{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8501330","patent":{"patent_number":"US-8501330","title":"Perpendicular magnetic recording media with magnetic anisotropy gradient and local exchange coupling","assignee":null,"inventors":[],"filing_date":"2011-10-11T00:00:00.000Z","publication_date":"2013-08-06T00:00:00.000Z","cpc_codes":["G11B","B82Y","G11B","G11B","G11B","G11B","G11B"],"num_claims":16,"abstract":"A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed thereon, the layer stack including a perpendicular recording layer containing a plurality of columnar-shaped magnetic grains extending perpendicularly to the substrate surface for a length, with a first end distal the surface and a second end proximal the surface, wherein each of the magnetic grains has: (1) a gradient of perpendicular magnetic anisotropy field Hk extending along its length between the first end and second ends; and (2) predetermined local exchange coupling strengths along the length."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Perpendicular magnetic recording media with magnetic anisotropy gradient and local exchange coupling","description":"A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed there","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8501330","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-8501330","citation_suggestion":"Patentable. \"Perpendicular magnetic recording media with magnetic anisotropy gradient and local exchange coupling\" (US-8501330). https://patentable.app/patents/US-8501330","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8501330","json":"https://patentable.app/api/llm-context/US-8501330","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T14:27:36.240Z"}