Radiation attenuation shielding
First Claim
1. An electronic base material having an electromagnetic radiation attenuating coating, said base material having a dielectric surface coated with an electroless alloy metal coating wherea. a first electroless alloy metal coating in contact with the surface of the base material is an alloy of copper, a member selected from the group consisting of cobalt, nickel and mixtures of cobalt and nickel, and phosphorus with a predominant proportion of the metal copper, andb. a second electroless alloy metal coating furthest remote from the surface of the base material is an alloy of copper, a member selected from the group consisting of cobalt, nickel and mixtures of cobalt and nickel and phosphorus with a predominant proportion of the metal nickel, cobalt or a mixture of the two, said first and second electroless alloy coatings being in contact with each other.
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Accused Products
Abstract
An electromagnetic radiation attenuating coating comprising an electronic housing base material coating with a first electroless metal alloy of copper, a member from the group of nickel, cobalt and mixtures of nickel and cobalt, and phosphorus rich in copper and a second electroless metal alloy of copper, a member from the group of nickel, cobalt and mixtures of nickel land cobalt, and phosphorus rich in nickel. The coating provides superior radiation attenuation and comprises fewer processing steps in its formation.
66 Citations
12 Claims
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1. An electronic base material having an electromagnetic radiation attenuating coating, said base material having a dielectric surface coated with an electroless alloy metal coating where
a. a first electroless alloy metal coating in contact with the surface of the base material is an alloy of copper, a member selected from the group consisting of cobalt, nickel and mixtures of cobalt and nickel, and phosphorus with a predominant proportion of the metal copper, and b. a second electroless alloy metal coating furthest remote from the surface of the base material is an alloy of copper, a member selected from the group consisting of cobalt, nickel and mixtures of cobalt and nickel and phosphorus with a predominant proportion of the metal nickel, cobalt or a mixture of the two, said first and second electroless alloy coatings being in contact with each other.
Specification