Patent ID: 6449185
Filing Date: 2002-09-10
Classification: G11C,H01L

Abstract:
A semiconductor memory comprising:a storing transistor for storing a data, said storing transistor including a field effect transistor and being selected from a group consisting of (1) an MFS transistor having a gate electrode formed on a ferroelectric film, (2) an MFIS transistor having a gate electrode formed on a multi-layer film of a ferroelectric film and a dielectric film, and (3) an MFMIS transistor including a ferroelectric capacitor formed above a gate electrode of a MIS transistor, and having a well region; a selecting transistor for selecting said storing transistor, said selecting transistor being a field effect transistor having a well region that is isolated from said well region of said storing transistor; a first voltage supply line for supplying a DC voltage to said well region of said storing transistor; and a second voltage supply line independent of said first voltage supply line for supplying a DC voltage to said well region of said selecting transistor.