Patent ID: 9748310
Date: 2017-08-29
CPC Classifications: G11C,H01L

Claim:
1. A magnetic random access memory (MRAM) device, comprising: a spacer disposed on an electrode, the spacer comprising a conductive material, and redeposited metal arranged on a sidewall of the spacer; a magnetic tunnel junction (MTJ) disposed directly on the spacer, the MTJ comprising a reference layer, a free layer, and a tunnel barrier layer between the reference layer and the free layer, and the reference layer positioned in contact with the spacer, the MTJ being substantially free of redeposited metal; a hard mask disposed on the free layer of the MTJ; an interlayer dielectric (ILD) disposed on and around the hard mask, the MTJ, and the spacer; an insulating layer arranged directly on sidewalls of the hard mask, the MTJ, and the redeposited metal arranged on the sidewall of the spacer; and a trench that extends through the ILD and comprises a metal that forms a contact electrode, the contact electrode positioned in contact with a top surface of the hard mask.