TSMC exec: Replacing sapphire in LED lighting ICs is difficult

01/22/2013 | DigiTimes

Replacing sapphire as the base material for light-emitting diodes going into lighting applications is proving difficult to implement, according to Jacob Tam, president of TSMC Solid State Lighting, a subsidiary of Taiwan Semiconductor Manufacturing. Making 8-inch wafers of gallium nitride atop a silicon base is complicated, he said, and the brightness of LED chips made with that material is less than sapphire-based LEDs.

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