| 摘要 |
<p>PURPOSE:To prevent a phenomenon that a through hole by means of which an electronic component is mounted is detached and separated form a board main body and to enhance the reliability of a printed wiring board which is provided with the through hole in the board main body. CONSTITUTION:In a printed wiring board, a through hole 3 by mean of which an electronic component 1A is mounted is provided in a board main body 10. The printed wiring board is provided with a reinforcement through hole 6 in which land-shaped fins 5 protruding toward the outside from the outer circumferential face of the through hole 3 are provided in such a way that they are coupled to, and advanced to, the inside of the board main body 10.</p> |
