Empirical model of Si3N4 erosion in the direct STI CMP process for advanced nanometer generation

Chi Hsiang Kuo, Shing Yih Shih, Chien Mao Liao, Chang Rang Wu, Jeng Ping Lin, Pei Ing Lee

研究成果: 會議稿件的類型論文同行評審

摘要

The STI CMP process is inherent in the pattern dependence. As the chip size continues to shrink, the issue of Si3N4 erosion in the STI CMP process leading to worse STI step height non-uniformity and device detraction will become a significant challenge. In this paper, empirical models of Si3N4 erosion, derived from the studies of a nanometer feature CMP test mask with two kinds of ceria-based slurries, have been proposed to investigate the limitation of the STI CMP process. Unless the effect of active area (AA) pattern density, Si3N4 erosion will rise abruptly as AA width shrinks to nanometer nodes, under 50% AA pattern density especially. Using empirical models, Si3N4 erosion can be predicted for nanometer generation and beyond in advance.

原文英語
頁面190-193
頁數4
出版狀態已出版 - 2006
對外發佈
事件11th International Chemical-Mechanical Planarization for ULSI Multilevel Interconnection Conference, CMP-MIC 2006 - Fremont, CA, 美國
持續時間: 21 02 200623 02 2006

Conference

Conference11th International Chemical-Mechanical Planarization for ULSI Multilevel Interconnection Conference, CMP-MIC 2006
國家/地區美國
城市Fremont, CA
期間21/02/0623/02/06

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