| 摘要 |
PURPOSE:To make it possible to supply a large current, miniaturize a board by making its mounting density higher, and enhance a propagation velocity of signals in the electronic circuit mounting board where a plurality of electronic parts are mounted, particularly in relation to the board for power supplying means. CONSTITUTION:In an electronic circuit mounting board in which there is provided on a supporting board 1, a multi-layered wiring structure formed by a plurality of power supply layers 3 and a plurality of signal wiring layers 4 which are insulated from each other by insulating layers 2, and on the board, a plurality of electronic parts 8 are mounted, and then, the power supply wiring layers 3 and signal wiring layers 4 are connected via 5 to the electronic parts 8 as required, the supporting board 1 itself is made to function as a conductor so that the power can be supplied from the back of the power supply wiring layers 3. Also, the supporting board 1 itself is arranged to function dually as one of the power supply wiring layers in order to reduce the number of the wiring layers. |
