| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem that high-frequency signals can not be surely transmitted in a conventional wiring board because the high-frequency signals are much reflected when they propagate through a wiring conductor. <P>SOLUTION: A new wiring board is composed of an insulating board 1 formed of, at least, one of an aluminum oxide sintered body, an aluminum nitride sintered body, and a silicon nitride sintered body; and a wiring conductor 2 which transmits high-frequency signals and is formed on the insulating board 1. Irregularities of the surface of the wiring conductor 2 are each set at 50μm or below. <P>COPYRIGHT: (C)2004,JPO</p> |
