Vacuum Insulation Glass: Assembly
Vacuum insulation glass (VIG) comprises a double glazing with the gas pressure
between the panes evacuated to values below 10 - 3 mbar. A gas-tight
edge seal maintains the vacuum. Small supports are fixed at regular intervals
between the panes to avoid the panes being pressed together or collapsing due
to the surrounding pressure. The supports can only be seen close up and do not
impair the visibility through the panes (cf. Advantages
An IR-reflecting coating (low-ε coating) minimizes the radiative exchange
between the two panes.
Typical vacuum insulation glass (VIG) assembly. The width of the gap is
usually 0.2 - 1 mm. Functional layers (e.g. solar protection,
insulation) can be applied as usual.