Creep-resistant nanocrystalline gold-vanadium alloyed microcorrugated diaphragms (MCDS)

Research output: Chapter in Book/Report/Conference proceedingsConference proceedingpeer-review

Abstract

This paper presents new microcorrugated diaphragms (MCDs) capable of achieving large displacements (>20 μm) with the lowest reported stress relaxation today. These MCDs are fabricated by co-sputtering of gold (Au) and vanadium (V) followed by a 2-hour annealing at 300 °C. Compared to conventional RF MEMS sputtered Au films, the reported MCDs exhibit a 1.8× and a 10.5× lower stress relaxation rates at the 3rd and the 12th hour, respectively. The developed Au-V films demonstrate more than 50% smaller average grain size than pure Au, excellent process compatibility, and significantly lower stress relaxation rate. As a result, they are very promising in improving reliability issues of widely tuned RF MEMS devices.

Original languageEnglish
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.
Pages888-891
Number of pages4
ISBN (Electronic)9781479989553
DOIs
Publication statusPublished - 5 Aug 2015
Externally publishedYes
Event18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015 - Anchorage, United States
Duration: 21 Jun 201525 Jun 2015

Publication series

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

Conference

Conference18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015
Country/TerritoryUnited States
CityAnchorage
Period21/06/1525/06/15

Keywords

  • Annealing
  • co-sputtering
  • creep-resistant
  • gold-vanadium
  • grain size
  • microcorrugated diaphragm
  • nanocrystalline
  • RF MEMS
  • stress relaxation

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