Method of preparing film adhesive thermal foil

Details Method of preparing film adhesive thermal foil Method of preparing film adhesive thermal foil

1992-07-30

1994-08-30

Rosenbaum, Mark

Metal working

Method of mechanical manufacture

Assembling or joining

295271, 295273, 2989003, 156171, 156173, B21D 3500

Patent

active

053415558

ABSTRACT:
A thermal foil material is made of a layer of B-staged curable epoxy film adhesive and a plurality of substantially parallel insulated copper wires embedded in the epoxy layer. The copper wires are arranged in a side-by-side fashion in at least one layer within the epoxy. Such a thermal foil material is prepared by furnishing a first sheet of a B-staged film adhesive material, preferably wrapped over a mandrel, and placing a layer of metallic elements onto the first sheet with the metallic elements arranged in a side-by-side fashion. A second sheet of a B-staged film adhesive material is placed over the layer of metallic elements and the first sheet. The stack is heated and pressure is applied perpendicular to the first and second sheets to cause the B-staged film adhesive mate rial to flow into the interstices between the metallic elements. This material may be used immediately or stored to prevent further curing of the epoxy until it is used.

REFERENCES:
patent: 1697142 (1929-01-01), Roller
patent: 2389733 (1945-11-01), Lee
patent: 2870277 (1959-01-01), Carter
patent: 3502527 (1970-03-01), Borden
patent: 3660199 (1972-05-01), Riccitiello et al.
patent: 4180608 (1979-12-01), Del
patent: 4384401 (1983-05-01), Borrup
patent: 4783365 (1988-11-01), Skalarski et al.
patent: 5100490 (1992-03-01), Holroyd et al.

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