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:
Apr. 16, 2002
Filed:
Jul. 18, 2001
Andrew Marshall, Dallas, TX (US);
Joseph A. Devore, Dallas, TX (US);
Ross E. Teggatz, McKinney, TX (US);
Wayne T. Chen, Plano, TX (US);
Ricky D. Jordanger, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An EEPROM cell ( ) formed on a substrate ( ) using conventional process steps is provided. The cell ( ) includes first ( ) and second ( ) conductive regions in the substrate ( ) below the substrate's outer surface ( ), and the first ( ) and second ( ) conductive regions are laterally displaced from one another by a predetermined distance ( ). The cell ( ) also includes an insulating layer ( ) outwardly from the outer surface ( ) of the substrate ( ) positioned so that its edges are substantially in alignment between the first ( ) and second ( ) conductive regions. The cell ( ) further includes a floating gate layer ( ) outwardly from the insulating layer ( ) and in substantially the same shape as the insulating layer ( ). The cell ( ) also includes a diffusion region ( or ) that extends laterally from at least one of the first ( ) and second ( ) conductive regions so as to overlap with the insulating layer ( ). The diffusion region ( or ) provides a source of charge for placement on the floating gate layer ( ) when programming the EEPROM cell ( ).