Screen printing method suitable for ultrathin flexible glass

Abstract

The invention discloses a silk-screen printing method suitable for ultrathin flexible glass. The silk-screen printing method comprises the steps that S1, a foldable glass cover plate is fixed to a silk-screen printing bottom plate jig; s2, printing ink needing to be printed is prepared, a corresponding screen printing plate is prepared, and the screen printing plate is fixed to a screen printing machine; s3, printing is conducted; and S4, baking. According to the screen printing method suitable for the ultra-thin flexible glass, the influence of PET screen printing is avoided, a foldable glass cover plate is directly adopted for surface screen printing, a product obtained after screen printing is directly used as a Cover to be integrally attached to a module, OCA and PET are omitted, the product display is clearer, the crease problem is further reduced, the bending performance is synchronously improved, and the production cost is reduced. Therefore, the bending angle of the product is smaller, the product is more attractive in use, and the possibility risk of breakage is smaller.

Description

Technical Field

[0001] The present invention belongs to the technical field of ultra-thin flexible glass, and in particular, relates to a screen printing method suitable for ultra-thin flexible glass. Background Art

[0002] With the upgrading of electronic products, glass has been widely used in the electronics industry. The market has increasingly thinned the thickness of the protective glass for the touch screen glass cover. Ultra-thin glass has become one of the important development trends of glass. Ultra-thin glass cover has attracted more and more attention from listed companies in the electronic display industry, and is mainly used in folding mobile phones, folding laptops and various wearable electronic devices. Ultra-thin glass (Ultra-Thin Glass, foldable glass cover) refers to glass with a thickness of less than 100μm and is flexible. Foldable glass cover is widely used in various electronic industries due to its high transparency, stability and impact resistance. Its easy-to-bend characteristics have marked a major milestone for the folding display industry, becoming an important player in the field of foldable flexible cover after CPI cover.

[0003] With the diversified demand for consumer products, the foldable glass cover will lose some impact strength due to its thin plate thickness; therefore, in the actual application process, the whole machine is basically assembled and bonded in the form of a bonded cover. The advanced stacking solutions in the current screen factory are: CPI (colorless polyimide) + OCA (Optically Clear) + PET (polyethylene terephthalate) solution, PET + OCA + foldable glass cover solution, CPI + OCA + foldable glass cover solution, etc., but no matter which solution involves the use of OCA, in the display module industry, the BM area (black matrix (anti-light leakage) area) will be screen-printed on the edge area of ​​PET / CPI during the use of the module, and OCA will be used for bonding, but the combination of OCA and PET or CPI will cause creep for a long time, resulting in obvious creases, which is not conducive to the perception of personnel. In addition, the bending ability of the product after bonding will also be lost compared to the single foldable glass cover, resulting in the need for a more precise hinge design during module manufacturing.

[0004] When the foldable glass cover is currently used for processing, it must be stacked in OCA, CPI, PET, etc. PET is mainly used to screen print the BM area to ensure the edge black frame of the module, and OCA is used for bonding to connect the foldable glass cover and PET. This solution involves the bonding of OCA, which leads to poor creep performance of the product after bonding, and bending marks are prone to occur inside the back of the bend, while also reducing some bending performance. In addition, the foldable glass cover is too thin to control the quality of the silk-screened product. The thinner foldable glass cover is also prone to scratching and cracking the screen, making it impossible to silk-screen the foldable glass cover. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a screen printing method suitable for ultra-thin flexible glass, the purpose of which is to improve the display clarity of the ultra-thin flexible glass and reduce creases.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: a screen printing method applicable to ultra-thin flexible glass, comprising the steps of:

[0007] S1. Fix the foldable glass cover on the screen printing base jig;

[0008] S2, prepare the ink to be printed, prepare the corresponding screen, and fix the screen on the screen printing machine;

[0009] S3, printing;

[0010] S4. Baking.

[0011] The foldable glass cover plate is bonded to the screen printing base plate jig.

[0012] The foldable glass cover plate is bonded to the screen printing base plate jig via a removable double-sided high temperature resistant film material.

[0013] The thickness of the screen printing base plate jig is 0.1-5 mm.

[0014] In step S3, the product is aligned by using a CCD device.

[0015] The silk screen printing method applicable to ultra-thin flexible glass also includes the step: S5, separating the foldable glass cover plate from the silk screen printing base plate jig.

[0016] The screen printing method for ultra-thin flexible glass of the present invention avoids the influence of PET screen printing and directly adopts a foldable glass cover plate for surface screen printing. The product after screen printing is directly used as a Cover (laminated cover plate) to be laminated with the module as a whole, eliminating OCA and PET. The product display is clearer, the crease problem is further weakened, and the bending performance is improved at the same time, resulting in a smaller bending angle of the product, better appearance in use, and a smaller risk of breakage. DETAILED DESCRIPTION

[0017] The specific implementation methods of the present invention are further explained in detail below through the description of embodiments, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0018] The present invention provides a screen printing method suitable for ultra-thin flexible glass, comprising the following steps:

[0019] S1. Fix the foldable glass cover on the screen printing base jig;

[0020] S2, prepare the ink to be printed, prepare the corresponding screen, and fix the screen on the screen printing machine;

[0021] S3, printing;

[0022] S4, baking;

[0023] S5. Separate the foldable glass cover from the silk-screen base jig.

[0024] Specifically, in the above step S1, the foldable glass cover plate is bonded to the screen printing base plate jig to form a carrier.

[0025] Preferably, in the above step S1, the foldable glass cover plate is bonded to the screen printing base plate jig by a removable double-sided high temperature resistant film material.

[0026] In the above step S1, the thickness of the screen printing base plate jig is 0.1 to 5 mm. By replacing the screen printing base plate jigs of different thicknesses, the distance between the foldable glass cover plate and the screen can be changed, so that the screen printing thickness and screen printing quality of the surface pattern of the foldable glass cover plate can be easily controlled.

[0027] In the above step S3, the pasted foldable glass cover plate + silk screen printing base plate jig is used as a carrier for silk screen printing, and the surface of the foldable glass cover plate is printed by the screen. The ink thickness after silk screen printing is controlled by controlling the thickness of the silk screen printing base plate jig, the pressure, the scraping angle, the ink ratio, etc.

[0028] In the above step S3, the product is aligned by using the CCD device (semiconductor imaging device) of the screen printer to ensure the screen printing accuracy is OK, and the screen printing pattern is larger than the foldable glass cover pattern.

[0029] In the above step S4, after the screen printing is completed, the entire carrier is baked at high temperature to ensure that the ink is dry.

[0030] In the above step S5, after baking, the foldable glass cover plate and the base plate are peeled off. After peeling, the size and ink thickness of the foldable glass cover plate after silk screen printing can be tested. The silk screen pattern is not limited and can be customized according to requirements.

[0031] The above is an exemplary description of the present invention. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A screen printing method for ultra-thin flexible glass, characterized in that: Includes steps: S1. Fix the foldable glass cover on the screen printing base jig; S2, prepare the ink to be printed, prepare the corresponding screen, and fix the screen on the screen printing machine; S3, printing; S4. Baking.

2. The screen printing method for ultra-thin flexible glass according to claim 1, characterized in that: The foldable glass cover plate is bonded to the screen printing base plate jig.

3. The screen printing method for ultra-thin flexible glass according to claim 1, characterized in that: The foldable glass cover plate is bonded to the screen printing base plate fixture by a removable double-sided high temperature resistant film material.

4. The screen printing method for ultra-thin flexible glass according to any one of claims 1 to 3, characterized in that: The thickness of the screen printing base plate jig is 0.1-5 mm.

5. The screen printing method for ultra-thin flexible glass according to any one of claims 1 to 3, characterized in that: The thickness of the screen printing base plate fixture is 0.1 mm.

6. The screen printing method for ultra-thin flexible glass according to any one of claims 1 to 3, characterized in that: The thickness of the screen printing base plate fixture is 1 mm.

7. The screen printing method for ultra-thin flexible glass according to any one of claims 1 to 3, characterized in that: The thickness of the screen printing base plate fixture is 2 mm.

8. The screen printing method for ultra-thin flexible glass according to any one of claims 1 to 3, characterized in that: In step S3, the product is aligned by using a CCD device.

9. The screen printing method for ultra-thin flexible glass according to any one of claims 1 to 3, characterized in that: Also includes the steps: S5. Separate the foldable glass cover from the silk-screen base jig.