Patent ID: 8211231

Claim:
A delivery head for deposition of a thin film of material onto a substrate comprising: (a) a plurality of inlet ports comprising at least a first, a second, and a third inlet port for receiving a first, a second, and a third gaseous material, respectively; and (b) an output face separated a distance from the substrate and comprising a first, a second, and a third plurality of substantially parallel elongated output openings, associated with each of the first, the second and the third inlet port, respectively, wherein the delivery head is designed to deliver the first, the second, and the third gaseous materials simultaneously and separately from the associated elongated output openings in the output face to the substrate, each elongated output opening having a length; and (c) a network of interconnecting supply chambers and directing channels for routing each of the first, the second, and the third gaseous materials from its corresponding inlet port to its corresponding elongated output openings; wherein for a given elongated output opening there is at least one gas diffusing channel connected to only the given elongated output opening, the gas diffusing channel being formed by two adjacent plates in which at least one of the two adjacent plates has a relief pattern through which one of the first, the second, and the third gaseous materials flows prior to flowing through the given elongated output opening in the output face, the relief pattern including structure that creates a gas flow backpressure that causes the flow of the first, second, or third gaseous materials to exit uniformly over the length of the given elongated output opening.