Abstract: 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 material 15 has a first protruding portion 15a formed on an atmospheric side around a suction hole 4, and a second protruding portion 15b formed on a gap side around the suction hole 4, and as seen in a thickness direction of the glass plates 1A, 1B, a first contour 16a which is an outermost edge of a first adhesion surface portion S1 where the first protruding portion 15a is in contact with an atmospheric-side surface 17A of the glass plate 1A, and a second contour 16b which is an outermost edge of a second adhesion surface portion S2 where the second protruding portion 15b is in contact with a gap-side surface 17B of the glass plate 1A, are on an outer side of a third contour 16c which is a gap-side hole edge of the suction hole 4.

Abstract: A vehicle window glass according to the present invention includes a glass body having at least one glass plate and a film region that is stacked on a surface of the at least one glass plate, and is formed by a conductive film having a surface resistance value of 11 to 15 ?/?.

Abstract: 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.

Abstract: 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 material 15 has a first protruding portion 15a formed on an atmospheric side around a suction hole 4, and a second protruding portion 15b formed on a gap side around the suction hole 4, and as seen in a thickness direction of the glass plates 1A, 1B, a first contour 16a which is an outermost edge of a first adhesion surface portion S1 where the first protruding portion 15a is in contact with an atmospheric-side surface 17A of the glass plate 1A, and a second contour 16b which is an outermost edge of a second adhesion surface portion S2 where the second protruding portion 15b is in contact with a gap-side surface 17B of the glass plate 1A, are on an outer side of a third contour 16c which is a gap-side hole edge of the suction hole 4.

Abstract: 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.

Abstract: A glass substrate for a data recording medium is disk-shaped and has a circular bore at the center portion. At least one of an inner circumferential end surface and an outer circumferential end surface is smooth. The smooth surface is formed by exposing at least one of the inner circumferential end surface and the outer circumferential end surface of a glass disk to a laser beam. During laser machining, the end surface of the glass disk that is exposed to the laser beam is heated and melted. Therefore, minute cracks, formed on the end surface of the glass disk before the laser machining, are eliminated. As a result, the strength of the glass substrate is maintained without a chemical strengthening treatment. This eliminates disadvantages caused by the chemical strengthening step.

Abstract: A glass substrate for a data recording medium is disk-shaped and has a circular bore at the center portion. At least one of an inner circumferential end surface and an outer circumferential end surface is smooth. The smooth surface is formed by exposing at least one of the inner circumferential end surface and the outer circumferential end surface of a glass disk to a laser beam. During laser machining, the end surface of the glass disk that is exposed to the laser beam is heated and melted. Therefore, minute cracks, formed on the end surface of the glass disk before the laser machining, are eliminated. As a result, the strength of the glass substrate is maintained without a chemical strengthening treatment. This eliminates disadvantages caused by the chemical strengthening step.