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:
May. 26, 1981
Filed:
Dec. 13, 1979
Applicant:
Inventors:
Earl S Schlegel, Plum Borough, PA (US);
Maurice H Hanes, Murrysville, PA (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 19 ; 357 30 ; 357 17 ; 357 18 ; 307311 ; 307260 ; 331 / ;
Abstract
A photo-transistor includes a multi-apertured collector electrode disposed on a semiconductor collector layer. A laser diode and a light pipe are provided for each aperture such that the light from the laser is transmitted to its associated aperture via the light pipe. Means are included for sequentially pulsing each laser so as to cause a high-frequency intermittent current in the photo-transistor piece of molybdenum 88 which provides improved current flow and heat sinking for the transistor 10.