# channel_200x1000um_18mm — reference-chip bundle (channel-chip family)

One straight rectangular channel, 200 µm deep × 1000 µm wide, 18.0 mm
port-to-port, in a monolithic resin-SLA block with two Ø1.5 mm vertical access bores.

## Credits

- Design: Ali Tahmasbizadeh, Gale Lab, University of Utah.
- Target: channel cross-section H × W = 200 × 1000 µm, length 18.0 mm. Chip footprint 22.5 × 4.5 × 2.0 mm.
- The ports are straight bores.

## Verification (trimesh, merged vertices)

| metric | value |
|---|---|
| channel volume — analytic | 3.6000 µL |
| channel volume — mesh | 3.6800 µL |
| Δ (mesh − analytic) | +2.22% (uniform 0.4 mm boolean overrun) |
| void watertight / bodies | True / 1 |
| chip watertight / Euler | True / 0 |
| px_min @ 19 µm/px (Phrozen 12K, X) | 10.53 px |
| px_min @ 24 µm/px (Phrozen 12K, Y) | 8.33 px |
| px_min @ 7.6 µm/px (BYU Nordin) | 26.32 px |
| tier | good |

**Phrozen Sonic Mighty 12K design** — geometry verified in CAD.

## Rebuild

    /usr/local/bin/python3 build_batch2.py     # OpenSCAD 2021.01 + trimesh 4.12.2