CNC Machining ITO Coated Glass – ITO Coated Glass (CTE substrate dependent, >85% visible @ 100 ohm/sq); CNC Machining to +/-0.01 mm positional. No minimum order; DFM review included with every RFQ.
cnc machining ito coated glass is a materials problem before it is a machining problem. ITO Coated Glass has transparent conductivity and a Knoop hardness of substrate value, so the cnc machining recipe – feeds, coolant, tooling – differs from what works on ordinary float glass. The line runs 4-axis machining centers with diamond tooling and through-spindle coolant and holds +/-0.01 mm positional.
Key parameters
| Material | ITO Coated Glass (ITO on soda-lime, borosilicate or alkali-free) |
|---|---|
| Thermal expansion (CTE) | substrate dependent |
| Service temperature | 350 C (coating stable) |
| Transmission range | >85% visible @ 100 ohm/sq |
| Density | 2.23 – 2.51 g/cm3 |
| Knoop hardness | substrate value |
| Refractive index | 1.9 – 2.1 (ITO film) |
| Stock thickness | 0.30 – 3.0 mm substrates |
| Maximum blank size | 400 x 300 mm |
| Process | CNC Machining |
| Working tolerance | +/-0.01 mm positional |
| Minimum feature | 0.4 mm slot width |
| Surface finish | Ra 0.4 um ground, optional polish |
| Thickness window | 0.5 – 50 mm |
| Edge condition | chamfered 0.1 – 0.5 mm as standard |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Getting the drawing right
Before sending the RFQ, check these against your drawing:
- Material note: machining happens film-side-aware: scribing, edge deletion and contact zones are defined before cutting.
- Process boundary: internal corners carry a minimum radius equal to the smallest practical tool, typically R0.5 mm.
- Over-specification is the quiet budget killer: a 20/10 scratch-dig face costs roughly three times an 80/50 face, so grade each surface individually.
For the complete framework, see the tolerance design guide and the holes and edges design guide.
Capabilities and limits
The core strength of CNC Machining is complex 3D geometry – pockets, steps, counterbores and compound edges in one setup. The honest limit: internal corners carry a minimum radius equal to the smallest practical tool, typically R0.5 mm. Both belong on the drawing before quoting, not after.
One material, many routes: on ITO Coated Glass we also quote laser cutting, edge grinding, coring, drilling, and multi-step drawings are the norm rather than the exception.
Application context
The recurring buyers of cnc machining ito coated glass: medical diagnostics (flow cells, slides, microplate bottoms, cuvette windows); ccd inspection equipment (CCD cover plates, reference grids, stage glass); laboratory instruments (cuvettes, sight glasses, stir-cell windows). Background reading on the underlying material science: ScienceDirect: indium tin oxide.
The fastest route to a quote is geometry: use the 3D configurator below, or the site-wide custom glass machining 3D builder for fully custom parts.
Related reading on this site: ITO coated glass, custom ITO glass, tolerance design guide.
Frequently asked questions
What tolerances are achievable on ITO Coated Glass parts?
Ground features hold +/-0.01 mm and lapped thickness reaches +/-0.003 mm. Machining happens film-side-aware: scribing, edge deletion and contact zones are defined before cutting.
What thickness range do you stock for ITO Coated Glass?
Standard stock spans 0.30 – 3.0 mm substrates, with blanks up to 400 x 300 mm. Other formats are sourced per order.
How does ITO Coated Glass behave under heat?
CTE is substrate dependent and continuous service reaches 350 C (coating stable), which is what drives its use where transparent conductivity matters.
What accuracy does cnc machining hold?
+/-0.01 mm positional with minimum features of 0.4 mm slot width. Internal corners carry a minimum radius equal to the smallest practical tool, typically R0.5 mm.
What equipment runs the cnc machining work?
4-axis machining centers with diamond tooling and through-spindle coolant.
Specifications on this page were last reviewed by our engineering team in July 2026.