Packaging assemblies for optically interactive devices and methods of forming
the packaging assemblies in an efficient manner that eliminates or reduces the
occurrence of process contaminants. In a first embodiment, a transparent cover
is attached to a wafer of semiconductor material containing a plurality of optically
interactive devices. The wafer is singulated, and the optically interactive devices
are mounted on an interposer and electrically connected with wire bonds. In a second
embodiment, the optically interactive devices are electrically connected to the
interposer with backside conductive elements. In a third embodiment, the optically
interactive devices are mounted to the interposer prior to attaching a transparent
cover. A layer of encapsulant material is formed over the interposer, and the interposer
and encapsulant material are cut to provide individual packaging assemblies. In
a fourth embodiment, the optically interactive devices are mounted in a preformed
leadless chip carrier.