Kyocera is the largest ceramic package supplier in the world. For high brightness LEDs, Kyocera has supplied its multilayer ceramic packages with reflector structure. Aluminum oxide ceramic, aluminum oxide ceramic with copper heat sink, and aluminum nitride are available as ceramic material options. Kyocera has also supplied aluminum nitride and aluminum oxide ceramic submounts with aluminum thin film metallization as reflector. Kyocera ceramic package business is expanding for high brightness LEDs.