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:
Apr. 10, 1990
Filed:
Sep. 13, 1989
Applicant:
Inventor:
Seiichi Oshima, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 30 ; 357 71 ; 357 38 ; 357 53 ;
Abstract
A multilayer substrate (18) has two ceramic plates (111, 114) and a shielding metal layer (113) provided between the ceramic plates. An electronic circuit having a TRIAC (7) and a photocoupler (5) is provided on the multilayer substrate. The shielding metal layer and a second main electrode (T.sub.2) of the TRIAC are connected with each other by solder filled in a through hole 116. External noise is captured by the shielding metal layer, to be propagated to the second main electrode.