Alkali-Free Glass Glass Wafers for Wafer-Level Packaging – Alkali-Free Glass (CTE 3.2 x 10^-6 /K, 350 nm – 2.0 um). No minimum order; DFM review included with every RFQ.
alkali-free glass glass wafers for wafer-level packaging programs need alkali-free thin lids with hermetic-bond edges. Alkali-Free Glass is the fit here because it offers no alkali ion migration into TFT or sensor layers. Typical parts: cover lids, frit-seal frames, fill-port plates.
Specifications at a glance
| Material | Alkali-Free Glass (AF32 / EAGLE-class display glass) |
|---|---|
| Thermal expansion (CTE) | 3.2 x 10^-6 /K |
| Service temperature | 600 C (Tg 717 C) |
| Transmission range | 350 nm – 2.0 um |
| Density | 2.43 g/cm3 |
| Knoop hardness | 590 kg/mm2 |
| Refractive index | 1.51 @ 587 nm |
| Stock thickness | 0.10 – 1.1 mm |
| Maximum blank size | 400 x 300 mm |
| Wafer formats | 2", 3", 4", 6", 8" and 12" with SEMI flats or notch |
| TTV | under 3 – 5 um by format |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Capabilities and limits
One material, many routes: on Alkali-Free Glass we also quote etching, double-side polishing, polishing, grinding, and multi-step drawings are the norm rather than the exception.
Design guidance
The shop-floor rules that matter here:
- Material note: thin sheets below 0.3 mm demand carrier-supported handling through every step.
- 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
The recurring buyers of alkali-free glass glass wafers for wafer-level packaging: industrial displays (touch covers, gauge windows, printed bezels); oled packaging (cover lids, frit-seal frames, fill-port plates); mems devices (cap wafers, TGV substrates, motion-sensor lids). Background reading on the underlying material science: SCHOTT AF 32 eco.
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.
For adjacent specifications, see alkali-free glass wafers, etched LED/OLED covers, ultra-thin quartz discs.
Common questions
Is there a minimum order for alkali-free glass glass wafers for wafer-level packaging?
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.
What tolerances are achievable on Alkali-Free Glass parts?
Ground features hold +/-0.01 mm and lapped thickness reaches +/-0.003 mm. Thin sheets below 0.3 mm demand carrier-supported handling through every step.
Specifications on this page were last reviewed by our engineering team in September 2026.