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Measurement of Wafer Focus by Grating Shearing Interferometry

A method applied for improving the measurement precision and efficiency of wafer focusing in an optical lithography instrument (OLI) is introduced. Based on grating shearing interferometry, the defocus and tilt of the wafer are measured by testing the phase difference in the interference pattern. To...

Whakaahuatanga katoa

I tiakina i:
Ngā taipitopito rārangi puna kōrero
Ngā kaituhi matua: Jian Wang, Song Hu, Xianchang Zhu
Hōputu: Artigo
Reo:Inglês
I whakaputaina: MDPI AG 2020-10-01
Rangatū:Applied Sciences
Ngā marau:
Urunga tuihono:https://www.mdpi.com/2076-3417/10/21/7467
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