| AVS 64th International Symposium & Exhibition | |
| Manufacturing Science and Technology Group | Thursday Sessions |
| Session MS-ThM |
| Session: | Additive and Other Novel Manufacturing Techniques |
| Presenter: | Jesse Jur, North Carolina State University |
| Authors: | J.S. Jur, North Carolina State University R. Bhakta, North Carolina State University H. Shahariar, North Carolina State University H. Soewardiman, North Carolina State University |
| Correspondent: | Click to Email |
Direct write printing is studied as a method for producing large-area electronics directly onto flexible textile substrates. This process delivers viscous conductive particle inks in the range of 1 - 20 kilo-cps to a surface via a pressure-backed nozzle, making it a process that has key similarities and differences to traditional screen-printing and ink-jet printing. In this work, key correlations are defined between the print head speed and viscosity on the ability to design electronic device structures on textile substrates. For standard surface printing on the textile, sheet resistance values ranges from 5 - 16 mOhms/sq for Ag and Ag/AgCl inks. In addition, the ability to design devices through the bulk of the textile is explored. Ink penetration is shown to vary between to 100 microns into the textile structure based on the hydrophobic characteristic of the textile substrate, ink viscosity and the delivery pressure of the ink. Such penetration is shown to fabricate multi-layered printed structures on the surface and back of the textile. Device applications range from printed/flexible heaters, antennas, circuit boards, and dry electrodes for biopotential monitoring.