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Browse Prior Art Database

Electroless Gold Plating

IP.com Disclosure Number: IPCOM000073538D
Original Publication Date: 1970-Dec-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Haddad, MM: AUTHOR [+3]

Abstract

The following examples of electroless gold plating solutions are characterized by rapid production of quality deposits, stability and controllability. Best results are obtained when the substrate to be plated is presensitized with a very thin layer of a catalytic metal such as palladium, rhodium or platinum. The bath optimally is an aqueous alkaline solution (pH greater than 7; adjusted by added NH(4)OH, NaOH or KOH) operated at a temperature between 75-90 degrees C. Agitation of the object being plated or the bath will enhance the plating. Example I HAuCl(4).3H(2)O: 0.0075 - 0.025 moles/liter(Au/+++/only) Na(3)C(6)H(5)O(7).2H(2)O 0.04 - 1.60 moles/liter HCHO: 0.61 - 1.23 moles/liter (CH(3))(2)H=BH(3): 0.05 - 0.17 moles/liter Example II HAuCl(4).3H(2): 0.0075 - 0.025 moles/liter(Au/+++/only) Na(2)C(4)H(4)O(6): 0.04 - 1.

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Electroless Gold Plating

The following examples of electroless gold plating solutions are characterized by rapid production of quality deposits, stability and controllability. Best results are obtained when the substrate to be plated is presensitized with a very thin layer of a catalytic metal such as palladium, rhodium or platinum. The bath optimally is an aqueous alkaline solution (pH greater than 7; adjusted by added NH(4)OH, NaOH or KOH) operated at a temperature between 75-90 degrees C. Agitation of the object being plated or the bath will enhance the plating. Example I HAuCl(4).3H(2)O: 0.0075 - 0.025 moles/liter(Au/+++/only) Na(3)C(6)H(5)O(7).2H(2)O 0.04 - 1.60 moles/liter HCHO: 0.61 - 1.23 moles/liter (CH(3))(2)H=BH(3): 0.05 - 0.17 moles/liter Example II HAuCl(4).3H(2): 0.0075 - 0.025 moles/liter(Au/+++/only) Na(2)C(4)H(4)O(6): 0.04 - 1.60 " " HCHO: 0.61 - 1.23 " " (CH(3))(2)NH=BH(3): 0.05 - 0.17 " " Example III HauCl(4).3H(2)O: 0.0075 - 0.025 moles/liter(Au/+++/only) Na(2)SO(3): 0.04 - 1.60 " " HCHO: 0.61 - 1.23 " " (CH(3))(2)NH=BH(3): 0.05 - 0.17 " " Example IV AuNa(CN)(2): 0.0075 - 0 050 moles/liter(Au/+/ only) Na(3)C(6)H(5)O(7).2H(2)O: 0.04 - 1.60 " " (NH(4))3C(6)H(5)O(7).2H(2)O 0.05 - 2.00 " " HCHO: 0.70 - 1.25 " " (CH(3))(2)NH=BH(3): 0.05 - 0.20 " "

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