Composite film and lead frame with composite film attached

Details Composite film and lead frame with composite film attached Composite film and lead frame with composite film attached

1997-04-18

1999-12-07

Jones, Deborah

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428343, 428339, B32B 712

Patent

active

059980206

ABSTRACT:
A composite film, comprising a base film and an adhesive layer on one or both sides of the base film, the composite film having a thickness of T (.mu.m), the base film having an edge tearing strength of R (kg/20mm), the adhesive layer having a total thickness of A, the base film having a thickness of B, T being related to R by a numerical formula R>0.6T-8 when T.ltoreq.60, or by a numerical formula R.gtoreq.28 when T>60, and A/B being 0.5 to 1.4.

REFERENCES:
patent: 5032438 (1991-07-01), Sakumoto et al.
patent: 5091251 (1992-02-01), Sakumoto et al.
patent: 5593774 (1997-01-01), Hiroe et al.

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