Patent ID: 6974708
Filing Date: 2005-12-13
Classification: H01L

Abstract:
1. A method of forming a magnetic tunneling junction (MTJ) MRAM device comprising: providing a substrate; a formation process of forming, in a high vacuum deposition system, a bottom conductor layer on said substrate, said formation process further comprising: forming, in the same high vacuum deposition system a lower pinned electrode, said formation further comprising: forming a synthetic antiferromagnetic pinned (SyAP) layer on said pinning layer, said formation comprising a lower ferromagnetic layer formed on said pinning layer, a coupling layer formed on said lower ferromagnetic layer and an upper ferromagnetic layer formed on said coupling layer; forming, in an oxidation chamber an oxygen surfactant layer on said upper ferromagnetic layer; forming, a tunneling barrier layer on said oxygen surfactant layer, said formation further comprising: forming, in said high vacuum system a free layer on said tunneling barrier layer; forming, in said high vacuum system an upper capping layer on said free layer; annealing said MTJ MRAM device to magnetize said pinned layer, said annealing process further enhancing the Al