Uses of uniaxially electrically conductive articles

Details Uses of uniaxially electrically conductive articles Uses of uniaxially electrically conductive articles

H - Electricity

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H01L 23/50 (2006.01) B23K 1/00 (2006.01) B23K 20/02 (2006.01) B23K 31/02 (2006.01) H01L 21/48 (2006.01) H01L 23/14 (2006.01) H01L 23/373 (2006.01) H01L 23/492 (2006.01) H01L 23/498 (2006.01) H05K 1/03 (2006.01) H05K 3/00 (2006.01)

Patent

CA 1321659

590179 RK361COM ABSTRACT USES OF ANISOTROPICALLY ELECTRICALLY CONDUCTIVE ARTICLES Polymer (preferably polyimide) sheets with laser ablated through-holes plated with metal are used for making electrical connections to specified microcircuits, espe- cially unbumped microchips and Tape Automated Bonding (TAB) articles. Bonding with different melting-point materials at opposite ends of the plated holes is disclosed. Preferred polyimides are those derived from polymerisation of 4,4'-biphenyldianhydride and (4,4'-diaminobiphenyl, or 4,4'-diaminobiphenylether, or phenylenediamine, preferably p-phenylenediamine).

590179

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