Wafer-scale film encapsulation of micromachined accelerometers

W. T. Park, R. N. Candler, S. Kronmueller, M. Lutz, A. Partridge, G. Yama, T. W. Kenny

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

28 Scopus citations

Abstract

Micromachined accelerometers have been one of the most successful MEMS devices. Once a successful MEMS device is developed, packaging is the most critical step commercializing the device. Micromachined accelerometers are currently packaged with a separate lid made of glass or silicon bonded on the accelerometer device wafer. In this study, we have developed a new advanced packaging scheme using a thick film epitaxial grown polysilicon encapsulation. With this method, we can reduce the total die size and reduce an additional "cap" wafer; both result in cost reduction. Furthermore the encapsulation can withstand conventional post processing, such as dicing, wire bonding and even injection molding. This paper will discuss the packaging process and show performance results from encapsulated piezoresistive and capacitive accelerometers.

Original languageEnglish
Title of host publicationTRANSDUCERS 2003 - 12th International Conference on Solid-State Sensors, Actuators and Microsystems, Digest of Technical Papers
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1903-1906
Number of pages4
ISBN (Electronic)0780377311, 9780780377318
DOIs
StatePublished - 2003
Event12th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2003 - Digest of Technical Papers - Boston, United States
Duration: 8 Jun 200312 Jun 2003

Publication series

NameTRANSDUCERS 2003 - 12th International Conference on Solid-State Sensors, Actuators and Microsystems, Digest of Technical Papers
Volume2

Conference

Conference12th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2003 - Digest of Technical Papers
Country/TerritoryUnited States
CityBoston
Period8/06/0312/06/03

Keywords

  • Accelerometers
  • Commercialization
  • Costs
  • Encapsulation
  • Glass
  • Microelectromechanical devices
  • Packaging
  • Silicon
  • Thick films
  • Wafer bonding

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