Patent ID: 6916677

Claim:
A method of manufacturing a magnetic memory device having a memory cell portion and a peripheral circuit portion, comprising: forming a first metal material film in each of the memory cell portion and the peripheral circuit portion; forming a magnetoresistive effect film on the first metal material film in each of the memory cell portion and the peripheral circuit portion; forming a cap film on the magnetoresistive effect film in each of the memory cell portion and the peripheral circuit portion; forming a first cap layer by patterning the cap film of the memory cell portion into a first shape, and forming a second cap layer by patterning the cap film of the peripheral circuit portion into a second shape; forming a first magnetoresistive effect element which functions as a memory element by patterning the magnetoresistive effect film of the memory cell portion into the first shape by using the first cap layer, and forming a second magnetoresistive effect element which functions as a dummy by patterning the magnetoresistive effect film of the peripheral circuit portion into the second shape by using the second cap layer; forming a first metal layer by patterning the first metal material film of the memory cell portion into a third shape, and forming a second metal layer by patterning the first metal material film of the peripheral circuit portion into a fourth shape; forming a first insulating film on the first and second cap layers and the first and second metal layers in each of the memory cell portion and the peripheral circuit portion; flattening the first insulating film; and removing the first insulating film until a surface of the first cap layer is exposed.