Abstract:We have developed and designed copper heat spreader to improve light extraction efficiency and heat dissipation of sapphire-based light-emitting diodes (LEDs) that were electroformed in close contact with sapphire. The junction temperature of a LED with copper substrate is lower than that of the original LED without copper based on simulation results. In addition, copper-surrounding the LED with protruded bottom surface exhibits similar thermal performance as a flat bottom surface. For practical fabrication, a… Show more
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