US 7,333,362 B2
Electrically erasable and programmable, non-volatile semiconductor memory device having a single layer of gate material, and corresponding memory plane
Philippe Gendrier, Grenoble (France); Cyrille Dray, Eybens (France); Richard Fournel, Lumbin (France); Sébastien Poirier, Vizille (France); Daniel Caspar, Saint Hilaire du Touvet (France); and Philippe Candelier, Saint Mury Monteymond (France)
Assigned to STMicroelectronics SA, Montrouge (France)
Appl. No. 10/511,712
PCT Filed Jan. 31, 2003, PCT No. PCT/FR03/00311
§ 371(c)(1), (2), (4) Date Apr. 18, 2005,
PCT Pub. No. WO03/088366, PCT Pub. Date Oct. 23, 2003.
Claims priority of application No. 02 04690 (FR), filed on Apr. 15, 2002; and application No. 02 09454 (FR), filed on Jul. 25, 2002.
Prior Publication US 2005/0219912 A1, Oct. 06, 2005
Int. Cl. G11C 16/04 (2006.01)
U.S. Cl. 365—185.01  [365/185.26; 365/185.02; 365/185.33] 67 Claims
OG exemplary drawing
 
1. A semiconductor memory device comprising:
at least one electrically erasable and programmable non-volatile memory cell including
a layer of gate material,
a floating-gate transistor including a floating gate defined in the layer of gate material, and further including source, drain and channel regions defining a control gate,
a first active zone, and
a second active zone incorporating the control gate and electrically isolated from the first active zone,
a dielectric zone between a first part of the layer of gate material and the first active zone;
the dielectric zone defining a transfer zone for transferring, during erasure of the memory cell, charges stored in the floating gate to the first active zone.