DE3121509C2 - Bath for galvanic hard gold plating - Google Patents

Bath for galvanic hard gold plating

Info

Publication number
DE3121509C2
DE3121509C2 DE19813121509 DE3121509A DE3121509C2 DE 3121509 C2 DE3121509 C2 DE 3121509C2 DE 19813121509 DE19813121509 DE 19813121509 DE 3121509 A DE3121509 A DE 3121509A DE 3121509 C2 DE3121509 C2 DE 3121509C2
Authority
DE
Germany
Prior art keywords
gold
bath
cobalt
nitrilotriacetic acid
plating
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
DE19813121509
Other languages
German (de)
Other versions
DE3121509A1 (en
Inventor
Hans-Heinrich 8900 Augsburg Bahnsen
Erwin Widmann
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19813121509 priority Critical patent/DE3121509C2/en
Publication of DE3121509A1 publication Critical patent/DE3121509A1/en
Application granted granted Critical
Publication of DE3121509C2 publication Critical patent/DE3121509C2/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00Electroplating: Baths therefor
    • C25D3/02Electroplating: Baths therefor from solutions
    • C25D3/56Electroplating: Baths therefor from solutions of alloys
    • C25D3/62Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of gold
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00Electroplating: Baths therefor
    • C25D3/02Electroplating: Baths therefor from solutions
    • C25D3/48Electroplating: Baths therefor from solutions of gold
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/16Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending

Landscapes

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

Claims (2)

Patentansprüche:Patent claims: 1. Saures Bad auf Kaliumgoldzyanid-Basis zur galvanischen Hartvergoldung von Steckkontakten bei elektrischen Steckverbindern, insbesondere der Datentechnik, das Kaliumhydroxid und Kobaltsulfat enthält, dadurch gekennzeichnet, daß es als Leitsalz Apfelsäure und als Komplexbildner Nitrilotriessigsäure enthält1. Acid bath based on potassium gold cyanide for galvanic hard gold plating of plug contacts in electrical connectors, especially the Data technology that contains potassium hydroxide and cobalt sulfate, characterized in that it contains malic acid as conductive salt and nitrilotriacetic acid as complexing agent 2. Bad nach Anspruch 1, dadurch gekennzeichnet, daß es ein Molverhältnis von Kobalt zu Nitrilotriessigsäure zwischen 1 :2 und 1 :4 und einen pH-Wert zwischen 3,8 und 4,7 aufweist.2. Bath according to claim 1, characterized in that there is a molar ratio of cobalt to nitrilotriacetic acid between 1: 2 and 1: 4 and a pH between 3.8 and 4.7. Die Erfindung betrifft ein saures Bad auf Kaliumgoldzyanid-Basis zur galvanischen Hartvergoldung von Steckkontakten bei elektrischen Steckverbindern, insbesondere der Datentechnik, das Kaliumhydroxid und Kobaltsulfat enthält.The invention relates to an acidic bath based on potassium gold cyanide for galvanic hard gold plating of Plug contacts in electrical connectors, especially data technology, potassium hydroxide and Contains cobalt sulphate. In hochwertigen elektronischen Geräten sind die einzelnen Baugruppen vorwiegend über Steckverbinder miteinander verbunden. Die geforderte Kontaktqualität hinsichtlich Durchgangswiderstand und Abriebfestigkeit wird meistens mittels einer galvanisch abgeschiedenen Hartgoldschicht sichergestellt. Dazu benötigt man einen Hartgoldelektrolyten, der technisch einfach und wirtschaftlich arbeiten muß.In high-quality electronic devices, the individual assemblies are predominantly via connectors connected with each other. The required contact quality in terms of volume resistance and abrasion resistance is usually ensured by means of a galvanically deposited hard gold layer. For this you need a hard gold electrolyte that has to work simply and economically from a technical point of view. Aufgabe der vorliegenden Erfindung ist es, einen Elektrolyten zum hochwertigen Vergolden von Steckkontakten bei elektrischen Steckverbindern zu schaffen. Zur Lösung dieser Aufgabe wird das saure Bad gemäß der Erfindung derart zusammengesetzt, daß es als Leitsal?, Apfelsäure und als Komplexbildner Nitrilotriessigsäure enthältThe object of the present invention is to provide an electrolyte for high-quality gold-plating of plug contacts to create in electrical connectors. To solve this problem, the acidic bath is according to of the invention composed in such a way that it is used as electrolyte ?, malic acid and as complexing agent nitrilotriacetic acid contains Vorzugsweise soll dabei das Molverhältnis Kobalt zu Nitrilotriessigsäure zwischen 1 :2 und 1 :4 und der pH-Wert zwischen 3,8 und 4,7 liegen.The molar ratio of cobalt to nitrilotriacetic acid should preferably be between 1: 2 and 1: 4 and the pH between 3.8 and 4.7. Durch diese Maßnahme erhält man ein Goldbad, das eine hohe Kontaktqualität hinsichtlich Durchgangswiderstand und Abriebfestigkeit bei Steckkontakten garantiertThis measure produces a gold bath that has a high contact quality in terms of volume resistance and abrasion resistance guaranteed for plug contacts Das abgeschiedene Gold enthält etwa 03% KobaltThe deposited gold contains approximately 03% cobalt Um die Bildung des schwerlöslichen Kobaltzyanidkomplexes beim Ansatz des Bades zu verhindern, und die Entstehung von Kobalt(IlI)-Zyanid beim Betrieb des Bades zu vermindern, wird Nitrilotriessigsäure zugegeben. Diese verhindert auch die Abhängigkeit der Niederschlagszusammensetzung vom pH-Wert.To prevent the formation of the poorly soluble cobalt cyanide complex when the bath is made, and To reduce the formation of cobalt (III) cyanide when the bath is operating, nitrilotriacetic acid is added. This also prevents the dependency of the precipitation composition on the pH value. Das Bad kann sowohl in der Schwimmergalvanik als auch in einer Jet-Plating-Anlage verwendet werden.The bath can be used in float electroplating as well as in a jet plating system. Ein in der Schwimmergalvanik eingesetztes Bad arbeitet bei 30—35°C mit einer Stromausbeute von ca. 30% bei 1 A/dm2 und 25% bei 3 A/dm2. Der Kobaltgehalt beträgt dabei 0,2 g/l, der Goldgehalt 8-10 g/l. Das Molverhältnis Kobalt zu Nitrilotriessigsäure ist 1 :4,der pH-Wert liegt zwischen 3,8 und 4,2.A bath used in float electroplating works at 30-35 ° C with a current yield of approx. 30% at 1 A / dm 2 and 25% at 3 A / dm 2 . The cobalt content is 0.2 g / l, the gold content 8-10 g / l. The molar ratio of cobalt to nitrilotriacetic acid is 1: 4 and the pH is between 3.8 and 4.2. Zum Vergolden in einer Jet-Plating-Anlage wird der pH-Wert dieses Bades auf 4,4 bis 4,7 festgelegt Der Kobaltgehalt liegt bei 0,5 g/l bei einem Molverhältnis Kobalt zu Nitrilotriessigsäure von 1 :2. Der Goldgehalt beträgt 15 g/l. Mit einer entsprechenden Jet-Plating-Düse können Goldschichten bei Stromdichten bis 15 A/dm2 abgeschieden werden, wobei die Abscheiderate 3 μίτι Gold/min beträgtFor gilding in a jet-plating system, the pH of this bath is set at 4.4 to 4.7. The cobalt content is 0.5 g / l with a molar ratio of cobalt to nitrilotriacetic acid of 1: 2. The gold content is 15 g / l. With a corresponding jet-plating nozzle, gold layers can be deposited at current densities of up to 15 A / dm 2 , the deposition rate being 3 μm gold / min
DE19813121509 1981-05-29 1981-05-29 Bath for galvanic hard gold plating Expired DE3121509C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19813121509 DE3121509C2 (en) 1981-05-29 1981-05-29 Bath for galvanic hard gold plating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813121509 DE3121509C2 (en) 1981-05-29 1981-05-29 Bath for galvanic hard gold plating

Publications (2)

Publication Number Publication Date
DE3121509A1 DE3121509A1 (en) 1982-12-30
DE3121509C2 true DE3121509C2 (en) 1983-04-14

Family

ID=6133549

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813121509 Expired DE3121509C2 (en) 1981-05-29 1981-05-29 Bath for galvanic hard gold plating

Country Status (1)

Country Link
DE (1) DE3121509C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9216717U1 (en) * 1992-12-08 1993-02-11 W.C. Heraeus Gmbh, 6450 Hanau, De

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0168705B1 (en) * 1984-07-05 1988-10-19 Siemens Aktiengesellschaft Bath and process for electroplating hard gold

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1442325A (en) * 1972-07-26 1976-07-14 Oxy Metal Finishing Corp Electroplating with gold and gold alloys

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9216717U1 (en) * 1992-12-08 1993-02-11 W.C. Heraeus Gmbh, 6450 Hanau, De

Also Published As

Publication number Publication date
DE3121509A1 (en) 1982-12-30

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee