Patent ID: 7470607

Claim:
A process comprising: depositing an undoped transparent oxide semiconductor, comprising at least one oxide selected from the group consisting of zinc oxide, indium oxide, tin oxide, and cadmium oxide, in a field effect transistor, by a method selected from the group consisting of: a) physical vapor deposition of an undoped transparent oxide semiconductor in a controlled partial pressure of oxygen of 0.1 P c to 10 P c , in an inert gas; b) resistive evaporation of an undoped transparent oxide semiconductor in a controlled partial pressure of oxygen of 0.1P c to 10P c ; c) laser evaporation of an undoped transparent oxide semiconductor in a controlled partial pressure of oxygen of 0.1 P c to 10 P c , in an inert gas; d) electron beam evaporation of an undoped transparent oxide semiconductor in a controlled partial pressure of oxygen of 0.1 P c to 10 P c , in an inert gas; and e) chemical vapor deposition of an undoped transparent oxide semiconductor in a controlled partial pressure of oxygen of 0.1 P c to 10 P c , in an inert gas, wherein P c is oxygen critical pressure.