| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring board having good electrical characteristics in which short circuit does not take place even when two lines having parts parallel with each other pass above a through hole. SOLUTION: In the wiring board, insulation layers and conductor layers are formed alternately in layers and a through hole DGH penetrates a power supply layer and a ground layer VG composing the conductor layer in the thickness direction. Two lines DP having parts parallel with each other and passing above the through hole DGH are provided on the upper surface of the insulation layers B1 and B11 arranged on the conductor layer VG having the through hole DGH. Distance s between the two lines DP is increased for the depth d of a recess KB in correspondence with the position of the through hole DGH on the upper surface of the insulation layers B1 and B11. COPYRIGHT: (C)2006,JPO&NCIPI |
