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 |
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頁面 | 190-193 |
頁數 | 4 |
出版狀態 | 已出版 - 2006 |
對外發佈 | 是 |
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 2006 → 23 02 2006 |
Conference
Conference | 11th International Chemical-Mechanical Planarization for ULSI Multilevel Interconnection Conference, CMP-MIC 2006 |
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國家/地區 | 美國 |
城市 | Fremont, CA |
期間 | 21/02/06 → 23/02/06 |