Patent ID: 7242044

Claim:
A thin-film capacitance device composition including a bismuth layer-structured compound whose c-axis is oriented vertically to a substrate surface, wherein said bismuth layer-structured compound is expressed by a formula: —Bi 2 A m−1−x Re x B m O 3m+3 , in which symbol “m” is selected from even numbers, “x” is 0.01 to 2.0, symbol “A” is at least one element selected from Na, K, Pb, Ba, Sr, Ca and Bi, symbol “B” is at least one element selected from Fe, Co, Cr, Ga, Ti, Nb, Ta, Sb, V, Mo and W, and symbol “Re” is at least one element selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu.