# US 10,371,835 B2 · Microcell interconnection in silicon photomultipliers

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- Number: US 10,371,835 B2
- Document ID: US10371835B2
- Status: Granted
- Kind: B2
- Application number: 14/992,635
- Filed: 2016-01-11
- Published: 2017-07-13
- Granted: 2019-08-06
- Earliest claimed: 2016-01-11
- Assignees: General Electric Company
- Applicants: General Electric Company
- Inventors: Jianjun Guo; Adrian Ivan; Sergei Ivanovich Dolinsky; Geng Fu
- Web page: https://patentgrep.com/patent/US10371835B2

## CPC

- G01T 1/248: {Silicon photomultipliers [SiPM], e.g. an avalanche photodiode [APD] array on a common Si substrate}
- G01T 1/208: Circuits specially adapted for scintillation detectors, e.g. for the photo-multiplier section
- G01T 1/247: {Detector read-out circuitry (for processing gain or off-set correction H04N)}
- H10F 39/189: {X-ray, gamma-ray or corpuscular radiation imagers}
- G01T: MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry G01N23/00; tubes for determining the presence, intensity, density or energy of radiation or particles H01J47/00)
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION

## Abstract

A silicon photomultiplier array including a plurality of microcells arranged in rows and columns. A plurality of circuit traces connecting microcell output ports to the array pixel output port, with one or more impedance matching networks connected to at least one of the circuit traces. The impedance matching networks can be connected between each row circuit trace and the pixel output port. Impedance matching networks can be located between junctions of adjacent microcell output ports and row circuit traces.

## Claims

### Claim 1

A silicon photomultiplier array comprising:
a plurality of microcells within the photomultiplier array, the plurality of microcells arranged in rows and columns;
each of the plurality of microcells including an output port, and configured to provide a pulse waveform having pulse characteristics;
a plurality of circuit traces connecting the output port of the plurality of microcells to a pixel output port of the silicon photomultiplier array; and
an impedance matching circuit for each row of microcells, the impedance matching circuit connected to at least one of the circuit traces and located between a junction of each microcell output port of a last column and the pixel output port of the silicon photomultiplier array, wherein the impedance matching circuit is one of a single stub, a double stub, a lumped-element, and a stepped transmission line.

### Claim 2 (depends on 1)

The silicon photomultiplier array of claim 1, including the circuit traces constructed as transmission lines.

### Claim 3 (depends on 2)

The silicon photomultiplier array of claim 2, the transmission lines being one of a slot line, a microstrip, and a stripline.

### Claim 4 (depends on 1)

The silicon photomultiplier array of claim 1, including one impedance matching circuit connected between each circuit trace of each row and the pixel output port.