Patent ID: 7186577
Filing Date: 2007-03-06
Classification: G01N

Abstract:
1. A method of monitoring a density profile of impurities, the method comprising: presetting a monitoring position of a thin layer coated on a substrate, the density profile of impurities being monitored from the monitoring position in a direction of thickness of the thin layer; moving an exposer for exposing a local area of the thin layer to the monitoring position; exposing the local area of the thin layer along the direction of thickness of the thin layer; forming a shape profile of the exposed local area of the thin layer; and monitoring the density profile of impurities by determining a density of impurities in accordance with the shape profile, wherein the exposer is a device for performing an etching process, the exposer delivering an etchant to the local area, and exposing the local area includes delivering the etchant to the local area using the exposer, the etchant flowing through a tip of the exposer, the tip having a diameter of less than or equal to several micrometers.