This paper describes in detail our concept of quasi-static micro scanning mirrors enabling large static deflections and
linearized scanning using vertical out-of-plane comb drives. The vertical comb configuration is realized from a planar
scanner substrate by wafer bonding. The device concept is highly flexible by design; different kinds of vertical combs
(e.g. staggered and angular) can be realized without changing the technological process flow but by design
modifications, only. First demonstrator devices are presented: a) quasi-static 1D-scanners with 4 mm mirror diameter
and ±7.5° mechanical tilt angle for beam steering and b) a quasi-static / resonant 2D-scanner enabling 2D raster scanning
with SVGA resolution.
A technology approach is presented which enables an initial permanent counter electrode deflection of planar out of
plane comb drive actuators allowing quasistatic operation of an electrostatic microscanner. The device is assembled by
mounting a top wafer with salient stamps onto a mirror wafer. The commonly fix in plane counter electrode parts on the
mirror wafer are connected to deflectable platforms via a mechanical structure of coupled hinges. During the wafers
assembly the down pressing stamps displace the platforms and result in a predefined permanent out of plane counter
comb deflection.
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