Patent ID: 7535074

Claim:
A monolithically integrated vertical PIN photodiode formed in BICMOS technology and having a substantially planar surface facing the light and having a back side and anode terminals via p regions on a topside of the photodiode, wherein an i-zone of the PIN photodiode is formed by: (a) a combination of a first p − epitaxial layer with a thickness of substantially 15 μm at most and having a dopant concentration of less than 5*10 14 cm −3 , wherein the p − epitaxial layer is located on a p substrate; (b) a slightly doped n − epitaxial second layer adjacent to the first layer and having a dopant concentration in a range of substantially 10 14 cm −3 to 10 15 cm −3 , wherein an n + cathode of the PIN photodiode is incorporated into the second layer; and wherein, in lateral direction, said p regions delineate the second layer, and in addition to the anode terminals, a further anode contact area of the PIN diode is provided at the back side.