DE3526824A1 - Verfahren zum bilden eines monokristallinen duennen films aus einem verbindungshalbleiter - Google Patents

Verfahren zum bilden eines monokristallinen duennen films aus einem verbindungshalbleiter

Info

Publication number
DE3526824A1
DE3526824A1 DE19853526824 DE3526824A DE3526824A1 DE 3526824 A1 DE3526824 A1 DE 3526824A1 DE 19853526824 DE19853526824 DE 19853526824 DE 3526824 A DE3526824 A DE 3526824A DE 3526824 A1 DE3526824 A1 DE 3526824A1
Authority
DE
Germany
Prior art keywords
compound semiconductor
gaseous molecules
substrate
those
impurity element
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
DE19853526824
Other languages
German (de)
English (en)
Other versions
DE3526824C2 (enExample
Inventor
Hitoshi Abe
Junichi Nishizawa
Soubei Suzuki
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.)
Japan Science and Technology Agency
Original Assignee
Research Development Corp of Japan
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 JP59153977A external-priority patent/JPH0782991B2/ja
Priority claimed from JP59153980A external-priority patent/JPH0715884B2/ja
Application filed by Research Development Corp of Japan filed Critical Research Development Corp of Japan
Publication of DE3526824A1 publication Critical patent/DE3526824A1/de
Application granted granted Critical
Publication of DE3526824C2 publication Critical patent/DE3526824C2/de
Priority to US08/077,119 priority Critical patent/US5693139A/en
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/44—Chemical 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
    • C23C16/455—Chemical 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
    • C23C16/45523—Pulsed gas flow or change of composition over time
    • C23C16/45525—Atomic layer deposition [ALD]
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/44—Chemical 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
    • C23C16/455—Chemical 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
    • C23C16/45523—Pulsed gas flow or change of composition over time
    • C23C16/45525—Atomic layer deposition [ALD]
    • C23C16/45527—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations
    • C23C16/45531—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations specially adapted for making ternary or higher compositions
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
    • C30B25/02—Epitaxial-layer growth
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
    • C30B25/02—Epitaxial-layer growth
    • C30B25/14—Feed and outlet means for the gases; Modifying the flow of the reactive gases
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10—Inorganic compounds or compositions
    • C30B29/40—AIIIBV compounds wherein A is B, Al, Ga, In or Tl and B is N, P, As, Sb or Bi
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10—Inorganic compounds or compositions
    • C30B29/40—AIIIBV compounds wherein A is B, Al, Ga, In or Tl and B is N, P, As, Sb or Bi
    • C30B29/42—Gallium arsenide
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/60—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
    • C30B29/68—Crystals with laminate structure, e.g. "superlattices"
    • 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
    • H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
    • H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
    • H10P14/24—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials using chemical vapour deposition [CVD]
    • 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
    • H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
    • H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
    • H10P14/27—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials using selective deposition, e.g. simultaneous growth of monocrystalline and non-monocrystalline semiconductor materials
    • H10P14/271—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials using selective deposition, e.g. simultaneous growth of monocrystalline and non-monocrystalline semiconductor materials characterised by the preparation of substrate for selective deposition
    • 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
    • H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
    • H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
    • H10P14/29—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials characterised by the substrates
    • H10P14/2901—Materials
    • H10P14/2907—Materials being Group IIIA-VA materials
    • H10P14/2911—Arsenides
    • 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
    • H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
    • H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
    • H10P14/34—Deposited materials, e.g. layers
    • H10P14/3402—Deposited materials, e.g. layers characterised by the chemical composition
    • H10P14/3414—Deposited materials, e.g. layers characterised by the chemical composition being group IIIA-VIA materials
    • H10P14/3418—Phosphides
    • 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
    • H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
    • H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
    • H10P14/34—Deposited materials, e.g. layers
    • H10P14/3402—Deposited materials, e.g. layers characterised by the chemical composition
    • H10P14/3414—Deposited materials, e.g. layers characterised by the chemical composition being group IIIA-VIA materials
    • H10P14/3421—Arsenides
    • 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
    • H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
    • H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
    • H10P14/34—Deposited materials, e.g. layers
    • H10P14/3402—Deposited materials, e.g. layers characterised by the chemical composition
    • H10P14/3424—Deposited materials, e.g. layers characterised by the chemical composition being Group IIB-VIA materials
    • H10P14/3432—Tellurides
    • 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
    • H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
    • H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
    • H10P14/34—Deposited materials, e.g. layers
    • H10P14/3438—Doping during depositing
    • H10P14/3441—Conductivity type
    • H10P14/3442—N-type
    • 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
    • H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
    • H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
    • H10P14/34—Deposited materials, e.g. layers
    • H10P14/3438—Doping during depositing
    • H10P14/3441—Conductivity type
    • H10P14/3444—P-type

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
DE19853526824 1984-07-26 1985-07-26 Verfahren zum bilden eines monokristallinen duennen films aus einem verbindungshalbleiter Granted DE3526824A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/077,119 US5693139A (en) 1984-07-26 1993-06-15 Growth of doped semiconductor monolayers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59153977A JPH0782991B2 (ja) 1984-07-26 1984-07-26 化合物半導体単結晶薄膜の成長法
JP59153980A JPH0715884B2 (ja) 1984-07-26 1984-07-26 選択型結晶の成長方法

Publications (2)

Publication Number Publication Date
DE3526824A1 true DE3526824A1 (de) 1986-02-06
DE3526824C2 DE3526824C2 (enExample) 1990-04-05

Family

ID=26482431

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853526824 Granted DE3526824A1 (de) 1984-07-26 1985-07-26 Verfahren zum bilden eines monokristallinen duennen films aus einem verbindungshalbleiter

Country Status (3)

Country Link
DE (1) DE3526824A1 (enExample)
FR (1) FR2578680B1 (enExample)
GB (1) GB2162862B (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3616358A1 (de) * 1985-05-15 1986-11-20 Hitoshi Sendai Miyagi Abe Verfahren zum aufwachsen einer gaas-einkristallschicht
US5443033A (en) * 1984-07-26 1995-08-22 Research Development Corporation Of Japan Semiconductor crystal growth method

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2577550B2 (ja) * 1986-11-20 1997-02-05 新技術事業団 ▲ｉｉｉ▼−▲ｖ▼族化合物半導体単結晶薄膜の不純物添加法
US4767494A (en) * 1986-07-04 1988-08-30 Nippon Telegraph & Telephone Corporation Preparation process of compound semiconductor
JP2587623B2 (ja) * 1986-11-22 1997-03-05 新技術事業団 化合物半導体のエピタキシヤル結晶成長方法
GB8629496D0 (en) * 1986-12-10 1987-01-21 British Petroleum Co Plc Silicon carbide
EP0312202A1 (en) * 1987-08-24 1989-04-19 Canon Kabushiki Kaisha Crystal formation method
ATE112418T1 (de) * 1988-06-03 1994-10-15 Ibm Verfahren zur herstellung künstlicher hochtemperatur-supraleiter mit mehrschichtiger struktur.
DE68909395T2 (de) * 1989-02-10 1994-02-17 Toshiba Kawasaki Kk Verfahren zur Ablagerung eines dünnen Oxydfilms.
DE4017966C2 (de) * 1990-06-05 1996-05-30 Ppm Pure Metals Gmbh Verwendung elementorganischer Verbindungen zur Abscheidung aus der Gasphase
US5270247A (en) * 1991-07-12 1993-12-14 Fujitsu Limited Atomic layer epitaxy of compound semiconductor
JP3298572B2 (ja) 1997-09-30 2002-07-02 日本電気株式会社 光半導体装置の製造方法
JP3045115B2 (ja) * 1997-09-30 2000-05-29 日本電気株式会社 光半導体装置の製造方法
US6576053B1 (en) 1999-10-06 2003-06-10 Samsung Electronics Co., Ltd. Method of forming thin film using atomic layer deposition method
TW515032B (en) * 1999-10-06 2002-12-21 Samsung Electronics Co Ltd Method of forming thin film using atomic layer deposition method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1900116A1 (de) * 1969-01-02 1970-08-06 Siemens Ag Verfahren zum epitaktischen Abscheiden von Silicium bei niedrigen Temperaturen
DE2411603A1 (de) * 1973-03-15 1974-09-26 Nippon Electric Co Verfahren zur herstellung einer epitaktischen schicht und nach diesem verfahren hergestellte epitaktische schicht
US4058430A (en) * 1974-11-29 1977-11-15 Tuomo Suntola Method for producing compound thin films
DD153899A5 (de) * 1980-02-26 1982-02-10 Lohja Ab Oy Verfahren und vorrichtung zur durchfuehrung des wachstums von zusammengesetzten duennen schichten

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI57975C (fi) * 1979-02-28 1980-11-10 Lohja Ab Oy Foerfarande och anordning vid uppbyggande av tunna foereningshinnor
JPS5898917A (ja) * 1981-12-09 1983-06-13 Seiko Epson Corp 原子層エビタキシヤル装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1900116A1 (de) * 1969-01-02 1970-08-06 Siemens Ag Verfahren zum epitaktischen Abscheiden von Silicium bei niedrigen Temperaturen
DE2411603A1 (de) * 1973-03-15 1974-09-26 Nippon Electric Co Verfahren zur herstellung einer epitaktischen schicht und nach diesem verfahren hergestellte epitaktische schicht
US4058430A (en) * 1974-11-29 1977-11-15 Tuomo Suntola Method for producing compound thin films
DD153899A5 (de) * 1980-02-26 1982-02-10 Lohja Ab Oy Verfahren und vorrichtung zur durchfuehrung des wachstums von zusammengesetzten duennen schichten

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443033A (en) * 1984-07-26 1995-08-22 Research Development Corporation Of Japan Semiconductor crystal growth method
US6464793B1 (en) 1984-07-26 2002-10-15 Research Development Corporation Of Japan Semiconductor crystal growth apparatus
DE3616358A1 (de) * 1985-05-15 1986-11-20 Hitoshi Sendai Miyagi Abe Verfahren zum aufwachsen einer gaas-einkristallschicht

Also Published As

Publication number Publication date
GB2162862A (en) 1986-02-12
GB2162862B (en) 1988-10-19
DE3526824C2 (enExample) 1990-04-05
FR2578680B1 (fr) 1990-10-26
GB8518834D0 (en) 1985-08-29
FR2578680A1 (fr) 1986-09-12

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OP8 Request for examination as to paragraph 44 patent law
8127 New person/name/address of the applicant

Owner name: RESEARCH DEVELOPMENT CORP. OF JAPAN, TOKIO/TOKYO,

D2 Grant after examination
8364 No opposition during term of opposition