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A Highly Sensitive Determination of Bulk Cu and Ni in Heavily Boron-doped Silicon Wafers
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  • A Highly Sensitive Determination of Bulk Cu and Ni in Heavily Boron-doped Silicon Wafers
  • A Highly Sensitive Determination of Bulk Cu and Ni in Heavily Boron-doped Silicon Wafers
저자명
Lee. Sung-Wook,Lee. Sang-Hak,Kim. Young-Hoon,Kim. Ja-Young,Hwang. Don-Ha,Lee. Bo-Young
간행물명
Bulletin of the Korean Chemical Society
권/호정보
2011년|32권 7호|pp.2227-2232 (6 pages)
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대한화학회
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정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The new metrology, Advanced Poly-silicon Ultra-Trace Profiling (APUTP), was developed for measuring bulk Cu and Ni in heavily boron-doped silicon wafers. A Ni recovery yield of 98.8% and a Cu recovery yield of 96.0% were achieved by optimizing the vapor phase etching and the wafer surface scanning conditions, following capture of Cu and Ni by the poly-silicon layer. A lower limit of detection (LOD) than previous techniques could be achieved using the mixture vapor etching method. This method can be used to indicate the amount of Cu and Ni resulting from bulk contamination in heavily boron-doped silicon wafers during wafer manufacturing. It was found that a higher degree of bulk Ni contamination arose during alkaline etching of heavily boron-doped silicon wafers compared with lightly boron-doped silicon wafers. In addition, it was proven that bulk Cu contamination was easily introduced in the heavily boron-doped silicon wafer by polishing the wafer with a slurry containing Cu in the presence of amine additives.