Patent ID: 6297989
Filing Date: 2001-10-02
Classification: G11C,H01L

Abstract:
A circuit switch, comprising:a non-volatile memory cell, wherein the non-volatile memory cell includes:a metal oxide semiconductor field effect transistor (MOSFET) formed in a semiconductor substrate;a capacitor, wherein the capacitor includes a stacked capacitor formed in a subsequent layer above the MOSFET according to a dynamic random access memory (DRAM) process flow, and wherein a bottom plate of the stacked capacitor is cup shaped having interior walls and exterior walls and is separated by a capacitor dielectric from a top plate; anda vertical electrical via coupling a bottom plate of the capacitor through an insulator layer to a gate of the MOSFET;a wordline coupled to a top plate of the capacitor in the non-volatile memory cell;a sourceline coupled to a source region of the MOSFET in the non-volatile memory cell; anda bit line coupled to a drain region of the MOSFET in the non-volatile memory cell and coupled to logic/select circuit.