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:
May. 10, 1994
Filed:
Oct. 30, 1991
Applicant:
Inventors:
Assignee:
SGS-Thomson Microelectronics S.r.l., Agrate Brianza, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
365185 ; 365182 ; 365900 ;
Abstract
The probability of soft-programming of the reference cells of a FLASH-EPROM memory may be excluded by having a decoupling transistor of a type of conductivity opposite to that of the cells functionally connected between the gate of each reference cell and the respective row line. Moreover the elimination of the electrical stresses to which the reference cells are subjected during the repeated programming cycles of the memory cells, increases the stability of the respective reference values of threshold and current level provided by the reference cells, thus increasing the reliability of the device.