Patent ID: 7700161

Claim:
A method for depositing a solid film onto a substrate from a reagent solution comprising the steps of: a. providing a supply of aqueous reagent solution maintained in a holding tank at a first temperature at which homogeneous reactions are substantially inhibited within said reagent solution, said reagent solution further containing at least two ligands; b. dispensing a controlled flow of said reagent solution from a showerhead assembly, said controlled flow being periodically replenished; c. positioning said substrate to receive at least a portion of said controlled flow of said reagent over a selected area of said substrate; d. providing a raised structure peripheral to said selected area whereby a controlled volume of said reagent solution may be maintained upon said substrate while excess solution may be recirculated to said holding tank; and, e. heating said substrate and said controlled volume of said reagent solution upon said substrate to a second temperature, higher than said first temperature, whereby deposition of a desired solid phase onto said substrate from said reagent solution may be initiated.