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Journal of Zhejiang University SCIENCE C 2013 Vol.14 No.3 P.222-234

http://doi.org/10.1631/jzus.C1200297


Novel serpentine structure design method considering confidence level and estimation precision


Author(s):  Li-sheng Chen, Xiao-hua Luo, Jiao-jiao Zhu, Fan-chao Jie, Xiao-lang Yan

Affiliation(s):  Institute of VLSI Design, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   luoxh@vlsi.zju.edu.cn

Key Words:  Poisson yield model, Serpentine test structure, Critical area, Average defect density, Confidence level, Estimation precision


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Li-sheng Chen, Xiao-hua Luo, Jiao-jiao Zhu, Fan-chao Jie, Xiao-lang Yan. Novel serpentine structure design method considering confidence level and estimation precision[J]. Journal of Zhejiang University Science C, 2013, 14(3): 222-234.

@article{title="Novel serpentine structure design method considering confidence level and estimation precision",
author="Li-sheng Chen, Xiao-hua Luo, Jiao-jiao Zhu, Fan-chao Jie, Xiao-lang Yan",
journal="Journal of Zhejiang University Science C",
volume="14",
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pages="222-234",
year="2013",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.C1200297"
}

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%T Novel serpentine structure design method considering confidence level and estimation precision
%A Li-sheng Chen
%A Xiao-hua Luo
%A Jiao-jiao Zhu
%A Fan-chao Jie
%A Xiao-lang Yan
%J Journal of Zhejiang University SCIENCE C
%V 14
%N 3
%P 222-234
%@ 1869-1951
%D 2013
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.C1200297

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T1 - Novel serpentine structure design method considering confidence level and estimation precision
A1 - Li-sheng Chen
A1 - Xiao-hua Luo
A1 - Jiao-jiao Zhu
A1 - Fan-chao Jie
A1 - Xiao-lang Yan
J0 - Journal of Zhejiang University Science C
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SP - 222
EP - 234
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Y1 - 2013
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.C1200297


Abstract: 
Due to the importance of metal layers in the product yield, serpentine test structures are usually fabricated on test chips to extract parameters for yield prediction. In this paper, the confidence level and estimation precision of the average defect density on metal layers are investigated to minimize the randomness of experimental results and make the measured parameters more convincing. On the basis of the poisson yield model, the method to determine the total area of all serpentine test structures is obtained using the law of large numbers and the Lindeberg-Levy theorem. Furthermore, the method to determine an adequate area of each serpentine test structure is proposed under a specific requirement of confidence level and estimation precision. The results of Monte Carlo simulation show that the proposed method is consistent with theoretical analyses. It is also revealed by wafer experimental results that the method of designing serpentine test structure proposed in this paper has better performance.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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