| 摘要 |
PURPOSE:To prevent the generation of troubles such as the increment of electric load or the generation of signal delay by forming wiring areas between respective power supply lines and between respective ground lines and forming bus lines in the wiring areas. CONSTITUTION:Since the power supply lines 21 on a power supply layer 20 are formed by wring patterns directed only in one direction (x direction), a surface margin can be formed over a wide range among respective lines 21. Since the ground lines 31 on a ground layer 30 are formed by wiring patterns directed only in the direction (y direction) rectangular to the lines 21, a surface margin can be formed over a wide range also among the lines 31. Thereby, bus lines 22, 23 can be formed in the space parts, so that the wiring of the bus lines 22, 32 can be shortened or the wiring patterns of respective lines can be simplified. Consequently, the generation of troubles such as the increment of electric load and the generation of signal delay can be prevented. |
