Patent ID: 6354484
Filing Date: 2002-03-12
Classification: B23K,B32B,C04B,H05K,Y10S,Y10T

Abstract:
A process for producing a metal-ceramic composite substrate by joining a metal plate to a ceramic substrate, which comprises the steps of:adding 10-14 parts by weight of a vehicle to 100 parts by weight of a powder of which the solid content comprises 90.0Ëœ99.5% of an Ag powder, 0Ëœ9.5% of a Cu powder and 0.5Ëœ4.0% of an active metal powder on a weight basis; blending the respective ingredients to form a brazing material; applying the brazing material to the ceramic substrate; superimposing a metal plate on the applied brazing material and heating the assembly at a temperature not higher than the melting point of the brazing material to form a joint of the metal plate and the ceramic substrate; and applying an etching resist on the metal plate of the joint to form a circuit pattern and etching the metal plate to form a metalized circuit.