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Metallizing Nonconductive Substrates

IP.com Disclosure Number: IPCOM000093742D
Original Publication Date: 1966-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Haines, RS: AUTHOR

Abstract

Prior to the deposition of metal on a nonconductive substrate by chemical reduction of the metal cations from baths containing hypophosphite anions the substrate is activated. Activation is normally brought about by treating the substrate with a suitable activating solution. One such solution is palladium dimethyl sulfoxide complex (PdCl(2). 2DMSO) in a suitable solvent such as dimethyl sulfoxide dichloromethane, nitromethane or nitrobenzene. Alternatively, this complex can be combined with polymeric binders or resins.

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Metallizing Nonconductive Substrates

Prior to the deposition of metal on a nonconductive substrate by chemical reduction of the metal cations from baths containing hypophosphite anions the substrate is activated. Activation is normally brought about by treating the substrate with a suitable activating solution. One such solution is palladium dimethyl sulfoxide complex (PdCl(2). 2DMSO) in a suitable solvent such as dimethyl sulfoxide dichloromethane, nitromethane or nitrobenzene. Alternatively, this complex can be combined with polymeric binders or resins.

The to-be-activated substrate is then immersed in or otherwise treated with a solution or binder containing the complex. The complex is subsequently decomposed with ultraviolet light which it absorbs strongly in the range of 3050 Angstroms, to produce an activated surface. Alternatively the palladium complex is decomposed with a reducing agent such as sodium hypophosphite or an aldehyde to produce an activated surface. The activated surface is subsequently plated with metal by chemical reduction.

In addition to palladium chloride dimethyl sulfoxide complexes of dimethyl sulfoxide with cobalt nickel platinum ruthenium osmium and rhodium salts can be made and used in a similar manner for activating nonconductive substrates.

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