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:
Nov. 11, 1980
Filed:
Jun. 28, 1979
Frank Z Hawrylo, Trenton, NJ (US);
Henry Kressel, Elizabeth, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
In making a laser diode by a method which includes epitaxially depositing a plurality of layers of a semiconductor material on a substrate, the final outermost layer deposited is of a material which has a band-gap lower than the preceding adjacent layer, which readily accepts a conductivity modifier, which can be selectively etched from the preceding adjacent layer and which preferably has a lattice parameter substantially equal to that of the preceding adjacent layer. A conductivity modifier is then diffused along a narrow stripe into and through the outermost layer, into the preceding adjacent layer. The outermost layer is then etched away to expose the surface of the preceding adjacent layer and a metal contact is applied to the exposed surface.