| 摘要 |
PURPOSE:To enable crosstalk to be reduced among all printed-circuit boards in a laminated printed-circuit board which is constituted by laminating a plurality of printed-circuit boards with a wiring pattern which is printed on a surface of a common substrate or a surface layer. CONSTITUTION:A GND or VCC screening layer 7 is provided between adjacent inner-layer wiring layers 3 and 4 of a laminated PCB and then all inner-layer wiring layers are sandwiched by the GND or VCC screening layer. |
