Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Ag Electrode Strain Sensor Fabrication Using Laser Direct Writing Process

  • Kim, Hyeonseok (School of Mechanical Engineering, Seoul National University) ;
  • Shin, Jaeho (School of Mechanical Engineering, Seoul National University) ;
  • Hong, Sukjoon (School of Mechanical Engineering, Seoul National University) ;
  • Ko, Seung Hwan (School of Mechanical Engineering, Seoul National University)
  • Received : 2015.05.31
  • Accepted : 2015.07.28
  • Published : 2015.07.31
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Abstract

As several innovative technologies for flexible electric devices are being realized, demand for in-situ strain monitoring for flexible electric devices is being emphasized. Because flexible devices are commonly influenced by substrate strain, suitable strain sensors for flexible devices are essential for the sophisticated maneuvering of flexible devices. In this study, a flexible strain sensor based on an Ag electrode is prepared on a polyimide substrate using the LDW (laser direct writing) process. In this process, first, the Ag nanoparticles are coated on the substrate and selectively sintered using a focused laser. Because of the advantages of the LDW process (such as being mask-less, using low temperatures, and having non-vacuum characteristics), the entire fabrication process has been dramatically simplified; as a final outcome, a highly reliable strain sensor has been fabricated. Using this strain sensor, various strain conditions that arise from different bending radii can be detected by measuring real-time electrical signals.

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References

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