PHOTODETECTOR CELL WITH VERTICAL COLOUR SEPARATION Russian patent published in 2009 - IPC H01L31/04 

FIELD: information technology.

SUBSTANCE: invention relates to machine vision technology and can be used in high resolution video cameras and still cameras which use digital processing for optimising signals. The photodetector cell with vertical colour separation contains a reading circuit, detectors for blue, green and red components of received radiation, made in a semiconductor structure, with horizontal areas with first type of conductivity, lying on first, second and third depths with respect to the surface of the structure, respectively optimised on maximum absorption of blue, green and red radiation components, connected through p-n junctions by areas of first and/or second, opposite the first, type of conductivity with the near-surface areas of the second type of conductivity, surrounded by areas of the first type of conductivity with distribution of concentration of impurities, which creates a potential barrier for movement of minority current carriers in them. A horizontal area, lying on the third depth, is made for all cells in the layer on the substrate with first type of conductivity, and areas with second type of conductivity at any depth adjoin additional areas with second type of conductivity, lying outside exposed areas.

EFFECT: increase and/or aligning of dynamic range of detectors, simplification of technology and, consequently, reduction of cost.

2 dwg