Nonwoven fabric cloth substrate for printed wiring boards, and p

Details Nonwoven fabric cloth substrate for printed wiring boards, and p Nonwoven fabric cloth substrate for printed wiring boards, and p

1998-10-26

2000-04-04

Lam, Cathy

Stock material or miscellaneous articles

Structurally defined web or sheet

Weight per unit area specified

1621573, 442169, 442351, D21H 1302

Patent

active

060458976

ABSTRACT:
A nonwoven fabric cloth substrate for printed wiring boards containing aromatic polyamide fibers and having a 0.7-1.0 dynamic elastic modulus ratio (E' (250.degree. C.)/E' (30.degree. C.)) and a 0.05 or less loss tangent (Tan .delta.) peak value at 30-250.degree. C., and a prepreg and a printed wiring board using the nonwoven fabric cloth substrate.

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Communication from the European Patent Office and attached Search Report, 1997.

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