Patent ID: 6529241
Filing Date: 2003-03-04
Classification: H01L,H04N

Abstract:
An imaging system comprising:an image sensor having a plurality of photocells, the photocells to provide sensor signals that are a measure of the intensity of light incident upon the sensor, the photocells being part of an integrated circuit (IC) die, the IC die having a first region of semiconductor material having a first conductivity type, each of the plurality of photocells having a second region of semiconductor material having a second conductivity type opposite the first conductivity type and extending over a portion of the first region, the IC die to permit the incident light to enter a photosensitive portion of the photocell in the second region, third and fourth regions of semiconductor material having the first conductivity type extending over portions of the second region, the third and fourth regions respectively coupled to first and second electrical contacts, the first contact to provide a sensor signal of the photocell and the second contact to provide a signal for detecting saturation of the photocell.