Electrical Performance of Fractal Web as Flexible Interconnects

Bhattacharjee, Ananya; Baruah, Ratul Kumar

doi:10.1109/laedc54796.2022.9908197

2022 IEEE Latin American Electron Devices Conference (LAEDC) 2022

DOI: 10.1109/laedc54796.2022.9908197

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Electrical Performance of Fractal Web as Flexible Interconnects

Ananya Bhattacharjee

Ratul Kumar Baruah

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2024

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Living hinges for resilient and recyclable paper-based flexible printed electronics

Wu,

Graddage,

Lee

et al. 2024

Flex. Print. Electron.

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The ability to fabricate electronics by printing has enabled an array of technologies that can create intelligent or smart packaging; however, this can come at the cost of recyclability. Selection of materials compatible with recycling streams is possible, such as paperboard and carbon inks, but there is a trade-off in terms of performance, flexibility and reliability.A major challenge for the use of paperboard is delamination and deformation when subject to small bend radii. The substrate has a tendency to crease when bent beyond a critical radius, which can fracture the surface and any traces printed onto it, causing device failure. We have demonstrated that the use of kerf cuts to form a living hinge, similar to that used in woodworking, can increase the flexibility of paperboard and allow reliable bending of conductive traces.We have identified the key design parameters of such a living hinge and evaluated their effect on the flexibility of a typical paperboard used in packaging. We then demonstrated that conductive traces of silver or carbon can withstand repeated bending with 100% reliability, compared to a worst case of 16% of control sample traces surviving the same test. Additionally, we demonstrated that the hinges improve the consistency of the trace resistance when subject to repeat bending. The behaviour of the resistance change as a function of bending was seen to be dependent upon the ink material, likely due to differing morphologies. We demonstrate the applicability of this technique in a smart device for medication adherence packaging.

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Living hinges for resilient and recyclable paper-based flexible printed electronics

Wu,

Graddage,

Lee

et al. 2024

Flex. Print. Electron.

View full text Add to dashboard Cite

show abstract

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Electrical Performance of Fractal Web as Flexible Interconnects

Cited by 1 publication

References 12 publications

Living hinges for resilient and recyclable paper-based flexible printed electronics

Living hinges for resilient and recyclable paper-based flexible printed electronics

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