TWI773024B - Bendable glass and manufacturing method thereof - Google Patents

Abstract

A bendable glass and manufacturing method thereof are provided by the present invention. The bendable glass includes a first surface and a second surface. A groove is disposed on the first surface toward the second surface. The groove has a bottom portion, wherein a thickness from the bottom portion extending toward the second surface ranges from 0.03 to 0.06mm. Therefore, the bendable glass is provided with bendable function.

Description

Flexible glass and method of making the same

The present invention relates to a glass, especially a flexible glass and a manufacturing method thereof.

According to the above, glass is widely used, for example, it is used in portable electronic devices or in-vehicle electronic display devices, and it can also be used as a glass protector for display screens.

At present, electronic products with bendable or foldable screens are gradually accepted by consumers, and the demand for bendable or foldable glass is simultaneously increasing.

The thinner the glass, the higher the ability to bend and bend, but it is relatively easy to break, and the thin glass also has a problem of insufficient strength.

Therefore, how to overcome the current problems is one of the problems to be solved by the present invention.

In order to solve the above problem, the present invention discloses a flexible glass and a manufacturing method thereof. The glass surface is provided with a groove, and the thickness of the glass at the groove position is between 0.03 mm and 0.6 mm, so that the glass has a flexural bending. Ability.

In order to achieve the above object, an embodiment of the present invention provides a flexible glass, which has a first surface and a second surface, the first surface is provided with a groove toward the second surface, and the groove has a groove bottom , the thickness from the groove bottom to the extending direction of the second surface is between 0.03 and 0.6 mm.

In order to achieve the above object, another embodiment of the present invention provides a manufacturing method of flexible glass, which includes the following steps: providing a glass substrate, the glass substrate has a first surface and a second surface; A groove is formed on the first surface, the groove has a groove bottom, and the thickness from the groove bottom to the extending direction of the second surface is between 0.03 and 0.6 mm; then the glass substrate is chemically strengthened.

Thereby, the thickness of the glass substrate of the present invention at the groove position is between 0.03 and 0.6 mm, so that the glass substrate has the ability to be flexed and bent, so as to be suitable for use in a foldable display and meet the needs of the industry.

100: Flexible glass

10: Glass substrate

11: The first surface

12: Second surface

13: First End

14: Second End

15: Groove

151: groove bottom

16: Connection segment

17: Flex grooves

171: groove bottom

D1: Thickness

D2: Thickness

W1: The width of the first slot

W2: Second slot width

20: Reinforcement layer

20a: Reinforcement layer

Fig. 1 is a schematic view of the appearance of the first embodiment of the flexible glass of the present invention.

[Fig. 2] is a schematic cross-sectional view of the first embodiment of the flexible glass of the present invention, showing that the groove is a rectangle.

[ Fig. 3 ] is a schematic diagram of bending of the flexible glass of the present invention.

[Fig. 4] is a schematic cross-sectional view of the second embodiment of the flexible glass of the present invention, showing that the groove is arc-shaped.

FIG. 5 is a schematic cross-sectional view of the third embodiment of the flexible glass of the present invention, showing that it has grooves and flexing grooves.

Fig. 6 is a schematic cross-sectional view of the fourth embodiment of the flexible glass of the present invention, showing that the entire first surface has a strengthening layer.

Fig. 7 is a schematic flow chart of the manufacturing method of the flexible glass of the present invention.

Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings, and are not intended to limit the technical principles of the present invention to the specific disclosed embodiments, but the scope of the present invention is limited only by the scope of the patent application, covering substitutions, modifications, and equivalent.

Please refer to FIG. 1 to FIG. 3 , which are a first embodiment of a flexible glass 100 of the present invention, which includes a glass substrate 10 having a first surface 11 and a second surface 12 . The first surface Two sides of 11 and the second surface 12 are a first end 13 and a second end 14 . The thickness D1 of the first surface 11 to the second surface 12 of the glass substrate 10 is between 1 mm and 4 mm.

A groove 15 is formed on the first surface 11 of the glass substrate 10 toward the second surface 12 . The groove 15 has a groove bottom 151 , and a thickness D2 extending from the groove bottom 151 to the second surface 12 is between 0.03 and 0.6 mm. The thickness of the glass at the position of the groove 15 is between 0.03 and 0.6 mm. If the measured thickness D2 is less than 0.03mm, the thickness of the glass at the groove 15 is relatively thin, and under the four-point bending test, the strength is obviously insufficient and it is easy to break; and when the thickness of the glass at the groove 15 is greater than 0.6 mm mm, it is not easy to flex due to its thick thickness. Therefore, in the embodiment of the present invention, in order to make the glass have certain strength and flexibility, the aforementioned distance D2 is preferably between 0.05 and 0.4 mm. In this embodiment, the groove 15 is rectangular, while in the second embodiment shown in FIG. 4 , the groove is rectangular.

The groove 15 is located between the first end 13 and the second end 14. The first end 13 and the second end 14 have a connecting section 16, the connecting section 16 corresponds to the position of the groove 15, and the connecting section 16 is made of glass. Where the substrate 10 is thinner. Therefore, the first end 13 and the second end 14 of the glass substrate 10 can be bent relative to each other by the setting of the groove 15 , and after testing, the curvature radius R of the connecting section 16 is between 18 mm and 22 mm. as before As mentioned above, if the thickness of the glass in the groove 15 is greater than 0.6 mm, although it has a certain strength, the flexing ability is poor, and a large bending degree cannot be achieved, but in the embodiment of the present invention, the thickness D2 is between 0.03 Therefore, the radius of curvature R of the connecting section 16 can be up to 20 mm.

The groove 15 has a first groove width W1. When the first groove width W1 is too large, the strength of the glass substrate 10 will be affected. If the first groove width W1 is too small, it is difficult to bend. Therefore, the first groove width W1 Between 20mm and 70mm is preferred.

In another embodiment of the present invention, the first surface 11 of the glass substrate 10 is provided with a reinforcement layer 20 , and the reinforcement layer 20 partially fills the groove 15 . The strengthening layer 20 includes a phenyl polymer, epoxy resin, and ink. The ink corresponds to the area of the glass (Black Matrix, BM) for shielding the electronic circuit. In addition, the monomer carbon chain length of the phenyl polymer is between C6 and C18, which can improve the impact resistance of the glass substrate 10, and the epoxy resin is used to increase the toughness of the reinforcement layer 20 and increase the contact with the glass substrate. The adhesion of the glass substrate 10 makes it difficult for the glass substrate 10 to be broken due to stress concentration in the grooves 15 , so that the bonding strength of the grooves 15 is improved through the strengthening layer 20 .

As shown in FIG. 3 , the glass substrate 10 of the present invention has the function of bending and bending, and the overall structure is not too thin to be easily broken, so that it is suitable for flexible displays.

Please refer to FIG. 5 , which is a third embodiment of a flexible glass 100 of the present invention. The same component numbers as those in the first embodiment represent the same components, structures and functions, so they are not used in this embodiment. Repeat. Wherein, the second surface 12 is provided with a deflection groove 17 in the direction of the first surface 11, the deflection groove 17 corresponds to the groove 15, and the connecting section 16 is located between the groove 15 and the deflection groove 17, and in this case In the embodiment, the thickness D2 refers to the distance from the groove bottom 151 of the groove 15 to the groove bottom 171 of the flex groove 17 .

Furthermore, the flexing groove 17 has a second groove width W2, and the second groove width W2 is between 20 mm and 70 mm.

Therefore, the flexible glass 100 provided with the grooves 15 and the flexing grooves 17 on the first surface 11 and the second surface 12 respectively has the effect of bending and bending.

Please refer to FIG. 6 , which is a fourth embodiment of a flexible glass 100 of the present invention. The same component numbers as those in the first embodiment represent the same components, structures and functions, so they are not used in this embodiment. Repeat. Wherein, the first surface 11 of the glass substrate 10 all has a reinforcement layer 20a, and the reinforcement layer 20a is a transparent layer. However, in other embodiments, the strengthening layer 20 a may be disposed on the entire second surface 12 , or the strengthening layer 20 a may be disposed on both the first surface 11 and the second surface 12 , so as to improve the bending resistance of the glass substrate 10 Folding effect.

Please refer to FIG. 7 in conjunction with FIG. 2 , which is a manufacturing method of the flexible glass 100 provided by the first embodiment of the present invention, including the following steps:

In step S1, the glass substrate 10 is provided, and the thickness of the first surface 11 to the second surface 12 is between 1 mm and 4 mm.

In step S2, a groove 15 is formed on the first surface 11 of the glass substrate 10 by etching and polishing. The thickness D2 is between 0.03 and 0.6 mm, the further thickness D2 is between 0.05 and 0.4 mm, and the first groove width W1 of the groove 15 is between 20 mm and 70 mm.

In step S3, next, the glass substrate 10 is chemically strengthened. For example, the glass substrate 10 is immersed in a potassium nitrate solution to perform chemical ion exchange, so as to improve the surface strength of the glass substrate 10 .

In another embodiment of the present invention, after step S3 , the reinforcement layer 20 is formed on the first surface 11 , and the reinforcement layer 20 is partially filled into the groove 15 . Wherein the strengthening layer 20 includes phenyl polymer, epoxy resin Resin, ink, the ink corresponds to the (Black Matrix, BM) area of the glass to block the electronic circuit. The monomer carbon chain length of the high molecular polymer of phenyl is between C6 and C18.

The radius of curvature of the connecting section 16 of the glass substrate 10 is between 18 mm and 22 mm, and the radius of curvature of the connecting section 16 is preferably 20 mm. The fabrication of the flexible glass 100 is completed through the aforementioned fabrication method.

In another manufacturing method of the flexible glass 100 of the present invention (ie, corresponding to the third embodiment disclosed in FIG. 5 ), in step S2 , after the groove 15 is formed, the second surface 12 faces the first surface after the groove 15 is formed. A deflection groove 17 is formed in the 11 direction, the deflection groove 17 corresponds to the groove 15, the connecting section 16 is located between the groove 15 and the deflection groove 17, and the deflection groove 17 has a second groove width W2, the first The width W2 of the two grooves is between 20mm and 70mm.

In summary, the present invention has the following advantages:

1. The thickness D1 of the glass substrate 10 of the present invention at the position of the groove 15 is between 0.03 and 0.6 mm, so that the glass substrate 10 has the ability to bend and bend, and at the same time, under this condition, the glass substrate 10 still maintains a certain structural strength , so that it fits on a foldable display.

2. The first surface 11 of the glass substrate 10 of the present invention is provided with a reinforcing layer 20 which partially fills the grooves 15 to enhance the bonding strength of the grooves 15 and increase the structural strength of the whole glass, making it difficult to break.

Although the present invention has been described in terms of a preferred embodiment, those skilled in the art can make various changes without departing from the spirit and scope of the invention. The above-mentioned embodiments are only used to illustrate the present invention, but not to limit the scope of the present invention. All modifications or changes that do not violate the spirit of the present invention shall fall within the scope of the patent application of the present invention.

10: glass substrate 11: first surface 12: The second surface 13: The first end 14: Second end 15: Groove 151: Bottom of groove 16: Connection section D1: Thickness D2: Thickness W1: The width of the first groove 20: Reinforcement layer

Claims (10)

A flexible glass, which has a first surface and a second surface, the first surface is provided with a groove toward the second surface, the groove has a groove bottom, from the groove bottom to the second surface The thickness in the extending direction is between 0.03 and 0.6mm, the groove has a first groove width, the first groove width is between 20mm and 70mm, the first surface is provided with a strengthening layer, and the strengthening layer is partially filled with into the groove, the strengthening layer includes a phenyl polymer and an epoxy resin; the monomer carbon chain length of the phenyl polymer is between C6 and C18. The flexible glass of claim 1, wherein the thickness is between 0.05 and 0.4 mm. The flexible glass of claim 1, further comprising a first end and an oppositely disposed second end, the groove is located between the first end and the second end, the first end and the first end The two ends have a connecting section, the connecting section corresponds to the position of the groove, the first end and the second end can be relatively curved, so that the curvature radius of the connecting section is between 18mm and 22mm. The flexible glass according to claim 3, wherein the groove is arc-shaped or rectangular; the thickness of the first surface to the second surface is between 1 mm and 4 mm; the radius of curvature of the connecting section is 20mm. The flexible glass according to claim 3 or 4, wherein the second surface is provided with a flexing groove toward the first surface, the flexing groove corresponds to the groove, and the connecting section is located in the groove Between the groove and the deflection groove, the deflection groove has a second groove width, and the second groove width is between 20 mm and 70 mm. A manufacturing method of flexible glass, comprising the following steps: providing a glass substrate, the glass substrate has a first surface and a second surface; A groove is formed on the first surface of the glass substrate, the groove has a groove bottom, the thickness from the groove bottom to the extending direction of the second surface is between 0.03 and 0.6 mm, and the groove has a first groove width, the first groove width is between 20mm and 70mm; chemically strengthening the glass substrate; and forming a strengthening layer on the first surface, the strengthening layer partially fills the groove, the strengthening layer comprises benzene based on high molecular polymer and epoxy resin; the monomer carbon chain length of the phenyl based high molecular polymer is between C6 and C18. The manufacturing method of flexible glass according to claim 6, wherein the thickness is between 0.05 and 0.4 mm. The manufacturing method of flexible glass according to claim 6, further comprising a first end and an oppositely disposed second end, the groove is located between the first end and the second end, the first end There is a connecting section with the second end, the connecting section corresponds to the position of the groove, the first end and the second end can be relatively curved, so that the radius of curvature of the connecting section is between 18mm and 22mm. The manufacturing method of flexible glass according to claim 8, wherein the groove is arc-shaped or rectangular; the thickness of the first surface to the second surface is between 1 mm and 4 mm; The radius of curvature is 20mm. The manufacturing method of flexible glass according to claim 8 or 9, wherein after the groove is formed, a flex groove is formed on the second surface toward the first surface, and the flex groove is formed. Corresponding to the groove; the connecting section is located between the groove and the deflection groove, the deflection groove has a second groove width, and the second groove width is between 20mm and 70mm.

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