Design, process and performance simulation of a 360x360-element very high frame rate burst-image sensor
Department of Electrical and Computer Engineering
Doctor of Philosophy
Kosonocky, Walter F.
Cornely, Roy H.
Farmer, Kenneth Rudolph
Charge coupled devices --Computer simulation.
Infrared imaging --Computer simulation.
A process was developed for fabrication of 360x360-element Very High Frame Rate (VHFR) burst-image sensor on the bases of one-dimensional (1-D) and two-dimensional (2-D) device and process simulations using SUPREM III, SUPREM IV, PISCES IIB and ISE-TCAD software, and the process data provided by the David Sarnoff Research Center. This process includes SiO2-Si3N4 gate dielectric, four-levels of polysilicon, three-levels of metal, eight implants, and requires twenty-one mask levels. The imagers with a 2-cmx2-cm chip size were fabricated at the David Sarnoff Research Center. The VHFR burst-image sensor is capable of capturing images at frame rates up to 106 frames/sec. It stores continuously the last 30 image frames at the CCD pixel memory and reads out the detected frames at a slow rate.
1-D and 2-D simulation study is presented for optimization of the charge handling capacity of the buried-channel CCD (BCCD) pixel memory elements and simulation results are compared with the experimental data.
A new concept was developed and demonstrated for large high-speed photodetector with complete charge readout in less than 0.1 μsec. The high-speed photodetector is in the form of a graded three-potential-level pinned-buried BCCD structure. The simulation results of the 33-μm long photodetector of the VHFR burst-image sensor showed that a complete charge read out can be achieved in less than 0.1 μsec. Frame-to-frame image lag of less than 1.0% was demonstrated for operation of the imager with frame integration time of 1.0 μsec for optical test pattern illuminated by 0.4 μsec LED pluses.
njit-etd1996-033 (301 pages ~ 15,671 KB pdf)
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Created August 16, 2007