| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability of a printed wiring board that has a built-in electronic component.SOLUTION: A first projection 28a with a narrow width is provided with a first cavity 26A with a narrow width, while a second projection 28b with a wide width is provided with a second cavity 26B with a wide width. Accordingly, electronic components 110 can be positioned appropriately in each of the first cavity with a narrow width and the second cavity with a wide width which are present in a mixed manner. |
