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:
Jan. 04, 1977
Filed:
Jan. 26, 1976
Applicant:
Inventors:
Tadahiko Miyoshi, Hitachi, JA;
Yasutoshi Kurihara, Katsuta, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 19 ; 357 17 ; 357 55 ; 357 68 ;
Abstract
A photo coupler comprises a multilayer insulating substrate having a cavity on a predetermined portion and a first conductive layer at the bottom of the cavity and a second conductive layer on one surface of the insulating substrate. A light emitting diode is disposed in the cavity with a substantial light emitting zone thereof being in the cavity and is electrically connected to the first conductive layer. A photo responsive device is placed above the cavity on the substrate with the photo sensitive surface of the device facing the light emitting diode and being electrically connected to the second conductive layer.