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E-beam apparatus

專利號
US10867770B2
公開日期
2020-12-15
申請人
ASML Netherlands B.V.(NL Veldhoven)
發(fā)明人
Peter Paul Hempenius; Sven Antoin Johan Hol; Maarten Frans Janus Kremers; Henricus Martinus Johannes Van De Groes; Niels Johannes Maria Bosch; Marcel Koenraad Marie Baggen
IPC分類
H01J37/20; H01J37/09; H01J37/317
技術領域
shield,stroke,beam,electron,magnetic,stage,optics,object,table,stray
地域: AH Veldhoven

摘要

An e-beam apparatus is disclosed, the tool comprising an electron optics system configured to project an e-beam onto an object, an object table to hold the object, and a positioning device configured to move the object table relative to the electron optics system. The positioning device comprises a short stroke stage configured to move the object table relative to the electron optics system and a long stroke stage configured to move the short stroke stage relative to the electron optics system. The e-beam apparatus further comprises a magnetic shield to shield the electron optics system from a magnetic disturbance generated by the positioning device. The magnetic shield may be arranged between the positioning device and the electron optics system.

說明書

The e-beam inspection tool may comprise s high voltage plate, such as a stationary high voltage plate connected to the vacuum chamber such as the plates 650 in FIG. 6, or a high voltage plate provided in the positioning device 610. In order to reduce an additional volume that would be required for the magnetic shield, the magnetic shield may be combined with the high voltage plate of the e-beam inspection tool. The high voltage plate and the magnetic shield may form separate layers connected to each other, whereby each layer provides its intended function. Alternatively, the high voltage plate and the magnetic shielding may be integrated, for example by providing high voltage plate using a mu-metal or similar type of material.

權利要求

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