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Kopin Unveils New GaN Contact for Blue LEDs

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TAUNTON, Mass., Nov. 25 -- Kopin Corp. has unveiled an ohmic contact technology on gallium nitride that exhibits low contact resistance and a high degree of stability. Kopin said this is the first time an epitaxial contact has been formed on GaN. The contacts are formed by depositing layers consisting of gold, nickel and gold on the P-type GaN surface and annealing in air for 30 minutes at 470 °C. The company said the new contacts, combined with other improvements, have enabled it to produce blue LED chips as bright as those commercially available but that require much lower drive voltage....Read full article

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    Published: November 2002
    ConsumerLight SourcesNews & FeaturesLEDs

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