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Open source slot die
An open source 3-D printer to both fabricate the slot die and then to functionalize a 3-D slot die printing system.3D printer parts and enhancements
A free software license that requires that all work based on this must also be free software as in freely remixable and sharable by anyone under the same license but may be used commercially.
L.Y. Beeker, Adam M. Pringle, Joshua M. Pearce. Open-source parametric 3-D printed slot die system for thin film semiconductor processing. Additive Manufacturing 20 (2018) 90–100. https://doi.org/10.1016/j.addma.2017.12.004 open access https://www.academia.edu/35667969/Open-source_Parametric_3-D_Printed_Slot_Die_System_for_Thin_Film_Semiconductor_Processing
Franklin firmware: http://www.appropedia.org/Franklin
Open-source syringe pump: http://www.appropedia.org/Open-source_syringe_pump
Prusa conversion - follow same procedure as Open-source Wax RepRap 3-D Printer for Rapid Prototyping Paper-Based Microfluidics: http://www.appropedia.org/Open-source_Wax_RepRap_3-D_Printer_for_Rapid_Prototyping_Paper-Based_Microfluidics
with the new x carriage provided in this paper. https://osf.io/m2zqk/
Slot die coating is growing in popularity because it is a low operational cost and easily scaled processing technique for depositing thin and uniform films rapidly, while minimizing material waste. The complex inner geometry of conventional slot dies require expensive machining that limits accessibility and experimentation. In order to overcome these issues this study follows an open hardware approach, which uses an open source 3-D printer to both fabricate the slot die and then to functionalize a 3-D slot die printing system. Polymer materials are tested and selected for compatibility with common solvents and used to fabricate a custom slot die head. This slot die is then integrated into a 3-D printer augmented with a syringe pump to form an additive manufacturing platform for thin film semiconductor devices. The full design of the slot die system is disclosed here using an open source license including software and operational protocols. This study demonstrates that functional lab-grade slot dies may be 3-D printed using low-cost open source hardware methods A case study using NiO2 found an RMS value 0.486 nm, thickness of 17–49 nm, and a maximum optical transmission of 99.1%, which shows this additive manufacturing approach to slot die depositions as well of fabrication is capable of producing viable layers of advanced electronic materials. Using this method, a cost savings of over 17,000% was obtained when compared to commercial slot die systems for laboratories.
Materials and methods
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