Patent ID: 8878176

Claim:
A thin-film transistor, comprising: a substrate; a metal oxide semiconductor active layer, the semiconductor active layer comprising source and drain regions doped with non-fluorine donor ions and further doped with fluorine, and a fluorine-doped channel region disposed adjacent to the source and drain regions, wherein the fluorine is not a donor to the source, drain and channel regions and is configured to passivate the source, drain and channel regions with respect to defects in the metal oxide semiconductor active layer to increase mobility; a gate electrode disposed over the semiconductor active layer, configured to induce a continuous conduction channel in the channel region between the source and drain regions; and a gate dielectric material separating the gate electrode and the channel region; wherein the volume concentration of fluorine in the channel region of the semiconductor active layer is between approximately 10 19 and 4×10 20 /cm 3 ; and wherein the volume concentration of fluorine in the source and drain regions is greater than or equal to approximately 5×10 20 /cm 3 .