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title: "Thread: Are there SPICE models for pwell resistors?"
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# Thread: Are there SPICE models for pwell resistors?

Category: **ℹ️ - Information**
Parent channel: **#⁉️-questions**
Thread ID: `1513073805289848942`

Messages: **3**

## message-1513073805289848942

**2026-06-07T06:55:06.733+00:00 — were491 (@were491.)**

- Message ID: `1513073805289848942`
- Author ID: `325334453213986816`
- Nickname: were491
- User name: were491.
- Type: `Default`
- Edited: 2026-06-07T08:17:35.805+00:00
- Discord message: https://discord.com/channels/1361349522684510449/1513073805289848942/1513073805289848942
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/%E2%81%89%EF%B8%8F-questions/are-there-spice-models-for-pwell-resistors/2026-06/2026-06.json
- Archive source: https://discord.wafer.space/wafer-space/Information/questions/are-there-spice-models-for-pwell-resistors/2026-06/2026-06.json

**Content**

```text
Just saw that [this page](https://mithro-gf180mcu-pdk.readthedocs.io/en/latest/physical_verification/design_manual/drm_15.html) of the PDK mentions a p-well resistor alongside the n-well resistor. I couldn't find the schematic symbol or model by grepping inside the tech, so I'm curious if there actually is one.

-- Not actually planning on using them, I'm just curious.
```

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## message-1513436381781950605

**2026-06-08T06:55:51.705+00:00 — Leo Moser (mole99) (@mole99)**

- Message ID: `1513436381781950605`
- Author ID: `323371864074485771`
- Nickname: Leo Moser (mole99)
- User name: mole99
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1513073805289848942/1513436381781950605
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/%E2%81%89%EF%B8%8F-questions/are-there-spice-models-for-pwell-resistors/2026-06/2026-06.json
- Archive source: https://discord.wafer.space/wafer-space/Information/questions/are-there-spice-models-for-pwell-resistors/2026-06/2026-06.json

**Content**

```text
Unfortunately, I don't think it is part of the PDK.

The resistors page does not list it: https://gf180mcu-pdk.readthedocs.io/en/latest/analog/model_parameters/LV/LV_1_4_4.html

Looking at the spice models in the PDK (`sm141064.spice`), I can see that they only include the ones shown on the resistors page.

Magic, however, does extract resistance for pwell/isosub during pex.
```

**Reactions**

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---

## message-1513519174670876692

**2026-06-08T12:24:51.068+00:00 — were491 (@were491.)**

- Message ID: `1513519174670876692`
- Author ID: `325334453213986816`
- Nickname: were491
- User name: were491.
- Type: `Default`
- Edited: 2026-06-08T12:25:04.19+00:00
- Discord message: https://discord.com/channels/1361349522684510449/1513073805289848942/1513519174670876692
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/%E2%81%89%EF%B8%8F-questions/are-there-spice-models-for-pwell-resistors/2026-06/2026-06.json
- Archive source: https://discord.wafer.space/wafer-space/Information/questions/are-there-spice-models-for-pwell-resistors/2026-06/2026-06.json

**Content**

```text
thanks :)
```

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