| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an aluminum nitride multilayered board which is extremely excellent in mounting reliability for a printed wiring board as a mother board. <P>SOLUTION: In an aluminum nitride multilayered board 2 which is face- mounted via a plurality of short pins on a printed wiring board 14, a dummy short pin 13 not related to an electric connection is provided so as to surround the periphery of a short pin 12a in an outer peripheral part on which thermal stress is easy to concentrate. <P>COPYRIGHT: (C)2003,JPO</p> |
