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:
Mar. 31, 1992
Filed:
Dec. 04, 1989
Applicant:
Inventor:
Noriaki Onodera, Sendai, JP;
Assignees:
Ricoh Company, Ltd., Tokyo, JP;
Ricoh Research Institute of General Electronics Co., Ltd., Natori, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 19 ; 357 55 ; 372 50 ;
Abstract
A photo-functional device has a semiconductor substrate, a light emitting section laminated on one surface of the semiconductor substrate and formed into a semiconductor laminate, a light receiving section laminated on the one surface of the semiconductor substrate, formed into a semiconductor laminate and electrically connected in series to the light emitting section, and a coupling rate conversion section disposed between the light emitting section and the light receiving section for converting a coupling rate of light coupled from the light emitting section to the light receiving section.