A light emitting device with a heat sink composed of two materials

摘要

A light emitting device with a heat sink composed of two materials is provided. The device comprises: a light emitting material (101); and, a heat sink (103) comprising: a first material (105) configured to cool the light emitting material (101), the first material (105) comprising a first coefficient of thermal expansion (CTE); and, a second material (107) bonded to the first material (105) at an interface (109) there between, the second material (107) comprising a second CTE lower than the first CTE, the light emitting material (101) bonded to the first material (105) but not the second material (107).