Thermally stable dual metal coated laminate products made from t

Details Thermally stable dual metal coated laminate products made from t Thermally stable dual metal coated laminate products made from t

1988-02-16

1989-09-19

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428675, 428680, B32B 1504

Patent

active

048680710

ABSTRACT:
Both surfaces of a uniformly and completely textured polyimide sheet are coated with a layer of electroless nickel or cobalt and a subsequent layer of electrolytically applied copper yielding an adhesiveless laminate useful in the production of electronic circuitry. The copper and nickel or cobalt layers are strongly bonded to the textured polyimide sheet to the extent that the laminate exceeds bond strength requirements as measured by current standard peel strength tests of the Institute for Interconnecting and Packaging Electronic Circuits (IPC) for both initial and post solder float adhesion, as well as a modification of IPC test 2.4.9 method E for resistance to thermal cycling.

REFERENCES:
patent: 3691007 (1972-09-01), Pavlou
patent: 4019877 (1977-04-01), Gass et al.
patent: 4394419 (1983-07-01), Konicek
patent: 4503112 (1985-03-01), Konicek
patent: 4725504 (1988-02-01), Knudsen et al.

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