US Patent 7329938 Semiconductor integrated circuit

A semiconductor integrated circuit includes a first cell spanning one of the p-wells and one of the n-wells adjacent to each other, and having one end on a dividing line inside the p-well and another end on a dividing line inside the n-well, and having a height determined by the one end and the another end; and a second cell, spanning another one of the p-wells and another one of the n-wells adjacent to each other, with a height covering the entire widths of the p- and n-wells measured along the column direction, the height of the second cell is double that of the first cell.