Nippon Sheet Glass Company, Limited

Kazuya Fujino

Tetsuo Minaai

Tatsuhiro Nakazawa

Masafumi Taguchi

Daisuke Inaoka

Provided is a glass panel capable of, even after elapse of a long period, reliably sealing a suction hole and keeping a gap in an airtight state. A suction hole sealing metal materialhas a first protruding portionformed on an atmospheric side around a suction hole, and a second protruding portionformed on a gap side around the suction hole, and as seen in a thickness direction of the glass platesA,B, a first contourwhich is an outermost edge of a first adhesion surface portion Swhere the first protruding portionis in contact with an atmospheric-side surfaceA of the glass plateA, and a second contourwhich is an outermost edge of a second adhesion surface portion Swhere the second protruding portionis in contact with a gap-side surfaceB of the glass plateA, are on an outer side of a third contourwhich is a gap-side hole edge of the suction hole

Glass panel

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 plateA of a pair of glass platesA,B has a suction holepenetrating the glass plateA in the front-back direction thereof, air in a gap V is sucked so as to depressurize the gap V, and the suction holeis sealed by a suction hole sealing metal material. The suction hole sealing metal materialis solidified on the suction holeso as to keep an airtight state, and is formed concentrically with the suction holein plan view, and the following Expression (1) is satisfied:&#x3c;=(&#x2212;0.0361)/{(&#x2212;0.0157+0.1945)*&#x2003;&#x2003;(1)

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Tokyo, Japan

Kazuya Fujino