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Photon Counting Semiconductor Detectors

A semiconductor and radiation detector technology, applied in the field of X-ray photon counting detectors, can solve the problem of reducing the size of the collection pixel electrode

Active Publication Date: 2018-10-26
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this concept, the pixel pitch is maintained, but the size of the collector pixel electrodes is further reduced such that the weight potential for even better constraints is provided by

Method used

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  • Photon Counting Semiconductor Detectors
  • Photon Counting Semiconductor Detectors
  • Photon Counting Semiconductor Detectors

Examples

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Embodiment Construction

[0018] In the present concept of the steering electrode, it is necessary to apply a voltage between the collector and the steering electrode, said voltage causing a compensation current injected by the steering electrode and / or by the collector. Furthermore, the fact that two different voltages need to be applied to electrodes close to each other adds technical complexity, for example, in terms of electrically isolating the electrodes from each other, as well as providing relatively high voltages (e.g., 50-200V) on the bonding substrate. aspect.

[0019] By using a spatially modulated doping profile within the detector crystal, supplying relatively high voltages to the steering electrodes is avoided. The doping is positioned substantially above the surface of the steering electrode, which is placed at the same or similar potential as the collector anode. At room temperature, the dopant atoms release holes or electrons depending on their type, so that the ions remain fixed wit...

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Abstract

A radiation detector (10) comprising: a semiconductor element (1) for generating positive holes and electrons; a cathode (2) formed on a first surface of said semiconductor element (1); and , a plurality of segmented anodes (3) formed on a second surface of said semiconductor element (1), said second surface being opposite to said first surface. Furthermore, a plurality of segmented steering electrodes (5a) are positioned adjacent to said plurality of segmented anodes (3). In addition, a plurality of dopant atoms are positioned over at least a portion of the plurality of segmented anodes (3) to reduce the interaction of the plurality of segmented anodes (3) with the plurality of segmented steering electrodes. The voltage difference between (5a).

Description

technical field [0001] The present application relates generally to X-ray photon counting detectors. Although the present application is described in connection with a particular application for computed tomography (CT), it also relates to other applications where it may be desirable to energy resolve detected photons having different energies. Background technique [0002] A computed tomography (CT) system includes a radiation source that emits multiple energy ionizing photons that pass through an examination region. Such a system also includes a radiation sensitive detector positioned on an opposite side of the examination region from the radiation source, the radiation sensitive detector detecting photons passing through the examination region. The detector generates an electrical signal, such as a current or voltage, for each detected photon. The detector also includes electronics for energy resolving the detected photons based on the electrical signal. [0003] A dir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/146G01T1/24
CPCH01L27/14676G01T1/241H01L31/022408H01L31/115H01L31/18
Inventor K·J·恩格尔C·赫尔曼
Owner KONINKLJIJKE PHILIPS NV