Patents by Inventor Hiroichi Ukei
Hiroichi Ukei 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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Publication number: 20230356500Abstract: An electromagnetic wave absorber (1) includes a dielectric layer (10), a resistive layer (20), and an electrically conductive layer (30). The resistive layer (20) is disposed on one principal surface of the dielectric layer (10). The electrically conductive layer (30) is disposed on the other principal surface of the dielectric layer (10) and has a sheet resistance lower than a sheet resistance of the resistive layer (20). The resistive layer (20) has a sheet resistance of 200 to 600 ?/?. When the resistive layer (20) is subjected to an immersion treatment in which the resistive layer (20) is immersed in a 5 weight % aqueous solution of NaOH for 5 minutes, an absolute value of a difference between a sheet resistance of the resistive layer (20) before the immersion treatment and a sheet resistance of the resistive layer (20) after the immersion treatment is less than 100 ?/?.Type: ApplicationFiled: July 21, 2023Publication date: November 9, 2023Applicant: NITTO DENKO CORPORATIONInventors: Kazuto Yamagata, Hironobu Machinaga, Eri Ueda, Hiroichi Ukei, Takehiro Ui
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Patent number: 11806980Abstract: An electromagnetic wave absorber (1) includes a dielectric layer (10), a resistive layer (20), and an electrically conductive layer (30). The resistive layer (20) is disposed on one principal surface of the dielectric layer (10). The electrically conductive layer (30) is disposed on the other principal surface of the dielectric layer (10) and has a sheet resistance lower than a sheet resistance of the resistive layer (20). The resistive layer (20) has a sheet resistance of 200 to 600?/?. When the resistive layer (20) is subjected to an immersion treatment in which the resistive layer (20) is immersed in a 5 weight % aqueous solution of NaOH for 5 minutes, an absolute value of a difference between a sheet resistance of the resistive layer (20) before the immersion treatment and a sheet resistance of the resistive layer (20) after the immersion treatment is less than 100?/?.Type: GrantFiled: March 27, 2018Date of Patent: November 7, 2023Assignee: NITTO DENKO CORPORATIONInventors: Kazuto Yamagata, Hironobu Machinaga, Eri Ueda, Hiroichi Ukei, Takehiro Ui
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Patent number: 11622482Abstract: An electromagnetic wave absorber (1) includes a dielectric layer (10), a resistive layer (20), and an electrically conductive layer (30). The resistive layer (20) is disposed on one principal surface of the dielectric layer (10). The electrically conductive layer (30) is disposed on the other principal surface of the dielectric layer (10) and has a sheet resistance lower than a sheet resistance of the resistive layer (20). The resistive layer (20) is a layer that includes tin oxide or titanium oxide as a main component or a layer that is made of indium tin oxide including 40 weight % or more of tin oxide.Type: GrantFiled: March 27, 2018Date of Patent: April 4, 2023Assignee: NITTO DENKO CORPORATIONInventors: Kazuto Yamagata, Hironobu Machinaga, Yuuki Takeda, Hiroichi Ukei, Takehiro Ui
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Patent number: 11547031Abstract: An electromagnetic wave absorber includes an electromagnetic wave-absorbing layer (10) and an adhesive layer (20). The adhesive layer (20) is disposed on at least one surface of the electromagnetic wave-absorbing layer (10). The electromagnetic wave absorber is capable of being adhered to a surface having a step in such a manner that the adhesive layer (20) is in contact with the surface. The adhesive layer (20) has a thickness equal to or greater than a reference height determined by subtracting 0.1 mm from the height of the step. In the electromagnetic wave absorber, a return loss ?R defined by ?R=Rt?Rr is 15 dB or more. Rt is a reflection amount of a 76-GHz electromagnetic wave and is measured for a reference specimen. Rr is a reflection amount of a 76-GHz electromagnetic wave and is measured for a specimen obtained by adhering the electromagnetic wave absorber.Type: GrantFiled: June 12, 2018Date of Patent: January 3, 2023Assignee: NITTO DENKO CORPORATIONInventors: Takehiro Ui, Hiroichi Ukei
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Patent number: 11387566Abstract: An electromagnetic wave absorber (1a) includes a first layer (10) and an electrically conductive layer (20). The first layer (10) is a dielectric layer or a magnetic layer. The electrically conductive layer (20) is provided on at least one surface of the first layer. A product of a Young's modulus of the first layer (10) and a thickness of the first layer (10) is 0.1 to 1000 MPa·mm. The first layer (10) has a relative permittivity of 1 to 10.Type: GrantFiled: January 23, 2018Date of Patent: July 12, 2022Assignee: NITTO DENKO CORPORATIONInventors: Hiroichi Ukei, Takehiro Ui, Hironobu Machinaga, Kazuto Yamagata, Yuuki Takeda
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Patent number: 11331876Abstract: The present invention provides an electrically insulating resin composition comprising a polysulfone resin including a plurality of sulfonyl groups in the molecule and a polyamide resin, wherein the proportion of the polyamide resin is 1 to 45% by mass. The present invention also provides a laminate sheet obtained by bonding a plurality of sheet materials with a resin composition layer interposed therebetween, wherein the resin composition layer comprises a polysulfone resin including a plurality of sulfonyl groups in the molecule and a polyamide resin, and the proportion of the polyamide resin is 1 to 45% by mass.Type: GrantFiled: June 24, 2016Date of Patent: May 17, 2022Assignees: NITTO SHINKO CORPORATION, NITTO DENKO CORPORATIONInventors: Yasuyuki Kihara, Akira Tamai, Hiroichi Ukei, Tomoyuki Kasagi, Mizuki Yamamoto
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Patent number: 11266048Abstract: An electromagnetic wave absorber (1a) includes a resistive layer (10), an electrically conductive layer (20) and a dielectric layer (30). The electrically conductive layer (20) has a sheet resistance lower than a sheet resistance of the resistive layer (10). The dielectric layer (30) is disposed between the resistive layer (10) and the electrically conductive layer (20). The electromagnetic wave absorber (1a) has a first slit (15). The first slit (15) extends, in the resistive layer (10), from a first principal surface (10a) distal to the dielectric layer (30) toward the dielectric layer (30) in a direction perpendicular to the first principal surface (10a) and divides the resistive layer (10) into a plurality of first blocks (17). Each of the first blocks (17) has a minimum dimension (D1) of 2 mm or more at the first principal surface (10a).Type: GrantFiled: December 28, 2018Date of Patent: March 1, 2022Assignee: NITTO DENKO CORPORATIONInventors: Kazuto Yamagata, Hironobu Machinaga, Hiroichi Ukei, Takehiro Ui
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Publication number: 20220015275Abstract: For the purpose of providing an electromagnetic wave absorber usable for radar having a high resolution and sufficiently adaptable to a plurality of radars different in frequency, the bandwidth of a frequency band in which an electromagnetic wave absorption amount is not less than 20 dB is not less than 2 GHz, within a frequency band of 60 to 90 GHz.Type: ApplicationFiled: September 9, 2021Publication date: January 13, 2022Applicant: NITTO DENKO CORPORATIONInventors: Hiroichi Ukei, Takehiro Ui, Kazuto Yamagata, Yuki Takeda, Hironobu Machinaga, Yuya Kitagawa, Kazuaki Sasa
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Patent number: 11145988Abstract: For the purpose of providing an electromagnetic wave absorber usable for radar having a high revolution and sufficiently adaptable to a plurality of radars different in frequency, the bandwidth of a frequency band in which an electromagnetic wave absorption amount is not less than 20 dB is not less than 2 GHz, within a frequency band of 60 to 90 GHz.Type: GrantFiled: December 14, 2016Date of Patent: October 12, 2021Assignee: NITTO DENKO CORPORATIONInventors: Hiroichi Ukei, Takehiro Ui, Kazuto Yamagata, Yuki Takeda, Hironobu Machinaga, Yuya Kitagawa, Kazuaki Sasa
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Publication number: 20210059085Abstract: An electromagnetic wave absorber (1a) includes a resistive layer (10), an electrically conductive layer (20) and a dielectric layer (30). The electrically conductive layer (20) has a sheet resistance lower than a sheet resistance of the resistive layer (10). The dielectric layer (30) is disposed between the resistive layer (10) and the electrically conductive layer (20). The electromagnetic wave absorber (1a) has a first slit (15). The first slit (15) extends, in the resistive layer (10), from a first principal surface (10a) distal to the dielectric layer (30) toward the dielectric layer (30) in a direction perpendicular to the first principal surface (10a) and divides the resistive layer (10) into a plurality of first blocks (17). Each of the first blocks (17) has a minimum dimension (D1) of 2 mm or more at the first principal surface (10a).Type: ApplicationFiled: December 28, 2018Publication date: February 25, 2021Applicant: NITTO DENKO CORPORATIONInventors: Kazuto Yamagata, Hironobu Machinaga, Hiroichi Ukei, Takehiro Ui
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Patent number: 10816164Abstract: A lamp reflector (10a) includes a mirror surface (11) and a laminate (12a). The mirror surface (11) is a surface for reflecting light from a light source (30) to guide the light in a predetermined direction. The laminate (12a) covers at least a part of the mirror surface (11) to absorb an electromagnetic wave having a specific frequency of 20 GHz to 90 GHz. The laminate (12a) allows the light from the light source (30) to transmit therethrough toward the mirror surface (11).Type: GrantFiled: June 12, 2018Date of Patent: October 27, 2020Assignee: NITTO DENKO CORPORATIONInventors: Hiroichi Ukei, Takehiro Ui, Ryosuke Aoki, Hironobu Machinaga, Kazuto Yamagata, Yuuki Takeda
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Publication number: 20200207059Abstract: An electromagnetic wave absorber (1) includes a dielectric layer (10), a resistive layer (20), and an electrically conductive layer (30). The resistive layer (20) is disposed on one principal surface of the dielectric layer (10). The electrically conductive layer (30) is disposed on the other principal surface of the dielectric layer (10) and has a sheet resistance lower than a sheet resistance of the resistive layer (20). The resistive layer (20) has a sheet resistance of 200 to 600?/?. When the resistive layer (20) is subjected to an immersion treatment in which the resistive layer (20) is immersed in a 5 weight % aqueous solution of NaOH for 5 minutes, an absolute value of a difference between a sheet resistance of the resistive layer (20) before the immersion treatment and a sheet resistance of the resistive layer (20) after the immersion treatment is less than 100?/?.Type: ApplicationFiled: March 27, 2018Publication date: July 2, 2020Applicant: NITTO DENKO CORPORATIONInventors: Kazuto Yamagata, Hironobu Machinaga, Eri Ueda, Hiroichi Ukei, Takehiro Ui
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Publication number: 20200214181Abstract: An electromagnetic wave absorber (1) includes a dielectric layer (10), a resistive layer (20), and an electrically conductive layer (30). The resistive layer (20) is disposed on one principal surface of the dielectric layer (10). The electrically conductive layer (30) is disposed on the other principal surface of the dielectric layer (10) and has a sheet resistance lower than a sheet resistance of the resistive layer (20). The resistive layer (20) is a layer that includes tin oxide or titanium oxide as a main component or a layer that is made of indium tin oxide including 40 weight % or more of tin oxide.Type: ApplicationFiled: March 27, 2018Publication date: July 2, 2020Applicant: NITTO DENKO CORPORATIONInventors: Kazuto Yamagata, Hironobu Machinaga, Yuuki Takeda, Hiroichi Ukei, Takehiro Ui
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Patent number: 10701848Abstract: For the purpose of providing an electromagnetic wave absorber capable of holding excellent performance over a long period of time, the electromagnetic wave absorber includes: a dielectric layer B including a polymer film and having a first surface and a second surface; a resistive layer A formed on the first surface of the dielectric layer Band containing indium tin oxide as a main component; and an electrically conductive layer C formed on the second surface of the dielectric layer B and having a sheet resistance lower than that of the resistive layer A, wherein the indium tin oxide in the resistive layer A contains 20 to 40 wt. % of tin oxide based on the total weight of the indium tin oxide.Type: GrantFiled: December 14, 2016Date of Patent: June 30, 2020Assignee: NITTO DENKO CORPORATIONInventors: Kazuto Yamagata, Hironobu Machinaga, Takehiro Ui, Hiroichi Ukei, Yuya Kitagawa, Kazuaki Sasa
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Publication number: 20200178426Abstract: An electromagnetic wave absorber includes an electromagnetic wave-absorbing layer (10) and an adhesive layer (20). The adhesive layer (20) is disposed on at least one surface of the electromagnetic wave-absorbing layer (10). The electromagnetic wave absorber is capable of being adhered to a surface having a step in such a manner that the adhesive layer (20) is in contact with the surface. The adhesive layer (20) has a thickness equal to or greater than a reference height determined by subtracting 0.1 mm from the height of the step. In the electromagnetic wave absorber, a return loss ?R defined by ?R=Rt?Rr is 15 dB or more. Rt is a reflection amount of a 76-GHz electromagnetic wave and is measured for a reference specimen. Rr is a reflection amount of a 76-GHz electromagnetic wave and is measured for a specimen obtained by adhering the electromagnetic wave absorber.Type: ApplicationFiled: June 12, 2018Publication date: June 4, 2020Applicant: NITTO DENKO CORPORATIONInventors: Takehiro Ui, Hiroichi Ukei
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Publication number: 20200161771Abstract: An electromagnetic wave absorber (1a) includes a first layer (10) and an electrically conductive layer (20). The first layer (10) is a dielectric layer or a magnetic layer. The electrically conductive layer (20) is provided on at least one surface of the first layer. A product of a Young's modulus of the first layer (10) and a thickness of the first layer (10) is 0.1 to 1000 MPa · mm. The first layer (10) has a relative permittivity of 1 to 10.Type: ApplicationFiled: January 23, 2018Publication date: May 21, 2020Applicant: NITTO DENKO CORPORATIONInventors: Hiroichi Ukei, Takehiro Ui, Hironobu Machinaga, Kazuto Yamagata, Yuuki Takeda
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Publication number: 20200128705Abstract: An electromagnetic wave absorber (1) includes a dielectric layer (10), a resistive layer (20), and an electrical conductive layer (30). The resistive layer (20) is disposed on one principal surface of the dielectric layer (10). The electrical conductive layer (30) is disposed on the other principal surface of the dielectric layer (10) and has a sheet resistance lower than a sheet resistance of the resistive layer (20). The resistive layer (20) includes indium oxide as a main component, has a polycrystalline structure, and has a sheet resistance of 260 to 500?/? and a specific resistance of 5×10?4 ?·cm or more.Type: ApplicationFiled: March 27, 2018Publication date: April 23, 2020Applicant: NITTO DENKO CORPORATIONInventors: Kazuto Yamagata, Hironobu Machinaga, Yuuki Takeda, Eri Ueda, Hiroichi Ukei, Takehiro Ui
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Publication number: 20200116332Abstract: A lamp reflector (10a) includes a mirror surface (11) and a laminate (12a). The mirror surface (11) is a surface for reflecting light from a light source (30) to guide the light in a predetermined direction. The laminate (12a) covers at least a part of the mirror surface (11) to absorb an electromagnetic wave having a specific frequency of 20 GHz to 90 GHz. The laminate (12a) allows the light from the light source (30) to transmit therethrough toward the mirror surface (11).Type: ApplicationFiled: June 12, 2018Publication date: April 16, 2020Applicant: NITTO DENKO CORPORATIONInventors: Hiroichi Ukei, Takehiro Ui, Ryosuke Aoki, Hironobu Machinaga, Kazuto Yamagata, Yuuki Takeda
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Patent number: 10512200Abstract: An electromagnetic wave absorber (1a) includes: a first layer (10a) being a dielectric layer or a magnetic layer; and a conductive layer (20a) provided on at least one surface of the first layer (10a). The conductive layer (20a) has a sheet resistance of 100?/? or less after the electromagnetic wave absorber (1a) is exposed to an environment having a temperature of 85° C. and a relative humidity of 85% for 1000 hours. The electromagnetic wave absorber (1a) has a flexural rigidity of 7000 MPa·mm4 or less.Type: GrantFiled: December 11, 2017Date of Patent: December 17, 2019Assignee: NITTO DENKO CORPORATIONInventors: Hironobu Machinaga, Hiroichi Ukei, Takehiro Ui, Kazuto Yamagata, Yuuki Takeda
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Publication number: 20190380232Abstract: An electromagnetic wave absorber (1a) includes: a first layer (10a) being a dielectric layer or a magnetic layer; and a conductive layer (20a) provided on at least one surface of the first layer (10a). The conductive layer (20a) has a sheet resistance of 100?/? or less after the electromagnetic wave absorber (1a) is exposed to an environment having a temperature of 85° C. and a relative humidity of 85% for 1000 hours. The electromagnetic wave absorber (1a) has a flexural rigidity of 7000 MPa·mm4 or less.Type: ApplicationFiled: December 11, 2017Publication date: December 12, 2019Applicant: NITTO DENKO CORPORATIONInventors: Hironobu Machinaga, Hiroichi Ukei, Takehiro Ui, Kazuto Yamagata, Yuuki Takeda