Patent ID: 7265427

Claim:
A semiconductor apparatus comprising: a semiconductor substrate; and a function device formed on the semiconductor substrate, wherein the function device comprises a gate structure including a gate insulating film and a gate electrode, the gate insulating film is formed of a high dielectric constant film formed on the semiconductor substrate and an anti-reaction film formed on the high dielectric constant film, and the gate electrode is formed on the anti-reaction film, the high dielectric constant film comprises a film selected from the group consisting of: a film containing at least one of hafnium (Hf) and zirconium (Zr), and silicon (Si) and oxygen (O), and a film containing at least one of Hf and Zr, and Si, O, and nitrogen (N), and the anti-reaction film comprises a film selected from the group consisting of: a film containing Si, O, and Hf, where an amount of Hf is less than 1 atom %, a film containing Si, O, Hf, and Zr, where an amount of Hf and Zr is less than 1 atom %, a film containing Si, O, and N, where an amount of N is less than 20 atom %, a film containing Si, O, N, and Hf, where an amount of N is less than 20 atom % and an amount of Hf is less than 1 atom %, a film containing Si, O, N, and Zr, where an amount of N is less than 20 atom % and an amount of Zr is less than 1 atom %, and a film containing Si, O, N, Hf, and Zr, where an amount of N is less than 20 atom % and an amount of Hf and Zr is less than 1 atom %.