Magnetic random access memory device and formation method thereof
Abstract:
A method of forming a magnetic random access memory (MRAM) device includes forming a bottom electrode layer over a substrate including an inter-metal dielectric (IMD) layer having a metal line therein; forming a barrier layer over the bottom electrode layer; forming a magnetic tunnel junction (MTJ) layer stack over the bottom electrode layer; forming a dielectric layer over the MTJ layer stack; forming an opening in the dielectric layer to expose the barrier layer; filling the opening in the dielectric layer with a top electrode; after filling the opening in the dielectric layer with the top electrode, etching the dielectric layer to expose the barrier layer; and patterning the MTJ layer stack to form an MTJ stack that exposes the bottom electrode layer.
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