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:
Dec. 20, 1988
Filed:
Oct. 03, 1985
Giuseppe Corda, Saronno, IT;
Andrea Ravaglia, Monza, IT;
SGS Microelettronica S.p.A., Catania, IT;
Abstract
The invention provides an EPROM memory matrix and a method of writing to an EPROM memory matrix. Two pluralities of parallel source lines alternate with parallel drain lines while floating gate areas span the source and drain lines and parallel control gate lines are arranged perpendicularly to the source and drain lines and superimposed on and self-aligned with the floating gate areas. During the writing operation, the gate and drain lines corresponding to a selected cell are connected to a positive voltage source and the source line corresponding to the selected cell is connected to earth together with all the other source lines of the same plurality while all the source lines of the other plurality are left at a potential intermediate between said positive voltage and earth.