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Device with multiple photosensitive microunits arranged in row or matrix

A micro-unit and micro-sensitive technology, applied in measuring devices, electrical components, radiation measurement, etc., can solve problems such as high cost and complex production process, and achieve less current loss/power demand, cheap production, and low technical cost Effect

Active Publication Date: 2016-01-20
SIEMENS MEDICAL SOLUTIONS USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution includes active quenching and fully digital readout, with the disadvantage of higher cost due to complex production process

Method used

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  • Device with multiple photosensitive microunits arranged in row or matrix
  • Device with multiple photosensitive microunits arranged in row or matrix
  • Device with multiple photosensitive microunits arranged in row or matrix

Examples

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Embodiment Construction

[0024] figure 1 A circuit of a silicon photomultiplier F (English Silizium Photomultiplier=SiPM) that can be provided as the prior art is shown. A certain number of detector units or micro-units Mi,j are arranged in a matrix, which has an avalanche photodiode Di,j (English AvalanchePhotoDiode=APD) and a quenching resistor connected in series with the avalanche photodiode Ri, j, in order to constitute a photosensitive plane F or an optoelectronic device F.

[0025] The supply voltage Us is applied in the blocking direction of the detector unit Mi,j, that is to say the positive supply voltage is connected via the quenching resistor Ri,j to the cathode of the avalanche photodiode Di,j. The detector unit Mi,j works in Geiger mode, that is, the supply voltage Us is a DC voltage (Bias-Voltage_Bias, operating point / DC voltage point), which is slightly larger than the breakdown of the avalanche photodiode Di,j Voltage. The avalanche effect that occurs when a photon Ph1 is detected...

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Abstract

Each microcell (Mi,j) of the photosensor matrix (F) includes an amplifier element (Vi,j) connected across an avalanche photodiode (Di,j) in order to acquire and evaluate the time signal (t) directly by the microcell . The amplifier elements (Vi,j) are used as amplifiers, which activate a common trigger signal line (TRIG). Independently of this, the charge signal (Q) is obtained by integrating the current (I) over time (t) through the avalanche photodiode (Di,j).

Description

technical field [0001] The present invention relates to a device having a plurality of photosensitive microunits arranged in rows or in a matrix. Background technique [0002] A silicon photomultiplier consists of a detector cell or microcell, which respectively has an avalanche photodiode (APD) and a series resistor. When a feed voltage is applied, the photodiode, which normally operates in the cut-off direction, is partially turned on when radiation (eg photons) is incident. This effect is amplified by the avalanche effect within the photodiode. At the output of the microcell, ie at the node between the resistor and the photodiode, the voltage drop due to the conduction of the photodiode can be measured and evaluated. [0003] An array of detector cells is known from WO 2006 / 111883 A2, wherein each detector cell is designed as an avalanche photodiode. Avalanche photodiodes are integrated in a CMOS process. The digital circuit gives a first value at rest and another oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/24
CPCG01T1/248H01L27/14609H01L27/1443H01L27/14603
Inventor D.汉斯勒M.希恩勒
Owner SIEMENS MEDICAL SOLUTIONS USA INC
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