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:
Oct. 21, 2008
Filed:
Aug. 13, 2003
Applicant:
Mitsuhiro Masuda, Chiyoda-ku, JP;
Inventor:
Mitsuhiro Masuda, Chiyoda-ku, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 23/495 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a transfer-mold configuration of an automotive electronic control unit, the thermal expansion coefficient of the circuit board is made apparently equal to that of the base member to suppress excessive stresses between them. The circuit board and the base member are placed in the center of the transfer-mold structure to make thermal stresses symmetrical and thus suppress strains.