| 摘要 |
PURPOSE:To perform a ready-made multilayered printed wiring by a method wherein printed boards whose inside layer is wired with certain pattern are used as a semi-completed multilayered printed board. CONSTITUTION:The thin solid line indicates a circuit on the first layer, the thin broken line indicates circuit using a second layer by-pass wiring channel, the thick hatched line slanting in the left side direction indicates the 5th layer by-pass wiring channel, and the hatched thick line slanting in the right side direction indicates the 6th layer by-pass wiring channel. Although the first layer conductor channel disappears at the conduction hole 24, the circuit entering from the left direction is connected to the conduction hole 5 in the direction of right side via the second layer by-pass, appears on the first layer through a conduction hole 26 and connected to the channels is the longitudinal direction. Thus, many kinds of electric circuits are formed of printed wirings using ready- made multilayered printed boards. |
