Patent ID: 9691973
Date: 2017-06-27
CPC Classifications: C01G,G11C,H01L

Claim:
1. A semiconductor device comprising: a first conductive layer; a second conductive layer; and a dielectric film provided between the first conductive layer and the second conductive layer in cross-sectional view, the dielectric film including a fluorite-type crystal, wherein a positive ion site of the fluorite-type crystal includes at least one of Hf (hafnium) and Zr (zirconium), and a negative ion site of the fluorite-type crystal includes O (oxygen), and following formulae (1) to (13) are satisfied in the fluorite-type crystal, when, among three axes of an original unit cell of the crystal, an axis in a direction with no reversal symmetry is c-axis, a stacking direction of atomic planes of two kinds formed by negative ions disposed at different positions is a-axis, remainder is b-axis, axis length of the a-axis of the original unit cell is a, axis length of the b-axis thereof is b, axis length of the c-axis thereof is c, a parameter is p, and x, y, z, u, v and w are values represented using the parameter p