Coated cutting tool insert

A method of making a cutting tool insert wherein said method comprises coating a substrate made of cemented carbide, titanium based carbonitride or ceramics having an upper face and at least one clearance face intersecting said upper face to define cutting edges with a hard coating comprising a laminar, multilayered structure MX+NX+MX+NX . . . , the alternating MX and NX layers comprising metal oxides, the metal elements M and N chosen from aluminum, zirconium, titanium, hafnium and chromium, the repeat period of said multilayer being greater than or equal to about 20 nm but less than about 200 nm, by CVD technique comprising holding the substrate to be coated at a temperature of from about 950 to about 1050° C. and contacting said substrate with a hydrogen carrier gas containing one or more metals halides and a hydrolyzing and/or an oxidizing agent, and keeping the oxidation potential of the CVD reactor atmosphere prior to nucleation of the metal oxides at a low level with a concentration of water vapor, H2O, or other oxidizing species below about 5 ppm.