Patent ID: 7608881

Claim:
A thin-film device comprising: a substrate; a flattening film made of an insulating material and disposed on the substrate; a lower conductor layer disposed on the flattening film; a dielectric film disposed on the lower conductor layer; and an upper conductor layer disposed on the dielectric film, wherein: the dielectric film has a thickness that falls within a range of 0.02 to 1 μm inclusive and that is smaller than a thickness of the lower conductor layer; a portion of a top surface of the substrate is exposed at a top surface of the flattening film; a surface roughness in maximum height of the top surface of the flattening film is smaller than a surface roughness in maximum height of the top surface of the substrate, and is equal to or smaller than the thickness of the dielectric film; and a surface roughness in maximum height of a top surface of the lower conductor layer is equal to or smaller than the thickness of the dielectric film.