{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9825085","patent":{"patent_number":"US-9825085","title":"Formation of buried color filters in a back side illuminated image sensor using an etching-stop layer","assignee":null,"inventors":[],"filing_date":"2017-01-19T00:00:00.000Z","publication_date":"2017-11-21T00:00:00.000Z","cpc_codes":["H01L","H01L","H01L"],"num_claims":20,"abstract":"A semiconductor image sensor includes a substrate having a first side and a second side that is opposite the first side. An interconnect structure is disposed over the first side of the substrate. A plurality of radiation-sensing regions is located in the substrate. The radiation-sensing regions are configured to sense radiation that enters the substrate from the second side. A buffer layer is disposed over the second side of the substrate. A plurality of elements is disposed over the buffer layer. The elements and the buffer layer have different material compositions. A plurality of light-blocking structures is disposed over the plurality of elements, respectively. The radiation-sensing regions are respectively aligned with a plurality of openings defined by the light-blocking structures, the elements, and the buffer layer."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Formation of buried color filters in a back side illuminated image sensor using an etching-stop layer","description":"A semiconductor image sensor includes a substrate having a first side and a second side that is opposite the first side. An interconnect structure is disposed over the first side of the substrate. A p","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9825085","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-9825085","citation_suggestion":"Patentable. \"Formation of buried color filters in a back side illuminated image sensor using an etching-stop layer\" (US-9825085). https://patentable.app/patents/US-9825085","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9825085","json":"https://patentable.app/api/llm-context/US-9825085","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T16:30:01.393Z"}