GaN as seen by the industry

More than a promising material for optoelectronics and electronics, GaN alr eady represents an economic reality. Domains of applications include blue a nd green LEDs, blue laser, high power-high frequency electronics, high temp erature electronics, ultraviolet detectors... For each of these application s, I will indicate the market size, the industrial requirements including t echnical and economical considerations, the state of the art and the remain ing open issues. (C) 2000 Academie des sciences/Editions scientifiques et m edicales Elsevier SAS.