Patent ID: 8330203
Filing Date: 2012-12-11
Classification: H01L

Abstract:
1. A nonvolatile semiconductor memory device comprising: a semiconductor substrate including a memory cell area and a selection transistor area; a first insulation film formed on the semiconductor substrate in the memory cell area; a first gate electrode formed on the first insulation film; a second insulation film formed on an upper surface and a side surface of the first gate electrode; and a second gate electrode formed on the second insulation film, wherein the second gate electrode includes a first portion, a second portion, and a third portion, the first portion is located directly above the first gate electrode, the second portion is located on a side of the first portion, and a level of a bottom surface of the second portion is equal to a level of an upper surface of the second insulation film, wherein the first and second portions are formed of a silicide, and the third portion, which is in contact with the second insulation film formed on the side surface of the first gate electrode, is formed of a silicon.