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. 21, 1995
Filed:
Aug. 15, 1994
Applicant:
Inventors:
Norio Moriyama, Toukai, JP;
Noboru Sugiura, Mito, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
123617 ; 361707 ;
Abstract
In order to mount a power transistor chip, a multilayered member formed by fixing a molybdenum plate to a copper base is flattened by eliminating its deformation in the member caused by heated fixing through elastic working, it is possible to prevent cracking in a power transistor chip or a solder layer caused by the deformation. Especially, it is possible to improve the reliability of an electronic distributing type ignition device mounted on an engine block formed in a unit of an ignition controller and an ignition coil.