Patent ID: 7635602

Claim:
A simulator of ion implantation, comprising: a database to store a form parameter of an impurity concentration distribution so as to correspond to a condition of ion implantation; and a control unit operably coupled to the database and configured to execute: calculating an integral value φ a /c by integrating an impurity concentration distribution from a thickness d 0 of an amorphous layer to infinite, where the impurity being ion-implanted into a test crystalline substrate under a test condition, and the amorphous layer is formed in the test crystalline substrate by the ion-implantation; acquiring the form parameter of an impurity concentration distribution in a product crystalline substrate that is to be obtained by ion-implanting the impurity under a product condition, by referring to the database; creating a distribution function that approximates the impurity concentration distribution by using the acquired form parameter; and obtaining such a depth d a that an integral value obtained by integrating the distribution function from the depth d a to infinite is equal to the integral value φ a/c , and specifying that a thickness of the amorphous layer to be formed in the product crystalline substrate by ion-implanting the impurity under the product condition is the depth d a .