A specialty material suited
for small optoelectronic-package designs is available from Rogers Corp. (Rogers,
CT; 860/774-9605). The white epoxy molding material is formulated to endure
high solder temperatures while retaining the necessary optical, electrical,
and mechanical properties. Reflecton epoxy meets the demand for dense packaging
and components by reflecting "good" light and keeping out unwanted light, thus
enabling thinner package designs. By balancing high reflectivity with opacity,
Reflecton makes it possible for design engineers to eliminate the traditional
extra epoxy layer and to create more-efficient components. The epoxy displays
good IR solder-reflow capabilities; it is moisture resistant and provides lot-to-lot
quality and consistency.