Method for manufacturing a jig for ceramic firing

Abstract

To inexpensively and easily manufacture a ceramic substrate having been versatilely coated with a ceramic, for various applications.SOLUTION: In a ceramic coating method and a method for manufacturing a ceramic firing jig using the method: a ceramic paste is dotted on a surface of a ceramic substrate (2) in a projecting shape by printing; a top edge of the ceramic paste is formed into a hemispherical shape by leveling the ceramic paste; and the ceramic paste is then fired to coat the surface of the ceramic substrate (2) with a plurality of projection-shaped ceramic (projections 4). A ceramic green sheet is used as the ceramic substrate (2), and the printed ceramic paste is dried to harden the top edge into a hemispherical shape, and then the ceramic green sheet and ceramic paste are fired simultaneously.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a ceramic coating method for coating a plurality of protruding ceramics on the surface of a ceramic substrate, and a method for manufacturing a jig for ceramic firing using the same method.

Background Art

[0002] Conventionally, ceramics fired in a sheet (plate) shape are widely used for circuit boards for mounting electronic components, reflectors for reflecting light irradiated from light-emitting diodes, and jigs for ceramic firing used as setters when firing objects to be fired.

[0003] In conventional jigs for ceramic firing, etc., a ceramic green sheet having a material and composition suitable for the porosity and surface roughness of the surface of the ceramic substrate after firing according to the object to be fired is used for the purpose of discharging gases generated from the object to be fired during firing (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the above-mentioned conventional jigs for ceramic firing, etc., since a ceramic green sheet having a material and composition suitable for the porosity and surface roughness of the surface of the ceramic substrate after firing according to the object to be fired is used, it is necessary to use an expensive ceramic green sheet, and there is no versatility. Also, it has been difficult to satisfactorily discharge gases generated from the object to be fired during firing only by the porosity and surface roughness of the surface of the ceramic substrate after firing.

Means for Solving the Problems

[0009] Therefore, in the present invention according to claim 1, in a method for manufacturing a ceramic firing jig used as a setter when firing an object to be fired, Made of a ceramic green sheet Ceramic paste is dotted in a protruding shape on both the front and back surfaces of a ceramic substrate by printing, Having a higher viscosity than the ceramic green sheet the ceramic paste is leveled so that the upper end of the ceramic paste forms a hemispherical shape, the ceramic paste is dried so that the upper end of the ceramic paste is cured into a hemispherical shape, and then, by firing the ceramic paste, a ceramic firing jig in which a plurality of hemispherical protruding ceramics are coated on both the front and back surfaces of the ceramic substrate is manufactured. Also, in the present invention according to claim 2, in the present invention according to claim 1, the leveling is forcedly performed by vibration. Also, in the present invention according to claim 3, in the present invention according to claim 1 or claim 2, the ceramic paste dotted in a protruding shape on both the front and back surfaces is made to have different patterns, heights, and sizes of the protrusions on the front and back.

Advantages of the Invention

[0010] And in the present invention, the following effects are achieved.

[0011] That is, in the present invention, in the ceramic coating method, ceramic paste is dotted in a protruding shape on the surface of a ceramic substrate by printing, the upper end of the ceramic paste is formed into a hemispherical shape by leveling the ceramic paste, and then, by firing the ceramic paste, a plurality of protruding ceramics of various patterns are formed on the surface of the ceramic substrate. Therefore, a versatile ceramic-coated ceramic substrate can be manufactured inexpensively and easily according to the application.

[0012] In particular, when a ceramic green sheet is used as the ceramic substrate, the printed ceramic paste is dried and the upper end is cured into a hemispherical shape, and then the ceramic green sheet and the ceramic paste are fired simultaneously, the handling (processability) before firing becomes good, and furthermore, the ceramic substrate with a ceramic coating can be manufactured inexpensively and easily.

[0013] Also, when the ceramic paste is printed in a protruding shape on both the front and back surfaces of the ceramic substrate, a plurality of protruding ceramics with various patterns can be formed on both the front and back surfaces of the ceramic substrate, and a versatile ceramic-coated ceramic substrate can be manufactured inexpensively and easily according to the application.

[0014] In addition, in the present invention, in the method for manufacturing a ceramic firing jig used as a setter when firing an object to be fired, the ceramic paste is dotted in a protruding shape on the surface of the ceramic substrate by printing, the upper end of the ceramic paste is formed into a hemispherical shape by leveling the ceramic paste, and then, by firing the ceramic paste, a ceramic firing jig in which a plurality of protruding ceramics are coated on the surface of the ceramic substrate is manufactured. Therefore, a plurality of protruding ceramics with various patterns can be formed on the surface of the ceramic substrate by printing, and a versatile ceramic firing jig can be manufactured inexpensively and easily according to the application.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0016] Hereinafter, a specific configuration of a ceramic coating method according to the present invention and a method for manufacturing a jig for ceramic firing using the method will be described with reference to the drawings.

[0017] As shown in FIG. 1, a jig 1 for ceramic firing according to the present invention is a jig used as a setter when firing an object to be fired, and is obtained by coating the surface of a ceramic substrate 2 with a ceramic by the ceramic coating method according to the present invention.

[0018] Here, as the ceramic substrate 2, an unfired ceramic green sheet is used, and a ceramic coating is applied to a predetermined region (work region 3 where the object to be fired is placed during firing) on the surface (upper surface).

[0019] For the ceramic coating, ceramic paste is dotted in a protrusion shape in a predetermined pattern (shape) on the surface (work region 3) of the ceramic substrate 2 by printing such as screen printing.

[0020] After printing, the ceramic paste is leveled on the surface of the ceramic substrate 2 due to the viscosity of the ceramic paste, and the upper end of the ceramic paste is formed into a hemispherical shape. Note that the leveling may be performed naturally or may be forced by vibration or the like.

[0021] Thereafter, the printed ceramic paste is dried to cure the upper end of the ceramic paste into a hemispherical shape on the surface of the ceramic substrate 2.

[0022] Thereafter, the ceramic substrate 2 (ceramic green sheet) and the ceramic paste are fired simultaneously at a predetermined temperature.

[0023] As a result, a plurality of protrusion-shaped ceramics can be coated on the surface of the ceramic substrate 2, and as shown in FIG. 2, a jig 1 for ceramic firing in which a plurality of ceramic protrusions 4 having hemispherical upper ends are formed on the surface of the ceramic substrate 2 can be manufactured.

[0024] In the ceramic firing jig 1 manufactured in this way, the ceramic protrusions 4 formed on the surface of the ceramic substrate 2 can allow the gas generated from the object to be fired or the like during firing to escape well, can cause the object to be fired to shrink evenly without inhibiting the shrinkage of the object to be fired, can fire the entire surface of the object to be fired evenly without unevenness, and further, after firing, the object to be fired can be easily detached without adhering to the ceramic firing jig 1, so that peeling or the like of the surface of the ceramic firing jig 1 does not occur, and the long life of the ceramic firing jig 1 can be achieved.

[0025] In the above ceramic coating method, the pattern (shape), size, height, etc. of the ceramic paste dotted in a protruding shape by the screen (stencil) used for printing can be appropriately set.

[0026] As the ceramic paste, those having the same material and composition as the ceramic substrate 2 such as alumina 99 may be used, or those having a material and composition different from the ceramic substrate 2 such as zirconia and yttria may be used. In particular, in the ceramic firing jig 1 or the like, a relatively inexpensive material (for example, alumina or the like) of the ceramic substrate 2 can be used to coat a relatively expensive ceramic (for example, zirconia or the like) in a protruding shape, and the cost of the ceramic firing jig 1 or the like can be reduced.

[0027] Further, the ceramic paste only needs to form protrusions 4 having a hemispherical upper end by leveling, and it is preferable to use a paste having a viscosity of 100 to 250 Pas, which is higher in viscosity than the ceramic substrate 2. In addition, the entire surface of the ceramic substrate 2 (work area 3) may be coated with ceramic so that the peripheral portion (skirt portion) of the lower end of the protrusion 4 after leveling contacts the peripheral portion of the lower end of the adjacent protrusion 4.

[0028] In the above-described ceramic coating method, the ceramic coating is applied only to the surface of the ceramic substrate 2, but the ceramic coating may be applied to both the front and back surfaces of the ceramic substrate 2. In that case, after printing the ceramic paste on the surface of the green sheet, the ceramic paste may be printed on the back surface of the green sheet, and after drying, the green sheet and the front and back ceramic pastes may be fired simultaneously.

[0029] In particular, in the ceramic firing jig 1, by coating the front and back surfaces of the ceramic substrate 2 with protruding ceramics, both surfaces of the ceramic firing jig 1 can be used during the firing of the object to be fired, the life (number of uses) of the ceramic firing jig 1 can be extended, and by making the patterns, heights, sizes, etc. of the protrusions on the front and back of the ceramic substrate 2 different, the front and back of the ceramic firing jig 1 can be used appropriately according to the object to be fired.

[0030] Also, in the above-described ceramic coating method, by using the green sheet before firing as the ceramic substrate 2 and firing the green sheet and the ceramic paste simultaneously, the number of firing steps can be reduced and the manufacturing cost can be lowered, but it is not limited to this, and printing may be performed on the ceramic substrate 2 after firing.

[0031] Also, in the above-described ceramic coating method, the ceramic coating is applied to a predetermined area (work area 3) on the surface (upper surface), but the ceramic coating may be applied to the entire surface.

[0032] As described above, the above-described ceramic coating method has a configuration in which the ceramic paste is dotted in a protruding shape on the surface of the ceramic substrate 2 by printing, the upper end of the ceramic paste is formed in a hemispherical shape by leveling the ceramic paste, and then the ceramic paste is fired to coat the surface of the ceramic substrate 2 with a plurality of protruding ceramics (protrusions 4).

[0033] Therefore, in the ceramic coating method with the above configuration, a plurality of protruding ceramics with various patterns can be formed on the surface of the ceramic substrate 2 by printing, and a versatile ceramic-coated ceramic substrate 2 can be manufactured inexpensively and easily according to the application.

[0034] Further, in the above ceramic coating method, a ceramic green sheet is used as the ceramic substrate 2, and after the printed ceramic paste is dried and the upper end is cured into a hemispherical shape, the ceramic green sheet and the ceramic paste are fired simultaneously.

[0035] Therefore, in the ceramic coating method with the above configuration, the handling before firing (handleability) is good, and the ceramic-coated ceramic substrate 2 can be manufactured more inexpensively and easily.

[0036] In addition, the above ceramic coating method is configured to print the ceramic paste in a protruding shape on both the front and back surfaces of the ceramic substrate 2.

[0037] Therefore, in the ceramic coating method with the above configuration, a plurality of protruding ceramics (protrusions 4) with various patterns can be formed on both the front and back surfaces of the ceramic substrate 2, and a versatile ceramic-coated ceramic substrate 2 can be manufactured inexpensively and easily according to the application.

[0038] Furthermore, the manufacturing method of the above ceramic firing jig 1 is to dot the ceramic paste in a protruding shape on the surface of the ceramic substrate 2 by printing, form the upper end of the ceramic paste into a hemispherical shape by leveling the ceramic paste, and then fire the ceramic paste to manufacture the ceramic firing jig 1 with a plurality of protruding ceramics (protrusions 4) coated on the surface of the ceramic substrate 2.

[0039] Therefore, in the manufacturing method of the ceramic firing jig 1 with the above configuration, a plurality of protruding ceramics (protrusions 4) with various patterns can be formed on the surface of the ceramic substrate 2 by printing, and a versatile ceramic firing jig 1 can be manufactured inexpensively and easily according to the application.

Explanation of Signs

[0040] 1 Ceramic firing jig 2 Ceramic substrate 3 Work area 4 Protrusion

Claims

1. In a method for manufacturing a ceramic firing jig used as a setter when firing an object to be fired, ceramic paste having a higher viscosity than the ceramic green sheet is dotted in a protruding shape on both the front and back surfaces of a ceramic substrate made of a ceramic green sheet by printing, and the upper end of the ceramic paste is formed into a hemispherical shape by leveling the ceramic paste. The ceramic paste is dried to cure the upper end of the ceramic paste into a hemispherical shape, and then the ceramic paste is fired to produce a ceramic firing jig in which a plurality of hemispherical protruding ceramics are coated on both the front and back surfaces of the ceramic substrate. A method for manufacturing a ceramic firing jig, characterized in that.

2. The method for manufacturing a ceramic firing jig according to claim 1, wherein the leveling is forcibly performed by vibration.

3. The method for manufacturing a ceramic firing jig according to claim 1 or claim 2, wherein the ceramic paste dotted in a protruding shape on both the front and back surfaces has different patterns, heights, and sizes of the protrusions on the front and back.

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