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. 02, 2002
Filed:
Mar. 03, 2000
Applicant:
Inventors:
Giovanna Dalla Libera, Monza, IT;
Matteo Patelmo, Trezzo Sull' Adda, IT;
Bruno Vajana, Bergamo, IT;
Nadia Galbiati, Seregno, IT;
Assignee:
STMicroelectronics S.r.L., Agrate Brianza, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/976 ; H01L 2/9788 ;
U.S. Cl.
CPC ...
H01L 2/976 ; H01L 2/9788 ;
Abstract
To increase the facing surface and thus the coupling between the floating gate and control gate regions of a memory cell, the floating gate and control gate regions have a width that is not constant in different section planes parallel to a longitudinal section plane extending through the source and drain regions of the cell. In particular, the width of the floating gate and control gate regions is smallest in the longitudinal section plane and increases linearly in successive parallel section planes moving away from the longitudinal section plane.