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Browse Prior Art Database

Gold Plating Solution

IP.com Disclosure Number: IPCOM000087784D
Original Publication Date: 1977-Mar-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Duke, PJ: AUTHOR [+3]

Abstract

An improved gold plating solution or strike for use on permalloy and other metals has the following composition: n-perfluoroctyl sulfonate 100 mg/1 citric acid (120 g/1) to pH 3.7 to 3.8 phosphate-citrate type plating 500 ml/1 bath containing 1 troy oz. gold/gallon (such as Pura Gold 125 of Sel Rex)

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Gold Plating Solution

An improved gold plating solution or strike for use on permalloy and other metals has the following composition: n-perfluoroctyl sulfonate 100 mg/1 citric acid (120 g/1) to pH 3.7 to 3.8 phosphate-citrate type plating 500 ml/1 bath containing 1 troy oz. gold/gallon (such as Pura Gold 125 of Sel Rex)

The use of the wetting agent n-perfluoroctyl sulfonate in the gold strike results in a uniform coating of gold without streaking, as well as consistent adhesion of the gold to the metal. Although a concentration of 14 mg/1 of n- perfluoroctyl sulfonate produces a surface tension minimum, a higher concentration such as 100 mg/1 is preferred to avoid gold streaking.

The use of this strike makes possible good adherent plating on thin permalloy films (200Angstroms) which are easily damaged by chemical cleaning methods. Plating with this strike may also be done on permalloy which is too aged to be successfully gold plated by other methods.

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