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:
Jun. 28, 1994
Filed:
May. 14, 1992
Applicant:
Inventors:
Hitoshi Nakamura, Kanagawa, JP;
Shoichi Hanatani, Kodaira, JP;
Chiaki Notsu, Kokubunji, JP;
Tsukuru Ohtoshi, Kokubunji, JP;
Koji Ishida, Musashino, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Device Engineering Co., Ltd., Mobara, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257 17 ; 257 21 ; 257 22 ; 257186 ;
Abstract
A semiconductor device includes a region in which carriers are transferred in the lamination direction of a multiple quantum well, such as a multiple quantum well multiplication layer of a superlattice APD. A superlattice structure with a varying well width is introduced to a hetero-interface present in the transfer region, thereby preventing pile-up of the carriers.
Nakamura, Hitoshi. (1994). Semiconductor optical device having a heterointerface therein (U.S. Patent No. 5324959). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5324959
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile