Patent ID: 7435487

Claim:
A tool coated with at least one layer of a hard film formed by an arc-discharge ion-plating method, said hard film having a composition comprising metal components represented by Al x Cr 1−x , wherein x is an atomic ratio meeting 0.45≦x≦0.75, and non-metal components represented by N 1−α−β−γ B α C β O γ , wherein α, β and γ are respectively atomic ratios meeting 0≦α≦0.15, 0≦β≦0.35, and 0.01≦γ≦0.25; said hard film having a maximum X-ray diffraction intensity in a (200) face or a (111) face, and a binding energy of Al and/or Cr to oxygen in a range of 525-535 eV in an X-ray photoelectron spectroscopy.