Patent ID: 6665071
Filing Date: 2003-12-16
Classification: G01N

Abstract:
A method for evaluating characteristics of the ion implantation in a shallow junction formed on a semiconductor sample comprising the steps of:a) obtaining a first measurement in response to periodic excitation of the sample and generating first output signals in response thereto, said first measurement being selected from the group consisting of: i) monitoring the modulated changes in index of refraction of the sample; and ii) monitoring the modulated changes in the deformation of the sample; b) obtaining a second spectroscopic measurement and generating second output signals in response thereto, said second measurement being selected from the group consisting of: i) spectroscopic reflectometry; and ii) spectroscopic ellipsometry; and c) determining the energy and dose of the implant used to create the shallow junction using an algorithm which simultaneously regresses data corresponding to a combination of both the first and second output signals.