{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8471331","patent":{"patent_number":"US-8471331","title":"Method of making an insulated gate semiconductor device with source-substrate connection and structure","assignee":null,"inventors":[],"filing_date":"2011-08-15T00:00:00.000Z","publication_date":"2013-06-25T00:00:00.000Z","cpc_codes":["H01L"],"num_claims":20,"abstract":"In one embodiment, a source-down vertical insulated gate field effect transistor includes a source contact that is buried within a trench gate structure. Dopant of a first conductivity type is diffused from the conductive source contact into an adjacent semiconductor layer that has a second and opposite conductivity type to form source regions. A self-aligned metal contact is formed within the trench gate structure to short the source contact and the source regions to an underlying substrate."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method of making an insulated gate semiconductor device with source-substrate connection and structure","description":"In one embodiment, a source-down vertical insulated gate field effect transistor includes a source contact that is buried within a trench gate structure. Dopant of a first conductivity type is diffuse","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8471331","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-8471331","citation_suggestion":"Patentable. \"Method of making an insulated gate semiconductor device with source-substrate connection and structure\" (US-8471331). https://patentable.app/patents/US-8471331","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8471331","json":"https://patentable.app/api/llm-context/US-8471331","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T18:49:05.425Z"}