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公开(公告)号：US11869543B2
公开(公告)日：2024-01-09
申请号：US17942439
申请日：2022-09-12
Inventor： Kota Tokuda , Nobuhiro Yamamoto , Taichi Okano , Yoshihiro Amemiya , Shinra Yamanaka
CPC classification number: G11B33/122 , G06F3/0676 , G11B5/54 , H05K1/118 , G11B33/022 , G11B2220/2516
Abstract: According to one embodiment, a disk device includes a magnetic disk, a magnetic head, a first FPC, and a second FPC. The first FPC includes first terminals. The magnetic head is mounted on the first FPC and electrically connected to at least one of the first terminals. The second FPC includes a surface, second terminals on the surface, and a first ground plane. The second terminals are individually bonded to the corresponding first terminals with a conductive bonding material. The first ground plane covers at least one of the second terminals in a direction orthogonal to the surface. The second terminals include a first read terminal through which an electric signal representing information read from the magnetic disk by the magnetic head passes. The first ground plane is located apart from at least a part of the first read terminal in a direction along the surface.
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公开(公告)号：US12198734B2
公开(公告)日：2025-01-14
申请号：US18489456
申请日：2023-10-18
Inventor： Kota Tokuda , Yoshihiro Amemiya , Shinra Yamanaka , Nobuhiro Yamamoto , Taichi Okano
Abstract: A disk device according to one embodiment includes a magnetic disk, a magnetic head, and a flexible printed circuit board. The flexible printed circuit board is electrically connected to the magnetic head. The flexible printed circuit board includes a first layer, a second layer having conductive property, and a third layer having insulation property. The first layer includes a first surface having insulation property. The second layer overlays the first surface, and includes a first conductor and a second conductor spaced from the first conductor. The third layer covers at least a part of the first surface and at least a part of the second layer. The flexible printed circuit board is provided with a first hole that is located between the first conductor and the second conductor with spacing from the second layer and penetrates the third layer.
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公开(公告)号：US20230206957A1
公开(公告)日：2023-06-29
申请号：US17942439
申请日：2022-09-12
Inventor： Kota TOKUDA , Nobuhiro Yamamoto , Taichi Okano , Yoshihiro Amemiya , Shinra Yamanaka
CPC classification number: G11B33/122 , H05K1/118 , G11B5/54 , G06F3/0676 , G11B33/022
Abstract: according to one embodiment, a disk device includes a magnetic disk, a magnetic head, a first FPC, and a second FPC. The first FPC includes first terminals. The magnetic head is mounted on the first FPC and electrically connected to at least one of the first terminals. The second FPC includes a surface, second terminals on the surface, and a first ground plane. The second terminals are individually bonded to the corresponding first terminals with a conductive bonding material. The first ground plane covers at least one of the second terminals in a direction orthogonal to the surface. The second terminals include a first read terminal through which an electric signal representing information read from the magnetic disk by the magnetic head passes. The first ground plane is located apart from at least a part of the first read terminal in a direction along the surface.
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公开(公告)号：US10482910B2
公开(公告)日：2019-11-19
申请号：US16101757
申请日：2018-08-13
Inventor： Norio Yoshikawa , Yoshihiro Amemiya
IPC: G11B5/48
Abstract: According to one embodiment, a flexible printed wiring board includes a base insulation layer, first wirings W1 on the base insulation layer, an intermediate insulation layer overlapped with the first wirings, connection pads on the intermediate insulation layer, a cover insulation layer overlapped with the connection pads and the intermediate insulation layer and including openings through which the connection pads are exposed to the cover layer, and conductive vias MT electrically connecting the first wirings to at least a part of the connection pads respectively. The conductive vias are overlapped with the connection pads in a thickness direction of the flexible printed wiring board.
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Patent Agency Ranking
公开(公告)号：US10002624B1
公开(公告)日：2018-06-19
申请号：US15680343
申请日：2017-08-18
Applicant: Kabushiki Kaisha Toshiba
Inventor： Yoshihiro Amemiya
CPC classification number: G11B5/09 , G11B5/012 , G11B5/02 , G11B20/10027 , G11B2005/0013 , G11B2005/0016 , G11B2005/0018
Abstract: According to one embodiment, a magnetic disk device includes a disk, a head configured to write data to the disk, and an integrated circuit configured to acquire a detection signal indicative of a first pattern of a first frequency of write data, change a first current of a second pattern of a write current corresponding to the first pattern on the basis of the detection signal, detect a third pattern of a second frequency which is greater than the first frequency from the write data, change a second current of a fourth pattern of the write current corresponding to the third pattern, and output the write current with the changed first current and the changed second current to the head.
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公开(公告)号：US11823717B2
公开(公告)日：2023-11-21
申请号：US17689873
申请日：2022-03-08
Inventor： Kota Tokuda , Yoshihiro Amemiya , Shinra Yamanaka , Nobuhiro Yamamoto , Taichi Okano
CPC classification number: G11B33/122 , H05K1/05 , H05K1/118 , G11B5/54
Abstract: A disk device according to one embodiment includes a magnetic disk, a magnetic head, and a flexible printed circuit board. The flexible printed circuit board is electrically connected to the magnetic head. The flexible printed circuit board includes a first layer, a second layer having conductive property, and a third layer having insulation property. The first layer includes a first surface having insulation property. The second layer overlays the first surface, and includes a first conductor and a second conductor spaced from the first conductor. The third layer covers at least a part of the first surface and at least a part of the second layer. The flexible printed circuit board is provided with a first hole that is located between the first conductor and the second conductor with spacing from the second layer and penetrates the third layer.
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公开(公告)号：US11609285B2
公开(公告)日：2023-03-21
申请号：US17012230
申请日：2020-09-04
Inventor： Yoshihiro Amemiya
IPC: G01R33/12 , G01R1/067 , G01R31/28 , G01R31/309
Abstract: According to one embodiment, a method includes: supplying electrical energy to a first path by an inspection circuit with a short circuit between two first terminals through a first probe; and detecting an electrical characteristic on the first path by the inspection circuit. The two first terminals are included in a plurality of second terminals included in a flexible printed circuit board. The flexible printed circuit board includes: an electronic component including the inspection circuit and a plurality of third terminals; the plurality of second terminals; and a plurality of first wired lines connecting the plurality of second terminals and the plurality of third terminals. The first path is formed by: the two first terminals; two second wired lines connected to the two first terminals among the plurality of first wired lines; and two fourth terminals connected to the two second wired lines among the plurality of third terminals.
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公开(公告)号：US20210286030A1
公开(公告)日：2021-09-16
申请号：US17012230
申请日：2020-09-04
Inventor： Yoshihiro Amemiya
IPC: G01R33/12 , G01R31/309 , G01R31/28 , G01R1/067
Abstract: According to one embodiment, a method includes: supplying electrical energy to a first path by an inspection circuit with a short circuit between two first terminals through a first probe; and detecting an electrical characteristic on the first path by the inspection circuit when the electrical energy is supplied to the first path. The two first terminals are included in a plurality of second terminals included in a flexible printed circuit board. The flexible printed circuit board includes: an electronic component including the inspection circuit and a plurality of third terminals; the plurality of second terminals; and a plurality of first wired lines connecting the plurality of second terminals and the plurality of third terminals. The first path is formed by: the two first terminals; two second wired lines connected to the two first terminals among the plurality of first wired lines; and two fourth terminals connected to the two second wired lines among the plurality of third terminals.
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公开(公告)号：US20190295600A1
公开(公告)日：2019-09-26
申请号：US16101757
申请日：2018-08-13
Inventor： Norio Yoshikawa , Yoshihiro Amemiya
Abstract: According to one embodiment, a flexible printed wiring board includes a base insulation layer, first wirings W1 on the base insulation layer, an intermediate insulation layer overlapped with the first wirings, connection pads on the intermediate insulation layer, a cover insulation layer overlapped with the connection pads and the intermediate insulation layer and including openings through which the connection pads are exposed to the cover layer, and conductive vias MT electrically connecting the first wirings to at least a part of the connection pads respectively. The conductive vias are overlapped with the connection pads in a thickness direction of the flexible printed wiring board.
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