Patent ID: 7172807

Claim:
The A surface-coated member comprising the following (1a) through (1c): (1a) the surface-coated member comprising a base body, and a hard coating layer comprising at least a TiCN layer and an Al 2 O 3 layer formed in this order on the surface of the base body; (1b) said TiCN layer comprising TiCN crystal that is grown in a direction perpendicular to said base body; and (1c) said TiCN crystal comprising at least two layers wherein the mean crystal width thereof is larger on the Al 2 O 3 layer side than on said base body side, wherein said TiCN layer comprises a carbon-rich TiCN layer located on top of said Al 2 O 3 layer side where the ratio C/N of proportions of carbon C and nitrogen N is in a range of 1.5â‰¦C/Nâ‰¦4, and a nitrogen-rich TiCN layer located below the carbon-rich TiCN layer where the ratio C/N is in a range of 0.2â‰¦C/Nâ‰¦0.7.