The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1991
Filed:
May. 25, 1989
Applicant:
Inventors:
Assignee:
Tomoegawa Paper Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428 40 ; 428337 ; 428339 ; 428352 ; 156247 ;
Abstract
An adhesive tape for die bonding is disclosed, comprising a release film having a release layer on at least one side of a support and an adhesive layer attached to said release layer, wherein the exposed surface of said adhesive layer is a mirror-like surface having an average roughness on center line (Ra) of not more than 2.5 .mu.m and a maximal height (Rmax) of not more than 20 .mu.m.