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:
Aug. 12, 1986
Filed:
Apr. 19, 1985
Applicant:
Inventors:
Kazunao Kudoh, Itami, JP;
Yoshikazu Hashimoto, Itami, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; H01I / ;
U.S. Cl.
CPC ...
428622 ; 428630 ; 428653 ;
Abstract
The present invention relates to an improvement of a packaging material for use in integrated circuits (IC) such as IC, LSI and VLSI, and in particular to an improvement of a lead frame made of iron-nickel alloys used as a material in a low-melting-point glass-ceramic package. The invention resides in provision of a lead frame faces made of an iron-nickel alloy substrate containing nickel therein at a ratio of 42 to 49% by weight and the improvement wherein an aluminium layer of 0.2 to 10 microns thick is coated on both faces and sides of the substrate.