Patent ID: 8614035

Claim:
A phase shift mask blank that is an original plate for a phase shift mask that is used with a semiconductor design rule of 32 nm node and beyond and exposed by an ArF excimer laser beam, comprising: a transparent substrate; and a phase shift film including, as main components, a metal, silicon (Si) and nitrogen (N), on the transparent substrate; wherein a thickness of the phase shift film is equal to or less than 80 nm, the phase shift film has optical characteristics of a transmittance of equal to or greater than 9% and equal to or less than 30% with respect to a wavelength of the ArF excimer laser beam and a phase difference of equal to or greater than 150° and less than 180°, and an extinction coefficient (k) of the phase shift film with respect to light with a wavelength of 400 nm is greater than 0.03.