Straight-channel chip, 350 × 2775 µm, 20 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 × 2775 µm, 20 mm long: grey solid, white channel and bores

Exterior isometric render of Straight-channel chip, 350 × 2775 µm, 20 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 (Phrozen Sonic Mighty 12K, 19 × 24 µm non-square) with one straight rectangular channel 350 µm deep × 2775 µm wide, running the full 20 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 24.5 × 5.775 × 2.15 mm.

Verification

metric	value
Channel cross-section (H × W) — target	350 × 2775 µm
Channel length	20 mm
Footprint (L × W × H)	24.5 × 5.775 × 2.15 mm
Channel volume — analytic (nominal)	19.425 µL
Channel volume — measured on the model's mesh	19.814 µL
Δ (mesh − analytic)	+2.00% — 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

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

Print adaptation

Channel (target → drawn): 0.35 × 2.77 mm (H × W) — 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_350x2775um_20mm.scad9.8 KBDownload
STLchannel_350x2775um_20mm.stl209.9 KBDownload
STLvoid_channel_350x2775um_20mm.stl207.5 KBDownloadFor inspection, not for printing: the fluid network, every space that holds liquid, as a solid.
PNGchannel_350x2775um_20mm_xray.png145.3 KBDownload
PNGchannel_350x2775um_20mm_section.png18.3 KBDownload
MDREADME.md2.2 KBDownload