Patent ID: 7312499
Filing Date: 2007-12-25
Classification: G11C,H01L

Abstract:
1. A semiconductor storage device comprising: a field effect transistor which has a gate electrode formed on a semiconductor substrate via a gate insulator and a pair of source/drain diffusion regions formed on portions of a semiconductor substrate surface corresponding to opposite sides of the gate electrode; a coating film which is made of a dielectric having a function of storing electric charge and formed on the semiconductor substrate in such a manner as to cover an upper surface and side surfaces of the gate electrode; an interlayer insulator formed on and in contact with the coating film; and contact members which extend vertically through the interlayer insulator and coating film on the source/drain diffusion regions and which are electrically connected to the source/drain diffusion regions, respectively, wherein the coating film and the interlayer insulator are made of materials which are selectively etchable to each other.