{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9697861","patent":{"patent_number":"US-9697861","title":"Magnetic disk substrate with specified changes in height or depth between adjacent raised or lowered portions and an offset portion on a main surface within a range of 92.0 to 97.0% in a radial direction from a center, a magnetic disk with substrate and a magnetic disk device with magnetic disk","assignee":null,"inventors":[],"filing_date":"2015-08-05T00:00:00.000Z","publication_date":"2017-07-04T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B"],"num_claims":8,"abstract":"A magnetic disk substrate having a flat main surface, an end face, and a chamfered face formed between the main surface and the end face. The substrate has an offset portion, present on the main surface within a range of 92.0 to 97.0% in a radial direction from a center of the substrate. A distance from the center of the substrate to the end face of the substrate in a radial direction is 100%, the offset portion being raised or lowered with respect to a virtual straight line connecting two points on the main surface, set at positions of 92.0% and 97.0%. A maximum distance from the virtual straight line to the offset portion in a direction perpendicular to the virtual straight line is a “maximum offset value.”"},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Magnetic disk substrate with specified changes in height or depth between adjacent raised or lowered portions and an offset portion on a main surface within a range of 92.0 to 97.0% in a radial direction from a center, a magnetic disk with substrate and a magnetic disk device with magnetic disk","description":"A magnetic disk substrate having a flat main surface, an end face, and a chamfered face formed between the main surface and the end face. The substrate has an offset portion, present on the main surfa","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9697861","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-9697861","citation_suggestion":"Patentable. \"Magnetic disk substrate with specified changes in height or depth between adjacent raised or lowered portions and an offset portion on a main surface within a range of 92.0 to 97.0% in a radial direction from a center, a magnetic disk with substrate and a magnetic disk device with magnetic disk\" (US-9697861). https://patentable.app/patents/US-9697861","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9697861","json":"https://patentable.app/api/llm-context/US-9697861","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T15:18:10.248Z"}