Method of fabricating light emitting diode package
View Patent ↗The invention relates to an LED package and proposes a method of fabricating an LED package including steps of providing a package substrate having a mounting area of an LED and a metal pattern to be connected with the LED, and plasma-treating the package substrate to reform at least a predetermined surface area of the package substrate where a resin-molded part will be formed. The method also includes mounting the LED on the mounting area on the substrate package and electrically connecting the LED with the metal pattern, and forming the resin-molded part in the mounting area of the LED to seal the LED package.
1. A method of fabricating a light emitting diode (LED) package comprising steps of:
providing a package substrate having a mounting area of an LED and a metal pattern to be connected with the LED;
plasma-treating the package substrate to reform at least a predetermined surface area of the package substrate where a resin-molded part will be formed;
mounting the LED on the mounting area on the substrate package and electrically connecting the LED with the metal pattern; and
forming the resin-molded part in the mounting area of the LED to seal the LED package.
2. The method according to claim 1 , wherein the package substrate comprises an upper substrate having a cavity with a sloped side wall, formed in an area corresponding to the mounting area of the LED, and a lower substrate having the mounting area of the LED and the metal pattern on an upper surface thereof.
3. The method according to claim 2 , wherein the step of plasma-treating is performed on the entire upper and lower substrates, respectively.
4. The method according to claim 3 , wherein the step of plasma-treating is performed at wafer level before the package substrate is cut into individual packages.
5. The method according to claim 1 , wherein the package substrate is a silicon substrate.
6. The method according to claim 5 , wherein the step of plasma-treating is performed in a vacuum-state with inert gas as a reactive gas at an output power of 700 W to 1500 W for 1 to 3 hours.
7. The method according to claim 6 , wherein the step of plasma-treating is performed with a silicon substrate kept at a temperature ranging from 80° C. to 120° C.
8. The method according to claim 1 , wherein the resin-molded part is made of epoxy resin, silicone resin, urethane resin or a compound thereof.
9. A method of fabricating a light emitting diode (LED) package comprising steps of:
providing a silicon package substrate having a mounting area of an LED and a metal pattern to be connected with the LED;
heat-treating the package substrate in an atmosphere of inert gas at a temperature ranging from about 300° C. to 400° C. for 1 to 3 hours in order to reform at least a predetermined surface area of the package substrate where a resin-molded part will be formed;
mounting the LED on the mounting area of the LED and electrically connecting the LED with the metal pattern; and
forming the resin-molded part in the mounting area of the LED to seal the LED package.