Laterally stacked glass substrates with high density electrical feedthroughs

Shuji Tanaka, Satoshi Fujimoto, Osamu Ito, Seong Hun Choe, Masayoshi Esashi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


This paper reports a novel method to produce high density feedthrough glass wafers with sufficient thickness for the packaging and interconnection of high density array micro electromechanical systems (MEMS). Pyrex glass wafers with thin film metal lines on the surface are stacked and bonded with each other using phenyl methyl siloxane-based adhesive. The stacked glass wafer block is then sliced using a wire saw as the slicing surfaces cross the adhesive bonding interfaces vertically. Prototyped feedthrough glass wafers were subjected to anodic bonding to a silicon wafer with diaphragms. The anodic bonding was successful, but hermetic sealing was not achieved. The bending of the bonded sample can be reduced by annealing the sample at 400 °C in a vacuum before anodic bonding.

Original languageEnglish
Article number023
Pages (from-to)597-602
Number of pages6
JournalJournal of Micromechanics and Microengineering
Issue number3
Publication statusPublished - 2007 Mar 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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