Patent ID: 7405442
Filing Date: 2008-07-29
Classification: H01L

Abstract:
1. An electrically erasable programmable read-only memory (EEPROM) cell, comprising: an inter-gate dielectric layer and a tunnel layer, disposed over a surface of a substrate respectively; a first well region and a second well region, with difference conductive type each other, disposed in the substrate; a doped region, disposed in the substrate under the inter-gate dielectric layer and is used as a control gate; a floating gate, disposed over the tunnel layer and the inter-gate dielectric layer, a source region and a drain region, disposed in the first well region of two sides of the floating gate under the tunnel layer; and wherein the tunnel layer is disposed on a surface of the first well region, and the inter-gate dielectric layer is disposed on a surface of the second well region, and the doped region used as the control gate is disposed in the second well region.