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이종 데이터 학습 및 다중 시점 예측을 이용한 생산 수율 예측 기법
김경휘(Kyung Hwi Kim),손동연(Dong Yeon Son),임채환(Chehwan Lim),추호석(Ho Seok Choo),김재협(Jae Hyup Kim) 대한전자공학회 2024 대한전자공학회 학술대회 Vol.2024 No.6
In this paper, we propose a yield prediction method using design data and processing data. Key factors that affect the yield include the products unique characteristics (e.g. design) and their impact on the manufacturing process. Because the data of the two factors are static data and dynamic (time series) data, respectively, multi-modal learning is necessary. Additionally, it is an environment in which perfect control cannot be achieved during the production process, and if production continues, the yield will inevitably show average and variance. Therefore, the yield prediction problem should not be considered as a single numerical prediction, but rather as a problem of predicting production results at various points in time (i.e. multi-horizon) when production continues in the future, and using these to predict distribution. (i.e. multi-horizon forecasting) So, the proposed method was composed of learning multi-modal data and multi-horizon forecasting, and ultimately predict the distribution of the yield.
황경환 ( Kyong Hwan Hwang ),김종민 ( Jong Min Kim ),정대룡 ( Dae Ryong Jung ),김천중 ( Chun Joong Kim ),문태호 ( Tae Ho Moon ),손동연 ( Dong Yeon Son ),박병우 ( Byung Woo Park ) 대한금속재료학회 ( 구 대한금속학회 ) 2007 ELECTRONIC MATERIALS LETTERS Vol.3 No.4
To understand the photoluminescence (PL) mechanisms of nanophosphors, various experiments were conducted. The SnO2:Eu3+ nanoparticles were synthesized and calcined at various temperatures. The increase of the PL intensities with the increasing calcination temperature was due to the removal of the hydroxyl groups, and to the decrease of the surface area caused by the growth of the nanoparticles. Additionally, Mn-doped zinc sulfide monodispersed-nanoparticles were synthesized. The influence of Mn doping concentration was investigated with the decrease of crystallinity and capping. The increased crystallinity and removal of water/organic capping were suggested for the reasons of increased PL property.