{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9601140","patent":{"patent_number":"US-9601140","title":"In-situ smear detection and mitigation in heat-assisted magnetic recording head-disk interface","assignee":null,"inventors":[],"filing_date":"2016-05-20T00:00:00.000Z","publication_date":"2017-03-21T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B"],"num_claims":20,"abstract":"A procedure for detecting the presence of contamination at a head-disk interface in a heat- assisted magnetic recording (HAMR) hard disk drive involves flying a head slider over a magnetic-recording disk at a particular fly height, applying an oscillating signal to a heat source associated with a HAMR near-field transducer (NFT) that is located in the slider to dither the spacing between the NFT and the disk, and determining, based on change to a contact detection signal, that contamination has accumulated on the slider, generally, or on the NFT, specifically. Burnishing the contamination from the slider may then be performed, by bringing the slider into contact with the disk."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"In-situ smear detection and mitigation in heat-assisted magnetic recording head-disk interface","description":"A procedure for detecting the presence of contamination at a head-disk interface in a heat- assisted magnetic recording (HAMR) hard disk drive involves flying a head slider over a magnetic-recording d","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9601140","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9601140","citation_suggestion":"Patentable. \"In-situ smear detection and mitigation in heat-assisted magnetic recording head-disk interface\" (US-9601140). https://patentable.app/patents/US-9601140","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9601140","json":"https://patentable.app/api/llm-context/US-9601140","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:00:24.581Z"}