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http://dx.doi.org/10.5207/JIEIE.2008.22.6.148

A Study on the Control Algorithm for the 300[mm] Wafer Edge Exposure of ArF Type using A Linear CCD Sensor  

Park, Hong-Lae (건국대학교 벤처전문기술학과)
Lee, Cheol-Gyu (건국대학교 대학원 벤처전문기술학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.22, no.6, 2008 , pp. 148-155 More about this Journal
Abstract
This study presents a process control of the wafer edge exposure (WEE) used in 300[mm] wafer environment. WEE, as a key module of the overall track system (coater and developer) for making patterns on wafer, is a system to expose the UV-ray on the wafer to remove a photo resist around edge of the wafer. It can measure, memorize and control the distance and angles from wafer center to edge. Recently in the 300[mm] semiconductor fabrication, the track system strongly requires that WEE station has a controller with high throughput and accuracy to increase process efficiency. We have designed and developed the controller, and present here a WEE control algorithm and experimental results.
Keywords
300[mm] Wafer; Wafer Edge Exposure (WEE); Control Algorithm;
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