# US 2025/0095674 A1 · Disk device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0095674 A1 - Document ID: US20250095674A1 - Status: Published application - Kind: A1 - Application number: 18/589,341 - Filed: 2024-02-27 - Published: 2025-03-20 - Earliest claimed: 2023-09-15 - Assignees: Kabushiki Kaisha Toshiba; Toshiba Electronic Devices & Storage Corporation - Applicants: Kabushiki Kaisha Toshiba; Toshiba Electronic Devices & Storage Corporation - Inventors: Ryogo HOSHI; Takuma KIDO - Web page: https://patentgrep.com/patent/US20250095674A1 ## CPC - G11B 5/4826: {Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive (G11B5/484 takes precedence; details of head housings or structures G11B5/10, G11B5/127; adjustment relative to the record carrier G11B5/56)} - G11B 5/4833: {Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head (G11B5/484 takes precedence)} - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract According to one embodiment, a disk device includes a first adhesive attaching a slider to a suspension. A flexure of the suspension includes an outer surface of a metal plate and an insulator. The insulator surrounds the first adhesive. The insulator includes two first walls, a second wall, and a third wall. The first walls extend closer to each other toward a axis of a carriage. The second wall is spaced apart from the first walls and further away from the axis than the first walls. The third wall is located at a center of the insulator in a circumferential direction and is located between the first walls and the second wall. The third wall is shorter than the second wall. The distance between the second wall and the third wall is shorter than a distance between the first walls and the third wall. ## Claims ### Claim 1 A disk device comprising: a magnetic disk; a slider configured to read and write information from and to the magnetic disk; a carriage configured to rotate about a rotation axis; a suspension that is attached to the carriage; and a first adhesive that attaches the slider to the suspension, wherein the suspension includes a base plate attached to the carriage, a load beam attached to the base plate, and a flexure attached to the load beam; the flexure includes a metal plate, an outer surface of the metal plate to which the first adhesive adheres, and an insulator located on the outer surface to surround at least a part of the first adhesive, the insulator including two first walls extending closer to each other toward the rotation axis, a second wall spaced apart from the two first walls and further away from the rotation axis than the two first walls, and extending across a center of the insulator in a circumferential direction about the rotation axis, and a third wall located at least partially at the center of the insulator in the circumferential direction and located between the two first walls and the second wall, the third wall being shorter in length than the second wall in the circumferential direction; and a distance between the second wall and the third wall is shorter than a distance between each of the two first walls and the third wall. ### Claim 2 (depends on 1) The disk device according to claim 1, wherein the insulator includes a plurality of fourth walls spaced apart from each other and from the two first walls, the second wall, and the third wall, and a labyrinth seal configured to restrict an adhesive from passing through intervals between the two first walls and the plurality of fourth walls. ### Claim 3 (depends on 2) The disk device according to claim 2, wherein each of the two first walls includes a plurality of fifth walls spaced apart from each other, and the labyrinth seal is configured to restrict the adhesive from passing through intervals among the two first walls, the plurality of fourth walls, and the plurality of fifth walls. ### Claim 4 (depends on 1) The disk device according to claim 1, wherein the flexure includes a plurality of pads joined to the slider, and the second wall is located between the first adhesive and the plurality of pads. ### Claim 5 (depends on 4) The disk device according to claim 4, wherein the third wall is located between the first adhesive and the plurality of pads. ### Claim 6 (depends on 1) The disk device according to claim 1, wherein the first adhesive includes a first part located between the two first walls, a second part protruding from the first part to be in-between a first one of the two first walls and the third wall, and a third part protruding from the first part to be in-between a second one of the two first walls and the third wall, and the third wall is located between the second part and the third part. ### Claim 7 (depends on 1) The disk device according to claim 1, further comprising: a second adhesive spaced apart from the first adhesive and the insulator and closer to the rotation axis than the first adhesive and the insulator, the second adhesive attaching the slider to the suspension. ### Claim 8 (depends on 7) The disk device according to claim 7, wherein the first adhesive has a larger volume than the second adhesive. ### Claim 9 (depends on 1) The disk device according to claim 1, wherein the insulator has a plurality of protrusions protruding from the outer surface between the two first walls. ### Claim 10 (depends on 9) The disk device according to claim 9, wherein each of the plurality of protrusions has a cross shape. ### Claim 11 (depends on 1) The disk device according to claim 1, wherein the insulator includes a sixth wall located between the two first walls and apart from the second wall, and the sixth wall has a smaller thickness than each of the two first walls in a direction orthogonal to the outer surface. ### Claim 12 (depends on 1) The disk device according to claim 1, wherein the flexure further includes a first insulating layer formed on the outer surface, a second insulating layer covering the first insulating layer, and a conductive layer interposed between the first insulating layer and the second insulating layer, and the insulator is included in at least one of the first insulating layer and the second insulating layer. ### Claim 13 A disk device comprising: a magnetic disk; a slider configured to read and write information from and to the magnetic disk; a carriage configured to rotate about a rotation axis; a suspension that is attached to the carriage; and an adhesive that attaches the slider to the suspension, wherein the suspension includes a base plate attached to the carriage, a load beam attached to the base plate, and a flexure attached to the load beam, the flexure includes a metal plate, an outer surface of the metal plate to which the adhesive adheres, and an insulator located on the outer surface to surround at least a part of the adhesive, the adhesive includes two extending parts extending closer to each other toward the rotation axis, each of the two extending parts has a first end and a second end further away from the rotation axis than the first end, the first end of a first one of the two extending parts and the first end of a second one of the two extending parts are connected to each other, and the second end of the first one of the two extending parts and the second end of the second one of the two extending parts are spaced apart from each other in a circumferential direction about the rotation axis. ### Claim 14 (depends on 13) The disk device according to claim 13, wherein a part of the insulator is located between the second end of the first one of the two extending parts and the second end of the second one of the two extending parts. ### Claim 15 A disk device comprising: a magnetic disk; a slider configured to read and write information from and to the magnetic disk; a carriage configured to rotate about a rotation axis; a suspension that is attached to the carriage; and an adhesive that attaches the slider to the suspension, wherein the suspension includes a base plate attached to the carriage, a load beam attached to the base plate, and a flexure attached to the load beam, the flexure includes a metal plate, an outer surface of the metal plate to which the adhesive adheres, and an insulator located on the outer surface to surround at least a part of the adhesive, the insulator including a plurality of walls spaced apart from each other, and a labyrinth seal configured to restrict the adhesive from passing through an interval between the plurality of walls.