Patent ID: 9054298
Filing Date: 2015-06-09
Classification: B82Y,H01F,H01L

Abstract:
1. A method of manufacturing a spin transfer torque magnetic random access memory (STTMRAM) magnetic tunnel junction film stack comprising: a) depositing a magnetic interface layer on top of a barrier layer to form a magnetic tunnel junction (MTJ); b) annealing the STTMRAM magnetic tunnel junction film stack with the magnetic interface layer exposed on top at a first temperature; c) cooling down the STTMRAM MTJ film stack to a second temperature that is lower than the first temperature; and d) continuing depositing a top layer on top of the magnetic interface layer, the top layer being made of a single layer or having a multi-layer structure, wherein steps a) and b) are carried out without exposing the MTJ film stack to atmospheric environment.