Patent ID: 7919365

Claim:
A method of fabricating a zinc oxide (ZnO) thin film transistor (TFT) comprising: forming a semiconductor channel including a ZnO thin film in an oxygen atmosphere; forming conductive oxygen diffusion layers contacting opposite sides of the semiconductor channel, the conductive oxygen diffusion layers including indium tin oxide (ITO); forming source and drain electrodes over the conductive oxygen diffusion layers; and heating the semiconductor channel, the conductive oxygen diffusion layers and the source and drain electrodes such that oxygen of the semiconductor channel diffuses into the conductive oxygen diffusion layers and a density of oxygen of the semiconductor channel is adjusted, wherein the diffusion of oxygen into the conductive oxygen diffusion layers is controlled by adjusting at least one of temperature and duration of heating, and the semiconductor channel, the conductive oxygen diffusion layers and the source and drain electrodes are heated together at a temperature of less than about 350° C. and greater than about room temperature.