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11 October 1989 IT CCD Imaging Sensor With Variable Speed Electronic Shutter
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The Hole-Accumulation Diode-Sensor (HAD-Sensor) structure, which allows to implement the variable speed electronic shutter in the Interline Transfer (IT) CCD imaging sensor, has been developed. Based on this technology, a 2/3 inch imaging sensor with 420,000 picture elements for consumer, industrial, and professional use was manufactured. The theoretical lower limit of variable shutter speed is about 1/1,000,000 sec. in the case of exposure within the vertical blanking interval (i.e. below 1/787 sec.). This HAD-Sensor achieves the following five major results, which are essential to yield the variable speed electronic shutter in an IT CCD: ( 1 ) complete draining of unwanted stored charges into n-type substrate, ( 2 ) negligibly small lag, ( 3 ) dark current reduced to 1/10 of the conventional level, ( 4 ) smear reduced to 1/5 of the conventional level, and ( 5 ) increased blue sensitivity.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kikue Ishikawa, Masaharu Hamasaki, Tomoyuki Suzuki, Hideo Kanbe, Yoshiaki Kagawa, Katsuroh Miyata, and Kazuya Yonemoto "IT CCD Imaging Sensor With Variable Speed Electronic Shutter", Proc. SPIE 1107, Infrared Detectors, Focal Plane Arrays, and Imaging Sensors, (11 October 1989);


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