It’s hard to believe that the first blue LED didn’t arrive until 1993. They look simple, but looks are deceiving (Fig. 1). 1. Image showing a blue InGaN-based LED with gold wire contacts (0.4 × 0.4 mm ...

However, mass production was what Nakamura's employer Nichia was interested in. The aluminum nitride trick discovered by Akasaki and Amano could not be consistently produced – it had to work without ...