Straight-channel chip, 350 × 2100 µm, 18 mm long

Internal geometry — X-ray

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 Straight-channel chip, 350 × 2100 µm, 18 mm long: grey solid, white channel and bores

Exterior isometric render of Straight-channel chip, 350 × 2100 µm, 18 mm long (opaque block with two top bores)

Longitudinal section at y=0 (left): grey = solid, white = channel + bores. 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 block for resin SLA with one straight rectangular channel 350 µm deep × 2100 µm wide, running the full 18.0 mm port-to-port at mid-height, a solid floor below and ceiling above, and two Ø1.5 mm vertical access bores to the top surface. Footprint 22.5 × 5.1 × 2.15 mm.

Verification

metric	value
Channel cross-section (H × W) — target	350 × 2100 µm
Channel length — target	18.0 mm
Footprint (L × W × H)	22.5 × 5.1 × 2.15 mm
Channel volume — analytic (nominal)	13.2300 µL
Channel volume — measured on the model's mesh	13.5240 µL
Δ (mesh − analytic)	+2.22% — uniform 0.4 mm boolean overrun; cross-section exact
Void watertight	True
Void connected bodies	1 — bore→channel→bore continuous
Chip watertight	True
Chip Euler number	0 — genus-1: one cavity, two vents
Min feature vs Phrozen 12K X (px_min = 350/19)	18.42 px
Min feature vs Phrozen 12K Y (px_min = 350/24)	14.58 px
Min feature vs BYU Nordin (px_min = 350/7.6)	46.05 px

All geometry checks run with trimesh (merged vertices) on the exported STLs. See the bundled README for the full method. The minimum-feature rows are pixel counts; for each printer’s process limits, see Hardware and process.

Print adaptation

Channel (target → drawn): 0.35 × 2.10 mm (H × W) × 18.0 mm long — as targeted; no print enlargement applied
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

SCADchannel_350x2100um_18mm.scad9.8 KBDownload
STLchannel_350x2100um_18mm.stl209.1 KBDownload
STLvoid_channel_350x2100um_18mm.stl207.0 KBDownloadFor inspection, not for printing: the fluid network, every space that holds liquid, as a solid.
PNGchannel_350x2100um_18mm_xray.png144.4 KBDownload
PNGchannel_350x2100um_18mm_section.png19.4 KBDownload
MDREADME.md1.1 KBDownload