Patent ID: 7400019

Claim:
An electronic device comprising: a semiconductor layer including silicon as a major component; and a dielectric film epitaxially grown directly on a major surface of the semiconductor layer, a difference between 2 1/2 times lattice constant of the dielectric film along the major surface and a lattice constant of the semiconductor layer along the major surface being not larger than 1.5%, wherein the dielectric film consists of a dielectric material having a Ruddlesden-Popper type structure, the Ruddlesden-Popper type structure has a structure where a layer expressed by a chemical formula A 2 BO 4 and a layer expressed by a chemical formula A 3 B 2 O 7 are stacked by turns, the element A includes at least one selected from a group consisting of Ba, Sr, Ca and Mg, a percentage of Mg content in the element A is not larger than 10%, and the element B including at least one selected from a group consists of Ti, Zr and Hf.