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WHITE LIGHT SCANNING TYPE WAFER THICKNESS MEASURING APPARATUS CAPABLE OF OPTIMIZING THE AMOUNT OF SCATTERING OR REFLECTED LIGHTS ACCORDING TO THE STATE OF A WAFER
WHITE LIGHT SCANNING TYPE WAFER THICKNESS MEASURING APPARATUS CAPABLE OF OPTIMIZING THE AMOUNT OF SCATTERING OR REFLECTED LIGHTS ACCORDING TO THE STATE OF A WAFER
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机译:白光扫描型晶圆厚度测量装置,能够根据晶圆状态优化散射光或反射光的数量
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摘要
PURPOSE: A white light scanning type wafer thickness measuring apparatus is provided to obtain an improved image by reducing an error caused by light refraction according to the position of a wafer.;CONSTITUTION: A white light scanning type wafer thickness measuring apparatus comprises a light source unit(20) which irradiates white light to a wafer, a camera(30) which receives the light reflected off the wafer, and a thickness calculation unit(50) which measures the thickness of the wafer by taking signals of specific wave lengths from image signals transmitted from the camera.;COPYRIGHT KIPO 2012
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