Patent ID: 7931937

Claim:
A method for depositing material on a substrate, comprising: introducing a material including a powder and a carrier gas into a first chamber including an interior, wherein the first chamber comprises a heater tube within the interior of the first chamber heated by resistive heating to a temperature high enough that at least a portion of the powder vaporizes into a vapor, and wherein the first chamber is permeable to vapor but impermeable to powder, to ensure that powder is unable to pass through the first chamber; passing the vapor through the first chamber; passing the vapor through at least one outlet connecting the first chamber to a second chamber, wherein the second chamber comprises a distribution manifold at least partially sheathing the first chamber; directing a mixture of the vapor and carrier gas through a second chamber to form a substantially uniform vapor/carrier gas composition; and directing the substantially uniform vapor/carrier gas composition through a plurality of distribution holes positioned in a line along the length of the second chamber, wherein the substantially uniform vapor/carrier gas composition is directed on a path formed by two external heating elements, wherein the path leads from the second chamber toward a surface of a substrate having a temperature lower than the vapor.