Patents by Inventor Yudai UNO
Yudai UNO 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).
-
Patent number: 11888462Abstract: A bonded body includes a supporting substrate; a piezoelectric material substrate; a first bonding layer provided on the supporting substrate and having a composition of Si(1-x)Ox (0.008?x?0.408); a second bonding layer provided on the piezoelectric material substrate and having a composition of Si(1-y)Oy (0.008?y?0.408); and an amorphous layer provided between the first bonding layer and second bonding layer. The oxygen ratio of the amorphous layer is higher than the oxygen ratio of the first bonding layer and oxygen ratio of the second bonding layer.Type: GrantFiled: April 15, 2021Date of Patent: January 30, 2024Assignee: NGK INSULATORS, LTD.Inventors: Yudai Uno, Masashi Goto, Tomoyoshi Tai
-
Patent number: 11635189Abstract: A phosphor element includes: a phosphor part having an incident face for excitation light, an opposing face opposing the incident face, and a side face, the phosphor part converting at least a part of the excitation light incident onto the incident face into a fluorescence and emitting the fluorescence from the incident face; an integral low refractive index layer on the side face and opposing face of the phosphor part and having a refractive index lower than that of the phosphor part; and an integral reflection film covering a surface of the low refractive index layer. The area of the incident face of the phosphor part is larger than the area of the opposing face.Type: GrantFiled: January 18, 2022Date of Patent: April 25, 2023Assignee: NGK INSULATORS, LTD.Inventors: Jungo Kondo, Naotake Okada, Yuichi Iwata, Keiichiro Asai, Yudai Uno
-
Patent number: 11632093Abstract: An acoustic wave device includes a piezoelectric material substrate, an intermediate layer on the piezoelectric material substrate and composed of one or more materials selected from the group consisting of silicon oxide, aluminum nitride and sialon. A bonding layer is on the intermediate layer and is composed of one or more materials selected from the group consisting of tantalum pentoxide, niobium pentoxide, titanium oxide, mullite, alumina, and a high resistance silicon and hafnium oxide. A supporting body is composed of a polycrystalline ceramic and is bonded to the bonding layer by direct bonding, and an electrode is on the piezoelectric material substrate.Type: GrantFiled: March 26, 2019Date of Patent: April 18, 2023Assignee: NGK INSULATORS, LTD.Inventors: Tomoyoshi Tai, Masahiko Namerikawa, Yudai Uno, Ryosuke Hattori, Keiichiro Asai
-
Patent number: 11569434Abstract: A vibrating plate-bonded body includes a supporting substrate composed of silicon, a vibrating plate composed of a highly rigid ceramics and having a thickness of 100 ?m or smaller, and a bonding layer between the supporting substrate and vibrating plate, contacting a bonding surface of the vibrating plate and composed of ?-Si. The arithmetic average roughness Ra of the bonding surface of the vibrating plate is 0.01 nm or more and 10.0 nm or less, and the pit density of the bonding surface of the vibrating plate is 10 counts or more per 100 ?m2.Type: GrantFiled: October 27, 2021Date of Patent: January 31, 2023Assignee: NGK INSULATORS, LTD.Inventors: Yudai Uno, Tomoyoshi Tai, Keiichiro Asai, Masato Niwa
-
Publication number: 20230006634Abstract: A composite substrate includes: a piezoelectric layer; and a reflective layer arranged on a rear surface side of the piezoelectric layer, wherein the reflective layer includes a high-impedance layer and a low-impedance layer containing silicon oxide, and wherein a ratio of a region of first structures in the high-impedance layer is more than 70%.Type: ApplicationFiled: September 9, 2022Publication date: January 5, 2023Applicant: NGK Insulators, Ltd.Inventors: Takeshi YAMAMOTO, Yudai UNO, Hiroyoshi INA, Keiichiro ASAI, Tomoyoshi TAI
-
Publication number: 20220393094Abstract: A vibrating plate-bonded body includes a supporting substrate composed of silicon, a vibrating plate composed of a highly rigid ceramics and having a thickness of 100 ?m or smaller, and a bonding layer between the supporting substrate and vibrating plate, contacting a bonding surface of the vibrating plate and composed of ?-Si. The arithmetic average roughness Ra of the bonding surface of the vibrating plate is 0.01 nm or more and 10.0 nm or less, and the pit density of the bonding surface of the vibrating plate is 10 counts or more per 100 ?m2.Type: ApplicationFiled: October 27, 2021Publication date: December 8, 2022Inventors: Yudai UNO, Tomoyoshi TAI, Keiichiro ASAI, Masato NIWA
-
Publication number: 20220329230Abstract: A piezoelectric vibrating device includes a piezoelectric layer composed of a bulk piezoelectric material, a lower electrode on a first surface of the piezoelectric layer and a supporting substrate bonded with the lower electrode.Type: ApplicationFiled: June 28, 2022Publication date: October 13, 2022Inventors: Tomoyoshi TAI, Yudai UNO, Keiichiro ASAI, Ryosuke HATTORI, Masato NIWA, Masahiko NAMERIKAWA
-
Patent number: 11448907Abstract: A bonded body for an optical modulator includes a supporting substrate, an optical waveguide material provided on the supporting substrate and composed of lithium niobate, lithium tantalate and lithium niobate-lithium tantalate, and an optical waveguide in the optical waveguide material. The supporting substrate is composed of a material selected from the group consisting of magnesium oxide and a magnesium-silicon composite oxide.Type: GrantFiled: October 2, 2020Date of Patent: September 20, 2022Assignee: NGK INSULATORS, LTD.Inventors: Tomoyoshi Tai, Yudai Uno, Jungo Kondo, Yoshimasa Kobayashi, Tatsuya Hishiki, Hiroharu Kobayashi
-
Patent number: 11411547Abstract: A bonded body includes a supporting substrate composed of a polycrystalline ceramic material or monocrystalline material, a piezoelectric single crystal substrate and a bonding layer provided between the supporting substrate and piezoelectric single crystal substrate. The bonding layer has a composition of Si(1-x)Ox (x represents an oxygen ratio). The oxygen ratio is increased or decreased from an end part of the bonding layer on the side of the piezoelectric single crystal substrate to an end part of the bonding layer on the side of the supporting substrate. The maximum value of the oxygen ratio x in the bonding layer is 0.013 or higher and 0.666 or lower, and the minimum value of the oxygen ratio is 0.001 or higher and 0.408 or lower.Type: GrantFiled: September 25, 2020Date of Patent: August 9, 2022Assignee: NGK INSULATORS, LTD.Inventors: Masashi Goto, Yudai Uno, Tomoyoshi Tai
-
Publication number: 20220205612Abstract: A phosphor element includes: a phosphor part having an incident face for excitation light, an opposing face opposing the incident face, and a side face, the phosphor part converting at least a part of the excitation light incident onto the incident face into a fluorescence and emitting the fluorescence from the incident face; an integral low refractive index layer on the side face and opposing face of the phosphor part and having a refractive index lower than that of the phosphor part; and an integral reflection film covering a surface of the low refractive index layer. The area of the incident face of the phosphor part is larger than the area of the opposing face.Type: ApplicationFiled: January 18, 2022Publication date: June 30, 2022Inventors: Jungo KONDO, Naotake OKADA, Yuichi IWATA, Keiichiro ASAI, Yudai UNO
-
Publication number: 20220149811Abstract: A bonded body includes a supporting substrate, piezoelectric material substrate and a multilayer film, between the supporting substrate and piezoelectric material substrate. The multilayer film includes a lamination structure having a first layer, second layer, third layer and fourth layer in the order. The first layer and third layer are composed of silicon oxides, and the second layer and fourth layer are composed of metal oxides. The refractive index of the second layer is higher than the refractive index of the first layer and refractive index of the third layer. The refractive index of the second layer is different from the refractive index of the fourth layer.Type: ApplicationFiled: January 20, 2022Publication date: May 12, 2022Inventors: Ryosuke HATTORI, Keiichiro ASAI, Tomoyoshi TAI, Yudai UNO
-
Patent number: 11262046Abstract: A phosphor element includes: a phosphor part having an incident face for excitation light, an opposing face opposing the incident face, and a side face, the phosphor part converting at least a part of the excitation light incident onto the incident face into a fluorescence and emitting the fluorescence from the incident face; an integral low refractive index layer on the side face and opposing face of the phosphor part and having a refractive index lower than that of the phosphor part; and an integral reflection film covering a surface of the low refractive index layer. The area of the incident face of the phosphor part is larger than the area of the opposing face.Type: GrantFiled: March 26, 2021Date of Patent: March 1, 2022Assignee: NGK INSULATORS, LTD.Inventors: Jungo Kondo, Naotake Okada, Yuichi Iwata, Keiichiro Asai, Yudai Uno
-
Publication number: 20220052251Abstract: A vibrating plate-bonded body includes a supporting substrate composed of silicon, a vibrating plate composed of a highly rigid ceramics and having a thickness of 100 ?m or smaller, and a bonding layer between the supporting substrate and vibrating plate, contacting a bonding surface of the vibrating plate and composed of ?-Si. The arithmetic average roughness Ra of the bonding surface of the vibrating plate is 0.01 nm or more and 10.0 nm or less, and the pit density of the bonding surface of the vibrating plate is 10 counts or more per 100 ?m2.Type: ApplicationFiled: October 27, 2021Publication date: February 17, 2022Inventors: Yudai UNO, Tomoyoshi TAI, Keiichiro ASAI, Masato NIWA
-
Publication number: 20220004030Abstract: A composite substrate for an electro-optic element is disclosed. The composite substrate includes: an electro-optic crystal substrate having an electro-optic effect; a low-refractive-index layer being in contact with the electro-optic crystal substrate and having a lower refractive index than the electro-optical crystal substrate; and a support substrate bonded to the low-refractive-index layer at least via a bonding layer. A plurality of interfaces located between the low-refractive-index layer and the support substrate includes at least one rough interface having a roughness that is larger than a roughness of an interface between the electro-optic crystal substrate and the low-refractive-index layer.Type: ApplicationFiled: September 21, 2021Publication date: January 6, 2022Inventors: Yudai UNO, Tomoyoshi TAI, Jungo KONDO
-
Patent number: 11150497Abstract: A composite substrate for an electro-optic element is disclosed. The composite substrate includes: an electro-optic crystal substrate having an electro-optic effect; a low-refractive-index layer being in contact with the electro-optic crystal substrate and having a lower refractive index than the electro-optical crystal substrate; and a support substrate bonded to the low-refractive-index layer at least via a bonding layer. A plurality of interfaces located between the low-refractive-index layer and the support substrate includes at least one rough interface having a roughness that is larger than a roughness of an interface between the electro-optic crystal substrate and the low-refractive-index layer.Type: GrantFiled: March 30, 2021Date of Patent: October 19, 2021Assignee: NGK INSULATORS, LTD.Inventors: Yudai Uno, Tomoyoshi Tai, Jungo Kondo
-
Patent number: 11139427Abstract: A bonded body includes a piezoelectric single crystal substrate; a supporting substrate composed of a polycrystalline ceramic material or a single crystal material; a bonding layer provided on the piezoelectric single crystal substrate and having a composition of Si(1-x)Ox (0.008?x?0.408); and an amorphous layer provided between the supporting substrate and bonding layer, the amorphous layer containing oxygen atoms and argon atoms. A concentration of the oxygen atoms at a central part of the amorphous layer is higher than a concentration of the oxygen atoms at a peripheral part of the amorphous layer.Type: GrantFiled: December 21, 2020Date of Patent: October 5, 2021Assignee: NGK INSULATORS, LTD.Inventors: Yudai Uno, Masashi Goto, Tomoyoshi Tai
-
Patent number: 11133788Abstract: A bonded body includes: a piezoelectric single crystal substrate; a supporting substrate composed of a single crystal silicon; a bonding layer—provided between the supporting substrate and piezoelectric single crystal substrate and having a composition of Si(1-x)Ox (0.008?x?0.408); and an amorphous layer provided between the supporting substrate and bonding layer and containing silicon atoms, oxygen atoms, and argon atoms. The concentration of the oxygen atoms in an end part of the amorphous layer on a side of the bonding layer is higher than the average concentration of the oxygen atoms in the bonding layer.Type: GrantFiled: December 21, 2020Date of Patent: September 28, 2021Assignee: NGK INSULATORS, LTD.Inventors: Yudai Uno, Masashi Goto, Tomoyoshi Tai
-
Publication number: 20210234529Abstract: A bonded body includes a supporting substrate composed of a metal oxide, a piezoelectric material substrate, a bonding layer provided between the supporting substrate and piezoelectric material substrate and having a composition of Si(1-x)Ox (0.008?x?0.408), and an amorphous layer provided between the bonding layer and supporting substrate. The oxygen ratio of the amorphous layer is higher than the oxygen ratio of the supporting substrate.Type: ApplicationFiled: April 15, 2021Publication date: July 29, 2021Inventors: Yudai UNO, Masashi GOTO, Tomoyoshi TAI
-
Publication number: 20210234530Abstract: A bonded body includes a supporting substrate; a piezoelectric material substrate; a first bonding layer provided on the supporting substrate and having a composition of Si(1-x)Ox (0.008?x?0.408); a second bonding layer provided on the piezoelectric material substrate and having a composition of Si(1-y)Oy (0.008?y?0.408); and an amorphous layer provided between the first bonding layer and second bonding layer. The oxygen ratio of the amorphous layer is higher than the oxygen ratio of the first bonding layer and oxygen ratio of the second bonding layer.Type: ApplicationFiled: April 15, 2021Publication date: July 29, 2021Inventors: Yudai UNO, Masashi GOTO, Tomoyoshi TAI
-
Patent number: 11070189Abstract: A bonded body includes a supporting substrate, a piezoelectric single crystal substrate and a bonding layer provided between the supporting substrate and piezoelectric single crystal substrate. The bonding layer has a composition of Si(1-x)Ox (x represents an oxygen ratio). The oxygen ratio x at a central part in a thickness direction of the bonding layer is higher than an oxygen ratio x at an end part of the bonding layer on a side of the piezoelectric single crystal substrate and an oxygen ratio x at an end part of the bonding layer on a side of the supporting substrate. The oxygen ratio at the central part in the thickness direction of the bonding layer is 0.013 or higher and 0.666 or lower.Type: GrantFiled: September 28, 2020Date of Patent: July 20, 2021Assignee: NGK INSULATORS, LTD.Inventors: Masashi Goto, Yudai Uno, Tomoyoshi Tai