Distortion Correction Method and Electron Microscope
First Claim
1. A method of distortion correction for use in a charged particle beam system including an illumination system having a built-in aberration corrector which contains a plurality of multipole elements and a transfer lens system disposed between the multipole elements to correct distortion in a shadow of an aperture of the illumination system, said method comprising:
- varying excitations of the transfer lens system to correct the distortion in the shadow of the aperture.
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Accused Products
Abstract
There is provided a method which is for use in a charged particle beam system including an illumination system equipped with an aberration corrector having a plurality of stages of multipole elements and a transfer lens system disposed between the multipole elements, the method being capable of correcting distortion in a shadow of an aperture of the illumination system. The method involves varying excitations of the transfer lens system to correct distortion in the shadow of the aperture of the illumination system.
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Citations
13 Claims
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1. A method of distortion correction for use in a charged particle beam system including an illumination system having a built-in aberration corrector which contains a plurality of multipole elements and a transfer lens system disposed between the multipole elements to correct distortion in a shadow of an aperture of the illumination system, said method comprising:
varying excitations of the transfer lens system to correct the distortion in the shadow of the aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A charged particle beam system comprising:
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an illumination system including an aberration corrector and an aperture, the aberration corrector containing a plural stages of multipole elements and a transfer lens system disposed between the multipole elements; a distortion measuring section for measuring distortion in a shadow of the aperture; and a controller for controlling the aberration corrector, wherein the controller provides control based on a result of measurement of the distortion in the shadow of the aperture to vary excitations of the transfer lens system. - View Dependent Claims (10, 11, 12, 13)
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Specification