Patent ID: 8207063

Claim:
A process of making an n-type zinc-oxide-based thin film semiconductor, for use in a transistor by depositing a thin film material on a substrate, comprising: simultaneously directing a series of gas flows along elongated substantially parallel channels, and wherein the series of gas flows comprises, in order, a first reactive gaseous material, an inert purge gas, and a second reactive gaseous material, optionally repeated a plurality of times, wherein the first reactive gaseous material is capable of reacting with a substrate surface treated with the second reactive gaseous material to form the n-type zinc-oxide-based thin film semiconductor, wherein the first reactive gaseous material is a volatile organo-zinc precursor compound comprising both zinc and organic groups; introducing a volatile acceptor dopant precursor into the first reactive gaseous material, the second reactive gaseous material, the inert purge gas, or an additional gas flow of a supplemental gaseous material; wherein the process is carried out substantially at or above atmospheric pressure, and wherein the temperature of the substrate during deposition is under 250° C., whereby the volatile acceptor dopant precursor reacts and is incorporated as an acceptor dopant in the n-type zinc-oxide-based thin film semiconductor; and supplying the one or more of the first and second reactive gaseous materials and the inert purge gas, to the substrate surface by a deposition device having a face, in order to provide a pressure that creates a gas bearing delivery head in the deposition device, thereby maintaining a separation of the substrate surface from the face of the deposition device of 0.3 mm or less.