WO2019109216A1

WO2019109216A1 - Flexible base board and manufacturing method therefor

Info

Publication number: WO2019109216A1
Application number: PCT/CN2017/114480
Authority: WO
Inventors: 陈一鸣
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2017-12-04
Filing date: 2017-12-04
Publication date: 2019-06-13
Also published as: CN111357111A

Abstract

Disclosed in the present invention are a flexible base board and a manufacturing method therefor. The flexible base board comprises a flexible substrate, a functional layer disposed on one side of the flexible substrate, and a supporting layer disposed on one side of the flexible substrate back away from the functional layer. The supporting layer comprises multiple supporting ribs that are independent from each other and that are disposed in a spaced manner. In the present invention, multiple independent supporting ribs disposed in a spaced manner are fixedly disposed on the flexible substrate to achieve a supporting effect, thereby improving the bending capability and the bending service life of the whole flexible base board, and improving the flexible performance of the flexible base board.

Description

Flexible substrate and method of manufacturing same

Technical field

The invention belongs to the technical field of display, and relates to a flexible substrate and a manufacturing method thereof.

Background technique

With the development of display technology, display products are increasingly diversified and humanized. Among them, flexible display is an important development direction.

At present, in the preparation process of the existing flexible substrate, a rigid substrate is required, and then a flexible substrate is fixed on the rigid substrate, and then a functional layer is formed on the flexible substrate to form a flexible substrate; Cut it to remove it. After the flexible substrate is separated from the rigid substrate, it is generally required to adhere a support film on the flexible substrate, and the support film serves as a support for the flexible substrate to facilitate its transfer. However, in the prior art, the support film is attached to the flexible substrate by means of a full-surface film, and remains in the final flexible substrate, so that the flexible performance of the flexible substrate is lowered.

Therefore, it is necessary to provide a new flexible substrate to solve the above technical problems.

technical problem

In the prior art, the support film is attached to the flexible substrate by means of a full-surface film, and remains in the final flexible substrate, so that the flexible performance of the flexible substrate is lowered.

Technical solution

In order to solve the above technical problems, the present invention provides a novel flexible substrate capable of improving flexibility and a method of manufacturing the same.

The present invention provides a flexible substrate comprising a flexible substrate, a functional layer disposed on one side of the flexible substrate, and a support layer disposed on a side of the flexible substrate away from the functional layer, the support layer A plurality of support ribs that are independent of each other and spaced apart are included.

Preferably, the flexible substrate is bent to form a curved center line, and each two adjacent support ribs are symmetrically disposed about the bending center line.

Preferably, the distance between the two adjacent support ribs is greater than the radius of curvature of the flexible substrate when bent within the interval.

Preferably, the distance of the spacing is 1-4 mm greater than the radius of curvature.

Preferably, the support ribs are fixed to the flexible substrate by coating or printing.

Preferably, the support rib is made of a thermosetting organic material or a photosensitive resin material.

Preferably, the flexible substrate further includes a first protective layer removably attached to a side of the support layer away from the flexible substrate.

The invention also provides a manufacturing method of a flexible substrate, comprising:

S1, providing a flexible substrate and forming a functional layer on one side of the flexible substrate;

S2, forming a support layer on a side of the flexible substrate away from the functional layer; the support layer comprises a plurality of support ribs that are independent of each other and spaced apart.

Preferably, further comprising S3 forming a removable first protective layer on a side of the support layer remote from the flexible substrate.

Preferably, the step S2 comprises:

The support ribs are formed on a flexible substrate by coating or printing.

Beneficial effect

The invention has the beneficial effects that the invention realizes the supporting action by fixing a plurality of mutually independent and spaced supporting ribs on the flexible substrate, thereby improving the bending ability and the bending life of the entire flexible substrate, and improving the flexible substrate. Flexible performance.

DRAWINGS

1 is a schematic structural view of a flexible substrate provided by the present invention;

2 is a schematic structural view showing the first combination of the flexible substrate and the support layer of FIG. 1;

3 is a schematic structural view showing a second combination of the flexible substrate and the support layer of FIG. 1;

4 is a schematic structural view showing a third combination of the flexible substrate and the support layer of FIG. 1;

FIG. 5 is a flow chart of a method for fabricating a flexible substrate according to the present invention.

BEST MODE FOR CARRYING OUT 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.

Referring to FIG. 1, the present invention provides a flexible substrate 100 including a flexible substrate 101, a functional layer 102 disposed on one side of the flexible substrate 101, and a side disposed away from the functional layer 102 in the flexible substrate 101. The support layer 103 and the first protective layer 104 disposed on the side of the support layer 103 facing away from the flexible substrate 101. In this embodiment, the protective layer 104 may specifically be a protective film, and the protective film may be made of a polymer material, for example, a plastic material such as polyethylene terephthalate, and the rubber may pass through the glue. A sticky or the like is disposed on the side of the support layer 103 facing away from the flexible substrate 101. The first protective layer 104 is used to protect the flexible substrate 100 during deformation of the flexible substrate 100 from deformation or damage, and the first protective layer 104 can be separated from the support layer 103 away from the flexible liner after the transfer is completed. The bottom 101 is removed on one side and is not present in the final flexible substrate product. It can be understood that the first protective layer 104 may not be provided when the support layer 103 can provide sufficient protection and support.

Referring to FIG. 1 , in the embodiment, the functional layer 102 includes a thin film crystal layer 1021 , an OLED layer 1022 , a thin film encapsulation layer 1023 , and a second protective layer 1024 which are sequentially stacked on the flexible substrate 101 . The thin film crystal layer 1021 is a thin film transistor controlled by a switching circuit and a driving circuit, the OLED layer 1022 is used for light emission, and the thin film encapsulation layer 1023 and the second protective layer 1024 are used to protect the thin film crystal layer 1021 and the OLED layer 1022.

The flexible substrate 101 may be made of a flexible plastic material or a metal material such as stainless steel. The flexible substrate 101 is preferably made of a plastic material having excellent heat resistance such as polyvinyl ether phthalate, polyethylene naphthalene, polycarbonate, polyarylate, polyetherimide, polyethersulfone or Polyimide and so on.

The support layer 103 includes a plurality of support ribs 1031 that are independent of each other and spaced apart. The support ribs 1031 are preferably made of a material such as a thermosetting organic material or a photosensitive resin. The support layer 103 may be formed by coating a material such as a thermosetting organic material or a photosensitive resin on a surface of the flexible substrate 101 facing away from the functional layer 102, and then forming a support by heat curing or UV light curing. Tendon 1031. It can be understood that the support ribs 1031 can also be formed on the surface of the flexible substrate 101 by inkjet printing. The shape of each of the support ribs 1031 may be the same or different. Preferably, in the present embodiment, each of the support ribs 1031 has a rectangular block shape. Of course, in other embodiments, the support ribs 1031 may also be arranged in a square shape, an elongated shape, or the like. The width and thickness of the support ribs 1031 can be set according to actual needs, and the thickness is preferably set to 10-50 μm and the width is set to 2-20 mm. In this embodiment, the support function is achieved by fixing a plurality of mutually independent and spaced support ribs on the flexible substrate, thereby improving the bending ability and the bending life of the entire flexible substrate 100, and improving the flexibility of the flexible substrate. performance. In other embodiments, the support layer 103 further includes a support film coated between the adjacent support ribs 1031, the support film having a thickness smaller than the thickness of the support ribs 1031, thereby protecting the flexible substrate 100 from being prevented. Was scratched. The support film is made of the same material and process as the support ribs 1031.

Referring to Fig. 2, the hollow arrows in Fig. 2 indicate the bending direction of the flexible substrate 101. The support layer 103 includes two support ribs 1031 formed on the flexible substrate 101. A space D is formed between the two support ribs 1031. In this embodiment, the flexible substrate 101 is bent once, the bending point is located at the interval D, and the bending forms a bending center line L. The two supporting ribs 1031 are symmetrically disposed about the bending center line L, and the spacing D is The distance is larger than the radius of curvature when the flexible substrate 101 is bent, and preferably, the distance of the interval D is larger than the radius of curvature of the flexible substrate 101 by 1-4 mm. The support function is achieved by providing two independent support ribs 1031 on the flexible substrate, and there is a gap between the two, thereby improving the bending ability and the bending life of the entire flexible substrate, and improving the flexibility of the flexible substrate. .

Referring to Fig. 3, the hollow arrows in Fig. 3 indicate the bending direction of the flexible substrate 101. In the present embodiment, the support layer 103 includes three first support ribs 1031a, second support ribs 1031b, and third support ribs 1031c which are formed on the flexible substrate 101 and are disposed in parallel and spaced apart from each other. A first interval D1 is formed between the first support rib 1031a and the second support rib 1031b, and a second interval D2 is formed between the second support rib 1031b and the third support rib 1031c. In the present embodiment, the flexible substrate 101 is bent twice, and has two mutually parallel curved center lines L1 and L2, and the bending points are respectively located in the first interval D1 and the second interval D2. The first support ribs 1031a and the second support ribs 1031b are symmetrically disposed with respect to the bending center line L1; the second support ribs 1031b and the third support ribs 1031c are symmetrically disposed about the bending center line L2. The distance of the first interval D1 is greater than the radius of curvature of the flexible substrate 101 when bent in the first interval D1. Preferably, the distance of the first interval D1 is 1-4 mm larger than the radius of curvature of the flexible substrate 101. Preferably, the distance of the second interval D2 is greater than the radius of curvature of the flexible substrate 101 when bent in the second interval D2, and preferably, the distance of the second interval D2 is 1-4 mm larger than the radius of curvature of the flexible substrate 101. .

Referring to Fig. 4, the hollow arrows in Fig. 4 indicate the bending direction of the flexible substrate 101. The support layer 103 includes a plurality of mutually parallel and spaced apart support ribs 1031 formed on the flexible substrate 101, and a spacing D is formed between each two adjacent support ribs 1031, that is, a plurality of intervals are formed in the support layer 103. D. The flexible substrate 101 is bent a plurality of times, and a plurality of bending points are respectively distributed in the plurality of intervals, and the bending forms a corresponding bending center line. The support ribs 1031 located on both sides of each interval D are symmetrically disposed about their corresponding bending center lines. The distance of each of the intervals D is larger than the radius of curvature of the flexible substrate 101 when the bending occurs within the interval D. Preferably, the distance of the interval D is 1-4 mm larger than the radius of curvature of the flexible substrate 101.

It can be understood that the plurality of support ribs 1031 may not be disposed in parallel with each other. Since the plurality of support ribs 1031 are independent structures, the support ribs 1031 may be disposed at corresponding positions according to the actual design requirements of the flexible substrate 100. The support ribs 1031 are combined into different shapes and structures. For example, the support ribs 1031 may be disposed in a bezel area of the display panel, a display area or a non-display area of the display panel, and the like. Thereby, the flexibility of the flexible substrate application is improved, and the application range of the flexible substrate is expanded.

Referring to FIG. 5, the present invention also provides a method of fabricating a flexible substrate. Specifically, the following steps are included:

S1, a flexible substrate 101 is provided, which may be made of a flexible plastic material or a metal material such as stainless steel. The flexible substrate 101 is preferably made of a plastic material having excellent heat resistance such as polyvinyl ether phthalate, polyethylene naphthalene, polycarbonate, polyarylate, polyetherimide, polyethersulfone. , and polyimide and so on. A functional layer 102 is formed on one side of the flexible substrate 101, and the functional layer 102 is used to implement the display function of the flexible substrate 100.

S2, a support layer 103 is formed on a side of the flexible substrate 101 facing away from the functional layer 102, and the support layer 103 includes a plurality of support ribs 1031 that are independent of each other and spaced apart. The support ribs 1031 are preferably made of a thermosetting organic material or a photosensitive resin or the like, specifically, coated or printed on the surface of the flexible substrate 101. It is formed on the flexible substrate by the above-described coating or printing method instead of sticking, and generation of air bubbles can be avoided.

S3, a first protective layer 104 is formed on a side of the support layer 103 facing away from the flexible substrate 101. The first protective layer 104 may specifically be a protective film which is disposed on the side of the support layer 103 facing away from the flexible substrate 101 by gluing or the like. The first protective layer 104 is removable for protecting the flexible substrate 100 during its transport, preventing deformation or damage thereof, and removing the first protective layer 104 after the transfer is completed, not present in the The final flexible substrate product. It can be understood that the first protective layer 104 may not be provided when the support layer 103 can provide sufficient protection and support.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, and improvements made within the spirit and scope of the present invention should be included in the scope of the present invention. Inside.

Claims

A flexible substrate, comprising: a flexible substrate, a functional layer disposed on one side of the flexible substrate, and a support layer disposed on a side of the flexible substrate facing away from the functional layer, the support layer A plurality of support ribs that are independent of each other and spaced apart are included.
The flexible substrate according to claim 1, wherein the flexible substrate is bent to form a curved center line, and each two adjacent support ribs are symmetrically disposed about the bending center line.
The flexible substrate according to claim 2, wherein a distance between the two adjacent support ribs is greater than a radius of curvature of the flexible substrate when bent in the interval.
The flexible substrate according to claim 3, wherein the distance of the interval is 1-4 mm larger than the radius of curvature.
The flexible substrate according to any one of claims 1 to 4, wherein the support rib is fixed to the flexible substrate by coating or printing.
The flexible substrate according to claim 5, wherein the support rib is made of a thermosetting organic material or a photosensitive resin material.
The flexible substrate according to any one of claims 1 to 4, wherein the flexible substrate further comprises a first protective layer removably attached to a side of the support layer facing away from the flexible substrate.
A method for fabricating a flexible substrate, comprising:

S1, providing a flexible substrate, forming a functional layer on one side of the flexible substrate;

S2, forming a support layer on a side of the flexible substrate facing away from the functional layer; the support layer comprises a plurality of support ribs that are independent of each other and spaced apart.
The method of manufacturing a flexible substrate according to claim 8, further comprising:

S3, forming a removable first protective layer on a side of the support layer facing away from the flexible substrate.
The method of manufacturing a flexible substrate according to claim 8, wherein the step S2 comprises:

The support ribs are formed on a flexible substrate by coating or printing.
The method of manufacturing a flexible substrate according to claim 10, wherein the support rib is made of a thermosetting organic material or a photosensitive resin.