Semiconductor package
阅读说明:本技术 半导体封装件 (Semiconductor package ) 是由 金雄来 高福林 金起业 李釉钟 于 2018-12-12 设计创作,主要内容包括:半导体封装件包括第一半导体芯片和第二半导体芯片。第一半导体芯片具有位于第一半导体芯片的第一区域处的第一焊盘区域和位于第一半导体芯片的第二区域处的第二焊盘区域。第二半导体芯片具有位于第二半导体芯片的第一区域的第三焊盘区域和位于第二半导体芯片的第二区域的第四焊盘区域。第二半导体芯片层叠在第一半导体芯片上,以在第一横向方向上相对于第一半导体芯片偏移。(The semiconductor package includes a first semiconductor chip and a second semiconductor chip. The first semiconductor chip has a first pad region located at a first region of the first semiconductor chip and a second pad region located at a second region of the first semiconductor chip. The second semiconductor chip has a third pad region located at the first region of the second semiconductor chip and a fourth pad region located at the second region of the second semiconductor chip. The second semiconductor chip is stacked on the first semiconductor chip so as to be offset in the first lateral direction with respect to the first semiconductor chip.)
1. A semiconductor package, comprising:
a first semiconductor chip having a first pad region located in a first region of the first semiconductor chip and a second pad region located in a second region of the first semiconductor chip; and
a second semiconductor chip having a third pad region located at a first region of the second semiconductor chip and a fourth pad region located at a second region of the second semiconductor chip,
wherein the second semiconductor chip is stacked on the first semiconductor chip and is offset from the first semiconductor chip in a horizontal direction.
2. The semiconductor package according to claim 1, wherein the first semiconductor chip and the second semiconductor chip are vertically stacked in a zigzag manner to expose the first pad region, the second pad region, the third pad region, and the fourth pad region.
3. The semiconductor package according to claim 1, wherein,
wherein the first region of the first semiconductor chip is a first edge region of the first semiconductor chip;
wherein the second region of the first semiconductor chip is a second edge region adjacent to the first edge region of the first semiconductor chip;
wherein the first region of the second semiconductor chip is a first edge region of the second semiconductor chip; and
wherein the second region of the second semiconductor chip is a second edge region adjacent to the first edge region of the second semiconductor chip.
4. The semiconductor package according to claim 1, wherein,
wherein the first pad region is provided to extend in a first direction, and the second pad region is provided to extend in a second direction that intersects the first direction; and
wherein the third pad region is disposed to extend in the first direction, and the fourth pad region is disposed to extend in the second direction.
5. The semiconductor package according to claim 1, wherein,
wherein the first pad region and the third pad region are point-symmetric with respect to a center point of the first semiconductor chip and the second semiconductor chip; and
wherein the second pad region and the fourth pad region are point-symmetric with respect to a center point of the first semiconductor chip and the second semiconductor chip.
6. The semiconductor package according to claim 1, wherein the first semiconductor chip comprises:
a first control circuit disposed adjacent to the first pad region; configured to decode the command to generate a first write signal and a first read signal; configured to decode the address to generate a first selection address and a second selection address and a first bank group address to a fourth bank group address; and configured to receive or output data;
a first storage region located at a side of the first control circuit facing away from the first pad region and configured to include first to fourth bank groups activated according to the first to fourth bank group addresses if the first selection address is enabled; and
a second storage region located at a side of the first control circuit facing away from the first pad region and configured to include fifth to eighth bank groups activated according to the first to fourth bank group addresses if the second selection address is enabled.
7. The semiconductor package according to claim 6,
wherein the first through eighth bank groups are arranged in a second horizontal direction of the first and second storage regions; and
wherein a plurality of memory banks included in each of the first to eighth memory bank groups are arranged in a first horizontal direction of the first or second memory area.
8. The semiconductor package according to claim 6, wherein the first storage region and the second storage region are disposed adjacent to each other.
9. The semiconductor package according to claim 6, wherein the first to eighth bank groups are configured to receive or output the data through first to eighth input/output lines, respectively.
10. The semiconductor package according to claim 1, wherein the second semiconductor chip comprises:
a second control circuit disposed adjacent to the third pad region; configured to decode the command to generate a second write signal and a second read signal; configured to decode the addresses to generate third and fourth selection addresses and fifth to eighth bank group addresses; and configured to receive or output data;
a third memory region located at a side of the second control circuit facing away from the third pad region and configured to include ninth to twelfth bank groups activated according to the fifth to eighth bank group addresses if the third selection address is enabled; and
a fourth memory region located at a side of the second control circuit facing away from the third pad region and configured to include thirteenth through sixteenth bank groups activated according to the fifth through eighth bank group addresses if the fourth selection address is enabled.
11. The semiconductor package according to claim 10, wherein,
wherein the ninth through sixteenth bank groups are arranged in a second horizontal direction of the third and fourth storage regions; and
wherein a plurality of memory banks included in each of the ninth through sixteenth memory bank groups are arranged in the first horizontal direction of the third or fourth memory area.
12. The semiconductor package according to claim 10, wherein the third and fourth storage regions are disposed adjacent to each other.
13. The semiconductor package according to claim 10, wherein the ninth to sixteenth bank groups are configured to receive or output the data through ninth to sixteenth input/output (I/O) lines, respectively.
14. A semiconductor package, comprising:
a first semiconductor chip configured to include a first pad region extending in a first direction and a second pad region extending in a second direction, the second direction intersecting the first direction; configured to receive commands and addresses through the first pad region; and configured to receive or output data through the first pad region;
a second semiconductor chip configured to include a third pad region extending in the first direction and a fourth pad region extending in the second direction; configured to receive commands and addresses through the third pad region; and configured to receive or output data through the third pad region;
a third semiconductor chip configured to include a fifth pad region extending in the first direction and a sixth pad region extending in the second direction; configured to receive commands and addresses through the fifth pad region; and configured to receive or output data through the fifth pad region; and
a fourth semiconductor chip configured to include a seventh pad region extending in the first direction and an eighth pad region extending in the second direction; configured to receive commands and addresses through the seventh pad region; and configured to receive or output data through the seventh pad region,
wherein the second semiconductor chip, the third semiconductor chip, and the fourth semiconductor chip are sequentially and vertically stacked on the first semiconductor chip in a zigzag manner.
15. The semiconductor package according to claim 14, wherein,
wherein the second semiconductor chip is offset in a first lateral direction relative to the first semiconductor chip;
wherein the third semiconductor chip is offset relative to the second semiconductor chip in a second lateral direction opposite the first lateral direction; and
wherein the fourth semiconductor chip is offset in the first lateral direction relative to the third semiconductor chip.
16. The semiconductor package according to claim 14, wherein,
wherein the second and fourth semiconductor chips are offset in a first lateral direction relative to the first and third semiconductor chips; and
wherein the first and third semiconductor chips are offset relative to the second and fourth semiconductor chips in a second lateral direction opposite the first lateral direction.
17. The semiconductor package according to claim 14, wherein the second semiconductor chip, the third semiconductor chip, and the fourth semiconductor chip are stacked on the first semiconductor chip in a zigzag manner to expose the first to eighth pad regions.
18. The semiconductor package according to claim 14, wherein,
wherein the first pad region is located at a first edge region of the first semiconductor chip, and the second pad region is located at a second edge region of the first semiconductor chip adjacent to the first edge region of the first semiconductor chip;
wherein the third pad region is located at a first edge region of the second semiconductor chip, and the fourth pad region is located at a second edge region of the second semiconductor chip adjacent to the first edge region of the second semiconductor chip;
wherein the fifth pad region is located at a first edge region of the third semiconductor chip, and the sixth pad region is located at a second edge region of the third semiconductor chip adjacent to the first edge region of the third semiconductor chip; and
wherein the seventh pad region is located at a first edge region of the fourth semiconductor chip, and the eighth pad region is located at a second edge region of the fourth semiconductor chip adjacent to the first edge region of the fourth semiconductor chip.
19. The semiconductor package according to claim 14, wherein the first semiconductor chip further comprises:
a first control circuit disposed adjacent to the first pad region; configured to decode the command to generate a first write signal and a first read signal; configured to decode the addresses to generate first and second selection addresses and first to fourth bank group addresses; and configured to receive or output the data;
a first storage region located at a side of the first control circuit facing away from the first pad region and configured to include first to fourth bank groups activated according to the first to fourth bank group addresses if the first selection address is enabled; and
a second storage region located at a side of the first control circuit facing away from the first pad region and configured to include fifth to eighth bank groups activated according to the first to fourth bank group addresses if the second selection address is enabled.
20. The semiconductor package according to claim 14, wherein the second semiconductor chip further comprises:
a second control circuit disposed adjacent to the third pad region; configured to decode the command to generate a second write signal and a second read signal; configured to decode the addresses to generate third and fourth selection addresses and fifth to eighth bank group addresses; and configured to receive or output the data;
a third memory region located at a side of the second control circuit facing away from the third pad region and configured to include ninth to twelfth bank groups activated according to the fifth to eighth bank group addresses if the third selection address is enabled; and
a fourth memory region located at a side of the second control circuit facing away from the third pad region and configured to include thirteenth through sixteenth bank groups activated according to the fifth through eighth bank group addresses if the fourth selection address is enabled.
21. The semiconductor package according to claim 14, wherein the third semiconductor chip further comprises:
a third control circuit disposed adjacent to the fifth pad region; configured to decode the command to generate a third write signal and a third read signal; configured to decode the addresses to generate fifth and sixth selection addresses and ninth to twelfth bank group addresses; and configured to receive or output the data;
a fifth memory region located on a side of the third control circuit opposite to the fifth pad region and configured to include seventeenth to twentieth bank groups activated according to the ninth to twelfth bank group addresses if the fifth selection address is enabled; and
a sixth storage region located on a side of the third control circuit opposite to the fifth pad region and configured to include twenty-first to twenty-fourth bank groups activated according to the ninth to twelfth bank group addresses if the sixth selection address is enabled.
22. The semiconductor package according to claim 14, wherein the fourth semiconductor chip further comprises:
a fourth control circuit disposed adjacent to the seventh pad region; configured to decode the command to generate a fourth write signal and a fourth read signal; configured to decode the addresses to generate seventh and eighth select addresses and thirteenth to sixteenth bank group addresses; and configured to receive or output the data;
a seventh storage region located at a side of the fourth control circuit facing away from the seventh pad region and configured to include twenty-fifth to twenty-eighth bank groups activated according to the thirteenth to sixteenth bank group addresses if the seventh selection address is enabled; and
an eighth storage region located at a side of the fourth control circuit facing away from the seventh pad region and configured to include twenty-ninth to thirty-second bank groups activated according to the thirteenth to sixteenth bank group addresses if an eighth selection address is enabled.
Technical Field
Embodiments of the present disclosure generally relate to a semiconductor package including a plurality of semiconductor chips stacked vertically.
Background
In general, each semiconductor device such as a Dynamic Random Access Memory (DRAM) apparatus may include a plurality of bank groups composed of a cell array selected by an address. Each bank group may be implemented to include a plurality of banks. The semiconductor device may select any one of a plurality of bank groups, and may perform a column operation for outputting data stored in a cell array included in the selected bank group through an input/output (I/O) line. Semiconductor devices (also referred to as semiconductor chips) may be vertically stacked on a package substrate and may be packaged with a molding layer to provide a semiconductor package. Recently, various techniques for stacking semiconductor chips have been proposed to improve the performance of semiconductor packages.
Fig. 1 is a sectional view illustrating a conventional semiconductor package including a plurality of semiconductor chips vertically stacked.
Referring to fig. 1, a conventional semiconductor package may include first to
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In the conventional semiconductor package shown in fig. 1, since there are wires W provided to electrically connect the first to
Disclosure of Invention
According to an embodiment, a semiconductor package may include a first semiconductor chip and a second semiconductor chip. The first semiconductor chip may have a first pad region located at a first region of the first semiconductor chip and a second pad region located at a second region of the first semiconductor chip. The second semiconductor chip may have a third pad region located at the first region of the second semiconductor chip and a fourth pad region located at the second region of the second semiconductor chip. The second semiconductor chip may be stacked on the first semiconductor chip so as to be offset with respect to the first semiconductor chip in the first lateral direction.
According to an embodiment, a semiconductor package may include a first semiconductor chip, a second semiconductor chip, a third semiconductor chip, and a fourth semiconductor chip. The first semiconductor chip may be configured to include a first pad region extending in a first direction and a second pad region extending in a second direction intersecting the first direction, to receive commands and addresses through the first pad region, and to receive or output data through the first pad region. The second semiconductor chip may be configured to include a third pad region extending in the first direction and a second pad region extending in the second direction, to receive a command and an address through the third pad region, and to receive or output data through the third pad region. The third semiconductor chip may be configured to include a fifth pad region extending in the first direction and a sixth pad region extending in the second direction, to receive a command and an address through the fifth pad region, and to receive or output data through the fifth pad region. The fourth semiconductor chip may be configured to include a seventh pad region extending in the first direction and an eighth pad region extending in the second direction, to receive a command and an address through the seventh pad region, and to receive or output data through the seventh pad region. The second semiconductor chip, the third semiconductor chip, and the fourth semiconductor chip may be sequentially and vertically stacked on the first semiconductor chip in a zigzag manner.
Drawings
Fig. 1 is a sectional view showing the structure of a conventional semiconductor package.
Fig. 2 is a sectional view illustrating a structure of a semiconductor package according to an embodiment of the present disclosure.
Fig. 3 is a plan view illustrating a structure of a first semiconductor chip included in the semiconductor package of fig. 2.
Fig. 4 is a plan view illustrating a structure of a second semiconductor chip included in the semiconductor package of fig. 2.
Fig. 5 is a block diagram illustrating a structure of a first memory region included in the first semiconductor chip of fig. 3.
Fig. 6 is a block diagram illustrating a structure of a second memory region included in the first semiconductor chip of fig. 3.
Fig. 7 is a plan view illustrating a stacked state of a first semiconductor chip and a second semiconductor chip included in a semiconductor package according to an embodiment of the present disclosure.
Fig. 8 is a block diagram illustrating a structure of an electronic system including the semiconductor package shown in fig. 1 to 7.
Detailed Description
Various embodiments of the present disclosure will be described below with reference to the accompanying drawings. However, the embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure.
As shown in fig. 2, the
The substrate SUB may include a plurality of solder balls SB. The substrate SUB may receive a signal from an external device through the solder balls SB or may output a signal to an external device through the solder balls SB.
The first semiconductor CHIP1 may be stacked on a surface of the substrate SUB. The first semiconductor CHIP1 may include a first body and a first pad P1, the first pad P1 being disposed on a top surface of the first body facing away from the substrate SUB. The first pad P1 may be electrically connected to the substrate SUB by a first wire W1. Accordingly, the first semiconductor CHIP1 may receive a signal from the substrate SUB or may output a signal to the substrate SUB through the first pad P1 and the first wire W1.
A second semiconductor CHIP2 may be stacked on the top surface of the first semiconductor CHIP1 facing away from the substrate SUB. The second semiconductor CHIP2 may include a second body and a second pad P2, the second pad P2 being disposed on a top surface of the second body facing away from the first semiconductor CHIP 1. The second pad P2 may be electrically connected to the substrate SUB by a second wire W2. Accordingly, the second semiconductor CHIP2 may receive a signal from the substrate SUB or may output a signal to the substrate SUB through the second pad P2 and the second wire W2.
A third semiconductor CHIP3 may be stacked on the top surface of the second semiconductor CHIP2 facing away from the first semiconductor CHIP 1. The third semiconductor CHIP3 may include a third body and third pads P3, the third pads P3 being disposed on a top surface of the third body facing away from the second semiconductor CHIP 2. The third pad P3 may be electrically connected to the substrate SUB by a third wire W3. Accordingly, the third semiconductor CHIP3 may receive a signal from the substrate SUB or may output a signal to the substrate SUB through the third pad P3 and the third wire W3.
A fourth semiconductor CHIP4 may be stacked on a top surface of the third semiconductor CHIP3 facing away from the second semiconductor CHIP 2. The fourth semiconductor CHIP4 may include a fourth body and fourth pads P4, the fourth pads P4 being disposed on a top surface of the fourth body facing away from the third semiconductor CHIP 3. The fourth pad P4 may be electrically connected to the substrate SUB by a fourth wire W4. Accordingly, the fourth semiconductor CHIP4 may receive a signal from the substrate SUB or may output a signal to the substrate SUB through the fourth pad P4 and the fourth wire W4.
The first to fourth semiconductor CHIPs CHIP1, CHIP2, CHIP3, and CHIP4 may be vertically stacked on the substrate SUB in a zigzag manner to expose the first to fourth pads P1, P2, P3, and P4 disposed on the edges of the first to fourth bodies of the first to fourth semiconductor CHIPs CHIP1, CHIP2, CHIP3, and
For example, the second semiconductor CHIP2 may be rotated 180 degrees using the first semiconductor CHIP1 as a reference CHIP in a plan view, and the rotated second semiconductor CHIP2 may be stacked on the first semiconductor CHIP1 to be laterally shifted with respect to the first semiconductor CHIP1 such that the first pad P1 of the first semiconductor CHIP1 is exposed. In a plan view, the third semiconductor CHIP3 may be rotated 180 degrees using the second semiconductor CHIP2 as a reference CHIP, and the rotated third semiconductor CHIP3 may be stacked on the second semiconductor CHIP2 to be laterally offset with respect to the second semiconductor CHIP2 such that the second pads P2 of the second semiconductor CHIP2 are exposed. In a plan view, the fourth semiconductor CHIP4 may be rotated 180 degrees using the third semiconductor CHIP3 as a reference CHIP, and the rotated fourth semiconductor CHIP4 may be stacked on the third semiconductor CHIP3 to be laterally offset with respect to the third semiconductor CHIP3 such that the third pads P3 of the third semiconductor CHIP3 are exposed. That is, the second semiconductor CHIP2 may be stacked to be shifted in a first shift direction with respect to the first semiconductor CHIP1 to provide a space for bonding the first conductive wire W1 to the first pad P1, and the third semiconductor CHIP3 may be stacked to be shifted in a second shift direction opposite to the first shift direction with respect to the second semiconductor CHIP2 to provide a space for bonding the second conductive wire W2 to the second pad P2. In addition, the fourth semiconductor CHIP4 may be stacked to be offset in the first offset direction with respect to the third semiconductor CHIP3 to provide a space for bonding the third wire W3 to the third pad P3. Accordingly, the first to fourth semiconductor CHIPs CHIP1, CHIP2, CHIP3, and CHIP4 may be vertically stacked on the substrate SUB in a zigzag manner to expose the first to fourth pads P1, P2, P3, and P4.
Referring to fig. 3, the first semiconductor CHIP1 may include a
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According to an embodiment, signals transmitted through the first and
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The first semiconductor CHIP1 may provide a bank group mode, an 8 bank mode, and a 16 bank mode. The bank group may include a plurality of banks. For example, a bank group may include four banks. In the bank group mode, a column operation of one bank included in the bank group may be performed by one command. In the 8-bank mode, column operations of two banks respectively included in two independent bank groups are sequentially performed by one command. In the 16-bank mode, column operations of four banks respectively included in four independent bank groups are sequentially performed by one command.
In the 8-bank mode, the
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If the first selection address SA <1> is enabled in the 8 bank mode, the
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If the second selection address SA <2> is enabled in the 8 bank mode, the
The first and
Referring to fig. 4, the second semiconductor CHIP2 may include a
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According to an embodiment, signals transmitted through the third and
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The third storage area 240 may be located at a side of the
The third memory region 240 may include ninth through twelfth bank groups (not shown) that are activated according to fifth through eighth bank group addresses BGA <5:8> if the third selection address SA <3> is enabled. The ninth to twelfth bank groups (not shown) may include thirty-third to forty-eighth banks (not shown) that are activated according to the fifth to eighth bank addresses BKA <5:8 >.
The third storage area 240 may be implemented to have substantially the same structure as the
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Referring to fig. 5, the
The first bank group BG1 may include first to fourth banks BK1, BK2, BK3, and
The first bank BK1 may be activated if the first selection address SA <1>, the first bank group address BGA <1>, and the first bank address BKA <1> are enabled. The second bank BK2 may be activated if the first selection address SA <1>, the first bank group address BGA <1>, and the second bank address BKA <2> are enabled. The third bank BK3 may be activated if the first selection address SA <1>, the first bank group address BGA <1>, and the third bank address BKA <3> are enabled. The fourth bank BK4 may be activated if the first selection address SA <1>, the first bank group address BGA <1>, and the fourth bank address BKA <4> are enabled. The first to fourth banks BK1, BK2, BK3 and BK4 may share the first I/O line IO1 with each other, and may receive or output DATA through the first I/
The second bank group BG2 may include fifth to eighth banks BK5, BK6, BK7, and
If the second bank group address BGA <2> is enabled, the second bank group BG2 may be activated, and the fifth to eighth banks BK5, BK6, BK7 and BK8 may share the second I/O line IO2 with each other so as to receive or output DATA through the second I/
The third bank group BG3 may include ninth to twelfth banks BK9, BK10, BK11, and BK 12.
If the third bank group address BGA <3> is enabled, the third bank group BG3 may be activated, and the ninth to twelfth banks BK9, BK10, BK11 and BK12 may share the third I/O line IO3 with each other so as to receive or output the DATA through the third I/
The fourth bank group BG4 may include thirteenth to sixteenth banks BK13, BK14, BK15, and BK 16.
If the fourth bank group address BGA <4> is enabled, the fourth bank group BG4 may be activated, and the thirteenth to sixteenth banks BK13, BK14, BK15, and BK16 may share the fourth I/O line IO4 with each other so as to receive or output DATA DATA through the fourth I/
The
The first to fourth bank groups BG1, BG2, BG3 and BG4 may be arranged in a second horizontal direction of the
Referring to fig. 6, the
The fifth bank group BG5 may include seventeenth to twentieth banks BK17, BK18, BK19, and BK 20.
If the second selection address SA <2>, the first bank group address BGA <1>, and the first bank address BKA <1> are enabled, a seventeenth BK17 may be activated. If the second selection address SA <2>, the first bank group address BGA <1>, and the second bank address BKA <2> are enabled, the eighteenth bank BK18 may be activated. The nineteenth bank BK19 may be activated if the second selection address SA <2>, the first bank group address BGA <1>, and the third bank address BKA <3> are enabled. The twentieth bank BK20 may be activated if the second selection address SA <2>, the first bank group address BGA <1>, and the fourth bank address BKA <4> are enabled. The seventeenth to twentieth banks BK17, BK18, BK19 and BK20 may share the fifth I/O line IO5 with each other, and may receive or output DATA through the fifth I/
The sixth bank group BG6 may include twenty-first to twenty-fourth banks BK21, BK22, BK23, and BK 24.
If the second bank group address BGA <2> is enabled, the sixth bank group BG6 may be activated, and the twenty-first to twenty-fourth banks BK21, BK22, BK23, and BK24 may share the sixth I/O line IO6 with each other to receive or output DATA DATA through the sixth I/O line IO 6. The twenty-first to twenty-fourth banks BK21, BK22, BK23 and BK24 may be configured to perform substantially the same operations as the seventeenth to twentieth banks BK17, BK18, BK19 and BK 20. Therefore, a description of the sixth bank group BG6 will be omitted hereinafter.
The seventh bank group BG7 may include twenty-fifth to twenty-eighth banks BK25, BK26, BK27, and BK 28.
If the third bank group address BGA <3> is enabled, the seventh bank group BG7 may be activated, and the twenty-fifth to twenty-eighth banks BK25, BK26, BK27, and BK28 may share the seventh I/O line IO7 with each other to receive or output DATA DATA through the seventh I/O line IO 7. The twenty-fifth to twenty-eighth banks BK25, BK26, BK27 and BK28 may be configured to perform substantially the same operations as the seventeenth to twentieth banks BK17, BK18, BK19 and BK 20. Therefore, a description of the seventh bank group BG7 will be omitted hereinafter.
The eighth bank group BG8 may include twenty ninth to thirty second banks BK29, BK30, BK31, and BK 32.
If the fourth bank group address BGA <4> is enabled, the eighth bank group BG8 may be activated, and the twenty-ninth to thirty-second banks BK29, BK30, BK31, and BK32 may share the eighth I/O line IO8 with each other to receive or output the DATA DATA through the eighth I/
The
The fifth to eighth bank groups BG5, BG6, BG7 and BG8 may be arranged in the second horizontal direction of the
The memory region included in each of the second, third and fourth semiconductor CHIPs CHIP2, CHIP3 and CHIP4 may be implemented to perform substantially the same operation as the
A stacked structure of the first semiconductor CHIP1 and the second semiconductor CHIP2 included in the
The first semiconductor CHIP1 may be stacked on the substrate SUB such that the
The second semiconductor CHIP2 may be stacked on the first semiconductor CHIP1 such that the
As described above, the second semiconductor CHIP2 may be stacked on the first semiconductor CHIP1 so as to be laterally offset in a first direction (i.e., a first lateral direction). In this case, although not shown in fig. 7, the third semiconductor CHIP3 may be stacked on the second semiconductor CHIP2 to be laterally offset in a second direction (i.e., a second lateral direction) opposite to the first direction, such that the third and
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