Patent ID: 7208324

Claim:
A liquid composition for forming a ferroelectric thin film, wherein in a liquid medium, ferroelectric oxide particles being plate or needle crystals, which are represented by the formula ABO 3 (wherein A is at least one member selected from the group consisting of Ba 2+ , Sr 2+ , Ca 2+ , Pb 2+ , La 3+ , K + and Na + , and B is at least one member selected from the group consisting of Ti 4+ , Zr 4+ , Nb 5+ , Ta 5+ and Fe 3+ ) and have a Perovskite structure and which have an average primary particle size of at most 100 nm and an aspect ratio of at least 2, are dispersed, and a soluble metal compound which forms a ferroelectric oxide by heating, is dissolved, wherein the soluble metal compound is a compound which forms a ferroelectric oxide having a Perovskite structure, which is represented by the formula ABO 3 (wherein A is at least one member selected from the group consisting of Ba 2+ , Sr 2+ , Ca 2+ , Pb 2+ , La 3+ , K + and Na + , and B is at least one member selected from the group consisting of Ti 4+ , Zr 4+ , Nb 5+ , Ta 5+ and Fe 3+ ), by heating.