Patent ID: 8686567

Claim:
A semiconductor device comprising: a plurality of first conductive lines extending in a first direction formed on a first layer; a plurality of second conductive lines extending in a second direction different from the first direction formed on a second layer provided above the first layer; and a plurality of via conductors each connecting one of the first conductive lines to an associated one of the second conductive lines, the via conductors being provided on a third layer provided between the first and second layers, wherein each of the via conductors has a circle-shaped or an ellipse-shaped having larger in area than the via conductor of the circle-shaped, the via conductors of the ellipse-shaped having a major axis extending in the second direction, the first conductive lines include a plurality of first signal lines and a plurality of first power supply lines so as to be adjacent to each other, the second conductive lines include a plurality of second signal lines and a plurality of second power supply lines so as to be adjacent to each other, the third layer includes a plurality of first regions, each of the first regions being provided between one of the first signal lines and an associated one of the second signal lines, at least two via conductors of the circle-shaped laid out in the second direction or at least one via conductor of the ellipse-shaped are disposed at each of the first regions, each of the first signal lines has a second region that is overlapped with an associated one of the first regions, at least one of the first power supply lines is divided in the first direction so as not to be connected to an adjacent one of the second regions, each of the second signal lines has a third region that is overlapped with an associated one of the first regions, and each of the first power supply lines is connected to an associated one or more of the second power supply lines by at least one of the via conductors.