Patent ID: 11950519
Assignee: HEFEI RELIANCE MEMORY LIMITED
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method to form a non-volatile memory cell, the method comprising:
forming a first dielectric layer on a first metal line;
etching a first via hole to reach the first metal line;
forming a bottom electrode in the first via hole;
forming a resistive layer, a top electrode, and a second dielectric layer on the bottom electrode and the first dielectric layer;
oxidizing the resistive layer and the top electrode to form side portions covering sides of the top electrode and the resistive layer;
forming a side wall layer covering the second dielectric layer and the side portions;
forming a second via hole penetrating the side wall layer and the second dielectric layer to reach the top electrode; and
forming a contact wire in the second via hole such that a width of the contact wire is less than a width between lateral outer surfaces of the side portions.