Tempered glass and method for producing same

Abstract

This tempered glass has a compressive stress layer on the surface and is characterized by having a glass composition which contains, in mol%, 45-75% of SiO2, 3-15% of Al2O3, 0-12% of Li2O, 0.3-20% of Na2O, 0-10% of K2O and 1-15% of MgO + CaO, with the molar ratio of (Al2O3 + Na2O + P2O5) / SiO2 being 0.1-1, the molar ratio of (B2O3 + Na2O) / SiO2 being 0.1-1, the molar ratio of P2O5 / SiO2 being 0-1, the molar ratio of Al2O3 / SiO2 being 0.01-1 and the molar ratio of Na2O / Al2O3 being 0.1-5. This tempered glass is also characterized in that the surface or the end faces thereof are etched after the tempering treatment.

Description

technical field

[0001] The present invention relates to strengthened glass and its manufacturing method, and in particular to a strengthened glass suitable as a cover glass for a mobile phone, a digital camera, a PDA (portable personal computer), a solar cell, or a substrate of a display, especially a touch panel display, and a manufacturing method thereof. Background technique

[0002] Devices such as mobile phones, digital cameras, PDAs, touch panel monitors, large TVs, and wireless chargers tend to become increasingly popular.

[0003] Tempered glass tempered by ion exchange treatment or the like is used for these devices (see Patent Document 1 and Non-Patent Document 1).

[0004] Conventional equipment employs a configuration in which a touch panel sensor is formed on a display module, and tempered glass (protective material) is placed on the touch panel sensor.

[0005] In addition, small devices such as mobile phones have a size of 3 to 4 inches, and tablet PCs (Table...

Examples

Embodiment 1

[0109] Hereinafter, examples of the present invention will be described. It should be noted that the following examples are merely examples. The present invention is not limited by the following examples.

[0110] Tables 1 to 3 show examples (sample Nos. 1 to 21) of the present invention. In addition, "not" in the table means not measured.

[0111] 【Table 1】

[0112] [Table 1]

[0113]

[0114] 【Table 2】

[0115] [Table 2]

[0116]

[0117] 【table 3】

[0118] [table 3]

[0119]

[0120] Each sample in the table was prepared as follows. First, glass raw materials were prepared according to the glass composition in the table, and melted at 1580° C. for 8 hours using a platinum boat. Then, the resulting molten glass was flowed onto a carbon plate to be formed into a plate shape. Various characteristics were evaluated about the obtained glass plate. In addition, as the measurement sample of strengthening characteristic, the glass plate processed to the plate th...

Embodiment 2

[0135] The glass raw materials prepared according to the glass composition described in sample No. 21 were put into a continuous melting furnace, heated, melted and clarified, and formed by a float method so that the plate thickness was 0.8 mm. Next, after processing the obtained glass into 1m×1.2m, the KNO at 420°C 3 Ion exchange treatment was performed by immersing in molten salt for 2 hours.

[0136] For the resulting strengthened glass, according to Figure 1A After patterning the ITO on the rectangle (for the XY direction) in this way, as Figure 1B In this way, patterning of the insulating film is performed. Furthermore, if Figure 1C In this way, the metal film bridge patterning (Y direction) was performed, and the touch panel sensor was formed on the tempered glass.

[0137] Next, masking was performed with Au in a size of 170 mm×100 mm (R=7 mm at the corner). Next, the touch panel sensor and the strengthened glass with an Au mask were immersed in 48% by mass of HF...

technical field

[0001] The present invention relates to strengthened glass and its manufacturing method, and in particular to a strengthened glass suitable as a cover glass for a mobile phone, a digital camera, a PDA (portable personal computer), a solar cell, or a substrate of a display, especially a touch panel display, and a manufacturing method thereof. Background technique

[0002] Devices such as mobile phones, digital cameras, PDAs, touch panel monitors, large TVs, and wireless chargers tend to become increasingly popular.

[0003] Tempered glass tempered by ion exchange treatment or the like is used for these devices (see Patent Document 1 and Non-Patent Document 1).

[0004] Conventional equipment employs a configuration in which a touch panel sensor is formed on a display module, and tempered glass (protective material) is placed on the touch panel sensor.

[0005] In addition, small devices such as mobile phones have a size of 3 to 4 inches, and tablet PCs (Table...

Examples

Embodiment 1

[0109] Hereinafter, examples of the present invention will be described. It should be noted that the following examples are merely examples. The present invention is not limited by the following examples.

[0110] Tables 1 to 3 show examples (sample Nos. 1 to 21) of the present invention. In addition, "not" in the table means not measured.

[0111] 【Table 1】

[0112] [Table 1]

[0113]

[0114] 【Table 2】

[0115] [Table 2]

[0116]

[0117] 【table 3】

[0118] [table 3]

[0119]

[0120] Each sample in the table was prepared as follows. First, glass raw materials were prepared according to the glass composition in the table, and melted at 1580° C. for 8 hours using a platinum boat. Then, the resulting molten glass was flowed onto a carbon plate to be formed into a plate shape. Various characteristics were evaluated about the obtained glass plate. In addition, as the measurement sample of strengthening characteristic, the glass plate processed to the plate th...

Embodiment 2

[0135] The glass raw materials prepared according to the glass composition described in sample No. 21 were put into a continuous melting furnace, heated, melted and clarified, and formed by a float method so that the plate thickness was 0.8 mm. Next, after processing the obtained glass into 1m×1.2m, the KNO at 420°C 3 Ion exchange treatment was performed by immersing in molten salt for 2 hours.

[0136] For the resulting strengthened glass, according to Figure 1A After patterning the ITO on the rectangle (for the XY direction) in this way, as Figure 1B In this way, patterning of the insulating film is performed. Furthermore, if Figure 1C In this way, the metal film bridge patterning (Y direction) was performed, and the touch panel sensor was formed on the tempered glass.

[0137] Next, masking was performed with Au in a size of 170 mm×100 mm (R=7 mm at the corner). Next, the touch panel sensor and the strengthened glass with an Au mask were immersed in 48% by mass of HF...

Images