Isolierverglasungselement

The two toughened glass window sheets are sealed (6) at the periphery of the smaller sheet (2), and separated by 0.2 mm thick spacers at 30 mm centres. The sheets are equally wide, but one (3), is slightly longer and carries the terminal connections (9) of collector conducting strips (8) of metallic silver in frit, serigraphically deposited along both long sides. A thin conducting layer (7) is deposited by e.g. pyrolysis between the collectors, before assembling, with the spacers, and heat treatment, which seals the components. The interior space is then evacuated. Optionally, extra width on one sheet provides external locations for both collector strips. A further variant uses identically sized sheets, the internally located strips being connected through one sheet.*double-glazed panel with evacuated interior space