Computer-based method and apparatus for inspecting a wafer, computer-based method and apparatus for adjusting an auto-focus in a wafer inspection system, and phase filter and method of forming the same

Computer-based method and apparatus for inspecting a wafer, computer-based method and apparatus for adjusting an auto-focus in a wafer inspection system, and phase filter and method of forming the same

A computer-based apparatus for adjusting an auto-focus in a wafer inspection system, including: a wafer adjustment system; and an electronic feedback loop system configured to compare an intensity of a first light beam rotating in a first spiral about a first central axis, and when the intensity is...

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Hauptverfasser: DANEN, ROBERT, HAURYLAU, MIKHAIL, KOLCHIN, PAVEL
Format: Patent
Sprache:chi ; eng
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BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
SEMICONDUCTOR DEVICES
TESTING
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creator DANEN, ROBERT
HAURYLAU, MIKHAIL
KOLCHIN, PAVEL
description A computer-based apparatus for adjusting an auto-focus in a wafer inspection system, including: a wafer adjustment system; and an electronic feedback loop system configured to compare an intensity of a first light beam rotating in a first spiral about a first central axis, and when the intensity is less than a preselected threshold, adjust, using the wafer adjustment system, a position of the wafer until the intensity reaches the preselected threshold.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
SEMICONDUCTOR DEVICES
TESTING
title Computer-based method and apparatus for inspecting a wafer, computer-based method and apparatus for adjusting an auto-focus in a wafer inspection system, and phase filter and method of forming the same
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