Vitronic - Richard Moreth

15,52 14,15 4,54 3,38 3,39 4,55 15,57 6,51 3,20 7,50 HOW TO USE AUTOMATED FEEDBACK FOR COST REDUCTION IN CELL FACTORIES? VITRONIC – A GLOBAL LEADER IN MACHINE VISION VITRONIC 2 • Privately held company (founded 1984, owner managed) • Headquartered in Wiesbaden, Germany • Subsidiaries on four continents • Global partner and service network • Total revenue in 2017: €172 million • 1000 employees • Products for Photovoltaic, Automotive, Healthcare, Logistics, and Traffic industries • 2.000 PV systems for 130 customers company founder Dr.-Ing. N. Stein AOI IN TESTER / SORTER 3 SORTING INTO COLOR CLASSES AND OPTICAL QUALITIES IS IMPLEMENTED ALMOST EVERYWHERE Wafer inspection Texture inspection Coating inspection Print inspection Inspection in cell tester/ sorter GOOD ENOUGH? AOI IN CELL TESTER / SORTER Lack of experience in algorithmic differentiation of effects relevant and non-relevant effects are not reliably differentiated AOI IN CELL TESTER / SORTER Non-quantifiable qualification by artificial neural network Slip of new, not sufficiently taught defects AOI IN CELL TESTER / SORTER HIGHEST YIELD AND FAST ROI 7 ONLY VERY SMALL UNCERTAINTY RANGES ENABLES FAST ROI accepted Non acceptable defect Small uncertainty range Wide uncertainty range accepted accepted Non acceptable defect Non acceptable defect state of the art AOI Risk for underkill and overkill simple AOI PRODUCE QUALITY, NOT SORT IT Inline process control after every step of production INLINE AOI 9 QUALITY-TUNED PRODUCTION EQUALS EFFICIENCY Wafer inspection Texture inspection Coating inspection Print inspection Inspection in cell tester/ sorter INLINE AOI INLINE AOI 10 Inline process control after every production step ensures • early detection of drifts of quality relevant parameters • reduction of scrap and low quality cells • predictive maintenance, „man-free“ production • possibility of short feedback loop, that production parameters can be kept in a narrow tolerance range • Leads to higher yield with higher quality! Analysis of the trend development of e.g. • finger interruptions • finger widths • grid deviations • spots, bulges POSSIBILITIES OF POST PRINT AOI INLINE AOI / HEATMAP 11 Yield improvement heatmap POST PRINT AOI 12 Post Print AOI eliminates defect cells before entering curing process HOW AOI AVOIDS PRODUCTION LOSSES IN CURING PROCESS FOR LIGHT INDUCED DEGRADATION ? EL image of an installation showing LID effects Source: pv magazine, authorJay Lin, published 2018 Printing St ac kin g Firing Tes ter / Sorter LID curing process, only for high efficiency cells AOI Post Print AOI ensures only high grade cells to reach LID curing process LID Curing Un - stac kin g SYSTEM NETWORKS AVOID ERRORS SYSTEM NETWORKS 13 Transparency of processes • Quick integration of changes in processes • Same calibration method everywhere • Same recipe parameters • Central recipe management across all locations (identical quality, consistent data) • Central performance and yield control • Relevant data accessible throughout the fabs – big data – Industry 4.0 OVERALL EQUIPMENT EFFECTIVENESS 14 OEE IS THE BASIS FOR PROCESS IMPROVEMENTS OVERALL EQUIPMENT EFFECTIVENESS OVERALL EQUIPMENT EFFECTIVENESS 15 Today the output of the total number of cells/24h is between 5-20% below target (max. throughput of equipment). DOWNTIME REDUCTION 16 no maintenance REDUCTION OF DOWNTIME REDUCTION OF MENCOUNT reactive maintenance preventive maintenance (scheduled) predictive maintenance Upt im e ( mach ine per fo rman ce ) AOI AOI CONTACT INFORMATION 17 WOULD YOU LIKE MORE INFORMATION? VITRONIC GmbH Hasengartenstr. 14 65189 Wiesbaden Germany Richard Moreth Phone: +49 611 7152 145 richard.moreth@vitronic.com Vice-Chairman of SolarUnited (IPVEA) Board member of VDMA PV ETIP-PV Steering Committee www.vitronic.com