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Planar and Three-Dimensional Printing of Conductive Inks
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Three-Dimensionally Printed Micro-electromechanical Switches.

Yongwoo Lee1, Jungmin Han1, Bongsik Choi1

  • 1School of Electrical Engineering , Kookmin University , Seoul 02707 , Korea.

ACS Applied Materials & Interfaces
|April 25, 2018
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate facile 3D printing of micro-electromechanical (MEM) switches using conductive polylactic acid and poly(vinyl alcohol). These 3D-printed MEM switches show excellent electromechanical properties, paving the way for advanced 3D-printed electronics.

Keywords:
3D printerMEMSswitchesthermoplasticwater-soluble

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Mechanical Engineering

Background:

  • Three-dimensional (3D) printing offers advanced manufacturing capabilities, overcoming limitations of traditional two-dimensional (2D) processes.
  • Complex structures can be fabricated in a single step using computer-aided design (CAD) files, reducing manufacturing complexity.
  • Micro-electromechanical (MEM) switches are crucial components in various electronic devices.

Purpose of the Study:

  • To demonstrate the first facile and time-saving 3D printing of two-terminal micro-electromechanical (MEM) switches.
  • To explore the use of thermoplastic materials for fabricating functional MEM switches.
  • To evaluate the electromechanical properties of the 3D-printed MEM switches.

Main Methods:

  • Utilized two thermoplastic materials: conductive polylactic acid for electrodes and poly(vinyl alcohol) as a sacrificial layer.
  • Employed 3D printing to fabricate freely suspended and fixed electrodes and to create an air gap for the MEM switches.
  • Characterized the electromechanical properties of the fabricated switches.

Main Results:

  • Successfully 3D printed two-terminal MEM switches with complex geometries.
  • Achieved excellent electromechanical properties, including abrupt switching characteristics.
  • Obtained an outstanding on/off current ratio exceeding 10^6.

Conclusions:

  • The study presents an innovative contribution to 3D printing applications, particularly in MEM device manufacturing.
  • Highlights a viable and attractive method for realizing 3D-printed electronics.
  • Suggests potential for broader applications in MEM devices and sensors through 3D printing technology.