Alkali-free with a low CTE
One of the eco-friendly characteristics of AF 32® eco is its alkali-free composition, making it highly suitable for semiconductor systems. With a similar CTE to a silicon wafer, it can be used as a high-quality wafer-thin glass cover or substrate for silicon chips in semiconductors and MEMS devices.
Wide thickness range, tight geometrical tolerance
AF 32® eco is available in a wide variety of thicknesses, from an extremely thin 30 µm up to 0.5 mm. Whatever thickness you require, the total thickness variation (TTV) factor remains tightly controlled, at just ≤ 5 µm to 15 µm.
Outstanding transmission levels
Light transmission achieved by AF 32® eco glass is consistently strong both in the visible range and at higher wavelengths up to near-infrared. It achieves an exceptional luminous transmittance level of 91.9 %, but after AR coating, transmission can reach 97-99 %.
Excellent dielectric properties
The low dielectric loss of AF 32® eco allows applications at very high frequencies. The thermal expansion (CTE) is matched to silicon and allows co-processing with silicon wafers. This allows for example to realize SAW and BAW filter in the GHz range with low insertion loss.