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:
Jan. 23, 1996
Filed:
Oct. 19, 1993
Applicant:
Inventors:
Giancarlo Ginami, Bergamo, IT;
Enrico Laurin, Monza, IT;
Silvia Lucherini, Milan, IT;
Bruno Vajana, Bergamo, IT;
Assignee:
SGS-Thomson Microelectronics S.r.l., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437 45 ; 432 48 ; 432149 ; 432931 ;
Abstract
A method of manufacture of a low-capacitance programmed cell structure for read-only memory circuits comprises a field-effect transistor having conventional source and drain regions separated by a channel region overlaid by the gate of the transistor. This ROM memory cell is programmed by a channel implant extending only from the source region for a selected distance into the channel region.