Patent ID: 7292455

Claim:
A multilayered power supply line having a metal-insulator-metal structure, and comprising: a plurality of strips, including: a first metal strip to serve as a wiring metal; a second metal strip located below the first metal strip; and a third metal strip to serve as a capacitor metal, said third metal strip being sandwiched between the first metal strip and the second metal strip; and an insulator embedded into gap portions defined among the first metal strip, the second metal strip, and the third metal strip; wherein the first metal strip, the second metal strip, and the third metal strip are lengthwise mutually parallel, wherein the second metal strip is electrically connected to the first metal strip and thereby supplied with power equal in potential to the first metal strip, wherein the first metal strip and the second metal strip are equal in wiring width, wherein some of the strips are supplied with a source potential of an external power supply and others of the strips are supplied with a ground potential, wherein the source potential and the ground potential alternate in first metal strips which are disposed in a generally planar layer consisting of a plurality of the first metal strip, wherein the source potential and the ground potential alternate in adjacent strips of the first metal strip and the third metal strip, and wherein the potential is similar in adjacent strips of the first metal strip and the second metal strip, whereby capacitors are configured by potential differences between the first metal strip and the second metal strip and between the first metal strip and the third metal strip.