Patent ID: 8426306

Claim:
A method of forming a non-volatile memory device, comprising: providing a substrate having a surface region; forming a first dielectric material overlying the surface region of the substrate; forming a first conductor material overlying the first dielectric material, the first conductor material comprising a first polysilicon material; depositing a second dielectric material overlying the first polysilicon material; forming a second conductor material overlying the second dielectric material, the second conductor material comprising a second polysilicon material; forming a third dielectric material overlying the second conductor material; forming a masking layer overlying the third dielectric material; subjecting the third dielectric material, the second conductor material, the second dielectric material, and the first conductor material to a first pattern and etch process to form at least a first wordline associated with a first switching device and a second wordline associated with a second switching device from the first conductor material, a third wordline and associated with a third switching device, a fourth wordline associated with a fourth switching device from the second conductor material, and a via opening separating the first wordline from the second wordline and separating the third wordline from the fourth wordline; forming a resistive switching material comprising an undoped amorphous silicon material substantially free of dopants, in a first portion of the via opening conformably overlying the via opening; and forming a metal material in a second portion of the via opening overlying the undoped amorphous silicon material and substantially filling the via opening, the metal material being connected to a common bitline for each of the first switching device, the second device, the third switching device, and the fourth switching device.