| 摘要 |
PURPOSE:To make it possible to move a circuit block 1 without changing a circuit topology and to make it possible to perform efficient wiring, in a wiring region held by the sides of an L shaped figure, by dividing segments into the direction along the L shape and the direction in parallel with the direction of the medium angle of the L angle, and providing the wiring. CONSTITUTION:Segments 7 along the direction conforming to the L shape of a channel and segments 8 in parallel with the direction of the medium angle of the L angle are formed on separate two layers. Through holes 5 are provided at the intersections of the wirings of the two layers. The segments are connected and wirings are formed. When the wirings are formed in this pattern, the connecting relation of the wirings 7 in the direction along the L channel and wirings 8 in the direction of the medium angle, i. e., the wiring topology, are not changed even if a circuit block A at the upper right is moved to the medium angle direction 9 of the L angle. The position relation of the wiring in the direction along the L channel with respect to the medium angle direction 9 of the L angle is not changed. In the L channel, the efficient wiring can be performed as in a straight channel. |
