| 摘要 |
<p>PURPOSE:To provide an aluminum nitride multi-layer board which has excellent mounting reliability to a printed board which is the mother board. CONSTITUTION:An aluminum nitride multi-layer board 2 is surface-mounted on a printed wiring board through a plurality of short pins. Dummy short pins 13, which do not influence electric connection, are provided so as to surround the short pins 12a on the outer circumference on which heat stress tends to concentrate.</p> |
