Patent ID: 8890198

Claim:
A conversion structure, comprising: a substrate, having a first surface and a second surface opposite to the first surface, wherein the second surface of the substrate having a plurality of trenches penetrating the substrate; a plurality of electromagnetic wave conversion elements, respectively disposed in each of the trenches, wherein each of the electromagnetic wave conversion elements is used to absorb a first electromagnetic wave having a first electromagnetic wave wavelength and to emit a second electromagnetic wave having a second electromagnetic wave wavelength, and the first electromagnetic wave wavelength is shorter than the second electromagnetic wave wavelength; a reflective film, covering the first surface of the substrate, wherein the first electromagnetic wave penetrates the reflective film, and the reflective film is used to reflect the second electromagnetic wave; and a plurality of reflective layers, respectively disposed between a sidewall of each of the trenches and each of the electromagnetic wave conversion elements, wherein the reflective layers are used to reflect the second electromagnetic wave.