Monolithically integrated glass microlens scanner using a thermal reflow process

Sunghyun Yoo, Joon Geun Ha, Joo Young Jin, Chang Hyeon Ji, Yong Kweon Kim

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17 Scopus citations


A monolithically integrated glass microlens optical scanner is presented. A new wafer-level fabrication approach addresses the issue of microlens integration and alignment in conventional microlens integrated devices. A through-silicon plano-convex glass microlens has been fabricated on a silicon substrate prior to the formation of an integrated microlens actuator, realized through two thermal reflow processes at 850 °C. A lateral comb drive is adapted to demonstrate the glass microlens scanner. The 800 m diameter microlens was laterally shifted up to ±51.6 m when an ac voltage of 28.5 V in amplitude was applied at a resonant frequency of 1.749 kHz at atmospheric pressure. The optical scanning angle of ±2.0° has been obtained with the fabricated device.

Original languageEnglish
Article number065012
JournalJournal of Micromechanics and Microengineering
Issue number6
StatePublished - Jun 2013


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