| 摘要 |
PURPOSE: To provide an electronic circuit mounting structure, wherein a microelectronic device like a portable telephone can be assembled as simply as possible and a full electromagnetic shielding can be taken to a high-frequency circuit block. CONSTITUTION: A lower shielding box 40 is fitted in a box mounting part 12 of a pedestal 10, a printed board 20 is mounted on the box 40 in such a way as to press down the box 40 and an upper shielding box 50 is mounted on the board 20 in such a way that it is made to cover on the board 20. A ground conductor film 22 formed by patterning on the lower surface of the board 20 is abutted on board contact parts 41 of the box 40 and the inner sides of the side surfaces of the box 50 are abutted on interbox contact parts 42 of the box 40. Accordingly, both shielding boxes are directly or indirectly made to have continuity with the earth conductor film and the upper and lower spaces of a high-frequency circuit block are shielded. |
