Patent ID: 9462698
Filing Date: 2016-10-04
CPC Classification: H05K,Y10T

Claim Text:
1. A method for manufacturing a metallized substrate comprising the steps of: (i) applying a metal paste composition on a whole surface of a side of a nitride ceramic sinter where a metallized pattern is to be formed, wherein the metal paste composition comprises: a metal component containing a copper powder and a titanium hydride powder, and not containing a silver powder; and a high-viscosity solvent having a viscosity at 25° C. of no less than 100 Pa-s, and wherein the metal paste composition contains 5 to 50 mass parts of said titanium hydride powder and 10 to 50 mass parts of said high-viscosity solvent per 100 mass parts of said copper powder, (ii) firing a substrate obtained through the step (i), thereby forming a titanium nitride layer and an adhesion layer in the order mentioned on or above the nitride ceramic sinter; (iii) forming a copper plating layer on the adhesion layer; (iv) forming a resist pattern on a part of the copper plating layer to be left as a wiring pattern, by a photolithographic method; (v) removing a part of the copper plating layer and the adhesion layer where the resist pattern is not formed, by an etching process; (vi) removing the resist pattern; and (vii) etching an exposed part of the titanium nitride layer.