| 摘要 |
<p>In one embodiment the board (10) is attached to a frame (20) comprising a metal plate (22) extending along the board (10) on the welds side. It comprises a continuous sheet (30) so folded as to envelope the board, the sheet comprising an insulating base (32a, 34a, 36a) supporting a conductive screening layer (34b) solely or substantially solely on the side of the components and remote therefrom. In a second embodiment, the board is attached to a frame of insulating material. The sheet comprises a base formed by an electrically conductive screening layer on an insulating layer. A second layer of insulation is provided over the screening layer solely or substantially solely on the side of the components. <IMAGE></p> |
