Patent ID: 7737460

Claim:
A white light emitting diode (LED) comprising: a crystalline sapphire substrate having a first main surface and a second main surface located on an opposite side to the first main surface; a light emitting diode (LED) chip formed on the first main surface of the substrate, the LED chip being fabricated in a semiconductor stack structure including a light emitting layer and emitting light of a predetermined wavelength; a light extracting film formed on the second main surface of the substrate, the light extracting film being formed of a material having a refractive index within a range of ±5% of a refractive index of the substrate, and having a surface located on an opposite side to the substrate and processed into a recess and projection shape by having recesses extending into a portion of the light extracting film; and a phosphor member provided on the light extracting film on an opposite side thereof to the substrate, the phosphor member generating white light due to light incident thereon through the light extracting film, wherein the light extracting film is formed of an SiON film, a Y 2 O 3 film, a MgO film, a Sm 2 O 3 film, a Nd 2 O 3 film, an amorphous Al 2 O 3 film, or an SiO 2 -TiO 2 film, wherein an interval between adjacent projections of the recess and projection shape of the light extracting film is 50 nm to 1 μm and a height of each of the projections is 100 nm to 1 μm.