WO2004075280A1 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- WO2004075280A1 WO2004075280A1 PCT/JP2004/001079 JP2004001079W WO2004075280A1 WO 2004075280 A1 WO2004075280 A1 WO 2004075280A1 JP 2004001079 W JP2004001079 W JP 2004001079W WO 2004075280 A1 WO2004075280 A1 WO 2004075280A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- functional
- semiconductor device
- area
- substrate
- region
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L24/81—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a bump connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/50—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor for integrated circuit devices, e.g. power bus, number of leads
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/10—Bump connectors ; Manufacturing methods related thereto
- H01L24/12—Structure, shape, material or disposition of the bump connectors prior to the connecting process
- H01L24/14—Structure, shape, material or disposition of the bump connectors prior to the connecting process of a plurality of bump connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/10—Bump connectors ; Manufacturing methods related thereto
- H01L24/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L24/17—Structure, shape, material or disposition of the bump connectors after the connecting process of a plurality of bump connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/81—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a bump connector
- H01L2224/818—Bonding techniques
- H01L2224/81801—Soldering or alloying
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01005—Boron [B]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01006—Carbon [C]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01033—Arsenic [As]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/013—Alloys
- H01L2924/014—Solder alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/301—Electrical effects
- H01L2924/30105—Capacitance
Definitions
- the present invention relates to a semiconductor device in which a substrate is provided with a first functional area including a memory area and the like, a second functional area including a drive circuit and the like, and electrodes for performing signal input / output between the outside and the field. . 1
- DRAM chip As a technology for connecting a chip (DRAM chip) on which a memory such as a DRAM (Dynamic Random Access Memory) or a drive circuit is formed to an external substrate, a method of fixing the chip by heating and pressing using solder bumps is known.
- a bump connection pad When a bump connection pad is placed on this DRAM chip, if it is placed directly above the DRAM cell, a load will be applied at the time of bump connection (assembly), causing problems such as damage to the DRAM cell array and deterioration of characteristics. Occurs.
- FIG. 8A and 8B are schematic diagrams illustrating a conventional semiconductor device, FIG. 8A is a plan view, and FIG. 8B is a cross-sectional view. That is, this semiconductor device has a configuration in which a substrate 10 having a DRAM chip or the like is connected via an bump B to an external substrate 20 made of an LSI such as a signal processing chip. In this case, the second functional area where other signal processing circuits and the like are formed avoiding the same surface in the DRAM cell array area (first functional area 1) formed on the DRAM chip.
- a bump connection pad and bump B are arranged in region 2.
- Patent Document 1 discloses a technique relating to the arrangement of bonding pads for connecting bonding wires.
- Patent Document 1 Japanese Patent Application Laid-Open No. H4-16-166264
- the bump connection pad and the bump are arranged so as to avoid the DRAM cell array area. Therefore, even when a load is applied via the bump when connecting the DRAM chip, the DRAM cell array is not used.
- the bump connection pads and bumps are located at separate positions, such as the left and right ends of the DRAM chip, the yield during bump connection (assembly) decreases. appear. In other words, even with a slight inclination of the DRAM chip, the load applied to the bumps arranged on both the left and right ends becomes large. For example, even if the bumps on one end are connected, the bumps on the other end are lifted. This makes it difficult to make a pressure connection, which leads to a reduction in product reliability. Disclosure of the invention
- the present invention has been made to solve such a problem.
- the present invention provides a semiconductor device in which a first functional region and a second functional region are provided on a substrate, when the substrate is viewed in a plan view, the circumscribed rectangle of the first functional region is smaller than the circumscribed rectangle of the first functional region.
- An electrode for inputting and outputting a signal to and from the outside is provided at a position overlapping the second functional region disposed inside.
- the electrodes are arranged at positions overlapping the second function area disposed inside the circumscribed rectangle of the first function area, the electrodes are arranged at substantially the center of the substrate as the arrangement of the electrodes. be able to. As a result, it is possible to prevent pressure during connection from being applied to the first functional area, and to perform pressurized connection with the external substrate via the electrodes without expanding the electrode arrangement area. And uniform connection to the electrodes can be made.
- FIGS. 1A and 1B are schematic diagrams illustrating a semiconductor device according to the first embodiment.
- FIGS. 2A and 2B are schematic diagrams illustrating a semiconductor device according to the second embodiment.
- FIG. 3 is a schematic plan view illustrating the semiconductor device according to the third embodiment.
- FIG. 4 is a schematic plan view illustrating a semiconductor device according to a fourth embodiment.
- FIG. 5 is a schematic plan view illustrating a semiconductor device according to a fifth embodiment.
- FIG. 6 is a schematic plan view illustrating the semiconductor device according to the sixth embodiment.
- FIG. 7 is a schematic plan view illustrating the semiconductor device according to the seventh embodiment.
- FIGS. 8A and 8B are schematic diagrams illustrating a conventional semiconductor device. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1A and 1B are schematic views illustrating a semiconductor device according to the first embodiment.
- FIG. 1A is a plan view
- FIG. 1B is a cross-sectional view. That is, this semiconductor device has a first functional area 1 and a second functional area 2 provided on a chip-shaped substrate 10.
- the first functional area 1 includes a DRAM cell array (storage element area), and the second functional area 2 includes a signal processing circuit and a driving circuit for the DRAM cell array.
- two first functional regions 1 (1a, 1b) are provided, and a region between them (a circumscribed rectangle when the first functional region 1 is viewed in plan). Area inside the second functional area 2).
- Bumps (metal protrusions) B which are electrodes for inputting and outputting signals, are provided.
- the semiconductor device is connected face-down to the external substrate 20 via the bumps B.
- the DRAM cell array which is the first functional area 1
- the bumps B are arranged at substantially the center of the substrate 10, the distance between the outermost bumps can be reduced as compared with the case where bumps are provided at the ends of the substrate 10. Can be uniformly connected to the external substrate 20 even if it is slightly inclined.
- FIG. 2A and 2B are schematic views illustrating a semiconductor device according to the second embodiment.
- FIG. 2A is a plan view and FIG. 2B is a cross-sectional view. That is, in this semiconductor device, of the first functional region 1 and the second functional region 2 provided on the chip-shaped substrate 10, four first functional regions 1 (la, lb, lc, ld)
- a plurality of bumps B are arranged in a cross shape in the second functional area 2 which is the area between them (the area inside the circumscribed rectangle when the first functional area 1 is viewed in plan). It was done.
- the semiconductor device is connected face-down to the external substrate 20 via the bumps B.
- the first functional area It is possible to provide the bump B avoiding directly above the DRAM cell array which is 1. Therefore, in the heating and pressurizing connection with the external substrate 20 via the bump B of the semiconductor device, the same operation and effect as in the previous example, that is, the low withstand pressure force from the bump B (the signal processing circuit and the driving circuit No pressure is applied to the DRAM cell array (first functional area 1), which has a lower pressure resistance than the functional area 2 of (2), so that damage to the DRAM cell array can be prevented.
- the distance between the wiring between each bump B and the first functional region 1 can be reduced as much as possible, in addition to the arrangement at the substantially central portion of the substrate 10. It is possible to suppress the signal delay.
- FIG. 3 is a schematic plan view illustrating a semiconductor device according to the third embodiment.
- This semiconductor device is an application example of the semiconductor device according to the second embodiment shown in FIGS. 2A and 2B, and includes a first functional region 1 and a second functional region 1 provided on a chip-shaped substrate 10.
- Out of the functional areas 2 six first functional areas 1 (1a, 1b, 1c, 1d, 1e, 1f) are provided, and the area between them (the first functional area 1 A plurality of bumps B are arranged in a continuous cross shape in the second functional area 2, which is the area inside the circumscribed rectangle when viewed in plan.
- any number of the first functional areas 1 may be provided, and the bump B is arranged at the position of the second functional area 2 between each of the first functional areas (for example, la to lf). By doing so, it is possible to achieve both the arrangement of the bumps at the approximate center of the substrate 10 and the reduction of the distance between the wirings between the bumps B and the first functional region 1.
- FIG. 4 is a schematic plan view illustrating a semiconductor device according to the fourth embodiment.
- This semiconductor device is an application example of the semiconductor device according to the second embodiment shown in FIG. 2, and includes a first functional region 1 and a second functional region 1 provided on a chip-shaped substrate 10.
- first functional areas 2 of the first four first functional areas (la, lb, lc, Id) are provided, and the area between them (the circumscribed rectangle when the first functional area 1 is viewed in a plan view)
- a plurality of bumps B are arranged in a rectangular shape in the second functional area 2 serving as an inner area.
- FIG. 5 is a schematic plan view illustrating a semiconductor device according to the fifth embodiment.
- This semiconductor device is an application example of the semiconductor device according to the fourth embodiment shown in FIG. 4, and includes a first functional region 1 and a second functional region 2 provided on a chip-shaped substrate 10.
- Four functional areas 1 (la, lb, lc, 1d) are provided, and the area between them (area inside the circumscribed rectangle when the first functional area 1 is viewed in plan)
- the bumps B are arranged in a rectangular shape in the second functional area 2.
- the first functional area 1 (1a to ld) is arranged in a partially cut-out state so as to surround a rectangular bump B arranged substantially in the center of the substrate 10. Have been. With such an arrangement, it is possible to increase the layout efficiency of the substrate 10 as well as to arrange the bumps in the substantially central portion of the substrate 10 and to reduce the distance between the wiring between each bump B and the first functional region 1. It becomes.
- FIG. 6 is a schematic plan view illustrating a semiconductor device according to the sixth embodiment.
- This semiconductor device is an application example of the semiconductor device according to the fifth embodiment shown in FIG. 5, and includes a first functional region 1 and a second functional region 2 provided on a chip-shaped substrate 10.
- Four functional areas 1 (la, lb, lc, 1d) are provided, and the area between them (area inside the circumscribed rectangle when the first functional area 1 is viewed in plan) Multiple buses in the second functional area 2
- the pump B is arranged in a rectangular shape.
- this embodiment is different from the other embodiments in that a part of the corner of the bump B overlaps a part of the first functional region 1. That is, the portion of the first functional area 1 that overlaps with the bump B is naturally subjected to pressure during connection. Therefore, a part of the first functional area 1 which receives the pressure from the bump B is set as an invalid area (a non-functional area) from the beginning of the design. As a result, the region of the bump B and the first functional region 1 can be brought closer to each other, and in addition to the effect of the semiconductor device according to the fifth embodiment, it is possible to further increase the rate efficiency.
- FIG. 7 is a schematic plan view illustrating a semiconductor device according to the seventh embodiment.
- a second functional region 2 is arranged in a state surrounded by a first functional region 1
- a bump B is arranged in a second functional region 2 surrounded by the first functional region 1. It is a thing. That is, the first functional region 1 is annularly continuous, and the second functional region 2 and the bump B are arranged in the central portion of the first functional region 1.
- the bumps B can be arranged at substantially the center of the substrate 10 and the wiring between each bump B and the first functional area 1 It is possible to reduce the inter-distance.
- the plurality of first functional areas 1 may be one in which one functional area is divided and arranged, or one in which a plurality of functional areas are arranged.
- the first functional area 1 may be composed of a DRAM cell array, it may be divided into a plurality of DRAM cell arrays so as to have a total of 256 Mbits (in this case, one divided DRAM cell array). Is equivalent to one of the first functional areas 1), and one first functional area 1 may be arranged in a 256 Mbit DRAM cell array (in this case, the first functional area 1). Number of area 1 X 2 5 6 Mbit total Capacity).
- the present invention is not limited to this, and may include a curved part such as a circle. Further, even if the electrode is other than the pump B, the same applies to other electrodes as long as they can be connected by pressurizing and heating. Industrial applicability
- the present invention has the following effects.
- the semiconductor device when the semiconductor device is connected to the external substrate by heating and pressing, the pressure via the electrodes is not applied to the first functional region, and it is possible to prevent damage to the first functional region.
- the electrodes are arranged in a substantially central portion of the substrate, a highly reliable device can be provided by uniform connection to the electrodes.
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Semiconductor Integrated Circuits (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Semiconductor Memories (AREA)
- Wire Bonding (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/543,592 US20060186403A1 (en) | 2003-02-19 | 2004-02-03 | Semiconductor device |
EP04707668A EP1608009A4 (en) | 2003-02-19 | 2004-02-03 | SEMICONDUCTOR DEVICE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-040730 | 2003-02-19 | ||
JP2003040730A JP2004265940A (ja) | 2003-02-19 | 2003-02-19 | 半導体装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004075280A1 true WO2004075280A1 (ja) | 2004-09-02 |
Family
ID=32905262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/001079 WO2004075280A1 (ja) | 2003-02-19 | 2004-02-03 | 半導体装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20060186403A1 (ja) |
EP (1) | EP1608009A4 (ja) |
JP (1) | JP2004265940A (ja) |
KR (1) | KR20050100663A (ja) |
TW (1) | TWI246132B (ja) |
WO (1) | WO2004075280A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009200101A (ja) * | 2008-02-19 | 2009-09-03 | Liquid Design Systems:Kk | 半導体チップ及び半導体装置 |
JP2009295740A (ja) * | 2008-06-04 | 2009-12-17 | Elpida Memory Inc | メモリチップ及び半導体装置 |
JP6963448B2 (ja) * | 2017-09-13 | 2021-11-10 | 太陽誘電株式会社 | 電子部品 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05343634A (ja) * | 1992-06-06 | 1993-12-24 | Hitachi Ltd | 半導体記憶装置 |
US5319224A (en) * | 1989-10-11 | 1994-06-07 | Mitsubishi Denki Kabushiki Kaisha | Integrated circuit device having a geometry to enhance fabrication and testing and manufacturing method thereof |
JPH0888253A (ja) * | 1994-09-16 | 1996-04-02 | Nippon Steel Corp | 半導体装置用端子接触装置 |
US5842628A (en) * | 1995-04-10 | 1998-12-01 | Fujitsu Limited | Wire bonding method, semiconductor device, capillary for wire bonding and ball bump forming method |
JP2002217298A (ja) * | 2001-01-19 | 2002-08-02 | Nec Kansai Ltd | 半導体ウエハ |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0752762B2 (ja) * | 1985-01-07 | 1995-06-05 | 株式会社日立製作所 | 半導体樹脂パッケージ |
US4731643A (en) * | 1985-10-21 | 1988-03-15 | International Business Machines Corporation | Logic-circuit layout for large-scale integrated circuits |
JP3383081B2 (ja) * | 1994-07-12 | 2003-03-04 | 三菱電機株式会社 | 陽極接合法を用いて製造した電子部品及び電子部品の製造方法 |
JP3494502B2 (ja) * | 1995-05-12 | 2004-02-09 | 株式会社ルネサステクノロジ | 半導体記憶装置およびそのパッド配置方法 |
JPH11214654A (ja) * | 1998-01-28 | 1999-08-06 | Mitsubishi Electric Corp | 半導体記憶装置 |
JP2000223657A (ja) * | 1999-02-03 | 2000-08-11 | Rohm Co Ltd | 半導体装置およびそれに用いる半導体チップ |
US6246121B1 (en) * | 1999-04-12 | 2001-06-12 | Vlsi Technology, Inc. | High performance flip-chip semiconductor device |
US20020180029A1 (en) * | 2001-04-25 | 2002-12-05 | Hideki Higashitani | Semiconductor device with intermediate connector |
-
2003
- 2003-02-19 JP JP2003040730A patent/JP2004265940A/ja active Pending
-
2004
- 2004-02-03 EP EP04707668A patent/EP1608009A4/en not_active Withdrawn
- 2004-02-03 US US10/543,592 patent/US20060186403A1/en not_active Abandoned
- 2004-02-03 KR KR1020057014633A patent/KR20050100663A/ko not_active Application Discontinuation
- 2004-02-03 WO PCT/JP2004/001079 patent/WO2004075280A1/ja active Search and Examination
- 2004-02-16 TW TW093103631A patent/TWI246132B/zh not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5319224A (en) * | 1989-10-11 | 1994-06-07 | Mitsubishi Denki Kabushiki Kaisha | Integrated circuit device having a geometry to enhance fabrication and testing and manufacturing method thereof |
JPH05343634A (ja) * | 1992-06-06 | 1993-12-24 | Hitachi Ltd | 半導体記憶装置 |
JPH0888253A (ja) * | 1994-09-16 | 1996-04-02 | Nippon Steel Corp | 半導体装置用端子接触装置 |
US5842628A (en) * | 1995-04-10 | 1998-12-01 | Fujitsu Limited | Wire bonding method, semiconductor device, capillary for wire bonding and ball bump forming method |
JP2002217298A (ja) * | 2001-01-19 | 2002-08-02 | Nec Kansai Ltd | 半導体ウエハ |
Non-Patent Citations (1)
Title |
---|
See also references of EP1608009A4 * |
Also Published As
Publication number | Publication date |
---|---|
KR20050100663A (ko) | 2005-10-19 |
EP1608009A4 (en) | 2010-05-19 |
EP1608009A1 (en) | 2005-12-21 |
US20060186403A1 (en) | 2006-08-24 |
TW200428541A (en) | 2004-12-16 |
JP2004265940A (ja) | 2004-09-24 |
TWI246132B (en) | 2005-12-21 |
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