WO2013060063A1

WO2013060063A1 - Glass panel of capacitive touch screen and manufacturing method therefor

Info

Publication number: WO2013060063A1
Application number: PCT/CN2011/083224
Authority: WO
Inventors: 胡伟
Original assignee: Hu Wei
Priority date: 2011-10-26
Filing date: 2011-11-30
Publication date: 2013-05-02
Also published as: CN102508586A; CN102508586B

Abstract

The present invention is suitable for use in the technical field of touch screens, and provides a manufacturing method for a glass panel of a capacitive touch screen. The method comprises the following steps: step A, on a glass base plate, making several single-sided or double-sided chamfered corners of the glass panel corresponding to the size of the glass panel; step B, chemically strengthening the glass base plate after step A; step C, cutting and fractioning the glass base plate after step B to obtain the glass panel of the capacitive touch screen. Before the post-procedures such as cutting and fractioning, the present invention makes double-sided chamfered corners of the glass panel directly on the glass base plate during the pre-treatment of the glass base plate, the corners being strengthened along with the base plate so that the chamfered corners are coated with a strengthening layer, thereby substantially improving the strength of the edge of the glass.

Description

Capacitive touch screen glass panel and manufacturing method thereof

Technical field

The invention belongs to the technical field of touch screens, and in particular relates to a capacitive touch screen glass panel and a manufacturing method thereof.

Background technique

Capacitive touch screens are available in both snap-on and single-chip styles, as described below:

The laminated capacitive touch screen is a sensing glass in a capacitive touch screen (sensor) On top of the glass, a glass cover is attached to the OCA optical tape. This glass panel is only used to protect the capacitive touch screen. The process of glass is generally: slicing (glass substrate cut into glass panel)---split---edge grinding of glass panel---chamfering---polishing---depth strengthening---printing ink; induction glass (sensor The process of glass) is generally: slicing (the original glass plate is cut into a glass substrate)---split---edging---chamfering---mild strengthening---coating---lithography-- - Slicing (glass substrate cut to the required size) - lobes. Then the glass panel (cover Glass) and sensor glass are attached. The capacitive touch screen can be used in cover glass and sensor glass. The surface of the chamfer 1 of the glass) forms a strengthening layer c on the surface of the straight side 2 of the glass between the two chamfers. As shown in Fig. 1, the capacitive touch screen can be effectively protected, but today the product is becoming smaller. This type of touch screen appears thicker and does not dominate in size.

The monolithic capacitive touch screen is a cover glass and a sensing glass of a conventional capacitive touch screen. Glass) A design of two-in-one, by directly plating a conductive film on a glass panel and forming a pattern required for capacitive sensing on the conductive film, thereby eliminating a piece of induction glass, improving transmittance and reducing cost; Moreover, the large-sized glass substrate can be directly processed, strengthened, coated with a conductive film, and patterned for capacitance sensing on the conductive film, and the utilization rate and efficiency of the device can be improved, and the cost can be reduced. However, at present, the biggest problem of the monolithic capacitive touch screen is that the strength of the edge is very low, and the edge is easily broken when it is assembled into a finished terminal product, which reduces the overall reliability. The main processing steps of the existing monolithic capacitive touch screen are:

The glass substrate cuts the lobes, as shown in FIG. 2, and cuts the original size of the glass mother board of the size a*b into a plurality of glass substrates of size a1*b1;

The glass substrate is edged and safely chamfered, see Figures 3A and 3B;

For strengthening the glass substrate, as shown in Fig. 4, a strengthening layer having a thickness c (e.g., about 10 to 50 um) is formed on both sides and edges of the glass by ion exchange;

Conducting a conductive film on a glass substrate and capacitively sensing a plurality of required patterns of size a11*b11 on the conductive film, as shown in FIG. 5;

Cutting and splicing the glass substrate into a small-sized glass panel with an inductive capacitance image of a finished product size, as shown in FIG. 6;

The glass panel is chamfered, edging, throwing, and final forming, see Figures 7A and 7B.

Such a monolithic capacitive touch screen is improved in thickness relative to the above-described bonded capacitive touch screen, but as shown in FIG. 8, since the cut glass panel has a reinforcing layer only on the bottom surface 3, the chamfer 1 There is no strengthening layer on the straight side 2 between the chamfer and the edge is very low. The chamfer 1 and the straight side 2 are usually polished, and the microcracks are removed to improve the bending resistance and impact strength of the side. But after all, there is no strengthening layer on the chamfer 1 and the straight side 2, and the method of throwing the chamfer and throwing the edge can only increase the edge strength very limited. From the point of view of the material properties of the glass itself, glass is a brittle material, and the main cause of the crack is the expansion and growth of the microcracks at the edges. In order to ensure the safety and reliability of the glass when it is used, whether it is physical tempered glass for construction, automobiles, furniture, chemically strengthened glass for electronic products, or glass containers used in daily life, it is required at the edge of the glass panel. Increase the strength.

In short, the above two capacitive touch screens cannot meet the requirements of both thickness and safety reliability.

technical problem

The technical problem to be solved by the present invention is to provide a glass panel which is safe and reliable and can be applied to a thin capacitive touch screen.

Technical solution

The present invention is achieved by a capacitive touch screen glass panel having a chemically strengthened layer on the chamfered surface and a chemically strengthened layer on the straight side of the glass.

Further, the chamfer of the capacitive touch screen glass panel is a chamfer or a curved chamfer having a straight section.

The present invention also provides a method of fabricating a capacitive touch screen glass panel as described above, comprising the steps of:

Step A, according to the size of the required glass panel, one or two-sided chamfering of several glass panels matching the size of the glass panel is made on the glass substrate;

Step B, performing chemical strengthening treatment on the glass substrate processed in step A;

In step C, the glass substrate processed in step B is cut and split to obtain a capacitive touch screen glass panel.

Further, before the step A, the method further comprises the following steps:

Step A01, cutting the original mother glass sheet into the size of the glass substrate;

In step A02, the cut glass substrate is edged and chamfered.

Further, after the step B and before the step C, the following steps are further included:

In step B1, a conductive film is plated on the glass substrate reinforced by the step B, and a pattern required for capacitive sensing is formed on the conductive film.

Further, after the step C, the method further comprises the following steps:

In step D, the glass panel is edged and edged.

Further, the step A specifically includes the following steps: forming a chamfered groove matching the chamfer size and shape of the glass panel on at least one side of the glass substrate;

The step C performs cutting and splitting along the bottom of the chamfered groove.

Further, the step A further includes the following steps:

The chamfered grooves adjacent to each other and belonging to different glass panels are joined to form a larger chamfered groove.

Further, after step A and before step B, the method further comprises the following steps:

In step A1, the chamfered grooves made around the glass panel are polished.

Beneficial effect

Compared with the prior art, the present invention directly forms a single-sided or double-sided chamfer of the finished glass panel on the glass substrate during the pre-processing of the glass substrate, and is strengthened together with the glass substrate, so that the chamfer is covered with a strengthening layer. The edge strength of the glass is fundamentally improved, and then the post-cutting process such as cutting and splitting is performed. When used for a monolithic capacitive touch screen, the present invention retains the advantages and costs of thinning all the monolithic capacitive touch screens. The advantages are also applicable to the glass panel of the laminated capacitive touch screen.

DRAWINGS

1 is a schematic view of a reinforcing layer of a conventional bonded capacitive touch screen;

2 to 8 are schematic views showing the processing of a glass panel of a conventional single-chip capacitive touch screen;

9A and FIG. 9B are schematic diagrams showing chamfering of a glass substrate around a glass panel according to an embodiment of the present invention;

10A and FIG. 10B are enlarged schematic views of a portion E of FIG. 9B according to an embodiment of the present invention;

11A and 11B are enlarged schematic views of a portion E of FIG. 9B according to another embodiment of the present invention.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to ensure the safety and reliability of the glass when it is used, whether it is physical tempered glass for construction, automobiles, furniture, chemically strengthened glass for electronic products, or glass containers used in daily life, the final strength of the glass needs to be improved. Before the process (eg physical tempering, chemical strengthening), a safety chamfer is made at the edge of the glass to prevent possible edge crack growth, thereby improving the safety and reliability of the glass.

Based on the above considerations, the present invention attaches a chemical strengthening layer to the chamfered surface of the capacitive touch screen glass panel, and the glass straight side has no chemical strengthening layer. This can improve the edge strength of the capacitive touch screen glass panel to a certain extent, and can be used for making a glass panel of a monolithic capacitive touch screen, and of course, it can also be applied to a glass panel of a laminated capacitive touch screen.

Specifically, the above capacitive touch screen glass panel can be fabricated as follows:

In step A, one or two-sided chamfering of a plurality of glass panels matching the size of the glass panel is made on the glass substrate according to the size of the desired glass panel.

Wherein, the size of the glass panel includes the size value of the chamfer. In the present invention, the chamfer is formed on the glass substrate by using the following steps: on at least one side of the glass substrate, a cross section matching the size and shape of the glass panel is as follows. The linear shape shown in Fig. 10A or the curved chamfered groove as shown in Fig. 10B, wherein the grooves adjacent to each other belonging to different glass panels are cutting-reserved portions. It is also possible to remove portions of the adjacent chamfered trenches belonging to different glass panels to form a larger chamfered trench, as shown in FIGS. 11A and 11B. As shown, the connecting portions between the grooves which are adjacent and which belong to different glass panels and which are linear or curved in cross section are removed. In order to make the surface of the glass panel bright and flat, the chamfered grooves made around the glass panel can also be polished. In a specific implementation, the chamfering may be performed only on one side of the glass substrate, or chamfering may be performed on both sides at the same time, and even the chamfering of the two sides may be made into different shapes, which is not limited. The present invention recommends that grooves be formed on both sides to maximize the strength of the glass panel.

If the incoming material is a large-size original glass mother board, or when manufacturing a one-piece capacitive touch screen, the original glass mother board is first cut into a small-sized glass substrate. Therefore, before the step A, the method further comprises the following steps:

In step A02, the cut glass substrate is edged and chamfered.

In step B, the glass substrate treated in the step A is subjected to chemical strengthening treatment.

Specifically, the glass substrate may be chemically strengthened by an ion exchange method to form a stress layer on the surface of the glass substrate. It should be understood that other chemical strengthening methods may be used in the specific implementation.

When the manufacturing method is applied to a monolithic capacitive touch screen, the following steps are also included:

In step C, the glass substrate treated in step B or step B1 is cut and split to obtain a capacitive touch screen glass panel.

When cutting, the cutting lobes can be specifically cut along the bottom of the chamfered groove described above.

Further, the step D: cutting and splitting the glass substrate processed in the step C may be further included to obtain an ideal capacitive touch screen glass panel.

The glass panel produced by the method for fabricating the glass panel provided by the invention can be applied to a single-chip capacitive touch screen, and the overall thickness and cost advantages of all the monolithic capacitive touch screens are retained while making the whole The safety and reliability are improved, and it can also be applied to the glass panel of the laminated capacitive touch screen, which is similar to the overall safety reliability of the laminated capacitive touch screen.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

A capacitive touch screen glass panel, characterized in that the chamfered surface of the capacitive touch screen glass panel is provided with a chemical strengthening layer and the glass straight side has no chemical strengthening layer.
The capacitive touch screen glass panel according to claim 1, wherein the chamfer of the capacitive touch screen glass panel is a chamfer or a curved chamfer having a straight section.
A method of fabricating a capacitive touch screen glass panel according to claim 1 or 2, comprising the steps of:

Step A, according to the size of the required glass panel, one or two-sided chamfering of several glass panels matching the size of the glass panel is made on the glass substrate;

Step B, performing chemical strengthening treatment on the glass substrate processed in step A;

In step C, the glass substrate processed in step B is cut and split to obtain a capacitive touch screen glass panel.
The method of fabricating a capacitive touch screen glass panel according to claim 3, wherein before the step A, the method further comprises the steps of:

Step A01, cutting the original mother glass sheet into the size of the glass substrate;

In step A02, the cut glass substrate is edged and chamfered.
The method of fabricating a capacitive touch screen glass panel according to claim 3, further comprising the following steps after the step B and before the step C:

In step B1, a conductive film is plated on the glass substrate reinforced by the step B, and a pattern required for capacitive sensing is formed on the conductive film.
The method of fabricating a capacitive touch screen glass panel according to claim 3, wherein after the step C, the method further comprises the steps of:

In step D, the glass panel is edged and edged.
The method of fabricating a capacitive touch screen glass panel according to claim 3, wherein the step A comprises the following steps: at least one side of the glass substrate is formed to match the chamfer size and shape of the glass panel. An angle groove; the step C performs cutting and splitting along the bottom of the chamfered groove.
The method of fabricating a capacitive touch screen glass panel according to claim 7, wherein the step A further comprises the following steps:

The chamfered grooves adjacent to each other and belonging to different glass panels are joined to form a larger chamfered groove.
The method of fabricating a capacitive touch screen glass panel according to claim 7 or 8, wherein after the step A and before the step B, the method further comprises the following steps:

In step A1, the chamfered grooves made around the glass panel are polished.