Patent ID: 11864469
Assignee: WINBOND ELECTRONICS CORP.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device, comprising:
a magnetic tunneling junction (MTJ) on a substrate, wherein the MTJ comprises
a pinned layer on a bottom electrode layer;
a barrier layer on the pinned layer;
a free layer on the barrier layer; and
a top electrode layer on the free layer;

a spacer around the MTJ and adjacent to sidewalls of the bottom electrode layer, the pinned layer, and the barrier layer, wherein the barrier layer is extended to contact a top surface of the spacer, a sidewall of the barrier layer is aligned with a sidewall of the pinned layer, a thickness of the free layer on the pinned layer is greater than a thickness of the free layer on the spacer, and a width of the free layer is greater than a width of the pinned layer; and
a second inter-metal dielectric (IMD) layer around the spacer, wherein the barrier layer is extended to contact a top surface of the second IMD layer.