FR2490018B1 - Procede et dispositif pour etalonner les intervalles de bande d'alliages semi-conducteurs amorphes et alliages obtenus - Google Patents

Procede et dispositif pour etalonner les intervalles de bande d'alliages semi-conducteurs amorphes et alliages obtenus

Info

Publication number
FR2490018B1
FR2490018B1 FR8116956A FR8116956A FR2490018B1 FR 2490018 B1 FR2490018 B1 FR 2490018B1 FR 8116956 A FR8116956 A FR 8116956A FR 8116956 A FR8116956 A FR 8116956A FR 2490018 B1 FR2490018 B1 FR 2490018B1
Authority
FR
France
Prior art keywords
alloys
calibrating
amorphous semiconductor
band intervals
intervals
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.)
Expired
Application number
FR8116956A
Other languages
English (en)
Other versions
FR2490018A1 (fr
Inventor
Stanford Robert Ovshinsky
David Adler
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.)
Energy Conversion Devices Inc
Original Assignee
Energy Conversion Devices Inc
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
Priority claimed from US06/185,520 external-priority patent/US4342044A/en
Application filed by Energy Conversion Devices Inc filed Critical Energy Conversion Devices Inc
Publication of FR2490018A1 publication Critical patent/FR2490018A1/fr
Application granted granted Critical
Publication of FR2490018B1 publication Critical patent/FR2490018B1/fr
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/44Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
    • C23C16/455Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
    • C23C16/45523Pulsed gas flow or change of composition over time
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/0021Reactive sputtering or evaporation
    • C23C14/0026Activation or excitation of reactive gases outside the coating chamber
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/24Vacuum evaporation
    • C23C14/32Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/02Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/12Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
    • H01L29/16Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic Table
    • H01L29/1604Amorphous materials
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/06Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by potential barriers
    • H01L31/065Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by potential barriers the potential barriers being only of the graded gap type
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/20Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof such devices or parts thereof comprising amorphous semiconductor materials
    • H01L31/202Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof such devices or parts thereof comprising amorphous semiconductor materials including only elements of Group IV of the Periodic Table
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/20Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof such devices or parts thereof comprising amorphous semiconductor materials
    • H01L31/202Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof such devices or parts thereof comprising amorphous semiconductor materials including only elements of Group IV of the Periodic Table
    • H01L31/204Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof such devices or parts thereof comprising amorphous semiconductor materials including only elements of Group IV of the Periodic Table including AIVBIV alloys, e.g. SiGe, SiC
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/547Monocrystalline silicon PV cells
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electromagnetism (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Photovoltaic Devices (AREA)
  • Silicon Compounds (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Chemical Vapour Deposition (AREA)
FR8116956A 1980-09-09 1981-09-07 Procede et dispositif pour etalonner les intervalles de bande d'alliages semi-conducteurs amorphes et alliages obtenus Expired FR2490018B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/185,520 US4342044A (en) 1978-03-08 1980-09-09 Method for optimizing photoresponsive amorphous alloys and devices
US20657980A 1980-11-13 1980-11-13

Publications (2)

Publication Number Publication Date
FR2490018A1 FR2490018A1 (fr) 1982-03-12
FR2490018B1 true FR2490018B1 (fr) 1986-01-17

Family

ID=26881211

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8116956A Expired FR2490018B1 (fr) 1980-09-09 1981-09-07 Procede et dispositif pour etalonner les intervalles de bande d'alliages semi-conducteurs amorphes et alliages obtenus

Country Status (14)

Country Link
KR (1) KR890000478B1 (fr)
AU (1) AU547173B2 (fr)
BR (1) BR8105747A (fr)
CA (1) CA1192819A (fr)
DE (1) DE3135411C2 (fr)
ES (1) ES505268A0 (fr)
FR (1) FR2490018B1 (fr)
GB (1) GB2083701B (fr)
IE (1) IE52207B1 (fr)
IL (1) IL63754A (fr)
IN (1) IN157458B (fr)
IT (1) IT1138202B (fr)
NL (1) NL8104140A (fr)
SE (1) SE455554B (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5795677A (en) * 1980-12-03 1982-06-14 Kanegafuchi Chem Ind Co Ltd Amorphous silicon type photoelectric tranducer
US4523214A (en) * 1981-07-03 1985-06-11 Fuji Photo Film Co., Ltd. Solid state image pickup device utilizing microcrystalline and amorphous silicon
JPS58501975A (ja) * 1981-11-20 1983-11-17 クロ−ナ−・コ−ポレイション 非晶質半導体のバンド・ギャップ制御
US4460670A (en) * 1981-11-26 1984-07-17 Canon Kabushiki Kaisha Photoconductive member with α-Si and C, N or O and dopant
US4460669A (en) * 1981-11-26 1984-07-17 Canon Kabushiki Kaisha Photoconductive member with α-Si and C, U or D and dopant
US4465750A (en) * 1981-12-22 1984-08-14 Canon Kabushiki Kaisha Photoconductive member with a -Si having two layer regions
JPS5914679A (ja) * 1982-07-16 1984-01-25 Toshiba Corp 光起電力装置
JPS59111152A (ja) * 1982-12-16 1984-06-27 Sharp Corp 電子写真用感光体
US4547621A (en) * 1984-06-25 1985-10-15 Sovonics Solar Systems Stable photovoltaic devices and method of producing same
DE8430810U1 (de) * 1984-10-19 1986-05-07 Siemens AG, 1000 Berlin und 8000 München Solarzelle mit graduellem Energiebandabstand mit einem aus amorphem Silizium bestehenden Halbleiterkorper
JPS61104678A (ja) * 1984-10-29 1986-05-22 Mitsubishi Electric Corp アモルフアス太陽電池
CA1269164A (fr) * 1986-03-24 1990-05-15 Metin Aktik Biode photosensible a couche de silicium amorphe hydrogene
FR2630260B1 (fr) * 1988-04-19 1991-11-29 Thomson Csf Photodetecteur en silicium amorphe a rendement quantique ameliore
DE19700697A1 (de) * 1997-01-13 1998-07-16 Goeller Christian Verfahren zur Herstellung von Solarzellen
US6437233B1 (en) * 2000-07-25 2002-08-20 Trw Inc. Solar cell having multi-quantum well layers transitioning from small to large band gaps and method of manufacture therefor
EP1919264A1 (fr) 2006-11-02 2008-05-07 Dow Corning Corporation Dispositif de formation d'une couche par déposition à partir d'un plasma
EP1918414A1 (fr) 2006-11-02 2008-05-07 Dow Corning Corporation Procédé de formation d'un film amorphe à intervalle de bande graduel par résonance cyclonique électronique
EP1923483A1 (fr) 2006-11-02 2008-05-21 Dow Corning Corporation Deposition de films de silicium amorphe par resonnance cyclotron
EP1918967B1 (fr) 2006-11-02 2013-12-25 Dow Corning Corporation Procédé de formation d'une couche par déposition à partir d'un plasma
EP1918966A1 (fr) * 2006-11-02 2008-05-07 Dow Corning Corporation Procédé de formation d'une couche à intervalle de bande graduel par déposition d'un matériau amorphe à partir d'un plasma
EP1918965A1 (fr) 2006-11-02 2008-05-07 Dow Corning Corporation Procédé et appareil pour formation d'un film par dépôt d'un plasma

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1123525A (fr) * 1977-10-12 1982-05-11 Stanford R. Ovshinsky Semiconducteur amorphe pouvant supporter les hautes temperatures et methode de fabrication
US4342044A (en) * 1978-03-08 1982-07-27 Energy Conversion Devices, Inc. Method for optimizing photoresponsive amorphous alloys and devices
US4217374A (en) * 1978-03-08 1980-08-12 Energy Conversion Devices, Inc. Amorphous semiconductors equivalent to crystalline semiconductors
US4226898A (en) * 1978-03-16 1980-10-07 Energy Conversion Devices, Inc. Amorphous semiconductors equivalent to crystalline semiconductors produced by a glow discharge process
JPS5513938A (en) 1978-07-17 1980-01-31 Shunpei Yamazaki Photoelectronic conversion semiconductor device and its manufacturing method
JPS5513939A (en) 1978-07-17 1980-01-31 Shunpei Yamazaki Photoelectronic conversion semiconductor device
DE2950008A1 (de) * 1979-12-12 1981-06-19 Siemens AG, 1000 Berlin und 8000 München Dauermagneterregter laeufer fuer eine synchronmaschine
IN157494B (fr) * 1980-09-09 1986-04-12 Energy Conversion Devices Inc

Also Published As

Publication number Publication date
IE52207B1 (en) 1987-08-05
ES8302361A1 (es) 1982-12-16
GB2083701A (en) 1982-03-24
CA1192819A (fr) 1985-09-03
KR890000478B1 (ko) 1989-03-18
SE8105277L (sv) 1982-03-10
DE3135411C2 (de) 1994-07-07
KR830008406A (ko) 1983-11-18
IL63754A (en) 1984-07-31
IT8123825A0 (it) 1981-09-07
NL8104140A (nl) 1982-04-01
GB2083701B (en) 1985-09-04
IE812063L (en) 1982-03-09
IT1138202B (it) 1986-09-17
IL63754A0 (en) 1981-12-31
AU547173B2 (en) 1985-10-10
SE455554B (sv) 1988-07-18
AU7501981A (en) 1982-03-18
FR2490018A1 (fr) 1982-03-12
DE3135411A1 (de) 1982-09-23
BR8105747A (pt) 1982-05-25
IN157458B (fr) 1986-04-05
ES505268A0 (es) 1982-12-16

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