Patent ID: 8383472

Claim:
A method of manufacturing an inverter, the method comprising: forming a first gate and a second gate on a first region and a second region, respectively, of a substrate; forming a gate insulating layer to cover the first gate and the second gate; forming a first channel material layer directly on the gate insulating layer of the first region; forming a second channel material layer directly on the first channel material layer of the first region and the gate insulating layer of the second region; forming a first channel layer including the first channel material layer and the second channel material layer stacked on the first region, and a second channel layer including the second channel material layer on the second region, by patterning the second channel material layer and the first channel material layer; and forming a first source electrode and a first drain electrode contacting ends of the first channel layer, and forming a second source electrode and a second drain electrode contacting ends of the second channel layer.