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:
Nov. 10, 1992
Filed:
Sep. 30, 1991
Applicant:
Inventors:
Masayuki Yamamoto, Fukuoka, JP;
Kazuyuki Hayashi, Fukuoka, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B23K / ;
U.S. Cl.
CPC ...
156285 ; 156497 ; 29840 ; 219 5622 ; 228220 ;
Abstract
Disclosed is a method for preventing the oxidation of a lead frame in a bonding system comprising the steps of introducing a first atmospheric gas toward a bonding portion of a lead frame along a surface of the lead frame and supplying a second atmospheric gas to shield the bonding portion from contact with ambient air simultaneously with the introduction of the first atmospheric gas.