Alkali-Free Glass for OLED 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.
What alkali-free glass for oled packaging actually buys from a glass shop: cover lids, frit-seal frames, fill-port plates. The requirement underneath is 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.
The numbers
| 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 |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
DFM notes from the shop floor
Three items decide most of the cost and lead time on this work:
- 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.
Process window
Beyond this page, Alkali-Free Glass routinely runs through cnc machining, dicing, polishing, edge grinding in our shop – most real parts combine two or three of these steps.
Typical applications
The recurring buyers of alkali-free glass for oled packaging: oled packaging (cover lids, frit-seal frames, fill-port plates); industrial displays (touch covers, gauge windows, printed bezels); ccd inspection equipment (CCD cover plates, reference grids, stage glass). 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 etched LED/OLED covers, alkali-free glass wafers, machining tolerance guide.
Frequently asked questions
How does Alkali-Free Glass behave under heat?
CTE is 3.2 x 10^-6 /K and continuous service reaches 600 C (Tg 717 C), which is what drives its use where no alkali ion migration into TFT or sensor layers matters.
What do oled packaging programs usually order?
Cover lids, frit-seal frames, fill-port plates. Typical spec: thickness to 0.1 mm, edge chips < 20 um.
Is there a minimum order for alkali-free glass for oled 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.
Specifications on this page were last reviewed by our engineering team in August 2026.