Method and apparatus for charged particle beam inspection

Details Method and apparatus for charged particle beam inspection Method and apparatus for charged particle beam inspection

2009-03-09

2011-11-22

Johnston, Phillip A (Department: 2881)

Radiant energy

Inspection of solids or liquids by charged particles

Methods

C250S492100, C250S492300

Reexamination Certificate

active

08063363

ABSTRACT:
A method, apparatus and computer readable medium for charged particle beam inspection of a sample comprising at least one sampling region and at least one skip region is disclosed. The method, apparatus and computer readable medium comprise receiving an imaging recipe which at least comprises information of the area of the sampling and skip regions; calculating a default stage speed according to the imaging recipe; calculating an alternative stage speed at least according to the default stage speed, the sampling region area information, and the skip region area information; calculating at least one imaging scan compensation offset at least according to the alternative stage speed; and inspecting the sample at the alternative stage speed while adjusting the motion of the charged particle beam according to the imaging scan compensation offsets, such that the charged particle beam tightly follows the motion of the stage and images only the sampling regions on the sample.

REFERENCES:
patent: 5578821 (1996-11-01), Meisberger et al.
patent: 7095022 (2006-08-01), Nakasuji et al.
patent: 7248353 (2007-07-01), Kimba et al.
patent: 7468506 (2008-12-01), Rogers et al.

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