20 µL chamber chip, 500 µm deep

Internal geometry — X-ray

X-ray see-through view of 20 µL chamber chip, 500 µm deep: plan fluid footprint (true scale) and z-exaggerated isometric of the internal void

See-through internal view. Left: fluid footprint in plan, true scale (teal); ports show as the wider circles. Right: isometric of the internal void, vertical z exaggerated 3× for visibility. The exterior is an opaque solid block — this is what is inside it.

Download: PNG (x-ray)

Longitudinal section & exterior

Longitudinal y=0 section of 20 µL chamber chip, 500 µm deep: grey solid, white voids

Exterior isometric render of 20 µL chamber chip, 500 µm deep (the outside of the CAD model, drawn opaque)

Longitudinal section at y=0 (left): grey = solid, white = fluid voids. Exterior isometric (right): the outside of the CAD model, drawn opaque. Click either for full resolution.

Download: PNG (section) · PNG (top) · PNG (iso)

Description

A single monolithic resin-SLA block (Phrozen Sonic Mighty 12K, 19 × 24 µm non-square) with one 20 µL, 500 µm-deep stadium reaction chamber, two straight 0.5 mm feed channels on the same floor, and two Ø1.5 mm vertical access bores to the top surface. Footprint 27.86 × 7.0 × 2.3 mm.

The target is a 20 µL chamber, 500 µm deep, with two ports. The model reproduces it exactly. The chamber is 4 mm wide; its stadium length is solved from area = volume ÷ depth, which is why the chip is 27.86 mm long.

Verification

metric	value
Chamber volume — mesh	19.9955 µL (−0.022% vs 20 µL target)
Chamber depth — target	500 µm
Footprint (L × W × H)	27.86 × 7.00 × 2.30 mm
Chip watertight	True
Chip Euler number	0 — genus-1: one cavity, two vents
Void connected bodies	1
Min feature vs Phrozen 12K X (px_min = 500/19)	26.32 px
Min feature vs Phrozen 12K Y (px_min = 500/24)	20.83 px

All geometry checks run with trimesh (merged vertices) on the exported STLs. See the bundled README for the full method.

Print adaptation

Chamber (target → drawn): 0.50 mm deep — as targeted; no print enlargement applied
Chamber volume: 20 µL target / 19.9955 µL in the model (mesh)
Target printer: Phrozen Sonic Mighty 12K — 19 µm (X) × 24 µm (Y), non-square

Target dimensions are what the design aims at; drawn dimensions are what its CAD model is drawn at. Where the two are the same number, no feature was resized to print.

Credits

Design: Ali Tahmasbizadeh, Gale Lab, University of Utah.

Files to download

SCADchamber_20ul_500um.scad12.0 KBDownload
STLchamber_20ul_500um.stl208.1 KBDownload
STLvoid_chamber_20ul_500um.stl205.9 KBDownloadFor inspection, not for printing: the fluid network, every space that holds liquid, as a solid.
PNGchamber_20ul_500um_xray.png151.3 KBDownload
PNGchamber_20ul_500um_section.png19.6 KBDownload
MDREADME.md1.0 KBDownload