Substrate for light emitting diodes

Abstract

A substrate has a pair of metal bases, and a first heat insulation layer disposed between the metal bases. A second heat insulation layer is securely mounted on the metal bases, and a pair of circuit patterns are securely mounted on the second heat insulation layer for mounting an LED.

1 . A substrate comprising: 
 a pair of metal bases;    a first electrical insulation layer disposed between the metal bases;    a second electrical insulation layer securely mounted on the metal bases; and    mounting means for mounting an LED on the substrate.    
   
   
       2 . The substrate according to  claim 1  wherein the mounting means comprises a pair of circuit patterns securely mounted on the second electrical insulation layer, the LED is securely mounted on both the circuit patterns.  
   
   
       3 . The substrate according to  claim 1  wherein the mounting means comprises a hole formed in the second electrical insulation layer to expose surfaces of metal bases, the LED is securely mounted on the metal bases.  
   
   
       4 . The substrate according to  claim 2  further comprising upper and lower electrodes provided on an upper surface of the circuit patterns and on undersides of the metal bases.  
   
   
       5 . The substrate according to  claim 2  wherein one of the metal bases is different from the other metal base in size of sectional shape.