{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:U7ZW6P6TC2LI4LXM67VPN6RKR6","short_pith_number":"pith:U7ZW6P6T","canonical_record":{"source":{"id":"1009.0167","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-09-01T12:06:24Z","cross_cats_sorted":[],"title_canon_sha256":"02f7f51c6b650a95068e07feb922db348befb17e2345c4ff6fec23250f469a82","abstract_canon_sha256":"8f14a0362c1e4e54becb4eba74cf859ddd5b0bbf86bb8de6ed179c025300b9be"},"schema_version":"1.0"},"canonical_sha256":"a7f36f3fd316968e2eecf7eaf6fa2a8fadeacf9ad8a968405290fa231bc0e46d","source":{"kind":"arxiv","id":"1009.0167","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.0167","created_at":"2026-05-18T04:28:56Z"},{"alias_kind":"arxiv_version","alias_value":"1009.0167v3","created_at":"2026-05-18T04:28:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.0167","created_at":"2026-05-18T04:28:56Z"},{"alias_kind":"pith_short_12","alias_value":"U7ZW6P6TC2LI","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"U7ZW6P6TC2LI4LXM","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"U7ZW6P6T","created_at":"2026-05-18T12:26:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:U7ZW6P6TC2LI4LXM67VPN6RKR6","target":"record","payload":{"canonical_record":{"source":{"id":"1009.0167","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-09-01T12:06:24Z","cross_cats_sorted":[],"title_canon_sha256":"02f7f51c6b650a95068e07feb922db348befb17e2345c4ff6fec23250f469a82","abstract_canon_sha256":"8f14a0362c1e4e54becb4eba74cf859ddd5b0bbf86bb8de6ed179c025300b9be"},"schema_version":"1.0"},"canonical_sha256":"a7f36f3fd316968e2eecf7eaf6fa2a8fadeacf9ad8a968405290fa231bc0e46d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:28:56.694089Z","signature_b64":"BA5COHnn8Bqa7xXy5AUxzA5XD+HxteqVddIrgZdg5NVHl6+WK0QNDcX92U50amADjvoyMW7we8MyuzlS2RWoAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a7f36f3fd316968e2eecf7eaf6fa2a8fadeacf9ad8a968405290fa231bc0e46d","last_reissued_at":"2026-05-18T04:28:56.693607Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:28:56.693607Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1009.0167","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:28:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BiI1jQtFSxLZYavKgpDSzakslWHhHXX4YSoZO8Jz3FgVQ3EWa1fngGk+tfyMP2++d49clMOsA8JqMxwxAYCSDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T22:34:34.079376Z"},"content_sha256":"e5ec93e5e435ad57c537b4cb9fb4f665b60b86249f546db89db6f5159ae2fcdc","schema_version":"1.0","event_id":"sha256:e5ec93e5e435ad57c537b4cb9fb4f665b60b86249f546db89db6f5159ae2fcdc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:U7ZW6P6TC2LI4LXM67VPN6RKR6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Aluminum Hard Mask Technique for the Fabrication of High-Quality Submicron Nb/Al-AlOx/Nb Josephson Junctions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. V. Ustinov, Christoph Kaiser, J. Lisenfeld, J. M. Meckbach, K. Ilin, M. Siegel, R. Sch\\\"afer","submitted_at":"2010-09-01T12:06:24Z","abstract_excerpt":"We have developed a combined photolithography and electron-beam lithography fabrication process for sub-\\mum to \\mum-size Nb/Al-AlOx/Nb Josephson junctions. In order to define the junction size and protect its top electrode during anodic oxidation, we developed and used the new concept of an aluminum hard mask. Josephson junctions of sizes down to 0.5 \\mum2 have been fabricated and thoroughly characterized. We found that they have a very high quality, which is witnessed by the IV curves with quality parameters Vm > 50 mV and Vgap = 2.8 mV at 4.2 K, as well as IcRN products of 1.75-1.93 mV obta"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.0167","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:28:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IaZfglwvPH8xPRUysMyS/G39YiRZKjZH6ElYHxLEdremvSjOpmm1fugBwQRWFjTFhRCPhV+GCo7nv83xZKJFCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T22:34:34.079735Z"},"content_sha256":"e4a8705a6f8e2862bc75d37532373fd72ea6184a0151f9338c66eec91fdf2b4d","schema_version":"1.0","event_id":"sha256:e4a8705a6f8e2862bc75d37532373fd72ea6184a0151f9338c66eec91fdf2b4d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U7ZW6P6TC2LI4LXM67VPN6RKR6/bundle.json","state_url":"https://pith.science/pith/U7ZW6P6TC2LI4LXM67VPN6RKR6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U7ZW6P6TC2LI4LXM67VPN6RKR6/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-01T22:34:34Z","links":{"resolver":"https://pith.science/pith/U7ZW6P6TC2LI4LXM67VPN6RKR6","bundle":"https://pith.science/pith/U7ZW6P6TC2LI4LXM67VPN6RKR6/bundle.json","state":"https://pith.science/pith/U7ZW6P6TC2LI4LXM67VPN6RKR6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U7ZW6P6TC2LI4LXM67VPN6RKR6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:U7ZW6P6TC2LI4LXM67VPN6RKR6","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"8f14a0362c1e4e54becb4eba74cf859ddd5b0bbf86bb8de6ed179c025300b9be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-09-01T12:06:24Z","title_canon_sha256":"02f7f51c6b650a95068e07feb922db348befb17e2345c4ff6fec23250f469a82"},"schema_version":"1.0","source":{"id":"1009.0167","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.0167","created_at":"2026-05-18T04:28:56Z"},{"alias_kind":"arxiv_version","alias_value":"1009.0167v3","created_at":"2026-05-18T04:28:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.0167","created_at":"2026-05-18T04:28:56Z"},{"alias_kind":"pith_short_12","alias_value":"U7ZW6P6TC2LI","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"U7ZW6P6TC2LI4LXM","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"U7ZW6P6T","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:e4a8705a6f8e2862bc75d37532373fd72ea6184a0151f9338c66eec91fdf2b4d","target":"graph","created_at":"2026-05-18T04:28:56Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We have developed a combined photolithography and electron-beam lithography fabrication process for sub-\\mum to \\mum-size Nb/Al-AlOx/Nb Josephson junctions. In order to define the junction size and protect its top electrode during anodic oxidation, we developed and used the new concept of an aluminum hard mask. Josephson junctions of sizes down to 0.5 \\mum2 have been fabricated and thoroughly characterized. We found that they have a very high quality, which is witnessed by the IV curves with quality parameters Vm > 50 mV and Vgap = 2.8 mV at 4.2 K, as well as IcRN products of 1.75-1.93 mV obta","authors_text":"A. V. Ustinov, Christoph Kaiser, J. Lisenfeld, J. M. Meckbach, K. Ilin, M. Siegel, R. Sch\\\"afer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-09-01T12:06:24Z","title":"Aluminum Hard Mask Technique for the Fabrication of High-Quality Submicron Nb/Al-AlOx/Nb Josephson Junctions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.0167","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:e5ec93e5e435ad57c537b4cb9fb4f665b60b86249f546db89db6f5159ae2fcdc","target":"record","created_at":"2026-05-18T04:28:56Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"8f14a0362c1e4e54becb4eba74cf859ddd5b0bbf86bb8de6ed179c025300b9be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-09-01T12:06:24Z","title_canon_sha256":"02f7f51c6b650a95068e07feb922db348befb17e2345c4ff6fec23250f469a82"},"schema_version":"1.0","source":{"id":"1009.0167","kind":"arxiv","version":3}},"canonical_sha256":"a7f36f3fd316968e2eecf7eaf6fa2a8fadeacf9ad8a968405290fa231bc0e46d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a7f36f3fd316968e2eecf7eaf6fa2a8fadeacf9ad8a968405290fa231bc0e46d","first_computed_at":"2026-05-18T04:28:56.693607Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:28:56.693607Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BA5COHnn8Bqa7xXy5AUxzA5XD+HxteqVddIrgZdg5NVHl6+WK0QNDcX92U50amADjvoyMW7we8MyuzlS2RWoAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:28:56.694089Z","signed_message":"canonical_sha256_bytes"},"source_id":"1009.0167","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e5ec93e5e435ad57c537b4cb9fb4f665b60b86249f546db89db6f5159ae2fcdc","sha256:e4a8705a6f8e2862bc75d37532373fd72ea6184a0151f9338c66eec91fdf2b4d"],"state_sha256":"ce8c5a267fda25dbd2de5b23beae2cda2ebf1723c6e97a380445c28939baa517"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s5icCLW6h33AwuYH23ErYfQ1Bo9pferecHN3Jh8xq8T4kqwKz351xCDvWr7reI1HFoXk5wZcoHz3b3C2hq55BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T22:34:34.081981Z","bundle_sha256":"25263dc5802c6328b34a66ce513c5a1e21261eb7b50b06af6281bd2885149458"}}