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. 30, 1989
Filed:
Feb. 03, 1988
Manfred Plihal, Munich, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A monolithically integrated waveguide-photodiode combination for optical communications systems includes a carrier substrate of n-conductive semiconductor material, a further layer of the same material in whose surface is formed a strip-shaped n-conductive absorption layer, and of a waveguide formed thereon. A p-doping is diffused into the waveguide through the n-conductive absorption layer and a photodiode is thereby formed. A contact for the positive electrode of the photodiode is applied over the p-conductive region and the contact for the negative electrode is applied to the free side of the carrier substrate. The waveguide is covered by a cover layer along its top surface.