| 摘要 |
PROBLEM TO BE SOLVED: To obtain a multilayer printed wiring board that allows a characteristic impedance of a signal-transmission through-hole provided in the multilayer printed wiring board to be set within a desired range. SOLUTION: An inter-center distance D(m) between the signal-transmission through-hole 1 and each of two ground through-holes 3, 4, a hole diameter a(m) of the signal-transmission through-hole, and a distance r(m) between the signal-transmission through-hole 1 and a clearance hole 6 are set so that the characteristic impedance Z of the signal-transmission through-hole 1 is included in a setting range to characteristic impedances Z<SB>b</SB>(Ω) of first/second transmission lines 2, 9. COPYRIGHT: (C)2007,JPO&INPIT |
