DE1255820B - Method for contacting a body made of a semiconducting selelide or telluride of a divalent metal - Google Patents
Method for contacting a body made of a semiconducting selelide or telluride of a divalent metalInfo
- Publication number
- DE1255820B DE1255820B DEN11528A DEN0011528A DE1255820B DE 1255820 B DE1255820 B DE 1255820B DE N11528 A DEN11528 A DE N11528A DE N0011528 A DEN0011528 A DE N0011528A DE 1255820 B DE1255820 B DE 1255820B
- Authority
- DE
- Germany
- Prior art keywords
- solution
- layer
- metal
- contact
- telluride
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 33
- 239000002184 metal Substances 0.000 title claims description 33
- 238000000034 method Methods 0.000 title claims description 14
- XSOKHXFFCGXDJZ-UHFFFAOYSA-N telluride(2-) Chemical compound [Te-2] XSOKHXFFCGXDJZ-UHFFFAOYSA-N 0.000 title claims description 10
- 239000004065 semiconductor Substances 0.000 claims description 11
- 150000003839 salts Chemical class 0.000 claims description 7
- 229910052753 mercury Inorganic materials 0.000 claims description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 6
- 229910000510 noble metal Inorganic materials 0.000 claims description 3
- 238000007740 vapor deposition Methods 0.000 claims description 3
- 150000001768 cations Chemical class 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims 16
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims 6
- 229910003803 Gold(III) chloride Inorganic materials 0.000 claims 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 5
- 229910052737 gold Inorganic materials 0.000 claims 5
- 239000010931 gold Substances 0.000 claims 5
- RJHLTVSLYWWTEF-UHFFFAOYSA-K gold trichloride Chemical compound Cl[Au](Cl)Cl RJHLTVSLYWWTEF-UHFFFAOYSA-K 0.000 claims 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 4
- 229910004613 CdTe Inorganic materials 0.000 claims 3
- 150000003346 selenoethers Chemical class 0.000 claims 3
- 229910052709 silver Inorganic materials 0.000 claims 3
- 229910019029 PtCl4 Inorganic materials 0.000 claims 2
- 229910021604 Rhodium(III) chloride Inorganic materials 0.000 claims 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 claims 2
- 229910052741 iridium Inorganic materials 0.000 claims 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims 2
- 229910052703 rhodium Inorganic materials 0.000 claims 2
- 239000010948 rhodium Substances 0.000 claims 2
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 claims 2
- 239000004332 silver Substances 0.000 claims 2
- FBEIPJNQGITEBL-UHFFFAOYSA-J tetrachloroplatinum Chemical compound Cl[Pt](Cl)(Cl)Cl FBEIPJNQGITEBL-UHFFFAOYSA-J 0.000 claims 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000002800 charge carrier Substances 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 230000001771 impaired effect Effects 0.000 claims 1
- 229910052738 indium Inorganic materials 0.000 claims 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims 1
- 150000002500 ions Chemical class 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 229910021645 metal ion Inorganic materials 0.000 claims 1
- 239000012299 nitrogen atmosphere Substances 0.000 claims 1
- 229910052697 platinum Inorganic materials 0.000 claims 1
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 claims 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims 1
- 239000012266 salt solution Substances 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 claims 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims 1
- 229910052721 tungsten Inorganic materials 0.000 claims 1
- 239000010937 tungsten Substances 0.000 claims 1
- 150000004771 selenides Chemical class 0.000 description 6
- 239000004020 conductor Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 150000004772 tellurides Chemical class 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229940100890 silver compound Drugs 0.000 description 1
- 150000003379 silver compounds Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor 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
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
-
- 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
-
- 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
- H01L21/06—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 selenium or tellurium in uncombined form other than as impurities in semiconductor bodies of other materials
-
- 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
- H01L21/34—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 not provided for in groups H01L21/0405, H01L21/0445, H01L21/06, H01L21/16 and H01L21/18 with or without impurities, e.g. doping materials
- H01L21/44—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/38 - H01L21/428
- H01L21/441—Deposition of conductive or insulating materials for electrodes
-
- 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
- H01L21/34—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 not provided for in groups H01L21/0405, H01L21/0445, H01L21/06, H01L21/16 and H01L21/18 with or without impurities, e.g. doping materials
- H01L21/44—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/38 - H01L21/428
- H01L21/441—Deposition of conductive or insulating materials for electrodes
- H01L21/445—Deposition of conductive or insulating materials for electrodes from a liquid, e.g. electrolytic deposition
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24917—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Electrodes Of Semiconductors (AREA)
- Electrolytic Production Of Metals (AREA)
Description
DeutscheKl.: 21g-11/02 German class: 21g-11/02
AUSLEGESCHRIFTEDITORIAL
Nummer: 1 255 820Number: 1 255 820
Aktenzeichen: N11528 VIII c/21:File number: N11528 VIII c / 21:
1 255 820 Anmeldetag: 2.Dezember 19551 255 820 filing date: December 2, 1955
Auslegetag: 7. Dezember 1967Opened on: December 7, 1967
Die Erfindung betrifft ein Verfahren zur Kontaktierung eines Körpers aus einem p-halbleitenden Selenid oder Tellurid eines zweiwertigen Metalls mit einem ohmschen Kontakt bzw. aus einem n-halbleitenden SeIenid oder Tellurid mit einem gleichrichtenden Kontakt, insbesondere für Halbleiterbauelemente, wie Photodioden, Phototransistoren, Transistoren, Kristalldioden od. dgl.The invention relates to a method for contacting a body made of a p-semiconducting selenide or telluride of a divalent metal with an ohmic contact or from an n-semiconducting one SeIenid or Telluride with a rectifying contact, especially for semiconductor components, such as photodiodes, phototransistors, transistors, crystal diodes or the like.
Der halbleitende Körper besteht dabei aus Seleniden oder Telluriden der Metalle Zn, Cd, Hg, Sn und Pb. Zum Aufbringen von Metallschichten auf Halbleiterkörpern sind verschiedene Verfahren bekannt, z. B. Aufdampfen, Aufbrennen von Suspensionen oder zersetzbaren Silberverbindungen und das elektrische Aufbringen von Metallschichten.The semiconducting body consists of selenides or tellurides of the metals Zn, Cd, Hg, Sn and Pb. Various methods are known for applying metal layers to semiconductor bodies, z. B. vapor deposition, burning of suspensions or decomposable silver compounds and that electrical application of metal layers.
Eine so aufgebrachte Metallschicht bildet gewöhnlich mit dem Halbleiterkörper elektrisch schlechte Kontakte mit Gleichrichtereigenschaften. So haben z. B. auf elektrischem Wege aufgebrachte Metallschichten sowohl auf η-leitendem als auch auf p-lei- ao tendem Material Gleichrichtereigenschaften.A metal layer applied in this way usually forms electrically poor contacts with the semiconductor body with rectifier properties. So have z. B. electrical means applied metal layers on both η-type as well as p-managerial ao tendem material rectifying characteristics.
Diese Verfahren sind darüber hinaus besonders aufwendig. So ist für das Aufdampfen eine Vakuumanlage erforderlich; für das Aufbringen müssen besondere Maßnahmen getroffen werden, um sicherzustellen, daß die erforderlichen hohen Temperaturen keine Umsetzungen herbeiführen; für das Aufbringen auf elektrolytischem Wege ist die Anwendung einer Elektrolyseanlage erforderlich.In addition, these processes are particularly complex. So is a vacuum system for vapor deposition necessary; For the application, special measures must be taken to ensure that that the high temperatures required do not bring about any reactions; for applying electrolytically, the use of an electrolysis system is required.
Der Erfindung liegt nun die Aufgabe zugrunde, ein Verfahren zu schaffen, nach dem es möglich ist, auf einem aus einem Selenid oder Tellurid eines zweiwertigen Metalls bestehenden Halbleiterkörper auf einfache Weise eine Metallschicht aufzubringen, die einen guten ohmschen oder gleichrichtenden Kontakt mit dem Halbleiterkörper bildet.The invention is now based on the object of creating a method according to which it is possible on a semiconductor body consisting of a selenide or telluride of a divalent metal easy way to apply a metal layer that has a good ohmic or rectifying contact forms with the semiconductor body.
Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß der halbleitende Körper mit einer solchen Lösung eines Metallsalzes, dessen Kation ein Edelmetall oder Quecksilber ist, in Berührung gebracht wird, daß unter Abscheidung des Metalls aus der Lösung an der Oberfläche des Körpers das zweiwertige Metall aus dem Selenid oder Tellurid in Lösung geht. Es handelt sich also nicht um ein Salz, in dem das Metall in Komplexform vorliegt.According to the invention, this object is achieved in that the semiconducting body has such a Solution of a metal salt, the cation of which is a noble metal or mercury, brought into contact becomes that with the deposition of the metal from the solution on the surface of the body the divalent Metal from the selenide or telluride goes into solution. So it is not a question of a salt in which the metal is in complex form.
Der Vollständigkeit halber sei noch erwähnt, daß bereits vorgeschlagen worden ist, bei der Kontaktierung von Halbleiterkörpern nach einer besonderen Vorbehandlung der Halbleiteroberfläche durch Ätzen oder durch Abtragen mittels einer wasserfreien Schmelze die Halbleiteroberfläche durch Ionenaustausch zu metallisieren.For the sake of completeness, it should also be mentioned that it has already been suggested when making contact of semiconductor bodies after a special pretreatment of the semiconductor surface by etching or by removing the semiconductor surface by means of an anhydrous melt by means of ion exchange to metallize.
Verfahren zur Kontaktierung eines Körpers aus
einem halbleitenden Selelid oder Tellurid
eines zweiwertigen MetallsMethod for contacting a body
a semiconducting selelid or telluride
of a divalent metal
Anmelder:Applicant:
N. V. Philips' Gloeilampenfabrieken,
Eindhoven (Niederlande)NV Philips' Gloeilampenfabrieken,
Eindhoven (Netherlands)
Vertreter:Representative:
Dipl.-Ing. E. E. Walther, Patentanwalt,
Hamburg 1, Mönckebergstr. 7Dipl.-Ing. EE Walther, patent attorney,
Hamburg 1, Mönckebergstr. 7th
Als Erfinder benannt:Named as inventor:
Dirk de Nobel, Eindhoven (Niederlande)Dirk de Nobel, Eindhoven (Netherlands)
Beanspruchte Priorität:Claimed priority:
Niederlande vom 6. Dezember 1954 (192 972)Netherlands 6 December 1954 (192 972)
Das Verfahren nach der Erfindung hat den besonderen Vorteil, daß gerade bei halbleitenden Seleniden oder Telluriden eines zweiwertigen Metalls sich ausgezeichnete ohmsche oder gleichrichtende Kontakte in vorteilhafter und einfacher Weise herstellen lassen.The method according to the invention has the particular advantage that especially with semiconducting selenides or tellurides of a divalent metal are excellent ohmic or rectifying contacts can be produced in an advantageous and simple manner.
Dies beruht auf dem besonderen Effekt, daß sich durch Ionenaustausch unterhalb des sich abscheidenden Metalls durch Lösung des zweiwertigen Metalls des Selenids oder Tellurids eine dünne Schicht bildet, in der die Konzentration an zweiwertigen Metallatomen vermindert ist. Dadurch entsteht eine Verschiebung der Leitfähigkeit dieser Schicht in Richtung von der η-Leitfähigkeit auf die p-Leitfähigkeit hin, so daß auf p-leitendem Material gute ohmsche und auf η-leitendem Material gute gleichrichtende Kontakte herstellbar sind.This is based on the special effect that by ion exchange below the separating Metal forms a thin layer by dissolving the bivalent metal of selenide or telluride, in which the concentration of divalent metal atoms is reduced. This creates a Shift of the conductivity of this layer in the direction of the η-conductivity to the p-conductivity so that on p-conductive material good ohmic and on η-conductive material good rectifying Contacts can be produced.
Einerseits sind die elektrischen Eigenschaften der nach dem erfindungsgemäßen Verfahren aufgebrachten Kontakte, z. B. ihre Gleichrichtereigenschaften, besonders gut wegen des bereits erwähnten Vorhandenseins einer dünnen Halbleiterschicht geringerer Konzentration an zweiwertigen Metallatomen, die während des Aufbringens unter der Metallschicht entstanden ist, andererseits kann jedoch eine andere Eigenschaft der Metallschicht selbst, z. B. ihre Lichtdurchlässigkeit, weniger günstig sein. Die Metallschicht kann dann, z. B. durch Lösen, völlig oderOn the one hand, the electrical properties are those applied by the method according to the invention Contacts, e.g. B. their rectifier properties, particularly good because of the already mentioned presence a thin semiconductor layer with a lower concentration of divalent metal atoms, which was created during the application under the metal layer, on the other hand, however, another can Property of the metal layer itself, e.g. B. their transparency, be less favorable. The metal layer can then, for. B. by solving, completely or
709 707/462709 707/462
Claims (3)
Deutsche Patente Nr. 1 000 533, 1052 575.Legacy Patents Considered:
German patents No. 1 000 533, 1052 575.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL354169X | 1954-12-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1255820B true DE1255820B (en) | 1967-12-07 |
Family
ID=19785152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEN11528A Pending DE1255820B (en) | 1954-12-06 | 1955-12-02 | Method for contacting a body made of a semiconducting selelide or telluride of a divalent metal |
Country Status (7)
Country | Link |
---|---|
US (1) | US2865793A (en) |
BE (1) | BE543390A (en) |
CH (1) | CH354169A (en) |
DE (1) | DE1255820B (en) |
FR (1) | FR1143213A (en) |
GB (1) | GB800557A (en) |
NL (2) | NL99205C (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3187414A (en) * | 1959-02-05 | 1965-06-08 | Baldwin Co D H | Method of producing a photocell assembly |
NL251613A (en) * | 1960-05-13 | |||
US3208835A (en) * | 1961-04-27 | 1965-09-28 | Westinghouse Electric Corp | Thermoelectric members |
US3271591A (en) * | 1963-09-20 | 1966-09-06 | Energy Conversion Devices Inc | Symmetrical current controlling device |
US3366518A (en) * | 1964-07-01 | 1968-01-30 | Ibm | High sensitivity diodes |
US3523038A (en) * | 1965-06-02 | 1970-08-04 | Texas Instruments Inc | Process for making ohmic contact to planar germanium semiconductor devices |
US4468685A (en) * | 1980-03-27 | 1984-08-28 | Farrow Robin F C | Infrared detector using grey tin |
FR2844918B1 (en) * | 2002-09-20 | 2005-07-01 | Commissariat Energie Atomique | PROCESS FOR PRODUCING ELECTRODES ON SEMI-CONDUCTOR MATERIAL TYPE II-VI OR A COMPOUND THEREOF |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2560979A (en) * | 1948-07-30 | 1951-07-17 | Padio Corp Of America | Chemical deposition of metallic films |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2677715A (en) * | 1950-09-23 | 1954-05-04 | Alois Vogt Dr | Optical-electrical conversion device comprising a light-permeable metal electrode |
US2710813A (en) * | 1951-01-02 | 1955-06-14 | Rca Corp | Cadmium selenide-zinc selenide photoconductive electrode and method of producing same |
-
0
- BE BE543390D patent/BE543390A/xx unknown
- NL NL192972D patent/NL192972A/xx unknown
- NL NL99205D patent/NL99205C/xx active
-
1955
- 1955-11-29 US US549754A patent/US2865793A/en not_active Expired - Lifetime
- 1955-12-02 DE DEN11528A patent/DE1255820B/en active Pending
- 1955-12-02 GB GB34561/55A patent/GB800557A/en not_active Expired
- 1955-12-05 CH CH354169D patent/CH354169A/en unknown
- 1955-12-05 FR FR1143213D patent/FR1143213A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2560979A (en) * | 1948-07-30 | 1951-07-17 | Padio Corp Of America | Chemical deposition of metallic films |
Also Published As
Publication number | Publication date |
---|---|
NL192972A (en) | |
NL99205C (en) | |
GB800557A (en) | 1958-08-27 |
FR1143213A (en) | 1957-09-27 |
BE543390A (en) | |
CH354169A (en) | 1961-05-15 |
US2865793A (en) | 1958-12-23 |
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