Patent ID: 8951603
Filing Date: 2015-02-10
Classification: C30B,H01L,Y10T

Abstract:
1. A method for producing a ferroelectric thin film comprising: forming a ferroelectric thin film on a base electrode of a substrate having a substrate body and the base electrode that has crystal faces oriented in the (111) direction, wherein the formation of the ferroelectric thin film includes performing formation of an orientation controlling layer by a process including coating a composition for forming the ferroelectric thin film on the base electrode, performing calcination of the coated composition, and subsequently performing firing of the coated composition to crystallize the coated composition, where an amount of the composition for forming the ferroelectric thin film coated on the base electrode is controlled such that a thickness of the orientation controlling layer after crystallization is in a range of 5 nm to 30 nm, and thereby controlling the preferred orientation of crystals of the orientation controlling layer in the (110) plane, and wherein the method further comprises forming a crystal diameter controlling layer on the base electrode before forming the orientation controlling layer, wherein the orientation controlling layer is formed on the crystal diameter controlling layer and the crystal diameter of the orientation controlling layer is equal to the crystal diameter of the crystal diameter controlling layer as a result.