阅读说明：本技术 晶圆上芯方法、装置、存储介质和电子设备 (Wafer core mounting method and device, storage medium and electronic equipment ) 是由 梁赛嫦 吴佳蒙 郭依腾 曾丹 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种晶圆上芯方法、装置、存储介质和电子设备。该方法包括：获取到待上芯的目标晶圆和目标晶圆的晶圆图,其中,晶圆图包括有目标晶圆中的芯片的标志；根据晶圆图中的特殊芯片标志和/或边缘芯片标志将目标晶圆和晶圆图对齐；在对齐目标晶圆和晶圆图后,根据晶圆图中的良品芯片标志封装目标晶圆中的良品芯片。本发明解决了晶圆上芯准确度低的技术问题。(The invention discloses a wafer coring method, a device, a storage medium and an electronic device. The method comprises the following steps: acquiring a target wafer to be cored and a wafer map of the target wafer, wherein the wafer map comprises marks of chips in the target wafer; aligning the target wafer with the wafer map according to the special chip marks and/or the edge chip marks in the wafer map; and after the target wafer and the wafer map are aligned, packaging good chips in the target wafer according to the good chip marks in the wafer map. The invention solves the technical problem of low accuracy of the wafer core mounting.)

1. A method for coring a wafer, comprising:

acquiring a target wafer to be cored and a wafer map of the target wafer, wherein the wafer map comprises marks of chips in the target wafer;

aligning the target wafer with the wafer map according to special chip marks and/or edge chip marks in the wafer map;

and after aligning the target wafer and the wafer map, packaging good chips in the target wafer according to good chip marks in the wafer map.

2. The method of claim 1, wherein aligning the target wafer with the wafer map according to special chip marks and/or edge chip marks in the wafer map comprises:

determining that the target wafer is aligned with the wafer map when the chip on the target wafer corresponding to the special chip mark is a special chip; or

Determining that the target wafer is aligned with the wafer map when the chip on the target wafer corresponding to the edge chip mark is an edge chip; or

And determining that the target wafer is aligned with the wafer map under the condition that the chip on the target wafer corresponding to the special chip mark is a special chip and the chip on the target wafer corresponding to the edge chip mark is an edge chip.

3. The method of claim 1, wherein prior to acquiring the target wafer to be cored and the wafer map of the target wafer, the method further comprises:

selecting a plurality of target positions on the target wafer;

and arranging a special chip on the target position, and arranging an edge chip on the edge position of the target wafer.

4. The method of claim 3, further comprising: the plurality of target locations are regularly distributed on the target wafer.

5. The method of claim 1, wherein prior to aligning the target wafer and the wafer map according to special chip marks and/or edge chip marks in the wafer map, the method further comprises:

and adjusting the directions of the target wafer and the wafer graph to be consistent according to the direction of the optical plate of the target wafer and the direction of the optical plate in the wafer graph.

6. The method of any one of claims 1 to 5, wherein the packaging good chips in the target wafer according to good chip marks in the wafer map after aligning the target wafer and the wafer map comprises:

taking down chips marked as good chips in the corresponding wafer graph in the target wafer from the blue film;

and reserving the chips marked as special chips, edge chips or non-good chips in the corresponding wafer graph in the target wafer on the blue film.

7. A method for coring a wafer, comprising:

acquiring a target wafer to be cored and a wafer map of the target wafer, wherein the wafer map comprises marks of chips in the target wafer;

aligning the target wafer with the wafer map according to special chip marks and/or edge chip marks in the wafer map;

and after aligning the target wafer and the wafer map, packaging good chips in the target wafer according to good chip marks in the wafer map.

8. The method of claim 7, wherein the aligning the target wafer and the wafer map according to the special chip mark and/or the edge chip mark in the wafer map comprises:

determining that the target wafer is aligned with the wafer map when the chip on the target wafer corresponding to the special chip mark is a special chip; or

Determining that the target wafer is aligned with the wafer map when the chip on the target wafer corresponding to the edge chip mark is an edge chip; or

And determining that the target wafer is aligned with the wafer map under the condition that the chip on the target wafer corresponding to the special chip mark is a special chip and the chip on the target wafer corresponding to the edge chip mark is an edge chip.

9. A computer-readable storage medium, in which a computer program is stored, which computer program, when running, performs the method of any one of claims 1 to 6.

10. An electronic device comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to execute the method of any of claims 1 to 6 by means of the computer program.

Technical Field

The invention relates to the field of wafer coring, in particular to a wafer coring method and device, a storage medium and electronic equipment.

Background

In the prior art, in the process of mounting chips on a wafer, after the wafer and a wafer map are obtained, since the wafer map only includes good chip marks and non-good chip marks, in the process of mounting chips on the wafer according to the wafer map, a chip mounting error is easily caused, for example, a good chip is used as a non-good chip, and a non-good chip is used as a good chip for mounting chips.

Disclosure of Invention

The embodiment of the invention provides a wafer coring method, a device, a storage medium and electronic equipment, which at least solve the technical problem of low coring accuracy of a wafer.

According to an aspect of an embodiment of the present invention, there is provided an on-wafer coring method, including: acquiring a target wafer to be cored and a wafer map of the target wafer, wherein the wafer map comprises marks of chips in the target wafer; aligning the target wafer with the wafer map according to special chip marks and/or edge chip marks in the wafer map; and after the target wafer and the wafer map are aligned, packaging good chips in the target wafer according to the good chip marks in the wafer map.

According to another aspect of the embodiments of the present invention, there is provided an upper core device of a wafer, including: the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a target wafer to be cored and a wafer map of the target wafer, and the wafer map comprises marks of chips in the target wafer; an alignment unit, configured to align the target wafer with the wafer map according to a special chip mark and/or an edge chip mark in the wafer map; and the packaging unit is used for packaging good chips in the target wafer according to the good chip marks in the wafer map after the target wafer and the wafer map are aligned.

As an optional example, the apparatus further includes: the selection unit is used for selecting a plurality of target positions on a target wafer to be cored and before acquiring a wafer map of the target wafer; and the setting unit is used for setting a special chip on the target position and setting an edge chip on the edge position of the target wafer.

As an optional example, the apparatus further includes: the target positions are regularly distributed on the target wafer.

As an optional example, the apparatus further includes: and an adjusting unit, configured to adjust the direction of the target wafer and the direction of the wafer map to be the same according to the direction of the optical plate of the target wafer and the direction of the optical plate in the wafer map before aligning the target wafer and the wafer map according to the special chip mark and/or the edge chip mark in the wafer map.

As an alternative example, the encapsulation unit includes: the processing module is used for taking down chips marked as good chips in the corresponding wafer graph from the blue film in the target wafer; and reserving the chips marked as special chips, edge chips or non-good chips in the corresponding wafer map in the target wafer on the blue film.

According to another aspect of the embodiments of the present invention, there is also provided a storage medium, in which a computer program is stored, wherein the computer program is configured to execute the above-mentioned on-wafer coring method when running.

According to another aspect of the embodiments of the present invention, there is also provided an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to perform the above on-wafer coring method.

In the embodiment of the invention, a target wafer to be cored and a wafer map of the target wafer are obtained, wherein the wafer map comprises marks of chips in the target wafer; aligning the target wafer with the wafer map according to special chip marks and/or edge chip marks in the wafer map; after the target wafer and the wafer map are aligned, good chips in the target wafer are packaged according to the good chip marks in the wafer map.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a flow chart of an alternative on-wafer coring method in accordance with embodiments of the present invention;

FIG. 2 is a specific chip diagram of an alternative on-wafer core approach in accordance with embodiments of the present invention;

FIG. 3 is a specific chip diagram of an alternative on-wafer core approach in accordance with embodiments of the present invention;

FIG. 4 is a generic chip diagram of an alternative on-wafer core approach in accordance with embodiments of the invention;

FIG. 5 is a schematic view of a wafer of an alternative core-on-wafer method according to an embodiment of the present invention;

FIG. 6 is a wafer diagram of an alternative core-on-wafer approach in accordance with embodiments of the present invention;

FIG. 7 is a schematic view of a wafer of an alternative core-on-wafer method according to an embodiment of the invention;

FIG. 8 is a schematic illustration of an alternative light panel for a core-on-wafer approach in accordance with embodiments of the present invention;

FIG. 9 is a schematic diagram of a light panel for an alternative on-wafer coring method in accordance with embodiments of the present invention;

fig. 10 is a block diagram of an alternative core-on-wafer device in accordance with an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

According to a first aspect of embodiments of the present invention, there is provided an on-wafer coring method, optionally as shown in fig. 1, the method comprising:

s102, obtaining a target wafer to be cored and a wafer map of the target wafer, wherein the wafer map comprises marks of chips in the target wafer;

s104, aligning the target wafer with the wafer map according to the special chip mark and/or the edge chip mark in the wafer map;

and S106, after the target wafer and the wafer map are aligned, packaging good chips in the target wafer according to the good chip marks in the wafer map.

Optionally, in this embodiment, in the process of mounting the target wafer, after the target wafer is obtained, the target wafer may be aligned with the wafer map, and then, in the aligned target wafer and the wafer map, if a good chip is marked on the wafer map, it is described that the chip on the corresponding target wafer is a good chip, and the good chip is packaged and mounted.

In this embodiment, a special chip and an edge chip may be mounted on the target wafer. The special chips may be randomly distributed or regularly distributed on the target wafer. The edge chip is located at the edge position of the target wafer. After the corresponding wafer map is obtained, good chips, non-good chips, special chip marks and edge chip marks are marked on the chips on the target wafer in the wafer map, and the chips correspond to various chips on the target wafer. And extracting good chips from the target wafer through the marks of the good chips.

In this embodiment, the target wafer and the wafer map can be aligned through the special chip and the edge chip on the target wafer and the special chip mark and the edge chip mark in the wafer map, so that a good chip can be obtained from the target wafer according to the aligned target wafer and the aligned wafer map and the mark of the good chip on the wafer map, and the accuracy of chip mounting on the wafer is improved.

As an alternative example, aligning the target wafer with the wafer map according to the specific chip marks and/or edge chip marks in the wafer map comprises:

determining that the target wafer is aligned with the wafer map under the condition that the chip on the target wafer corresponding to the special chip mark is the special chip; or

Determining that the target wafer is aligned with the wafer map under the condition that the chip on the target wafer corresponding to the edge chip mark is the edge chip; or

And determining that the target wafer is aligned with the wafer map under the condition that the chip on the target wafer corresponding to the special chip mark is the special chip and the chip on the target wafer corresponding to the edge chip mark is the edge chip.

Optionally, in this embodiment, when aligning the target wafer and the wafer map, the alignment may be performed according to a special chip, or the alignment may be performed according to an edge chip, or the special chip and the edge chip are used together for alignment.

If the special chip is used for alignment, the position of the special chip is determined on the wafer, the position of the mark of the special chip is determined on the wafer map, and the two positions are aligned, so that the target wafer and the wafer map can be aligned. If there are more than one special chip, there are more than one corresponding special chip mark. And aligning each special chip with the special chip mark, and aligning the target wafer with the wafer map.

If the edge chips are used for alignment, the edge positions on the wafer comprise a plurality of edge chips, the wafer graph is marked with edge chip marks, the edge chips and the edge chip marks are aligned, and the target wafer is aligned with the wafer graph.

Through the embodiment, the target wafer and the wafer map can be aligned, good chips of the target wafer are extracted according to the wafer map, and the accuracy of chip mounting on the wafer is improved.

As an optional example, before acquiring the target wafer to be cored and the wafer map of the target wafer, the method further includes:

selecting a plurality of target locations on a target wafer;

and arranging a special chip on the target position, and arranging an edge chip on the edge position of the target wafer.

Alternatively, in this embodiment, the special chip may include one or more chips. The location of a particular chip may be a randomly selected location on the target wafer. For example, the center of the target wafer may be selected to set a specific chip. If the number of the special chips is multiple, the special chips can be randomly arranged at different positions of the target wafer. And edge chips can be arranged at the edge position of the target wafer. The edge chips and good chips/non-good chips are the same and can be marked with edge chip marks on the wafer map.

Through the embodiment, the target wafer and the wafer map can be accurately aligned through the special chip and the edge chip, and the accuracy of chip mounting on the wafer is improved.

As an optional example, the method further comprises: the plurality of target locations are regularly distributed on the target wafer.

Optionally, in this embodiment, the positions of the specific chips on the target wafer may be regularly distributed. Such as up/down/left/right N chips per special chip or special chips. N is a positive integer. The special chips in regular distribution can ensure the accuracy of aligning the target wafer and the wafer map.

As an alternative example, before aligning the target wafer with the wafer map according to the special chip mark and/or the edge chip mark in the wafer map, the method further comprises:

and adjusting the directions of the target wafer and the wafer picture to be consistent according to the direction of the light plate of the target wafer and the direction of the light plate in the wafer picture.

Optionally, in this embodiment, a light plate may be disposed on the target wafer, and the light plate does not include any chip. A light plate can be arranged on one side of the target wafer, and the directions of the target wafer and the wafer picture are adjusted to be consistent through the light plate and the light plate marks on the wafer picture. The directions are adjusted to be consistent, so that the accuracy of aligning the target wafer and the wafer map can be ensured.

Optionally, in this embodiment, the number of the light panels is not limited. A light panel may be provided on one or more sides of the target wafer. The size and shape of the optical plate can be different, so that the direction of the target wafer and the direction of the wafer graph can be adjusted more quickly and accurately.

As an alternative example, after aligning the target wafer and the wafer map, packaging good chips in the target wafer according to good chip marks in the wafer map includes:

taking down chips marked as good chips in a corresponding wafer graph in the target wafer from the blue film;

and keeping chips marked as special chips, edge chips or non-good chips in the corresponding wafer graph on the blue film in the target wafer.

Optionally, each chip in the target wafer in this embodiment is located on the blue film. When good chips are taken through the wafer map, the good chips are taken down from the blue film to be packaged, and special chips, edge chips and non-good chips are reserved on the blue film.

Optionally, in this embodiment, the wafer map may also be referred to as a wafer map. The wafer map is generally in txt or excel format, and is a file for identifying good products and defective products of a wafer after wafer testing, and is used for a packaging and core-loading process. The wafer map file includes wafer information descriptions such as wafer lot number, sheet number, good chip number, wafer dicing notch direction, etc. at the beginning, the text is wafer test condition, generally the character "1" indicates good chip, and the character "X" indicates bad chip.

Fig. 2 and fig. 3 are schematic circuit diagrams of a special chip of this embodiment. Fig. 4 is a schematic diagram of an alternative normal chip circuit. The special chip and the normal chip are different in circuit and have obvious difference in appearance. Therefore, it is possible to accurately identify which chips are special chips and which chips are normal chips. After the normal chip is detected, the chip can be determined to be a good chip or a non-good chip. And the good chip can be taken down from the blue film for core loading. And the non-good chips are remained on the blue film. FIG. 5 shows a wafer with a specific chip in a portion of the wafer, which can be used as a top-chip reference point. The special chip is inconsistent with the circuit of other chips in appearance and used for identification. FIG. 6 is an output map file corresponding to the wafer of FIG. 5, where "E" represents a special die and "W" represents an edge die. 1 denotes a good chip, and X denotes a non-good chip. Fig. 7 includes regular chips in a fixed position of a wafer, such as a multi-target wafer. Fig. 8 and 9 show light panels on both sides or fixed side of the wafer, and this part of the area has no circuit and can be used as the upper core reference point.

The flat edge or the unfilled corner (notch) of the wafer can determine the direction of the wafer, but the direction is only depended on, and then the map only containing two BINs of '1' and 'X' is combined with the interference of the edge chip of the wafer, so that the number of the wafer real objects is not always consistent with the number of the maps, and positioning deviation is easily generated among the machine table, the real objects and the maps when the chips are packaged, and the chip taking error is caused. Therefore, in order to ensure the accuracy of the core loading, not only the wafer real object needs to be improved, but also the wafer CP test needs to make a corresponding rule to ensure the integrity of the map.

In the wafer design, the wafer appearance needs to have individual special chips or regular chips as the reference points for the chips, and the chips are different from the normal chips, and the inconsistency, such as the pattern-cut chips, the multi-target chips and the like in the wafer flow process can be clearly distinguished in appearance no matter on a machine or visual inspection, as shown in the wafer circuit comparison schematic diagrams of fig. 3 and 4. The specific method comprises the following steps: the patterned chips reserved for monitoring or testing in the wafer flow process are generally distributed in different areas of the wafer, as shown in fig. 5, and the specific chips are distributed in the wafer. If the wafer is a multi-target chip, the special chips are regularly distributed at the wafer-fixing positions, as shown in FIG. 7. In fig. 8 and 9, the wafer is shown with optical plates (without circuitry) on either end or side.

When the map output rule is standardized, and chip wafer CP tests with edge chips, special chips, regular chips and the like which can be used as reference points distinguish bad chips 'X', and use other BINs, such as '2', 'E' or 'F', and the like. A special chip is denoted by E in fig. 6.

The core loading process is as follows: the machine station retrieves the map file corresponding to the wafer lot. The equipment automatically checks the reference point, confirms the current reference point of the map according to the map reference point and the real reference point of the equipment, confirms whether the reference point is consistent with the real reference point or not, and prints ink dots on the reference point after no abnormity occurs.

And moving the cursor of the equipment, randomly selecting a check point on the left side, the right side or the upper side and the lower side of the wafer, confirming whether the map corresponds to the wafer real object position, printing an ink point on the upper chip after the starting point is confirmed to be abnormal, and starting production after the starting point is confirmed to be correct. If the error is confirmed, the map or the wafer position is moved to align the two.

In this embodiment, after the reference point and the map have different marks, the device can be distinguished from good products and bad products of the wafer according to the inconsistent place, and the reference point cannot be grabbed and used by the device, and always exists on the blue film, so that the device can be used for the chip loading requirement of secondary or multiple chip loading of the wafer. In summary, in the embodiment, the wafer and the map are improved at the same time, so that the problem of wafer map slice-taking error can be fundamentally solved.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.

According to another aspect of the embodiments of the present application, there is also provided an upper core device of a wafer, as shown in fig. 10, including:

an obtaining unit 1002, configured to obtain a target wafer to be subjected to core loading and a wafer map of the target wafer, where the wafer map includes a mark of a chip in the target wafer;

an alignment unit 1004 for aligning the target wafer with the wafer map according to the specific chip mark and/or the edge chip mark in the wafer map;

and a packaging unit 1006, configured to package good chips in the target wafer according to the good chip flag in the wafer map after aligning the target wafer and the wafer map.

Optionally, in this embodiment, in the process of mounting the target wafer, after the target wafer is obtained, the target wafer may be aligned with the wafer map, and then, in the aligned target wafer and the wafer map, if a good chip is marked on the wafer map, it is described that the chip on the corresponding target wafer is a good chip, and the good chip is packaged and mounted.

In this embodiment, a special chip and an edge chip may be mounted on the target wafer. The special chips may be randomly distributed or regularly distributed on the target wafer. The edge chip is located at the edge position of the target wafer. After the corresponding wafer map is obtained, good chips, non-good chips, special chip marks and edge chip marks are marked on the chips on the target wafer in the wafer map, and the chips correspond to various chips on the target wafer. And extracting good chips from the target wafer through the marks of the good chips.

In this embodiment, the target wafer and the wafer map can be aligned through the special chip and the edge chip on the target wafer and the special chip mark and the edge chip mark in the wafer map, so that a good chip can be obtained from the target wafer according to the aligned target wafer and the aligned wafer map and the mark of the good chip on the wafer map, and the accuracy of chip mounting on the wafer is improved.

As an alternative example, the alignment unit includes:

the alignment module is used for determining that the target wafer is aligned with the wafer map under the condition that the chip on the target wafer corresponding to the special chip mark is the special chip; or determining that the target wafer is aligned with the wafer map under the condition that the chip on the target wafer corresponding to the edge chip mark is the edge chip; or determining that the target wafer is aligned with the wafer map under the condition that the chip on the target wafer corresponding to the special chip mark is the special chip and the chip on the target wafer corresponding to the edge chip mark is the edge chip.

Optionally, in this embodiment, when aligning the target wafer and the wafer map, the alignment may be performed according to a special chip, or the alignment may be performed according to an edge chip, or the special chip and the edge chip are used together for alignment.

If the special chip is used for alignment, the position of the special chip is determined on the wafer, the position of the mark of the special chip is determined on the wafer map, and the two positions are aligned, so that the target wafer and the wafer map can be aligned. If there are more than one special chip, there are more than one corresponding special chip mark. And aligning each special chip with the special chip mark, and aligning the target wafer with the wafer map.

If the edge chips are used for alignment, the edge positions on the wafer comprise a plurality of edge chips, the wafer graph is marked with edge chip marks, the edge chips and the edge chip marks are aligned, and the target wafer is aligned with the wafer graph.

Through the embodiment, the target wafer and the wafer map can be aligned, good chips of the target wafer are extracted according to the wafer map, and the accuracy of chip mounting on the wafer is improved.

As an optional example, the apparatus further includes:

the selection unit is used for selecting a plurality of target positions on a target wafer before acquiring the target wafer to be cored and a wafer map of the target wafer;

and the setting unit is used for setting the special chip at the target position and setting the edge chip at the edge position of the target wafer.

Alternatively, in this embodiment, the special chip may include one or more chips. The location of a particular chip may be a randomly selected location on the target wafer. For example, the center of the target wafer may be selected to set a specific chip. If the number of the special chips is multiple, the special chips can be randomly arranged at different positions of the target wafer. And edge chips can be arranged at the edge position of the target wafer. The edge chips and good chips/non-good chips are the same and can be marked with edge chip marks on the wafer map.

Through the embodiment, the target wafer and the wafer map can be accurately aligned through the special chip and the edge chip, and the accuracy of chip mounting on the wafer is improved.

As an optional example, the apparatus further includes: the plurality of target locations are regularly distributed on the target wafer.

Optionally, in this embodiment, the positions of the specific chips on the target wafer may be regularly distributed. Such as up/down/left/right N chips per special chip or special chips. N is a positive integer. The special chips in regular distribution can ensure the accuracy of aligning the target wafer and the wafer map.

As an optional example, the apparatus further includes:

and the adjusting unit is used for adjusting the directions of the target wafer and the wafer map to be consistent according to the direction of the optical plate of the target wafer and the direction of the optical plate in the wafer map before aligning the target wafer and the wafer map according to the special chip mark and/or the edge chip mark in the wafer map.

Optionally, in this embodiment, a light plate may be disposed on the target wafer, and the light plate does not include any chip. A light plate can be arranged on one side of the target wafer, and the directions of the target wafer and the wafer picture are adjusted to be consistent through the light plate and the light plate marks on the wafer picture. The directions are adjusted to be consistent, so that the accuracy of aligning the target wafer and the wafer map can be ensured.

Optionally, in this embodiment, the number of the light panels is not limited. A light panel may be provided on one or more sides of the target wafer. The size and shape of the optical plate can be different, so that the direction of the target wafer and the direction of the wafer graph can be adjusted more quickly and accurately.

As an alternative example, the encapsulation unit includes:

the processing module is used for taking down chips marked as good chips in the corresponding wafer graph from the blue film in the target wafer; and keeping chips marked as special chips, edge chips or non-good chips in the corresponding wafer graph on the blue film in the target wafer.

Optionally, each chip in the target wafer in this embodiment is located on the blue film. When good chips are taken through the wafer map, the good chips are taken down from the blue film to be packaged, and special chips, edge chips and non-good chips are reserved on the blue film.

For other examples of this embodiment, please refer to the above examples, which are not described herein.

According to another aspect of the embodiments of the present invention, there is also provided an electronic device for implementing the above-mentioned core-on-wafer method, which may include a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the steps of the above-mentioned core-on-wafer method through the computer program.

According to a further aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of the above-mentioned on-wafer core-loading method when running.

Alternatively, in this embodiment, a person skilled in the art may understand that all or part of the steps in the methods of the foregoing embodiments may be implemented by a program instructing hardware associated with the terminal device, where the program may be stored in a computer-readable storage medium, and the storage medium may include: flash disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

The integrated unit in the above embodiments, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in the above computer-readable storage medium. Based on such understanding, the technical solution of the present invention may be substantially or partially implemented in the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, and including instructions for causing one or more computer devices (which may be personal computers, servers, or network devices) to execute all or part of the steps of the method according to the embodiments of the present invention.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed client may be implemented in other manners. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.