{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9805804","patent":{"patent_number":"US-9805804","title":"Semiconductor memory device and data erasing method","assignee":null,"inventors":[],"filing_date":"2016-05-27T00:00:00.000Z","publication_date":"2017-10-31T00:00:00.000Z","cpc_codes":["G11C","G11C","G11C","G11C"],"num_claims":10,"abstract":"A semiconductor memory device includes a memory cell array including a plurality of groups of memory cells above a substrate, the groups including a first group and a second group, each of the first and second groups including a first memory string and a second memory string, the first memory string including first memory cells that are disposed in a first layer, the second memory string including second memory cell that are disposed in a second layer above the first layer, and a controller configured to perform an erasing operation on the memory cells, the erasing operation including a verifying operation on the memory cells to determine on a layer by layer basis whether the memory cells failed to erase data stored therein."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Semiconductor memory device and data erasing method","description":"A semiconductor memory device includes a memory cell array including a plurality of groups of memory cells above a substrate, the groups including a first group and a second group, each of the first a","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9805804","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-9805804","citation_suggestion":"Patentable. \"Semiconductor memory device and data erasing method\" (US-9805804). https://patentable.app/patents/US-9805804","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9805804","json":"https://patentable.app/api/llm-context/US-9805804","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:09:12.246Z"}