Patent ID: 7196359

Claim:
A radiation-emitting chip ( 2 ) with a radiation-transmissive window ( 5 ), which has a refractive index n F and a main area ( 19 ), and with a multilayer structure ( 9 ), which contains a radiation-generating active layer ( 10 ) and is arranged at the main area ( 19 ) of the window ( 5 ), the window ( 5 ) being surrounded by a radiation-transmissive medium having a refractive index n 0 , which is less than the refractive index n F of the window, characterized in that the window ( 5 ) is bounded toward the radiation-transmissive medium at least by two areas ( 6 , 7 ), which form an angle β, for which the relationship 90°−α t <β<2α t is satisfied, where α t is given by α t =arc sin ( n 0 /n F ).