Method for manufacturing light emitting diode package
A method of manufacturing an LED package with improved light extraction efficiency. A light-emitting resin part of an LED package is formed and laser beam is irradiated on a surface of the light-transmitting resin part of the LED package to roughen the surface thereof.
1 . A method of manufacturing a light emitting diode package comprising:
forming a light-transmitting resin part of a light emitting diode package; and
irradiating a laser beam on a surface of the light transmitting resin part to roughen the surface of the light-transmitting resin part.
2 . The method according to claim 1 , wherein the light-transmitting resin part comprises a resin encapsulant for encapsulating an LED chip.
3 . The method according to claim 2 , wherein the step of forming the light-transmitting resin part comprises encapsulating the LED chip with the resin encapsulant and curing the resin encapsulant.
4 . The method according to claim 2 , wherein the resin encapsulant comprises a silicone resin.
5 . The method according to claim 2 , wherein the resin encapsulant comprises one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polyethylene terenaphthalate, polybutylene terephthalate, polyethersulfone, polyetheretherketone, polycarbonate, polyimide, polyetherimide, a cellulose triacetate resin, a polyacrylate resin, a polysulfone resin and a fluoride resin.
6 . The method according to claim 1 , wherein the step of forming a light-transmitting resin part comprises forming a lens.
7 . The method according to claim 6 , further comprising mounting the lens on the package body with the LED chip mounted therein between the step of forming a light-transmitting resin part and the step of irradiating a laser beam.
8 . The method according to claim 6 , further comprising mounting the lens on the package body with the LED chip mounted therein after the step of irradiating the laser beam.
9 . The method according to claim 6 , wherein the lens comprises a silicone resin or epoxy resin.
10 . The method according to claim 1 , wherein the step of irradiating the laser beam comprises placing a cover plate, which transmits the laser beam, on the light-transmitting resin part.
11 . The method according to claim 1 , wherein the step of irradiating the laser beam comprises placing a pattern mask, which selectively transmits the laser beam, on the light-transmitting resin part.
12 . The method according to claim 11 , wherein the pattern mask has a plurality of slits.
13 . The method according to claim 1 , wherein the laser beam comprises one selected from the group consisting of a KrF laser beam of a wavelength of 248 nm, an ArF laser beam of a wavelength of 193 nm, a CO 2 gas pulse laser beam and a Nd—YAG pulse laser beam of a wavelength of 355 nm.
14 . The method according to claim 1 , wherein the light transmitting resin comprises a silicone resin and the laser beam comprises a KrF laser beam having an energy density of 500 to 1000 mJ/cm 2 and a repetition frequency of 100 Hz.