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    "name": "thyristor port from SG13G2",
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      "timestamp": "2026-09-17T01:18:59.725+00:00",
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      "content": "IHPs SG13G2 magic Pcells include this structure which doesn't actually come with any parameters to adjust and doesn't appear to have any notable further documentation I could realistically find; it supposedly has some care to it for LVS&DRC to go through in some sort of acceptable manner... but that's it.\n\nAs far as I understand it's a symmetric floating latching structure, some kind of DIAC I suppose; it's for ESD protection I think.\nThe bottom is symmetric.\nOne side is metal via'd up to one higher metal terminal; same for the other.\n\nIt's all encased in DNWELL (they call it nBuLay as it's also relevant for the SiGe HBT's the G2 process offers). It's also all thick oxide.\nI disabled visibility of those layers for I hope obvious reasons.",
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      "content": "I _think_ we should have all the doping layers needed on gf180mcuD to copy this structure for a coming e-test die; I'd hope we might have someone who knows somewhat more about the subject matter though or how to perhaps tcad the thankfully \"just\" 2D cross-section slice.\nLuckily this could be modeled as just 3 electrodes (substrate plus the two obvious metal zones shorting the two contact areas and the corresponding gate poly together) of differing potential; not sure if Xyce's TCAD functionality allows the electrodes to be so split though... and of non-same material.",
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      "timestamp": "2026-09-23T00:54:47.772+00:00",
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      "content": "@namibj - I believe KLayout can generate cross section diagrams...\n\nhttps://github.com/klayoutmatthias/sky130_xsection\n\nhttps://github.com/gdsfactory/klayout_pyxs",
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      "content": "I'll try not sure though if it'll represent the doping patterns, I recal it not ding that when I think I already tried this.",
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      "timestamp": "2026-09-23T23:40:49.269+00:00",
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      "content": "Afraid the is beyond the limits of my knowledge.",
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