Patents by Inventor Keiichi Akamatsu
Keiichi Akamatsu 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: 11802981Abstract: A method of manufacturing a radiation detector includes: forming a substrate in which a flexible base material is provided via a peeling layer on a support body and plural pixels that accumulate electric charges generated in response to light converted from radiation are provided in a pixel region of the base material; forming a conversion layer for converting the radiation into light on a surface of the base material; providing a first reinforcing substrate on a surface of the conversion layer opposite to a surface on the substrate side; peeling the substrate provided with the conversion layer and the first reinforcing substrate from the support body; providing a second reinforcing substrate on a surface of the substrate peeled from the support body; and peeling the first reinforcing substrate from the substrate provided with the conversion layer after providing the second reinforcing substrate.Type: GrantFiled: August 5, 2021Date of Patent: October 31, 2023Assignee: FUJIFILM CORPORATIONInventors: Shinichi Ushikura, Munetaka Kato, Keiichi Akamatsu, Haruyasu Nakatsugawa
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Patent number: 11786194Abstract: A radiation detector including: a substrate formed with plural pixels that accumulate electrical charges generated in response to light converted from radiation in a pixel region at an opposite-side surface of a base member to a surface including a fine particle layer; the base member being flexible and is made of resin and that includes a fine particle layer containing inorganic fine particles having a mean particle size of from 0.05 ?m to 2.5 ?m, a conversion layer provided at the surface of the base member provided with the pixel region and configured to convert the radiation into light; and a reinforcement substrate provided to at least one out of a surface on the substrate side of a stacked body configured by stacking the substrate and the conversion layer, or a surface on the conversion layer side of the stacked body.Type: GrantFiled: September 18, 2020Date of Patent: October 17, 2023Assignee: FUJIFILM CorporationInventors: Yoshihiro Okada, Keiichi Akamatsu, Shinichi Ushikura, Munetaka Kato, Haruyasu Nakatsugawa
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Patent number: 11735622Abstract: A radiographic imaging apparatus including: a sensor substrate in which pixels are formed in a first surface of a base material; a conversion layer provided on the first surface; a signal processing substrate provided on one side the sensor substrate and includes at least a part of a signal processing unit; a driving substrate provided on the one side or the other side of the sensor substrate and includes at least a part of a drive unit; a first cable of which one end is connected to the sensor substrate and the other end is electrically connected to the signal processing substrate; and a second cable of which one end is connected to the sensor substrate, and passes through the first surface side or a second surface side of the base material and the other end is connected to the driving substrate.Type: GrantFiled: September 27, 2021Date of Patent: August 22, 2023Assignee: FUJIFILM CORPORATIONInventors: Shinichi Ushikura, Naoto Iwakiri, Keiichi Akamatsu
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Patent number: 11630221Abstract: A radiation detector including: a substrate formed with a plural pixels in pixel region of a flexible base member, the plural pixels accumulates charges generated in response to light converted from radiation; a conversion layer provided at a surface to which the pixel region is provided on the base member, the conversion layer converts the radiation into light; and a reinforcement substrate provided at a surface of the conversion layer that faces a surface of the substrate side, the reinforcement substrate contains a material having a yield point and has a higher rigidity than the base member.Type: GrantFiled: September 18, 2020Date of Patent: April 18, 2023Assignee: FUJIFILM CorporationInventors: Munetaka Kato, Shinichi Ushikura, Yoshihiro Okada, Keiichi Akamatsu, Haruyasu Nakatsugawa
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Patent number: 11624716Abstract: A radiation detector including: a sensor substrate including a flexible base member and a layer provided on a first surface of the base member and formed with plural pixels that accumulates electrical charge generated in response to light converted from radiation; a conversion layer provided on the first surface side of the sensor substrate, the conversion layer converts radiation into the light; and an elastic layer provided on the opposite side of the conversion layer to a side provided with the sensor substrate, the elastic layer having a greater restoring force with respect to bending than the sensor substrate.Type: GrantFiled: September 18, 2020Date of Patent: April 11, 2023Assignee: FUJIFILM CorporationInventors: Shinichi Ushikura, Munetaka Kato, Haruyasu Nakatsugawa, Keiichi Akamatsu
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Patent number: 11609347Abstract: A radiation detector includes a flexible substrate, plural pixels provided on the substrate and each including a photoelectric conversion element, a scintillator stacked on the substrate, and a bending suppression member configured to suppress bending of the substrate. The bending suppression member has a rigidity that satisfies R?X2/2ZL wherein X is a pixel size, ZL is a critical deformation amount of the pixel through bending of the substrate, and R is a radius of curvature of bending occurring in the substrate due to the weight of the scintillator.Type: GrantFiled: September 11, 2020Date of Patent: March 21, 2023Assignee: FUJIFILM CorporationInventors: Naoto Iwakiri, Munetaka Kato, Haruyasu Nakatsugawa, Keiichi Akamatsu
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Patent number: 11428827Abstract: Provided are a radiation detector, a radiographic imaging apparatus, and a manufacturing method that include a TFT substrate in which a plurality of pixels that accumulate electric charges generated depending on light converted from radiation are formed in a pixel region of a first surface of a flexible base material and a terminal region of the first surface is provided with a terminal for electrically connecting a flexible cable; a conversion layer that is provided outside the terminal region on the first surface of the base material to convert the radiation into light; a first reinforcing substrate that is provided on a surface of the conversion layer opposite to a surface on a TFT substrate side and has a higher stiffness than the base material; and a second reinforcing substrate that is provided on a second surface of the base material opposite to the first surface to cover a surface larger than the first reinforcing substrate, and that are capable of suppressing that a defect occurs in the substrate andType: GrantFiled: May 14, 2021Date of Patent: August 30, 2022Assignee: FUJIFILM CORPORATIONInventors: Shinichi Ushikura, Munetaka Kato, Keiichi Akamatsu, Haruyasu Nakatsugawa
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Publication number: 20220102399Abstract: A method of manufacturing a radiographic imaging apparatus, including: providing a flexible base material on a support body and forming a substrate in which pixels are provided in a pixel region of a first surface of the base material; providing a terminal portion for connecting a cable on the first surface; connecting a circuit board for reading the electric charges from the pixels or driving the pixels to the terminal portion via the cable; peeling the substrate from the support body; and using a transport jig including a suction unit having suction members and a holding part having a holding member, to suction and support the first surface or a second surface opposite to the first surface with the suction members, and transporting the substrate peeled from the support body in a state where the circuit board is held by the holding member.Type: ApplicationFiled: September 21, 2021Publication date: March 31, 2022Inventors: Shinichi USHIKURA, Hisao FUJIWARA, Tatsunori TANIMOTO, Keiichi AKAMATSU
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Patent number: 11262461Abstract: A radiation detector includes a sensor substrate, a conversion layer, and a neutral stress plane adjustment member. The sensor substrate includes a flexible base member, and a layer provided on a first surface of the base member and formed with plural pixels configured to accumulate electrical charge generated in response to light converted from radiation. The conversion layer is provided on the opposite side of the layer formed with the plural pixels to the side where the base member is provided and is configured to convert radiation into the light. The neutral stress plane adjustment member is provided on a second surface side of the base member on the opposite side of the base member to the first surface and is configured to adjust a position of a neutral stress plane to within a predetermined range in a stacking direction.Type: GrantFiled: September 10, 2020Date of Patent: March 1, 2022Assignee: FUJIFILM CorporationInventors: Shinichi Ushikura, Haruyasu Nakatsugawa, Keiichi Akamatsu
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Publication number: 20220013572Abstract: A radiographic imaging apparatus including: a sensor substrate in which pixels are formed in a first surface of a base material; a conversion layer provided on the first surface; a signal processing substrate provided on one side the sensor substrate and includes at least a part of a signal processing unit; a driving substrate provided on the one side or the other side of the sensor substrate and includes at least a part of a drive unit; a first cable of which one end is connected to the sensor substrate and the other end is electrically connected to the signal processing substrate; and a second cable of which one end is connected to the sensor substrate, and passes through the first surface side or a second surface side of the base material and the other end is connected to the driving substrate.Type: ApplicationFiled: September 27, 2021Publication date: January 13, 2022Inventors: Shinichi USHIKURA, Naoto IWAKIRI, Keiichi AKAMATSU
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Publication number: 20210364658Abstract: A method of manufacturing a radiation detector includes: forming a substrate in which a flexible base material is provided via a peeling layer on a support body and plural pixels that accumulate electric charges generated in response to light converted from radiation are provided in a pixel region of the base material; forming a conversion layer for converting the radiation into light on a surface of the base material; providing a first reinforcing substrate on a surface of the conversion layer opposite to a surface on the substrate side; peeling the substrate provided with the conversion layer and the first reinforcing substrate from the support body; providing a second reinforcing substrate on a surface of the substrate peeled from the support body; and peeling the first reinforcing substrate from the substrate provided with the conversion layer after providing the second reinforcing substrate.Type: ApplicationFiled: August 5, 2021Publication date: November 25, 2021Inventors: Shinichi USHIKURA, Munetaka KATO, Keiichi AKAMATSU, Haruyasu NAKATSUGAWA
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Publication number: 20210333421Abstract: Provided are a radiation detector, a radiographic imaging apparatus, and a manufacturing method that include a TFT substrate in which a plurality of pixels that accumulate electric charges generated depending on light converted from radiation are formed in a pixel region of a first surface of a flexible base material and a terminal region of the first surface is provided with a terminal for electrically connecting a flexible cable; a conversion layer that is provided outside the terminal region on the first surface of the base material to convert the radiation into light; a first reinforcing substrate that is provided on a surface of the conversion layer opposite to a surface on a TFT substrate side and has a higher stiffness than the base material; and a second reinforcing substrate that is provided on a second surface of the base material opposite to the first surface to cover a surface larger than the first reinforcing substrate, and that are capable of suppressing that a defect occurs in the substrate andType: ApplicationFiled: May 14, 2021Publication date: October 28, 2021Inventors: Shinichi USHIKURA, Munetaka KATO, Keiichi AKAMATSU, Haruyasu NAKATSUGAWA
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Patent number: 10989818Abstract: A radiation detector includes: a sensor substrate including a flexible base material and a layer which is provided on a first surface of the base material and in which plural pixels, which accumulate electrical charges generated in accordance with light converted from radiation, are formed; a conversion layer that is provided on the first surface side of the sensor substrate to convert radiation into the light; and a protective film that covers a portion ranging from an opposite surface of the conversion layer opposite to a side where the sensor substrate is provided, to a corresponding position, corresponding to a position of an end part of the conversion layer, on a second surface opposite to the first surface of the base material.Type: GrantFiled: March 29, 2019Date of Patent: April 27, 2021Assignee: FUJIFILM CorporationInventors: Shinichi Ushikura, Keiichi Akamatsu, Haruyasu Nakatsugawa, Shunsuke Kodaira
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Publication number: 20210096271Abstract: A radiation detector including: a substrate formed with plural pixels that accumulate electrical charges generated in response to light converted from radiation in a pixel region at an opposite-side surface of a base member to a surface including a fine particle layer; the base member being flexible and is made of resin and that includes a fine particle layer containing inorganic fine particles having a mean particle size of from 0.05 ?m to 2.5 ?m, a conversion layer provided at the surface of the base member provided with the pixel region and configured to convert the radiation into light; and a reinforcement substrate provided to at least one out of a surface on the substrate side of a stacked body configured by stacking the substrate and the conversion layer, or a surface on the conversion layer side of the stacked body.Type: ApplicationFiled: September 18, 2020Publication date: April 1, 2021Applicant: FUJIFILM CorporationInventors: Yoshihiro OKADA, Keiichi AKAMATSU, Shinichi USHIKURA, Munetaka KATO, Haruyasu NAKATSUGAWA
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Publication number: 20210003515Abstract: A radiation detector including: a sensor substrate including a flexible base member and a layer provided on a first surface of the base member and formed with plural pixels that accumulates electrical charge generated in response to light converted from radiation; a conversion layer provided on the first surface side of the sensor substrate, the conversion layer converts radiation into the light; and an elastic layer provided on the opposite side of the conversion layer to a side provided with the sensor substrate, the elastic layer having a greater restoring force with respect to bending than the sensor substrate.Type: ApplicationFiled: September 18, 2020Publication date: January 7, 2021Applicant: FUJIFILM CorporationInventors: Shinichi USHIKURA, Munetaka KATO, Haruyasu NAKATSUGAWA, Keiichi AKAMATSU
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Publication number: 20210003722Abstract: A radiation detector including: a substrate formed with a plural pixels in pixel region of a flexible base member, the plural pixels accumulates charges generated in response to light converted from radiation; a conversion layer provided at a surface to which the pixel region is provided on the base member, the conversion layer converts the radiation into light; and a reinforcement substrate provided at a surface of the conversion layer that faces a surface of the substrate side, the reinforcement substrate contains a material having a yield point and has a higher rigidity than the base member.Type: ApplicationFiled: September 18, 2020Publication date: January 7, 2021Applicant: FUJIFILM CorporationInventors: Munetaka KATO, Shinichi USHIKURA, Yoshihiro OKADA, Keiichi AKAMATSU, Haruyasu NAKATSUGAWA
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Publication number: 20200408930Abstract: A radiation detector includes a sensor substrate, a conversion layer, and a neutral stress plane adjustment member. The sensor substrate includes a flexible base member, and a layer provided on a first surface of the base member and formed with plural pixels configured to accumulate electrical charge generated in response to light converted from radiation. The conversion layer is provided on the opposite side of the layer formed with the plural pixels to the side where the base member is provided and is configured to convert radiation into the light. The neutral stress plane adjustment member is provided on a second surface side of the base member on the opposite side of the base member to the first surface and is configured to adjust a position of a neutral stress plane to within a predetermined range in a stacking direction.Type: ApplicationFiled: September 10, 2020Publication date: December 31, 2020Applicant: FUJIFILM CorporationInventors: Shinichi USHIKURA, Haruyasu NAKATSUGAWA, Keiichi AKAMATSU
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Publication number: 20200408935Abstract: A radiation detector includes a flexible substrate, plural pixels provided on the substrate and each including a photoelectric conversion element, a scintillator stacked on the substrate, and a bending suppression member configured to suppress bending of the substrate. The bending suppression member has a rigidity that satisfies R?X2/2ZL wherein X is a pixel size, ZL is a critical deformation amount of the pixel through bending of the substrate, and R is a radius of curvature of bending occurring in the substrate due to the weight of the scintillator.Type: ApplicationFiled: September 11, 2020Publication date: December 31, 2020Applicant: FUJIFILM CorporationInventors: Naoto IWAKIRI, Munetaka KATO, Haruyasu NAKATSUGAWA, Keiichi AKAMATSU
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Patent number: 10838082Abstract: The radiation detector includes: a sensor board including a flexible substrate and a layer which is provided on a first surface of the substrate and in which a plurality of pixels, which accumulate electrical charges generated in accordance with light converted from radiation, are formed; a conversion layer that is provided on a side, opposite to the substrate, of the layer in which the pixels are formed, and converts radiation into light; protective film that covers at least the conversion layer; a reinforcing member provided on a second surface opposite to the first surface of the substrate; and a supporting member that supports the reinforcing member with the reinforcing member sandwiched between the supporting member and the second surface of the substrate.Type: GrantFiled: July 3, 2018Date of Patent: November 17, 2020Assignee: FUJIFILM CORPORATIONInventors: Shinichi Ushikura, Keiichi Akamatsu, Haruyasu Nakatsugawa, Naoyuki Nishinou, Shunsuke Kodaira
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Patent number: 10534098Abstract: A radiographic imaging apparatus includes a sensor board including a flexible substrate, and a plurality of pixels that are provided on a first surface of the substrate to accumulate electrical charges generated in accordance with light converted from radiation. Additionally, the radiographic imaging apparatus includes flexible cables having one ends electrically connected to the sensor board and the other ends provided with connectors, and flexible cables on which signal processing circuit parts are mounted and which are connected electrically to the cables by the one ends thereof being electrically connected to the connectors. Additionally, the radiographic imaging apparatus includes flexible cables having one ends electrically connected to the sensor board and the other ends provided with connectors, and flexible cables on which drive circuit parts are mounted and which are connected electrically to the cables by the one ends thereof being electrically connected to the connectors.Type: GrantFiled: February 7, 2018Date of Patent: January 14, 2020Assignee: FUJIFILM CorporationInventors: Keiichi Akamatsu, Shinichi Ushikura, Takeya Meguro, Haruyasu Nakatsugawa