A robust, fast electrothermal micromirror with symmetric bimorph actuators made of copper/tungsten

Xiaoyang Zhang, Boxiao Li, Xingde Li, Huikai Xie

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper reports a fast, robust electrothermal bimorph micromirror with a symmetric inverse-series-connected bimorph actuator. The actuator is made up of symmetric Cu-W bimorphs with high sensitivity and fast thermal response. A unique backside DRIE release process is developed to keep the mirror surface intact during release. The micromirror is able to perform both piston and tip-tilt motion. A maximum piston displacement of 169 μm is achieved with lateral shift less than 1.5 μm at the driving voltage of only 2.3 V. The maximum optical angle achieved is ±13° at 2.3 V. This mirror gives fast thermal response of less than 7.5 ms. The resonances of the piston and tip-tilt modes are 1.58 kHz and 2.74 kHz, respectively.

Original languageEnglish (US)
Title of host publication2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages912-915
Number of pages4
ISBN (Electronic)9781479989553
DOIs
StatePublished - Aug 5 2015
Event18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015 - Anchorage, United States
Duration: Jun 21 2015Jun 25 2015

Publication series

Name2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015

Other

Other18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015
CountryUnited States
CityAnchorage
Period6/21/156/25/15

Keywords

  • MEMS mirror
  • electrothermal actuation
  • inverse-series-connected
  • symmetric bimorph

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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