Patent ID: 8309235
Filing Date: 2012-11-13
Classification: C23C,Y10T

Abstract:
1. A multilayer film-coated member fabricated by coating the surface of a substrate with at least two hard coating films having different compositions, wherein the first composition hard film of the outermost layer of the hard coating films represented by Si a B b N c C d O e with a+b+c+d+e=1, 0.1≦a≦0.5, 0.01≦b≦0.2, 0.05≦c≦0.6, 0.1≦d≦0.7 and 0<e≦0.2, the second composition hard coating film of the lower layer below the first composition hard coating film is a hard film having at least two selected from Al, Ti, Cr, Ni, Ce, Mg, Nb, W, Si, V, Zr and Mo and N and at least one selected from B, C, O and S and the oxygen content of the film within a range of at least 25 nm from the interface of the first composition hard coating film that is in contact with the underlying layer toward the surface of the first composition hard coating film is limited to a range of less than 3.5 atm. %.