CNC Machining FTO Coated Glass: FTO Coated Glass (CTE substrate dependent, 80 – 82% visible @ 7 ohm/sq); CNC Machining to +/-0.01 mm positional. Single-piece prototypes to production volumes, quoted from your drawing.
Ask any process engineer what makes fto coated glass difficult and the answer is specific: the harder FTO film abrades diamond tooling faster and edges need post-cut inspection for film lift. Our cnc machining line is tooled around exactly that – 4-axis machining centers with diamond tooling and through-spindle coolant – holding +/-0.01 mm positional on parts from 0.5 – 50 mm thick.
Specification envelope
| Material | FTO Coated Glass (TEC-7, TEC-15 equivalents) |
|---|---|
| Thermal expansion (CTE) | substrate dependent |
| Service temperature | 600 C (coating stable) |
| Transmission range | 80 – 82% visible @ 7 ohm/sq |
| Density | 2.23 – 2.50 g/cm3 |
| Knoop hardness | harder film than ITO |
| Refractive index | ~2.0 (FTO film) |
| Stock thickness | 1.1 – 3.2 mm substrates |
| Maximum blank size | 360 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 |
Process window
CNC Machining earns its place through complex 3D geometry – pockets, steps, counterbores and compound edges in one setup. Its boundary condition – internal corners carry a minimum radius equal to the smallest practical tool, typically R0.5 mm – is the first thing our DFM review checks.
Beyond this page, FTO Coated Glass routinely runs through laser cutting, coring, etching, drilling in our shop – most real parts combine two or three of these steps.
DFM notes from the shop floor
Before sending the RFQ, check these against your drawing:
- Material note: the harder FTO film abrades diamond tooling faster and edges need post-cut inspection for film lift.
- 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.
The full rules live in our tolerance design guide and holes and edges design guide.
Application context
cnc machining fto coated glass shows up across mems devices (cap wafers, TGV substrates, motion-sensor lids); machine vision (camera windows, ring-light diffusers, calibration plates); laser systems (windows, beam splitters, debris shields). Background reading on the underlying material science: ScienceDirect: FTO glass.
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.
Engineers scoping this work usually also review custom FTO glass, FTO conductive glass, high-purity quartz guide.
Common questions
What tolerances are achievable on FTO Coated Glass parts?
Ground features hold +/-0.01 mm and lapped thickness reaches +/-0.003 mm. The harder FTO film abrades diamond tooling faster and edges need post-cut inspection for film lift.
What thickness range do you stock for FTO Coated Glass?
Standard stock spans 1.1 – 3.2 mm substrates, with blanks up to 360 x 300 mm. Other formats are sourced per order.
How does FTO Coated Glass behave under heat?
CTE is substrate dependent and continuous service reaches 600 C (coating stable), which is what drives its use where thermal stability beyond ITO 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.