Multiblock Principal Component Analysis Based on a Combined Index for Semiconductor Fault Detection and Diagnosis

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Original languageEnglish
Pages (from-to)159-172
Journal / PublicationIEEE Transactions on Semiconductor Manufacturing
Issue number2
Online published8 May 2006
Publication statusPublished - May 2006
Externally publishedYes


The purposes of multivariate statistical process control (MSPC) are to improve process operations by quickly detecting when process abnormalities have occurred and diagnosing the sources of the process abnormalities. In the area of semiconductor manufacturing, increased yield and improved product quality result from reducing the amount of wafers produced under suboptimal operating conditions. This paper presents a complete MSPC application method that combines recent contributions to the field, including multiway principal component analysis (PCA), recursive PCA, fault detection using a combined index, and fault contributions from Hotelling's T2 statistic. In addition, a method for determining multiblock fault contributions to the combined index is introduced. The effectiveness of the system is demonstrated using postlithography metrology data and plasma stripper processing tool data. © 2006 IEEE.

Research Area(s)

  • Combined index, Contribution plots, Fault detection, Fault diagnosis, Multiblock principal component analysis, Recursive principal component analysis