Patent ID: 8716098
Filing Date: 2014-05-06
Classification: H01L

Abstract:
1. A method for forming a non-volatile memory device configured with a resistive switching element, the method comprising: providing a substrate having a surface region; depositing a first dielectric material overlying the surface region; forming a first wiring structure overlying the first dielectric material; depositing a second dielectric material overlying the first wiring structure; forming a via opening in the second dielectric material to expose a portion of the first wiring structure, while maintaining a portion of the second dielectric material; forming a resistive switching material structure comprising an amorphous silicon material within the via opening; depositing a metal material comprising a silver material, wherein a first portion of the metal material overlies the resistive switching material structure, and wherein a second portion of the metal material overlies at least the portion of the dielectric material, wherein the first portion of the metal material contacts the resistive switching material structure; forming a diffusion barrier layer overlying the metal material, wherein a first portion of the diffusion barrier layer contacts the first portion of the metal material; and selectively removing the second portion of the metal material and a second portion of the diffusion barrier layer overlying the second portion of the metal material to form a second wiring structure using a solution at a predetermined temperature while maintaining the portion of the diffusion barrier material and the first portion of the metal material within the via opening, wherein the solution is selected from a group consisting of: phosphoric acid, acetic acid, nitric acid, water, and combinations thereof.