公开(公告)号：US20230019706A1

公开(公告)日：2023-01-19

申请号：US17946825

申请日：2022-09-16

Applicant: FUJIFILM Corporation

Inventor： Teruo ASHIKAWA ,  Kazuo HIRAGUCHI ,  Yusuke KAGAWA ,  Tetsu MIYOSHI

IPC: H04R17/00 ,  H01L41/047 ,  H01L41/053 ,  H01L41/083

Abstract: Provided are a laminated piezoelectric element and an electroacoustic transducer capable of obtaining high piezoelectric characteristics and easily ensuring an electric contact to an electrode layer. A plurality of layers of piezoelectric films, each of which is formed by laminating a first protective layer, a first electrode layer, a piezoelectric layer, a second electrode layer, and a second protective layer in this order, are laminated. Each of the piezoelectric layers is polarized in a thickness direction. In each of the piezoelectric films, the first electrode is disposed on an upstream side in a polarization direction of the piezoelectric layer, and the second electrode is disposed on a downstream side. Each of the plurality of piezoelectric films has a cemented portion which is cemented to an adjacent piezoelectric film and a protruding portion which is not cemented to the adjacent piezoelectric film and in which at least the first electrode layer and the first protective layer or the second electrode layer and the second protective layer protrude from the cemented portion toward the outside in a plane direction. At the protruding portion of each of the piezoelectric films, at least one of a first contact, to which the first electrode layers of the piezoelectric films are electrically connected to each other, or a second contact, to which the second electrode layers of the piezoelectric films are electrically connected to each other, is formed.

公开(公告)号：US20150043104A1

公开(公告)日：2015-02-12

申请号：US14521486

申请日：2014-10-23

Applicant: FUJIFILM CORPORATION

Inventor： Teruo ASHIKAWA

IPC: G11B23/50 ,  G11B19/26

CPC classification number: G11B23/502 ,  G11B19/26 ,  G11B23/50

Abstract: A tape cleaning device includes a blade that, while touching a recording tape that is running, scrapes foreign bodies from the recording tape; a roller that touches the recording tape and rotates along with the running of the recording tape, the foreign bodies scraped off by the blade being transferred to the roller; and a removal mechanism that removes the foreign bodies that have been transferred to the roller from the roller.

Abstract translation: 磁带清洁装置包括：刮刀，其在接触正在运行的记录带时，从记录带刮除异物; 接触记录带并随着记录带的运行而旋转的辊，被刮刀刮掉的异物被转移到辊上; 以及去除已经从辊转移到辊的异物的去除机构。

公开(公告)号：US20230007400A1

公开(公告)日：2023-01-05

申请号：US17943801

申请日：2022-09-13

Applicant: FUJIFILM Corporation

Inventor： Yusuke KAGAWA ,  Teruo ASHIKAWA ,  Kazuo HIRAGUCHI

IPC: H04R7/10 ,  H01L41/083 ,  H01L41/18 ,  H01L41/37 ,  H04R17/00 ,  H04R31/00

Abstract: Provided is a laminated piezoelectric element capable of suppressing a short circuit between piezoelectric films in a laminated piezoelectric element in which a plurality of layers of a piezoelectric film formed by interposing a piezoelectric layer between an electrode layer and a protective layer are laminated. The laminated piezoelectric element is formed by laminating a plurality of layers of piezoelectric films each having a piezoelectric layer, two electrode layers between which the piezoelectric layer is interposed, and two protective layers respectively covering the electrode layers. At least a part of each end side of the adjacent piezoelectric films is located at a different position in a plane direction.

公开(公告)号：US20220271215A1

公开(公告)日：2022-08-25

申请号：US17741859

申请日：2022-05-11

Applicant: FUJIFILM Corporation

Inventor： Yusuke KAGAWA ,  Teruo ASHIKAWA ,  Kazuo HIRAGUCHI

IPC: H01L41/193 ,  H01L41/45

Abstract: An object of the present invention is to provide a laminated piezoelectric element in which piezoelectric films are laminated, capable of easily performing connection of an electrode layer of each piezoelectric film and an external device. The piezoelectric film includes a piezoelectric layer and a laminated sheet in which an electrode layer and a protective layer are laminated, piezoelectric layers are arranged between the laminated sheets facing the electrode layer, the laminated sheet includes a protruding portion protruding from the piezoelectric layer, the protruding portion is provided with a lead-out wire attached to a surface between the electrode layer and the protective layer, and the object is achieved by contacting the lead-out wire and connecting electrode layers having a same polarity of each piezoelectric film.

公开(公告)号：US20230026623A1

公开(公告)日：2023-01-26

申请号：US17955610

申请日：2022-09-29

Applicant: FUJIFILM Corporation

Inventor： Teruo ASHIKAWA ,  Yusuke KAGAWA ,  Kazuo HIRAGUCHI ,  Tetsu MIYOSHI

IPC: H04R17/00 ,  H01L41/09 ,  H01L41/18 ,  H01L41/083 ,  H01L41/047 ,  H01L41/08

Abstract: Provided is a laminated piezoelectric element is formed by folding back and laminating a piezoelectric film having an electrode layer and a protective layer on both sides of a piezoelectric layer in which piezoelectric particles are dispersed in a matrix. In the laminated two layers of the piezoelectric film, in a case where a thickness of a central portion thereof is a center thickness and a position up to twice the center thickness in a direction from the folded side end part toward the center is the folded-back portion, there is a position at which the thickness is greater than the center thickness in the folded-back portion, and there is an air gap in the folded-back portion or the air gap is filled with a cementing agent. The laminated piezoelectric element is able to prevent peeling of the electrode layer and the like in the folded-back portion in the laminated piezoelectric element in which the piezoelectric film is folded back and laminated. An electroacoustic transducer uses the laminated piezoelectric element.

公开(公告)号：US20220272458A1

公开(公告)日：2022-08-25

申请号：US17742193

申请日：2022-05-11

Applicant: FUJIFILM Corporation

Inventor： Yusuke KAGAWA ,  Teruo ASHIKAWA ,  Kazuo HIRAGUCHI

IPC: H04R17/00

Abstract: Provided is a piezoelectric element capable of preventing the occurrence of poor connection to an electrode layer.
A piezoelectric element includes a piezoelectric layer, electrode layers formed on both sides of the piezoelectric layer, and a protective layer laminated on a surface of the electrode layer opposite to a surface on a piezoelectric layer side, in which the piezoelectric element includes a conductive foil laminated on a surface of the protective layer opposite to the electrode layer, the protective layer has a hole that penetrates from a surface to the electrode layer, the conductive foil includes an opening portion at a position that overlaps with the hole of the protective layer in a surface direction, the piezoelectric element includes a filling member consisting of a conductive material, which is formed on at least a part of a surface of the conductive foil from insides of the hole of the protective layer and an opening portion of the conductive foil and is electrically connected to the electrode layer and the conductive foil, and a covering member that covers the filling member and the conductive foil, the covering member has a through-hole at a position that does not overlap with the filling member in the surface direction, and the piezoelectric element includes a conductive member, which is inserted into the through-hole of the covering member and electrically connected to the conductive foil.

公开(公告)号：US20220238785A1

公开(公告)日：2022-07-28

申请号：US17720499

申请日：2022-04-14

Applicant: FUJIFILM Corporation

Inventor： Yusuke KAGAWA ,  Teruo ASHIKAWA ,  Kazuo HIRAGUCHI

IPC: H01L41/053 ,  H01L41/047 ,  H01L41/18 ,  H01L41/23 ,  H04R17/00

Abstract: Provided is a piezoelectric element capable of reliably performing an electrical connection to an electrode layer. A piezoelectric element includes a piezoelectric layer, electrode layers formed on both sides of the piezoelectric layer, and a protective layer laminated on a surface of the electrode layer opposite to a surface on the polymer composite piezoelectric body side. The protective layer has a hole that penetrates from the surface to the electrode layer. The piezoelectric element further includes a filling member consisting of a conductive material, which is formed from the inside of the hole to a part of a surface of the protective layer and is electrically connected to the electrode layer, a conductive member which covers at least a part of the filling member and is electrically connected to the filling member, and a fixing member for fixing the conductive member.

公开(公告)号：US20150043105A1

公开(公告)日：2015-02-12

申请号：US14523953

申请日：2014-10-27

Applicant: FUJIFILM CORPORATION

Inventor： Teruo ASHIKAWA

IPC: G11B23/50 ,  G11B19/26

CPC classification number: G11B23/502 ,  G11B5/41 ,  G11B19/26

Abstract: A head cleaning device includes: a wiper member formed in an elongate shape and having a wiper anchoring portion anchored so as not to move in a tape width direction; and a support member that includes a wiper entrainment portion about which the wiper member is entrained so as to double back, that causes the wiper entrainment portion to move in the tape width direction so that a surface of the wiper member at an opposite side of the wiper entrainment portion from the wiper anchoring portion wipes a head that performs at least one of writing information to, or reading information from, a recording tape.

Abstract translation: 头清洁装置包括：擦拭器构件，其形成为细长形状并具有锚固以便沿带宽度方向移动的刮水器锚固部分; 以及支撑构件，其包括擦拭器夹带部分，擦拭器构件夹在所述擦拭器夹带部分上，以便双重向后，这导致擦拭器夹带部分沿带宽度方向移动，使得擦拭器构件的表面在 来自擦拭器固定部分的擦拭器夹带部分擦拭执行写入信息或从记录带读取信息中的至少一个的头部。