being supplied in the first opening portion 153 in relative inner can not be reduced. Therefore, the first opening portion 153 that can directly or indirectly influence the electrical characteristics of semiconductor device without defect can be formed. Therefore, because the second opening portion 154 allows the first opening portion 153 to obtain enough plane domains, it is possible to which removal remains in The metal material such as by taking tungsten as an example in first opening portion 153 is without defect.Therefore, can improve including being formed in first The productivity of the semiconductor device of opening portion 153 and first structure ST1 and the second structure ST2 in the second opening portion 154, and The reliability of semiconductor device can be improved.In addition, even if when the grid layer 109 of molding structure 112 quantity increase when, can also Do not have defective semiconductor device to be formed.Therefore, the exemplary embodiment conceived according to the present invention can increase gate electrode Quantity, and the integrated level of semiconductor device can be improved.

The exemplary embodiment conceived according to the present invention provides a kind of semiconductor device, which improves good Rate and productivity, and further improve integrated level and reliability.

In the exemplary embodiment of present inventive concept, a kind of three-dimensional (3D) memory array is provided.3D memory array It is monolithically formed in one or more physical levels of memory cell array, there is the memory cell array setting to exist Active area and circuit associated with the operation of these memory cells above silicon base, no matter this associated circuit is In this substrate or in this substrate.Term " monolithic " indicates that the layer of each of array grade is deposited directly under each of array On the layer of grade.

In the exemplary embodiment of present inventive concept, 3D memory array includes vertically oriented vertical nand string, is made At least one processor unit is obtained to be located on another memory cell.At least one processor unit may include charge-trapping Layer.

The following patent disclosure being included herein by reference describes the suitable constructions for 3 D memory array, In, 3 D memory array is configured to multiple grades, and wordline and/or bit line are shared between multiple grades: United States Patent (USP) is public Open 7,679,133；8,553,466；8,654,587；8,559,235；With U.S. Patent Publication 2011/0233648.

Although being particularly shown and described present inventive concept referring to the exemplary embodiment of present inventive concept, Those skilled in the art will appreciate that not departing from the spirit and scope for the present inventive concept being defined by the claims In the case of, various changes can be carried out in form and details.