公开(公告)号：US12119184B2

公开(公告)日：2024-10-15

申请号：US17886538

申请日：2022-08-12

Applicant: DENSO CORPORATION ,  TOKYO UNIVERSITY OF SCIENCE FOUNDATION

Inventor： Yoshihiro Kozawa ,  Noriyuki Matsushita ,  Kazuhiko Kano ,  Yumi Tanaka ,  Hiroki Otsuka ,  Yusuke Edano

IPC: H02N1/08 ,  H01G7/02 ,  H02K35/02 ,  H02N1/00

CPC classification number: H01G7/025 ,  H02N1/08

Abstract: A power generator includes an electret including a first charged surface and a second charged surface having opposite polarities, a first electrode partially formed on the first charged surface, a second electrode formed on the second charged surface, a third electrode disposed to face the first charged surface with a space, and at least one of a power storage unit or an output unit. The first charged surface has a current collecting surface that is exposed outward. The first electrode and the second electrode form a first power generating unit and the third electrode and the second electrode form a second power generating unit. The electret is formed by polarizing an electret material that includes an inorganic dielectric having a bandgap energy of 4 eV or more.

公开(公告)号：US11785857B2

公开(公告)日：2023-10-10

申请号：US16937966

申请日：2020-07-24

Applicant: DENSO CORPORATION

Inventor： Akihiko Teshigahara ,  Kazuhiko Kano ,  Kenichi Sakai

IPC: H10N30/853 ,  H10N30/072

CPC classification number: H10N30/853 ,  H10N30/072

Abstract: Provided is a piezoelectric film including an AlN crystal, and a first element and a second element doped to the AlN crystal. The first element is an element having an ionic radius larger than an ionic radius of Al. The second element is an element having an ionic radius smaller than the ionic radius of Al. Also provided are piezoelectric film laminated body including an underlayer and a piezoelectric film including ScAlN, and a method of manufacturing the same. The underlayer has a crystal lattice having six-fold symmetry or three-fold symmetry. Also provided are a piezoelectric film including ScAlN having a laminated structure of a hexagonal crystal and a cubic crystal, and a method of manufacturing the same. The cubic crystal is doped with an element other than trivalent element.

公开(公告)号：US09735342B2

公开(公告)日：2017-08-15

申请号：US14888278

申请日：2014-05-22

Applicant: DENSO CORPORATION ,  NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

Inventor： Akihiko Teshigahara ,  Kazuhiko Kano ,  Morito Akiyama ,  Keiko Nishikubo

IPC: H01L41/18 ,  H01L41/39 ,  C04B35/581 ,  C23C14/06 ,  H01L41/187 ,  H01L41/316 ,  C23C14/18 ,  C23C14/34 ,  C23C14/46

CPC classification number: H01L41/18 ,  C23C14/0052 ,  C23C14/06 ,  C23C14/0641 ,  C23C14/18 ,  C23C14/185 ,  C23C14/34 ,  C23C14/3464 ,  C23C14/46 ,  H01L41/187 ,  H01L41/316

Abstract: A piezoelectric thin film is formed through sputtering and consists essentially of scandium aluminum nitride. The carbon atomic content is 2.5 at % or less. When producing the piezoelectric thin film, scandium and aluminum are sputtered simultaneously on a substrate from a scandium aluminum alloy target material having a carbon atomic content of 5 at % or less in an atmosphere where at least nitrogen gas exists. The sputtering may be conducted also by applying an ion beam on an opposing surface of the alloy target material at an oblique angle. Moreover, aluminum and scandium may be also sputtered simultaneously on the substrate from an Sc target material and an Al target material. As a result, a piezoelectric thin film which exhibits excellent piezoelectric properties and a method for the same can be provided.

公开(公告)号：US12191088B2

公开(公告)日：2025-01-07

申请号：US17886548

申请日：2022-08-12

Applicant: DENSO CORPORATION ,  TOKYO UNIVERSITY OF SCIENCE FOUNDATION

Inventor： Yoshihiro Kozawa ,  Noriyuki Matsushita ,  Kazuhiko Kano ,  Yumi Tanaka ,  Hiroki Otsuka ,  Yusuke Edano

IPC: H01G7/02 ,  H02N1/08

Abstract: A power generator includes a power generating unit and at least one of a power storage unit or an output unit that is electrically connected to the power generating unit. The power generating unit includes an electret having a first charged surface and a second charged surface that are charged with opposite polarities, a first electrode formed on the first charged surface, and a second electrode formed on the second charged surface. The electret is formed by polarizing an electret material that includes an inorganic dielectric having a bandgap energy of 4 eV or more. At least one of the first electrode or the second electrode are partially disposed on the corresponding charged surface such that at least one of the first charged surface or the second charged surface has a portion as a current collecting surface exposed outward.

公开(公告)号：US20240241078A1

公开(公告)日：2024-07-18

申请号：US18603999

申请日：2024-03-13

Applicant: DENSO CORPORATION

Inventor： Kazuhisa NAKAGAWA ,  Yuhei Shimizu ,  Daisuke Kobayashi ,  Masashi Suzuki ,  Akira Nukazuka ,  Teppei Sakai ,  Kei Hayakawa ,  Kazuhiko Kano ,  Mana Asano

IPC: G01N27/414 ,  G01N27/30

CPC classification number: G01N27/4141 ,  G01N27/301

Abstract: An ion sensor includes an ion detection element, a reference electrode that provides a reference point of a potential, and a solution in which an ion concentration can be changed in a sensing area of the ion detection element. The sensing area of the ion detection element is disposed in the solution. A method for detecting a target substance employs an ion sensor. The target substance bound to a label having a function of changing the amount of ions detectable by the ion sensor is introduced into the solution, and a change in the amount of ions is detected using the ion sensor.