公开(公告)号：US20220085274A1

公开(公告)日：2022-03-17

申请号：US17279054

申请日：2019-09-27

Applicant: Nitto Denko Corporation

Inventor： Daisuke NAKAMURA ,  Naoki NAGAOKA ,  Manami KUROSE ,  Hironobu MACHINAGA ,  Taketo ISHIKAWA ,  Takahiko YANAGITANI ,  Takahiro SHIMIZU

IPC: H01L41/187 ,  H01L41/08 ,  H01L41/316 ,  C04B35/453 ,  C04B35/622

Abstract: A piezoelectric device having a high conversion efficiency between electrical energy and mechanical energy is provided. The piezoelectric device has first electrode, a second electrode, and a piezoelectric layer provided between the first electrode and the second electrode, wherein the piezoelectric layer is formed of a ZnO-based material having a wurtzite crystal structure to which a metal that does not cause the piezoelectric layer to exhibit conductivity is added, and wherein a squared value of a electromechanical coupling coefficient in thickness vibration mode is 6.5% or more.

公开(公告)号：US20190263996A1

公开(公告)日：2019-08-29

申请号：US16320366

申请日：2017-04-06

Applicant: NITTO DENKO CORPORATION

Inventor： Masayoshi NAKAMURA ,  Masayuki HODONO ,  Takahiko ITO ,  Naoki NAGAOKA ,  Tomoaki HISHIKI

IPC: C08J9/28 ,  C08G73/10

Abstract: Provided is a low-dielectric porous polymer film having a low dielectric constant at high millimeter-wave frequencies and thereby useful as a sheet for a millimeter-wave antenna. The low-dielectric porous polymer film is made of a polymer material and formed with fine pores dispersed therein, wherein the film has a porosity of 60% or more, and the pores have an average pore diameter of 10 μm or less.

公开(公告)号：US20220181542A1

公开(公告)日：2022-06-09

申请号：US17439806

申请日：2020-03-10

Applicant: Nitto Denko Corporation

Inventor： Daisuke NAKAMURA ,  Naoki NAGAOKA ,  Manami KUROSE ,  Taketo ISHIKAWA ,  Hironobu MACHINAGA

IPC: H01L41/08 ,  H01L41/047 ,  H01L41/187 ,  H01L41/29 ,  H01L41/316 ,  H01L41/319

Abstract: The occurrence of cracking in a functional layer is suppressed, while maintaining flexibility of a layered structure. The layered structure includes a polymer substrate, and a crystalline functional layer formed on the first surface of the substrate. The surface roughness of the first surface of the substrate is 3 nm or less in terms of arithmetic mean roughness (Ra).

公开(公告)号：US20200032026A1

公开(公告)日：2020-01-30

申请号：US16500882

申请日：2018-04-06

Applicant: NITTO DENKO CORPORATION

Inventor： Masayoshi NAKAMURA ,  Masayuki HODONO ,  Takahiko ITO ,  Naoki NAGAOKA ,  Tomoaki HISHIKI

IPC: C08J9/28 ,  B32B7/12 ,  B32B15/08 ,  B32B15/20 ,  B32B27/28

Abstract: Provided is a porous low-dielectric polymer film which has a low dielectric constant at high millimeter-wave frequencies to fulfill utility as a sheet for a millimeter-wave antenna, and provides excellent circuit board processability. The porous low-dielectric polymer film is made of a polymer material and formed with fine pores dispersed therein, wherein the film has a porosity of 60% or more, and the pores have an average pore diameter of 50 μm or less, and wherein a porous structure of the film is a closed-cell structure.

公开(公告)号：US20220037580A1

公开(公告)日：2022-02-03

申请号：US17279692

申请日：2019-09-20

Applicant: Nitto Denko Corporation

Inventor： Daisuke NAKAMURA ,  Naoki NAGAOKA ,  Manami KUROSE ,  Hironobu MACHINAGA

IPC: H01L41/083 ,  H01L41/08 ,  H01L41/187 ,  H01L41/277 ,  H01L41/316 ,  H01L41/319

Abstract: For a piezoelectric device, an optical characteristic and/or a piezoelectric characteristic is improved. A piezoelectric device has a first electrode layer, a second electrode layer, and a piezoelectric layer provided between the first electrode layer and the second electrode layer, wherein the piezoelectric layer is formed of a wurtzite crystal material as a main component, to which one or more elements is/are added, said one or more elements being transparent when turned into an oxide, and wherein a haze value is 3% or less, and transmittance with respect to light having a wavelength of 380 nm is 50% or more.

公开(公告)号：US20210399202A1

公开(公告)日：2021-12-23

申请号：US17279538

申请日：2019-09-26

Applicant: Nitto Denko Corporation

Inventor： Naoki NAGAOKA ,  Daisuke NAKAMURA ,  Manami KUROSE

IPC: H01L41/047 ,  H01L41/113 ,  H01L41/187 ,  H01L41/29

Abstract: A piezoelectric device that exhibits good piezoelectric characteristics, while reducing generation of leakage current paths, and a method of manufacturing the same, are provided. The piezoelectric device has a multilayer stack in which a first electrode, a piezoelectric layer, and a second electrode are stacked in this order on a substrate, wherein at least the first electrode is formed of an amorphous oxide conductor.

公开(公告)号：US20230140996A1

公开(公告)日：2023-05-11

申请号：US17915317

申请日：2021-02-25

Applicant: NITTO DENKO CORPORATION

Inventor： Koji SAKAMOTO ,  Takahiko ITO ,  Naoki NAGAOKA ,  Shu SASAKI ,  Daiki KATO

IPC: B32B5/18 ,  B32B27/08 ,  B32B27/32 ,  B32B25/08 ,  B32B27/34

CPC classification number: B32B5/18 ,  B32B27/08 ,  B32B27/32 ,  B32B25/08 ,  B32B27/34 ,  B32B2266/025 ,  B32B2266/0257 ,  B32B2250/04 ,  B32B2250/24 ,  B32B2250/22 ,  B32B2307/206 ,  B32B2305/026 ,  B32B2266/104 ,  B32B2457/00

Abstract: A resin sheet includes a porous structure. The porous structure is configured to adjust transmission of a millimeter wave. The porous structure has a relative permittivity varying in stages in a thickness direction of the resin sheet from a plane on which the millimeter wave is incident, the relative permittivity varying such that a difference between average relative permittivities in two adjacent layer portions is a predetermined value or less, the layer portions each having a particular thickness smaller than a wavelength of the millimeter wave. The porous structure has, as pores, only pores each having a pore diameter equal to or less than 10% of the wavelength of the millimeter wave.

公开(公告)号：US20210343927A1

公开(公告)日：2021-11-04

申请号：US17279943

申请日：2019-09-20

Applicant: Nitto Denko Corporation

Inventor： Naoki NAGAOKA ,  Daisuke NAKAMURA

IPC: H01L41/083 ,  H01L41/08 ,  H01L41/313 ,  H01L41/27

Abstract: A piezoelectric device has a good piezoelectric characteristic, while suppressing a leakage current between electrodes. The piezoelectric device has a first substrate, a first conductive film provided on the first substrate, a piezoelectric layer formed of an inorganic material and provided on the first conductive film, an adhesive layer provided on the piezoelectric layer, and a second conductive film provided on the adhesive layer.

公开(公告)号：US20250110265A1

公开(公告)日：2025-04-03

申请号：US18730130

申请日：2023-01-13

Applicant: Nitto Denko Corporation

Inventor： Naoki NAGAOKA ,  Daiki KATO ,  Shimpei YAKUWA ,  Shunji IMAMURA

IPC: G02B5/08

Abstract: Provided is a reflector having reflection characteristics of a broad frequency band. The reflector includes: a dielectric layer; a conductive layer that is provided on a first surface of the dielectric layer and includes a periodical arrangement of a plurality of conductor patterns; and a ground layer that is provided on a second surface opposite to the first surface. The conductive layer is configured to reflect incident waves at an angle having a size different from that of an incident angle of the incident waves. The dielectric layer has a relative dielectric constant of 2.0 or less.

公开(公告)号：US20220158071A1

公开(公告)日：2022-05-19

申请号：US17439504

申请日：2020-03-10

Applicant: Nitto Denko Corporation

Inventor： Daisuke NAKAMURA ,  Naoki NAGAOKA ,  Taketo ISHIKAWA ,  Hironobu MACHINAGA

IPC: H01L41/047 ,  H01L41/08 ,  H01L41/187 ,  H01L41/29

Abstract: A piezo electric device having a configuration that can suppress the formation of a leakage path between electrodes that sandwich a piezoelectric layer and also reduce deterioration in the piezoelectric characteristics, is provided. The piezoelectric device has a first electrode, a piezoelectric layer, and a second electrode stacked in this order on a substrate. The first electrode and the second electrode are arranged so as not to overlap each other in the stacking direction.