SURFACE-COATED MACHINING TOOL

摘要

PROBLEM TO BE SOLVED: To provide a surface-coated machining tool especially used for grooving, cutting and drilling a printed circuit board on which integrated circuits and various electronic parts are mounted. SOLUTION: A cemented-carbide base material containing tungsten carbide and cobalt, with the cobalt inclusion amount being 4 mass% or more and 12 wt.% or less, is furnished. A hard carbon thin film substantially made of only carbon coated by a physical vapor deposition using graphite as material is coated on the cemented-carbide base material. At least a single layer of the hard carbon thin film is coated. COPYRIGHT: (C)2007,JPO&INPIT