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:
Apr. 25, 1989
Filed:
Dec. 28, 1987
Applicant:
Inventor:
Alexander J Yerman, Scotia, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B23P / ;
U.S. Cl.
CPC ...
428209 ; 428220 ; 428335 ; 4285395 ; 428689 ; 428901 ; 4284735 ; 428458 ; 428336 ; 428216 ; 428450 ; 174 522 ; 361400 ; 156628 ; 156644 ; 427 96 ;
Abstract
An impermeable encapsulation system for integrated circuit chips utilizes a polyimide-siloxane block copolymer as an undercoat applied to the chip surface and an impermeable outer coat comprised either of a non-reactive metal, such as titanium, tantalum or aluminum, or an amorphous semiconductor material comprising silicon-boron. All of these materials may be effectively applied at temperatures sufficiently low to avoid damaging the chip.