FR2053770A5 - Electrolytic deposition of gold-bismuth - alloys - Google Patents

Electrolytic deposition of gold-bismuth - alloys

Info

Publication number
FR2053770A5
FR2053770A5 FR6924342A FR6924342A FR2053770A5 FR 2053770 A5 FR2053770 A5 FR 2053770A5 FR 6924342 A FR6924342 A FR 6924342A FR 6924342 A FR6924342 A FR 6924342A FR 2053770 A5 FR2053770 A5 FR 2053770A5
Authority
FR
France
Prior art keywords
bismuth
alloys
gold
electrolytic deposition
alkali metal
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
FR6924342A
Other languages
French (fr)
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.)
Radiotechnique Compelec RTC SA
Original Assignee
Radiotechnique Compelec RTC SA
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 Radiotechnique Compelec RTC SA filed Critical Radiotechnique Compelec RTC SA
Priority to FR6924342A priority Critical patent/FR2053770A5/en
Application granted granted Critical
Publication of FR2053770A5 publication Critical patent/FR2053770A5/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/62—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of gold
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys

Landscapes

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

Abstract

Gold and bismuth are electrolytically co-deposited from a solution containing, preferably 12 g/l gold as an alkali metal auricyanide, and bismuth as the salt of a weak acid, preferably citric acid. Alkali metal citrate and citric acid are preferably used to buffer the soln. at pH 4-8, pref. 7. The bismuth concentration used depends on the alloy required and the current density. Alloys with bismuth concentrations above 35% are used for microcircuit encapsulation, while alloys with less than 20% bismuth are used as sputtering cathodes.
FR6924342A 1969-07-17 1969-07-17 Electrolytic deposition of gold-bismuth - alloys Expired FR2053770A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR6924342A FR2053770A5 (en) 1969-07-17 1969-07-17 Electrolytic deposition of gold-bismuth - alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6924342A FR2053770A5 (en) 1969-07-17 1969-07-17 Electrolytic deposition of gold-bismuth - alloys

Publications (1)

Publication Number Publication Date
FR2053770A5 true FR2053770A5 (en) 1971-04-16

Family

ID=9037590

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6924342A Expired FR2053770A5 (en) 1969-07-17 1969-07-17 Electrolytic deposition of gold-bismuth - alloys

Country Status (1)

Country Link
FR (1) FR2053770A5 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126921A2 (en) * 1983-05-27 1984-12-05 Schering Aktiengesellschaft Bath for the galvanic deposition of gold alloys
EP0384227A1 (en) * 1989-02-24 1990-08-29 Degussa Ag Bath for the galvanic deposition of pure gold coatings
US7465385B2 (en) 2005-06-02 2008-12-16 Rohm And Haas Electronic Materials Llc Gold alloy electrolytes
US8142637B2 (en) 2005-06-02 2012-03-27 Rohm And Haas Electronic Materials Llc Gold alloy electrolytes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126921A2 (en) * 1983-05-27 1984-12-05 Schering Aktiengesellschaft Bath for the galvanic deposition of gold alloys
EP0126921A3 (en) * 1983-05-27 1985-01-30 Schering Aktiengesellschaft Berlin Und Bergkamen Bath for the galvanic deposition of gold alloys
EP0384227A1 (en) * 1989-02-24 1990-08-29 Degussa Ag Bath for the galvanic deposition of pure gold coatings
US7465385B2 (en) 2005-06-02 2008-12-16 Rohm And Haas Electronic Materials Llc Gold alloy electrolytes
US8142637B2 (en) 2005-06-02 2012-03-27 Rohm And Haas Electronic Materials Llc Gold alloy electrolytes

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Legal Events

Date Code Title Description
ST Notification of lapse