Preparation of electroless nickel coating having improved properties
AssigneeGeneral Electric Company
InventorsHerbert Shin-I Chao, Bradley R. Karas, Donald F. Foust
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Abstract
Increases in surface resistivity of electroless nickel coatings on polycarbonate-containing substrates are inhibited by employing two electroless nickel plating solutions. The first solution is one which deposits a metal layer containing phosphorus, if any, in an amount up to 5% by weight and is used to deposit a layer at least 0.5 micron thick. The second solution is one which deposits a layer containing phosphorus in the amount of at least 5% and preferably at least 6% by weight. Another metal layer may be interposed between the two nickel layers.
Claims12
A method for producing a nickel coating on a resinous article comprising aromatic polycarbonate which comprises initially depositing a first electroless nickel coating which is phosphorus-free or has a phosphorus content up to 5% by weight to a total thickness of at least about 0.5 micron, and subsequently depositing a second electroless nickel coating containing phosphorus in an amount greater than that of said first coating and at least 5% by weight.
Dependencies are inferred from the claim text.