Cantilever with High Aspect Ratio Nanopillars on Its Top Surface for Moisture Detection in Electronic Products

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12 Citations (Scopus)

Abstract

This work reports the patterning silicon pillars by metal-assisted chemical etching (MACE) process as a post process on a silicon cantilever for a moisture detection. Although the cantilever is very fragile, the patterning of the pillar structures on the cantilever has been successfully demonstrated. The cantilever coated with a material absorbing water (such as polyimide and mesoporous silica) can use as a humidity sensor. Its bending is due to the surface stress change from water molecule absorption. However, the bending of the cantilever is usually at a small value. Here, the silicon cantilever with high aspect ratio pillars on its surface is proposed, which is expected for a larger bending of the cantilever during the water molecule absorption. The moisture detection utilizes the principle that the pillars stack together based upon the condensation behavior of a water vapor on their surfaces.

Original languageEnglish
Article number1700203
JournalAdvanced Engineering Materials
Volume19
Issue number11
DOIs
Publication statusPublished - 2017 Nov

Keywords

  • cantilever
  • high aspect ratio silicon pillars
  • metal-assisted chemical etching
  • moisture detection

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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