KR920001036B1 - 높이가 고르지 않은 기판상에서 금속필라를 평탄화시키는 방법 - Google Patents
높이가 고르지 않은 기판상에서 금속필라를 평탄화시키는 방법 Download PDFInfo
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- KR920001036B1 KR920001036B1 KR1019880003019A KR880003019A KR920001036B1 KR 920001036 B1 KR920001036 B1 KR 920001036B1 KR 1019880003019 A KR1019880003019 A KR 1019880003019A KR 880003019 A KR880003019 A KR 880003019A KR 920001036 B1 KR920001036 B1 KR 920001036B1
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- 229910052751 metal Inorganic materials 0.000 title claims description 84
- 239000002184 metal Substances 0.000 title claims description 84
- 239000000758 substrate Substances 0.000 title claims description 53
- 238000001465 metallisation Methods 0.000 claims description 58
- 230000004888 barrier function Effects 0.000 claims description 50
- 238000000034 method Methods 0.000 claims description 48
- 239000004065 semiconductor Substances 0.000 claims description 17
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 238000000059 patterning Methods 0.000 claims description 8
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229920002120 photoresistant polymer Polymers 0.000 claims description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 238000001020 plasma etching Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 238000005229 chemical vapour deposition Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- 229920005591 polysilicon Polymers 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/7684—Smoothing; Planarisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76819—Smoothing of the dielectric
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Drying Of Semiconductors (AREA)
Abstract
Description
Claims (26)
- 높이가 고르지 않은 표면을 갖는 기판(10)위에 수직금속 상호접속물을 형성하는 방법에 있어서, 기판(10)의 표면과 일치하도록 제1금속화층(22)을 형성하는 단계, 최소한 제1금속화층(22)의 선택된 영역들위에 에치스톱(stop) 장벽층(24)을 형성하는 단계, 에칭 장벽층(24) 및 제1금속화층(22)과 일치하도록 제2금속화층을 형성하는 단계, 서로 다른 높이를 갖는 영역들위에서 수직금속 상호접속물들(30,32)을 정하기 위하여 결합된 제1과 제2금속화층(22,26) 및 에치스톱층들(24,28)을 패턴닝(patterning)하는 단계, 및 제1금속화층 위에 있는 에칭 장벽층(24)에 대하여 보다 높은 높이를 갖는 수직금속 상호접속물들(30,32)을 선택적으로 에칭-백(etching-back)하는 단계를 포함하는 방법.
- 제1항에 있어서, 제1금속화층(22)을 형성하기 전에 장벽층(28)이 기판위에 형성되는 방법.
- 제1항에 있어서, 제2금속화층(26)이 높이가 고르지 않은 표면상의 높이 변화와 거의 동일한 두께를 갖는 방법.
- 제3항에 있어서, 제1금속화층(22)의 두께가 차후에 기판상의 가장 높은 영역들위에 도포되는 금속간 유전층의 두께와 거의 동일한 방법.
- 제1항에 있어서, 에칭스톱 장벽층(24)이 제1금속화층(22)의 전체 표면위에 형성되는 방법.
- 제1항에 있어서, 에칭스톱 장벽층이, 보다 높은 기판영역들위에 형성되는 상위 금속 상호접속물(32)들을 갖는 보다 높은 기판영역들위에만 형성되는 방법.
- 제1항에 있어서, 결합된 금속화층과 에칭스톱 장벽층이 포토레지스트 마스크를 통하여 반응이온 에칭법에 의해 패턴되는 방법.
- 높이가 고르지 않은 표면을 갖는 기판(10)위에 수직금속 상호접속물들을 형성하는 방법에 있어서, 기판(10)의 표면과 일치하도록 제1금속화층(22)을 형성하는 단계, 최소한 제1금속화층(22)의 선택된 영역들 위에 에치스톱 장벽층(24)을 형성하는 단계, 에칭스톱 장벽층(24) 및 제1금속화층(22)과 일치하도록 제2금속화층(26)을 형성하는 단계, 서로 다른 높이를 갖는 영역들위에서 수직금속 상호접속물들(30,32)을 정하기 위하여 결합된 제1과 제2금속화층(22,26) 및 에치스톱 장벽층(24,28)을 패턴닝하는 단계, 모든 수직금속 상호접속물들(30,32)을 덮도록 유전층(36)을 형성하는 단계, 상위 수직금속 상호접속물들(32)만을 노출하기 위하여 유전층(36)을 평탄화하는 단계, 및 금속화층들(26,22)중간의 에칭 장벽층(24)에 대하여 상위 수직금속 상호접속물들(32)을 선택적으로 에칭-백하는 단계를 포함하는 방법.
- 제8항에 있어서, 제1금속화층(22)을 형성하기전에 장벽층(28)이 기판위에 형성되는 방법.
- 제8항에 있어서, 제2금속화층(26)이, 높이가 고르지 않은 표면상의 높이 변화와 거의 동일한 두께를 갖는 방법.
- 제10항에 있어서, 제1금속화층(22)의 두께가 차후에 기판상의 가장 높은 영역들위에 도포되는 금속간 유전층의 두께와 대략 동일한 방법.
- 제8항에 있어서, 에칭스톱 장벽층(24)이 제1금속화층(22)의 전체 표면위에 형성되는 방법.
- 제8항에 있어서, 에치스톱 장벽층이 보다 높은 높이의 기판영역들위에 형성되는 상위 금속 상호접속물들(32)을 갖는 보다 높은 높이의 기판영역들위에만 형성되는 방법.
- 제8항에 있어서, 결합된 금속화층과 에치스톱 장벽층이 포토레지스트 마스크를 통한 반응이온 에칭법에 의해 패턴되는 방법.
- 제8항에 있어서, 유전층(36)이 화학적 증착법에 의해 데포지트되는 이산화 실리콘인 방법.
- 제8항에 있어서, 희생층을 도포하여 하위 수직 상호접속물들(30)은 피복상태로 놔두며 상위 수직 상호접속물들은 피복을 제거하기 위하여 결합된 희생층과 유전층을 충분하게 에칭-백함으로서 유전층(36)이 평탄화되는 방법.
- 제16항에 있어서, 노출된 수직금속 상호접속물들이 알루미늄 또는 알루미늄합금이며, 염소를 함유한 플라즈마로 에칭-백되는 방법.
- 제17항에 있어서, 에칭스톱 장벽층(24)이 텅스텐-티타늄이며, 불소를 함유한 플라즈마로 에치스톱 장벽층을 에칭-백하는 단계를 더욱 포함하는 방법.
- 수직금속 상호접속물들이 서로 다른 높이를 갖는 영역위에 위치하는 형태의 반도체 웨이퍼기판(10)위에 수직금속 상호접속물들(30,32)을 형성하는 방법에 있어서, 기판(10)과 일치하며 최소한 몇몇의 영역들사이의 예상되는 높이거리와 동일한 거리만큼 에치스톱 장벽층의 상부표면 아래에 형성되는 에치스톱 장벽층(24)를 갖도록 금속화층(22)을 형성하는 단계, 상기 서로 다른 높이를 갖는영역들위에서 수직금속 상호접속물들(30,32)을 정하기 위하여 금속화층을 패턴닝하는 단계, 및 보다 높은 높이를 갖는 수직금속 상호접속물들(32)을 에치 장벽층에 대하여 선택적으로 에칭-백함으로써 상측 수직 상호접속물들(32)의 높이가 거의 하위 수직 상호접속물들(30)의 높이로 감소되는 단계를 포함하여, 수직금속 상호접속물들을 평탄화하는 방법.
- 제19항에 있어서, 금속화층이 알루미늄 또는 알루미늄합금인 방법.
- 제19항에 있어서, 에치스톱 장벽층이 텅스텐-티타늄인 방법.
- 제19항에 있어서, 상기 모든 상호접속물들 위에 유전층 형성하고, 상기 유전층상에 희생층을 도포하며, 결합된 유전층과 희생층을 에칭-백하여 상측 수직 상호접속점들을 노출한 다음, 최종적으로 상기 노출된 상호접속점들을 에치스톱 장벽층에 대하여 에칭-백함으로써 수직금속 상호 접속점들이 선택적으로 에칭되는 방법.
- 제22항에 있어서, 상기 노출된 에치스톱 장벽층을 이 밑에 놓여있는 알루미늄층에 대하여 에칭-백하는 단계를 더욱 포함하는 방법.
- 최소한 몇몇의 상호접속물들이 이 길이를 따라 횡단으로 형성된 에치스톱 장벽층을 포함하는 다수의 수직금속 상호접속물들을 갖는 반도체소자.
- 제24항에 있어서, 높이가 고르지 않은 표면을 갖는 기판과 그 기판위에 최소한 하나의 금속화층을 포함하고, 수직금속 상호접속물들이 기판상의 능동영역들과 금속화층사이에서 연장되는 반도체소자.
- 제25항에 있어서, 에치스톱 장벽층을 포함하는 수직금속 상호접속물들이 기판상의 하위영역들과 금속화층사이에서 연장되며, 에치스톱 장벽층이 없는 수직 상호접속물들이 기판상의 상위영역들과 금속화층사이에서 연장되는 반도체소자.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US033.961 | 1987-04-01 | ||
US033,961 | 1987-04-01 | ||
US07/033,961 US4824521A (en) | 1987-04-01 | 1987-04-01 | Planarization of metal pillars on uneven substrates |
Publications (2)
Publication Number | Publication Date |
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KR880013231A KR880013231A (ko) | 1988-11-30 |
KR920001036B1 true KR920001036B1 (ko) | 1992-02-01 |
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Application Number | Title | Priority Date | Filing Date |
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KR1019880003019A KR920001036B1 (ko) | 1987-04-01 | 1988-03-22 | 높이가 고르지 않은 기판상에서 금속필라를 평탄화시키는 방법 |
Country Status (4)
Country | Link |
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US (1) | US4824521A (ko) |
EP (1) | EP0285410A1 (ko) |
JP (1) | JPH0680667B2 (ko) |
KR (1) | KR920001036B1 (ko) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2211348A (en) * | 1987-10-16 | 1989-06-28 | Philips Nv | A method of forming an interconnection between conductive levels |
GB2214709A (en) * | 1988-01-20 | 1989-09-06 | Philips Nv | A method of enabling connection to a substructure forming part of an electronic device |
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EP0407062A3 (en) * | 1989-06-29 | 1991-02-06 | Texas Instruments Incorporated | A method and apparatus for forming an infrared detector having a refractory metal |
US4935376A (en) * | 1989-10-12 | 1990-06-19 | At&T Bell Laboratories | Making silicide gate level runners |
US4933297A (en) * | 1989-10-12 | 1990-06-12 | At&T Bell Laboratories | Method for etching windows having different depths |
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US5034348A (en) * | 1990-08-16 | 1991-07-23 | International Business Machines Corp. | Process for forming refractory metal silicide layers of different thicknesses in an integrated circuit |
JPH04123458A (ja) * | 1990-09-14 | 1992-04-23 | Mitsubishi Electric Corp | 半導体装置の製造方法 |
US5217570A (en) * | 1991-01-31 | 1993-06-08 | Sony Corporation | Dry etching method |
US5422289A (en) * | 1992-04-27 | 1995-06-06 | National Semiconductor Corporation | Method of manufacturing a fully planarized MOSFET and resulting structure |
US5302551A (en) * | 1992-05-11 | 1994-04-12 | National Semiconductor Corporation | Method for planarizing the surface of an integrated circuit over a metal interconnect layer |
US5256597A (en) * | 1992-09-04 | 1993-10-26 | International Business Machines Corporation | Self-aligned conducting etch stop for interconnect patterning |
GB9219267D0 (en) * | 1992-09-11 | 1992-10-28 | Inmos Ltd | Manufacture of semiconductor devices |
GB9219281D0 (en) * | 1992-09-11 | 1992-10-28 | Inmos Ltd | Manufacture of semiconductor devices |
US5268330A (en) * | 1992-12-11 | 1993-12-07 | International Business Machines Corporation | Process for improving sheet resistance of an integrated circuit device gate |
US5401913A (en) * | 1993-06-08 | 1995-03-28 | Minnesota Mining And Manufacturing Company | Electrical interconnections between adjacent circuit board layers of a multi-layer circuit board |
EP1098366A1 (en) * | 1994-12-29 | 2001-05-09 | STMicroelectronics, Inc. | Semiconductor connection structure and method |
US5846880A (en) * | 1995-04-28 | 1998-12-08 | Vanguard International Semiconductor Corporation | Process for removing titanium nitride layer in an integrated circuit |
US5945348A (en) | 1996-04-04 | 1999-08-31 | Micron Technology, Inc. | Method for reducing the heights of interconnects on a projecting region with a smaller reduction in the heights of other interconnects |
US6004874A (en) * | 1996-06-26 | 1999-12-21 | Cypress Semiconductor Corporation | Method for forming an interconnect |
US5916453A (en) | 1996-09-20 | 1999-06-29 | Fujitsu Limited | Methods of planarizing structures on wafers and substrates by polishing |
US6828230B2 (en) | 1997-09-12 | 2004-12-07 | Micron Technology, Inc. | Integrated circuit having conductive paths of different heights formed from the same layer structure and method for forming the same |
US8076229B2 (en) * | 2008-05-30 | 2011-12-13 | Micron Technology, Inc. | Methods of forming data cells and connections to data cells |
CN102543839B (zh) * | 2010-12-22 | 2014-01-08 | 中国科学院微电子研究所 | 层间电介质层的平面化方法 |
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US4299680A (en) * | 1979-12-31 | 1981-11-10 | Texas Instruments Incorporated | Method of fabricating magnetic bubble memory device having planar overlay pattern of magnetically soft material |
US4374159A (en) * | 1981-07-27 | 1983-02-15 | Bell Telephone Laboratories, Incorporated | Fabrication of film circuits having a thick film crossunder and a thin film capacitor |
JPS5848438A (ja) * | 1981-09-17 | 1983-03-22 | Nec Corp | 半導体集積回路装置 |
US4451326A (en) * | 1983-09-07 | 1984-05-29 | Advanced Micro Devices, Inc. | Method for interconnecting metallic layers |
KR900004968B1 (ko) * | 1984-02-10 | 1990-07-12 | 후지쓰 가부시끼가이샤 | 반도체장치 제조방법 |
JPS612346A (ja) * | 1984-06-15 | 1986-01-08 | Hitachi Ltd | 多層配線の製造方法 |
US4614021A (en) * | 1985-03-29 | 1986-09-30 | Motorola, Inc. | Pillar via process |
JPS61258453A (ja) * | 1985-05-13 | 1986-11-15 | Toshiba Corp | 半導体装置の製造方法 |
US4661204A (en) * | 1985-10-25 | 1987-04-28 | Tandem Computers Inc. | Method for forming vertical interconnects in polyimide insulating layers |
US4708770A (en) * | 1986-06-19 | 1987-11-24 | Lsi Logic Corporation | Planarized process for forming vias in silicon wafers |
-
1987
- 1987-04-01 US US07/033,961 patent/US4824521A/en not_active Expired - Lifetime
-
1988
- 1988-03-22 KR KR1019880003019A patent/KR920001036B1/ko not_active IP Right Cessation
- 1988-03-30 EP EP88302872A patent/EP0285410A1/en not_active Withdrawn
- 1988-04-01 JP JP63078313A patent/JPH0680667B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
KR880013231A (ko) | 1988-11-30 |
JPS6447049A (en) | 1989-02-21 |
EP0285410A1 (en) | 1988-10-05 |
US4824521A (en) | 1989-04-25 |
JPH0680667B2 (ja) | 1994-10-12 |
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