Patent ID: 8063363
Filing Date: 2011-11-22
Classification: H01J

Abstract:
1. A method for imaging and inspecting a sample using a charged particle beam, said sample comprising at least one sampling region and at least one skip region thereon, said charged particle beam scanning said sample in scan lines along a first direction, said sample being secured on a stage continuously moving along a second direction, the method comprising: receiving an imaging recipe at least comprising a sampling region area information and skip region area information; calculating a default stage speed according to received said imaging recipe; calculating an alternative stage speed according to calculated said default stage speed, said sampling region area information, and said skip region area information, wherein said alternative stage speed is faster than said default stage speed; and said alternative stage speed is defined as follows; V where; AC=area of the sampling region; and AB=area of the skip region; calculating at least one imaging scan compensation offset according to calculated said alternative stage speed; and inspecting said sample at said alternative stage speed while adjusting the motion of said charged particle beam according to calculated said imaging scan compensation offsets, such that said charged particle beam tightly follows the motion of said stage and scans and images only said sampling regions on said sample.