Record Details

Material selection for MEMS devices

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Field Value
 
Title Material selection for MEMS devices
 
Creator Pratap, Rudra
Arunkumar, A
 
Subject MEMS devices
Material performance indices
Thermoelastic damping
MEMS gyroscope
MEMS ultrasound transducer
 
Description 358-367
As MEMS design matures and migrates from process centric design to performance based design, MEMS designers would need a rational method for selecting an appropriate material that is not based on ease of processing alone. While there is a growing number of thin film materials that can be used in micromachining for MEMS devices, the selection of a particular material is rarely based on quantifiable criterion that relates directly to the optimum performance of the device. In this study, we present a methodology for creating material related device performance indices that can be used for selecting best possible material for a device. This study is inspired by the Ashby approach and its extension to the microworld in recent studies, where materials are graded on material performance indices and the most appropriate material is selected from the Ashby charts so created. We extend this concept further in this paper and create device performance indices that can be used to grade MEMS materials in performance parameter space. We first create and discuss a material index for thermoelastic damping, an important index for vacuum packed dynamic MEMS devices that has been missing from the list of performance indices previously considered. We present two case studies of material selection, for a MEMS gyroscope and a MEMS ultrasound transducer, to illustrate the methodology and show two different approaches for creating optimality criterion in the presence of several competing performance indices.
 
Date 2008-10-31T10:25:44Z
2008-10-31T10:25:44Z
2007-04
 
Type Article
 
Identifier 0019-5596
http://hdl.handle.net/123456789/2328
 
Language en_US
 
Relation B81B7/02
 
Publisher CSIR
 
Source IJPAP Vol.45(4) [April 2007]