Patent ID: 8748197
Filing Date: 2014-06-10
Classification: H01L

Abstract:
1. A method of fabricating a magnetic device comprising: providing a magnetic tunnel junction (MTJ) structure over a device wherein said MTJ comprises a tunnel barrier layer between a free layer and a pinned layer, a top electrode over said free layer, and a bottom electrode under said pinned layer; forming a hard mask layer on said top electrode; patterning said hard mask layer, said top electrode, said free layer, said tunnel barrier layer, and said pinned layer to define said magnetic tunnel junction (MTJ) structures; depositing a first dielectric layer over said MTJ structures and planarizing said first dielectric layer to expose said top electrode; thereafter patterning said top electrode and said free layer; thereafter depositing a second dielectric layer over said MTJ structures and planarizing said second dielectric layer to expose said top electrode; thereafter depositing a third dielectric layer over said MTJ structures; and forming a metal line contact through said third dielectric layer to said top electrode to complete fabrication of said magnetic device.