| 摘要 |
PCT No. PCT/SE96/00370 Sec. 371 Date Aug. 22, 1997 Sec. 102(e) Date Aug. 22, 1997 PCT Filed Mar. 25, 1996 PCT Pub. No. WO96/31107 PCT Pub. Date Oct. 3, 1996A circuit board (1) which comprises a plurality of electrically conductive layers, conductive patterns formed in the layers, and intermediate electrically insulating layers, and which further comprises a surface-related layer (3) which screens against electromagnetic interference, wherein an outermost conductive layer (3) is provided with a plurality of coordinated connection islands (3a-3e) or the like, where selected connection islands are adapted for electrical and mechanical coaction with connection pads (2a-2d) or the like for a surface-mounted discrete component (2). A further electrically conductive layer (4) disposed contiguous with and beneath the outermost conductive layer (3) and separated by an insulating layer is comprised of a layer foil that screens against electromagnetic interference. The electrically conductive layer foil has formed therein a plurality of through-penetrating holes (4a, 4e), each of which is adapted and dimensioned with a cross-sectional size which slightly exceeds the cross-sectional size of an electric conductor (2a) drawn through a respective hole (4a), the electric conductor (2a) being connected at one end, either directly or indirectly, to one of the connection pads (2a-2d) and at its other end directly to a conductor (6a) in a conductor pattern formed in an inner, further electrically conductive layer (6). |
