RIGID COATING FILM, MEMBER COATED WITH RIGID COATING FILM, PRODUCTION PROCESSES THEREFOR, AND TARGET FOR USE IN PRODUCING RIGID COATING FILM

摘要

An arc-ion-plated hard coating having a composition represented by (Al x Ti y W z ) a N( 1-a-b )O b , wherein x, y, z, a and b are numbers meeting by atomic ratio 0.6 ‰¤ x ‰¤ 0.8, 0.05 ‰¤ y ‰¤0.38, 0.02 ‰¤ z ‰¤ 0.2, x + y + z = 1, 0.2 ‰¤ a ‰¤ 0.8, and 0.02 ‰¤ b ‰¤ 0.10), and having W-O bonds with substantially no Al-O bonds when identified by X-ray photoelectron spectroscopy, and having only a NaCl-type structure in an X-ray diffraction pattern.