Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Adhesive outermost layer
Patent
1996-08-28
1998-03-10
Ryan, Patrick
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Adhesive outermost layer
428343, 428344, 428447, 428458, 4284735, B32B 712, B32B 904, B32B 1508, B32B 2700
Patent
active
057259488
ABSTRACT:
This invention provides an adhesive tape and a liquid adhesive for electronic parts having sufficient thermal resistance and reliability. The adhesive tape of the invention comprises an adhesive layer composed of at least a polyimide selected from (I) a polyimide comprising the repeating unit represented by the following formula (1), (II) a polyimide comprising the repeating unit represented by the following formula (2), and (III) a polyimide comprising the repeating units represented by the following formulas (1) and (2) in a suitable proportion, provided on at least one surface of a heat resistance film or on a surface of a release film: ##STR1## wherein Ar is a divalent group having aromatic rings, Ra is a divalent group having 2 to 6 benzene rings; Rb is an alkylene group having 2 to 20 carbon atoms, a specific ether group or a specific dimethylsiloxane group: X.sup.1 is NH, NR (R is a C.sub.1 -C.sub.4 alkyl group or alkoxy group) or S; and X.sup.2 is NH, NR (R is a C.sub.1 -C.sub.4 alkyl group or alkoxy group), ##STR2## or S.
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Nishigaya Takeshi
Oka Osamu
Lam Cathy F.
Ryan Patrick
Tomoegawa Paper Co. Ltd.
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