DE3806164A1 - Halbleiterbauelement mit hoher durchbruchspannung - Google Patents

Halbleiterbauelement mit hoher durchbruchspannung

Info

Publication number
DE3806164A1
DE3806164A1 DE3806164A DE3806164A DE3806164A1 DE 3806164 A1 DE3806164 A1 DE 3806164A1 DE 3806164 A DE3806164 A DE 3806164A DE 3806164 A DE3806164 A DE 3806164A DE 3806164 A1 DE3806164 A1 DE 3806164A1
Authority
DE
Germany
Prior art keywords
semiconductor
semiconductor zone
zone
layer
conductivity type
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE3806164A
Other languages
German (de)
English (en)
Other versions
DE3806164C2 (cg-RX-API-DMAC7.html
Inventor
Akio Nakagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26383357&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3806164(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of DE3806164A1 publication Critical patent/DE3806164A1/de
Application granted granted Critical
Publication of DE3806164C2 publication Critical patent/DE3806164C2/de
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D30/00—Field-effect transistors [FET]
    • H10D30/60—Insulated-gate field-effect transistors [IGFET]
    • H10D30/64—Double-diffused metal-oxide semiconductor [DMOS] FETs
    • H10D30/65—Lateral DMOS [LDMOS] FETs
    • H10D30/657—Lateral DMOS [LDMOS] FETs having substrates comprising insulating layers, e.g. SOI-LDMOS transistors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D12/00—Bipolar devices controlled by the field effect, e.g. insulated-gate bipolar transistors [IGBT]
    • H10D12/411—Insulated-gate bipolar transistors [IGBT]
    • H10D12/421—Insulated-gate bipolar transistors [IGBT] on insulating layers or insulating substrates, e.g. thin-film IGBTs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D18/00—Thyristors
    • H10D18/251—Lateral thyristors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D18/00—Thyristors
    • H10D18/40—Thyristors with turn-on by field effect 
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D18/00—Thyristors
    • H10D18/60—Gate-turn-off devices 
    • H10D18/65—Gate-turn-off devices  with turn-off by field effect 
    • H10D18/655—Gate-turn-off devices  with turn-off by field effect  produced by insulated gate structures
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D30/00—Field-effect transistors [FET]
    • H10D30/01—Manufacture or treatment
    • H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
    • H10D30/031—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT]
    • H10D30/0321—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT] comprising silicon, e.g. amorphous silicon or polysilicon
    • H10D30/0323—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT] comprising silicon, e.g. amorphous silicon or polysilicon comprising monocrystalline silicon
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D30/00—Field-effect transistors [FET]
    • H10D30/60—Insulated-gate field-effect transistors [IGFET]
    • H10D30/601—Insulated-gate field-effect transistors [IGFET] having lightly-doped drain or source extensions, e.g. LDD IGFETs or DDD IGFETs 
    • H10D30/603—Insulated-gate field-effect transistors [IGFET] having lightly-doped drain or source extensions, e.g. LDD IGFETs or DDD IGFETs  having asymmetry in the channel direction, e.g. lateral high-voltage MISFETs having drain offset region or extended drain IGFETs [EDMOS]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D30/00—Field-effect transistors [FET]
    • H10D30/60—Insulated-gate field-effect transistors [IGFET]
    • H10D30/67—Thin-film transistors [TFT]
    • H10D30/6704—Thin-film transistors [TFT] having supplementary regions or layers in the thin films or in the insulated bulk substrates for controlling properties of the device
    • H10D30/6713—Thin-film transistors [TFT] having supplementary regions or layers in the thin films or in the insulated bulk substrates for controlling properties of the device characterised by the properties of the source or drain regions, e.g. compositions or sectional shapes
    • H10D30/6715—Thin-film transistors [TFT] having supplementary regions or layers in the thin films or in the insulated bulk substrates for controlling properties of the device characterised by the properties of the source or drain regions, e.g. compositions or sectional shapes characterised by the doping profiles, e.g. having lightly-doped source or drain extensions
    • H10D30/6717—Thin-film transistors [TFT] having supplementary regions or layers in the thin films or in the insulated bulk substrates for controlling properties of the device characterised by the properties of the source or drain regions, e.g. compositions or sectional shapes characterised by the doping profiles, e.g. having lightly-doped source or drain extensions the source and the drain regions being asymmetrical
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D64/00—Electrodes of devices having potential barriers
    • H10D64/111—Field plates
    • H10D64/112—Field plates comprising multiple field plate segments
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D64/00—Electrodes of devices having potential barriers
    • H10D64/111—Field plates
    • H10D64/115—Resistive field plates, e.g. semi-insulating field plates
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D64/00—Electrodes of devices having potential barriers
    • H10D64/111—Field plates
    • H10D64/117—Recessed field plates, e.g. trench field plates or buried field plates
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D64/00—Electrodes of devices having potential barriers
    • H10D64/118—Electrodes comprising insulating layers having particular dielectric or electrostatic properties, e.g. having static charges
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D8/00—Diodes
    • H10D8/411—PN diodes having planar bodies
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
    • H10D84/40—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups H10D12/00 or H10D30/00 with at least one component covered by groups H10D10/00 or H10D18/00, e.g. integration of IGFETs with BJTs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • H10D86/201—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates the substrates comprising an insulating layer on a semiconductor body, e.g. SOI
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
    • H10W10/01—Manufacture or treatment
    • H10W10/011—Manufacture or treatment of isolation regions comprising dielectric materials
    • H10W10/019—Manufacture or treatment of isolation regions comprising dielectric materials using epitaxial passivated integrated circuit [EPIC] processes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
    • H10W10/10—Isolation regions comprising dielectric materials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W15/00—Highly-doped buried regions of integrated devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W15/00—Highly-doped buried regions of integrated devices
    • H10W15/01—Manufacture or treatment
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D64/00—Electrodes of devices having potential barriers
    • H10D64/111—Field plates
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
    • H10P90/00—Preparation of wafers not covered by a single main group of this subclass, e.g. wafer reinforcement
    • H10P90/19—Preparing inhomogeneous wafers
    • H10P90/1904—Preparing vertically inhomogeneous wafers
    • H10P90/1906—Preparing SOI wafers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
    • H10P90/00—Preparation of wafers not covered by a single main group of this subclass, e.g. wafer reinforcement
    • H10P90/19—Preparing inhomogeneous wafers
    • H10P90/1904—Preparing vertically inhomogeneous wafers
    • H10P90/1906—Preparing SOI wafers
    • H10P90/1914—Preparing SOI wafers using bonding
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
    • H10W10/01—Manufacture or treatment
    • H10W10/041—Manufacture or treatment of isolation regions comprising polycrystalline semiconductor materials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
    • H10W10/01—Manufacture or treatment
    • H10W10/061—Manufacture or treatment using SOI processes together with lateral isolation, e.g. combinations of SOI and shallow trench isolations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
    • H10W10/10—Isolation regions comprising dielectric materials
    • H10W10/181—Semiconductor-on-insulator [SOI] isolation regions, e.g. buried oxide regions of SOI wafers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
    • H10W10/40—Isolation regions comprising polycrystalline semiconductor materials

Landscapes

  • Element Separation (AREA)
  • Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
DE3806164A 1987-02-26 1988-02-26 Halbleiterbauelement mit hoher durchbruchspannung Granted DE3806164A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4356487 1987-02-26
JP18942087 1987-07-29

Publications (2)

Publication Number Publication Date
DE3806164A1 true DE3806164A1 (de) 1988-09-08
DE3806164C2 DE3806164C2 (cg-RX-API-DMAC7.html) 1991-03-14

Family

ID=26383357

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3806164A Granted DE3806164A1 (de) 1987-02-26 1988-02-26 Halbleiterbauelement mit hoher durchbruchspannung

Country Status (3)

Country Link
JP (1) JP2896141B2 (cg-RX-API-DMAC7.html)
DE (1) DE3806164A1 (cg-RX-API-DMAC7.html)
IT (1) IT1216464B (cg-RX-API-DMAC7.html)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0361319A3 (de) * 1988-09-27 1990-06-06 Asea Brown Boveri Aktiengesellschaft Leistungshalbleiterbauelement
EP0497577A3 (en) * 1991-01-31 1992-08-19 Kabushiki Kaisha Toshiba High breakdown voltage semiconductor device
EP0503131A1 (en) * 1991-03-12 1992-09-16 Power Integrations, Inc. MOS Gated bipolar transistor
DE4317570A1 (de) * 1992-05-28 1993-12-16 Fujitsu Ltd Halbleiteranordnung und Verfahren zur Herstellung derselben
EP0596264A1 (de) * 1992-10-07 1994-05-11 Daimler-Benz Aktiengesellschaft Halbleiterbauelement mit hoher Durchbruchsspannung
US5343067A (en) * 1987-02-26 1994-08-30 Kabushiki Kaisha Toshiba High breakdown voltage semiconductor device
US5374843A (en) * 1991-05-06 1994-12-20 Silinconix, Inc. Lightly-doped drain MOSFET with improved breakdown characteristics
WO1995010122A1 (de) * 1993-10-01 1995-04-13 Daimler-Benz Aktiengesellschaft Halbleiterbauelement mit hoher durchbruchsspannung
EP0514060B1 (en) * 1991-05-06 1998-02-18 SILICONIX Incorporated DMOS transistor structure & method
US6531738B1 (en) 1999-08-31 2003-03-11 Matsushita Electricindustrial Co., Ltd. High voltage SOI semiconductor device

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5373183A (en) * 1993-04-28 1994-12-13 Harris Corporation Integrated circuit with improved reverse bias breakdown
JP2755185B2 (ja) * 1994-11-07 1998-05-20 日本電気株式会社 Ｓｏｉ基板
JP3435930B2 (ja) * 1995-09-28 2003-08-11 株式会社デンソー 半導体装置及びその製造方法
SE9901575L (sv) * 1999-05-03 2000-11-04 Eklund Klas Haakan Halvledarelement
JP2004207418A (ja) * 2002-12-25 2004-07-22 Nippon Inter Electronics Corp 半導体装置及びその製造方法
JP5069851B2 (ja) * 2005-09-26 2012-11-07 株式会社日立製作所 半導体装置
JP4767264B2 (ja) * 2008-01-15 2011-09-07 三菱電機株式会社 高耐圧半導体装置
JP2012191235A (ja) * 2012-06-07 2012-10-04 Rohm Co Ltd 半導体装置
US9040384B2 (en) * 2012-10-19 2015-05-26 Freescale Semiconductor, Inc. High voltage diode
JP7404600B2 (ja) * 2019-11-01 2023-12-26 株式会社東海理化電機製作所 半導体集積回路
JP7461188B2 (ja) * 2020-03-23 2024-04-03 株式会社東海理化電機製作所 半導体集積回路

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104454A2 (en) * 1982-08-27 1984-04-04 Hitachi, Ltd. Semiconductor device with field plate

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0109888A3 (en) * 1982-11-12 1987-05-20 FAIRCHILD CAMERA & INSTRUMENT CORPORATION Subsurface zener diode
JPS59217338A (ja) * 1983-05-26 1984-12-07 Hitachi Ltd 半導体装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104454A2 (en) * 1982-08-27 1984-04-04 Hitachi, Ltd. Semiconductor device with field plate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
US-Z.: Electronics, Bd. 42, 31.3.1989, S. 90-95 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5343067A (en) * 1987-02-26 1994-08-30 Kabushiki Kaisha Toshiba High breakdown voltage semiconductor device
EP0361319A3 (de) * 1988-09-27 1990-06-06 Asea Brown Boveri Aktiengesellschaft Leistungshalbleiterbauelement
EP0497577A3 (en) * 1991-01-31 1992-08-19 Kabushiki Kaisha Toshiba High breakdown voltage semiconductor device
EP1202352A3 (en) * 1991-01-31 2003-08-06 Kabushiki Kaisha Toshiba High breakdown voltage semiconductor device
EP0503131A1 (en) * 1991-03-12 1992-09-16 Power Integrations, Inc. MOS Gated bipolar transistor
EP0514060B1 (en) * 1991-05-06 1998-02-18 SILICONIX Incorporated DMOS transistor structure & method
US5374843A (en) * 1991-05-06 1994-12-20 Silinconix, Inc. Lightly-doped drain MOSFET with improved breakdown characteristics
US5705425A (en) * 1992-05-28 1998-01-06 Fujitsu Limited Process for manufacturing semiconductor devices separated by an air-bridge
DE4317570A1 (de) * 1992-05-28 1993-12-16 Fujitsu Ltd Halbleiteranordnung und Verfahren zur Herstellung derselben
EP0596264A1 (de) * 1992-10-07 1994-05-11 Daimler-Benz Aktiengesellschaft Halbleiterbauelement mit hoher Durchbruchsspannung
WO1995010122A1 (de) * 1993-10-01 1995-04-13 Daimler-Benz Aktiengesellschaft Halbleiterbauelement mit hoher durchbruchsspannung
US5767548A (en) * 1993-10-01 1998-06-16 Daimler-Benz Aktiengesellschaft Semiconductor component with embedded fixed charges to provide increased high breakdown voltage
US6531738B1 (en) 1999-08-31 2003-03-11 Matsushita Electricindustrial Co., Ltd. High voltage SOI semiconductor device
USRE41368E1 (en) * 1999-08-31 2010-06-08 Panasonic Corporation High voltage SOI semiconductor device

Also Published As

Publication number Publication date
JP2896141B2 (ja) 1999-05-31
IT8819563A0 (it) 1988-02-26
IT1216464B (it) 1990-03-08
JPH01103851A (ja) 1989-04-20
DE3806164C2 (cg-RX-API-DMAC7.html) 1991-03-14

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