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US 6,551,715 B1Granted
Glass sheet with conductive film and glass article using the same
AssigneesNippon Sheet Glass Co., Ltd., Kaneka Corporation
InventorsYasunori Seto, Akira Fujisawa, Tsuyoshi Otani, Masahiro Hirata
Life of this patent
Estimating the term…
Abstract
When a transparent conductive film formed on a glass sheet is heat-treated in the air, its conductivity decreases. Even if the conductivity is increased by a heat treatment in a nitrogen atmosphere or the like beforehand, it decreases considerably by heating in the air during a processing step to obtain a final product. The present invention provides a glass sheet with a transparent conductive film, in which the increasing rate of its sheet resistance is 15% or lower even after heating at 450° C. in the air for three hours.
Claims11
A glass sheet with a transparent conductive film, comprising:
- a glass sheet;
- and
- a transparent conductive film with a thickness of at least 400 nm to 1200 nm formed on the glass sheet, said transparent conductive film including a tin oxide as a main component,
- wherein the transparent conductive film is formed on the glass sheet or a glass ribbon during a manufacturing process of the glass sheet at a temperature of 600° C. or more, and an increase in sheet resistance of the transparent conductive film due to a heat treatment at 450° C. in the air for three hours is 15% or lower when the sheet resistance before the heat treatment is taken as a reference;
- wherein between the transparent conductive film and the glass sheet, a first intermediate film with a thickness of 5 nm to 50 nm and a second intermediate film with a thickness of 5 nm to 50 nm are formed sequentially from a side of the glass sheet;
- and
- said first intermediate film includes tin oxide as a main component and said second intermediate film includes a main component selected from the group of silicon oxide and aluminum oxide.
4 more elements
A glass sheet with a transparent conductive film, comprising:
- a glass sheet;
- and
- a transparent conductive film with a thickness of at least 400 nm to 1200 nm formed on the glass sheet, said transparent conductive film including a tin oxide as a main component,
- wherein the transparent conductive film is formed on the glass sheet or a glass ribbon during a manufacturing process of the glass sheet at a temperature of 600° C. or more, and an increase in sheet resistance of the transparent conductive film due to a heat treatment at 450° C. in the air for three hours is 15% or lower when the sheet resistance before the heat treatment is taken as a reference;
- wherein between the transparent conductive film and the glass sheet, a first intermediate film with a thickness of 5 nm to 50 nm and a second intermediate film with a thickness of 5 nm to 50 nm are formed sequentially from a side of the glass sheet;
- said first intermediate film includes tin oxide as a main component and said second intermediate film includes a main component selected from the group of silicon oxide and aluminum oxide;
- and
- said sheet resistance of the transparent conductive film before the heat treatment is 25 Ω/sq. or lower.
5 more elements
A glass sheet with a transparent conductive film, comprising:
- a glass sheet;
- a transparent conductive film with a thickness of at least 400 nm to 1200 nm formed on the glass sheet, said transparent conductive film including tin oxide as a main component,
- wherein the transparent conductive film is formed on the glass sheet or a glass ribbon during a manufacturing process of the glass sheet at a temperature of 600° C. or more, and an increase in sheet resistance of the transparent conductive film due to a heat treatment at 450° C. in the air for three hours is 15% or lower when the sheet resistance before the heat treatment is taken as a reference;
- wherein between the transparent conductive film and the glass sheet, a first intermediate film with a thickness of 5 nm to 50 nm and a second intermediate film with a thickness of 5 nm to 50 nm are formed sequentially from a side of the glass sheet;
- said first intermediate film includes tin oxide as a main component and said second intermediate film includes a main component selected from the group of silicon oxide and aluminum oxide;
- and
- both the first and the second intermediate film and the transparent conductive film are formed by a pyrolytic oxidation reaction of a coating-film forming material on a glass sheet or a glass ribbon during a manufacturing process of the glass sheet, which has a temperature of at least 600° C.
4 more elements
Dependencies are inferred from the claim text.