Patent ID: 7143929

Claim:
A method for manufacturing a ceramic circuit board, comprising the steps of: preparing a ceramic substrate having a through hole, a metal column with brazing material, and at least two pieces of metal circuit plates, said metal column with brazing material being made longer relative to a thickness of the ceramic substrate, by coating both ends of a metal column which is shorter relative to the thickness of the ceramic substrate, with a brazing material; arranging the metal column with brazing material within the through hole of the ceramic substrate, so that a space defining a cavity is secured between an inner wall surface of the through hole and an outer wall surface of the metal column, and arranging the metal circuit plates on both surfaces of the ceramic substrate in such a way as to stop up the through hole, wherein the cavity is free from any material; and bonding, after melting the brazing material by heating, the metal column and the metal circuit plates together via the molten brazing material.