A method for forming a standoff structure for packaging devices, e.g.,
optical devices, integrated circuit devices. The method includes
providing a substrate, e.g., silicon wafer. The substrate includes a
first surface region, a second surface region, and a thickness defined
between the first surface region and the second surface region. The
method includes protecting selected portions of the first surface region
using a masking layer while leaving a plurality of unprotected regions.
Preferably, each of the unprotected regions is to be associated with an
opening through the thickness of the substrate. The method causes removal
of the plurality of unprotected regions to form a plurality of openings
through the thickness of the substrate to provide a resulting patterned
substrate. Each of the openings is bordered by a portion of the selected
portions of the first surface region. Preferably, etching techniques,
such as wet etch or dry etching, can be used, depending upon the
embodiment. The method removes the masking layer via ashing or stripping.
In a specific embodiment, the method further includes bonding a handle
substrate to the patterned substrate. Preferably, the handle substrate is
optically transparent. Each of the openings is bordered by a portion of
the handle substrate to form a recessed region.