APPARATUS FOR INSPECTING WAFER EDGE TO REDUCE TIME FOR INSPECTION PROCESS

PURPOSE: An apparatus for inspecting a wafer edge is provided to reduce a time for an inspection process and enhance reliability by inspecting a defect of a wafer edge according to intensity of light reflected from the wafer edge. CONSTITUTION: A chuck(110) is used for supporting a wafer. A pluralit...

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1. Verfasser: KIM, HUI DEOK
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description PURPOSE: An apparatus for inspecting a wafer edge is provided to reduce a time for an inspection process and enhance reliability by inspecting a defect of a wafer edge according to intensity of light reflected from the wafer edge. CONSTITUTION: A chuck(110) is used for supporting a wafer. A plurality of optical sensors(120,124,126) are arranged nearly to an edge part of the wafer. Each optical sensor includes a light emitting unit for irradiating the light on the edge and a receiving part for receiving the light reflected from the edge part. A handling unit is connected to the chuck in order to scan the edge part of the wafer. A central processing unit determines correctly a defect of a wafer edge according to a detecting state of the reflected light.
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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 APPARATUS FOR INSPECTING WAFER EDGE TO REDUCE TIME FOR INSPECTION PROCESS
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