Patent ID: 8796665

Claim:
A solid state radiation transducer, comprising: a growth substrate having a first side, a second side opposite the first side, and an opening extending from the second side to the first side; a radiation transducer having a first semiconductor material formed on the first side of the substrate, an active material formed on the first semiconductor material, and a second semiconductor material formed on the active material, wherein the first semiconductor material is exposed through the opening at the first side of the growth substrate such that the radiation can pass to and/or from the radiation transducer; and a first contact electrically coupled to the first semiconductor material and a second contact electrically coupled to the second semiconductor material, wherein: the radiation transducer is a light emitting diode in which the first semiconductor material comprises an N-type GaN, the second semiconductor material comprises a P-type GaN, and the active region comprises gallium nitride/indium gallium nitride; the growth substrate comprises silicon (1,1,1) at the first side; the solid state radiation transducer further comprises a cover having a phosphor and a transmissive matrix material that at least partially fills the opening.