Materials issues in the processing, the operation and the reliability of MEMS

Abstract

In this article materials issues that arise during the processing and operation of micro-electro mechanical systems devices (MEMS), and their impact on the functionality and reliability, are discussed. The article starts with the example of an RF-MEMS switch process flow, indicating how and why certain materials are chosen. Then two specific MEMS materials issues, e.g. stiction and stress, are covered. Finally, the so-called 'zero-level' packaging of MEMS as well as the effect packaging can have on the device and its operation will be reviewed. © 2004 Elsevier B.V. All rights reserved.status: publishe