TWI700781B - Method for pre-separating flexible display and carrier board - Google Patents

Abstract

The present invention relates to a method for pre-separating a flexible display and a carrying plate. The carrying plate is first placed on the carrying mechanism of the laser equipment, and the carrying plate is directed toward the light-emitting side of the laser device of the laser equipment, and then the laser is used The device is used to project a plurality of laser rays on the release layer of the flexible display, so that a predetermined oblique laser scanning line is formed between the laser shot on the cutting path and the cutting path, and the laser device then follows the cutting path The laser action is repeated repeatedly, so that the laser has a plurality of oblique laser scan lines on the cutting path. Because of the oblique angle formed between the oblique laser scan line and the cutting path, the oblique laser scan line does not occur Parallel cutting channels can avoid excessive and uneven thermal stress accumulation, thereby preventing the film from curling, maintaining good film flatness and improving overall yield, thereby meeting the requirements of automated manufacturing processes.

Description

Method for pre-separating flexible display and carrier board

The present invention provides a method for pre-separating a flexible display and a carrying plate, especially the angle between the plural oblique laser scanning lines projected by the laser device and the cutting path, so that no cutting occurs during the irradiation process. If the channels are parallel, the accumulation of thermal stress can be avoided, thereby preventing the film from curling and improving the overall yield.

According to the arrival of the Internet of things (IoT) and Industry 4.0 (Industry 4.0) era, the number and applications of connected devices have increased dramatically, and the communication and interaction between these connected devices are mostly Automatically without human intervention, so there will be more and more devices that need to automatically cooperate with each other to complete a specific overall manufacturing process. However, under unmanned automatic operation, every The yield and accuracy of a workstation are very important, so that the low yield and accuracy will not affect the smoothness of the operation, or even the shutdown, which will delay the overall manufacturing process.

Furthermore, due to the continuous R&D and improvement of the technology of LCD and touch panel manufacturing, the new generation of product applications are designed to be lighter, thinner, energy-saving, flexible, or larger in size. However, please Refer to Figures 6, 7, and 8, the film layer A1 of the general flexible panel A (such as: OLED) is bonded to the substrate B through the release layer A2, and In the packaging process, the laser pre-separation process is performed first, and the laser device will first project a plurality of laser rays C onto the cutting track A3 of the flexible panel A, so that the laser scanning line C1 is formed on the cutting track A3 , And then repeatedly repeat the aforementioned laser step, so that there are multiple laser scanning lines C1 on the cutting track A3 of the flexible panel A, thereby causing the release layer A2 to dissociate, thereby facilitating the subsequent vacuum of the film layer A1 The action of adsorption and removal. However, the current plural laser scanning line C1 uses horizontal or vertical direction to laser on the cutting track A3, so when the laser scanning line C1 is projected to the corner of the cutting track A3, its laser The scanning line C1 must overlap in parallel with the cutting track A3, so that the thermal stress at the overlap is too high, causing the film A1 to be partially curled due to excessive heating, which affects the flatness and good quality of the film A1. Therefore, the film layer A1 cannot be absorbed by the vacuum, so that the film layer A1 cannot be followed by a continuous automated manufacturing process, which seriously affects the working hours and productivity, and cannot meet the industry trend of Industry 4.0.

Therefore, how to solve the above-mentioned deficiencies and inconveniences of conventional use is the direction that relevant industries in this industry want to study and improve.

Therefore, in view of the above-mentioned deficiencies, the inventor is the inventor of the invention patent who designed this method of pre-separation of the flexible display and the carrier after collecting relevant information, and through multiple evaluations and considerations.

The main purpose of the present invention is that the carrier plate can be placed on the carrier mechanism of the laser equipment, and the carrier plate faces the light-emitting side of the laser device of the laser equipment, and the laser device faces the release layer of the flexible display Project a plurality of laser rays to reduce the film release force or separate the film, and use the plurality of laser rays to construct an oblique laser scan line that passes through the cutting path, and the oblique laser scan line is the same as the cutting path A preset oblique angle is formed between them, and the laser device then follows the preset path The cutting path with the length of the cutting path repeatedly performs the laser action, so that the laser on the cutting path has a plurality of oblique laser scanning lines. Because of the oblique angle formed between the oblique laser scanning line and the cutting path, the oblique laser scanning The line will not be parallel to the cutting path, which can avoid excessive and uneven thermal stress accumulation, thereby preventing the film from being curled, maintaining good film flatness and improving overall yield, which can be in line with automated manufacturing processes The purpose of the demand.

The secondary purpose of the present invention is that after the laser device has lasered a plurality of oblique laser scan lines, the types of oblique laser scan lines at the sides or corners of the cutting path are all the same, which can improve the uniformity of irradiation quality , For the purpose of subsequent film separation operations, to avoid film damage due to inconsistent quality.

Another object of the present invention is that the laser device is a linear oblique laser scan line that can be assembled through a plurality of laser rays, and the linear oblique laser scan line can be accurately and cut. The formation of contact can achieve the purpose of improving the accuracy of the pre-separation operation.

Another object of the present invention is that the plural laser light rays projected by the laser device of the laser equipment first penetrate the carrier plate and then project to the release layer of the flexible display, so that the film of the flexible display does not need to be It has the effect of light transmission, so as not to limit the film transmittance, material and other usage restrictions, and the light-transmitting material carrier plate can reduce the occurrence of reflection, so as to achieve the purpose of maintaining a good laser yield.

Another object of the present invention is that the oblique laser scan line projected by the laser device is a single oblique shape, so the carrying mechanism only needs to move through the X and Y axes to move the cutting path to a straight line or a curved path The projection is completed, so that the bearing mechanism does not need to be provided with an axial rotation mechanism to change the azimuth angle of the laser scanning line, thereby achieving the purpose of reducing equipment costs and manufacturing time.

1‧‧‧Carrier board

2‧‧‧Flexible display

20‧‧‧Invalid area

21‧‧‧Release layer

22‧‧‧Film

23‧‧‧Electronic components

24‧‧‧Cut Road

3‧‧‧Laser equipment

31‧‧‧Carrier mechanism

311‧‧‧Mobile mechanism

312‧‧‧Carrier Platform

32‧‧‧Laser device

321‧‧‧Laser beam

33‧‧‧Slanted laser scanning line

A‧‧‧Flexible Panel

A1‧‧‧Film

A2‧‧‧Release layer

A3‧‧‧cutting road

B‧‧‧Substrate

C‧‧‧Laser beam

C1‧‧‧laser scanning line

The first figure is a flowchart of the present invention.

The second figure is a top view of the present invention.

The third figure is a partial enlarged view of part c of the second figure of the present invention.

The fourth figure is a schematic diagram of the action of the laser device of the present invention when in use.

The fifth figure is a schematic diagram of the action of the laser device of the present invention after use.

The sixth picture is a top view of the conventional wisdom.

The seventh figure is a schematic diagram of the operation of the conventional laser equipment in use.

The eighth figure is a schematic diagram of the operation of the conventional laser equipment after use.

In order to achieve the above-mentioned purposes and effects, the technical means and structure adopted by the present invention are illustrated in detail in the following description of the preferred embodiments of the present invention, so as to fully understand.

Please refer to the first, second, third, fourth, and fifth figure. It can be clearly seen from the figure that the carrier plate 1 is made of a light-transmitting material that allows laser light to pass through, and is placed on the surface of the carrier plate 1. A flexible display 2 is combined, and the flexible display 2 has a release layer 21 bonded to the surface of the carrier plate 1, and the release layer 21 is combined with a film 22 on the surface, and the film 22 is provided on the other side surface of the carrier plate 1 At least one electronic component 23, and the surface of the flexible display 2 is located outside the invalid area 20 of the electronic component 23 with a cutting channel 24 having a preset shape (such as a square or a round frame, etc.), and the carrier board 1 and the flexible display 2 The method of pre-separation includes the following steps:

(a) The bearing plate 1 can be placed on the bearing mechanism 3 of the laser equipment 3 first 1, and make the carrier plate 1 face the light-emitting side of the laser device 32 of the laser device 3.

(b) The laser device 32 is used to project a plurality of laser rays 321 to the release layer 21 of the flexible display 2 to reduce the release force of the film 22 or separate the film 22, so as to be composed of the plural laser rays 321 The oblique laser scanning line 33 passing through the cutting lane 24, and the oblique laser scanning line 33 forms a predetermined oblique angle with the cutting lane 24.

(c) The laser device 32 repeats the laser action along the cutting path 24 of the preset path length, so that the laser on the cutting path 24 emits a plurality of oblique laser scanning lines 33.

The carrier plate 1 is preferably made of glass material to have good light transmittance, but in practical applications, it can also be an organic light emitting diode panel (OLED), a touch panel (TSP), or a polymethyl It is made of transparent materials such as acrylic (PMMA) or acrylic sheet.

Furthermore, the film 22 of the flexible display 2 may preferably be polyimide (PI), but in practical applications, it may also be polyethylene terephthalate (PET or PETE), Polyethylene (Polyethyleme, PE) or polyolefin (Polyolefin, PO) and other membranes.

Moreover, the electronic components 23 of the above-mentioned flexible display 2 can be wires, dielectric layers, liquid crystal or multilayer electronic components, etc., which can be used to drive organic light-emitting diodes, touch panels, film sensors, etc. formed on the film 22. Circuit elements such as electroluminescence (EL) displays or liquid crystal displays; and the depth of the cutting channel 24 of the flexible display 2 can reach the surface of the carrier board 1.

In the above step (a), the carrying mechanism 31 of the laser device 3 includes a moving mechanism 311 and a carrying platform 312 assembled on the moving mechanism 311, wherein the moving mechanism 311 can move in the X and Y axial directions, and the carrying The platform 312 can be a carrying platform 312 with a vacuum suction function. When the carrying plate 1 is placed on the carrying mechanism 31 of the laser device 3, the carrying platform 312 will vacuum suck the film 22 or at least one electronic component of the flexible display 2 23, and the carrier board 1 will face the light-emitting side of the laser device 32 of the laser device 3, so that the laser device 32 will first penetrate the carrier board when projecting a plurality of laser rays 321 in step (b) 1. Then project to the release layer 21 of the flexible display 2, and when in step (c), the moving mechanism 311 can be moved to make the multiple oblique laser scanning lines 33 according to the shape of the cutting track 24 Perform preset path length projection.

However, the predetermined oblique angle θ between the oblique laser scan line 33 projected by the laser device 32 and the cutting track 24 in the above step (b) is between 0 and 90 degrees, and preferably Is 45 degrees.

In addition, when the laser device 32 projects a plurality of oblique laser scanning lines 33 toward the cutting path 24 of the flexible display 2 in the above step (c), the predetermined path length is irradiated according to the shape of the cutting path 24, and the two adjacent A distance X between the oblique laser scanning lines 33 is formed to reduce the curling phenomenon of the film 22, and the overlap rate of the two oblique laser scanning lines 33 can be actively controlled through the distance X, so as to avoid excessive laser intensity , Excessive concentration, causing damage to the flexible display 2, and the size of the spacing X can also be adjusted to change the size of the thermal stress accumulated on the release layer 21 on both sides of the cutting channel 24; Moreover, the aforementioned cutting channel 24 The preset path length can be a partial path of the cutting track 24 (e.g., single side) or the entire path of the cutting track 24 (e.g., multiple sides), and when the laser device 32 projects and forms the oblique laser scanning line 33, it can be first The cutting lane 24 on the side where the separation of the film 22 starts starts to project.

In actual use of the present invention, the carrier plate 1 can be placed on the carrier mechanism 31 of the laser equipment 3 first, and the carrier plate 1 is directed toward the light-emitting side of the laser device 32 of the laser equipment 3, and the carrier plate 1 is to be carried. After the position is stabilized, the laser device 32 will project toward the release layer 21 of the flexible display 2 to reduce the release force of the film 22 or directly separate the multiple laser rays 321, and the multiple laser rays 321 pass through first Through the carrier plate 1, and then projected to the release layer 21 of the flexible display 2 to form an oblique laser scanning line 33 passing through the cutting channel 24 by a plurality of laser rays 321, and then cut along a preset length The lane 24 projects a plurality of laser rays 321 repeatedly, so that the laser on the cutting lane 24 has a plurality of oblique laser scan lines 33. Because the plurality of oblique laser scan lines 33 are inclined, the plural oblique laser scans The wires 33 will be in point contact with the cutting lane 24, so that the average thermal stress on the left and right sides of the cutting lane 24 is the same, so as to improve the uniformity of the thermal stress around the cutting lane 24, thereby avoiding the conventional Parallel irradiation can cause excessive thermal stress accumulation, thereby preventing the film 22 at the corners of the cutting path 24 from curling and missing, so as to achieve the purpose of maintaining good flatness of the film 22.

The present invention has the following advantages:

(1) The laser device 32 repeats the laser action along the cutting track 24 of the preset path length, so that after the laser has a plurality of oblique laser scanning lines 33 on the cutting track 24, the film of the flexible display 2 can be made The release force of 22 is reduced or can be directly separated. Because the plural oblique laser scanning lines 33 are inclined, the oblique laser scanning lines 33 will not be parallel to the cutting path 24, which can avoid thermal stress. The accumulation is too high and uneven, which can prevent the film 22 from being curled, so as to maintain the good flatness of the film 22 and improve the overall yield, thereby meeting the effect of automated manufacturing requirements.

(2) The laser device 32 only needs to project a single type of oblique laser scan line 33 to irradiate all the cutting lane 24, so the oblique laser scan line 33 at the side or corner of the cutting lane 24 If the type is the same, the uniformity of the irradiation quality can be improved, so that when the film 22 is separated later, the film 22 can be prevented from being damaged due to the different quality.

(3) The laser device 32 is a linear oblique laser scanning line 33 that can be assembled through a plurality of laser rays 321, and the linear oblique laser scanning line 33 can be accurately aligned with the cutting track 24 Form contact to improve the accuracy of the pre-separation operation.

(4) The multiple laser beams 321 projected by the laser device 32 of the laser equipment 3 first penetrate the carrier plate 1, and then project to the release layer 21 of the flexible display 2, which can make the film of the flexible display 2 22 does not need to have the effect of light transmission, so as not to limit the transparency, material and other use restrictions of the film 22, thereby not affecting the material selectivity of the film 22, and the plurality of laser rays 321 can be carried by the transparent material The board 1 reduces the occurrence of reflections so as to maintain a good laser projection yield.

(5) The oblique laser scanning line 33 projected by the laser device 32 is in a single inclination shape, so the carrying mechanism 31 of the laser device 3 only needs to move through the X and Y axes to move the cutting lane 24 The projection of the linear path or the curved path is completed, so that the bearing mechanism 31 does not need to be provided with an axial rotation mechanism to change the azimuth angle of the laser scanning line, thereby reducing equipment cost and manufacturing time.

The above detailed description is for a preferred and feasible embodiment of the present invention. However, the embodiment is not intended to limit the scope of the patent application of the present invention. All other equivalent changes and modifications made without departing from the technical spirit of the present invention Changes should be included in the present invention In the scope of patents covered.

In summary, the method of pre-separating the flexible display and the carrier plate of the present invention can indeed achieve its effects and purposes when used. Therefore, the present invention is truly an invention with excellent practicability and meets the requirements of an invention patent application. The application is filed in accordance with the law, and I hope that the review committee will grant this case as soon as possible to protect the inventor’s hard work. If the review committee of the Bureau has any doubts, please send me instructions, and the inventor will do his best to cooperate, and I feel good.

Claims (10)

A method for pre-separating a flexible display from a carrier plate. The carrier plate is made of a light-transmitting material for laser scanning lines to pass through. The surface of the carrier plate is combined with a flexible display, and the flexible display is combined with the carrier. The release layer on the surface of the board, and the surface of the release layer is combined with a film, and then at least one electronic component is provided on the surface of the film on the other side of the carrier plate, and the surface of the flexible display is located in an inactive area outside the electronic component The method for pre-separating the carrier board and the flexible display with a cutting channel in a predetermined shape includes the following steps: (a) first place the carrier board on the carrier mechanism of the laser device, and Make the carrier plate face the laser device light-emitting side of the laser device; (b) The laser device is a plurality of lasers projected toward the release layer of the flexible display for reducing the release force of the film or separating the film The light rays are used to form an oblique laser scanning line passing through the cutting path by the plurality of laser light rays, and the oblique laser scanning line forms a predetermined oblique angle with the cutting path; (c) The laser device then repeatedly performs a laser action along the cutting path of a preset path length, so that the laser on the cutting path emits the plurality of oblique laser scanning lines. For example, the method for pre-separating the flexible display and the carrier board described in the first item of the scope of patent application, wherein the carrier board is made of glass material, organic light emitting diode panel, touch panel, polymethacrylate or acrylic board to make. For example, the method for pre-separating the flexible display and the carrier board as described in the first item of the patent application, wherein the film is made of polyimide, polyethylene terephthalate, polyethylene or polyolefin. The method for pre-separating the flexible display and the carrier board as described in item 1 of the scope of patent application, wherein The electronic component is a wire, a dielectric layer, a liquid crystal or a multilayer electronic component. For example, the method for pre-separating the flexible display from the carrier board described in the first item of the patent application, wherein the preset shape of the cutting path is a square or a round frame. For example, the method for pre-separating the flexible display and the carrier board as described in the first item of the scope of patent application, wherein the carrier mechanism in step (a) includes a moving mechanism for X and Y axial movement and assembly on the moving mechanism and having A carrying platform with a vacuum suction function. When the carrying plate is placed on the carrying mechanism of the laser device, the carrying platform vacuum sucks the film or the at least one electronic component of the flexible display, and the carrying plate It will face the light-emitting side of the laser device of the laser device, so that when the laser device projects the plurality of laser rays in step (b), it will first penetrate the carrier plate and then be projected to the flexible display At the release layer, and in step (c), the moving mechanism is then displaced to make the plural oblique laser scanning lines project a predetermined path length according to the shape of the cutting path. The method for pre-separating the flexible display and the carrier board as described in item 1 of the scope of patent application, wherein in step (b) the preset oblique between the oblique laser scanning line and the cutting path projected by the laser device The angle of the angle is between 0 and 90 degrees. The method for pre-separating the flexible display and the carrier board as described in the first item of the scope of patent application, wherein the preset path length of the cutting path in step (c) is the partial path of the cutting path or the entire path of the partial cutting path. For the method for pre-separating the flexible display and the carrier board as described in the first item of the scope of patent application, when the laser device in step (c) projects and forms the oblique laser scanning line, it is first separated from the film The cutting lane on the side starts to project. For example, the method for pre-separating the flexible display and the carrier board as described in item 1 of the scope of patent application, which In this step (c), a distance between two adjacent oblique laser scanning lines is formed for reducing film curling.

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