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Towards Transient Electronics through Heat Triggered Shattering of Off-the-Shelf Electronic Chips

Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112, USA
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Academic Editor: Nam-Trung Nguyen
Micromachines 2022, 13(2), 242; https://doi.org/10.3390/mi13020242
Received: 31 December 2021 / Revised: 28 January 2022 / Accepted: 28 January 2022 / Published: 31 January 2022
With most of the critical data being stored in silicon (Si) based electronic devices, there is a need to develop such devices with a transient nature. Here, we have focused on developing a programmable and controllable heat triggered shattering transience mechanism for any off-the-shelf (OTS) Si microchip as a means to develop transient electronics which can then be safely and rapidly disabled on trigger when desired. This transience mechanism is based on irreversible and spontaneous propagation of cracks that are patterned on the back of the OTS chip in the form of grooves and then filled with thermally expandable (TE) material. Two types of TE materials were used in this study, commercially available microsphere particles and a developed elastomeric material. These materials expand >100 times their original volume on the application of heat which applies wedging stress of the groove boundaries and induces crack propagation resulting in the complete shattering of the OTS Si chip into tiny silicon pieces. Transience was controlled by temperature and can be triggered at ~160–190 °C. We also demonstrated the programmability of critical parameters such as transience time (0.35–12 s) and transience efficiency (5–60%) without the knowledge of material properties by modeling the swelling behavior using linear viscoelastic models. View Full-Text
Keywords: transient electronics; shattering transience; heat trigger; off-the-shelf electronics; device fabrication transient electronics; shattering transience; heat trigger; off-the-shelf electronics; device fabrication
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MDPI and ACS Style

Pandey, S.; Mastrangelo, C. Towards Transient Electronics through Heat Triggered Shattering of Off-the-Shelf Electronic Chips. Micromachines 2022, 13, 242. https://doi.org/10.3390/mi13020242

AMA Style

Pandey S, Mastrangelo C. Towards Transient Electronics through Heat Triggered Shattering of Off-the-Shelf Electronic Chips. Micromachines. 2022; 13(2):242. https://doi.org/10.3390/mi13020242

Chicago/Turabian Style

Pandey, Shashank, and Carlos Mastrangelo. 2022. "Towards Transient Electronics through Heat Triggered Shattering of Off-the-Shelf Electronic Chips" Micromachines 13, no. 2: 242. https://doi.org/10.3390/mi13020242

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