Patent ID: 7567022

Claim:
A film forming method for forming a perovskite type oxide thin film having a plurality of elements constituting at least one of A site and B site on a substrate, wherein the perovskite oxide is expressed by the following chemical formula (1), that is, (A1 x , A2 y , A3 z (B1 j , B2 k , B3 l , B4 m , B5 n )O 3 . . . (1) (where, element A 1 shows Pb and elements A 2 and A 3 are different from each other and respectively show any one of Bi, Ba, Sr, Ca, and La; elements B1, B2, B3, B4, and B5 are different from each other and show any one of Nb, Yb, Mg, Zn, Sc, Ta, Ti, Zr, In and Ni; x, y and z are real numbers between 0 and 1 (inclusive) satisfying the relation expressed by x+y+z≧1.0; and j, k, l, m and n are real numbers between 0 and 1 (inclusive) satisfying the relation expressed by j+k+l+m+n=1), a plurality of steps of supplying materials containing the elements onto the substrate are included, and the A1, A2, A3, B1, B2, B3, B4, and B5 are divided into a plurality of groups and each material containing elements included in each of the groups is supplied onto the substrate in a separate step.