CN110357443B - Preparation method of thinned glass panel, thinned glass panel and display device - Google Patents

Abstract

The invention relates to a preparation method of a thinned glass panel, the thinned glass panel and a display device. The preparation method of the thinned glass panel comprises the following steps: providing a glass panel, wherein the glass panel is provided with a surface to be thinned; arranging a first protective film on one side of the glass panel, which is far away from the surface to be thinned, and enabling the orthographic projection of the glass panel on the first protective film to fall in the first protective film; arranging a second protective film on one side of the first protective film, which is far away from the glass panel, wherein the area of the second protective film is larger than that of the glass panel; fixing the glass panel on the partition board, positioning a second protective film between the partition board and the glass panel, and enabling the orthographic projection of the glass panel on the partition board to fall in the partition board, wherein the area of the second protective film is smaller than or equal to that of the partition board; and thinning the glass panel fixed on the partition plate to obtain a thinned glass panel. By adopting the method, the thinned glass panel with higher yield can be prepared.

Description

Preparation method of thinned glass panel, thinned glass panel and display device

technical field

The present invention relates to the field of display technology, in particular to a method for preparing a thinned glass panel, a thinned glass panel and a display device.

Background technique

With the development of information technology and the upgrading of consumer demand, people's requirements for the lightening and thinning of mobile terminals are increasing day by day. The industry generally adopts the reduction of the thickness of the glass panel of the display device to achieve the effect of reducing the thickness and weight at the same time to cope with market competition. Generally, when the glass is thinned, the glass panel is directly placed in the etching basket and entered into the etching machine for etching, and the purpose of reducing the basic thickness is achieved by chemical methods. When etching is performed in the above manner, the edge effect of the fabricated glass panel is not good, resulting in a low yield rate after thinning, which affects the later process.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a method for preparing a thinned glass panel, and a thinned glass panel with a high yield rate can be prepared by using the method.

In addition, a thinned glass panel and a display device are also provided.

A preparation method of a thinned glass panel, comprising the following steps:

providing a glass panel having a face to be thinned;

Disposing a first protective film on the side of the glass panel away from the surface to be thinned, and making the orthographic projection of the glass panel on the first protective film fall in the first protective film;

A second protective film is arranged on the side of the first protective film away from the glass panel, and the area of the second protective film is larger than that of the glass panel;

The glass panel is fixed on the partition, the second protective film is located between the partition and the glass panel, and the orthographic projection of the glass panel on the partition falls on the In the separator, wherein the area of the second protective film is less than or equal to the area of the separator; and

A thinning process is performed on the glass panel fixed to the separator to obtain a thinned glass panel.

The preparation method of the above-mentioned thinned glass panel is by arranging a first protective film on the side of the glass panel away from the thinned surface, and making the orthographic projection of the glass panel on the first protective film fall in the first protective film, so as to prevent the glass panel on the glass panel. It is not necessary to protect the thinned position. Furthermore, by arranging the second protective film on the side of the first protective film away from the glass panel, the area of the glass panel is smaller than the area of the second protective film, so that the glass panel can be further protected. At the position that needs to be thinned, the glass panel provided with the second protective film is fixed on the partition, so that the second protective film is located between the partition and the glass panel, and the orthographic projection of the glass panel on the partition falls on the partition. In the partition, the area of the second protective film is less than or equal to the area of the partition, so that the glass panel can be fixed on the partition through the second protective film, and the edge of the glass panel can be prevented from being rubbed to ensure the edge of the glass panel. Therefore, the yield rate after thinning is improved, and the thinning effect of the surface to be thinned is ensured, and a thinned glass panel with a high yield rate is prepared. It has been verified by experiments that the thickness of the thinned glass panel obtained by the above-mentioned preparation method of the thinned glass panel is 0.06 mm to 0.5 mm, and the yield rate is 99.0% to 99.9%.

In one embodiment, the first protective film is a UV dissociation film or an acid-resistant film, and the second protective film is a UV dissociative film or an acid-resistant film.

In one embodiment, the separator is an acid-resistant plate.

In one embodiment, the step of arranging a second protective film on a side of the first protective film away from the glass panel includes: arranging a second protective film on a side of the first protective film away from the glass panel two protective films, so that the orthographic projection of the glass panel on the second protective film falls in the second protective film, and the edge of the orthographic projection of the glass panel on the second protective film The distance between the edges of the second protective film is 4 mm˜15 mm.

In one embodiment, in the step of fixing the glass panel on the separator, the orthographic projection of the second protective film on the separator falls on the separator.

In one embodiment, a first protective film is disposed on the side of the glass panel away from the surface to be thinned, so that the orthographic projection of the glass panel on the first protective film falls on the After the step in the first protective film, before the step of arranging the second protective film on the side of the first protective film away from the glass panel, the method further includes the following steps: sealing and curing the glass panel deal with.

In one embodiment, the step of performing edge sealing and curing on the glass panel includes: using UV glue to perform edge sealing on the edge of the glass panel, and performing edge sealing on the glass panel after the edge sealing. UV curing treatment.

In one embodiment, the step of performing a thinning process on the glass panel fixed to the separator to obtain the thinned glass panel includes:

The glass panel fixed on the separator is pre-etched with a first etching solution, the first etching solution includes 1.40g/L～1.60g/L H ₂ SO ₄ and 1.12g/L～1.14g /L of HF; and

The pre-etched glass panel is etched with a second etching solution to obtain the thinned glass panel, and the second etching solution includes 1.05 g/L to 1.06 g/L of HF.

A thinned glass panel is prepared by the above-mentioned preparation method of the thinned glass panel.

A display device includes the above-mentioned thinned glass panel.

Description of drawings

FIG. 1 is a schematic structural diagram of a method for manufacturing a thinned glass panel according to an embodiment after disposing a first protective film on the glass panel;

2 is a schematic cross-sectional view of the method for preparing a thinned glass panel according to the embodiment shown in FIG. 1 after the glass panel provided with the second protective film is fixed on the separator;

FIG. 3 is a schematic view of the structure after fixing the glass panel provided with the second protective film on the separator in the manufacturing method of the thinned glass panel according to the embodiment shown in FIG. 1 .

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

As shown in FIGS. 1 to 2 , the method for manufacturing a thinned glass panel according to an embodiment can prepare a thinned glass panel with good edge effect and high yield, which can be applied to a display device. Specifically, the preparation method of the thinned glass panel includes the following steps S110-S150:

S110 , providing a glass panel 110 , where the glass panel 110 has a surface 112 to be thinned.

In one embodiment, the glass panel 110 is a TFT-LCD (thin film transistor-liquid crystal display, thin film transistor liquid crystal display) glass panel. It should be noted that the glass panel 110 is not limited to the above-mentioned glass panel, and may also be other glass panels, for example, an OLED (Organic Light-Emitting Diode, organic light-emitting diode) glass panel.

In one of the embodiments, before S110, quality inspection of the glass panel 110 is also included. The quality inspection of the glass panel 110 is carried out to check whether the glass panel 110 is flat, intact, uneven or not.

S120 , disposing the first protective film 120 on the side of the glass panel 110 away from the surface to be thinned 112 , and making the orthographic projection of the glass panel 110 on the first protective film 120 fall on the first protective film 120 .

By arranging the first protective film 120 on the side of the glass panel 110 away from the surface to be thinned 112 and making the orthographic projection of the glass panel 110 on the first protective film 120 fall on the first protective film 120, There is no need for thinning locations for protection.

In one embodiment, the first protective film 120 is a UV dissociation film or an acid-resistant film. Among them, the UV dissociation film has viscosity, can be attached to the object, and is dissociated from the object by the ultraviolet light irradiation of the UV curing machine.

In one embodiment, the step of disposing the first protective film 120 on the side of the glass panel 110 away from the surface to be thinned 112 includes: sticking or vacuum adsorbing the first protective film 120 on the side of the glass panel 110 away from the surface to be thinned 112 . Further, the first protective film 120 is pasted on the surface of the glass panel 110 opposite to the surface to be thinned 112 .

In one embodiment, the first protective film 120 is a UV dissociative film, and the step of disposing the first protective film 120 on the side of the glass panel 110 away from the surface to be thinned 112 includes: on the glass panel 110 away from the surface to be thinned 112 The first protective film 120 is attached to one side.

In one embodiment, the first protective film 120 is an acid-resistant film, and the step of disposing the first protective film 120 on the side of the glass panel 110 away from the surface to be thinned 112 includes: on a side of the glass panel 110 away from the surface to be thinned 112 The first protective film 120 is attached to the side, and the edge sealing and curing process are performed. Further, the steps of performing edge sealing and curing treatment include: using UV glue to perform edge sealing processing on the edge of the glass panel 110 , and performing UV curing treatment on the edge-sealed glass panel 110 . The edge of the glass panel 110 can be protected by UV glue edge sealing and UV light irradiation to cure the UV glue, so as to prevent the glass panel 110 from being damaged by friction.

Further, the method of performing the edge sealing treatment is dispensing. The gap between the edge of the glass panel 110 and the first protective film 120 can be prevented by dispensing glue. Further, the method of performing the edge sealing treatment is horizontal dispensing. Horizontal glue dispensing is performed on the four sides of the glass panel 110 to ensure that the glue is sealed with the first protective film 120 and the glass panel 110 . Specifically, the height of the glue is equal to or lower than the height of the glass. The dispensing pressure is 0.2MPa to 0.6MPa. The wavelength of ultraviolet light is 340nm～400nm. The curing time is 80s to 120s. Optionally, the dispensing pressure is 0.5 MPa to 0.6 MPa. The curing time is 100s.

In one embodiment, the area of the glass panel 110 is smaller than that of the first protective film 120 .

In one embodiment, a first protective film 120 is disposed on a side of a glass panel 110 away from the surface to be thinned 112 . Further, the distance between the edge of the first protective film 120 of the glass panel 110 and the edge of the first protective film 120 is defined as D1. D1 is 1 mm to 10 mm. This arrangement is beneficial to protect the positions on the glass panel 110 that do not need to be thinned.

In one embodiment, the same first protective film 120 is disposed on the multiple glass panels 110 . A plurality of glass panels 110 are disposed on the first protective film 120 at intervals. The distance between adjacent glass panels 110 is defined as D2, and D2 is greater than 20 mm. The distance (ie, D1 ) between the edge of the orthographic projection of the glass panel 110 on the first protective film 120 near the edge of the first protective film 120 and the edge of the first protective film 120 (ie, D1 ) is 1 mm˜10 mm. This arrangement is beneficial to protect the positions on the glass panel 110 that do not need to be thinned. Further, one piece of the first protective film 120 is disposed on 6 to 9 glass panels 110 at the same time. It should be noted that the number of glass panels 110 simultaneously disposed on the first protective film 120 is not limited to the above-mentioned range, and may be less than 6 or greater than 9, and may be set as required.

S130 , disposing a second protective film 130 on the side of the first protective film 120 away from the glass panel 110 , and the area of the glass panel 110 is smaller than that of the second protective film 130 .

The positions on the glass panel 110 that do not need to be thinned are further protected by the second protective film 130 , and the glass panel 110 can be fixed on other objects by the second protective film 130 .

In one embodiment, the second protective film 130 is a UV dissociation film or an acid-resistant film.

In one embodiment, the step of disposing the second protective film 130 on the side of the first protective film 120 away from the glass panel 110 includes: disposing the second protective film 130 on the side of the first protective film 120 away from the glass panel 110 , And the orthographic projection of the glass panel 110 on the second protective film 120 falls within the second protective film 130 . This arrangement can further protect the glass panel 110 where thinning is not required.

Further, the second protective film 130 is disposed on the side of the first protective film 120 away from the glass panel 110 by sticking or vacuum adsorption. Furthermore, the second protective film 130 is pasted on the side of the first protective film 120 away from the glass panel 110 .

In one embodiment, the second protective film 130 is a UV dissociation film, and the step of disposing the second protective film 130 on the side of the first protective film 120 away from the glass panel 110 includes: placing the first protective film 120 away from the glass panel The second protective film 130 is attached to one side of the 110 , and the orthographic projection of the glass panel 110 on the second protective film 120 falls in the second protective film 130 .

In one embodiment, the second protective film 130 is an acid-resistant film, and the step of disposing the second protective film 130 on the side of the first protective film 120 away from the glass panel 110 includes: placing the first protective film 120 away from the glass panel 110 The second protective film 130 is attached to one side of the glass panel 110 , so that the orthographic projection of the glass panel 110 on the second protective film 120 falls in the second protective film 130 , and edge sealing and curing are performed. Further, the steps of performing edge sealing and curing include: using UV glue to perform edge sealing on the edge of the glass panel 110 provided with the second protective film 130 , and then performing UV curing. The edge of the glass panel 110 can be protected by UV glue edge sealing and UV light irradiation to cure the UV glue, so as to prevent the glass panel 110 from being damaged by friction.

Further, the method of performing the edge sealing treatment is dispensing. The gap between the edge of the glass panel 110 and the second protective film 130 can be prevented by dispensing glue. Further, the method of performing the edge sealing treatment is horizontal dispensing. Horizontal glue dispensing is performed on the four sides of the glass panel 110 to ensure that the glue is sealed with the second protective film 130 and the glass panel 110 . Specifically, the height of the glue is equal to or lower than the height of the glass. The dispensing pressure is 0.2MPa to 0.6MPa. The wavelength of ultraviolet light is 340nm～400nm. The curing time is 80s to 120s. Optionally, the dispensing pressure is 0.5 MPa to 0.6 MPa. The curing time is 100s.

In one embodiment, the distance between the edge of the orthographic projection of the glass panel 110 on the second protective film 130 and the edge of the second protective film 130 is defined as D3. D3 is 4mm to 15mm. This arrangement is beneficial to prevent the glass panel 110 from being rubbed, and is also beneficial to fix the glass panel 110 on other objects through the second protective film 130 .

In one of the embodiments, before S130, the step of performing a general full inspection on the glass panel 110 is further included.

Please also refer to FIG. 3 . In S140 , the glass panel 110 provided with the second protective film 130 is fixed on the separator 140 , so that the second protective film 130 is located between the separator 140 and the glass panel 110 , and the glass panel is The orthographic projection of 110 on the separator 140 falls within the separator 140 , wherein the area of the second protective film 130 is smaller than or equal to the area of the separator 140 .

The glass panel 110 is fixed on the partition 140 by the second protective film 130 , which further avoids friction on the edge of the glass panel 110 and ensures the thinning effect of the surface to be thinned 112 .

In one embodiment, the separator 140 is an acid-resistant plate. Further, the separator 140 is a PCV (Polyvinylchloride, polyvinyl chloride) board.

In one embodiment, in the step of fixing the glass panel 110 to the spacer 140 , the orthographic projection of the second protective film 130 on the spacer 140 falls on the spacer. Further, the method of fixing the glass panel 110 on the separator 140 is sticking. In the illustrated embodiment, a high temperature adhesive tape 150 is used to stick the position on the second protective film 130 not in contact with the first protective film 110 and the position on the separator 140 not in contact with the second protective film 130 . This arrangement can not only ensure the thinning area of the glass panel, but also firmly fix the glass panel on the partition, so as to ensure the subsequent thinning effect.

It should be noted that, one glass panel 110 provided with the second protective film 130 may be fixed on the partition 140, or a plurality of glass panels 110 provided with the second protective film 130 may be fixed on one partition 140, The glass panels 110 may also be provided on both sides of the same partition 140 . When a plurality of glass panels 110 provided with the second protective film 130 are fixed on a partition 140, the plurality of glass panels 110 are arranged at intervals.

S150 , performing a thinning process on the glass panel 110 fixed on the separator 140 to obtain a thinned glass panel.

Specifically, the spacer 140 on which the glass panel 110 is fixed is placed in an etching basket to perform a thinning process on the surface to be thinned 112 to obtain a thinned glass panel.

By arranging the first protective film 120, the second protective film 130 and the partition plate 140, it is possible to avoid directly placing the glass panel 110 in the etching basket for etching, to avoid damage to the edge of the glass panel 110, and to ensure the thinning of the glass panel. The thinning effect improves the yield of thinned glass panels.

In one embodiment, S150 includes the following steps S151-S152:

S151. Pre-etch the glass panel 110 fixed on the separator 140 by using a first etching solution, where the first etching solution includes H ₂ SO ₄ of 1.40g/L˜1.60g/L and 1.12g/L˜1.14g/L HF.

In one of the embodiments, the first etching solution further includes an active agent. The active agent is selected from phosphate with a mass percentage of 5% to 15%, polydiethanol with a mass percentage of 5% to 10%, phosphoric acid with a mass percentage of 5% to 15%, and a mass percentage of 5% to 15%. It is 0.2% to 0.4% of sodium lauryl sulfate, 0.2% to 0.4% by mass of OP12 (polyoxyethylene ether-12), and 0.8% to 1.2% by mass of PAM (polypropylene). amide) and at least one of EDTA with a mass percentage content of 0.8% to 1.2%. Among them, the phosphate is sodium phosphate. It should be noted that the phosphate is not limited to sodium phosphate, and may be other phosphates, for example, potassium phosphate.

In one embodiment, the spacer 140 with the glass panel 110 fixed thereon is put into an etching basket, and the glass panel 110 is soaked with the first etching solution. It should be noted that, a piece of the spacer 140 fixed with the glass panel 110 can be put into the etching basket for pre-etching, or multiple pieces of the spacer 140 with the glass panel 110 fixed can be put into the etching basket and pre-etched at the same time.

In one embodiment, the pre-etching time is 20 min to 60 min. The pre-etching temperature is 24°C to 32°C.

S152 , etching the pre-etched glass panel 110 with a second etching solution to obtain a thinned glass panel, where the second etching solution includes 1.05 g/L to 1.06 g/L of HF.

Specifically, the pre-etched separator 140 is placed in an etching basket, and the glass panel 110 is soaked with a second etching solution to perform etching treatment on the pre-etched glass panel 110 . It should be noted that, a piece of the spacer 140 fixed with the glass panel 110 may be put into the etching basket for etching, or multiple pieces of the spacer 140 with the glass panel 110 fixed may be put into the etching basket for simultaneous etching.

In one embodiment, the second etching solution further includes a corrosion inhibitor with a mass percentage of 2% to 4%, H ₂ SO ₄ with a volume percentage of 14% to 16%, and a mass percentage of 0.8% % to 1.2% of at least one of EDTA. Wherein, the corrosion inhibitor is an imidazoline corrosion inhibitor.

In one embodiment, the etching time is 100min˜200min. The etching temperature is 30°C to 40°C.

In one embodiment, the thickness of the thinned glass panel ranges from 0.06 mm to 0.5 mm.

In one embodiment, the pre-etched glass panel 110 is subjected to multiple etching processes using the second etching solution. It should be noted that multiple etchings can be performed to achieve the desired thinning thickness. Optionally, the number of etching times is three.

In one embodiment, after the step of etching the pre-etched glass panel 110 with the second etchant, the step of removing the separator 140 , the first protective film 120 and the second protective film 130 is further included. Specifically, the separator 140 is taken out, the high temperature adhesive tape 150, the first protective film 120 and the second protective film 130 are torn off, and then the thinned glass panel is taken out with the help of a white card. More specifically, the second protective film 130 and the first protective film 120 were peeled off at 70° C. using a heated adsorption stage. It should be noted that if the 150 strips of high temperature adhesive tape are not torn off together when the protective film is torn off, the adhesive strips should be removed after tearing the film to ensure that no adhesive strips remain.

In one embodiment, after S140 and before S150, cleaning the glass panel 110 fixed to the partition plate 140 is further included. Specifically, the to-be-thinned surface 112 of the glass panel 110 is wiped with alcohol.

The above-mentioned preparation method of the thinned glass panel is by disposing the first protective film 120 on the side of the glass panel 110 away from the surface to be thinned 112 , and making the orthographic projection of the glass panel 110 on the first protective film 120 fall on the first protective film 110 In order to protect the position on the glass panel 110 that does not need to be thinned, and further, by disposing the second protective film 130 on the side of the first protective film 120 away from the glass panel 110, the area of the glass panel 110 is smaller than the second protective film 130. The area of the film 130 can further protect the position on the thinned glass panel that does not need to be thinned by the second protective film 130, and the glass panel 110 provided with the second protective film 130 is fixed on the partition 140, so that the second The protective film 130 is located between the separator 140 and the glass panel 110, and the orthographic projection of the glass panel 110 on the separator 140 falls in the separator 140, and the area of the second protective film 130 is smaller than or equal to the area of the separator 110, The glass panel 110 can be fixed on the partition plate 140 through the second protective film 130, further avoiding friction on the edge of the glass panel 110, ensuring the edge effect of the glass panel 110, improving the yield rate after thinning, and ensuring the surface to be thinned The thinning effect of 112 is obtained, and a thinned glass panel with a high yield rate is prepared. It has been verified by experiments that the thickness of the thinned glass panel obtained by the above-mentioned preparation method of the thinned glass panel is 0.06 mm to 0.5 mm, and the yield rate is 99.0% to 99.9%.

Since the thickness required for the terminal is thinner, the thickness of the glass panel is required to be thinner, and the difficulty of the thinning process is greater. When the thinned glass panel is thinned to the extreme, the yield rate is low and it is easy to be broken. The thinned glass panel obtained by the above-mentioned preparation method of the thinned glass panel has a good edge effect, avoids the problems of edge jaggedness, gaps, bulges, liquid leakage, and acid leakage that are prone to occur in the conventional method, is not easy to be broken, and has a high yield. , which is beneficial to ensure the smooth progress of subsequent processes, and the separator 140 can be recycled to save production costs.

Generally, when the glass is thinned, the glass panel 110 is directly placed in the etching basket and entered into the etching machine for etching. Since the glass panel 110 is in direct contact with the rack in the basket, the edge of the glass panel 110 is easily rubbed. Falling off is not conducive to the reaction between the glass panel 110 and the etching solution, and only 24 glass panels 110 can be thinned at a time. In the above method for preparing a thinned glass panel, by fixing the glass panel 110 on the partition plate 140, it can avoid friction on the edge of the glass panel 110, ensure the thinning effect of the glass panel 110, and can pass multiple glass panels. The 110 is attached to one or both sides of the partition 140, so that 288 or more glass panels 110 can be thinned in one basket at the same time, and the thinning capacity is high.

The display device of one embodiment includes the thinned glass panel obtained by the method for producing a thinned glass panel of the above-mentioned embodiment.

In one of the embodiments, the display device is a liquid crystal display. It should be noted that the display device is not limited to a liquid crystal display, but can also be other display devices, such as 3D glass.

The above-mentioned display device has the thinned glass panel obtained by the preparation method of the thinned glass panel in the above-mentioned embodiment. Since the above-mentioned thinned glass panel has a good thinning effect and a high yield, the thickness of the display device can be reduced, and the display device has Better display performance.

The following are specific examples:

Unless otherwise specified, in the following embodiments, the separator is a PVC board. The acid-resistant film is the acid-resistant film of Shuocheng Company. The UV dissociation membrane is the UV dissociation membrane of Nanya Company.

Example 1

The preparation process of the thinned glass panel of this embodiment is as follows:

(1) Take 10 glass panels with a thinned surface. The glass panel is a Corning glass panel, and the thickness of the glass panel is 0.5 mm.

(2) Paste the first protective film on the side of the glass panel away from the thinned surface, and make the orthographic projection of the glass panel on the first protective film fall in the first protective film. The first protective film is an acid-resistant film.

(3) Using UV glue to dispense glue to the edge of the glass panel pasted with the first protective film, the dispensing pressure is 0.6MPa, and the height of the glue is 0.6mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 340nm. The curing time is 80s.

(4) Paste the second protective film on the side of the first protective film away from the glass panel, and make the orthographic projection of the glass panel on the second protective film fall in the second protective film. The distance between the edge of the orthographic projection of the glass panel on the second protective film and the edge of the second protective film is 4 mm. The second protective film is an acid-resistant film. The edge of the glass panel pasted with the second protective film is dispensed with UV glue, the dispensing pressure is 0.6MPa, and the height of the glue is 0.6mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 340nm. The curing time is 80s.

(5) Carry out routine full inspection on the glass panel processed in step (4). Use high temperature adhesive tape to stick the position on the second protective film that is not in contact with the first protective film and the position on the partition that is not in contact with the second protective film, so that the glass panel provided with the second protective film is fixed on the partition, The second protective film is located between the separator and the glass panel, and the orthographic projection of the glass panel on the separator falls in the separator, and the area of the second protective film is less than or equal to that of the separator. All four glass panels provided with the second protective film are fixed on one partition. The spacing between adjacent glass panels is 20mm.

(6) Use alcohol to wipe the thinned surface of the glass panel fixed on the partition. Put the partition with the glass panel fixed into the etching basket, and soak the glass panel with the first etching solution. The first etching solution included 1.40 g/L of H ₂ SO ₄ and 1.12 g/L of HF. The soaking time is 40min. The soaking temperature was 32°C.

(7) Put the pre-etched separator into the etching basket, and use the second etching solution to soak the glass panel. The second etching solution was an aqueous solution of 1.06 g/L of HF. The soaking time is 200min. The soaking temperature was 30°C.

(8) removing the separator, the high temperature adhesive tape, the first protective film and the second protective film to obtain a thinned glass panel.

Example 2

The preparation process of the thinned glass panel of this embodiment is as follows:

(1) Take 10 glass panels with a thinned surface. The glass panel is a Corning glass panel, and the thickness of the glass panel is 0.5 mm.

(2) Paste the first protective film on the side of the glass panel away from the thinned surface, and make the orthographic projection of the glass panel on the first protective film fall in the first protective film. The first protective film is a UV dissociation film.

(3) Paste the second protective film on the side of the first protective film away from the glass panel, and make the orthographic projection of the glass panel on the second protective film fall in the second protective film. The distance between the edge of the orthographic projection of the glass panel on the second protective film and the edge of the second protective film is 15 mm. The second protective film is a UV dissociation film.

(4) Routine full inspection is performed on the glass panel processed in step (3). Use high-temperature adhesive tape to stick the position on the second protective film that is not in contact with the first protective film and the position on the partition that is not in contact with the second protective film, so that the glass panel provided with the second protective film is fixed on the partition. The second protective film is located between the separator and the glass panel, and the orthographic projection of the glass panel on the separator falls in the separator, and the area of the second protective film is less than or equal to that of the separator. All four glass panels provided with the second protective film are fixed on one partition. The spacing between adjacent glass panels is 20mm.

(5) Use alcohol to wipe the thinned surface of the glass panel fixed on the partition. Put the partition with the glass panel fixed into the etching basket, and soak the glass panel with the first etching solution. The first etching solution included 1.60 g/L of H ₂ SO ₄ and 1.14 g/L of HF. The soaking time is 60min. The soaking temperature was 24°C.

(6) Put the pre-etched separator into the etching basket, and use the second etching solution to soak the glass panel. The second etching solution was an aqueous solution of 1.05 g/L of HF. The soaking time is 100min. The soaking temperature was 40°C.

(7) removing the separator, the high temperature adhesive tape, the first protective film and the second protective film to obtain a thinned glass panel.

Example 3

The preparation process of the thinned glass panel of this embodiment is as follows:

(1) Take 10 glass panels with a thinned surface. The glass panel is a Corning glass panel, and the thickness of the glass panel is 0.5 mm.

(2) Paste the first protective film on the side of the glass panel away from the thinned surface, and make the orthographic projection of the glass panel on the first protective film fall in the first protective film. The first protective film is an acid-resistant film.

(3) UV glue is used to dispense glue on the edge of the glass panel pasted with the first protective film, the dispensing pressure is 0.4MPa, and the height of the glue is 0.5mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 368nm. The curing time is 100s.

(4) Paste the second protective film on the side of the first protective film away from the glass panel, and make the orthographic projection of the glass panel on the second protective film fall in the second protective film. The distance between the edge of the orthographic projection of the glass panel on the second protective film and the edge of the second protective film is 10 mm. The second protective film is an acid-resistant film. The edge of the glass panel pasted with the second protective film is dispensed with UV glue, the dispensing pressure is 0.4MPa, and the height of the glue is 0.5mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 368nm. The curing time is 100s.

(5) Carry out routine full inspection on the glass panel processed in step (4). Use high-temperature adhesive tape to stick the position on the second protective film that is not in contact with the first protective film and the position on the partition that is not in contact with the second protective film, so that the glass panel provided with the second protective film is fixed on the partition. The second protective film is located between the separator and the glass panel, and the orthographic projection of the glass panel on the separator falls in the separator, and the area of the second protective film is less than or equal to that of the separator. All four glass panels provided with the second protective film are fixed on one partition. The spacing between adjacent glass panels is 20mm.

(6) Use alcohol to wipe the thinned surface of the glass panel fixed on the partition. Put the partition with the glass panel fixed into the etching basket, and soak the glass panel with the first etching solution. The first etching solution included 1.50 g/L of H ₂ SO ₄ and 1.13 g/L of HF. The soaking time is 40min. The soaking temperature was 28°C.

(7) Put the pre-etched separator into the etching basket, and use the second etching solution to soak the glass panel. The second etching solution was an aqueous solution of 1.05 g/L of HF. The soaking time was 130 min. The soaking temperature was 35°C.

(8) removing the separator, the high temperature adhesive tape, the first protective film and the second protective film to obtain a thinned glass panel.

Example 4

The preparation process of the thinned glass panel in this embodiment is roughly the same as that in Embodiment 1, the difference is that the first etching solution also includes sodium phosphate with a mass percentage of 5%, and polydimethacrylate with a mass percentage of 5%. Ethanol, phosphoric acid with a mass percentage of 5%～, sodium lauryl sulfate with a mass percentage of 0.2%, OP12 with a mass percentage of 0.2%, PAM with a mass percentage of 0.8%, and a mass percentage of 0.8% The content of EDTA is 0.8%. Among them, the phosphate is sodium phosphate. The second etching solution further includes a corrosion inhibitor with a content of 2% by mass, H ₂ SO ₄ with a content of 14% by volume and EDTA with a content of 0.8% by mass. Wherein, the corrosion inhibitor is an imidazoline corrosion inhibitor.

Example 5

The preparation process of the thinned glass panel in this embodiment is roughly the same as that in Embodiment 2, the difference is that the first etching solution further includes 15% by mass phosphate and 10% by mass polydicarbonate Ethanol, 15% by mass phosphoric acid, 0.4% by mass sodium lauryl sulfate, 0.4% by mass OP12, 1.2% by mass PAM and 1.2% EDTA. Among them, the phosphate is potassium phosphate. The second etching solution further includes a corrosion inhibitor with a content of 4% by mass, H ₂ SO ₄ with a content of 16% by volume and EDTA with a content of 1.2% by mass. Wherein, the corrosion inhibitor is an imidazoline corrosion inhibitor.

Example 6

The preparation process of the thinned glass panel in this embodiment is roughly the same as that in Embodiment 3, the difference is that the first etching solution further includes phosphate with a mass percentage of 10%, and polydimethacrylate with a mass percentage of 7.5%. Ethanol, 10% by mass phosphoric acid, 0.3% by mass sodium lauryl sulfate, 0.3% by mass OP12, 1% by mass PAM and 1% EDTA. Among them, the phosphate is potassium phosphate. The second etching solution further includes a corrosion inhibitor with a content of 3% by mass, H ₂ SO ₄ with a content of 15% by volume and EDTA with a content of 1% by mass. Wherein, the corrosion inhibitor is an imidazoline corrosion inhibitor.

Example 7

The preparation process of the thinned glass panel of this embodiment is as follows:

(1) Take 10 glass panels with a thinned surface. The glass panel is a Corning glass panel, and the thickness of the glass panel is 0.5 mm.

(2) Paste the first protective film on the side of the glass panel away from the thinned surface, and make the orthographic projection of the glass panel on the first protective film fall in the first protective film. The first protective film is an acid-resistant film.

(3) UV glue is used to dispense glue on the edge of the glass panel pasted with the first protective film, the dispensing pressure is 0.4MPa, and the height of the glue is 0.5mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 368nm. The curing time is 100s.

(4) Routine full inspection is performed on the glass panel processed in step (3). Use high temperature adhesive tape to stick the first protective film on the separator, so that the glass panel provided with the first protective film is fixed on the separator, the first protective film is located between the separator and the glass panel, and the first protective film is The orthographic projection of the protective film on the separator falls in the separator, and the area of the first protective film is smaller than or equal to the area of the separator. All four glass panels provided with the first protective film are fixed on one partition. The spacing between adjacent glass panels is 20mm.

(5) Use alcohol to wipe the thinned surface of the glass panel fixed on the partition. Put the partition with the glass panel fixed into the etching basket, and soak the glass panel with the first etching solution. The first etching solution included 1.50 g/L of H ₂ SO ₄ and 1.13 g/L of HF. The soaking time is 40min. The soaking temperature was 28°C.

(6) Put the pre-etched separator into the etching basket, and use the second etching solution to soak the glass panel. The second etching solution was an aqueous solution of 1.05 g/L of HF. The soaking time was 130 min. The soaking temperature was 35°C.

(7) The separator, the high-temperature adhesive tape, and the first protective film are removed to obtain a thinned glass panel.

Example 8

The preparation process of the thinned glass panel of this embodiment is as follows:

(1) Take 10 glass panels with a thinned surface. The glass panel is a Corning glass panel, and the thickness of the glass panel is 0.5 mm.

(2) Paste the first protective film on the side of the glass panel away from the thinned surface, and make the orthographic projection of the glass panel on the first protective film fall in the first protective film. The first protective film is an acid-resistant film.

(3) Paste the second protective film on the side of the first protective film away from the glass panel, and make the orthographic projection of the glass panel on the second protective film fall in the second protective film. The distance between the edge of the orthographic projection of the glass panel on the second protective film and the edge of the second protective film is 10 mm. The second protective film is an acid-resistant film.

(4) Routine full inspection is performed on the glass panel processed in step (3). The edge of the second protective film and the edge of the partition are pasted with high temperature adhesive tape, so that the glass panel provided with the second protective film is fixed on the partition, and the second protective film is located between the partition and the glass panel, and The orthographic projection of the glass panel on the separator falls within the separator, and the area of the second protective film is less than or equal to that of the separator. All four glass panels provided with the second protective film are fixed on one partition. The spacing between adjacent glass panels is 20mm.

(5) Use alcohol to wipe the thinned surface of the glass panel fixed on the partition. Put the partition with the glass panel fixed into the etching basket, and soak the glass panel with the first etching solution. The first etching solution included 1.50 g/L of H ₂ SO ₄ and 1.13 g/L of HF. The soaking time is 40min. The soaking temperature was 28°C.

(6) Put the pre-etched separator into the etching basket, and use the second etching solution to soak the glass panel. The second etching solution was an aqueous solution of 1.05 g/L of HF. The soaking time is 100min. The soaking temperature was 35°C.

(7) removing the separator, the high temperature adhesive tape, the first protective film and the second protective film to obtain a thinned glass panel.

Example 9

The preparation process of the thinned glass panel of this embodiment is as follows:

(1) Take 10 glass panels with a thinned surface. The glass panel is a Corning glass panel, and the thickness of the glass panel is 0.5 mm.

(2) Paste the first protective film on the side of the glass panel away from the thinned surface, and make the orthographic projection of the glass panel on the first protective film fall in the first protective film. The first protective film is an acid-resistant film.

(3) UV glue is used to dispense glue on the edge of the glass panel pasted with the first protective film, the dispensing pressure is 0.4MPa, and the height of the glue is 0.5mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 368nm. The curing time is 100s.

(4) Paste the second protective film on the side of the first protective film away from the glass panel, and make the orthographic projection of the glass panel on the second protective film fall in the second protective film. The distance between the edge of the orthographic projection of the glass panel on the second protective film and the edge of the second protective film is 10 mm. The second protective film is an acid-resistant film. The edge of the glass panel pasted with the second protective film is dispensed with UV glue, the dispensing pressure is 0.4MPa, and the height of the glue is 0.5mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 368nm. The curing time is 100s.

(5) Carry out routine full inspection on the glass panel processed in step (4), and use high-temperature adhesive tape to stick the position on the second protective film that is not in contact with the first protective film and the position on the partition that is not in contact with the second protective film, so that The glass panel provided with the second protective film is fixed on the clapboard, the second protective film is located between the clapboard and the glass panel, and the orthographic projection of the glass panel on the clapboard falls in the clapboard, the second The area of the protective film is less than or equal to that of the separator. All four glass panels provided with the second protective film are fixed on one partition. The spacing between adjacent glass panels is 20mm.

(6) Use alcohol to wipe the thinned surface of the glass panel fixed on the partition. Put the partition with the glass panel fixed into the etching basket, and soak the glass panel with the first etching solution. The first etching solution included 1.13 g/L of HF. The soaking time is 40min. The soaking temperature was 28°C.

(7) Put the pre-etched separator into the etching basket, and use the second etching solution to soak the glass panel. The second etching solution was an aqueous solution of 1.05 g/L of HF. The soaking time was 130 min. The soaking temperature was 35°C.

(8) removing the separator, the high temperature adhesive tape, the first protective film and the second protective film to obtain a thinned glass panel.

Example 10

The preparation process of the thinned glass panel of this embodiment is as follows:

(1) Take 10 glass panels with a thinned surface. The glass panel is a Corning glass panel, and the thickness of the glass panel is 0.5 mm.

(2) Paste the first protective film on the side of the glass panel away from the thinned surface, and make the orthographic projection of the glass panel on the first protective film fall in the first protective film. The first protective film is an acid-resistant film.

(3) UV glue is used to dispense glue on the edge of the glass panel pasted with the first protective film, the dispensing pressure is 0.4MPa, and the height of the glue is 0.5mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 368nm. The curing time is 100s.

(4) Paste the second protective film on the side of the first protective film away from the glass panel, and make the orthographic projection of the glass panel on the second protective film fall in the second protective film. The distance between the edge of the orthographic projection of the glass panel on the second protective film and the edge of the second protective film is 10 mm. The second protective film is an acid-resistant film. The edge of the glass panel pasted with the second protective film is dispensed with UV glue, the dispensing pressure is 0.4MPa, and the height of the glue is 0.5mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 368nm. The curing time is 100s.

(5) Carry out routine full inspection on the glass panel processed in step (4), and use high-temperature adhesive tape to paste the position on the second protective film that is not in contact with the first protective film and the position on the partition that is not in contact with the second protective film, so that The glass panel provided with the second protective film is fixed on the partition, the second protective film is located between the partition and the glass panel, and the orthographic projection of the glass panel on the partition falls in the partition, the second The area of the protective film is less than or equal to that of the separator. All four glass panels provided with the second protective film are fixed on one partition. The spacing between adjacent glass panels is 20mm.

(6) Use alcohol to wipe the thinned surface of the glass panel fixed on the partition. Put the partition with the glass panel fixed into the etching basket, and soak the glass panel with the first etching solution. The first etching solution included 1.50 g/L of H ₂ SO ₄ and 1.13 g/L of HF. The soaking time is 40min. The soaking temperature was 28°C.

(7) Put the pre-etched separator into the etching basket, and use the second etching solution to soak the glass panel. The second etching solution is an aqueous solution of 1.05 g/L HNO ₃ . The soaking time was 130 min. The soaking temperature was 35°C.

(8) removing the separator, the high temperature adhesive tape, the first protective film and the second protective film to obtain a thinned glass panel.

Example 11

The preparation process of the thinned glass panel of this embodiment is as follows:

(1) Take 10 glass panels with a thinned surface. The glass panel is a Corning glass panel, and the thickness of the glass panel is 0.5 mm.

(2) Paste the first protective film on the side of the glass panel away from the thinned surface, and make the orthographic projection of the glass panel on the first protective film fall in the first protective film. The first protective film is an acid-resistant film.

(3) UV glue is used to dispense glue on the edge of the glass panel pasted with the first protective film, the dispensing pressure is 0.4MPa, and the height of the glue is 0.5mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 368nm. The curing time is 100s.

(4) Paste the second protective film on the side of the first protective film away from the glass panel, and make the orthographic projection of the glass panel on the second protective film fall in the second protective film. The distance between the edge of the orthographic projection of the glass panel on the second protective film and the edge of the second protective film is 10 mm. The second protective film is an acid-resistant film. The edge of the glass panel pasted with the second protective film is dispensed with UV glue, the dispensing pressure is 0.4MPa, and the height of the glue is 0.5mm. UV-curing treatment of glued glass panels. The wavelength of ultraviolet light is 368nm. The curing time is 100s.

(5) Carry out routine full inspection on the glass panel processed in step (4). The thinned surface of the glass panel treated in step (4) is wiped with alcohol. Put the glass panel directly into the etching basket, and soak the glass panel with the first etching solution. The first etching solution included 1.50 g/L of H ₂ SO ₄ and 1.13 g/L of HF. The soaking time is 40min. The soaking temperature was 28°C.

(6) Put the pre-etched glass panel into the etching basket, and use the second etching solution to soak the glass panel. The second etching solution was an aqueous solution of 1.05 g/L of HF. The soaking time is 100min. The soaking temperature was 35°C.

(7) The first protective film and the second protective film are removed to obtain a thinned glass panel.

test:

The edge effect, the leakage rate, the apparent yield, the thickness, and the thickness difference between the glass panel and the thinned glass panel of the thinned glass panels of Examples 1 to 11 were measured. The measurement results are shown in Table 1. Table 1 shows the edge effect, liquid leakage rate, apparent yield, and thickness difference between the glass panel and the thinned glass panel of the thinned glass panels of Examples 1 to 11.

Specifically, using a magnifying glass and observing the edge effect of the thinned glass panel with the naked eye;

Use a magnifying glass to observe whether the thinned glass panel leaks with the naked eye, and calculate the leakage rate;

Use a magnifying glass and a film ruler to measure the apparent yield of the thinned glass panel;

Use a micrometer to measure the thickness of the thinned glass panel;

A micrometer was used to measure the thickness difference (ie, thickness difference) between the thinned glass panel and the thinned glass panel.

Table 1

As can be seen from Table 1, the edges of the thinned glass panels obtained in Examples 1 to 6 are basically free of serrations, notches and protrusions, and no liquid leakage, the apparent yield is 99.11% to 99.9%, and the thickness can reach 0.06mm to 0.06mm 0.2 mm, and the thickness difference before and after the thinning of the glass panel can reach 0.3 mm to 0.44 mm through the preparation method of the thinned glass panel in Examples 1 to 6. The effect is high, and the thinned glass panel with high yield rate, high liquid leakage rate and good edge effect can be prepared.

Among them, the leakage rate of the thinned glass panel of Example 7 is 20%, which is significantly higher than that of Example 3, which shows that in the preparation method of the thinned glass panel of the above embodiment, it is beneficial to ensure the thinning of the glass panel by two times of film coating. the quality of. The edge of the thinned glass panel of Example 8 is severely jagged and has notches, the leakage rate is 50%, and the thickness is 0.2 mm, which is obviously worse than that of the thinned glass panel of Example 3. Gluing and curing can not only improve the edge effect of the thinned glass panel, ensure the quality of the thinned glass panel, but also improve the thinning effect.

To sum up, in the method for preparing a thinned glass panel in the above-mentioned embodiments, the thinning effect is good, and a thinned glass panel with a high yield rate, a high liquid leakage rate and a good edge effect can be prepared, which can be applied to A display device with better performance is prepared.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are more specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (5)

1. A method for preparing a thinned glass panel, comprising the steps of: A glass panel is provided, the glass panel has a surface to be thinned; the thickness of the glass panel is 0.5mm; A first protective film is arranged on the side of the glass panel away from the surface to be thinned, and the orthographic projection of the glass panel on the first protective film falls in the first protective film; the first protective film A protective film is an acid-resistant film; The edge of the glass panel provided with the first protective film is dispensed with UV glue, the pressure of the dispensing treatment is 0.4MPa, and the height of the glue is 0.5mm; The glass panel is cured by ultraviolet light, the wavelength of the ultraviolet light is 368nm, and the curing time is 100s; A second protective film is arranged on the side of the first protective film away from the glass panel, and the orthographic projection of the glass panel on the second protective film falls in the second protective film; The distance between the edge of the orthographic projection on the second protective film and the edge of the second protective film is 10mm; the second protective film is an acid-resistant film; The edge of the glass panel provided with the second protective film is dispensed with UV glue; the dispensing pressure is 0.4MPa, and the glue height is 0.5mm; the glass panel after the dispensing treatment is cured by UV light treatment, the wavelength of the ultraviolet light is 368nm, and the curing time is 100s; The glass panel is fixed on the partition, the second protective film is located between the partition and the glass panel, and the orthographic projection of the glass panel on the partition falls on the In the separator, wherein the area of the second protective film is less than or equal to the area of the separator; and thinning the glass panel fixed on the partition to obtain a thinned glass panel; The steps of performing a thinning process on the glass panel fixed to the partition to obtain the thinned glass panel include: The glass panel fixed on the separator is pre-etched with a first etching solution, the first etching solution includes 1.50g/L H ₂ SO ₄ , 1.13g/L HF, and the mass percentage is 10% potassium phosphate, 7.5% by mass polyethylene glycol, 10% by mass phosphoric acid, 0.3% by mass sodium lauryl sulfate, 0.3% by mass % of OP12, 1% by mass of PAM and 1% by mass of EDTA; the pre-etching time is 40min, and the temperature is 28°C; and The pre-etched glass panel is etched with a second etching solution to obtain the thinned glass panel. The second etching solution includes 1.05 g/L HF and 3 wt% imidazoline Corrosion inhibitor, H ₂ SO ₄ with a volume percentage of 15%, and EDTA with a mass percentage of 1%; the etching treatment time is 130 min, and the temperature is 35°C. 2 . The method for preparing a thinned glass panel according to claim 1 , wherein the separator is an acid-resistant plate. 3 . 3 . The method for preparing a thinned glass panel according to claim 1 , wherein in the step of fixing the glass panel on the separator, the second protective film is on the separator. 4 . The orthographic projection falls on the baffle. 4 . A thinned glass panel, characterized in that, it is prepared by the method for preparing a thinned glass panel according to any one of claims 1 to 3 . 5. A display device, comprising the thinned glass panel of claim 4.

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