{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9626990","patent":{"patent_number":"US-9626990","title":"Perpendicular magnetic recording (PMR) writer with hybrid shield layers","assignee":null,"inventors":[],"filing_date":"2016-11-28T00:00:00.000Z","publication_date":"2017-04-18T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B","G11B","G11B","G11B","G11B","G11B","G11B","G11B","G11B"],"num_claims":18,"abstract":"A perpendicular magnetic recording writer with an all wrap around (AWA) shield design wherein one or more of the leading shield, trailing shield, and side shields comprises a magnetic hot seed layer made of a >19 kG to 24 kG material that adjoins a gap layer, and a side of the hot seed layer opposite the gap layer adjoins a high damping magnetic layer made of a 10-16 kG material (or a 16-19 kG material in the trailing shield) having a Gilbert damping parameter a >0.04. In one embodiment, the high damping magnetic layer is FeNiRe with a Re content of 3 to 15 atomic %. The main pole leading and trailing sides may be tapered. Side shields may have a single taper or dual taper structure. Higher writer speed with greater areal density capability is achieved."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Perpendicular magnetic recording (PMR) writer with hybrid shield layers","description":"A perpendicular magnetic recording writer with an all wrap around (AWA) shield design wherein one or more of the leading shield, trailing shield, and side shields comprises a magnetic hot seed layer m","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9626990","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-9626990","citation_suggestion":"Patentable. \"Perpendicular magnetic recording (PMR) writer with hybrid shield layers\" (US-9626990). https://patentable.app/patents/US-9626990","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9626990","json":"https://patentable.app/api/llm-context/US-9626990","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T04:09:51.859Z"}