Abstract
Recently, the rapid prototyping process was actively studied in industry and academia. The rapid prototyping process has various advantages such as a rapid processing speed, high processing freedom, high efficiency, and eco-friendly process compared to the conventional etching process. However, in general, it is difficult to directly apply to the fabrication of electric devices, as the molding made by the rapid prototyping process is usually a nonconductive polymer. Even when a conductive material is used for the rapid prototyping process, the molding is made by a single material; thus, its application is limited. In this study, we introduce a simple alternative process for the fabrication of a soft sensor using laser processing techniques. The UV laser curing of polymer resin and laser welding of nanowires are conducted and analyzed. Through the laser processing techniques, we can easily fabricate soft sensors, which is considered an alternative 3D printing process for the fabrication of soft sensors.
Highlights
In the fourth industrial era, the importance of sensors that provide data for artificial intelligence in the Internet of Things (IoT) has progressively increased
As the laser curing process and laser-induced nano welding (LINW) process are conducted in one laser system, and the spray coating process can be applied to the arbitrarily shaped structure, we can fabricate an Ag NW-based soft sensor unlike the conventional rapid prototyping (RP) process using laser processing techniques with the limitation of the material used
The laser power is adjusted by combining a polarizedsplitter beam (PBS) and half-wave plate (HWP)
Summary
In the fourth industrial era, the importance of sensors that provide data for artificial intelligence in the Internet of Things (IoT) has progressively increased. In the case of the photo-curable resin, continuous liquid interface printing (CLIP) [14] and the two-photon polymerization (2PP) [18] process are famous laser processing techniques in the RP process These conventional RP processes using laser processing techniques have various advantages such as a fine resolution, complex structure, and high-accuracy structure. Conventional RP processes using laser processing techniques are still not suitable for the fabrication of soft sensors due to the limitation of materials used, where it is difficult to pattern the polymer body and metal electrode simultaneously. As the laser curing process and LINW process are conducted in one laser system, and the spray coating process can be applied to the arbitrarily shaped structure, we can fabricate an Ag NW-based soft sensor unlike the conventional RP process using laser processing techniques with the limitation of the material used
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