TY - GEN
T1 - Liquid Metal as Electrical Interface Material with Temporal Stability and Stretch Tolerance
AU - Sato, Takashi
AU - Yamagishi, Kento
AU - Hashimoto, Michinao
AU - Iwase, Eiji
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/1/25
Y1 - 2021/1/25
N2 - Electrical interface material (EIM) is an important component to develop stretchable electronics. Currently available EIMs suffer from the trade-off between low value and stretch tolerance of contact resistance. To overcome this challenge, we demonstrated the use of liquid metal (LM) as an EIM between solid metal (SM) pads for stretchable electronic devices. With LM, we achieved low contact resistance with temporal stability and stretch tolerance. Our study suggested that the contact resistance between an LM and an SM decreases over time due to alloying, and the contact resistance was reduced to 18.6% in 103 days by ensuring the electrical connection under vacuum during the fabrication. Furthermore, the use of the LM as an EIM enabled maintaining the change in contact resistance below 9% during 100% stretching deformation repeated 100 times. These results suggest that LM can be used as an EIM with temporal stability and stretch tolerance.
AB - Electrical interface material (EIM) is an important component to develop stretchable electronics. Currently available EIMs suffer from the trade-off between low value and stretch tolerance of contact resistance. To overcome this challenge, we demonstrated the use of liquid metal (LM) as an EIM between solid metal (SM) pads for stretchable electronic devices. With LM, we achieved low contact resistance with temporal stability and stretch tolerance. Our study suggested that the contact resistance between an LM and an SM decreases over time due to alloying, and the contact resistance was reduced to 18.6% in 103 days by ensuring the electrical connection under vacuum during the fabrication. Furthermore, the use of the LM as an EIM enabled maintaining the change in contact resistance below 9% during 100% stretching deformation repeated 100 times. These results suggest that LM can be used as an EIM with temporal stability and stretch tolerance.
KW - Stretchable electronics
KW - contact resistance
KW - galinstan
KW - liquid metals
KW - stretch tolerance
KW - temporal stability
UR - http://www.scopus.com/inward/record.url?scp=85103445512&partnerID=8YFLogxK
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U2 - 10.1109/MEMS51782.2021.9375307
DO - 10.1109/MEMS51782.2021.9375307
M3 - Conference contribution
AN - SCOPUS:85103445512
T3 - Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
SP - 689
EP - 692
BT - 34th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 34th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2021
Y2 - 25 January 2021 through 29 January 2021
ER -