Patent ID: 9136464
Filing Date: 2015-09-15
Classification: B82Y,H01L,Y10S

Abstract:
1. A process for manufacturing a magnetic random access memory element, the process comprising in sequence: forming a first ferromagnetic layer comprising one of a fixed layer or a free layer; forming a first metal material over the first ferromagnetic layer; oxidizing at least a portion of the first metal material to a first oxidation dose to provide a first metal oxide; forming a second metal material over the first metal oxide; oxidizing at least a portion of the second metal material to a second oxidation dose, which is different from the first oxidation dose, to provide a second metal oxide, wherein the second oxidation dose is greater than the first oxidation dose; forming a third metal material over the second metal oxide; oxidizing at least a portion of the third metal material to a third oxidation dose to provide a third metal oxide, wherein the third oxidation dose is greater than the first oxidation dose and less than the second oxidation dose; and forming a second ferromagnetic material layer comprising the other of the fixed layer or the free layer over the third metal oxide.