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Detectors: The Charge Injection Alternative

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Charge-injection device (CID) technology provides a means to convert optical signals from 185 nm to 1100 nm to electronic charges that can be read out as a video signal or processed via computer. The CID imagers also are capable of directly (or indirectly) converting particle photons including electrons, ions, x-rays and other forms of ionizing radiation to measurable levels of electronic charge.

Tony Chapman, Thermo Fisher Scientific Inc., CIDTEC Cameras & Imagers

Charged-injection device imagers are metal-oxide semiconductor (MOS) detectors that can be fabricated using PMOS, NMOS and CMOS integrated circuit technology, and may be configured as a single-element, linear device or two-dimensional pixel arrays. Individual pixels are formed by coupled MOS capacitors sharing the same row and column electrode (Figure 1). Incident light on the surface of a pixel is converted to a proportional amount of signal charge that is collected and stored beneath the pixel surface. Pixel readout occurs by sensing the charge transfer between the capacitors within the...Read full article

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