Thin stretchable substrates for wearable electronics

Naser Naserifar

Carnegie Mellon University


زمان: دوشنبه 12 شهریور-ساعت 13:30

اتاق کنفرانس پژوهشکده نانو


Stretchable electronics have demonstrated promise within unobtrusive wearable systems in areas such as health monitoring and medical therapy. One significant question is whether it is more advantageous to develop holistic stretchable electronics or to integrate mature CMOS in-to stretchable electronic substrates where the CMOS process is separated from the mechanical processing steps. A major limitation with integrating CMOS is the dissimilar interface between the soft stretchable and hard CMOS materials. To address this, we developed an approach to pattern multiple polymer layers around CMOS electronics to create a controllable material stiffness gradient that interfaces the highly rigid materials with soft materials. Our coupled computational and experimental approach reveals that adding just one intermediate layer results in 6 times increase in the strain failure threshold and subsequently decreases delamination. The results of our work will have high impact in diverse applications including skin sensors and wearable health monitoring systems

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