Patent ID: 7884936

Claim:
A method of inspecting or measuring one or more semiconductor targets, comprising: directing an incident beam towards a first target as the first target substantially, continuously moves such that the incident beam remains directed at such first target during a first time period in which the first target substantially, continuously moves between a first position and a second position such that a substantially same incident beam angle for the first target is maintained during the first time period; detecting an output beam scattered from the first target, in response to the incident beam being directed towards the first target during the first time period in which the first target substantially, continuously moves between the first and second positions, such that information is obtained from the detected output beam during the first time period, wherein the first time period is selected so that the information that is collected from the detected output beam during such first time period can be used to determine a characteristic of the first target; and determining the characteristic of the first target based on the detected output beam.