In a shielded reflective LED, each of light sources can be surface-mounted substantially without being influenced by heat distortion based on the difference in thermal expansion coefficient between resin and metal because the light source is so small-sized that only one light-emitting element is sealed...http://www.google.fr/patents/US6886962?utm_source=gb-gplus-shareBrevet US6886962 - Shielded reflective light-emitting diode
