Abstract
A 2/3″ inch scheme 384 (H) ×490 (V) element interline CCD image sensor with a new anti-blooming structure was developed. Blooming was suppressed by a vertical overflow drain positioned under, rather than beside, a photodiode without sacrificing photo-sensitivity and dynamic range. Blooming was completely suppressed and smeared signal was reduced to 0.05% of the total signal under 10% vertical height illumination. Well balanced performance, namely, wide dynamic range (72dB), low random noise (65 RMS noise electrons per charge packet), high contrast transfer functions for horizontal and vertical directions and a spectrum response similar to the luminous efficiency curve, was obtained under moderate operating conditions.
