A Bayesian ranking scheme for supporting cost-effectiveyield diagnosis services

Authors:
Chih-Min Fan;Yun-Pei Lu
Affiliations:
Industrial Engineering and Management Department, Yuan Ze University, Taiwan, R.O.C.;Industrial Engineering and Management Department, Yuan Ze University, Taiwan, R.O.C.
Venue:
CASE'09 Proceedings of the fifth annual IEEE international conference on Automation science and engineering
Year:
2009

Citing 3
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Abstract

A Bayesian Ranking Scheme is proposed for the reliable diagnosis of various yield-loss factors induced in semiconductor manufacturing. The aim is to cope with three problems: (FICV) false identification due to confounding variables, (FISV) false identification due to suppressor variables, and (MISC) miss identification due to severe multicollinearity. The proposed scheme reuses both the results from knowledge-based and data-driven inference tools as input data, where the former resembles expert's knowledge on diagnosing pre-known yield-loss factors while the latter serves for exploring new yield-loss factors. Two successive stages with specific designs for yield diagnosis services are addressed: Bayesian Variable Selection for reliable model construction and Relative Importance Assessment for facilitating interpretations on model parameters. A simulation example is designed to demonstrate the usefulness of Bayesian Ranking Scheme on solving FICV, FISV and MISC problems.