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:
Nov. 21, 2000
Filed:
Dec. 17, 1998
Federico Pio, Brugherio, IT;
Nicola Zatelli, Bergamo, IT;
Laurent Sourgen, Aix en Provence, FR;
Mathieu Lisart, Aix en Provence, FR;
STMicroelectronics, S.r.l., Agrate Brianza, IT;
STMicroelectronics, S.A., Gentilly, FR;
Abstract
An EEPROM cell is described as having a screening metal structure formed of preference in the first metal layer and located in substantial overlaying relationship at the floating gate terminal. This defeats the possibility of anomalous readings being obtained by measuring the amount of charge on the floating gate terminal. An additional screening metal structure, to be formed in the third and following metal layers, may be provided to fully overlie the cell and provide additional protection against anomalous readings.