Patent ID: 6849905
Filing Date: 2005-02-01
Classification: G11C,H01L

Abstract:
1. A charge storage transistor, comprising: an active region comprising a source, a drain, and a channel located between the source and the drain; a gate electrode; and a localized charge storage dielectric located between and in contact with a tunneling dielectric and a blocking dielectric; wherein: a first transistor portion comprises (i) the source; (ii) a first channel portion located adjacent to the source; and (iii) a charge storage region which comprises the localized charge storage dielectric, a first portion of the tunneling dielectric and a first portion of the blocking dielectric; a second transistor portion comprises (i) the drain; (ii) a second channel portion located adjacent to the drain; (iii) a second portion of the tunneling dielectric; and (iv) a second portion of the blocking dielectric; and the second transistor portion excludes charge storage dielectric.