CIRCUIT BOARD AND METHOD FOR MAKING THE SAME
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United States of America Patent
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Issued Date -
Mar 16, 2017
app pub date -
Oct 22, 2015
filing date -
Sep 16, 2015
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Abstract
A circuit board includes at least two substrates and an adhesive film sandwiched between the two substrates. Each substrate includes a base board. The base board includes conductive wires. Each base board is connected to the other base board by the adhesive film. The adhesive film includes two first adhesive layers and a second adhesive layer. The second adhesive layer is sandwiched between the two first adhesive layers. An adhesion force of the first adhesive layer is greater than an adhesion force of the second adhesive layer. A major composition of the second adhesive layer is rubber. The rubber is selected from a group consisting of isoprene rubber, styrene butadiene rubber, ethylene propylene rubber, butyl rubber, acrylic rubber, and polybutadiene rubber, and mixtures thereof.
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