GB956922A - Chemical gold plating - Google Patents

Chemical gold plating

Info

Publication number
GB956922A
GB956922A GB29612/62A GB2961262A GB956922A GB 956922 A GB956922 A GB 956922A GB 29612/62 A GB29612/62 A GB 29612/62A GB 2961262 A GB2961262 A GB 2961262A GB 956922 A GB956922 A GB 956922A
Authority
GB
United Kingdom
Prior art keywords
solution
palladium
gold
salt
soluble
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
GB29612/62A
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.)
Sel Rex Corp
Original Assignee
Sel Rex 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
Application filed by Sel Rex Corp filed Critical Sel Rex Corp
Publication of GB956922A publication Critical patent/GB956922A/en
Expired 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/42—Coating with noble metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemically Coating (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

In an electroless gold plating process the plating solution comprises an aqueous solution containing 0.5-30 g/l. of a soluble gold cyanide such as alkali gold cyanide and 0.01-30 g/l. of a soluble palladous salt. Suitable soluble palladium salts are palladium "p" salt (NH3)2Pd(NO2)2, disodium palladium tetrachloride Na2PdCl4, palladous chloride and sulphate. The solution may also contain up to 300 g/l. of an alkali salt of a weak acid and up to 100 g/l. of a weak acid such as phosphonic acid, acetic, propionic, kojic, maleic, tartaric, citric and ethylenediaminetetraacetic (E.D.T.A.) acids as complexing agents. The pH of the solution is maintained at 8-11 by addition of ammonium hydroxide. The gold may be deposited on copper or brass or a printed plastic board with copper circuit elements which has been etched in cuprous chloride, treated in 50% HCl, sensitized in stannous chloride and then catalyzed in PdCl2 solution. The palladium ions may be supplied to the solution by first applying the palladium to the substrate which is then immersed in a gold solution.
GB29612/62A 1961-08-28 1962-08-01 Chemical gold plating Expired GB956922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US134106A US3396042A (en) 1961-08-28 1961-08-28 Chemical gold plating composition

Publications (1)

Publication Number Publication Date
GB956922A true GB956922A (en) 1964-04-29

Family

ID=22461795

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29612/62A Expired GB956922A (en) 1961-08-28 1962-08-01 Chemical gold plating

Country Status (4)

Country Link
US (1) US3396042A (en)
CH (1) CH405868A (en)
DE (1) DE1446259B2 (en)
GB (1) GB956922A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3468676A (en) * 1963-09-09 1969-09-23 Photocircuits Corp Electroless gold plating
US3607352A (en) * 1968-11-29 1971-09-21 Enthone Electroless metal plating
US3993808A (en) * 1971-08-13 1976-11-23 Hitachi, Ltd. Method for electroless plating gold directly on tungsten or molybdenum
US3862850A (en) * 1973-06-08 1975-01-28 Ceramic Systems Electroless gold plating on refractory metals
US4091128A (en) * 1976-10-08 1978-05-23 Ppg Industries, Inc. Electroless gold plating bath
US4340451A (en) * 1979-12-17 1982-07-20 Bell Telephone Laboratories, Incorporated Method of replenishing gold/in plating baths
US4550036A (en) * 1984-10-18 1985-10-29 Hughes Aircraft Company Electroless silver plating process and system
US5178918A (en) * 1986-07-14 1993-01-12 Robert Duva Electroless plating process
US4863766A (en) * 1986-09-02 1989-09-05 General Electric Company Electroless gold plating composition and method for plating
US4832743A (en) * 1986-12-19 1989-05-23 Lamerie, N.V. Gold plating solutions, creams and baths
US6086946A (en) * 1996-08-08 2000-07-11 International Business Machines Corporation Method for electroless gold deposition in the presence of a palladium seeder and article produced thereby

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719821A (en) * 1951-07-19 1955-10-04 Charles R Campana Gold alloy plating bath

Also Published As

Publication number Publication date
DE1446259B2 (en) 1970-12-17
DE1446259A1 (en) 1968-11-14
CH405868A (en) 1966-01-15
US3396042A (en) 1968-08-06

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