Patent ID: 6748635
Filing Date: 2004-06-15
Classification: H01L,Y10T

Abstract:
A method for manufacturing a piezoelectric thin film component comprising:a) depositing seed crystals on a crystal grain boundary of a bottom electrode; b) forming a film of a sol composition on the seed crystals, wherein the sol composition includes a high molecular organic compound mixed therein; c) heating the film of the sol composition at a temperature between 300Â° C. and 500Â° C. to gelatinize the film and to remove the organic compound from the film thereby forming a porous gel thin film comprised of amorphous metal oxides; d) baking the porous gel thin film at a temperature between 500Â° C. and 800Â° C. in a pre-annealing process until the gel thin film is uniformly crystallized and transformed into a crystalline metal oxide film, wherein the pre-annealing process is performed in two stages comprised of a first stage annealing performed at a temperature between 500Â° C. to 600Â° C. and a second stage annealing performed at a temperature between 600Â° C. to 800Â° C.; e) repeating steps b, c and d to laminate consecutive layers of a substantially integrated crystalline thin film; f) performing a final annealing of the substantially integrated film formed in step (e) such that pervoskite crystal growth occurs and a polycrystalline piezoelectric thin film is formed on the bottom electrode; and g) forming a top electrode on the piezoelectric thin film formed in step (f).