Patent ID: 7635900

Claim:
An electronic device comprising: a semiconductor layer containing silicon as a major component; and an epitaxially grown dielectric film provided 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 includes a dielectric material having a Ruddlesden-Popper type structure, the Ruddlesden-Popper type structure is expressed by a chemical formula A n+1 B n O 3n+1 , the element A including 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%, the element B includes at least one selected from a group consisting of Ti, Zr and Hf, a percentage of Ti content in the element B is not larger than 80% in a case where n=1, a percentage of Ti content in the element B is not larger than 70% in a case where n=2, a percentage of Ti content in the element B is not larger than 60% in a case where n=3, and a percentage of Ti content in the element B is not larger than 50% in a case where n=4.