MANUFACTURING METHOD OF MULTILAYER FLEXIBLE CIRCUIT STRUCTURE
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United States of America Patent
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Mar 10, 2016
app pub date -
Sep 5, 2014
filing date -
Sep 5, 2014
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Abstract
A manufacturing method of multilayer flexible circuit structure including the following steps is provided. Two first flexible substrates are correspondingly bonded on two sides of a release film, and two conductive materials are correspondingly formed on the two first flexible substrates. The two conductive materials are patterned to form two first inner-layer circuits. Two outer build-up structures are bonded on the two corresponding first flexible substrates. The release film is removed, so as to separate the two first flexible substrates. An outer-layer circuit is formed on each of the first flexible substrates and the corresponding outer build-up structure, wherein the outer-layer circuit is connected to the corresponding first inner-layer circuit, and each of the first flexible substrates, the corresponding first inner-layer circuit, the outer build-up structure and the outer-layer circuit correspondingly form a multilayer flexible circuit structure. Another manufacturing method of multilayer flexible circuit structure is also provided.
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