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:
Sep. 08, 1992
Filed:
Oct. 25, 1991
Applicant:
Inventors:
Steven R Collins, Lexington, MA (US);
Robert B Johnson, Marlborough, MA (US);
Assignee:
Raytheon Company, Lexington, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 13 ; 357 63 ; 357 67 ;
Abstract
A precision voltage reference device having a forward biased and reverse biased silicon junctions arranged as a concentric circular annular monolithic structure is described. Selective hardening of the forward biased junction is provided to adjust carrier lifetime in said junction thereby providing a radiation hardened device. The selective hardening is provided by implanting non-dopant species to induce a predetermined amount of lattice damage at the forward biased junction. This arrangement permits both the forward biased junction and the reverse biased junction to be fabricated on a common substrate.