In certain aspects of the disclosure, a cell includes a first dummy gate extended along a second lateral direction and on a boundary of the cell, a second dummy gate extended along the second lateral direction and on an opposite boundary of the cell, and a third gate extended along the second lateral direction, wherein the third gate is between the first dummy gate and the second dummy gate. The cell also includes a source between the second dummy gate and the third gate electrically coupled to a power rail. The cell further includes a metal interconnect extended along a first lateral direction approximately perpendicular to the second lateral direction and above the first dummy gate, the source, and the third gate, wherein the metal interconnect is configured to couple the first dummy gate to the power rail through the source.