{ "guild": { "id": "1361349522684510449", "name": "wafer.space Community", "iconUrl": "2026-03_media/fb143eaa45770cbb40493d09b625e98b-09FD1.png" }, "channel": { "id": "1486057912555012167", "type": "GuildPublicThread", "categoryId": "1409660288822673408", "category": "questions", "name": "Is there a DRC violation waiver system?", "topic": null }, "dateRange": { "after": "2026-02-28T23:59:59.999+00:00", "before": "2026-04-01T00:00:00+00:00" }, "exportedAt": "2026-05-11T18:35:02.0206741+00:00", "messages": [ { "id": "1486057912555012167", "type": "Default", "timestamp": "2026-03-24T17:43:35.974+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Is passing DRC strictly required to tapeout? Is there any waiver system? For example I want to make topmetal \"pads\" smaller than design rule pad sizes, as I want to post-process dies/wafers to add additional layers to the design.", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1486068233760145551", "type": "Default", "timestamp": "2026-03-24T18:24:36.741+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "@Matt Venn your comments were helpful \ud83d\ude42", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "492702620759228416", "name": "mattvenn", "discriminator": "0000", "nickname": "Matt Venn", "color": null, "isBot": false, "roles": [ { "id": "1423020172595298314", "name": "Mod", "color": null, "position": 1 } ], "avatarUrl": "2026-03_media/aa8560ba40f1f3d339d044dee6970630-97A62.png" } ], "inlineEmojis": [ { "id": "", "name": "\ud83d\ude42", "code": "slight_smile", "isAnimated": false, "imageUrl": "2026-03_media/1f642-83E8A.svg" } ] }, { "id": "1486068361367388261", "type": "Default", "timestamp": "2026-03-24T18:25:07.165+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Though I assume your \"yes\" was in regards to \"strictly must pass DRC\"", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1486070350071726302", "type": "Default", "timestamp": "2026-03-24T18:33:01.309+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "I thought I was in the tt discord", "author": { "id": "492702620759228416", "name": "mattvenn", "discriminator": "0000", "nickname": "Matt Venn", "color": null, "isBot": false, "roles": [ { "id": "1423020172595298314", "name": "Mod", "color": null, "position": 1 } ], "avatarUrl": "2026-03_media/aa8560ba40f1f3d339d044dee6970630-97A62.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1486070459870085201", "type": "Default", "timestamp": "2026-03-24T18:33:27.487+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Where the answer is no, but I don't know for wafer.space", "author": { "id": "492702620759228416", "name": "mattvenn", "discriminator": "0000", "nickname": "Matt Venn", "color": null, "isBot": false, "roles": [ { "id": "1423020172595298314", "name": "Mod", "color": null, "position": 1 } ], "avatarUrl": "2026-03_media/aa8560ba40f1f3d339d044dee6970630-97A62.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1486085485435818226", "type": "Default", "timestamp": "2026-03-24T19:33:09.861+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "For last run, they wouldn't even waive the antenna rule \ud83d\ude05", "author": { "id": "596068704471482370", "name": "246tnt", "discriminator": "0000", "nickname": "tnt", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [ { "id": "", "name": "\ud83d\ude05", "code": "sweat_smile", "isAnimated": false, "imageUrl": "2026-03_media/1f605-42B43.svg" } ] }, { "id": "1486106831280668733", "type": "Default", "timestamp": "2026-03-24T20:57:59.107+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "that makes sense though, because of charging during plasma steps", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1486107121480106045", "type": "Default", "timestamp": "2026-03-24T20:59:08.296+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "a discharge event will cause spallation and can cover not only your wafer with particles, but the entire chamber... leading to later batches to get particle contam", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [ { "emoji": { "id": "", "name": "\ud83d\ude2e", "code": "open_mouth", "isAnimated": false, "imageUrl": "2026-03_media/1f62e-FE396.svg" }, "count": 1, "users": [ { "id": "738396032295108721", "name": "bailey8889", "discriminator": "0000", "nickname": "bailey", "color": null, "isBot": false, "avatarUrl": "2026-03_media/0-EB806.png" } ] } ], "mentions": [], "inlineEmojis": [] }, { "id": "1486713628412481717", "type": "Default", "timestamp": "2026-03-26T13:09:10.817+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Tim wants wsrun-2 to follow the DRC rules much more strictly, as per the PDK docs.\n\nThe only rule I can find for the pad layer is for the top metal overlap: https://gf180mcu-pdk.readthedocs.io/en/latest/physical_verification/design_manual/drm_09_1.html\nAll the other rules are guidelines: https://gf180mcu-pdk.readthedocs.io/en/latest/physical_verification/design_manual/drm_09_2.html\nHowever, as there is no mention of a minimum pad width anywhere, wafer.space has to assume a minimum width of 40x40 according to PAD.1.", "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": "2026-03_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1486979241148158012", "type": "Default", "timestamp": "2026-03-27T06:44:37.828+00:00", "timestampEdited": "2026-03-27T06:45:52.341+00:00", "callEndedTimestamp": null, "isPinned": false, "content": "Passing DRC is strictly required for tapeout, there is no waiver system and there won't be any support for waivers.", "author": { "id": "169786952432746498", "name": "mithro_", "discriminator": "0000", "nickname": "Tim 'mithro' Ansell", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/9679bb77da48d47c905b398d98a83780-75B68.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1486980111726018680", "type": "Default", "timestamp": "2026-03-27T06:48:05.39+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "@Leo Moser (mole99) - What about the rules @ https://gf180mcu-pdk.readthedocs.io/en/latest/physical_verification/design_manual/drm_09_4_3.html and https://gf180mcu-pdk.readthedocs.io/en/latest/physical_verification/design_manual/drm_09_4_5.html ?", "author": { "id": "169786952432746498", "name": "mithro_", "discriminator": "0000", "nickname": "Tim 'mithro' Ansell", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/9679bb77da48d47c905b398d98a83780-75B68.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": "2026-03_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png" } ], "inlineEmojis": [] }, { "id": "1486980170215850035", "type": "Reply", "timestamp": "2026-03-27T06:48:19.335+00:00", "timestampEdited": "2026-03-27T06:50:14.259+00:00", "callEndedTimestamp": null, "isPinned": false, "content": "Oh i thought 4 microns was allowed (some rule or guideline about \"gold\")", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.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": "2026-03_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png" } ], "reference": { "messageId": "1486713628412481717", "channelId": "1486057912555012167", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1486980276021100554", "type": "Default", "timestamp": "2026-03-27T06:48:44.561+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "But that still is larger than ideal for \"a via\" to an additional layer", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1486980345785225368", "type": "Default", "timestamp": "2026-03-27T06:49:01.194+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Ideally we'd know exactly the fab minimum CD limit", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1486982050664677547", "type": "Reply", "timestamp": "2026-03-27T06:55:47.669+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "It looks like there's 4 different bonding processes...", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "169786952432746498", "name": "mithro_", "discriminator": "0000", "nickname": "Tim 'mithro' Ansell", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/9679bb77da48d47c905b398d98a83780-75B68.png" } ], "reference": { "messageId": "1486980111726018680", "channelId": "1486057912555012167", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1486982170747736236", "type": "Default", "timestamp": "2026-03-27T06:56:16.299+00:00", "timestampEdited": "2026-03-27T06:56:25.99+00:00", "callEndedTimestamp": null, "isPinned": false, "content": "Which one is offered for \"bare wafer\" purchase option needs clarification though", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1487680502692319412", "type": "Reply", "timestamp": "2026-03-29T05:11:11.609+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "None of these bonding processes are really on offer, we are using an external wire bonding house.", "author": { "id": "169786952432746498", "name": "mithro_", "discriminator": "0000", "nickname": "Tim 'mithro' Ansell", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/9679bb77da48d47c905b398d98a83780-75B68.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" } ], "reference": { "messageId": "1486982170747736236", "channelId": "1486057912555012167", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1487730443016081449", "type": "Reply", "timestamp": "2026-03-29T08:29:38.31+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Unfortunately, they don't apply to our use case and specify different numbers. While the solder bump (solder ball) rules specify a min. passivation opening of 40um, the probe guidelines specify min. probe passivation opening of 50um.\n\nThere's an interesting note in the bond pad guidelines:\n\n> These are just default numbers for DRC purpose only, however, these are VARIABLE and the customer is advised to use the appropriate value acceptable to their assembly house.\n\nSo I suppose there's no min. limit for the passivation opening specified, because they assume that you are going to use sane numbers anyway, in order to do the bonding process.", "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": "2026-03_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "169786952432746498", "name": "mithro_", "discriminator": "0000", "nickname": "Tim 'mithro' Ansell", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/9679bb77da48d47c905b398d98a83780-75B68.png" } ], "reference": { "messageId": "1486980111726018680", "channelId": "1486057912555012167", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1487731209059565679", "type": "Default", "timestamp": "2026-03-29T08:32:40.949+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Do you see a maximum size for the passivation opening?", "author": { "id": "169786952432746498", "name": "mithro_", "discriminator": "0000", "nickname": "Tim 'mithro' Ansell", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/9679bb77da48d47c905b398d98a83780-75B68.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1487736715090198609", "type": "Default", "timestamp": "2026-03-29T08:54:33.689+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "No, I haven't seen one.", "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": "2026-03_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1487848899132526753", "type": "Reply", "timestamp": "2026-03-29T16:20:20.449+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Minimum is likely more important for the litho operating point for that layer", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "169786952432746498", "name": "mithro_", "discriminator": "0000", "nickname": "Tim 'mithro' Ansell", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/9679bb77da48d47c905b398d98a83780-75B68.png" } ], "reference": { "messageId": "1487731209059565679", "channelId": "1486057912555012167", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1487949821544497212", "type": "Reply", "timestamp": "2026-03-29T23:01:22.227+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Well, if there is no maximum, then you could just have a completely open top of the chip with no passivation.", "author": { "id": "169786952432746498", "name": "mithro_", "discriminator": "0000", "nickname": "Tim 'mithro' Ansell", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/9679bb77da48d47c905b398d98a83780-75B68.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" } ], "reference": { "messageId": "1487848899132526753", "channelId": "1486057912555012167", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1487951655407194266", "type": "Reply", "timestamp": "2026-03-29T23:08:39.454+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Wouldn't \"Min Probe pad top layer metal overlap of pad opening\" flag?", "author": { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "169786952432746498", "name": "mithro_", "discriminator": "0000", "nickname": "Tim 'mithro' Ansell", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/9679bb77da48d47c905b398d98a83780-75B68.png" } ], "reference": { "messageId": "1487949821544497212", "channelId": "1486057912555012167", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1487952149454520491", "type": "Reply", "timestamp": "2026-03-29T23:10:37.244+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Dunno, that is why I was asking.", "author": { "id": "169786952432746498", "name": "mithro_", "discriminator": "0000", "nickname": "Tim 'mithro' Ansell", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/9679bb77da48d47c905b398d98a83780-75B68.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "376976238528692225", "name": "nmz787", "discriminator": "0000", "nickname": "nmz787", "color": null, "isBot": false, "roles": [], "avatarUrl": "2026-03_media/3-FB033.png" } ], "reference": { "messageId": "1487951655407194266", "channelId": "1486057912555012167", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1488092010068840468", "type": "Default", "timestamp": "2026-03-30T08:26:22.613+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Even if there's no rule against it, I'm not sure if that doesn't lead to planarity issues at any of the processing steps.", "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": "2026-03_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] } ], "messageCount": 25 }