Patent ID: 7381359

Claim:
A method for making an encapsulant for an optoelectronic device or optical component, comprising: processing a glass characterized by a glass refractive index in the range of 148 to 1.60, with a variance of less than about 0.001, to form filler particles having diameters between 1 μm and 500 μm and characterized by a filler refractive index; preparing an epoxy resin composition characterized by the refractive index of an epoxy resin composition at a cured stage, wherein the epoxy resin composition comprises at least one hardener, and wherein the filler refractive index and the refractive index of the epoxy resin composition at a cured stage are sufficiently similar such that the encapsulant has optical transmittance of at least 20% when measured at a wavelength in the range of 400 nm to 900 nm at an encapsulant thickness of about 1 mm; heating the epoxy resin composition to a predetermined temperature for a time duration sufficient to increase the viscosity of the epoxy resin composition to a level such that the epoxy resin composition is characterized by a settling velocity equal to or greater than a predetermined value; mixing the epoxy resin composition with the filler particles to form a filled epoxy resin composition; encapsulating the optoelectronic device with the filled epoxy resin composition; and curing the filled epoxy resin composition encapsulating the optoelectronic device.