Patent ID: 6903410
Filing Date: 2005-06-07
Classification: H01L

Abstract:
1. An electrically erasable and programmable read only memory (EEPROM) cell, comprising: a stacking layer disposed over a substrate, wherein the stacking layer comprises a tunneling dielectric layer, a charge trapping layer and a block dielectric layer sequentially; a gate conductive layer, disposed over the stacking layer; a first source/drain region and a second source/drain region, respectively disposed on two sides of the gate conductive layer in the substrate; a first pocket implant doping region, disposed below the stacking layer in the substrate being adjacent to the first source/drain region; and a second pocket implant doping region, disposed below the stacking layer in the substrate being adjacent to the second source/drain region, and a doping concentration of the first pocket implant doping region is different from a doping concentration of the second pocket implant doping region.