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US 5563422

How Nichia Created the First Practical Blue LED Electrodes

A foundational patent describing the specific metal contacts needed to make gallium nitride LEDs efficient and commercially viable.

Statusexpired

Granted1996

Expires2014

Claims58

Forward citations251

Prior art6

AssigneeNichia Chemical Industries Ltd

InventorsShuji Nakamura, Takao Yamada +3

Patent B

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