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:
Mar. 21, 1989
Filed:
Jun. 02, 1987
Applicant:
Inventors:
Takao Kuroda, Koganei, JP;
Akiyoshi Watanabe, Koganei, JP;
Takao Miyazaki, Hachioji, JP;
Hiroyoshi Matsumura, Saitama, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 22 ; 357 60 ; 357 88 ; 357 16 ;
Abstract
A semiconductor device in which two sorts of compound semiconductors having unequal lattice constants are joined, is disclosed. Defects such as dislocations attributed to lattice mismatching are avoided by subjecting one of the compound semiconductors to atomic layer doping with an impurity. Owing to this construction, it is permitted to combine the optimum materials as the compound semiconductors, and the semiconductor device has its performance improved and its design versatility expanded.