# US 2025/0149064 A1 · Magnetic recording/reproducing device and control method of magnetic recording/reproducing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0149064 A1 - Document ID: US20250149064A1 - Status: Published application - Kind: A1 - Application number: 19/012,273 - Filed: 2025-01-07 - Published: 2025-05-08 - Earliest claimed: 2023-09-20 - Assignees: Kabushiki Kaisha Toshiba; Toshiba Electronic Devices & Storage Corporation - Applicants: Kabushiki Kaisha Toshiba; Toshiba Electronic Devices & Storage Corporation - Inventors: Kaori KIMURA - Web page: https://patentgrep.com/patent/US20250149064A1 ## CPC - G11B 5/596: for track following on disks {(G11B5/5526, G11B5/5552, G11B5/5565, G11B5/5582 take precedence)} - G11B 5/6011: {Control of flying height} - G11B 5/725: containing a lubricant {, e.g. organic compounds (inorganic carbon protective coating G11B5/727)} - G11B 2005/0021: {Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal} - 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 magnetic recording/reproducing device includes a housing which accommodates a magnetic recording medium, and a magnetic head which records or reproduces magnetic data relative the magnetic recording medium, and a synthetic adsorbent provided in the housing and containing a polystyrene-divinylbenzene copolymer. ## Claims ### Claim 1 A control method of a magnetic recording/reproducing device comprising a heat-assisted magnetic recording head comprising a heater controlling a head flying height of the heat-assisted magnetic recording head, and a heat-assisted magnetic recording medium comprising a recording surface on which a lubricant is provided, the method including recording by the heat-assisted magnetic recording head at a first height of a head flying height, controlling the heater to change the head flying height to a second height which is higher than the first height, and filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant by operating the heat-assisted magnetic recording head, and forming a lubricant filling area having the second height. ### Claim 2 (depends on 1) The method of claim 1, wherein the first height is greater than or equal to a greatest flying height in a zone for recording. ### Claim 3 (depends on 1) The method of claim 1, wherein the second height is greater than or equal to a greatest flying height in a zone for recording after changing the head flying height. ### Claim 4 (depends on 1) The method of claim 1, wherein the lubricant is applied to the heat-assisted magnetic recording head surface by changing the head flying height to the second height which is higher than the first height. ### Claim 5 (depends on 1) The method of claim 1, wherein the operating the heat-assisted magnetic recording head is seeking the heat-assisted magnetic recording head on the recording surface. ### Claim 6 (depends on 1) The method of claim 1, wherein the operating the heat-assisted magnetic recording head is to perform heat-assisted magnetic recording operation on the recording surface. ### Claim 7 (depends on 1) The method of claim 1, wherein a track on which the heat-assisted magnetic recording head is operated is same as a track on which heat-assisted magnetic recording is performed lastly. ### Claim 8 (depends on 1) The method of claim 1, wherein a track on which the heat-assisted magnetic recording head is operated is a track prepared for exclusive use. ### Claim 9 (depends on 1) The method of claim 1, wherein the magnetic recording/reproducing device contains an oxygen gas in a range greater than or equal to 1 volume percent and less than or equal to 20 volume percent. ### Claim 10 A magnetic recording/reproducing device comprising: a heat-assisted magnetic recording head having a heater controlling a head flying height of the heat-assisted magnetic recording head; a heat-assisted magnetic recording medium including a recording surface on which a lubricant is provided; a flying height controller which controls the heater to change a head flying height to a second height which is higher than a first height after recording by the heat-assisted magnetic recording head at the first height of the head flying height; and a filling operation controller which fills a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant by operating the heat-assisted magnetic recording head on the recording surface, and forms a lubricant filling area having the second height. ### Claim 11 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein the first height is greater than or equal to a greatest flying height in a zone configured to record. ### Claim 12 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein the second height is greater than or equal to a greatest flying height in a zone configured to record after changing the head flying height. ### Claim 13 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein the lubricant is applied to the heat-assisted magnetic recording head surface by changing the head flying height to the second height which is higher than the first height. ### Claim 14 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein the operating the heat-assisted magnetic recording head is seeking on the recording surface. ### Claim 15 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein the operating the heat-assisted magnetic recording head is to perform heat-assisted magnetic recording operation on the recording surface. ### Claim 16 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein a track on which the heat-assisted magnetic recording head is operated is same as a track on which heat-assisted magnetic recording is performed lastly. ### Claim 17 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein a track on which the heat-assisted magnetic recording head is operated is a track prepared for exclusive use. ### Claim 18 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein an oxygen gas is contained in a range greater than or equal to 1 volume percent and less than or equal to 20 volume percent. ### Claim 19 (depends on 1) The method of claim 1, wherein the filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant is performed once a period of time. ### Claim 20 (depends on 1) The method of claim 1, wherein the filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant is performed when the heat-assisted magnetic recording head passes through a projection which is on the surface of the heat-assisted magnetic recording medium and is registered in a memory. ### Claim 21 (depends on 1) The method of claim 1, wherein the filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant is performed when an idle state continues for more than a period time. ### Claim 22 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein the filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant is performed once a period of time. ### Claim 23 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein the filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant is performed when the heat-assisted magnetic recording head passes through a projection which is on the surface of the heat-assisted magnetic recording medium and is registered in a memory. ### Claim 24 (depends on 10) The magnetic recording/reproducing device of claim 10, wherein the filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant is performed when an idle state continues for more than a period time. ### Claim 25 A control method of a magnetic recording/reproducing device comprising a heat-assisted magnetic recording head, and a heat-assisted magnetic recording medium comprising a recording surface on which a lubricant is provided, the method including changing a head flying height of a first height to a second height which is higher than the first height, and filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant by operating the heat-assisted magnetic recording head, and forming a lubricant filling area having the second height. ### Claim 26 (depends on 25) The method of claim 25, wherein the heat-assisted magnetic recording head further comprises a heater controlling a head flying height of the heat-assisted magnetic recording head, and the head flying height is changed by controlling the heater. ### Claim 27 (depends on 25) The method of claim 25, wherein the lubricant is applied to the heat-assisted magnetic recording head surface by changing the head flying height to the second height which is higher than the first height. ### Claim 28 (depends on 25) The method of claim 25, wherein the operating the heat-assisted magnetic recording head is seeking the heat-assisted magnetic recording head on the recording surface. ### Claim 29 (depends on 25) The method of claim 25, wherein the operating the heat-assisted magnetic recording head is to perform heat-assisted magnetic recording operation on the recording surface. ### Claim 30 (depends on 25) The method of claim 25, wherein a track on which the heat-assisted magnetic recording head is operated is same as a track on which heat-assisted magnetic recording is performed lastly. ### Claim 31 (depends on 25) The method of claim 25, wherein a track on which the heat-assisted magnetic recording head is operated is a track prepared for exclusive use. ### Claim 32 (depends on 25) The method of claim 25, wherein the magnetic recording/reproducing device contains an oxygen gas in a range greater than or equal to 1 volume percent and less than or equal to 20 volume percent. ### Claim 33 (depends on 25) The method of claim 25, wherein the filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant is performed once a period of time. ### Claim 34 (depends on 25) The method of claim 25, wherein the filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant is performed when the heat-assisted magnetic recording head passes through a projection which is on the surface of the heat-assisted magnetic recording medium and is registered in a memory. ### Claim 35 (depends on 25) The method of claim 25, wherein the filling a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant is performed when an idle state continues for more than a period time. ### Claim 36 (depends on 25) The method of claim 25, wherein a heat-assisted magnetic recording head; a heat-assisted magnetic recording medium including a recording surface on which a lubricant is provided; a flying height controller which changes a head flying height of a first height to a second height which is higher than a first height; and a filling operation controller which fills a portion located between the heat-assisted magnetic recording head and the recording surface with the lubricant by operating the heat-assisted magnetic recording head on the recording surface, and forms a lubricant filling area having the second height.