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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.:

US 5091756 B1

PDFFull Text
Date of Patent:
Feb. 25, 1992

Filed:

Mar. 19, 1990

Superlattice structure

Applicant:
Inventors:

Kenichi Iga, Tokyo, JP;

Fumio Koyama, Tokyo, JP;

Hiroyuki Uenohara, Tokyo, JP;

Assignee:

Tokyo Institute of Technology, Tokyo, JP;

Attorney:

Spencer & Frank

Primary Examiner:

Andrew J James

Assistant Examiner:

Ngan Van Ngo

Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357-4 ; 357 16 ; 357 17 ; 372 45 ;
Abstract

A superlattice structure composed of at least two kinds of crystal layers, such as semiconductor layers, being different in bandgap, being combined alternately with each others, and the physical parameters of the layers being designed so that phase differences of reflected waves of injected electrons or holes are substantially equal to .pi. multiplied by an odd numbered integer so that the energy potential barrier height is effectively increased. When used in semiconductor lasers, it allows the confining efficiency of injected carriers to be noticeably improved.

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Iga, Kenichi. (1992). Superlattice structure (U.S. Patent No. 5091756). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5091756

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