Symposium EQ04—Advanced Soft Materials and Processing Concepts for Flexible Printed Optoelectronic Devices and Sensors
Written by Corrisa Heyes
Unyong Jeong, Pohang University of Science and Technology
Skin-Inspired Deformable Devices for Artificial Skins and Health Care
Unyong Jeong discussed advances in stretchable nanomaterials able to provide tactile functionality with pressure sensing capabilities for applications in bio-interfaces and gentle-touch robotics. These ‘synthetic skins’ can be utilized in place of conventional rigid devices, even under deformation conditions where more general materials would either fail or under-perform. Additionally, the associated groundwork for integration into more complex systems was addressed with a primary focus on providing a deeper understanding of the hardware aspects of this emerging technology. Next steps include a study of manufacturing constraints and scalability.
Georg Gramlich, Karlsruhe Institute of Technology
Aerosol Jet Printing Process Considerations for Radio Frequency Packaging Applications
Georg Gramlich presents the challenges related to aerosol jet (AJ) printing. As an example of high precision, contactless deposition technique, AJ offers the capability to print in non-planar conditions and couples well with the emergence of microwave integrated circuits (MMICs) for packaging MMICs into radio frequency (RF) substrates. This technique provides shorter, well-matched connections when compared to traditionally used bond wires. Such processes are not without their fair share of initial roadblocks and design challenges. Methods of mitigating process development setbacks such as dry sintering, print speed, and print path irregularities were presented. Future work needs to be done to increase feature density and resolution.
Elliot Strand, University of Colorado
Wearable Active-Matrix Pressure Sensor Arrays for Spatiotemporal Measurement of Human Vital Signs
Wearable active-matrix pressure sensor arrays address the limitations of traditional single-point sensors (e.g. pulse oximeters and blood pressure cuffs) which are large, difficult to operate correctly, and not appropriate for long-term use. The active-matrix addresses the issue of finding an arterial pulse by presenting a larger sensing area compared to a single-point sensor, low power requirements allow for the development of unwired wearable configurations, and the optimized inkjet printing design allows for ultrathin, comfortable semi-long-term wear. The current design uses an impermeable substrate that would become irritating in longer-term applications; however, future work will involve collaboration to utilize a breathable substrate currently in development.