# chamber_20ul_500um — reference-chip bundle (chamber-chip family)

A monolithic resin-SLA block: one 20 µL / 500 µm stadium reaction chamber, two straight
0.5 mm feed channels, and two vertical top access bores.

## Credits
- Design: Ali Tahmasbizadeh, Gale Lab, University of Utah.
- Target: chamber volume 20 µL, depth 500 µm, two ports. Footprint 27.86 × 7.0 × 2.3 mm.
- The ports are straight bores.

## Verification (trimesh, merged vertices)
| metric | value |
|---|---|
| chamber volume (mesh) | 19.9955 µL (−0.022 % vs 20 µL analytic) |
| chamber depth | 500 µm |
| chip watertight / Euler | True / 0 (genus-1: one cavity, 2 vents) |
| footprint | 27.86 × 7.00 × 2.30 mm |
| px_min (500 µm feature) | 26.32 px X / 20.83 px Y |

## Print note
Tilt ~30–45° about the short axis, one port draining / one venting; flush IPA port-to-port
BEFORE any UV post-cure. The ports are straight bores.

## STATUS
**DESIGN-VERIFIED** — watertight + volumetrically checked in CAD.