Semiconductor device manufacturing: process – Including control responsive to sensed condition – Optical characteristic sensed
Reexamination Certificate
2008-07-15
2008-07-15
Lebentritt, Michael S. (Department: 2812)
Semiconductor device manufacturing: process
Including control responsive to sensed condition
Optical characteristic sensed
Reexamination Certificate
active
07399647
ABSTRACT:
Bright and dark field imaging operations in an optical inspection system occur along substantially the same optical path using the same light source by producing either a circular or an annular laser beam. Multiple beam splitting is achieved through the use of a diffractive optical element having uniform diffraction efficiency. A confocal arrangement for bright field and dark field imaging can be applied with multiple beam scanning for suppressing the signal from under-layers. A scan direction not perpendicular to the direction of movement of a target provides for improved die-to-die comparisons.
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Applied Materials Inc.
Lebentritt Michael S.
Stevenson Andre′
Sughre Mion, PLLC
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