Patent ID: 8268513

Claim:
A mask blank manufacturing method for forming a resist film on a thin film of a thin film coated substrate formed on a mask blank substrate with the thin film, which becomes a mask pattern, comprising the steps of: storing resist film forming information including information that affects sensitivity change of the resist film, correlating said resist film forming information with the mask blank based upon the identification information that is directly or indirectly assigned to the mask blank, providing the mask blank from a mask blank manufacturing department into a mask manufacturing department, stripping the resist film of the mask blank which has the resist film whose sensitivity change exceeds an allowable range and which has been returned to the mask blank manufacturing department from the mask manufacturing department, based on a correlation between the resist film forming information and the mask blank, the resist film being formed on the thin film before forming the mask pattern, and forming again a resist film on the thin film stripped of the resist film by reutilizing film information of the thin film, the film information being obtained at the time of or after formation of the thin film and being stored in correlation with the mask blank, to thereby re-manufacture a resist film coated mask blank in the mask blank manufacturing department wherein the film information includes substrate side film information about the thin film on a substrate side that is not in contact with the resist film in case where the thin film is a stacked film in which thin films are stacked in layers and includes defect information.