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:
Aug. 01, 1989
Filed:
Apr. 08, 1987
Applicant:
Inventors:
Assignee:
Etat Francais, Issy Les Moulineaux, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
156605 ; 156607 ; 1566161 ; 1566162 ; 1566171 ; 1566262 ; 156D / ; 156D / ; 156D / ; 156D / ; 437115 ;
Abstract
The present invention relates to a process for the preparation of mono-crystalline 3-5 semi-insulating materails by doping, characterized in that the starting charge of type .rho. is doped with at least one deep donor due to a transition element. It relates also to the use of the semi-insulating materials obtained in the fields of optoelectronics and of rapid electronics.