Patent ID: 7851380
Filing Date: 2010-12-14
Classification: B33Y,C23C,H01L

Abstract:
1. A process of making a thin film transistor comprising at least five layers including a gate layer, a dielectric layer, a channel layer, a source-drain layer, and a protective layer, wherein at least three of the five layers are grown on a substrate by an atomic layer deposition process that is carried out substantially at or above atmospheric pressure, wherein the temperature of the substrate during deposition is under 300° C., and wherein the atomic layer deposition process comprises simultaneously directing a series of gas flows comprising, in order, at least a first reactive gaseous material, an inert purge gas, and a second reactive gaseous material through a plurality of output openings spaced apart from the substrate, and transporting the substrate in a direction relative to the plurality of output openings, and such that any point on the substrate experiences a sequence of the first, the second and the third gaseous materials and whereby the sequence causes a layer to be formed by atomic layer deposition, wherein the atomic layer deposition is carried out using a deposition system that comprises a delivery head and a means for maintaining a substantially uniform distance between the depositing output face of a delivery head and a surface of the substrate during thin film deposition, wherein the delivery head is designed to provide flows of one or more of the gaseous materials to the surface of the substrate for thin film deposition that also provides at least part of a force separating the depositing output face of the delivery head from the surface of the substrate, wherein the deposition system optionally includes an entrance section or an exit section that comprises a non-depositing output face having a plurality of non-depositing output openings designed to provide gas flow of non-reactive gas to the surface of the substrate during at least part of the passage through the deposition system.