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Highly Integrated Elastic Island-Structured Printed Circuit Board with Controlled Young's Modulus for Stretchable
Duho Cho1,2, Junhyung Kim1,3, Pyoenggeun Jeong1,3
1Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeongro, Daejeon 305-600, Korea.
Micromachines
|July 8, 2020
Summary
Researchers developed a highly stretchable printed circuit board (PCB) using 3D printing. This durable and patternable stretchable PCB significantly reduces stress on mounted components, enabling functional electronic devices under extreme stretching.
Area of Science:
- Materials Science
- Electrical Engineering
- Additive Manufacturing
Background:
- Stretchable printed circuit boards (PCBs) are crucial for next-generation electronics.
- Existing stretchable PCBs face challenges in high integration, durability, and patternability.
Purpose of the Study:
- To develop a highly stretchable, durable, and patternable island-structured PCB.
- To demonstrate the PCB's ability to withstand high levels of integration and stretching while protecting mounted components.
Main Methods:
- Fabrication of an island-structured stretchable PCB using 3D printing.
- Controlled material properties (Young's modulus, viscosity) via reinforcing agents and crosslinking.
- Integration of various electronic components onto the stretchable PCB.
Main Results:
- Achieved 71.3% stretchability even at high integration levels.
- Reduced stress on mounted components by 99.9% under >70% stretching.
- Demonstrated a functional 4x4 capacitance sensor array in a keypad at 50% stretching.
Conclusions:
- The developed island-structured stretchable PCB meets the demands for high stretchability, durability, and patternability.
- The novel PCB design effectively mitigates stress on integrated components, enhancing device reliability.
- This technology enables robust, stretchable electronic applications, including sensor keypads.
Keywords:
3D nozzle printingdegree of integrationisland structurestretchable printed circuit board (PCB)substrateMore Related Videos
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