{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9831158","patent":{"patent_number":"US-9831158","title":"Lead frame and semiconductor device","assignee":null,"inventors":[],"filing_date":"2016-09-01T00:00:00.000Z","publication_date":"2017-11-28T00:00:00.000Z","cpc_codes":["H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L","H01L"],"num_claims":26,"abstract":"A semiconductor device includes a lead frame; a semiconductor chip mounted on the lead frame; and an encapsulation resin, wherein a convexo-concave portion including a plurality of concave portions is provided at a covered portion of the lead frame that is covered by the encapsulation resin, wherein the planer shape of each of the concave portions is a circle, the diameter of which is greater than or equal to 0.020 mm and less than or equal to 0.060 mm, or a polygon, the diameter of whose circumcircle is greater than or equal to 0.020 mm and less than or equal to 0.060 mm, and wherein a ratio S/S0 is greater than or equal to 1.7 where “S” is a surface area of the convexo-concave portion that is formed at a flat surface whose surface area is “S0”."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Lead frame and semiconductor device","description":"A semiconductor device includes a lead frame; a semiconductor chip mounted on the lead frame; and an encapsulation resin, wherein a convexo-concave portion including a plurality of concave portions is","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9831158","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-9831158","citation_suggestion":"Patentable. \"Lead frame and semiconductor device\" (US-9831158). https://patentable.app/patents/US-9831158","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9831158","json":"https://patentable.app/api/llm-context/US-9831158","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:32:52.885Z"}