4:00 PM - 6:00 PM
[22p-P13-2] Fabrication of Printed Wiring on Non-woven Fabric and Application to Touch Sensor
Keywords:Printed electronics
Smart textiles having electrical wirings on fabrics are desired to contribute as one of next-generation flexible electronics including human-machine interface devices, sensors, and power generators. For the realization of these devices, fabrication techniques of fine wiring on fabrics are important to make highly flexible designs. Therefore, we developed simple and accurate printing method of conductive silver ink for fabric substrates. In our previous work, we have achieved fine patterning of conductive polymer by selective-wetting method utilizing repellency of fluoropolymers and vacuum-ultraviolet (VUV)-light-induced hydrophilicity. Accordingly, to prepare fine wirings on fabrics, we focused on non-woven fabrics because of their uniformity and fine fibers, in which provide repellant surfaces by the lotus effect, and have employed selective-wetting method for non-woven fabric. Surface of non-woven fabric shows high water-repellency. By irradiation with VUV light at a wavelength of 172 nm, their surfaces become lyophilic and could be applied conductive silver ink. At the same time, VUV light irradiation through a photomask enables to draw fine silver ink patterns without ink bleeding to unirradiated region. The silver ink patterns were dried at 100 °C for 1 hour, and were coated with copper by electroless plating for good conductive wiring showed lower resistance up to 0.4 ohm/sq. These electrical wirings on non-woven fabrics are useful for development of smart textiles such as touch sensors.