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:
Oct. 26, 1999
Filed:
Jun. 07, 1996
Applicant:
Inventors:
Steven John Holmes, Milton, VT (US);
Harold George Linde, Richmond, VT (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
156155 ; 2940701 ; 29424 ; 156 74 ; 1563315 ; 525419 ;
Abstract
Disclosed is the use of a removable passivating layer in multichip packaging and CUBE applications. The process takes advantage of the fact that various metal ions will react with the carboxylic acid groups of various polyimide precursors. The polyimide will cure at a first temperature and the system may be manipulated and tested. At a later point, the polyimide is subjected to a second, higher temperature in order to decompose or completely destroy the polyimide.