Double-Side Polishing D263 Thin Glass – D263 Thin Glass (CTE 7.2 x 10^-6 /K, 350 nm – 2.0 um); Double-Side Polishing to TTV under 3 um. No minimum order; DFM review included with every RFQ.
Ask any process engineer what makes d263 thin glass difficult and the answer is specific: ultra-thin stock cannot take conventional clamping; parts are machined on wax or UV-tape carriers. Our double-side polishing line is tooled around exactly that – planetary double-side polishers with carrier plates – holding TTV under 3 um on parts from 0.1 – 10 mm thick.
Specification envelope
| Material | D263 Thin Glass (SCHOTT D 263 T eco) |
|---|---|
| Thermal expansion (CTE) | 7.2 x 10^-6 /K |
| Service temperature | 400 C (Tg 557 C) |
| Transmission range | 350 nm – 2.0 um |
| Density | 2.51 g/cm3 |
| Knoop hardness | 590 kg/mm2 |
| Refractive index | 1.523 @ 587 nm |
| Stock thickness | 0.03 – 1.1 mm |
| Maximum blank size | 440 x 360 mm |
| Process | Double-Side Polishing |
| Working tolerance | TTV under 3 um |
| Minimum feature | Ra below 0.5 nm both faces |
| Surface finish | 60/40 to 20/10 both faces |
| Thickness window | 0.1 – 10 mm |
| Edge condition | edge-rounded before DSP |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Process window
Double-Side Polishing earns its place through wafer-grade parallelism and sub-nanometer roughness on both faces simultaneously. Its boundary condition – parts must be round or near-round; strongly asymmetric outlines wedge in the carriers – is the first thing our DFM review checks.
Beyond this page, D263 Thin Glass routinely runs through dicing, polishing, cnc machining, 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: ultra-thin stock cannot take conventional clamping; parts are machined on wax or UV-tape carriers.
- Process boundary: parts must be round or near-round; strongly asymmetric outlines wedge in the carriers.
- 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.
Typical applications
Orders for double-side polishing d263 thin glass cluster in medical diagnostics (flow cells, slides, microplate bottoms, cuvette windows); oled packaging (cover lids, frit-seal frames, fill-port plates); microfluidic devices (chips, manifolds, via plates, bonded stacks). Background reading on the underlying material science: SCHOTT D 263 thin 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 AR optical windows, custom ITO glass, alkali-free display glass.
Frequently asked questions
What tolerances are achievable on D263 Thin Glass parts?
Ground features hold +/-0.01 mm and lapped thickness reaches +/-0.003 mm. Ultra-thin stock cannot take conventional clamping; parts are machined on wax or UV-tape carriers.
What thickness range do you stock for D263 Thin Glass?
Standard stock spans 0.03 – 1.1 mm, with blanks up to 440 x 360 mm. Other formats are sourced per order.
How does D263 Thin Glass behave under heat?
CTE is 7.2 x 10^-6 /K and continuous service reaches 400 C (Tg 557 C), which is what drives its use where down-drawn fire-polished surfaces matters.
What accuracy does double-side polishing hold?
TTV under 3 um with minimum features of Ra below 0.5 nm both faces. Parts must be round or near-round; strongly asymmetric outlines wedge in the carriers.
What equipment runs the double-side polishing work?
Planetary double-side polishers with carrier plates.
Specifications on this page were last reviewed by our engineering team in July 2026.