| 摘要 |
A metal-ceramic composite (53) is provided in which a solder layer (15) and a ceramic member (55) are held in contact with each other at an annular area extending along an entire circumference of an axial end surface (55a) of the ceramic member (55) and having an average width W (mm), and in which the average width W and an outer diameter D (mm) of the ceramic member (55) satisfy D >/= 30 and (1/6) x D >/= W >/= (D/30) + 2.6. <IMAGE> |
