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5 April 2007 Study on micro-bubble defect induced by RRC coating
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RRC (Reducing resist consumption) coating is widely used to reduce photo resist consumption. By using solvent to pre-wet the wafer surface, photo resist can be coated on wafer easier than normal coating method. But it also can be the source of defects. In this study, we found that RRC solvent will induce micro-bubble and cause defects. Different methods had been tried to solve this kind of micro-bubble defects. Results showed that micro-bubble defects can be found when the wafer is static during RRC solvent dispense. And the defect map was a ring shape. The diameter of the rings depended on the RRC solvent dispense amount. Non micro-bubble defect was found, if wafer was spinning during RRC solvent dispense.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yu-Huan Liu, Wen-Shiang Liao, Hsin-Hung Lin, Chin-Jung Chen, and C. C. Huang "Study on micro-bubble defect induced by RRC coating", Proc. SPIE 6518, Metrology, Inspection, and Process Control for Microlithography XXI, 65184L (5 April 2007);

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