Patent ID: 7800053

Claim:
A method of evaluating an ion irradiation effect comprising: a first irradiation of a sample with a beam of ions, said sample being prepared by alternately and periodically stacking at least a first thin film layer and a second thin film layer, and being for evaluating the displacement of atoms therein through irradiation with a beam of ions; and evaluating an influence of the ions used for the irradiation on atoms making up the sample, wherein the first thin film layer and second thin film layer are comprised of a same chemical element or elements wherein the chemical element or elements of the first thin layer is primarily comprised of a different isotope or isotopes of the chemical element or elements than an isotope or isotopes of the chemical element or elements in the second thin film layer, wherein the step of ion irradiation is one of an ion implantation step and an ion etching step, and the influence of the ions used for the first irradiation on atoms making up the sample is evaluated by means of secondary ion mass spectrometry, which uses a second irradiation of the sample.