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For the wirebonder we use a clean room from Elegra Dieter Bosch (liquidated in 2017). It uses an HEPA filter from AAF, to be specific the AstroCal 2 Dry Seal, which features the following specifics:
| Efficency | ≥99.999% |
| Size | 782x1830x69 mm |
| Rated Airflow | 0.45 m/s |
| Initial Resistance | ≤125 |
| Type | AstroCal 2 ULPA |
| Serial Nr. | 500246 |
| Datasheet | Astrocal 2 Dry Seal; Clean Room |