A method for increasing the conversion gain of an active pixel and the corresponding active pixel

摘要

The present invention provides an active pixel, which a semiconductor layer (5) with dopants of a first conductivity type, wherein the semiconductor layer (5) a first region (1) and a second region (2), both with dopants of a second conductivity type, wherein the first region (1) for the collection of charge carriers in the semiconductor layer (5) is formed by electromagnetic radiation can be produced, whereby the first region (1) a surface and a limit of this surface has, wherein the second region for receiving in the first region, collected charge carriers, wherein the semiconductor layer (5) further comprises a third region (3) with dopants of the first conductivity type with a higher doping level than the semiconductor layer (5), wherein the third region (3) forms a barrier layer, in order to the diffusion of the charge carriers of the semiconductor layer in the second region (2) to substantially prevent. Over a part of its limit is the first region (1) of the third region (3) by means of a zone of the semiconductor layer (5) for generating a zone (9) separately. The effect of the separation is an improvement of the amplification of the component.