Patent ID: 7757362
Filing Date: 2010-07-20
Classification: B41J,C23C,H01L,Y10T

Abstract:
1. A method for producing a dielectric film, comprising: a coating step of coating a colloidal solution containing an organometallic compound containing a metal constituting a dielectric film containing at least a lead component to form a dielectric precursor film; a drying step of drying the dielectric precursor film; a degreasing step of degreasing the dielectric precursor film; and a firing step of firing the dielectric precursor film to form a dielectric film, and wherein the drying step includes a first drying step of heating the dielectric precursor film to a temperature lower than a boiling point of a solvent, which is a main solvent of the material, and holding the dielectric precursor film at the temperature for a certain period of time to dry the dielectric precursor film, and a second drying step of drying the dielectric precursor film at a temperature in a range of 140° C. to 170° C., the degreasing step is performed at a degreasing temperature of 350° C. to 450° C. and at a heating-up rate of 15 [° C/sec] or higher, and the firing step is performed at a heating-up rate of 100 [° C/sec] to 150 [° C/sec], wherein the dielectric film containing at least the lead component is lead zirconate titanate (PZT), and a distribution of a Zr/Ti composition in a film thickness direction is rendered less than 3%, when expressed as a value of a Zr/Ti composition gradient analyzed by ESCA, by the drying step, the degreasing step, and the firing step.