{ "guild": { "id": "1361349522684510449", "name": "wafer.space Community", "iconUrl": "2025-12_media/fb143eaa45770cbb40493d09b625e98b-09FD1.png" }, "channel": { "id": "1443243481744277565", "type": "GuildPublicThread", "categoryId": "1361349523724570941", "category": "general", "name": "Using gf180mcu_ocd_io in LibreLane", "topic": null }, "dateRange": { "after": "2025-11-30T23:59:59.999+00:00", "before": "2026-01-01T00:00:00+00:00" }, "exportedAt": "2026-05-11T11:21:33.0192587+00:00", "messages": [ { "id": "1446245336598446132", "type": "Default", "timestamp": "2025-12-04T21:02:38.184+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Mmm, I'm having an antenna violations when connecting to the `SEL` signal of the `ocd` IO but I don't see how that would be possible.", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1446245685371338924", "type": "Default", "timestamp": "2025-12-04T21:04:01.338+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Violating rule is `ANT.16_i_ANT.3`", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1446245944331997294", "type": "Default", "timestamp": "2025-12-04T21:05:03.079+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "But (1) the `Metal2` line that connects to that pin is really not that long, like 90 um or so. And (2) there is AFAICT an antenna diode on that input.", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1446248197444993024", "type": "Default", "timestamp": "2025-12-04T21:14:00.263+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "The detail on the error is :\n```\nametal_eff: 202.5162\nratio: 401.817857143\nagate: 0.504\nmax_ratio: 400\npmetal_factor: 0.54\nadiodes: (0)\ndiode_factors: (800)\npmetal: 375.03\n```", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1446248524051120313", "type": "Default", "timestamp": "2025-12-04T21:15:18.132+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "And indeed the gate area is 0.504. But there is an 1 um x 1 um diode on the same node, so the effective area should be 0.504 + 2 * 1 = 2.504 and thus the ratio is 80 which is _way_ below the 400 threshold", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1446252728350277713", "type": "Default", "timestamp": "2025-12-04T21:32:00.515+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Ah ... the DRC rule only consider `nplus + COMP` to be diodes.", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1446252759832858645", "type": "Default", "timestamp": "2025-12-04T21:32:08.021+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "But the IO have `pplus + COMP`", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1446255838577692822", "type": "Default", "timestamp": "2025-12-04T21:44:22.051+00:00", "timestampEdited": "2025-12-04T21:44:32.634+00:00", "callEndedTimestamp": null, "isPinned": false, "content": "Looking at the doc : \n\"\"\"This comp area contained the protection diode and any other drain or source junction connected to this node.\"\"\"\n\nso `pplus + COMP` is perfectly valid and should be included in the `diodes` so I'm pretty sure that KLayout deck is wrong.", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1446255905006948564", "type": "Default", "timestamp": "2025-12-04T21:44:37.889+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "(cc @Leo Moser (mole99) )", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "323371864074485771", "name": "mole99", "discriminator": "0000", "nickname": "Leo Moser (mole99)", "color": null, "isBot": false, "roles": [ { "id": "1423020172595298314", "name": "Mod", "color": null, "position": 1 } ], "avatarUrl": "2025-12_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png" } ], "inlineEmojis": [] }, { "id": "1446405824464556032", "type": "Default", "timestamp": "2025-12-05T07:40:21.473+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Thanks @tnt for the hint!\n\nFrom the DRM:\n\n> 1. Possible repairs to metal antenna nodes, which have a high via count or antenna ratio.\n> a. Add an NCOMP/Substrate diode for NMOS gate, PCOMP/Nwell diode for PMOS gate.\n> b. Break the metal close to the gate and jog the metal to an upper metal level.\n\nSo instead of:\n\n```\ndiode = nplus.and(comp)\n```\n\nI would do:\n\n```\nn_diode = nplus.and(comp).not(nwell)\np_diode = pplus.and(comp).and(nwell)\ndiodes = n_diode || n_diode\n```\n\n(deep nwell not considered.)\n\nDoes that look reasonable to you?", "author": { "id": "323371864074485771", "name": "mole99", "discriminator": "0000", "nickname": "Leo Moser (mole99)", "color": null, "isBot": false, "roles": [ { "id": "1423020172595298314", "name": "Mod", "color": null, "position": 1 } ], "avatarUrl": "2025-12_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" } ], "inlineEmojis": [] }, { "id": "1446408614704054323", "type": "Default", "timestamp": "2025-12-05T07:51:26.718+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "TBH I would think `comp.and(nplus.or(pplus)` would be enough.", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1446408773479698442", "type": "Default", "timestamp": "2025-12-05T07:52:04.573+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Technically if a signal is connected to what's basically a tap, that's also a diffusion that will dissipate charge I would think.", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1446409159745736811", "type": "Default", "timestamp": "2025-12-05T07:53:36.666+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "But it's a rather weird case so the above would work just fine.", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] } ], "messageCount": 13 }