Sony has announced a new back-illuminated CMOS image sensor that will improve the still picture quality in still cameras and camcorders. This new back-illuminated CMOS image sensor comes with 1.75µm square pixels, five effective mega pixels, 60 frames/s. The image sensor has nearly twofold sensitivity and low noise and other enhanced imaging properties which has been achieved by illuminating the backside of the silicon substrate. Gizmodo reports:
In the new design, however, most of the photons goes through the on-chip lens and color filter directly into the new photo-diode structure, while the transistor layer sits at the bottom of the sensor. According to Sony, "that achieves a higher sensitivity of +6dB and a lower random noise of -2dB without light by reducing noise, dark current and defect pixels compared to the conventional front-illuminated structure."
Sony is planning on introducing the new technology in their next generation cameras, and hopefully we will see it in other products, especially cellphones.
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