Metal working – Method of mechanical manufacture – Electrical device making
Patent
1997-12-01
1999-12-21
Young, Lee
Metal working
Method of mechanical manufacture
Electrical device making
205125, 427 97, H05K 310
Patent
active
060032251
ABSTRACT:
A printed wiring board has an aluminum backing, a dielectric layer overlying the aluminum backing, and a copper layer overlying the dielectric layer. Holes are drilled through the copper and the dielectric layers, and either partially or fully through the aluminum backing, and plated to provide a conductive path between the copper layer and the aluminum backing. Tin-lead traces are applied to the upper surface of the copper layer and the copper layer is etched to define conductive paths. The copper exposed and aluminum exposed surfaces are protected so as to permit processing of the printed wiring board in otherwise-incompatible etchants and other solutions.
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patent: 5462892 (1995-10-01), Gabriel
Caputo Davide
Grunebach Georgann S.
Gudmestad Terje
Hughes Electronics Corporation
Sales Michael W.
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