Adhesive tape for electronic parts

Stock material or miscellaneous articles – Layer or component removable to expose adhesive – Polymer derived from material having at least one acrylic or...

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428 419, 428212, 428349, 428352, 428355CN, 428355N, 428447, 4284735, 528 26, B32B 712, C09J 702, C09J17908, H01L 2329

Patent

active

060458860

ABSTRACT:
This invention provide an adhesive tape and a liquid adhesive for electronic parts having sufficient thermal resistance and reliability. The adhesive tape comprises adhesive layers composed of at least a polyimide comprising the repeating units represented by the formulas (1) and (2) on both sides of the substrate, one of said adhesive layer having a higher glass transition temperature than that of the other adhesive layer: ##STR1## wherein X is --SO.sub.2 -- and/or --C(.dbd.O)--OCH.sub.2 CH.sub.2 O--C(.dbd.O)--,

REFERENCES:
patent: 5851616 (1998-12-01), Oka et al.
patent: 5866250 (1999-02-01), Oka et al.
patent: 5891540 (1999-04-01), Oka

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