Patent ID: 8264023

Claim:
A semiconductor device, comprising: a semiconductor substrate; a lower electrode formed over a main surface of the semiconductor substrate; a magnetoresistive element including a fixed layer whose magnetization direction is fixed disposed over a main surface of the lower electrode, a tunneling insulating film disposed over a main surface of the fixed layer, a free layer whose magnetization direction is variable disposed over a main surface of the tunneling insulating film; an upper electrode disposed over a main surface of the free layer; and a protective film covering sides intersecting main surfaces of the lower electrode, the fixed layer, the tunneling insulating film, the free layer, and the upper electrode, wherein a width of the upper electrode is smaller than that of each of the lower electrode and the fixed layer in a direction intersecting a lamination direction of the lower electrode, the fixed layer, the tunneling insulating film, the free layer, and the upper electrode.