Translator Disclaimer
4 February 2010 Performance and reliability assessment of a dielectric charging guard in MEMS optical switch systems
Author Affiliations +
Abstract
Optical MEMS switching technology has attracted attention in managing data flow due to its compactness and robustness. It allows hundreds of optical channels to be switched by micro-mirrors with very low power consumption. Furthermore, the ability to switch signals independent of data rates, formats, wavelengths and protocols is advantageous in many real world environments such as internet peering exchanges, undersea cable landing locations and data centers. All of these applications require a highly reliable and stable switching system. Dielectric isolation has a huge impact on major failure modes of capacitive MEMS devices such as breakdown and charging. This issue becomes more challenging in electrostatic MEMS optical switches since they usually operate at relatively high voltages. The charges trapped in this dielectric layer could cause interference in the electric field, resulting in erratic responses of the steering mirrors and instability of pointing accuracy over temperature and time, which greatly degrades the system performance. Aiming at reducing charging and preventing high voltage breakdown, a dielectric charging guard has been developed by using an oxide "fence" with extended breakdown path length that is shielded by conductive sidewalls of the silicon interposer. In this paper, the reliability tests as well as the performance impact to the optical switch will be presented, including characterizations of breakdown voltage, leakage current, and charging verses temperature. The test results demonstrate highly repeatable switching accuracy of micro-mirrors with very low drift at varied temperature. Failures induced by fabrication will also be discussed.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ping Zhang, Emily Carr, Doug Keebaugh, and Kelvin Chau "Performance and reliability assessment of a dielectric charging guard in MEMS optical switch systems", Proc. SPIE 7592, Reliability, Packaging, Testing, and Characterization of MEMS/MOEMS and Nanodevices IX, 75920Z (4 February 2010); https://doi.org/10.1117/12.851714
PROCEEDINGS
8 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

A study on high isolation RF MEMS switch
Proceedings of SPIE (February 06 2006)
Microelectromechanical optical cross-connects (OXCs)
Proceedings of SPIE (October 17 2001)
Novel MEMS torsional mirror optical switch
Proceedings of SPIE (May 06 2004)

Back to Top