Patent ID: 7407391
Filing Date: 2008-08-05
Classification: H01L

Abstract:
1. A joining structure joining a ceramic substrate having a metal member buried therein and a power supply connector which supplies power to the metal member, the joining structure comprising: a counterbore formed in the ceramic substrate having a large-diameter part and a small-diameter part formed at a bottom center portion of the large-diameter part, wherein at least a part of the metal member is exposed from a bottom of the small-diameter part; a stress relaxation insert member having a body part and a protrusion extending a distance below a bottom surface of the body part and being provided in the counterbore in a state where the body part and the protrusion are fitted into the large-diameter part and the small-diameter part, respectively; and a brazing member connecting the power supply connector to the stress relaxation insert member, and sealing a gap between the counterbore and the stress relaxation insert member.