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. 15, 1988
Filed:
Dec. 31, 1986
Theodorus G Van Oirschot, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A method of making a semiconductor device for producing or amplifying electromagnetic radiation, more particularly a semiconductor laser, has a substrate which has a mesashaped raised portion. On either side of the mesa there is located a blocking layer of a conductivity type opposite to that of the substrate. On the blocking layer are formed a first passive layer of the same conductivity type as the substrate, an active layer and a second passive layer of a conductivity type opposite to that of the substrate. According to the invention, the blocking layer also extends over the mesa, which is connected by diffusion from at least the first passive layer to the blocking layer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile