Abstract
In this study, we propose new fusion technology to overcome the limitations of the current printing process for printed electronics. The combinative slot-die coating and laser direct writing on a roll-to-roll (R2R) basis was studied and applied to the fabrication of piezoresistive strain gauges. Piezoresistive sensors were fabricated for the first time by this developed fusion technology. A parametric study was performed for the R2R process, followed by a comparison of the fabricated functional devices with commercial products, which confirmed a 40% increase in the gauge factor of the fabricated sensors over the commercial product. The combinative manufacturing process for functional device fabrication will open a new chapter in the future of printed electronics due to its large area capacity at low cost.
Highlights
Conventional printing technologies are used for mass production of products, such as newspapers and labels
We propose new fusion technology to overcome the limitations of the current printing process for printed electronics
Piezoresistive sensors were fabricated for the first time by this developed fusion technology
Summary
Conventional printing technologies are used for mass production of products, such as newspapers and labels. Printed electronics is one of the most important technologies in electronics and is used in applications including displays, photovoltaics, logic and memory devices, flexible printed circuit boards, RFID, and sensors This new approach to the technology may allow for large-area, low-cost fabrication of devices that are foldable, rollable, transparent, stretchable, and wearable. Previous studies were conducted for OPV fabrication that included slot-die coated organic multilayers such as P3HT:PCBM, PEDOT:PSS, and ZnO [3,4,5]. A new approach is proposed for printed electronics that combines roll-to-roll slot-die coating and LDW processes. The purpose of the method is to expand the onedimensional patterning in slot-die coating to two-dimensions, while fully exploiting the advantages of the digital process, no mask, noncontact, and low cost of LDW. The piezoresistive strain gauges were fabricated and evaluated to demonstrate the versatility of the proposed manufacturing scheme
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