| 摘要 |
PROBLEM TO BE SOLVED: To provide a relay board capable of imparting high reliability by preventing damage to a relay board body.SOLUTION: A relay board 31 comprises a relay board body 39 of a substantially plate shape and a plurality of conductor posts 36 penetrating between a board principal surface 32 and a board rear surface 33 of the relay board body 39. A semiconductor element mounting region 24 in which a plurality of semiconductor element connection terminals 37 for mounting a semiconductor element exist is set on the board principal surface 32. A covering material 61 covering at least a part of a board side surface 34 is tightly formed on a board side surface 34 of the relay board body 39. The covering material 61 protrudes to the board principal surface 32 side and includes a salient 62 disposed around the semiconductor element mounting region 24. |
