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. 05, 1986
Filed:
Aug. 26, 1985
Applicant:
Inventors:
Yen-Ching Huang, Ohiso, JP;
Hideyasu Nikaido, Oume, JP;
Assignees:
Tokai University, Tokyo, JP;
Sumitomo Metal Mining Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427 37 ; 427 38 ; 427 91 ; 427 99 ; 427282 ; 427287 ;
Abstract
A lead frame with an Al coating which enjoys satisfactory tightness of adhesion and sufficiently low hardness is manufactured by a method, comprising the steps of covering the lead frame with a mask sheet possessing an opening for exposing an inner lead part of the lead frame, keeping the lead frame at a temperature in the range of 100.degree. to 240.degree. C. under a high degree of vacuum exceeding the level of 10.sup.-5 Torr, and depositing aluminum on the inner lead part by arc-discharge type ion plating.