{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9685576","patent":{"patent_number":"US-9685576","title":"Back side illuminated image sensor with guard ring region reflecting structure","assignee":null,"inventors":[],"filing_date":"2014-10-03T00:00:00.000Z","publication_date":"2017-06-20T00:00:00.000Z","cpc_codes":["H04N","H04N","H04N"],"num_claims":15,"abstract":"A photon detector includes a single photon avalanche diode (SPAD) disposed proximate to a front side of a semiconductor layer. The SPAD includes a multiplication junction that is reversed biased above a breakdown voltage such that light directed into the SPAD through a backside of the semiconductor layer triggers an avalanche multiplication process. A guard ring is disposed in a guard ring region that surrounds the SPAD to isolate the SPAD in the semiconductor layer. A guard ring region reflecting structure is disposed in the guard ring region proximate to the guard ring and proximate to the front side of the semiconductor layer such that light directed into the guard ring region through the backside of the semiconductor layer that bypasses the SPAD is redirected by the guard ring region reflecting structure back into the semiconductor layer and into the SPAD."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Back side illuminated image sensor with guard ring region reflecting structure","description":"A photon detector includes a single photon avalanche diode (SPAD) disposed proximate to a front side of a semiconductor layer. The SPAD includes a multiplication junction that is reversed biased above","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9685576","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-9685576","citation_suggestion":"Patentable. \"Back side illuminated image sensor with guard ring region reflecting structure\" (US-9685576). https://patentable.app/patents/US-9685576","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9685576","json":"https://patentable.app/api/llm-context/US-9685576","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T03:51:33.020Z"}