JP2003260882A - Sheet plate for transfer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve shape accuracy and positional accuracy of a pattern to be formed and to increase the service life of a sheet plate for transfer in the sheet plate for transfer used when a fine pattern is formed on a base plate. <P>SOLUTION: A coating layer 3 is laminated on a base sheet 2 and a fine intaglio plate pattern is formed on the surface of the coating layer 3 by channels 3a provided with a specified sectional shape. The base sheet 2 is fixed on a supporting frame 5 through a supporting sheet 4. When a pattern is transferred on the base plate 10, a glass paste 11 is filled in the channels 3a. The coating layer 3 is prepared of an RTV (or LTV) liquid silicone rubber and its hardness (JIS A6253) is JIS A15-70. The base sheet 2 is a sheet made of a low thermal expansion alloy with a thickness of 0.3-0.7 mm. The base sheet 2 is coated with a primer to strengthen adhesion between the base sheet 2 and the coating layer 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer sheet plate used for forming a pattern of fine projections on a substrate by using an intaglio printing method.

[0002]

2. Description of the Related Art In a rear panel of a plasma display device, a large number of fine partition walls are formed on the surface of a substrate, and a portion surrounded by the partition walls is a display cell corresponding to one pixel.
Since the positional accuracy and shape accuracy of the pattern due to the partition walls as described above greatly affect the quality of the plasma display device, high accuracy is required.

JP-A-4-255387, JP-A-9
Japanese Patent Laid-Open No.-134676 and Japanese Patent Laid-Open No. 10-128862 describe a method of forming fine partition walls on a substrate by using an intaglio printing method.

In these, as the material of the intaglio, a composite sheet in which a coating layer made of silicone rubber is laminated on a base sheet having rigidity is used. Grooves corresponding to the partition pattern are provided on the surface of the coating layer. Fill the groove with paste consisting of a mixture of aggregate (powder such as glass and ceramics) and binder,
After being semi-cured, the coating layer is pressed onto the substrate to be the transferred material. As a result, the paste is transferred onto the substrate 10 and a fine pattern is formed by the paste.

In the above-mentioned method, when the wall surface of the groove formed in the coating layer has scratches such as pores or cracks, if the mold release property of the silicone rubber with respect to the paste is insufficient, filling is performed. Some of the paste applied may remain in the groove. As a result, the shape accuracy of the pattern of the partition transferred on the substrate is impaired, resulting in a defect in the display device.

Further, since the base sheet supporting the silicone rubber layer is made of metal and has properties greatly different from those of the silicone rubber, the adhesion between the silicone rubber layer and the base sheet is likely to be incomplete. Therefore, when used for a long period of time, the silicone rubber layer may be partly peeled off from the base sheet, and the positional accuracy of the pattern formed on the surface of the silicone rubber layer, especially the positional accuracy in the direction along the surface of the plate surface Cause decline.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the conventional transfer sheet plate for pattern formation, and an object of the present invention is to form the shape of the transferred pattern. An object of the present invention is to provide a transfer sheet plate having excellent accuracy and positional accuracy and having a long life.

[0008]

A transfer sheet plate of the present invention comprises a rigid base sheet and a coating layer which is laminated on the base sheet and has an intaglio pattern formed on the surface thereof and made of an elastic material. In a transfer sheet plate, comprising a paste comprising a mixture of an aggregate and a binder in the pattern of the intaglio plate, and transferring the paste onto a substrate to form a pattern of fine protrusions on the substrate. The layers are RTV (Room Temper) that crosslinks and cures at room temperature
ature Vulcanization) or LTV (Low Temperature Vul) that crosslinks and cures in the temperature range of 50 ° C to 160 ° C
canization) liquid silicone rubber, and its hardness (JISK6253) is JIS A15 or more and 70 or less.

In the transfer sheet plate of the present invention, the liquid silicone rubber forming the coating layer has a property of being crosslinked and cured at room temperature or at a low temperature of 160 ° C. or lower, and therefore, the pattern from the mold is formed. Transfer can be performed easily and precisely. In addition to this, after curing, it has excellent releasability and at the same time has appropriate elasticity, and precise and accurate printing is possible. Therefore, according to the transfer sheet plate of the present invention, the paste can be easily and completely separated from the transfer sheet plate, and a pattern with good positional accuracy and shape accuracy can be formed on the substrate. Further, since the mold release property is excellent, cleaning of the surface of the transfer sheet plate can be omitted, so that damage to the transfer sheet plate can be reduced, and a high quality product can be manufactured for a long period of time. be able to.

The hardness of the coating layer is set to J as described above in order to set the elasticity for printing to an appropriate value range.
IS A 15 or more and 70 or less.

Preferably, the base sheet is made of, for example, a low thermal expansion alloy having a linear expansion coefficient of 1.5 × 10 ⁻⁶ or less, and the plate thickness thereof is 0.3 mm or more and 0.7 mm or less.

Preferably, in this case, in order to enhance the adhesiveness between the base sheet and the coating layer, 2 μm of RTV or LTV primer is attached to the adhesive surface with the coating layer.
It is applied in a thickness of not less than m and not more than 25 μm.

The coating layer itself has excellent releasability, but depending on the type of the paste,
In order to enhance the releasability, silicone oil is added to the coating layer in the range of 1 wt% or more and 30 wt% or less.
Addition of more than 30 wt% is not preferable because it repels the paste.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a transfer sheet plate according to the present invention. In the figure, 2 is a base sheet and 3 is a coating layer.

The coating layer 3 is laminated on the base sheet 2, and the surface of the coating layer 3 has grooves 3 having a predetermined cross-sectional shape.
A fine pattern is formed in a. Base sheet 2
As will be described later, is fixed to the support frame at the peripheral portion thereof via the support sheet 4. When transferring the pattern onto the substrate, the glass paste 11 (paste-like mixture of glass powder and binder) is filled in the grooves 3a on the surface of the coating layer 3.

In this example, the base sheet 2 is a low thermal expansion alloy: NAS36 (manufactured by Nippon Yakin Kogyo Co., Ltd.) and has a thickness of 0.3 mm. The coating layer 3 is R
Made from liquid silicone rubber for TV.

In order to strengthen the adhesion between the base sheet 2 and the coating layer 3, the coating layer 3 is formed by the following method.
Are formed. That is, after degreasing the surface of the base sheet 2 with toluene, the surface of the base sheet 2 is roughened using a sandpaper of about No. 400 mesh, and stains are wiped off again with toluene. Then, add 5 primers for RTV
The coating is applied in a thickness of about μm, and the primer coating is baked. The above-mentioned liquid silicone rubber is poured onto the base sheet 2 having the adhesive surface treated as described above, and the groove 3a is formed using a mold (not shown) before crosslinking, and then 100 ° C. And heat for 30 minutes in a hot plate press to cure.

By the above method, for example, the tensile strength is 3.
A transfer sheet plate having a high strength of 4 MPa or more and an elongation of about 80 to 300% and a long life can be manufactured.

An example of a method for forming a fine partition wall pattern on a substrate using this transfer sheet plate will be described with reference to FIG.

The transfer sheet plate 1 is composed of a base sheet 2 and a covering layer 3, and the base sheet 2 is fixed to a supporting frame 5 at its peripheral portion via a support sheet 4.
After the glass paste 11 (FIG. 1) is filled in the grooves 3a on the surface of the coating layer 3, excess glass paste 11 is removed from the surface of the coating layer 3 using a cleaning device (not shown) with a spatula blade. Remove. Next, the glass paste 11 is heated to evaporate a part of the solvent and bring it into a semi-cured state.

The substrate 10 to be transferred is held on the table 9. After the glass paste 11 is in a semi-cured state, the transfer sheet plate 1 is supported with the coating layer 3 facing downward with the substrate 10 facing the substrate 10 with a slight gap therebetween. Then, the base sheet 2 is pressed from the back surface side using the press roll 8 so that the surface of the coating layer 3 is covered with the substrate 10.
Press against. As a result, the glass paste 11 is transferred onto the substrate 10 as shown in FIG.
A fine pattern is formed by the glass paste 11.

In the above-described embodiment, the coating layer 3 has an RT
An example using liquid silicone rubber of V has been shown.
Even if the liquid silicone rubber (1) is used, the temperature is almost the same except that the temperature for curing is slightly higher, and the same effect can be obtained.

[0023]

The transfer sheet plate of the present invention has excellent releasability and high strength, so that the transferred pattern has excellent shape accuracy and positional accuracy, and has a long life.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a sectional structure of a transfer sheet plate according to the present invention.

FIG. 2 is a diagram showing an example of a method for transferring a pattern onto a substrate using the transfer sheet plate according to the present invention.

FIG. 3 is a diagram showing an example of a substrate having a fine pattern formed on its surface, which is manufactured using the transfer sheet plate according to the present invention.

[Explanation of symbols]

1 ... Transfer sheet plate, 2 ... Base sheet, 3 ... coating layer, 4 ... Support sheet, 5 ... Support frame, 8 ... Press roll, 9 ... table, 10 ... substrate, 11 ... Glass paste.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Junji Nagasawa             Numazu City, Shizuoka Prefecture Foot ▲ High ▼ 81 aku at 396 address             Within Rongrubo Co., Ltd. (72) Inventor Hiroaki Mizusaki             Numazu City, Shizuoka Prefecture Foot ▲ High ▼ 81 aku at 396 address             Within Rongrubo Co., Ltd. (72) Inventor Hironari Suzuki             Numazu City, Shizuoka Prefecture Foot ▲ High ▼ 81 aku at 396 address             Within Rongrubo Co., Ltd. F term (reference) 2H114 AA02 BA05 DA46 DA62 EA02                       EA05 FA02                 5C027 AA09                 5C040 GF19 JA19

Claims (4)

[Claims] 1. A rigid base sheet, and a coating layer laminated on the base sheet, having an intaglio pattern formed on the surface thereof, and made of an elastic material, the intaglio pattern comprising an aggregate and a binder. In a transfer sheet plate in which a paste made of a mixture is filled and transferred onto a substrate to form a pattern of fine protrusions on the substrate, the coating layer is made of RTV or LTV liquid silicone rubber. , Its hardness (JIS K6253) is JIS
A transfer sheet plate having a size of A15 or more and 70 or less. 2. The base sheet has a linear expansion coefficient of 1.5.
The transfer sheet plate according to claim 1, which is made of a low thermal expansion alloy of X10 ^-6 or less and has a plate thickness of 0.3 mm or more and 0.7 mm or less. 3. The RTV or LTV primer is 2 μm or more on the adhesive surface between the base sheet and the coating layer,
The transfer sheet plate according to claim 1, wherein the transfer sheet plate has a thickness of 25 μm or less. 4. The coating layer contains 1 part of silicone oil.
The transfer sheet plate according to claim 1, wherein the transfer sheet plate is added in an amount of not less than 30% by weight.