Patent ID: 8053311

Claim:
A method of manufacturing a dielectric film comprising a composite oxynitride containing an element A being Hf, an element B being Al or Si, and N and O, the method including: a step of forming a film including a composite oxynitride whose mole fraction of the element A, the element B, and N expressed as B/(A+B+N) ranges from 0.015 to 0.095 and mole fraction of the element A, the element B, and N expressed as N/(A+B+N) equals or exceeds 0.045, by magnetron sputtering using a target made up of the element A and the element B; and a heat treatment step for crystallizing the film including the composite oxynitride to form a composite oxynitride having a crystalline structure with a cubical crystal incorporation percentage of 80% or higher and a value of a ratio [220]/[111] of a [220] peak intensity and a [111] peak intensity in an X-ray diffraction spectrum of 0.6 or greater, wherein a mole fraction between the element A and the element B in the composite oxynitride is adjusted by mixing a ratio of the element A and the element B in the target, and a ratio of the N element is adjusted by flow rate of nitrogen gas introduced during the magnetron sputtering.