Stock material or miscellaneous articles – Structurally defined web or sheet – Weight per unit area specified
Patent
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.
Hatanaka Hideo
Kojima Tamao
Nakatani Seiichi
Okano Masayuki
Sakai Masayuki
Lam Cathy
Matsushita Electric - Industrial Co., Ltd.
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