Patent ID: 8790538

Claim:
A composition for the formation of a ferroelectric thin film which is used in the formation of a ferroelectric thin film of one material selected from the group consisting of PLZT, PZT, and PT, wherein the composition is a liquid composition for the formation of a thin film of a mixed composite metal oxide formed of a mixture of a composite metal oxide A represented by the general formula (1): (Pb x La y )(Zr z Ti (1−z) )O 3 [In the formula (1), 0.9<x<1.3, 0≦y<0.1, and 0≦z<0.9] with phosphorus, and the composition is baked for forming the ferroelectric thin film, the composition comprising: raw materials for the composite metal oxide A; a compound whose organic radical is bound to a P (phosphorus) element through oxygen or nitrogen atoms thereof; and an organic solvent, wherein the raw materials for the composite metal oxide A are a compound whose organic radical is bound to each metal element of Pb, La, Zr and Ti through oxygen or nitrogen atoms thereof, the composition includes 0.3 to 20 mol % of P (phosphorus) element against 1 mol of PLZT, PZT, and PT.