Radiant energy – Inspection of solids or liquids by charged particles – Positive ion probe or microscope type
Reexamination Certificate
2008-01-29
2008-01-29
Berman, Jack I. (Department: 2881)
Radiant energy
Inspection of solids or liquids by charged particles
Positive ion probe or microscope type
C250S491100, C250S492210
Reexamination Certificate
active
10543843
ABSTRACT:
When scanning by an ion beam in advance an area24including a reference hole23formed at a position other than the area to be processed25of a light-shielding film21on a glass substrate22, a secondary ion signal of the same atom as the incident ions injected into the substrate is detected instead of detecting the secondary ion signal of the atoms included in the base film, and the position23of the hole is stored. Then, the area24including the hole formed during the processing is scanned and the secondary ion signal of the same atom as the incident ions is detected to determine the current position26of the hole, the position of the hole obtained by the previous detection and the current position of the hole are compared, and the amount of shift of the position of the hole is determined. This shifted amount is regarded as the drift amount.
REFERENCES:
patent: 6740456 (2004-05-01), Kanamitsu
patent: 7018683 (2006-03-01), Takaoka et al.
patent: 63305358 (1988-12-01), None
patent: 2000021347 (2000-01-01), None
Aita Kazuo
Kozakai Tomokazu
Takaoka Osamu
Adams & Wilks
Berman Jack I.
SII Nano Technology Inc.
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