Patent ID: 7883905

Claim:
A process for production of a thin-film capacitor comprising a lower electrode forming step in which a lower electrode is formed on a substrate, a starting solution coating step in which a starting solution containing a Ba-based organic dielectric starting material, a Sr-based organic dielectric starting material and a Ti-based organic dielectric starting material is coated on the surface of the lower electrode, a metal oxide thin-film forming step in which the organic dielectric starting materials in the starting solution coated onto the surface of the lower electrode are fired to form a barium strontium titanate thin-film, and an upper electrode forming step in which an upper electrode is formed on the surface of the barium strontium titanate thin-film, wherein the barium strontium titanate thin-film has the composition represented by the following formula: (Ba 1-x Sr x ) y TiO 3 (where 0<x<1, y<1), the firing atmosphere for the barium strontium titanate thin-film in the metal oxide thin-film forming step is an oxygen-containing inert gas atmosphere, to form a barium strontium titanate thin-film with a larger capacity density than the capacity density of the barium strontium titanate thin-film formed using an oxygen atmosphere as the firing atmosphere, and the barium strontium titanate thin-film fired in the oxygen-containing inert gas atmosphere has a leakage current density of no greater than 10 −7 A/cm 2 at room temperature and an electric field strength of 100 kV/cm.