High-sensitivity triaxial tactile sensor with elastic microstructures pressing on piezoresistive cantilevers

Nguyen Thanh-Vinh, Nguyen Binh-Khiem, Hidetoshi Takahashi, Kiyoshi Matsumoto, Isao Shimoyama

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)


In this paper, we proposed a design to increase the sensitivity of a piezoresistive-type triaxial tactile sensor. Using conventional piezoresistive tactile sensors, in which the piezoresistive elements were completely embedded inside an elastic block, our proposed tactile sensor design features an air cavity underneath the piezoresistive elements. The cavity was created by pressing an elastic cap with microstructures onto the piezoresistive cantilevers of a sensor chip. We confirmed that the proposed design increased the sensitivity of the tactile sensor by approximately 150 times and 100 times in response to normal and lateral forces, respectively.

Original languageEnglish
Pages (from-to)167-175
Number of pages9
JournalSensors and Actuators, A: Physical
Publication statusPublished - 2014 Aug 15
Externally publishedYes


  • Air cavity
  • High sensitivity
  • PDMS cap
  • Piezoresistive cantilever
  • Triaxial tactile sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering


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