As mentioned in the introduction, this gold wire connection limits the efficiency of heat loss along the electrode contact for the LED heat dissipation, there are two solutions. One is to find substrate materials with high heat dissipation coefficient to replace alumina, including silicon substrate, silicon carbide substrate, anodized aluminum substrate or aluminum nitrous substrate. Among them, silicon and silicon carbide substrate material semiconductor characteristics, so that it is facing a severe test of LED heat dissipation at the present stage, and anodized aluminum substrate due to the strength of its anodized oxide layer is easy to lead due to fragmentation, so that it is limited in the practical application of LED heat dissipation. 0.32 inch 3421AG LED Common-Cathode CC 3421AG 7-Segment digit 3421BG Display 3421BG Common-Anode CA 0.32 inch 3412AG LED Common-Cathode CC 3412AG 7-Segment digit 3412BG Display 3412BG Common-Anode CA

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