Patent attributes
An object is to solve a strength problem around a suction hole on the gap side due to internal stress caused by a suction hole sealing metal material and depressurization, and provide a glass panel having enhanced safety. One glass plate 1A of a pair of glass plates 1A, 1B has a suction hole 4 penetrating the glass plate 1A in the front-back direction thereof, air in a gap V is sucked so as to depressurize the gap V, and the suction hole 4 is sealed by a suction hole sealing metal material 15. The suction hole sealing metal material 15 is solidified on the suction hole 4 so as to keep an airtight state, and is formed concentrically with the suction hole 4 in plan view, and the following Expression (1) is satisfied:Dw<=(Fc−0.0361Pd2/Tg2.2)/{(−0.0157Tg+0.1945)*Dg} (1)where Fc is long-term permissible stress at a glass edge, Tg is a glass plate thickness (mm), Dw is a protruding portion diameter (mm) of the suction hole sealing metal material, Dg is a protruding portion thickness (mm) of the suction hole sealing metal material, and Pd is a spacer pitch (mm).
