Patent ID: 6950196
Filing Date: 2005-09-27
Classification: G01N,G03F,H01J,H01L,Y10T

Abstract:
1. A system configured to determine at least two properties of a specimen during use, comprising: a stage configured to support the specimen during use; two or more measurement devices coupled to the stage, wherein the two or more measurement devices are configured to generate one or more output signals in response to one or more of the at least two properties of the specimen during use; and a processor coupled to the two or more measurement devices, wherein the processor is configured to determine the at least two properties of the specimen from the one or more output signals during use, wherein the at least two properties comprise a thickness of a structure on the specimen and at least one additional property of the specimen, and wherein the two or more measurement devices are selected to provide the one or more output signals for different ranges of the thickness of the structure.