open-source-silicon.dev

<https://github.com/IHP-GmbH/IHP-Open-PDK/issues/304|#304 Undocumented layers in QA layouts for DRC>
Issue created by <https://github.com/RTimothyEdwards|RTimothyEdwards>
In the GDS file `sg13g2_qacells.gds`, cell `nBuLay`, there are two layer:purpose pair layers:

```
236 0
236 1

```

These layers are coincident with the nwell layers, the first (purpose 0) is a drawing layer and the second (purpose 1) is a text layer with the text `[@instanceName]`.

These layers are not in the list of layers in the DRC document, nor are they layers defined in the klayout technology files. I think I had previously accounted for all layers in all GDS files in this repository, so I believe that it is a recent addition.

What are these layers?
<https://github.com/IHP-GmbH/IHP-Open-PDK|IHP-GmbH/IHP-Open-PDK>

<https://github.com/IHP-GmbH/IHP-Open-PDK/issues/304|#304 Undocumented layers in QA layouts for DRC>
Issue closed as completed by <https://github.com/RTimothyEdwards|RTimothyEdwards>
<https://github.com/IHP-GmbH/IHP-Open-PDK|IHP-GmbH/IHP-Open-PDK>