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3D polymer objects with electronic components interconnected via conformally printed electrodes.

Yejin Jo1, Ju Young Kim, Sungmook Jung

  • 1Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), 19 Sinseongno, Yuseong-gu, Daejeon 305-600, Korea. youngmin@krict.re.kr sjeong@krict.re.kr.

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Summary
This summary is machine-generated.

Researchers created 3D polymer objects with integrated electrical circuits using conductive inks. This hybrid additive manufacturing approach enables complex, functional 3D electronics with embedded components and printed interconnections.

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Area of Science:

  • Additive Manufacturing
  • Materials Science
  • Electrical Engineering

Background:

  • Traditional electronics manufacturing involves multiple steps and material limitations.
  • Integrating electrical components within 3D structures presents significant fabrication challenges.

Purpose of the Study:

  • To develop a hybrid additive manufacturing technique for fabricating 3D polymer objects with embedded and interconnected electrical components.
  • To demonstrate the feasibility of creating functional 3D electronic devices using conformal printing of conductive inks.

Main Methods:

  • Stereolithography was used to create 3D polymer objects with internal cavities and recessed surfaces.
  • Conductive silver/carbon nanotube inks were conformally printed onto the polymer surfaces and through vertical vias to form electrodes and interconnections.
  • Electrical components such as microcontrollers, resistors, batteries, LEDs, and sensors were integrated into the 3D structures.
  • Annealing at temperatures below 100 °C was performed to achieve high conductivity in the printed electrodes.

Main Results:

  • Successfully fabricated 3D polymer objects containing functional electrical circuits.
  • Achieved electrode conductivity of approximately 2 × 10^4 S cm^-1 after low-temperature annealing.
  • Demonstrated functional 3D electronic devices, including a circuit operated by an air-suspended switch and a complete 3D circuit board.

Conclusions:

  • The hybrid additive manufacturing approach enables the seamless integration of electrical functionality within 3D polymer structures.
  • This method offers a versatile platform for creating complex, customized 3D electronic devices.
  • The low-temperature annealing process is compatible with a wide range of polymer substrates and electronic components.