Patent ID: 7867869

Claim:
A manufacturing method for a laminated thin-film device comprising a capacitor element having a pair of electrode layers and a dielectric layer disposed between said electrode layers, comprising: performing masking of said dielectric layer; implanting an ion into said dielectric layer to form a well region in said dielectric layer; removing said masking; repeating said performing masking, implanting, and removing said masking when necessary; and annealing, wherein said dielectric layer is made from a material having a perovskite crystal structure expressed by the structural formula ABO 3 (wherein B is one or more elements selected from the group consisting of the IVB group, VB group, VIB group, VIIB group and IB group elements of the periodic table, and A is one or more elements having electric charges in the range from +1 to +3), and the ion to be implanted is an ion that has an electric charge lower than said A.