Dalsa Corporation

Agnes Catharina Maria Kleimann

Jan Theodoor Jozef Bosiers

Laurent Louis Daniel Le Cam

Yvonne Astrid Boersma

A charge-coupled imager includes an imaging section, a read-out section, and a way to reduce the number of charge packets for every row read. The imager is switchable between at least two read-out modes. The imaging section includes image elements arranged in a two-dimensional pattern. The read-out section includes at least a first horizontal CCD channel disposed beside the two-dimensional pattern, a second horizontal CCD channel and vertical CCD channels interlineated within the pattern of image elements. The imager is operable so that every image element of a row is individually readable in a first read-out mode using the first horizontal CCD channel comprising n charge storage locations. The imager is further operable in a second read-out mode so that a lower horizontal sampling frequency is read from the read-out section than in the first read-out mode using a second horizontal CCD channel comprising fewer storage locations than n.

Multi-mode charge-coupled imager having plural readout sampling frequencies

Image recording device with improved image storage transition

The invention relates to a CCD of the buried-channel type comprising a charge-transport channel in the form of a zone ( ) of the first conductivity type, for example the n-type, in a well ( ) of the opposite conductivity type, in the example the p-type. In order to obtain a drift field in the channel below one or more gates ( ) to improve the charge transfer, the well is provided with a doping profile, so that the average concentration decreases in the direction of charge transport. Such a profile can be formed by covering the area of the well during the well implantation with a mask, thereby causing fewer ions to be implanted below the gates ( ) than below other parts of the channel. By virtue of the invention, it is possible to produce a gate ( ) combining a comparatively large length, for example in the output stage in front of the output gate ( ) to obtain sufficient storage capacity, with a high transport rate.

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Eindhoven, Netherlands

Agnes Catharina Maria Kleimann