Patents by Inventor Keitaro Hitomi
Keitaro Hitomi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11555934Abstract: The present embodiment relates to a radiation detector having a structure enabling suppression of polarization in a thallium bromide crystalline body and suppression of corrosion of an electrode in the air. The radiation detector comprises a first electrode, a second electrode, and a thallium bromide crystalline body provided between the first and second electrodes. One of the first and the second electrodes includes an alloy layer and a low-resistance metal layer provide on the alloy layer. The alloy layer is comprised of an alloy of metallic thallium and another metal different from the metallic thallium. The low-resistance metal layer has a resistance value lower than a resistance value of the alloy layer and is electrically connected to a pad on a readout circuit while the radiation detector is mounted on the readout circuit.Type: GrantFiled: February 23, 2022Date of Patent: January 17, 2023Assignee: HAMAMATSU PHOTONICS K.K.Inventors: Masanori Kinpara, Toshiyuki Onodera, Keitaro Hitomi
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Publication number: 20220179107Abstract: The present embodiment relates to a radiation detector having a structure enabling suppression of polarization in a thallium bromide crystalline body and suppression of corrosion of an electrode in the air. The radiation detector comprises a first electrode, a second electrode, and a thallium bromide crystalline body provided between the first and second electrodes. One of the first and the second electrodes includes an alloy layer and a low-resistance metal layer provide on the alloy layer. The alloy layer is comprised of an alloy of metallic thallium and another metal different from the metallic thallium. The low-resistance metal layer has a resistance value lower than a resistance value of the alloy layer and is electrically connected to a pad on a readout circuit while the radiation detector is mounted on the readout circuit.Type: ApplicationFiled: February 23, 2022Publication date: June 9, 2022Applicant: HAMAMATSU PHOTONICS K.K.Inventors: Masanori KINPARA, Toshiyuki ONODERA, Keitaro HITOMI
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Patent number: 11307315Abstract: The present embodiment relates to a radiation detector having a structure enabling suppression of polarization in a thallium bromide crystalline body and suppression of corrosion of an electrode in the air. The radiation detector comprises a first electrode, a second electrode, and a thallium bromide crystalline body provided between the first and second electrodes. One of the first and the second electrodes includes an alloy layer and a low-resistance metal layer provide on the alloy layer. The alloy layer is comprised of an alloy of metallic thallium and another metal different from the metallic thallium. The low-resistance metal layer has a resistance value lower than a resistance value of the alloy layer and is electrically connected to a pad on a readout circuit while the radiation detector is mounted on the readout circuit.Type: GrantFiled: October 12, 2020Date of Patent: April 19, 2022Assignee: HAMAMATSU PHOTONICS K.K.Inventors: Masanori Kinpara, Toshiyuki Onodera, Keitaro Hitomi
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Publication number: 20210041585Abstract: The present embodiment relates to a radiation detector having a structure enabling suppression of polarization in a thallium bromide crystalline body and suppression of corrosion of an electrode in the air. The radiation detector comprises a first electrode, a second electrode, and a thallium bromide crystalline body provided between the first and second electrodes. One of the first and the second electrodes includes an alloy layer and a low-resistance metal layer provide on the alloy layer. The alloy layer is comprised of an alloy of metallic thallium and another metal different from the metallic thallium. The low-resistance metal layer has a resistance value lower than a resistance value of the alloy layer and is electrically connected to a pad on a readout circuit while the radiation detector is mounted on the readout circuit.Type: ApplicationFiled: October 12, 2020Publication date: February 11, 2021Applicant: HAMAMATSU PHOTONICS K.K.Inventors: Masanori KINPARA, Toshiyuki Onodera, Keitaro Hitomi
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Patent number: 10859717Abstract: The present embodiment relates to a radiation detector having a structure enabling suppression of polarization in a thallium bromide crystalline body and suppression of corrosion of an electrode in the air. The radiation detector comprises a first electrode, a second electrode, and a thallium bromide crystalline body provided between the first and second electrodes. One of the first and the second electrodes includes an alloy layer and a low-resistance metal layer provide on the alloy layer. The alloy layer is comprised of an alloy of metallic thallium and another metal different from the metallic thallium. The low-resistance metal layer has a resistance value lower than a resistance value of the alloy layer and is electrically connected to a pad on a readout circuit while the radiation detector is mounted on the readout circuit.Type: GrantFiled: May 5, 2020Date of Patent: December 8, 2020Assignee: HAMAMATSU PHOTONICS K.K.Inventors: Masanori Kinpara, Toshiyuki Onodera, Keitaro Hitomi
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Patent number: 10782427Abstract: A radiation detector has a structure enabling suppression of polarization in a thallium bromide crystalline body and suppression of corrosion of an electrode in the air. The radiation detector comprises a first electrode, a second electrode, and a thallium bromide crystalline body provided between the first and second electrodes. At least one of the first electrode and the second electrode includes an alloy layer. The alloy layer is comprised of an alloy of metallic thallium and another metal different from the metallic thallium.Type: GrantFiled: June 19, 2017Date of Patent: September 22, 2020Assignee: HAMAMATSU PHOTONIX K.K.Inventors: Masanori Kinpara, Toshiyuki Onodera, Keitaro Hitomi
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Publication number: 20200264324Abstract: The present embodiment relates to a radiation detector having a structure enabling suppression of polarization in a thallium bromide crystalline body and suppression of corrosion of an electrode in the air. The radiation detector comprises a first electrode, a second electrode, and a thallium bromide crystalline body provided between the first and second electrodes. One of the first and the second electrodes includes an alloy layer and a low-resistance metal layer provide on the alloy layer. The alloy layer is comprised of an alloy of metallic thallium and another metal different from the metallic thallium. The low-resistance metal layer has a resistance value lower than a resistance value of the alloy layer and is electrically connected to a pad on a readout circuit while the radiation detector is mounted on the readout circuit.Type: ApplicationFiled: May 5, 2020Publication date: August 20, 2020Applicant: HAMAMATSU PHOTONICS K.K.Inventors: Masanori KINPARA, Toshiyuki ONODERA, Keitaro HITOMI
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Publication number: 20190346576Abstract: The present embodiment relates to a radiation detector having a structure enabling suppression of polarization in a thallium bromide crystalline body and suppression of corrosion of an electrode in the air. The radiation detector comprises a first electrode, a second electrode, and a thallium bromide crystalline body provided between the first and second electrodes. At least one of the first electrode and the second electrode includes an alloy layer 12. The alloy layer is comprised of an alloy of metallic thallium and another metal different from the metallic thallium.Type: ApplicationFiled: June 19, 2017Publication date: November 14, 2019Applicant: HAMAMATSU PHOTONICS K.K.Inventors: Masanori KINPARA, Toshiyuki ONODERA, Keitaro HITOMI
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Patent number: 7157716Abstract: The present invention provides a semiconductor radiation detector and radiation detection apparatus capable of improving energy resolution and the semiconductor radiation detection apparatus includes a semiconductor radiation detector and a signal processing circuit which processes a radiation detection signal output from the semiconductor radiation detector. The semiconductor radiation detector is provided with anode electrodes A and cathode electrodes C disposed so as to face each other with semiconductor radiation detection elements placed in-between. The semiconductor radiation detection element is made up of a single crystal of thallous bromide containing trivalent thallium (e.g., tribromobis thallium). The semiconductor radiation detector containing such a semiconductor radiation detection element reduces lattice defects in the single crystal and thereby increases charge collection efficiency.Type: GrantFiled: January 31, 2005Date of Patent: January 2, 2007Assignee: Hitachi, Ltd.Inventors: Hiroshi Kitaguchi, Kensuke Amemiya, Kazuma Yokoi, Yuuichirou Ueno, Katsutoshi Tsuchiya, Norihito Yanagita, Shinichi Kojima, Keitaro Hitomi, Tadayoshi Shoji
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Publication number: 20060065847Abstract: The present invention provides a semiconductor radiation detector and radiation detection apparatus capable of improving energy resolution and the semiconductor radiation detection apparatus includes a semiconductor radiation detector and a signal processing circuit which processes a radiation detection signal output from the semiconductor radiation detector. The semiconductor radiation detector is provided with anode electrodes A and cathode electrodes C disposed so as to face each other with semiconductor radiation detection elements placed in-between. The semiconductor radiation detection element is made up of a single crystal of thallous bromide containing trivalent thallium (e.g., tribromobis thallium). The semiconductor radiation detector containing such a semiconductor radiation detection element reduces lattice defects in the single crystal and thereby increases charge collection efficiency.Type: ApplicationFiled: January 31, 2005Publication date: March 30, 2006Inventors: Hiroshi Kitaguchi, Kensuke Amemiya, Kazuma Yokoi, Yuuichirou Ueno, Katsutoshi Tsuchiya, Norihito Yanagita, Shinichi Kojima, Keitaro Hitomi, Tadayoshi Shoji