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快速热处理对直拉硅单晶在模拟CMOS热处理工艺时氧沉淀的影响
Effect of Rapid Thermal Processing on Oxygen Precipitation in Czochralski Silicon Subjected to Simulating CMOS Thermal Processing
【摘要】 本文研究了快速热处理工艺(RTP)在模拟的CMOS热处理工艺中对直拉硅单晶中氧沉淀和洁净区(DZ)的影响。研究表明:在模拟的CMOS热处理工艺之前,应用快速热处理(1250℃,50s)代替常规炉处理(1200℃,2h)消除直拉硅单晶热历史,可以更有效地消融原生氧沉淀。经过CMOS热处理工艺后,硅片的表面存在宽度约为20μm的洁净区(DZ),同时其体内有较高密度的体缺陷(BMD)。
【Abstract】 The effect of rapid thermal processing(RTP) on oxygen precipitates profile and denude zone(DZ) in Czochralski(CZ) silicon wafer during simulating CMOS processing is investigated.RTP(1250℃,50s) is more effective than that of conventional thermal anneal(1200℃,2h) for dissolving grown-in oxygen precipitation in CZ-Si.Moreover,perfect DZ with a width of about 20μm was formed in the near-surface region,whereas high-density uniformity-sized oxygen precipitation was formed in the bulk region after the thermal processing of CMOS.
【Key words】 Czochralski silicon; oxygen precipitates; RTP; processing of CMOS;
- 【文献出处】 材料科学与工程学报 ,Journal of Materials Science and Engineering , 编辑部邮箱 ,2006年05期
- 【分类号】TN386.1
- 【被引频次】2
- 【下载频次】151