JP2008003388A - Flat panel display and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flat panel display which can be manufactured without having any oblique crack even when a scribe breaking method is employed, and a method of manufacturing the same. <P>SOLUTION: One surface of a device glass mother substrate 5 is coated with a resin material on both sides of each of scribe lines 7 set in a grating shape along the scribe lines 7. The resin material is cured and then resin members 4 are formed on both sides of each scribe line 7 on the one surface of the device glass mother substrate 5. Then a sealing glass mother substrate 6 is opposed to and joined with the one surface of the device glass mother substrate 5 where the resin members 4 are formed. Then the device glass mother substrate 5 and sealing glass mother substrate 6 are parted by the scribe breaking method along the scribe lines 7 to obtain individual pieces of organic EL displays 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a flat panel display such as an organic EL (electroluminescence) display and a manufacturing method thereof.

In recent years, flat panel displays such as LCD (Liquid Crystal Display) and PDP (Plasma Display Panel) are frequently used as display devices. Among these flat panel displays, in particular, organic EL displays are attracting attention as third-generation displays following CRT displays and LCDs.
The organic EL display has a configuration in which a sealing glass substrate for sealing an organic EL element is overlapped and bonded to a device glass substrate on which the organic EL element is formed. In such an organic EL display, a superposed substrate formed by superposing a glass mother substrate including a plurality of device glass substrates and a glass mother substrate including a plurality of sealing glass substrates is formed on each organic EL display. It is obtained by cutting into pieces.

For example, a scribe break method is used as a method of cutting the polymerization substrate into individual pieces of each organic EL display. In this scribe break method, on the surface of each glass mother substrate (both surfaces of the polymerization substrate), scribing (groove-like scratches) is made on the scribe line that becomes a boundary when the glass mother substrates are separated. Then, the surface of one glass mother substrate is pressed, stress is applied to the scribing applied to the other glass mother substrate, and the other glass mother substrate is cracked along the scribing, whereby the other glass mother substrate is The board is divided at the boundary of scribing. Further, when the surface of the other glass mother substrate is pressed, stress is applied to the scribing applied to the one glass mother substrate, and cracking along the scribing occurs in the one glass mother substrate. The board is divided at the boundary of scribing. Thereby, a superposition | polymerization board | substrate is cut into the piece of each organic EL display.
JP-A-60-57888 JP 2002-182185 A JP 2002-365648 A

However, the stress at the time of dividing is distributed and applied to portions other than the scribing, and cracks in the direction deviating from the scribe lines (so-called oblique cracks) may occur in the glass mother substrate.
Accordingly, an object of the present invention is to provide a flat panel display and a method for manufacturing the same, which can be manufactured without causing so-called oblique cracks even when the scribe break method is used.

  The invention according to claim 1 for achieving the above object has a first glass substrate having a rectangular shape in plan view, and has the same outer shape as the first glass substrate, and is superimposed on the first glass substrate. The second glass substrate bonded to each other, and the first glass substrate and the second glass substrate are interposed between the peripheral edges of the first and second glass substrates with a predetermined distance therebetween, It is a flat panel display characterized by including the resin member of planar view rectangular frame shape provided along the perimeter of the periphery.

  The flat panel display having such a configuration can be manufactured by the manufacturing method described in claim 3. That is, on one side of the first glass mother substrate, along the scribe lines set in a lattice shape, a resin material is applied in a strip shape on both sides of each scribe line at a predetermined interval with respect to the scribe line. A step of superposing and bonding a second glass mother substrate on one surface of the first glass mother substrate, and a first and second glass mother substrates by a scribe break method. Including a step of cutting the substrate along the scribe line.

When the resin material applied to one surface of the first glass mother substrate is cured, resin members are formed on both sides of each scribe line. When the first and second glass mother substrates are divided along the scribe lines, the resin member is seen in plan view along the entire circumference of the pieces (first and second glass substrates) obtained by the division. A rectangular frame will be formed.
In the scribe break method, scribing is made on the scribe lines on the outer surfaces of the first and second glass mother substrates. Then, by pressing on the scribing line along each scribe line of the second glass mother substrate, stress is applied to the scribing applied to the first glass mother substrate, and the first glass mother substrate is marked. The crack along which it arises and a 1st glass mother board | substrate is divided | segmented into the piece of a 1st glass substrate bordering on scribing. At this time, since the resin members are disposed on both sides of the scribe line, the pressing force from the second glass mother substrate side is concentrated on the scribing located between the resin members. The Therefore, the first glass mother substrate can be satisfactorily divided along the scribe line, and so-called oblique cracks can be prevented from occurring.

  Further, before and after the division of the first glass mother substrate, stress is applied to the second glass mother substrate by pressing on the scribing along each scribe line of the first glass mother substrate. The second glass mother substrate is cracked along the scribing, and the second glass mother substrate is divided into individual pieces of the second glass substrate with the scribing as a boundary. At this time, since the resin members are arranged on both sides of the scribe line, the pressing force from the first glass mother substrate side is concentrated on the scribing located between the resin members. The Therefore, the second glass mother substrate can be satisfactorily divided along the scribe line, and so-called oblique cracks can be prevented from occurring.

That is, a flat panel display including a resin member having a rectangular frame shape in plan view provided between the first glass substrate and the second glass substrate along the entire circumference of the peripheral edge adopts the scribe break method. Even so, it can be produced without generating so-called oblique cracks.
In addition, as described in claim 2, the first glass substrate is a device glass substrate on which an organic electroluminescence element is formed, and the second glass substrate seals the organic electroluminescence element. It may be a sealing glass substrate.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1A is a plan view schematically showing a configuration of an organic EL display according to an embodiment of the present invention. FIG. 1B is a schematic cross-sectional view of the organic EL display shown in FIG. 1A.
This organic EL display 1 is a device glass substrate 2 as a first glass substrate on which an organic EL element (not shown) is formed, and serves as a second glass substrate for sealing the organic EL element. The sealing glass substrate 3 is superposed and bonded. The device glass substrate 2 and the sealing glass substrate 3 are formed in a rectangular shape having the same size in plan view.

Between the device glass substrate 2 and the sealing glass substrate 3, a resin member 4 having a rectangular frame shape in plan view is interposed. The resin member 4 is made of, for example, an epoxy resin, has a width of about 100 μm, and is separated from the peripheral edges of the device glass substrate 2 and the sealing glass substrate 3 by a predetermined distance (for example, about 10 μm). It is provided along the entire circumference.
2A to 2E are diagrams for explaining a manufacturing process of the organic EL display 1 shown in FIGS. 1A and 1B.

When the organic EL display 1 is manufactured, a device glass mother substrate 5 as a first glass mother substrate including a plurality of (for example, six) device glass substrates 2 and the device glass mother substrate 5 are included. A sealing glass mother substrate 6 as a second glass mother substrate including the same number of sealing glass substrates 3 as the device glass substrate 2 is used.
First, as shown in FIGS. 2A and 2B, the resin member 4 is formed on one surface of the device glass mother substrate 5 or the sealing glass mother substrate 6.

  Specifically, as shown in FIG. 2A, for example, on one surface of the device glass mother substrate 5, a lattice-shaped scribe line 7 that becomes a boundary when the device glass mother substrate 5 is cut into the device glass substrate 2. Along the scribe lines 7 extending in the row direction (left and right direction on the paper surface of FIG. 2A), the resin members 4 are arranged on both sides of the scribe line 7 in the column direction (direction orthogonal to the left and right direction on the paper surface of FIG. These materials are applied so as to be parallel to the scribe lines 7 at a predetermined interval (for example, about 10 μm) in the column direction, and to be interrupted at portions intersecting with the scribe lines 7 extending in the column direction.

  Thereafter, as shown in FIG. 2B, along the scribe lines 7 extending in the column direction, resin materials are respectively provided on both sides of the scribe lines 7 in the row direction with respect to the scribe lines 7 in the row direction at predetermined intervals ( For example, it is applied so as to be interrupted at a portion intersecting with the scribe line 7 extending in the row direction in parallel with a distance of about 10 μm. Then, the applied resin material is cured, whereby the resin member 4 is formed on both sides of each scribe line 7 on one surface of the device glass mother substrate 5.

In addition, application | coating of the resin material uses each nozzle and the device glass mother board | substrate 5 while discharging resin material from each nozzle using the two nozzles provided in the space | interval (for example, about 20 micrometers) mutually. This is achieved by relatively moving along the scribe line 7.
Here, the case where the resin member 4 is formed on one surface of the device glass mother substrate 5 is taken as an example, but one surface of the sealing glass mother substrate 6 (to be bonded to face the device glass mother substrate 5). The resin member 4 may be formed on the surface.

Next, the sealing glass mother substrate 6 is bonded to one surface of the device glass mother substrate 5 on which the resin member 4 is formed. Then, as shown in FIGS. 2C to 2E, the device glass mother substrate 5 and the sealing glass mother substrate 6 are divided along the scribe lines 7 by a scribe break method.
Specifically, as shown in FIG. 2C, the outer surface of each of the device glass mother substrate 5 and the sealing glass mother substrate 6 is marked on the scribe line 7 using, for example, a diamond cutter (not shown). (For example, a V-groove wound) 8 is applied.

  Then, as shown in FIG. 2D, the top of the scribing 8 along each scribe line 7 of the sealing glass mother substrate 6 is pressed by the resin pressing member 9. Thereby, stress is applied to the scribing 8 attached to the device glass mother substrate 5, and the device glass mother substrate 5 is cracked along the scribing 8, and the device glass mother substrate 5 is divided at the scribing 8. . At this time, since the resin members 4 are disposed on both sides of each scribe line 7, the pressing force input from the sealing glass mother substrate 6 side is a scribing 8 located between the resin members 4. To be intensively granted. Therefore, the device glass mother substrate 5 can be satisfactorily divided along the scribe line 7, and so-called oblique cracks (breaks in the direction deviating from the scribe lines 7) can be prevented.

  Thereafter, as shown in FIG. 2E, the top of the scribing 8 along each scribe line 7 of the device glass mother substrate 5 is pressed by the resin pressing member 9. As a result, stress is intensively applied to the scribing 8 attached to the sealing glass mother substrate 6, and the sealing glass mother substrate 6 is cracked along the scribing 8. It is divided on the border. At this time, since the resin members 4 are arranged on both sides of the scribe lines 7, the pressing force input from the device glass mother substrate 5 side is applied to the scribing 8 located between the resin members 4. Granted intensively. Therefore, the sealing glass mother substrate 6 can be satisfactorily divided along the scribe lines 7, and so-called oblique cracks can be prevented from occurring.

In this way, the device glass mother substrate 5 and the sealing glass mother substrate 6 are divided at the boundary of the scribing 8, whereby the organic EL display 1 including each of the device glass substrate 2 and the sealing glass substrate 3 is obtained.
As described above, the resin member 4 having a rectangular frame shape in plan view provided along the entire circumference of the periphery of the device glass substrate 2 and the sealing glass substrate 3 with a predetermined distance from the periphery thereof. The organic EL display 1 having the above can be manufactured without generating so-called oblique cracks.

The description of one embodiment of the present invention is as described above, but the present invention can be implemented in other forms. For example, the organic EL display 1 is taken up as an example of a flat panel display, but the present invention can be applied to flat panel displays other than the organic EL display 1 such as an LCD and a PDP.
In addition, various design changes can be made within the scope of matters described in the claims.

1 is a plan view schematically showing a configuration of an organic EL display according to an embodiment of the present invention. 1B is a schematic cross-sectional view of the organic EL display shown in FIG. 1A. FIG. It is an illustrative top view for demonstrating the manufacturing process of the organic electroluminescent display shown to FIG. 1A and FIG. 1B. FIG. 2B is an illustrative plan view showing a step subsequent to FIG. 2A. FIG. 2D is an illustrative sectional view showing a step subsequent to FIG. 2B. FIG. 2D is an illustrative sectional view showing a step subsequent to FIG. 2C. FIG. 2D is an illustrative sectional view showing a step subsequent to FIG. 2D.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Organic EL display 2 Device glass substrate 3 Sealing glass substrate 4 Resin member 5 Device glass mother substrate 6 Sealing glass mother substrate 7 Scribe line

Claims (3)

A first glass substrate having a rectangular shape in plan view;
A second glass substrate having the same outer shape as the first glass substrate, overlapped and bonded to the first glass substrate;
A plane that is interposed between the first glass substrate and the second glass substrate, and is provided along the entire periphery of the periphery of the first and second glass substrates with a predetermined distance therebetween. A flat panel display comprising a resin member having a rectangular frame shape. The first glass substrate is a device glass substrate on which an organic electroluminescence element is formed,
2. The flat panel display according to claim 1, wherein the second glass substrate is a sealing glass substrate that seals the organic electroluminescence element. 3. A step of applying a resin material in a strip shape on one side of the first glass mother substrate along a scribe line set in a lattice shape on both sides of each scribe line with a predetermined interval from the scribe line. When,
A step of superimposing and bonding a second glass mother substrate on one surface of the first glass mother substrate;
And a step of dividing the first glass mother substrate and the second glass mother substrate along the scribe line by a scribe break method.

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