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No. Publication Number Title Publication/Patent Number Publication/Patent Number Publication Date Publication Date
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1 US10535703B2
Methods of making semiconductor X-Ray detector
Publication/Patent Number: US10535703B2 Publication Date: 2020-01-14 Application Number: 16/185,370 Filing Date: 2018-11-09 Inventor: Cao, Peiyan   Song, Chongshen   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: H01L27/146 Abstract: Disclosed herein is an image sensor and a method of making the image sensor. The image sensor may comprise one or more packages of semiconductor radiation detectors. Each of the one or more packages may comprise a radiation detector that comprises a radiation absorption layer on a first strip of semiconductor wafer and an electronics layer on a second strip of semiconductor wafer. The radiation absorption layer may be continuous along the first strip of semiconductor wafer with no coverage gap. The first strip and the second strip may be longitudinally aligned and bonded together. The radiation detector may be mounted on a printed circuit board (PCB) and electrically connected to the PCB close to an edge of the radiation detector.
2 US2020003914A1
PORTABLE RADIATION DETECTOR SYSTEM
Publication/Patent Number: US2020003914A1 Publication Date: 2020-01-02 Application Number: 16/565,450 Filing Date: 2019-09-09 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: G01T1/24 Abstract: An apparatus for detecting radiation, comprising: a first radiation absorption layer configured to generate first electrical signals from a photon of the radiation absorbed by the first radiation absorption layer, wherein the first radiation absorption layer comprises a first electrode; an electronic system configured to process the first electrical signals; a counter configured to register a number of photons absorbed by the radiation absorption layer; a controller; the controller is configured to cause the number registered by the counter to increase by one; a power supply; and a communication interface configured for the electronic system to communicate with outside circuitry.
3 US2020150291A1
RADIATION DETECTOR WITH BUILT-IN DEPOLARIZATION DEVICE
Publication/Patent Number: US2020150291A1 Publication Date: 2020-05-14 Application Number: 16/742,814 Filing Date: 2020-01-14 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: G01T1/24 Abstract: Disclosed herein is a radiation detector configured to absorb radiation particles incident on a semiconductor single crystal of the radiation detector and to generate positive charge carriers and negative charge carriers in the semiconductor single crystal. The semiconductor single crystal may be a cadmium zinc telluride (CdZnTe) single crystal or a cadmium telluride (CdTe) single crystal. The radiation detector comprises a first electrical contact in electrical contact with the semiconductor single crystal and a second electrical contact surrounding the first electrical contact or the semiconductor single crystal. The first electrical contact is configured to collect the negative charge carriers. The second electrical contact is configured to cause the positive charge carriers to drift out of the semiconductor single crystal.
4 WO2020010590A1
IMAGE SENSORS WITH SILVER-NANOPARTICLE ELECTRODES
Publication/Patent Number: WO2020010590A1 Publication Date: 2020-01-16 Application Number: 2018095523 Filing Date: 2018-07-12 Inventor: Liu, Yurun   Cao, Peiyan   Assignee: Shenzhen xpectvision technology co ltd   IPC: H01L31/107 Abstract: An apparatus comprising: an array of avalanche photodiodes (APDs) (350) or an absorption region (210, 310) comprising a semiconductor single crystal (406) such as a CdZnTe single crystal or a CdTe single crystal. The apparatus may be configured to absorb radiation particles incident on an absorption region (210, 310) of the APDs (350) or the semiconductor single crystal (406) and to generate charge carriers. The apparatus may comprise an electrode (301, 304, 419A, 419B, 501) comprising silver nanoparticles (322, 422, 522) and being electrically connected to the absorption region (210, 310) of the APDs (350) or the semiconductor single crystal (406). For the APDs (350), each of the APDs (350) may comprise an amplification region (220,320), which may comprise a junction (315) with an electric field in the junction (315). The electric field may be at a value sufficient to cause an avalanche of charge carriers entering the amplification region (220,320), but not sufficient to make the avalanche self-sustaining. The junctions (315) of the APDs (350) may be discrete.
5 US10677940B2
Packaging of semiconductor X-ray detectors
Publication/Patent Number: US10677940B2 Publication Date: 2020-06-09 Application Number: 16/170,518 Filing Date: 2018-10-25 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: G01T1/16 Abstract: Disclosed herein is an image sensor comprising: a plurality of packages arranged in a plurality of layers; wherein each of the packages comprises an X-ray detector mounted on a printed circuit board (PCB); wherein the packages are mounted on one or more system PCBs; wherein within an area encompassing a plurality of the X-ray detectors in the plurality of packages, a dead zone of the packages in each of the plurality of layers is shadowed by the packages in the other layers.
6 US10641911B2
Packaging methods of semiconductor X-ray detectors
Publication/Patent Number: US10641911B2 Publication Date: 2020-05-05 Application Number: 15/737,802 Filing Date: 2015-12-02 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: H01L27/146 Abstract: Disclosed herein is a method for making an apparatus suitable for detecting X-ray, the method comprising: bonding a plurality of chips to a substrate; wherein the substrate comprises an X-ray absorption layer comprising a first plurality of electrical contacts; wherein each of the plurality of chips comprises an electronic layer comprising a second plurality of electrical contacts and an electronic system configured to process or interpret signals generated by X-ray photons incident on the X-ray absorption layer; aligning the first plurality of electrical contacts to the second plurality of electrical contacts; mounting the chips to the substrate such that the first plurality of electrical contacts are electrically connected to the second plurality of electrical contacts; wherein the second plurality of electrical contacts are configured to feed the signals to the electronic system.
7 US2020249363A1
X-RAY DETECTOR WITH A COOLING SYSTEM
Publication/Patent Number: US2020249363A1 Publication Date: 2020-08-06 Application Number: 16/852,854 Filing Date: 2020-04-20 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: G01T1/24 Abstract: Disclosed herein is a system suitable for X-ray detection. The system comprises a detector and cooling system configured to control temperature of the detector and prevent condensation of water vapor on the detector. The detector comprises an X-ray absorption layer and electronics layer. The X-ray absorption layer comprises a plurality of pixels, each pixel configured to count numbers of X-ray photons incident thereon whose energy falls in a plurality of bins, within a period of time. The electronics layer comprises an electronic system configured to add the numbers of X-ray photons for the bins of the same energy range counted by all the pixels. The cooling system comprises a chiller configured to lower temperature and moisture level of air, and a fan configured to blow the air that is cooled and dried to the detector.
8 US2020249367A1
IMAGE SENSOR BASED ON CHARGE CARRIER AVALANCHE
Publication/Patent Number: US2020249367A1 Publication Date: 2020-08-06 Application Number: 16/854,035 Filing Date: 2020-04-21 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: G01T1/24 Abstract: Disclosed herein is an apparatus suitable for radiation detection. The apparatus may comprise a radiation absorption layer and a first electrode on the radiation absorption layer. The radiation absorption layer may be configured to generate charge carriers therein from a radiation particle absorbed by the radiation absorption layer. The first electrode may be configured to generate an electric field in the radiation absorption layer. The firs electrode may have a geometry shaping the electric field so that the electric field in an amplification region of the radiation absorption layer has a field strength sufficient to cause an avalanche of the charge carriers in the amplification region.
9 US2020249364A1
DETECTOR FOR X-RAY FLUORESCENCE
Publication/Patent Number: US2020249364A1 Publication Date: 2020-08-06 Application Number: 16/852,781 Filing Date: 2020-04-20 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: G01T1/24 Abstract: Disclosed herein is a detector, comprising: a plurality of pixels, each pixel configured to count numbers of X-ray photons incident thereon whose energy falls in a plurality of bins, within a period of time; an X-ray absorption layer; wherein the X-ray absorption layer comprises an electrical contact within each of the pixels, and a focusing electrode surrounding the electrical contact and configured to direct to the electrical contact charge carriers generated by an X-ray photon incident within confines of the focusing electrodes; and wherein the detector is configured to add the numbers of X-ray photons for the bins of the same energy range counted by all the pixels.
10 US2020150288A1
X-RAY IMAGING SYSTEM AND METHOD OF X-RAY IMAGE TRACKING
Publication/Patent Number: US2020150288A1 Publication Date: 2020-05-14 Application Number: 16/742,791 Filing Date: 2020-01-14 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: G01T1/20 Abstract: Disclosed herein is a method for image tracking using an X-ray imaging system during an interventional radiology procedure on a human or animal. The method may comprise acquiring a first image of an object inside a human or animal with a first X-ray detector of the X-ray imaging system; acquiring a second image of the object with the X-ray imaging system during the interventional radiology procedure, at a time later than acquiring the first image; determining a displacement of the first X-ray detector based on the first image and the second image; moving the first X-ray detector by the displacement, with an actuator of the X-ray imaging system. The X-ray imaging system comprises the first X-ray detector, the second X-ray detector and the actuator. A spatial resolution of the first X-ray detector is higher than a spatial resolution of the second X-ray detector.
11 US2020163194A1
SYSTEM WITH A SPATIALLY EXPANSIVE X-RAY SOURCE FOR X-RAY IMAGING
Publication/Patent Number: US2020163194A1 Publication Date: 2020-05-21 Application Number: 16/742,758 Filing Date: 2020-01-14 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: H05G1/02 Abstract: Disclosed herein is a system, comprising: a first X-ray source comprising a plurality of X-ray generators configured to respectively emit a plurality of X-rays toward an object; and a first X-ray detector configured to detect images of the object formed respectively by the plurality of X-rays from the first X-ray source.
12 US2020086411A1
BONDING MATERIALS OF DISSIMILAR COEFFICIENTS OF THERMAL EXPANSION
Publication/Patent Number: US2020086411A1 Publication Date: 2020-03-19 Application Number: 16/690,770 Filing Date: 2019-11-21 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: B23K1/00 Abstract: Disclosed herein is an X-ray detector comprises: an X-ray absorption layer configured to absorb X-ray photons; an electronics layer comprising an electronics system configured to process or interpret signals generated by the X-ray photons incident on the X-ray absorption layer; and a temperature driver in the X-ray absorption layer or the electronics layer.
13 US2020152820A1
RADIATION DETECTOR AND A METHOD OF MAKING IT
Publication/Patent Number: US2020152820A1 Publication Date: 2020-05-14 Application Number: 16/742,803 Filing Date: 2020-01-14 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: H01L31/18 Abstract: Disclosed herein are a radiation detector and a method of making it. The radiation detector is configured to absorb radiation particles incident on a semiconductor single crystal of the radiation detector and to generate charge carriers.. The semiconductor single crystal may be a CdZnTe single crystal or a CdTe single crystal. The method may comprise forming a recess into a substrate of semiconductor; forming a semiconductor single crystal in the recess; and forming a heavily doped semiconductor region in the substrate. The semiconductor single crystal has a different composition from the substrate. The heavily doped region is in electrical contact with the semiconductor single crystal and embedded in a portion of intrinsic semiconductor of the substrate.
14 US2020161075A1
INTEGRATED X-RAY SOURCE
Publication/Patent Number: US2020161075A1 Publication Date: 2020-05-21 Application Number: 16/742,733 Filing Date: 2020-01-14 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: H01J35/06 Abstract: Disclosed herein is an X-ray source, comprising: a cathode in a recess of a first substrate; a counter electrode on a sidewall of the recess, configured to cause field emission of electrons from the cathode; and a metal anode configured to receive the electrons emitted from the cathode and to emit X-ray from impact by the electrons on the metal anode.
15 US2020249366A1
RADIATION DETECTOR CAPABLE OF NOISE HANDLING
Publication/Patent Number: US2020249366A1 Publication Date: 2020-08-06 Application Number: 16/852,822 Filing Date: 2020-04-20 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: G01T1/24 Abstract: Disclosed herein is a radiation detector, comprising: an avalanche photodiode (APD) with a first side coupled to an electrode and configured to work in a linear mode; a capacitor module electrically connected to the electrode and comprising a capacitor, wherein the capacitor module is configured to collect charge carriers from the electrode onto the capacitor; a current sourcing module in parallel to the capacitor, the current sourcing module configured to compensate for a leakage current in the APD and comprising a current source and a modulator; wherein the current source is configured to output a first electrical current and a second electrical current; wherein the modulator is configured to control a ratio of a duration at which the current source outputs the first electrical current to a duration at which the current source outputs the second electrical current.
16 US2020119080A1
Methods of Making Semiconductor X-Ray Detector
Publication/Patent Number: US2020119080A1 Publication Date: 2020-04-16 Application Number: 16/709,723 Filing Date: 2019-12-10 Inventor: Cao, Peiyan   Song, Chongshen   Liu, Yurun   Assignee: Shenzhen xpectvision technology co ltd   IPC: H01L27/146 Abstract: Disclosed herein is an image sensor and a method of making the image sensor. The image sensor may comprise one or more packages of semiconductor radiation detectors. Each of the one or more packages may comprise a radiation detector that comprises a radiation absorption layer on a first strip of semiconductor wafer and an electronics layer on a second strip of semiconductor wafer. The radiation absorption layer may be continuous along the first strip of semiconductor wafer with no coverage gap. The first strip and the second strip may be longitudinally aligned and bonded together. The radiation detector may be mounted on a printed circuit board (PCB) and electrically connected to the PCB close to an edge of the radiation detector.