Patent ID: 7159310

Claim:
A method for producing an electronic part mounting substrate wherein a metal member is bonded to one side of a ceramic substrate, and one side of a metal plate is bonded to the other side of the ceramic substrate, an electronic part being mounted on the other side of the metal plate, said method comprising the steps of: arranging a ceramic substrate and an electronic part in a mold so that the ceramic substrate is spaced from the electronic part; injecting a molten metal into the mold so that the molten metal contacts both sides of the ceramic substrate and the electronic part; cooling the mold to solidify the molten metal, to form a metal member on one side of the ceramic substrate so that the metal member is bonded directly to the one side of the ceramic substrate, and to form a metal plate on the other side of the ceramic substrate so that one side of the metal plate is bonded directly to the other side of the ceramic substrate; and bonding the electronic part directly to the other side of the metal plate when the metal plate is formed.