Patent ID: 7592061

Claim:
A hard coating film of laminate type comprising: more than one layer of a first kind, each of which has a thickness of 1 to 80 nm and a composition represented by the formula (1a) below, (Cr (1-a) Al a )(C (1-x) N x ) (1a) where 0.2≦a≦0.8, and 0.7≦x≦1; and more than one layer of a second kind, each of which has a thickness of 1 to 80 nm and a composition represented by the formula (2a) below, (Zr (1-k) Hf k )(C (1-y) N y ) (2a), where 0≦k≦1, and 0.5≦y≦1, wherein the layers are placed alternately one over another.