---
page_id: curated-process-options
type: context-page
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template_id: curated-knowledge
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title: Process options and open questions
slug: curated-process-options
route: /process-and-pdk/options-and-open-questions
section: reference
access: public
summary: Unresolved metal, MIM, and resistor-option evidence and conflicts.
status: published
asset_base: .
home_href: /
md_url: /process-and-pdk/options-and-open-questions.md
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tags: [wafer-space, knowledge-base, curated]
last_updated: 2026-08-19
talk_url: /process-and-pdk/options-and-open-questions.talk.md
talk_route: /process-and-pdk/options-and-open-questions/talk
---

# Process options and open questions

This page keeps unresolved fabrication-option statements separate from confirmed process and PDK facts.

## Current summary

Confirmed process and PDK names are maintained on [Process and PDK](/process-and-pdk). This page only tracks option values that remain unresolved in the archive.

## Open questions and conflicts

- **Open question — MIM and resistor:** A Magic technology-file report assumed 1 kOhm/square high-res poly and 2 fF/um2 MIM. Leo Moser said the 2 fF value did not match the stack documentation he expected. ([archive message](/evidence/i-information/questions/threads/what-mimcaps-can-we-use-on-gf180mcu#message-1511616321790541896); [Discord](https://discord.com/channels/1361349522684510449/1511221611238522991/1511616321790541896))
- **Confirmed interpretation of the conflict:** Tim Edwards explained that MIM capacitance and high-resistor values are process-form options. No layout marker identifies which option was selected. ([archive message](/evidence/i-information/questions/threads/what-mimcaps-can-we-use-on-gf180mcu#message-1511726414225739927); [Discord](https://discord.com/channels/1361349522684510449/1511221611238522991/1511726414225739927))
- **Open question — top metal:** On 2026-07-06, Tim Ansell said wafer.space was unsure whether Run 1 had received 11 kA or 9 kA top metal. ([archive message](/evidence/i-information/general#message-1523498909111025705); [Discord](https://discord.com/channels/1361349522684510449/1361349523724570941/1523498909111025705))
- **Community claim, not controlled fact:** On 2026-08-06, tnt stated that Run 3 used 11 kA top metal, MIM Option B, 2 fF/um2, and 1 kOhm/square. tnt then said the answer came from prior Discord discussion, not the wafer.space site. ([archive message](/evidence/i-information/questions/threads/metal-and-module-selection-for-run3#message-1535003172249014412); [Discord](https://discord.com/channels/1361349522684510449/1534999803979632691/1535003172249014412)) ([archive message](/evidence/i-information/questions/threads/metal-and-module-selection-for-run3#message-1535007129876959442); [Discord](https://discord.com/channels/1361349522684510449/1534999803979632691/1535007129876959442))

## Curation decision

Do not publish a confirmed metal thickness, MIM density, or high-resistor value from these messages alone. A run-specific process form or another controlled wafer.space or GF source is required. Until then, tool defaults and community summaries are evidence of assumptions, not fabrication control. ([archive message](/evidence/i-information/questions/threads/what-mimcaps-can-we-use-on-gf180mcu#message-1511616321790541896); [Discord](https://discord.com/channels/1361349522684510449/1511221611238522991/1511616321790541896)) ([archive message](/evidence/i-information/questions/threads/what-mimcaps-can-we-use-on-gf180mcu#message-1511726414225739927); [Discord](https://discord.com/channels/1361349522684510449/1511221611238522991/1511726414225739927)) ([archive message](/evidence/i-information/general#message-1523498909111025705); [Discord](https://discord.com/channels/1361349522684510449/1361349523724570941/1523498909111025705))

## Related pages

- [Process and PDK](/process-and-pdk)
- [Run 3](/runs/run-3)
- [Submission procedures](/submission-procedures)
- [Analog Design](/analog-design)
- [Decisions and timelines](/decisions-and-timelines)

## Sources

- `1511616321790541896` — 2026-06-03T06:23:35.588+00:00 — Leo Moser — [archive](/evidence/i-information/questions/threads/what-mimcaps-can-we-use-on-gf180mcu#message-1511616321790541896) — [Discord](https://discord.com/channels/1361349522684510449/1511221611238522991/1511616321790541896) — Magic assumptions and documentation conflict.
- `1511726414225739927` — 2026-06-03T13:41:03.670+00:00 — Tim Edwards — [archive](/evidence/i-information/questions/threads/what-mimcaps-can-we-use-on-gf180mcu#message-1511726414225739927) — [Discord](https://discord.com/channels/1361349522684510449/1511221611238522991/1511726414225739927) — Process-form options are not shown by layout markers.
- `1523498909111025705` — 2026-07-06T01:20:45.173+00:00 — Tim 'mithro' Ansell — [archive](/evidence/i-information/general#message-1523498909111025705) — [Discord](https://discord.com/channels/1361349522684510449/1361349523724570941/1523498909111025705) — Run 1 top-metal uncertainty.
- `1535003172249014412` — 2026-08-06T19:14:35.244+00:00 — tnt — [archive](/evidence/i-information/questions/threads/metal-and-module-selection-for-run3#message-1535003172249014412) — [Discord](https://discord.com/channels/1361349522684510449/1534999803979632691/1535003172249014412) — Community Run 3 option claim.
- `1535007129876959442` — 2026-08-06T19:30:18.816+00:00 — tnt — [archive](/evidence/i-information/questions/threads/metal-and-module-selection-for-run3#message-1535007129876959442) — [Discord](https://discord.com/channels/1361349522684510449/1534999803979632691/1535007129876959442) — Claim provenance was prior Discord discussion.