High quality-factor quartz tuning fork glass probe used in tapping mode atomic force microscopy for surface profile measurement

Yuan Liu Chen, Yanhao Xu, Yuki Shimizu, Hiraku Matsukuma, Wei Gao

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper presents a high quality-factor (Q-factor) quartz tuning fork (QTF) with a glass probe attached, used in frequency modulation tapping mode atomic force microscopy (AFM) for the surface profile metrology of micro and nanostructures. Unlike conventionally used QTFs, which have tungsten or platinum probes for tapping mode AFM, and suffer from a low Q-factor influenced by the relatively large mass of the probe, the glass probe, which has a lower density, increases the Q-factor of the QTF probe unit allowing it to obtain better measurement sensitivity. In addition, the process of attaching the probe to the QTF with epoxy resin, which is necessary for tapping mode AFM, is also optimized to further improve the Q-factor of the QTF glass probe. The Q-factor of the optimized QTF glass probe unit is demonstrated to be very close to that of a bare QTF without a probe attached. To verify the effectiveness and the advantages of the optimized QTF glass probe unit, the probe unit is integrated into a home-built tapping mode AFM for conducting surface profile measurements of micro and nanostructures. A blazed grating with fine tool marks of 100 nm, a microprism sheet with a vertical amplitude of 25 μm and a Fresnel lens with a steep slope of 90 degrees are used as measurement specimens. From the measurement results, it is demonstrated that the optimized QTF glass probe unit can achieve higher sensitivity as well as better stability than conventional probes in the measurement of micro and nanostructures.

Original languageEnglish
Article number065014
JournalMeasurement Science and Technology
Volume29
Issue number6
DOIs
Publication statusPublished - 2018 May 15

Keywords

  • atomic force microscopy
  • glass probe
  • micro and nanostructures
  • quality factor
  • quartz tuning fork
  • surface profile measurement

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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