Dimmable window pane with reduced bow and insulated glazing unit comprising the same

A window pane comprising:

• a transmission control layer comprising a first glass sheet, a second glass sheet, and a liquid crystal material disposed between the first glass sheet and the second glass sheet, each of the first glass sheet and the second glass sheet is a fusion formed alkali-free aluminosilicate glass sheet having a thickness of 0.5 mm to 0.7 mm, a width of 400 mm to 600 mm, and a length of 600 mm to 900 mm, wherein the fusion formed alkali-free aluminosilicate glass sheet comprises 0.1 mol % or less R2O, expressed on an oxide basis, where R is one or more of Li, Na, and K;
• a first glass panel comprising a soda lime glass having a thickness of 3 mm to 5 mm bonded to the first glass sheet of the transmission control layer with a polyvinyl butyral adhesive;
• and
• a second glass panel comprising a soda lime glass having a thickness of 3 mm to 5 mm bonded to the second glass sheet of the transmission control layer with a polyvinyl butyral adhesive;
• wherein the transmission control layer is disposed between the first glass panel and the second glass panel;
• wherein the liquid crystal material is controllable to adjust a transmittance of the window pane;
• wherein the first glass sheet and the second glass sheet of the transmission control layer are arranged substantially parallel to and spaced from each other to define a cell therebetween, and the liquid crystal material is disposed within the cell;
• wherein the cell has a thickness of 10 μm or less;
• and
• wherein a bow of the window pane is 0.02 mm or less per 40 mm of length.