ITO Coating Borofloat 33: Borofloat 33 (CTE 3.25 x 10^-6 /K, 350 nm – 2.0 um); 5 – 500 ohm/sq, >85% visible transmission. Single-piece prototypes to production volumes, quoted from your drawing.
Specify ito coating borofloat 33 when the bare substrate falls short: indium tin oxide transparent conductor, processed by magnetron sputtering, laser patterning option, brings Borofloat 33 to 5 – 500 ohm/sq, >85% visible transmission.
The numbers
| Material | Borofloat 33 (SCHOTT float production, wafer grade) |
|---|---|
| Thermal expansion (CTE) | 3.25 x 10^-6 /K |
| Service temperature | 450 C continuous |
| Transmission range | 350 nm – 2.0 um |
| Density | 2.23 g/cm3 |
| Knoop hardness | 480 kg/mm2 |
| Refractive index | 1.471 @ 587 nm |
| Stock thickness | 0.70 – 25.4 mm |
| Maximum blank size | 500 x 500 mm |
| Treatment | ITO Coating – indium tin oxide transparent conductor |
| Specification | 5 – 500 ohm/sq, >85% visible transmission |
| Deposition / method | magnetron sputtering, laser patterning option |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Specification advice
Three items decide most of the cost and lead time on this work:
- Material note: float tin side must be tracked when parts see coating or bonding steps.
- Sequence matters: all machining happens before ito coating; post-coating rework is not economical.
- 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.
What the process holds
Beyond this page, Borofloat 33 routinely runs through dicing, edge grinding, polishing, cnc machining in our shop – most real parts combine two or three of these steps.
Where these parts end up
The recurring buyers of ito coating borofloat 33: microfluidic devices (chips, manifolds, via plates, bonded stacks); machine vision (camera windows, ring-light diffusers, calibration plates); led packaging (groove covers, phosphor carriers, package windows). Background reading on the underlying material science: SCHOTT BOROFLOAT product page.
The fastest route to a quote is geometry: use the 3D builder below, draw a dimensioned 2D drawing from it, or open the site-wide custom glass machining 3D + 2D builder for fully custom parts.
Engineers scoping this work usually also review wafer dicing process, Borofloat 33 selection guide, alkali-free glass wafers.
Common questions
Is there a minimum order for ito coating borofloat 33?
No. Single prototypes are accepted, and pricing steps down at 10, 100 and 1,000 pieces.
How fast can prototypes ship?
Machined prototypes ship in 5 – 10 working days. Coated or bonded parts add 1 – 2 weeks depending on queue slots.
What files do you need for a quote?
A dimensioned PDF plus DXF or STEP geometry. If only a sketch exists, our drawing review service formalizes it before quoting.
Do parts ship with inspection data?
Dimensional reports, surface certificates and material certs per melt are available; specify the level on the RFQ.
Specifications on this page were last reviewed by our engineering team in September 2026.