| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wiring board where the main body of a substrate composed of an insulating material and a metallic radiating member are accurately positioned and fixed, and also metal-plating is reliably performed on the side surfaces of the radiating member. <P>SOLUTION: The wiring board 1 includes: the main body 2 made of ceramic (the insulating material), having a front surface 3 and a rear surface 4; a through-hole 5 penetrating a part between the front and rear surfaces 3, 4 of the main body 2; and the radiating member 10 where the pillar 12 having an element mounting surface 13 at the upper end is inserted to the through-hole 5, and the base 16 continued under the pillar 12 is adjacent to the through-hole 5 and fixed to a recess 9 opened in the rear surface 4 of the main body 2. A projection 8 to contact the side surfaces 14 by projecting from the lower part of the inner wall 6 in the main body 2 is formed between the inner wall 6 of the through-hole 5 in the main body 2 and the opposing side surfaces 14 of the pillar 12 in the radiating member 10. A space s is formed between the inner wall 6 of the through-hole 5 and the side surfaces 14 of the pillar 12 via the projection 8. <P>COPYRIGHT: (C)2008,JPO&INPIT |
