Light emitting diode package and fabrication method thereof

Abstract

The present invention provides an LED package and the fabrication method thereof. The present invention provides an LED package including a submount silicon substrate and insulating film and electrode patterns formed on the submount silicon substrate. The LED package also includes a spacer having a through hole, formed on the electrode patterns. The LED package further includes an LED received in the through hole, flip-chip bonded to the electrode patterns, and an optical element attached to the upper surface of the spacer.

1 . A light emitting diode package comprising: 
 a submount silicon substrate;    an insulating film and electrode patterns formed on the insulating film on the submount silicon substrate;    a spacer having a through hole, formed on the electrode patterns;    an LED received in the through hole, flip-chip bonded to the electrode patterns; and    a planar optical element adhered to the upper surface of the spacer.    
   
   
       2 . The light emitting diode package according to  claim 1 , wherein the spacer is made of silicon.  
   
   
       3 . The light emitting diode package according to  claim 2 , wherein a reflective surface is formed on the side surface of the through hole.  
   
   
       4 . The light emitting diode package according to  claim 2 , wherein a reflective metal film is coated on the side surface of the through hole in the spacer.  
   
   
       5 . The light emitting diode package according to  claim 1 , wherein the spacer is made of insulating resin.  
   
   
       6 . The light emitting diode package according to  claim 5 , wherein a reflective metal film is coated on the side surface of the through hole in the spacer.  
   
   
       7 . The light emitting diode package according to  claim 1 , wherein the insulating film is a thermal oxide film.  
   
   
       8 . The light emitting diode package according to  claim 1 , wherein the planar optical element is made of transparent glass or transparent polymer material.  
   
   
       9 . The light emitting diode package according to  claim 1 , wherein the planar optical element comprises fresnel lens.  
   
   
       10 . The light emitting diode package according to  claim 1 , wherein the planar optical element is adapted to divide light via grating.  
   
   
       11 . The light emitting diode package according to  claim 1 , wherein the planar optical element is adapted to divide light via a volume hologram or a plane hologram.  
   
   
       12 . The light emitting diode package according to  claim 1 , wherein the planar optical element comprises a diffusion plate which divides light.  
   
   
       13 . A fabrication method of a light emitting diode package comprising steps of: 
 forming an insulating film and electrode patterns on the insulating film on a submount silicon substrate;    mounting an LED on the electrode patterns by flip-chip bonding;    placing a spacer having a through hole on the electrode patterns to dispose the LED in the through hole; and    adhering a planar optical element to the upper surface of the spacer.    
   
   
       14 . The fabrication method of the light emitting diode package according to  claim 13 , wherein the step of placing a spacer on the electrode patterns comprises selectively etching a silicon substrate to form the through hole therein, and adhering the silicon substrate with the through hole to the electrode patterns.  
   
   
       15 . The fabrication method of the light emitting diode package according to  claim 14 , further comprising a step of coating a reflective metal film on the side surface of the through hole in the silicon substrate.  
   
   
       16 . The fabrication method of the light emitting diode package according to  claim 13 , wherein the step of forming a spacer on the electrode patterns comprises forming the through hole in an insulating resin substrate, and adhering the insulating resin substrate with the through hole formed therein to the electrode patterns.  
   
   
       17 . The fabrication method of the light emitting diode package according to  claim 16 , further comprising a step of coating a reflective metal film on the side surface of the through hole in the insulating resin substrate.  
   
   
       18 . The fabrication method of the light emitting diode package according to  claim 13 , wherein the insulating film is formed by thermally oxidizing the submount silicon substrate.  
   
   
       19 . A fabrication method of light emitting diode packages comprising steps of: 
 forming an insulating film and a plurality of electrode patterns in their order on a silicon substrate;    mounting a plurality of LEDs on the electrode patterns by flip-chip bonding;    placing a spacer having a plurality of through holes on the plurality of electrode patterns to dispose each of the plurality of LEDs in each of the through holes;    adhering a planar optical element to the upper surface of the spacer; and    dicing a resultant structure with the planar optical element adhered thereto into individual LED packages.