Polishing D263 Thin Glass: D263 Thin Glass (CTE 7.2 x 10^-6 /K, 350 nm – 2.0 um); Polishing to flatness to lambda/4 per 25 mm. Single-piece prototypes to production volumes, quoted from your drawing.
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 polishing line is tooled around exactly that – pitch and polyurethane pad polishers with cerium oxide slurry – holding flatness to lambda/4 per 25 mm on parts from 0.2 – 50 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 | Polishing |
| Working tolerance | flatness to lambda/4 per 25 mm |
| Minimum feature | Ra below 1 nm |
| Surface finish | scratch-dig 40/20 to 20/10 |
| Thickness window | 0.2 – 50 mm |
| Edge condition | polished bevels available |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Capabilities and limits
The core strength of Polishing is optical-grade faces with certified scratch-dig and interferometer-verified flatness. The honest limit: steep aspect parts and deep pockets polish unevenly; those faces are specified as fine-ground. Both belong on the drawing before quoting, not after.
One material, many routes: on D263 Thin Glass we also quote drilling, double-side polishing, edge grinding, laser cutting, and multi-step drawings are the norm rather than the exception.
Design guidance
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: steep aspect parts and deep pockets polish unevenly; those faces are specified as fine-ground.
- 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.
Who orders this
The recurring buyers of polishing d263 thin glass: oled packaging (cover lids, frit-seal frames, fill-port plates); microfluidic devices (chips, manifolds, via plates, bonded stacks); led packaging (groove covers, phosphor carriers, package windows). Background reading on the underlying material science: SCHOTT D 263 thin glass.
Dimensions still moving? Configure this part live in the 3D + 2D builder below, or open the full custom glass machining 3D + 2D builder to start from a blank canvas.
Useful companion pages: optical polishing capability, fused silica material guide, fused silica wafers 2-12 inch.
Common questions
What equipment runs the polishing work?
Pitch and polyurethane pad polishers with cerium oxide slurry.
Is there a minimum order for polishing d263 thin glass?
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.
Specifications on this page were last reviewed by our engineering team in September 2026.