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Dielectric film and semiconductor device using dielectric film including hafnium, aluminum or silicon, nitrogen, and oxygen

Image Number 11 for United States Patent #8053311.

The present invention provides a dielectric film having a high permittivity and a high heat resistance. An embodiment of the present invention is a dielectric film (103) including a composite oxynitride containing an element A made of Hf, an element B made of Al or Si, and N and O, wherein mole fractions of the element A, the element B, and N expressed as B/(A+B+N) range from 0.015 to 0.095 and N/(A+B+N) equals or exceeds 0.045, and has a crystalline structure.

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