Devices and methods of forming an integrated circuit and a FinFET device with a planarized permanent layer are provided. Accordingly, when tomographic images photographed in this manner are displayed side by side, because the depth of photographing varies from one tomographic image to another, it is difficult for an operator to comprehend the positional relation between the photographed images. The second resistance ladder circuit has series-connected resistance circuits each of which has a fixed resistance value, and outputs a plurality of reference voltages.