Design and Fabrication of an SOI Optical Switch with Backside Release for Anti-high-Overload

Jin Xie*, Zhenhua Liu, Xiao Zhang, Jun Cao, Jun Dai, Chao Zeng

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a new method for wafer-level packaging of MEMS silicon-on-insulator (SOI) sensors and actuators working in the situation of over-loading. The developed process starts with backside deep reactive ion etching (DRIE) of the substrate to define the support structures as down stop blocks. This is followed by hydrofluoric acid etching to remove excessive SiO2 layer underneath the structural area to free the movable device parts. Then, another step of DRIE was applied on the device layer to form the device features. As the area of support structures are much smaller than proof mass, no stiction was observed. Finally, a glass wafer was used to encapsulate the switch using an anodic bonding technique to form a up stop block. In the work described here, the process is demonstrated for micromachining of an optical switch surviving from the high-impact overload environment at 20,000 g with pulse-width 120 μs.

Original languageEnglish
Title of host publicationAdvances in Mechanical Design - The Proceedings of the 2023 International Conference on Mechanical Design, ICMD 2023
EditorsJianrong Tan, Yu Liu, Hong-Zhong Huang, Jingjun Yu, Zequn Wang
PublisherSpringer Science and Business Media B.V.
Pages2605-2613
Number of pages9
ISBN (Print)9789819709212
DOIs
Publication statusPublished - 2024
EventInternational Conference on Mechanical Design, ICMD 2023 - Chengdu, China
Duration: 20 Oct 202322 Oct 2023

Publication series

NameMechanisms and Machine Science
Volume155 MMS
ISSN (Print)2211-0984
ISSN (Electronic)2211-0992

Conference

ConferenceInternational Conference on Mechanical Design, ICMD 2023
Country/TerritoryChina
CityChengdu
Period20/10/2322/10/23

Keywords

  • Backside DRIE
  • High-impact overload
  • Optical switch

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