Custom Square Glass Windows – 5 x 5 mm to 300 x 300 mm, thickness 0.3 – 25 mm. No minimum order; DFM review included with every RFQ.
A drawing for custom square glass windows is mostly a conversation about edges and datums. We produce them in fused silica, Borofloat 33, quartz and soda-lime at 5 x 5 mm to 300 x 300 mm, thickness 0.3 – 25 mm, with side +/-0.03 mm as the controlling tolerance, and finish the perimeter per spec.
Specification envelope
| Geometry | Square Glass Windows |
|---|---|
| Size envelope | 5 x 5 mm to 300 x 300 mm, thickness 0.3 – 25 mm |
| Key tolerance | side +/-0.03 mm |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Manufacturing capability
Production route: cnc machining, polishing, edge grinding – selected per geometry and volume. Edge condition: chamfered 0.1 – 0.5 mm as standard.
Design guidance
Before sending the RFQ, check these against your drawing:
- Hold the controlling dimension (side +/-0.03 mm) and let secondary dimensions carry standard tolerance – it is the single biggest cost lever.
- 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.
Where these parts end up
The recurring buyers of custom square glass windows: semiconductor equipment (view ports, wafer carriers, plasma rings, chamber windows); scientific instruments (reference flats, cells, prism mounts, stage inserts); industrial displays (touch covers, gauge windows, printed bezels).
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.
Related reading on this site: beam splitter glass, 4 inch Borofloat wafers, ITO coated glass.
Common questions
Do parts ship with inspection data?
Dimensional reports, surface certificates and material certs per melt are available; specify the level on the RFQ.
What sizes are available for square glass windows?
5 x 5 mm to 300 x 300 mm, thickness 0.3 – 25 mm, held to side +/-0.03 mm.
Is there a minimum order for custom square glass windows?
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.
Specifications on this page were last reviewed by our engineering team in September 2026.