| 摘要 |
PROBLEM TO BE SOLVED: To accurately obtain a signal decay amount of a differential wiring in a multilayer printed wiring board which has a plane divided by a slit in an inner layer and has a differential wiring, disposed crossing to the slit in an outer layer, and to obtain a multilayer printed wiring board where the signal decay amount is proper. SOLUTION: The multilayer printed wiring board has a plane divided by a slit in an inner layer and has a differential wiring (hereinafter, to be referred to as a slit cross differential wiring), disposed crossing the slit in the outer layer. In the multilayer printed wiring board, a signal decay amountα<SB>total</SB>of the slit cross differential wiring is calculated by Formula (1), and the slit cross differential wiring is set so thatα<SB>total</SB>lies within a prescribed range. In the Formula (1),Δαis expressed by Formula (2). COPYRIGHT: (C)2008,JPO&INPIT |
