Electromagnetic wave shielding composition comprising epoxy resin and copper particles
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United States of America Patent
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Nov 19, 1991
Issued Date -
N/A
app pub date -
Jun 21, 1990
filing date -
Feb 21, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electromagnetic wave shielding circuit and the production method thereof is described, wherein the circuit comprises a base board, an electric circuit formed on the base board, an electrically isolating coating coated over the electric circuit, a layer of coating having copper particles contained therein coated over the electrically isolating coating and hardened by heating, a copper plating layer attached to the surface of the copper particle containing coating for discharging out of the electric circuit an electromagnetic wave current which may be produced in the electric circuit, said copper particle containing coating having contained therein 100% by weight of copper particles and 12%-25% by weight of epoxy resin for a binder.
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