Patent ID: 6927446
Filing Date: 2005-08-09
Classification: H01L

Abstract:
1. A nonvolatile semiconductor memory device, comprising: a semiconductor substrate of a first conductive type; first and second diffused layers of a second conductive type on the surface of the semiconductor substrate, with a channel region of the semiconductor substrate therebetween; first and second laminated films above edge portions of the channel region and above edge portions of, respectively, the first and the second diffused layers, each laminated film being laminated from the semiconductor substrate and the respective diffused layer in the order of a first insulating layer as a first film, a second insulating layer or a semiconductor layer as a second film, and a third insulating layer as a third film; a fourth insulating layer on the semiconductive substrate channel region at a location where the laminated films are absent; each of the second insulating layers or each of the semiconductor layers having a fifth insulating layer on a side wall thereof; and a gate electrode comprising a first conductive film on the fourth insulating layer and second and third conductive films of the first and second laminated films, respectively, the gate electrode entirely overlying the upper sides of fourth insulating layer, the first laminated film, and the second laminated film.