Patent ID: 7648781
Filing Date: 2010-01-19
Classification: C23C,Y10T

Abstract:
1. A hard film comprising a total of two or more layers of a first unit layer and a second unit layer arranged alternately, the first unit layer comprising at least one of a hard film A1 and a hard film A2; and the second unit layer comprising at least one selected from the group consisting of a hard film B1, a hard film B2, and a hard film B3, wherein the first unit layer has a thickness of 200 nm or less, and the second unit layer has a thickness of 200 nm or less, wherein the multilayer hard film as a whole has an average composition comprising (Zr wherein “a” and “x” are the atomic ratios of hafnium (Hf) and nitrogen (N), respectively, and wherein x is not equal to 1, wherein the hard film A1 is a hard film comprising (Zr wherein “a” and “x” are the atomic ratios of hafnium (Hf) and nitrogen (N), respectively, wherein the hard film A2 is a hard film comprising (Zr 1-a-c , Hf a , D c )(C 1-x N x ) and satisfying following Conditions (1B) to (3B): wherein D is at least one of silicon (Si) and boron (B); and “a”, “c”, and “x” are the atomic ratios of Hf, D, and N, respectively, wherein the hard film B1 is a hard film comprising M(C wherein M is at least one of tungsten (W) and molybdenum (Mo); and “x” is the atomic ratio of nitrogen (N), wherein the hard film B2 is a hard film comprising Si wherein “y” and “x” are the atomic ratios of carbon (C) and nitrogen (N), respectively, and wherein the hard film B3 is a hard film comprising B wherein “y” and “x” are the atomic ratios of carbon (C) and nitrogen (N), respectively.