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:
Jul. 14, 1987
Filed:
Oct. 07, 1985
Applicant:
Inventors:
Tsiu C Chan, Carrollton, TX (US);
Yu-Pin Han, Dallas, TX (US);
Assignee:
Thomson Components-Mostek Corp., Carrollton, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01C / ;
U.S. Cl.
CPC ...
29571 ; 2957 / ; 2957 / ; 2957 / ; 2957 / ; 29580 ; 357 236 ; 156643 ; 148188 ;
Abstract
A method of making a trench capacitor employs an N-type switchable plate formed in a P-type substrate for holding charge at either zero volts or a positive TC voltage and a P-type ground plate that fills in a trench around a memory cell, so that P-type dopant diffuses through a thin oxide insulator to form a channel stop and a pinhold short through the oxide is self-healing by the formation of a reverse-biased P-N diode that cuts off the flow of current through the pinhole.