Radiant energy – Infrared-to-visible imaging – Including detector array
Patent
1980-06-16
1982-04-27
Willis, Davis L.
Radiant energy
Infrared-to-visible imaging
Including detector array
250349, 357 30, 358113, H01J 3149
Patent
active
043272916
ABSTRACT:
An infrared charge transfer device (CTD) imager system is disclosed which includes an optic system, a charge transfer device detector matrix and a signal processor. The optic system focuses infrared energy from a scene onto the detector matrix. The detector matrix produces electrical signals representative of the impinging energy and the signal processor processes the electrical signals into video signals. The CTD detector matrix comprises a plurality of charge injection devices (CID). Each CID has an IR sensitive area, and two metal/insulator/semiconductor gate electrodes surrounded by a field plate. One, a column gate electrode, is centrally located within the IR sensitive area and the other, a row gate electrode, surrounds the column gate electrode. In one embodiment, the field plate and column gate electrode are in a spaced but overlapping relationship with minimum overlap, and the row gate electrode is in a spaced relationship to the field plate and column gate electrode whereby the electric field generated between the edges (corners in particular) of the field plate and column and row gate electrodes is substantially reduced. The column electrode is formed as an integral part of the column read line metallization. In a second embodiment, the column gate electrode is formed in a spaced relationship to the field plate and on the same level without overlap. However, the column read line is spaced above the column electrode and electrically connected through a via. The electric fields at the edges and corners are substantially reduced in this second embodiment.
REFERENCES:
patent: 3988613 (1976-10-01), Brown et al.
patent: 4064533 (1977-12-01), Lampe et al.
patent: 4142925 (1979-03-01), King et al.
patent: 4143269 (1979-03-01), McCormack et al.
Chapman Richard A.
Hynecek Jaroslav
Kinch Michael A.
Comfort James T.
Grossman Rene E.
Sharp Melvin
Texas Instruments Incorporated
Willis Davis L.
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