Assembled Comb-Drive XYZ-Microstage with Large Displacements and Low Crosstalk for Scanning Force Microscopy

Gaopeng Xue, Masaya Toda, Xinghui Li, Xiaohao Wang, Takahito Ono

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

This paper proposes and demonstrates a chip-level-microassembly comb-drive XYZ-microstage for providing large displacements and low crosstalk in scanning force microscopy applications at low temperatures. The three-dimensional structure of the comb-drive XYZ-microstage, consisting of an in-plane XY-microstage, two out-of-plane Z-actuators, and a base substrate, was accurately and orderly constructed using microassembly technology. This configuration can overcome the out-of-plane stroke-space limitation of conventional monolithic-wafer-based XYZ-microstages, and the crosstalk movements resulting from the coupling connection between in-plane and out-of-plane actuation units can be avoided. The in-plane actuation unit of the XY-microstage can provide low-crosstalk movements in the X- and Y-directions, due to the design of the decoupling-motion structure and constraint of the capacitance-coupling crosstalk of the actuation voltages. Folded-flexure springs with high stiffness were adopted in the XYZ-microstage to enhance the lateral stability of movable combs and improve the range of achievable strokes. The assembled comb-drive XYZ-microstage could provide quite large displacements of 49.2 μ m , 27.9~μ m , and 50.5~μ m in the X-, Y-, and Z-directions, respectively. Furthermore, to demonstrate the feasibility of the fabricated XYZ-microstage, a magnetic resonance force microscopy measurement system was constructed using the scanning XYZ-microstage with a specimen of 1, 1-Diphenyl-2-picrylhydrazyl radical. The magnetic resonance force from the electron spin resonance excited in the specimen could be detected by scanning the specimen in a specific resonance region. The results demonstrate that the proposed microassembly with the optimized actuation-unit structure is a promising means of establishing a comb-drive XYZ-microstage with large displacements, low crosstalk, and high adaptability.

Original languageEnglish
Pages (from-to)54-62
Number of pages9
JournalJournal of Microelectromechanical Systems
Volume31
Issue number1
DOIs
Publication statusPublished - 2022 Feb 1

Keywords

  • comb-drive
  • crosstalk
  • Microassembly
  • scanning force microscopy
  • stroke
  • XYZ-microstage

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