Invention Application
WO2004097890A2 OBJECTIVE LENS ARRANGEMENT FOR USE IN A CHARGED PARTICLE BEAM COLUMN 审中-公开
用于带电粒子束柱的目标透镜布置

OBJECTIVE LENS ARRANGEMENT FOR USE IN A CHARGED PARTICLE BEAM COLUMN
Abstract:
An objective lens arrangement is presented for mounting in a charged particle beam column adjacent to an anode tube that defines a beam drift space for a charged particle beam propagating towards a sample. The lens arrangement comprises a magnetic lens and an electrostatic lens, wherein the eletrostatic lens includes upper and lower electrodes arranged in a spaced-apart coaxial relationship along an optical axis of the lens arrangement.
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