Patent ID: 6372369
Filing Date: 2002-04-16
Classification: C23C,Y10T

Abstract:
A hard film having a crystal structure comprised of mixed phases of CrN and TiN, and containing at least one selected from oxygen and carbon in a solid solution state in the CrN and TiN crystals, and having a crystal particle size of less than 1 &mgr;m, and having one of any of the following compositions:(a) chromium of 40 to 75 percent by weight, titanium of 10 to 40 percent by weight, oxygen of 0.5 to 15 percent by weight and the remainder of nitrogen; (b) chromium of 40 to 75 percent by weight, titanium of 10 to 40 percent by weight, carbon of 0.5 to 10 percent by weight and the remainder of nitrogen; (c) chromium of 40 to 75 percent by weight, titanium of 10 to 40 percent by weight, oxygen of 0.5 to 15 percent by weight, carbon of 0.5 to 10 percent by weight, the total content of oxygen and carbon within 20 percent by weight and the remainder of nitrogen.