Straight-channel chip, 200 × 200 µm, 58.5 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, 200 × 200 µm, 58.5 mm long: grey solid, white channel and bores

Exterior isometric render of Straight-channel chip, 200 × 200 µm, 58.5 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 200 µm deep × 200 µm wide, running the full 58.5 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 63.0 × 4.5 × 2.0 mm.

The card thumbnail looks different — the geometry did not change. The chip footprint is now 63 mm long instead of 24.5 mm, and the card frames the whole footprint, so the same 200 × 200 µm channel renders as a thinner line at card scale. The cross-section is identical; only the frame around it grew.

Verification

metric	value
Channel cross-section (H × W) — target	200 × 200 µm
Channel length — target	58.5 mm
Footprint (L × W × H)	63.0 × 4.5 × 2.0 mm
Channel volume — analytic (nominal)	2.3400 µL
Channel volume — measured on the model's mesh	2.3560 µL
Δ (mesh − analytic)	+0.68% — 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 = 200/19)	10.53 px
Min feature vs Phrozen 12K Y (px_min = 200/24)	8.33 px
Min feature vs BYU Nordin (px_min = 200/7.6)	26.32 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): 0.20 × 0.20 mm (H × W) × 58.5 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_200x200um_58p5mm.scad9.8 KBDownload
STLchannel_200x200um_58p5mm.stl136.0 KBDownload
STLvoid_channel_200x200um_58p5mm.stl136.5 KBDownloadFor inspection, not for printing: the fluid network, every space that holds liquid, as a solid.
PNGchannel_200x200um_58p5mm_xray.png104.9 KBDownload
PNGchannel_200x200um_58p5mm_section.png21.0 KBDownload
MDREADME.md1.1 KBDownload