Patent ID: 8198691

Claim:
A semiconductor device, comprising: a lower electrode formed over a semiconductor substrate; an MTJ element formed over a portion of the lower electrode and having a magnetic film and an upper electrode; and a stress insulating film which covers therewith the surface and side surface of the MTJ element and applies a stress to the MTJ element, wherein the stress insulating film has a tensile stress insulating film which applies a tensile stress to the MTJ element, wherein the MTJ element has a planar shape having a long side/short side ratio exceeding “1”, wherein the stress insulating film has an upper insulating film of MTJ formed directly on the surface and the side surface of the MTJ element, wherein the upper insulating film of MTJ has a planar shape having a long side/short side ratio exceeding “1”, and wherein the long-side direction of the planar shape of the stress insulating film coincides with the short-side direction of the planar shape of the MTJ element.