A display device includes a common active pattern, a first gate electrode, and a second gate electrode. The common active pattern includes an NMOS area, a PMOS area, and a silicide area in a same layer as the NMOS area and the PMOS area. The silicide area electrically connects the NMOS area to the PMOS area. The NMOS area includes a first channel area and an n-doped area contacting the first channel area. The PMOS area includes a second channel area and a p-doped area contacting the second channel area. The first gate electrode overlaps the first channel area, and the second gate electrode overlaps the second channel area.