The Electronic & Biotech. profit center at SCHOTT AG manufactures thin glasses for the electronic industry that don't contain any toxic heavy metal additives like the refining agents arsenic and antimony.
The thin glass type AF 32™ eco is an aluminoborosilicate glass which is produced by the down-draw technology without using the refining agents arsenic and antimony, enabling production in a very thin thickness range between 0.1 and 1.1 mm. It is alkali-free in synthesis (however, contents of alkali oxide up to 0.2 weight percentages are possible by contamination of the raw materials and refractory material).
This glass type is suitable for applications where the following properties are mandatory:
Production without the refining agents arsenic and antimony
Alkali-free in synthesis
Coefficient of thermal expansion match to silicon
High temperature resistance
High transmission
Smooth fire-polished surface
AF 32™ eco is available in many different thicknesses in customized cut shapes such squares or round wafers.