|Title||Screen-printed inductive silver ink strain sensor on stretchable TPU substrate|
|Publication Type||Conference Paper|
|Year of Publication||2020|
|Authors||Smith, C. S., K. Sondhi, B. Y. Jimenez, H. Z. Fan, T. Nishida, and D. P. Arnold|
|Conference Name||2020 IEEE 70th Electronic Components and Technology Conference (ECTC)|
This work describes the design, fabrication, and characterization of screen-printed inductive silver ink strain sensors on stretchable thermoplastic polyurethane substrates. These sensors are made by screen-printing a flat wire inductor made from conductive silver ink onto a stretchable substrate. Stretching these structures results in an increase in their inductance, revealing a relationship between applied strain and measured inductance. Resulting devices show an initial inductance of 51 nH and a linear sensitivity of ~1.7 between 0% and 13% strain, which makes them suitable for applications where high strains are expected such as human health monitoring. Further, these sensors can be batch fabricated with screen-printing, making them an economical choice.