{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9595281","patent":{"patent_number":"US-9595281","title":"Tunable contact detection sensitivity to directly measure clearance of protrusions in magnetic recording heads","assignee":null,"inventors":[],"filing_date":"2015-08-11T00:00:00.000Z","publication_date":"2017-03-14T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B"],"num_claims":20,"abstract":"Embodiments disclosed herein generally relate to contact at the disk by the recording head in a hard disk drive. In one embodiment, a direct current is applied to an element in a HAMR head. An alternating current is then applied to the element over top of the direct current to cause the HAMR head to dither. By monitoring the head signal at the dither frequency, a touchdown or contact of a NFT on a disk may be detected based upon variations in the produced signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Tunable contact detection sensitivity to directly measure clearance of protrusions in magnetic recording heads","description":"Embodiments disclosed herein generally relate to contact at the disk by the recording head in a hard disk drive. In one embodiment, a direct current is applied to an element in a HAMR head. An alterna","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9595281","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-9595281","citation_suggestion":"Patentable. \"Tunable contact detection sensitivity to directly measure clearance of protrusions in magnetic recording heads\" (US-9595281). https://patentable.app/patents/US-9595281","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9595281","json":"https://patentable.app/api/llm-context/US-9595281","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:46:22.520Z"}