US Patent 7148463 Increased responsivity photodetector

Patent 7148463 was granted and assigned to TriQuint Semiconductor on December, 2006 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

TriQuint Semiconductor

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7148463

Date of Patent

December 12, 2006

Patent Application Number

10621694

Date Filed

July 16, 2003

Patent Primary Examiner

‌

Stephone B. Allen

Patent abstract

A photodetector includes a high-indium-concentration (H-I-C) absorption layer having a Group III sublattice indium concentration greater than 53%. The H-I-C absorption layer improves responsivity without decreasing bandwidth. The photoconversion structure that includes the H-I-C absorption layer can be formed on any type of substrate through the use of a metamorphic buffer layer to provide a lattice constant gradient between the photoconversion structure and the substrate. The responsivity of the photodetector can be further improved by passing an incoming optical signal through the H-I-C absorption layer at least twice.