Ultraviolet curable conductive resin
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United States of America Patent
Stats
-
Mar 12, 1991
Grant Date -
N/A
app pub date -
Aug 23, 1988
filing date -
Aug 23, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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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