Patent ID: 7763509

Claim:
A method of manufacturing a semiconductor device, comprising: forming a first transistor including a first gate electrode, a first drain electrode and a first source electrode on a substrate; forming a second transistor including a second electrode, a second drain electrode and a second source electrode on the substrate; forming a first stress film over the substrate and over the first gate electrode, the first drain electrode, the first source electrode, the second gate electrode, the second drain electrode and the second source electrode; removing the first stress film over the second gate electrode, the second drain electrode and the second source electrode, and leaving the first stress film over the first gate electrode, the first drain electrode and the first source electrode; after removing the first stress film over the second gate electrode, the second drain electrode and the second source electrode, irradiating with ultraviolet rays the first stress film remaining over the first gate electrode, the first drain electrode and the first source electrode; and after the irradiation, forming a second stress film over the second gate electrode, the second drain electrode and the second source electrode.