OXYGEN DIFFUSION EVALUATION METHOD OF OXIDE FILM STACKED BODY
First Claim
1. An oxygen diffusion evaluation method of an oxide film stacked body, comprising the steps of:
- forming a first oxide film over a substrate;
forming a second oxide film over the first oxide film;
measuring a concentration of oxygen isotope in the second oxide film in a depth direction by secondary ion mass spectrometry; and
evaluating diffusion of the oxygen isotope from the first oxide film to the second oxide film,wherein an isotope ratio of oxygen in the first oxide film is different from an isotope ratio of oxygen in the second oxide film.
1 Assignment
0 Petitions
Accused Products
Abstract
Experience shows that, in a material containing oxygen as a main component, an excess or deficiency of trace amounts of oxygen with respect to a stoichiometric composition, or the like affects properties of the material. An oxygen diffusion evaluation method of an oxide film stacked body includes the steps of: measuring a quantitative value of one of oxygen isotopes of a substrate including a first oxide film and a second oxide film which has an existence proportion of an oxygen isotope different from an existence proportion of an oxygen isotope in the first oxide film in a depth direction, by secondary ion mass spectrometry; and evaluating the one of the oxygen isotopes diffused from the first oxide film to the second oxide film.
-
Citations
20 Claims
-
1. An oxygen diffusion evaluation method of an oxide film stacked body, comprising the steps of:
-
forming a first oxide film over a substrate; forming a second oxide film over the first oxide film; measuring a concentration of oxygen isotope in the second oxide film in a depth direction by secondary ion mass spectrometry; and evaluating diffusion of the oxygen isotope from the first oxide film to the second oxide film, wherein an isotope ratio of oxygen in the first oxide film is different from an isotope ratio of oxygen in the second oxide film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An oxygen diffusion evaluation method of an oxide film stacked body, comprising the steps of:
-
forming a first oxide film over a substrate; forming a second oxide film over the first oxide film; measuring a concentration of oxygen isotope in the first oxide film in a depth direction by secondary ion mass spectrometry; and evaluating diffusion of the oxygen isotope from the second oxide film to the first oxide film, wherein an isotope ratio of oxygen in the first oxide film is different from an isotope ratio of oxygen in the second oxide film. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification