GB1322670A - Apparatus for metal evaporation coating - Google Patents
Apparatus for metal evaporation coatingInfo
- Publication number
- GB1322670A GB1322670A GB3537971A GB1322670DA GB1322670A GB 1322670 A GB1322670 A GB 1322670A GB 3537971 A GB3537971 A GB 3537971A GB 1322670D A GB1322670D A GB 1322670DA GB 1322670 A GB1322670 A GB 1322670A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- anode
- evaporation surface
- cooling
- evaporated
- 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
Links
- 239000011248 coating agent Substances 0.000 title abstract 2
- 238000000576 coating method Methods 0.000 title abstract 2
- 238000001883 metal evaporation Methods 0.000 title 1
- 230000008020 evaporation Effects 0.000 abstract 5
- 238000001704 evaporation Methods 0.000 abstract 5
- 229910052751 metal Inorganic materials 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 3
- 238000001816 cooling Methods 0.000 abstract 2
- 239000000758 substrate Substances 0.000 abstract 2
- 229910052793 cadmium Inorganic materials 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 239000000110 cooling liquid Substances 0.000 abstract 1
- 230000008021 deposition Effects 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 abstract 1
- 229910052745 lead Inorganic materials 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 210000002445 nipple Anatomy 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- 229910052718 tin Inorganic materials 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32055—Arc discharge
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
- C23C14/325—Electric arc evaporation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physical Vapour Deposition (AREA)
- Manufacture And Refinement Of Metals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16375771A | 1971-07-19 | 1971-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1322670A true GB1322670A (en) | 1973-07-11 |
Family
ID=22591432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3537971A Expired GB1322670A (en) | 1971-07-19 | 1971-07-28 | Apparatus for metal evaporation coating |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3793179A (https=) |
| DE (1) | DE2136532C3 (https=) |
| FR (1) | FR2147880B1 (https=) |
| GB (1) | GB1322670A (https=) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309315A (en) | 1978-12-27 | 1982-01-05 | Nissan Motor Company, Ltd. | Surface-activated functional materials and a method of producing the same |
| GB2139648A (en) * | 1983-05-13 | 1984-11-14 | Wedtech Corp | Method of and apparatus for the coating of a substrate with material electrically transformed into a vapour phase |
| GB2140040A (en) * | 1983-05-09 | 1984-11-21 | Vac Tec Syst | Evaporation arc stabilization |
| GB2148329A (en) * | 1983-09-12 | 1985-05-30 | Vac Tec Syst | Improved method and apparatus for evaporation arc stabilization including initial target cleaning |
| GB2150947A (en) * | 1983-12-07 | 1985-07-10 | Vac Tec Syst | Evaporation arc stabilization for non-permeable targets utilizing permeable stop ring |
| US4537794A (en) * | 1981-02-24 | 1985-08-27 | Wedtech Corp. | Method of coating ceramics |
| GB2156384A (en) * | 1981-02-24 | 1985-10-09 | Wedtech Corp | Apparatus for vapour deposition by arc discharge |
| GB2159540A (en) * | 1984-05-25 | 1985-12-04 | Wedtech Corp | Apparatus and methods for coating substrates |
| US4596719A (en) * | 1981-02-24 | 1986-06-24 | Wedtech Corp. | Multilayer coating method and apparatus |
| DE3529813A1 (de) * | 1984-12-20 | 1986-07-03 | Vladimir Petrovic Petrakov | Verfahren zur ionenplasma-aufdampfung und anlage zur durchfuehrung dieses verfahrens |
| DE3707545A1 (de) * | 1987-02-03 | 1988-08-11 | Balzers Hochvakuum | Anordnung zur stabilisierung eines lichtbogens zwischen einer anode und einer kathode |
| US5096558A (en) * | 1984-04-12 | 1992-03-17 | Plasco Dr. Ehrich Plasma - Coating Gmbh | Method and apparatus for evaporating material in vacuum |
| DE9207046U1 (de) * | 1992-05-25 | 1992-07-23 | VTD-Vakuumtechnik Dresden GmbH, O-8017 Dresden | Zündeinrichtung für einen Vakuumbogenentladungsverdampfer |
| RU2214476C2 (ru) * | 2001-07-18 | 2003-10-20 | Дочернее государственное предприятие "Институт ядерной физики" Национального ядерного центра Республики Казахстан | Способ формирования покрытия из драгоценных металлов и их сплавов |
| RU2214477C2 (ru) * | 2001-07-18 | 2003-10-20 | Дочернее государственное предприятие "Институт ядерной физики" Национального ядерного центра Республики Казахстан | Установка для напыления покрытий |
Families Citing this family (71)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1040631A1 (ru) * | 1980-06-25 | 1983-09-07 | Предприятие П/Я В-8851 | Вакуумно-дуговое устройство |
| US4512867A (en) * | 1981-11-24 | 1985-04-23 | Andreev Anatoly A | Method and apparatus for controlling plasma generation in vapor deposition |
| AT376460B (de) * | 1982-09-17 | 1984-11-26 | Kljuchko Gennady V | Plasmalichtbogeneinrichtung zum auftragen von ueberzuegen |
| US4448799A (en) * | 1983-04-21 | 1984-05-15 | Multi-Arc Vacuum Systems Inc. | Arc-initiating trigger apparatus and method for electric arc vapor deposition coating systems |
| US4559121A (en) * | 1983-09-12 | 1985-12-17 | Vac-Tec Systems, Inc. | Method and apparatus for evaporation arc stabilization for permeable targets |
| US4430184A (en) | 1983-05-09 | 1984-02-07 | Vac-Tec Systems, Inc. | Evaporation arc stabilization |
| US4622452A (en) * | 1983-07-21 | 1986-11-11 | Multi-Arc Vacuum Systems, Inc. | Electric arc vapor deposition electrode apparatus |
| US4559125A (en) * | 1983-09-12 | 1985-12-17 | Vac-Tec Systems, Inc. | Apparatus for evaporation arc stabilization during the initial clean-up of an arc target |
| US4600489A (en) * | 1984-01-19 | 1986-07-15 | Vac-Tec Systems, Inc. | Method and apparatus for evaporation arc stabilization for non-permeable targets utilizing permeable stop ring |
| US4895765A (en) * | 1985-09-30 | 1990-01-23 | Union Carbide Corporation | Titanium nitride and zirconium nitride coating compositions, coated articles and methods of manufacture |
| US4929322A (en) * | 1985-09-30 | 1990-05-29 | Union Carbide Corporation | Apparatus and process for arc vapor depositing a coating in an evacuated chamber |
| US4839245A (en) * | 1985-09-30 | 1989-06-13 | Union Carbide Corporation | Zirconium nitride coated article and method for making same |
| US4620913A (en) * | 1985-11-15 | 1986-11-04 | Multi-Arc Vacuum Systems, Inc. | Electric arc vapor deposition method and apparatus |
| CH671238A5 (https=) * | 1986-11-06 | 1989-08-15 | Vni Instrument Inst | |
| US5215640A (en) * | 1987-02-03 | 1993-06-01 | Balzers Ag | Method and arrangement for stabilizing an arc between an anode and a cathode particularly for vacuum coating devices |
| FR2612204A1 (fr) * | 1987-03-12 | 1988-09-16 | Vac Tec Syst | Procede et appareil pour le depot par un plasma d'arc electrique sous vide de revetements decoratifs et de revetements resistant a l'usure |
| DE3781551T2 (de) * | 1987-06-29 | 1993-04-08 | Hauzer Holding | Verfahren und vorrichtung zur beschichtung von aushoehlungen von gegenstaenden. |
| US4943325A (en) * | 1988-10-19 | 1990-07-24 | Black & Veatch, Engineers-Architects | Reflector assembly |
| JP2718731B2 (ja) * | 1988-12-21 | 1998-02-25 | 株式会社神戸製鋼所 | 真空アーク蒸着装置及び真空アーク蒸着方法 |
| US4936960A (en) * | 1989-01-03 | 1990-06-26 | Advanced Energy Industries, Inc. | Method and apparatus for recovery from low impedance condition during cathodic arc processes |
| DE4006456C1 (en) * | 1990-03-01 | 1991-05-29 | Balzers Ag, Balzers, Li | Appts. for vaporising material in vacuum - has electron beam gun or laser guided by electromagnet to form cloud or pre-melted spot on the target surface |
| US5238546A (en) * | 1990-03-01 | 1993-08-24 | Balzers Aktiengesellschaft | Method and apparatus for vaporizing materials by plasma arc discharge |
| US5037522B1 (en) * | 1990-07-24 | 1996-07-02 | Vergason Technology Inc | Electric arc vapor deposition device |
| US5858456A (en) * | 1991-02-06 | 1999-01-12 | Applied Vacuum Technologies 1 Ab | Method for metal coating discrete objects by vapor deposition |
| CA2065581C (en) | 1991-04-22 | 2002-03-12 | Andal Corp. | Plasma enhancement apparatus and method for physical vapor deposition |
| WO1992019789A1 (fr) * | 1991-04-29 | 1992-11-12 | Nauchno-Proizvodstvennoe Predpriyatie 'novatekh' | Evaporateur a arc electrique de metaux |
| DE4125365C1 (https=) * | 1991-07-31 | 1992-05-21 | Multi-Arc Oberflaechentechnik Gmbh, 5060 Bergisch Gladbach, De | |
| IT1253065B (it) * | 1991-12-13 | 1995-07-10 | Unicoat Srl | Vaporizzatore ad arco voltaico |
| US5282944A (en) * | 1992-07-30 | 1994-02-01 | The United States Of America As Represented By The United States Department Of Energy | Ion source based on the cathodic arc |
| US5380421A (en) * | 1992-11-04 | 1995-01-10 | Gorokhovsky; Vladimir I. | Vacuum-arc plasma source |
| EP0677595B1 (en) * | 1992-12-30 | 1998-04-01 | Scientific-Industrial Enterprise NOVATECH | Device for the vacuum-plasma treatment of articles |
| EP0658634B1 (en) * | 1993-12-17 | 1999-03-10 | KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. | Vacuum arc deposition apparatus |
| US5480527A (en) * | 1994-04-25 | 1996-01-02 | Vapor Technologies, Inc. | Rectangular vacuum-arc plasma source |
| DE4441117C1 (de) * | 1994-11-18 | 1995-10-26 | Plasma Applikation Mbh Ges | Verfahren zur Beschichtung von Substraten und Vorrichtung zur Durchführung des Verfahrens |
| JP3287163B2 (ja) * | 1995-01-23 | 2002-05-27 | 日新電機株式会社 | アーク式蒸発源 |
| US5518597A (en) * | 1995-03-28 | 1996-05-21 | Minnesota Mining And Manufacturing Company | Cathodic arc coating apparatus and method |
| WO1996031899A1 (en) | 1995-04-07 | 1996-10-10 | Advanced Energy Industries, Inc. | Adjustable energy quantum thin film plasma processing system |
| CH689558A5 (de) | 1995-07-11 | 1999-06-15 | Erich Bergmann | Bedampfungsanlage und Verdampfereinheit. |
| US5656091A (en) * | 1995-11-02 | 1997-08-12 | Vacuum Plating Technology Corporation | Electric arc vapor deposition apparatus and method |
| US5895559A (en) * | 1996-04-08 | 1999-04-20 | Christy; Ronald | Cathodic arc cathode |
| DE19652633A1 (de) * | 1996-09-13 | 1998-03-19 | Euromat Gmbh | Verfahren und Vorrichtung zum Innenbeschichten metallischer Bauteile |
| DE19654336C2 (de) * | 1996-12-24 | 2002-12-12 | Bekaert Cmtm Gmbh | Oberflächenbehandlung von metallischen Bändern mittels magnetisch bewegten Lichtbogen |
| US6036828A (en) * | 1997-08-30 | 2000-03-14 | United Technologies Corporation | Apparatus for steering the arc in a cathodic arc coater |
| US6009829A (en) * | 1997-08-30 | 2000-01-04 | United Technologies Corporation | Apparatus for driving the arc in a cathodic arc coater |
| US5932078A (en) * | 1997-08-30 | 1999-08-03 | United Technologies Corporation | Cathodic arc vapor deposition apparatus |
| US5972185A (en) * | 1997-08-30 | 1999-10-26 | United Technologies Corporation | Cathodic arc vapor deposition apparatus (annular cathode) |
| DE19853943B4 (de) * | 1997-11-26 | 2006-04-20 | Vapor Technologies, Inc. (Delaware Corporation), Longmont | Katode zur Zerstäubung oder Bogenaufdampfung sowie Vorrichtung zur Beschichtung oder Ionenimplantation mit einer solchen Katode |
| US6103074A (en) * | 1998-02-14 | 2000-08-15 | Phygen, Inc. | Cathode arc vapor deposition method and apparatus |
| US5976636A (en) * | 1998-03-19 | 1999-11-02 | Industrial Technology Research Institute | Magnetic apparatus for arc ion plating |
| WO1999055929A1 (de) * | 1998-04-29 | 1999-11-04 | Unaxis Trading Ag | Werkzeug oder maschinenbauteil und verfahren zur verschleissfestigkeitserhöhung eines solchen teiles |
| US6929727B2 (en) * | 1999-04-12 | 2005-08-16 | G & H Technologies, Llc | Rectangular cathodic arc source and method of steering an arc spot |
| CA2268659C (en) * | 1999-04-12 | 2008-12-30 | Vladimir I. Gorokhovsky | Rectangular cathodic arc source and method of steering an arc spot |
| US5997705A (en) * | 1999-04-14 | 1999-12-07 | Vapor Technologies, Inc. | Rectangular filtered arc plasma source |
| CA2305938C (en) * | 2000-04-10 | 2007-07-03 | Vladimir I. Gorokhovsky | Filtered cathodic arc deposition method and apparatus |
| US7300559B2 (en) * | 2000-04-10 | 2007-11-27 | G & H Technologies Llc | Filtered cathodic arc deposition method and apparatus |
| US6402901B1 (en) * | 2001-03-16 | 2002-06-11 | 4 Wave, Inc. | System and method for performing sputter deposition using a spherical geometry |
| US6436254B1 (en) * | 2001-04-03 | 2002-08-20 | General Electric Company | Cathode mounting system for cathodic arc cathodes |
| US6936145B2 (en) * | 2002-02-28 | 2005-08-30 | Ionedge Corporation | Coating method and apparatus |
| DE10224991A1 (de) * | 2002-06-05 | 2004-01-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren und Einrichtung zur Reduzierung der Zündspannung von Plasmen |
| US6770178B2 (en) * | 2002-08-09 | 2004-08-03 | United Technologies Corporation | Cathodic arc disposable sting shielding |
| US20050176251A1 (en) * | 2004-02-05 | 2005-08-11 | Duong Chau H. | Polishing pad with releasable slick particles |
| US9997338B2 (en) * | 2005-03-24 | 2018-06-12 | Oerlikon Surface Solutions Ag, Pfäffikon | Method for operating a pulsed arc source |
| US7498587B2 (en) * | 2006-05-01 | 2009-03-03 | Vapor Technologies, Inc. | Bi-directional filtered arc plasma source |
| US20090065045A1 (en) * | 2007-09-10 | 2009-03-12 | Zenith Solar Ltd. | Solar electricity generation system |
| US9893223B2 (en) | 2010-11-16 | 2018-02-13 | Suncore Photovoltaics, Inc. | Solar electricity generation system |
| US9153422B2 (en) | 2011-08-02 | 2015-10-06 | Envaerospace, Inc. | Arc PVD plasma source and method of deposition of nanoimplanted coatings |
| US10304665B2 (en) | 2011-09-07 | 2019-05-28 | Nano-Product Engineering, LLC | Reactors for plasma-assisted processes and associated methods |
| JP3211579U (ja) * | 2014-08-04 | 2017-07-27 | スラサック スリンフォング | 陰極アークプラズマ蒸着システム内で使用するアークイオン蒸発器のフィルタ装置 |
| RU2710809C1 (ru) * | 2019-08-05 | 2020-01-14 | Общество с ограниченной ответственностью "НПП "Уралавиаспецтехнология" | Установка для нанесения ионно-плазменных покрытий |
| CN113957389B (zh) * | 2020-07-21 | 2023-08-11 | 宝山钢铁股份有限公司 | 一种具有多孔降噪及均匀化分配金属蒸汽的真空镀膜装置 |
| CN118756099B (zh) * | 2024-09-09 | 2024-12-17 | 湘潭宏大真空技术股份有限公司 | 一种用于af膜的蒸发镀膜装置 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2972695A (en) * | 1957-05-24 | 1961-02-21 | Vickers Electrical Co Ltd | Stabilisation of low pressure d.c. arc discharges |
| US3625848A (en) * | 1968-12-26 | 1971-12-07 | Alvin A Snaper | Arc deposition process and apparatus |
| DE1953659C3 (de) * | 1969-10-21 | 1979-01-25 | N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) | Ionenquelle für die Zerstäubung mit langsamen Ionen |
| US3661758A (en) * | 1970-06-26 | 1972-05-09 | Hewlett Packard Co | Rf sputtering system with the anode enclosing the target |
-
1971
- 1971-07-19 US US00163757A patent/US3793179A/en not_active Expired - Lifetime
- 1971-07-21 DE DE2136532A patent/DE2136532C3/de not_active Expired
- 1971-07-28 GB GB3537971A patent/GB1322670A/en not_active Expired
- 1971-08-05 FR FR7128763A patent/FR2147880B1/fr not_active Expired
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309315A (en) | 1978-12-27 | 1982-01-05 | Nissan Motor Company, Ltd. | Surface-activated functional materials and a method of producing the same |
| US4609564A (en) * | 1981-02-24 | 1986-09-02 | Wedtech Corp. | Method of and apparatus for the coating of a substrate with material electrically transformed into a vapor phase |
| US4537794A (en) * | 1981-02-24 | 1985-08-27 | Wedtech Corp. | Method of coating ceramics |
| GB2156384A (en) * | 1981-02-24 | 1985-10-09 | Wedtech Corp | Apparatus for vapour deposition by arc discharge |
| US4596719A (en) * | 1981-02-24 | 1986-06-24 | Wedtech Corp. | Multilayer coating method and apparatus |
| GB2140040A (en) * | 1983-05-09 | 1984-11-21 | Vac Tec Syst | Evaporation arc stabilization |
| GB2139648A (en) * | 1983-05-13 | 1984-11-14 | Wedtech Corp | Method of and apparatus for the coating of a substrate with material electrically transformed into a vapour phase |
| US4505948A (en) * | 1983-05-13 | 1985-03-19 | Wedtech Corp. | Method of coating ceramics and quartz crucibles with material electrically transformed into a vapor phase |
| GB2148329A (en) * | 1983-09-12 | 1985-05-30 | Vac Tec Syst | Improved method and apparatus for evaporation arc stabilization including initial target cleaning |
| GB2150947A (en) * | 1983-12-07 | 1985-07-10 | Vac Tec Syst | Evaporation arc stabilization for non-permeable targets utilizing permeable stop ring |
| US5096558A (en) * | 1984-04-12 | 1992-03-17 | Plasco Dr. Ehrich Plasma - Coating Gmbh | Method and apparatus for evaporating material in vacuum |
| GB2159540A (en) * | 1984-05-25 | 1985-12-04 | Wedtech Corp | Apparatus and methods for coating substrates |
| DE3529813A1 (de) * | 1984-12-20 | 1986-07-03 | Vladimir Petrovic Petrakov | Verfahren zur ionenplasma-aufdampfung und anlage zur durchfuehrung dieses verfahrens |
| DE3707545A1 (de) * | 1987-02-03 | 1988-08-11 | Balzers Hochvakuum | Anordnung zur stabilisierung eines lichtbogens zwischen einer anode und einer kathode |
| DE9207046U1 (de) * | 1992-05-25 | 1992-07-23 | VTD-Vakuumtechnik Dresden GmbH, O-8017 Dresden | Zündeinrichtung für einen Vakuumbogenentladungsverdampfer |
| RU2214476C2 (ru) * | 2001-07-18 | 2003-10-20 | Дочернее государственное предприятие "Институт ядерной физики" Национального ядерного центра Республики Казахстан | Способ формирования покрытия из драгоценных металлов и их сплавов |
| RU2214477C2 (ru) * | 2001-07-18 | 2003-10-20 | Дочернее государственное предприятие "Институт ядерной физики" Национального ядерного центра Республики Казахстан | Установка для напыления покрытий |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2147880A1 (https=) | 1973-03-11 |
| DE2136532B2 (de) | 1978-07-20 |
| US3793179A (en) | 1974-02-19 |
| FR2147880B1 (https=) | 1976-03-26 |
| DE2136532A1 (de) | 1973-02-08 |
| DE2136532C3 (de) | 1979-03-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PE20 | Patent expired after termination of 20 years |