KR100586942B1 - The method for laminating multilayer by binder film - Google Patents

Abstract

The present invention relates to an interlayer lamination method using a binder film, the method of the present invention is an interlayer lamination method using a binder film in a low temperature cofired ceramics (LTCC) process of laminating a plurality of layers and firing at a low temperature, Manufacturing a binder film by printing a binder solution, laminating the binder film so that the binder solution contacts an upper surface of at least one of the plurality of layers, and directing the binder film to the first layer direction Pressurizing to, removing only the film portion of the binder film, and laminating and compressing the second layer on the first layer to which the binder solution is applied.

According to the above-described method of the present invention, the present invention has the effect of increasing the interlayer bonding force by uniformly applying the stacked plural interlayer binder solutions by inserting a binder film between the plural layers and stacking the plural layers. . In addition, it is possible to prevent the delamination phenomenon occurring after the firing process by increasing the interlayer bonding force, and to reduce the incidence of defects caused by the foliation phenomenon in the chip, which is the final product.

Binder, Film, Crimp, Layer, Solvent, LTCC

Description

Interlayer lamination method using binder film {THE METHOD FOR LAMINATING MULTILAYER BY BINDER FILM}             

1 is a process flowchart of a general LTCC process.

2 is a cross-sectional view showing an interlayer lamination process using a conventional adhesive.

3 is a manufacturing process diagram of a binder film.

4A to 4E are cross-sectional views of the interlayer lamination method using the binder film according to the present invention.

5 is a flowchart showing an interlayer lamination method using a binder film according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: slurry 2, 13: film

3: sheet 4, 21, 22: layer

5: bar 8: glue

11: binder solution 12: jig

14: binder film

The present invention relates to an interlayer lamination method using a binder film, and more particularly, in order to prevent delamination generated in a plurality of interlayers in a low temperature cofired ceramics (LTCC) process, a binder solution is printed between layers to be laminated. It relates to an interlayer lamination method using a binder film to increase the interlayer bonding force by inserting the film.

In the wireless communication field, ceramic parts that can be used in a high frequency band and have various functions and small sizes are used. The ceramic parts are mainly manufactured by a low temperature cofired ceramics (LTCC) process fired at a low temperature based on a lamination technology. Are manufactured.

FIG. 1 is a flowchart illustrating a general LTCC process. A green sheet is obtained by applying a slurry 1 mixed with a glass and a ceramic mixed powder, an organic binder, a dispersant, and the like to a carrier film 2 such as a mylar film. (green sheet) 3 is cast, and the casted green sheet 3 is cut to the desired size. The plurality of cut green sheets 3 are compressed at low pressure to form a single layer 4, and a single layer 4 of the plurality of green sheets 3 includes a circuit pattern or an electrode. Is printed.

Each layer on which the circuit pattern or electrode is printed is laminated and compressed in a bar shape, and the compressed bar 5 is cut into chips 6 and then cooled at a low temperature (approximately 850 ° C.). Calcined).

FIG. 2 is a cross-sectional view showing an interlayer lamination method using a conventional adhesive. Referring to FIG. 2, a conventional adhesive 8 is printed on a first layer 4a to be laminated using a roller 7. The second layer 4b is laminated on the upper surface of the first layer 4 on which the adhesive 8 is printed. When the first layer 4a and the second layer 4b are laminated with the adhesive 8 therebetween, pressure is applied to the first layer 4a and the second layer 4b by pressing them.

However, when the adhesive 8 is printed between the layers 4 by using the roller 7, the adhesive 9 is unevenly printed in the related art so that the interlayer thickness becomes uneven or the interlayer pores occur during the pressing process. There is a problem.

When the interlayer thickness is uneven or interlayer pores are generated during the pressing process, the interlayer adhesion is weakened, and delamination occurs in which the upper layer and the lower layer are separated during the subsequent firing process. Furthermore, when the foliar phenomenon occurs, the final product chip has a problem in that it is defective.

The present invention is a means for solving the above-described problems, the object of the present invention is to increase the interlayer bonding force of the layers laminated in the Low Temperature Cofired Ceramics (LTCC) process to prevent delamination, the binder between the laminated layers It is to provide an interlayer lamination method using a binder film for inserting and compressing a component printed film.

As a means for achieving the above object, the method of the present invention in the interlayer lamination method using a binder film in the LTCC process of laminating a plurality of layers and firing at low temperature

Manufacturing a binder film by printing a binder solution on the film;

Stacking the binder film such that the binder solution contacts an upper surface of at least one first layer of the plurality of layers;

Pressing the binder film in the direction of the first layer;

Removing only a film portion of the binder film; And

Stacking and compressing a second layer on the first layer to which the binder solution is applied

It provides an interlayer lamination method using a binder film, characterized in that consisting of.

The manufacturing of the binder film may include selecting a binder resin, selecting a solvent, mixing the selected binder resin and the selected solvent to prepare a binder solution, and forming the binder solution into a film. Casting to to produce a binder film.

In the step of selecting the binder resin, the binder resin of the present invention is cellulose, cellulose, ethyl cellulose, polyvinyl butyral (PVB), polymethyl methacrylate (polymethyl methacrylate: PMMA), polyacrylate esters, or a mixture of two or more thereof.

In one embodiment of the present invention, the polyvinyl butyral may be selected and used as the binder resin.

In the step of selecting the solvent, the solvent of the present invention is methyl ethyl ketone (ethyl ethyl ketone), ethyl alcohol (ethyl alcohol), isopropyl alcohol (isopropyl alcohol), toluene, diethyl ether It may be selected as a single solvent or two or more mixed solvents, such as trichloro ethylene, methanol (methanol).

In the embodiment of the present invention, when the polyvinyl butyral is selected as the binder resin, a mixed solvent in which toluene and ethyl alcohol are mixed may be selected as the solvent. Preferably the mixing ratio of the toluene and ethyl alcohol of the mixed solvent may be 60wt%: 40wt%.

As such, a feature of the present invention is that instead of the conventional glue printed by an interlayer roller to increase the adhesion when laminating the plurality of layers, the binder film produced as described above is replaced with the plurality of interlayers. It is inserted to laminate the plurality of layers.

Hereinafter, an interlayer lamination method using a binder film according to the present invention will be described with reference to the accompanying drawings.

FIG. 3 is a manufacturing process diagram of a binder film, and a process of manufacturing the binder film of the present invention will be described with reference to FIG. 3.

When selecting the binder resin and the solvent to be implemented in the present invention among the various binder resins and solvents described above, the binder resin and the solvent are selected to have high meltability. When the binder resin and the solvent are selected as described above, the binder resin and the solvent are mixed to form a binder solution 11. Preferably, the mixing ratio of the binder resin and the solvent of the binder solution 11 may be 1:10 based on the weight.

In the embodiment of the present invention, the binder resin may be selected from polyvinyl butyral (PVB), and the solvent may be selected from a mixed solvent in which toluene and ethyl alcohol are mixed. have. Preferably, the mixing ratio of toluene and ethyl alcohol of the mixed solvent may be 60wt%: 40wt%.

After the binder solution 11 mixed with the binder resin and the solvent selected as described above is charged into the jig 12 having the hole 12a, the jig 12 into which the binder solution 11 is loaded is filmed. The binder solution 11 is casted on the film 13 while moving in the longitudinal direction of (13) to produce a binder film 14. The binder film 14 produced as described above is cut according to a plurality of layer areas to be laminated.

4A to 4E are cross-sectional views of the interlayer lamination method using the binder film according to the present invention. The interlayer lamination method using the binder film of the present invention will be described with reference to Figs. 4A to 4E.

At least one binder film 14 prepared as described above is laminated on an upper surface of the first layer 21 of the plurality of layers. In this case, as shown in FIG. 4A, the binder film 14 is stacked such that the binder solution 11 is in contact with the top surface of the first layer 21.

When the binder film 14 is stacked, as shown in FIG. 4B, the binder solution 11 of the binder film 14 is slightly pressed to uniformly adhere to the top surface of the first layer 21. When the pressing is completed, as shown in Figure 4c, only the film 13 of the binder film 14 is removed.

In the present invention, by repeating the process of laminating the binder film 14 on the upper surface of the first layer 21 and removing only the film 13 of the binder film 14, the binder solution 11 at least once. ) May be applied to the upper surface of the first layer 21.

As the number of times the binder solution 11 is applied increases, the firing temperature may increase or the firing time may increase in a subsequent firing process.

When the film 13 is removed, as shown in FIG. 4D, the second layer 22 is laminated and pressed on the upper surface of the first layer 21 to which the binder solution 11 is applied.

By repeating the above process, the plurality of layers may be laminated and compressed in the form of a bar shown in FIG. 4E.

5 is a flowchart showing an interlayer lamination method using a binder film according to the present invention.

First, a binder resin and a solvent are selected (S101), and the binder resin and the solvent are mixed to prepare a binder solution 11 (S102). As shown in FIG. 3, after the binder solution 11 is charged into the jig 12, the binder solution 11 is cast into the film 13 through the holes 12a of the jig 12. The binder film 14 is produced (S103).

The binder film 14 manufactured as described above is laminated on the first layer 21 such that the binder solution 11 contacts the upper surface of the first layer 21 (S104). After the laminated binder film 14 is pressed to be applied to the upper surface of the first layer 21 (S105), only the film 13 of the binder film 14 is removed (S106).

The second layer 22 is laminated on the upper surface of the first layer 21 with the binder solution 11 from which the film 13 is removed (S107). The first layer 21 and the second layer 22 are compressed to have a bar shape shown in FIG. 4D (S108).

By repeating the above process, the present invention can stack a plurality of layers in a bar shape as shown in FIG. 4E.

As described above, in the present invention, by stacking a plurality of layers using the binder film, the interlayer bonding force is increased in a firing process of baking the stacked bars or the chips from which the bars are cut at a low temperature. No delamination occurs. Therefore, the probability that a defect occurs in the chip which is the final product is reduced.

According to the present invention, by inserting a binder film between a plurality of layers to stack a plurality of layers, the stacked plurality of interlayer binder solutions are uniformly applied to increase the interlayer bonding force.                     

In addition, it is possible to prevent the delamination phenomenon occurring after the firing process by increasing the interlayer bonding force, and to reduce the incidence of defects caused by the foliation phenomenon in the chip, which is the final product.

Claims (7)

In the interlayer lamination method using a binder film in the LTCC process of laminating a plurality of layers and firing at low temperature, Manufacturing a binder film by printing a binder solution on the film; Stacking the binder film such that the binder solution contacts an upper surface of at least one first layer of the plurality of layers; Pressing the binder film in the direction of the first layer; Removing only a film portion of the binder film; Stacking and compressing a second layer on the first layer to which the binder solution is applied An interlayer lamination method using a binder film, characterized in that consisting of. The method of claim 1, wherein the manufacturing of the binder film Selecting a binder resin; Selecting a solvent; Preparing a binder solution by mixing the selected binder resin and the selected solvent; And Preparing a binder film by casting the binder solution on a film; An interlayer lamination method using a binder film, characterized in that consisting of. The method of claim 2, wherein the binder resin is cellulose, cellulose, ethyl cellulose, polyvinyl butyral (PVB), polymethyl methacrylate (PMMA), polyacrylic ester Interlayer lamination method using a binder film, characterized in that one or more mixtures selected from (polyacrylate esters). The method of claim 2, wherein the solvent is methyl ethyl ketone, ethyl alcohol, isopropyl alcohol, toluene, diethyl ether, trichloro ethylene An interlayer lamination method using a binder film, characterized in that a single solvent or two or more mixed solvents, such as ethylene) and methanol. The method of claim 5, wherein the solvent is 60 wt% toluene and 40 wt% ethyl alcohol. 7. The method of claim 2, wherein the binder solution has a mixing ratio of the binder resin and the solvent in a ratio of 1:10 based on the weight. The method of claim 1, wherein the binder solution is applied to the upper surface of the first layer at least once or more times.

Images