Uses of uniaxially electrically conductive articles

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

1995-01-03

1997-05-20

Thomas, Laura

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

114261, 114262, 2281801, 22818021, 439 66, H05K 100

Patent

active

056314477

ABSTRACT:
Polymer (preferably polyimide) sheets (10) with laser ablated through-holes plated with metal (20) are used for making electrical conections to specified microcircuits, especially 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 phylenediamine, preferably p-phenylenediamine).

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