7059 barium-borosilicate glass is an almost alkali-free technical flat glass from Corning and features a good thermal shock resistance. It has long been the standard of the electronics industry for thin-film circuits, which require special electrical properties. 7059F glass is fusion drawn into sheets at final thickness, obtaining a flat smooth surface finish directly form the molten glass. 7059 is slot drawn and is not as smooth as the 7059F which is fusion drawn. Both 7059 glass materials have a low level of alkali which is less than 0,3%. This is important for many electronic applications, because alkali ions are known to lower the performance, reliability and longevity of thin-film devices. For further technical information, please use our information request form.
Note: The production of 7059 and 7059F has been discontinued a long time ago. We still stock some remaining 7059 material though. The direct follow-up glass materials are 1737 and 1737F from Corning.