Compositions – Electrically conductive or emissive compositions – Free metal containing
Patent
1988-08-23
1991-03-12
Barr, Josephine
Compositions
Electrically conductive or emissive compositions
Free metal containing
252513, 252514, 252518, 523457, 428901, H01B 106
Patent
active
049991361
ABSTRACT:
A UV curable electrically conductive adhesive has been developed with low resistivity, adequate lap shear strength, good thermal stability, and very stable conductivity at high temperatures of about 100.degree. C. and high humidity. The adhesive may be applied by silk screen printing and cured by UV in about 8 seconds. The adhesive may also be used as a replacement of solder in automated surface mount technology for electronic circuit fabrication. The adhesive is a mixture of (A) a blend of an acrylate epoxy and a urethane, a copolymer of an acrylate epoxy and a urethane, or mixtures thereof; (B) a polyfunctional acrylate monomer; (C) a photoinitiator, and (D) a conductive filler. Optionally, adhesion promoters and flow control agents may be used.
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Barrett Anthony P.
Scala Luciano C.
Schoch, Jr. Karl F.
Su Wei-Fang A.
Barr Josephine
Mich, Jr. A.
Westinghouse Electric Corp.
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