Serpentine Spring Corner Designs for Micro-Electro-Mechanical Systems Optical Switches with Large Mirror Mass
Resource
Optical Review 12 (4): 339-344
Journal
Optical Review
Journal Volume
12
Journal Issue
4
Pages
339-344
Date Issued
2005
Date
2005
Author(s)
Abstract
In this paper, we describe the design principles of serpentine springs with high reliability for the micro-electromechanical systems (MEMS) optical switches with large mirror mass. The most often seen failure mode of the MEMS optical switches under reliability tests is the breaking of these springs, which provide the restoring force for the MEMS actuators. The breaking points are usually at the turning corner of the serpentine springs when the MEMS optical switches are under a high G shock test or a vibration test. In order to overcome the difficulties, we redesigned the corner shapes of the springs with careful consideration. We will discuss the theoretical analysis and simulation modeling for the corner shapes of serpentine springs. MEMS optical switches with redesigned serpentine springs are fabricated and tested to prove the proposed design. The results show that the MEMS optical switches with new serpentine springs can pass rigorous reliability tests. © 2005 The Optical Society of Japan.
Subjects
Corner effects; Failure modes; MEMS; Optical switches; Reliability; Serpentine springs
Type
journal article
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