Patent ID: 7935460

Claim:
A mask blank for EUV exposure comprising: a substrate; a reflecting layer which is provided on the substrate and reflects EUV light, the reflecting layer including a two-layer structure of a multi-reflecting film and a capping film formed on the multi-reflecting film; and an absorbent layer which is provided on the reflecting layer and absorbs EUV light, the absorbing layer including a buffer film, an absorbent film formed on the buffer film, and a reflecting film that reflects inspection light formed on the absorbent film; and wherein the multi-reflecting film includes about 40 pairs of alternately laminated Mo films having a thickness of about 2.8 nm and Si films having a thickness of about 4.2 nm, the capping film is TiO 2 film having a thickness of about 20 nm, the buffer film is a CrN film having a thickness of about 10 nm, the absorbent layer is a TaSi film having a thickness of about 70 nm, and the reflecting film is a Cr film having a thickness of about 20 nm.