Patent ID: 6782337
Filing Date: 2004-08-24
Classification: G01N,G03F,H01J,H01L

Abstract:
A system configured to determine at least two properties of a specimen during use, comprising:a stage configured to support the specimen during use; a measurement device coupled to the stage, comprising: an illumination system configured to direct energy toward a surface of the specimen during use; and a detection system coupled to the illumination system and configured to detect energy propagating from the surface of the specimen during use, wherein the measurement device is configured to generate one or more output signals in response to the detected energy during use; and a processor coupled to the measurement device and configured to determine a first property and a second property of the specimen from the one or more output signals during use, wherein the first property comprises a critical dimension of the specimen, wherein the second property comprises a presence of defects on the specimen, and wherein the defects comprise defects on a bottom surface of the specimen.