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	Heat-assisted magnetic recording device capable of detecting degradation of nft by measuring back-heat from medium
	MENDONSA, RIYAN; TRANTHAM, JON D.; KIELY, JAMES DILLON; LI, PENG; CHRISTENSEN, JOSHUA WARD
	2018-11-15
著作权人	SEAGATE TECHNOLOGY LLC
专利号	US20180330754A1
国家	美国
文献子类	发明申请
其他题名	Heat-assisted magnetic recording device capable of detecting degradation of nft by measuring back-heat from medium
英文摘要	An apparatus comprises a laser diode configured to generate light during a write operation. A slider comprises a near-field transducer (NFT) and an optical waveguide. The slider is configured for heat-assisted magnetic recording and to communicate the light to the NFT via the waveguide. A writer heater of the slider is configured to receive power during the write operation. A thermal sensor is situated at or near an air bearing surface of the slider. The thermal sensor is configured to produce a sensor signal in response to sensing back-heating from the medium while the NFT generates heat during a write operation. Circuitry, coupled to the thermal sensor, is configured to compare the sensor signal to a threshold and generate an output signal indicative of degradation of NFT performance in response to the sensor signal exceeding the threshold.
公开日期	2018-11-15
申请日期	2017-05-15
状态	授权
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/59148]
专题	半导体激光器专利数据库
作者单位	SEAGATE TECHNOLOGY LLC
推荐引用方式 GB/T 7714	MENDONSA, RIYAN,TRANTHAM, JON D.,KIELY, JAMES DILLON,et al. Heat-assisted magnetic recording device capable of detecting degradation of nft by measuring back-heat from medium. US20180330754A1. 2018-11-15.

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