Patent ID: 8266568

Claim:
A power mesh managing method, implemented by an automatic placement and routing tool, applicable in an integrated circuit, that comprises at least one standard cell and a standard-cell power supplying mesh of the standard cell where the standard-cell power supplying mesh corresponding to a first direction couples to the standard cell, the power mesh managing method comprising: defining a power supplying network including a plurality of first power supplying meshes growing along the first direction and a plurality of second power meshes growing along a second direction wherein the plurality of first power supplying meshes are formed on a first metal layer and the plurality of second power supplying meshes are on a second metal layer; and defining an assistant connecting network on a third metal layer, wherein the assistant connecting network includes a plurality of assistant connecting lines growing along the second direction and, wherein the plurality of assistant connecting lines are directly connected to the second metal layer by via holes, and wherein the width of each assistant connecting line of the assistant connecting network is smaller than the width of each mesh line of the power supplying network; wherein the second metal layer is above the first metal layer and the third metal layer is below the first metal layer.