Patent ID: 11864477
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 10:
11. A method of forming a memory cell, comprising:
sequentially forming a storage element material, a top electrode material, and a hard mask material on a bottom electrode;
patterning the top electrode material and the hard mask material to form a top electrode and a hard mask layer on the storage element material; and
performing an ion bombardment process to remove a portion of the storage element material thereby forming a storage element layer, wherein the performing the ion bombardment process comprises:
trimming a sidewall of the storage element layer to form a first inclined sidewall; and
trimming a sidewall of the top electrode to form a second inclined sidewall, wherein an angle of the first inclined sidewall is greater than an angle of the second inclined sidewall.