PHOTORECEIVING CELL WITH VERTICAL COLOUR SEPARATION Russian patent published in 2008 - IPC H01L27/146 

FIELD: physics.

SUBSTANCE: invention refers to computer vision facilities and can be used in multispectral photodetector arrays, in particular for transformation of colour images of advanced format and high pixel density to electric signals in photo and video cameras. According to invention, photoreceiving cell with vertical colour separation is made as follows. Electrical reading circuit is connected to near-surface region of first conductivity type, while regime reading voltage is supplied to it. Charges of first polarity current carriers accumulated within exposure are formed to be carried to reading circuit from under areas of first conductivity type in areas of the second conductivity type located between all areas of first conductivity type. Vertical channel is formed through corresponding selection within channel areas, with concentration of barrier and base areas, and also their thickness, providing potential wells in areas of first conductivity type for first polarity current carriers of sufficient dimension to collect and store charges first polarity current photocarriers without interference. Note that reading circuit is designed so that it supplies regime reading voltage time-consistently to near-surface region of first conductivity type relative to reference areas at rate multiple to number of potential well representing a reading source, and respectively sufficient for successive charge flow from one potential well to another and to reading circuit from the first, second, third etc potential wells comprising the first, second, third etc areas of first conductivity type.

EFFECT: smaller cell area.

4 dwg