TWI727934B - Manufacturing method of ceramic composite sheet - Google Patents

Abstract

The invention provides a method for manufacturing a ceramic composite sheet. After firing a ceramic green sheet of a predetermined shape to form a fired ceramic layer, a resin layer is attached to at least one surface of the fired ceramic layer via an adhesive layer to form a ceramic composite sheet. The fired ceramic layer and the resin layer are simultaneously cut into the desired shape. The adhesive peeling member having the adhesive peeling surface is pressed against the cut surface exposed in the cutting step, and the ceramic fragments present on the cut surface are removed.

Description

Manufacturing method of ceramic composite sheet

The present invention relates to a manufacturing method of a ceramic composite sheet. In more detail, in the ceramic composite sheet that can be attached to the flat, curved, or convex-concave surface of the electronic device, and can be peeled off from the flat, curved, or convex-concave surface of the electronic device, the cut is removed Ceramic fragments on the cut surface are used to make ceramic composite sheets.

In order to absorb electromagnetic waves radiated from electronic equipment and to absorb electromagnetic waves entering electronic equipment and the like, it is generally the case that ceramic composite sheets are mounted on the electronic equipment and the like. The ceramic composite sheet is made by bonding a thin film (resin layer) to an amorphous magnetic body, a fired ferrite magnetic body, a composite magnetic body formed of a magnetic powder such as ferrite and a binder resin, and a fired ferrite It is constructed on a magnetic body such as a body. Particularly, in the case of a radio frequency identification (RFID: Radio Frequency Identification) tag that uses an antenna coil to communicate with electromagnetic waves, it is difficult to transmit and receive signals when there is a conductive member like a metal near the antenna coil, for example on the back side. In order to improve communication sensitivity, a ceramic composite sheet with high permeability is arranged between the antenna coil and the conductive member of the RFID tag.

As mentioned above, the FPC and other flexible electronic materials are made into a planar shape to make an antenna, and then a ceramic composite sheet is mounted on the antenna substrate to reduce the influence of metal in the electronic device and obtain good communication characteristics. Sex. In this case, in order to attach according to the unevenness of the attaching part, the following methods are generally adopted. That is, the fired ceramic layer is divided into small pieces, and then used as a soft sheet. In addition, in order to prevent the divided pieces from separating and prevent powder falling from the divided parts (here, "fluttering" refers to the separation of fine powder such as ceramic fragments and falling), a resin film with an adhesive layer ( After the resin layer is attached to the two surfaces of the fired ceramic layer, the fired ceramic layer is divided into small pieces. In this way, powder falling from the cut surface of the small piece can be prevented (see, for example, Patent Document 1).

On the other hand, due to the size limitation of the ceramic composite sheet when it is installed in the equipment, its shape needs to be processed to be the same as the outer peripheral shape of the antenna substrate. In some cases, the ceramic composite sheet needs to be processed. Punch through holes and other cutting steps on the inside. In this case, since the resin film provided with the adhesive layer is bonded to both surfaces of the fired ceramic layer, the cross section (cut surface) of the resin layer and the fired ceramic layer will be exposed with cutting or the like. As a result, the following phenomena appear on the exposed cut surface. Fragments of the cut ceramic particles (hereinafter referred to as "ceramic fragments") are about to detach and remain on the ceramic layer of the cut surface, or the detached ceramic fragments adhere to the adhesive layer. These ceramic fragments will fall off inside the loaded electronic device (hereinafter referred to as "powder falling") phenomenon, which is the problem.

Therefore, as a method of preventing powder falling from the cut surface, it is conceivable to attach a protective material such as a resin film to the cut surface. However, if it is a complicated cutting surface, the steps for attaching the protective material will become complicated, and the number of working hours will be greatly increased, which lacks practicality. Moreover, if the adhesion of the protective material is rough and rough, it will be removed from the part where the protective material has not yet been attached. Powder falling of ceramic fragments occurred.

[Prior Technical Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2005-15293.

In the technical content disclosed in the above-mentioned conventional patent document 1, a laminated layer composed of a resin layer and an adhesive layer, such as a double layer, is provided on the surface of the fired ceramic layer on which the attracting groove is formed, or on the opposite side thereof. Face tape. Furthermore, a protective layer for preventing powder falling is provided on the surface opposite to the surface on which the build-up layer is formed. As a result, since the protective layer exists on the dividing surface divided along the attracting groove, it is possible to prevent the ceramic fragments from falling off. However, in the case of cutting the ceramic composite sheet into the desired shape with a punch, cutting knife, etc., in the case of punching a hole in a part of the ceramic composite sheet with a punch, or in the case of cutting with a Thomson die Or in the case of cutting with laser light, since the fired ceramic layer will be exposed, there is a high possibility that ceramic fragments will fall on the cut surface.

That is, because it is a ceramic composite sheet with a resin layer pasted on at least one surface of the fired ceramic layer via an adhesive layer, the following situation may occur. The ceramic fragments that are about to leave the cut surface of the fired ceramic layer The ceramic composite sheet will fall into the product when it is installed in a portable terminal or other products, or the ceramic fragments that have separated from the cut surface of the fired ceramic layer will temporarily adhere to the adhesive layer and remain. The ceramic fragments will remain during the use of the product. Will fall into the product. The above powder falling is a big problem.

The present invention has been completed in view of the above points. The purpose is to It reliably prevents powder falling on the exposed cutting surface of the ceramic composite sheet.

To achieve the above object, in the present invention, the adhesive release member is pressed against the exposed cut surface of the ceramic composite sheet, and the ceramic fragments remaining on the cut surface of the ceramic composite sheet are forcibly removed in advance.

Specifically, the manufacturing method of the ceramic composite sheet of the present invention includes a firing step, an attaching step, a cutting step, and a removing step. In this firing step, a ceramic green sheet of a predetermined shape is fired to form a fired ceramic layer. In this attaching step, a resin layer is attached to at least one surface of the fired ceramic layer via an adhesive layer to form a ceramic composite sheet. In this cutting step, the fired ceramic layer and the resin layer are simultaneously cut into a desired shape. In this removing step, the adhesive peeling member having an adhesive peeling surface is pressed against the cut surface exposed in the cutting step, and the ceramic fragments present on the cut surface are removed.

According to this configuration, the ceramic fragments that have separated from the fired ceramic layer or are about to be separated from the fired ceramic layer can be removed by the removing step. Therefore, when it is put into the product, it is possible to greatly reduce the separation of ceramic fragments from the ceramic composite sheet. The occurrence of undesirable phenomena caused by falling into the product.

In this way, in the method of manufacturing the ceramic composite sheet of the present invention, the adhesive force of the adhesive release surface is stronger than the adhesive force of the adhesive layer. In the removing step, the adhesive release surface is pressed against the fired ceramic layer, the resin layer, and the adhesive layer.

According to this structure, the adhesive force of the adhesive peeling surface of the adhesive peeling member is stronger than the adhesive force of the adhesive layer, so even if the ceramic fragments are separated from the fired ceramic When the ceramic layer is attached to the adhesive layer, the ceramic fragments can also be removed.

In this way, in the method of manufacturing a ceramic composite sheet of the present invention, in the removing step, the ceramic fragments are attracted from the cut surface by a suction means.

According to this structure, the ceramic fragments can be reliably removed.

In this way, in the method of manufacturing a ceramic composite sheet of the present invention, in the removing step, a plurality of ceramic composite sheets are stacked so that the cut surface is aligned, and the adhesive release member is simultaneously pressed against the plurality of ceramic composite sheets. Each of the cutting surface.

According to this structure, it is possible to simultaneously perform the removal step for a plurality of ceramic composite sheets, so that productivity can be improved. In particular, it is easy to handle when stacking thin ceramic composite sheets. In addition, when a plurality of ceramic composite sheets are laminated, the thickness of the cut surface is increased, and the cut surface is difficult to deform, so the adhesive peeling member can be reliably pressed on the cut surface.

In this way, the method for manufacturing a ceramic composite sheet of the present invention may further include a brushing step of brushing the cut surface and then removing the ceramic fragments before the removing step.

According to this configuration, since the easily detached ceramic fragments and the like can be removed first, the ceramic fragments and the like to be removed in the removal step can be reduced, and the ceramic fragments and the like can be easily and reliably removed. In particular, since ceramic fragments and the like attached to the adhesive peeling surface of the adhesive peeling member are reduced by one pressing, the number of uses of the adhesive peeling member can be increased without frequent replacement. As a result, workability is improved.

It can be so, in the method of manufacturing the ceramic composite sheet of the present invention, The brushing in the brushing step is performed by relative movement in directions different from the two directions in the direction in which the plurality of ceramic composite sheets are stacked and the direction at right angles to the direction.

According to this structure, the ceramic fragments and the like can be easily removed, and the ceramic fragments and the like can be removed without being sandwiched between the ceramic composite sheets.

This may be the case. In the method for manufacturing a ceramic composite sheet of the present invention, the removing step includes inspecting the adhesion state of the ceramic fragments on the adhesive peeling member pressed on the cut surface, and judging whether or not according to the inspection result The step of further pressing the adhesive peeling member.

According to this structure, the ceramic fragments can be removed in accordance with the generation situation of the ceramic fragments and the like, and wasteful work is not performed.

According to the present invention, since the ceramic fragments can be removed, it is possible to greatly reduce the occurrence of defects caused by the ceramic fragments and the like being separated from the ceramic composite sheet and falling into the product when the ceramic fragments are put into the product.

1: Resin film

2: ceramic blank

2a, 2b: lure slot, dividing line

2c: small piece

3: Firing the ceramic layer

3a: cutting surface

3b: end face

4: Resin layer

4a: cutting surface

5: Adhesive layer

5a: cutting surface

6: Layered layers

7: protective layer

8: Peel off the sheet

10: Ceramic composite sheet

11: Cutting surface

S: ceramic fragments

21: Adhesive peeling parts

21a: Adhesive peeling surface

22: Attraction

25: Inspection means

26: Judgment

60: Dividing device

61: The first roll

62: second roll

70: Dividing device

71: upper die

72: Lower die

73: Compression die

A: Arrow

S1~S8, S8a: steps

Fig. 1 is a cross-sectional view showing a part of a ceramic composite sheet according to the first embodiment of the present invention.

2 is a plan view showing the divided state of the fired ceramic layer of the ceramic composite sheet according to the first embodiment of the present invention.

Fig. 3 is a flowchart showing the method for manufacturing a ceramic composite sheet according to the first embodiment of the present invention.

Fig. 4 is a conceptual diagram showing a dividing step of dividing the fired ceramic layer of the ceramic composite sheet of the first embodiment of the present invention into small pieces.

Fig. 5 is a conceptual diagram showing a cutting step of cutting the ceramic composite sheet of the first embodiment of the present invention into a desired shape.

Fig. 6 is a conceptual diagram showing the steps of pressing the adhesive material on the cut surface of the ceramic composite sheet according to the first embodiment of the present invention.

Fig. 7 is a diagram showing a method of manufacturing a ceramic composite sheet according to the first embodiment of the present invention.

Fig. 8 is a diagram showing a method of manufacturing a ceramic composite sheet according to the first embodiment of the present invention.

Fig. 9 is a diagram showing a method of manufacturing a ceramic composite sheet according to the first embodiment of the present invention.

Fig. 10 is a diagram showing a method of manufacturing a ceramic composite sheet according to the first embodiment of the present invention.

Fig. 11 is a flowchart showing a method of manufacturing a ceramic composite sheet according to the second embodiment of the present invention.

Fig. 12 is a flowchart showing a method of manufacturing a ceramic composite sheet according to a third embodiment of the present invention.

Fig. 13 is a schematic diagram showing a brushing step of the end face of the ceramic composite sheet according to the third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following descriptions of the preferred embodiments are merely illustrative of essential examples, and are not intended to limit the present invention, its applicable objects, or its uses.

[First Embodiment]

Figure 1 shows the ceramic composite related to the first embodiment of the present invention A cross-sectional view of a part of the sheet. The ceramic composite sheet of the first embodiment will be described with reference to FIG. 1.

The ceramic composite sheet 10 has a laminated structure. Specifically, an adhesive layer 5 is laminated on one side (lower side in FIG. 1) of the fired ceramic layer 3 having a predetermined shape (for example, rectangular), and a resin layer is laminated on the surface side of the adhesive layer 5 4. Another adhesive layer 5 is laminated on the surface side of the resin layer 4, thereby constituting the laminated layer 6. Furthermore, a release sheet 8 is laminated on one side of the laminated layer 6, and a resin layer 4 is laminated on the other side (upper side in FIG. 1) of the fired ceramic layer 3 via an adhesive layer 5. Thus, the protective layer 7 is formed. In addition, for ease of description, in the cross-sectional view of FIG. 1, the thickness of each layer is exaggeratedly displayed compared with the actual thickness.

As the ceramic material forming the fired ceramic layer 3, a known material such as ferrite can be used. The ferrite is not particularly limited as long as it is a soft ferrite. A well-known soft ferrite can be used. For example, the following known soft ferrites can be cited: Mn-Zn ferrite, Ni-Zn ferrite, Ni-Zn-Cu ferrite, Mn-Mg ferrite, Li ferrite, and the like. Furthermore, it is also possible to use soft ferrite whose composition is changed according to the frequency of the electromagnetic wave used.

The thickness of the fired ceramic layer 3 is 0.01 to 5 mm, preferably 0.02 to 3 mm, and more preferably 0.03 to 1 mm. When the thickness is less than 0.01 mm, it is difficult to handle as a sheet, which may lead to poor yield in the manufacturing operation of the ceramic composite sheet 10. When it exceeds 5 mm, the weight of the fired ceramic layer 3 increases, which is not preferable.

An example of the build-up layer 6 in which the resin layer 4 and the adhesive layer 5 are integrated, for example It is a double-sided tape. The double-sided tape is not particularly limited, and a known double-sided tape can be used. As the build-up layer 6, one surface of the fired ceramic layer 3 may be laminated in this order with an adhesive layer 5, a bendable and stretchable resin layer (resin film or sheet) 4, an adhesive layer 5, and a release sheet 8 becomes.

As the protective layer 7 provided on the surface of the fired ceramic layer 3 opposite to the surface on which the build-up layer 6 is formed, the fired ceramic layer 3 is divided into small pieces 2c by dividing lines 2a and 2b. (All refer to FIG. 2) In the case of the resin, it is only necessary to form a resin that can be stretched without breaking, and there is no particular limitation. A well-known single-sided tape can be used. For example, polyester film tape, etc. The thickness of the protective layer 7 is 0.001 to 0.2 mm, preferably 0.005 to 0.15 mm, and more preferably 0.01 to 0.1 mm. When the thickness of the protective layer 7 is less than 0.001 mm, it is easy to break and it is difficult to prevent powder falling. In the case of more than 0.2mm, since the effect of preventing powder falling is saturated, there is no need to make the thickness more than 0.2mm.

The bonding method of the build-up layer 6 and the protective layer 7 provided on both sides of the fired ceramic layer 3 is not particularly limited. The build-up layer 6 may be provided on both sides of the fired ceramic layer 3, and the protective layer 7 may be provided on both sides of the fired ceramic layer 3.

As shown in Fig. 2, there are cases in which an attracting groove 2a and an attracting groove 2b are formed in advance on one surface of the ceramic green sheet 2 before firing. In this case, since the attracting groove 2a and the attracting groove 2b become the dividing line 2a and the dividing line 2b, the attracting groove 2a and the attracting groove 2b may be grooves that induce cracks along the dividing line 2a and the dividing line 2b. There are no particular restrictions on its shape and size (depth). Moreover, the attracting groove 2a and the attracting groove 2b may be continuous grooves or discontinuous grooves, and their distribution shape may be a checkerboard lattice shape or other shapes. shape. For example, the attracting groove 2a and the attracting groove 2b disclosed in Japanese Patent Application Laid-Open No. 2005-15293 etc. can be used. Therefore, the lure slot will not be described in detail here. The cross-sectional shape of the attraction groove 2a and the attraction groove 2b is not particularly limited as long as the fired ceramic layer 3 can be divided by the attraction groove 2a and the attraction groove 2b.

Preferably, the protective layer 7 has the following functions. That is, the fired ceramic layer 3 can be divided by the attracting groove (parting line) 2a and the attracting groove (parting line) 2b, so that the fired ceramic layer 3 has bendability, and the magnetic permeability when the fired ceramic layer 3 is cracked Reduced too much. In particular, as long as the protective layer 7 is made of resin that will not break and extend even if the fired ceramic layer 3 is folded outward with the attracting groove 2a and the attracting groove 2b and divided by the dividing line 2a and the dividing line 2b It is not particularly limited as long as it is formed. By forming the protective layer 7 on the surface of the fired ceramic layer 3 provided with the attracting groove 2a and the attracting groove 2b, it is possible to prevent the fired ceramic layer 3 from being caught by the attracting groove (partition line) 2a and the attracting groove (partition line) 2b. The powder falling in the case after division results in a further improvement in reliability and durability.

Next, a method of manufacturing the ceramic composite sheet 10 of the present invention will be described with reference to FIGS. 3 and 7 to 10.

As shown in FIGS. 7 to 10, in the method of manufacturing the ceramic composite sheet 10 of the present invention, first, the ceramic green sheet 2 obtained on a resin film 1 such as PET is cut into a predetermined shape, and then the resin film 1 The ceramic green sheet 2 is obtained by peeling off. Next, as shown in FIG. 10, the ceramic green sheet 2 is fired and used as the fired ceramic layer 3, and the above-mentioned build-up layer 6 and the protective layer 7 are laminated on both sides of the fired ceramic layer 3 to obtain Ceramic composite sheet 10. After that, the ceramic composite sheet 10 obtained by bonding the build-up layer 6 and the protective layer 7 The fired ceramic layer 3 is divided into small pieces, and the ceramic composite sheet 10 is cut into a desired shape by mechanical equipment such as a press or laser light according to the purpose of use, the product used, and the like. Then, the adhesive peeling member 21 is pressed against each cut surface exposed by the cutting, and the separable ceramic fragments S and the like are removed.

More specifically, first, as shown in FIG. 7, a ceramic green sheet 2 is formed on the resin film 1 (step S1).

In addition, the ceramic green sheet 2 can be manufactured by a known method. For example, after mixing the ceramic powder, the binder resin, and the solvent, the mixture is coated on the resin film (or resin sheet) 1 with a doctor blade or the like to obtain a ceramic green sheet 2.

The ceramic green sheet 2 can be formed into a predetermined size and shape in advance. In this case, it is not necessary to cut it before firing. It can also be used as a continuous ceramic green sheet 2 after being formed, and then cut into a predetermined size and shape to be used as the ceramic green sheet 2. In this case, it is only necessary to cut the ceramic green sheet 2 into a predetermined size and shape before performing the firing treatment. Cutting can be carried out no matter after step S1 or after step S2 described later, and cutting can also be carried out in two steps of step S1 and step S2.

After mixing the ceramic powder, the binder resin, and the solvent, the ceramic green sheet 2 can be obtained by powder compression molding, injection molding, calendering, and extrusion. In addition, the ceramic green sheet 2 can also be degreased as needed.

Next, as shown in FIG. 8, an attracting groove 2a and an attracting groove 2b are formed on one surface of the ceramic green sheet 2 (step S2). It becomes a crack (parting line). As shown in Fig. 2, the attracting grooves 2a and 2b are formed in a crisscrossed grid shape. The attracting groove 2a and the attracting groove 2b are formed by pushing a shaped knife or the like corresponding to the attracting groove 2a and the attracting groove 2b.

As described later, after the ceramic green sheet 2 is fired to form the fired ceramic layer 3, the fired ceramic layer 3 is divided along the attracting groove 2a and the attracting groove 2b, and the attracting groove 2a becomes the dividing line 2a. In line 2b, the fired ceramic layer 3 is divided into a large number of small pieces 2c.

The attracting groove 2a and the attracting groove 2b can be formed during the forming process of the ceramic green sheet 2, after forming, or after firing treatment. For example, in the case of forming the attracting groove 2a and the attracting groove 2b by a powder compression molding method or an injection molding method, it is preferable to form the grooves during the molding process of the ceramic green sheet 2. In the case of forming the attracting grooves 2a and 2b on the ceramic green sheet 2 formed on the resin film 1 by calendering, extrusion, or coating with a doctor blade, it is preferable to form the ceramic green sheet 2 and to Before the ceramic green sheet 2 is fired, a groove is formed.

In addition, in this embodiment, the attracting groove 2a and the attracting groove 2b are formed, but this step can be omitted. In particular, when the ceramic green sheet 2 is very thin, the attracting groove 2a and the attracting groove 2b are omitted and can be divided into small pieces 2c.

Next, as shown in FIG. 9, the resin film 1 is peeled off from the ceramic green sheet 2 obtained in step S2 to be a sheet having only the ceramic green sheet 2 (step S3). In the firing step described later, the resin film 1 is useless, so the resin film 1 is removed in this step.

Next, the ceramic green sheet 2 obtained in step S3 is put into a heating furnace for firing treatment, thereby manufacturing a fired ceramic layer 3 (step S4). The Step S4 is a well-known step and is a method disclosed in Japanese Patent Application Laid-Open No. 2005-15293 etc., so the detailed description is omitted. In addition, here, instead of stacking the ceramic green sheets 2, only one ceramic green sheet 2 is continuously fed into the heating furnace and heat-treated. However, it is also possible to stack a plurality of ceramic green sheets for processing.

Next, as shown in FIG. 10, a build-up layer 6 (for example, a double-sided tape) in which the resin layer 4 and the adhesive layer 5 are integrated is placed on the fired ceramic layer 3 obtained in step S4 where the attracting groove 2a, A protective layer 7 for preventing powder falling is formed on the surface opposite to the surface of the attracting groove 2b, and on the surface opposite to the surface on which the build-up layer 6 is formed (step S5).

A film or sheet of PET resin or the like forming the protective layer 7 is adhered to the surface of the fired ceramic layer 3 via an adhesive material, thereby forming the protective layer 7. Alternatively, a paint containing a resin that forms the protective layer 7 is coated on the surface of the fired ceramic layer 3 to form the protective layer 7.

Specifically, a laminating process is performed, and a resin film (laminated layer 6 formed by providing the adhesive layer 5 on the resin layer 4) is attached to one surface of the fired ceramic layer 3. In addition, as shown in FIG. 1, the release sheet 8 is bonded to the surface side of the build-up layer 6 with the adhesive layer 5 interposed therebetween in a peelable state. Furthermore, the protective layer 7 is bonded to the other surface sandwiching the fired ceramic layer 3.

This can be done in this step S5. That is, from the viewpoint of preventing the end surface 3b (see FIG. 10) of the fired ceramic layer 3 from being exposed, the laminated layer 6 and the protective layer 7 are composed of thin film sheets larger than the fired ceramic layer 3, and as shown in FIG. The inner surface of the layer 6 and the inner surface of the protective layer 7 are in contact with each other and overlapped to perform bonding, and the fired ceramic layer 3 is surrounded by the build-up layer 6 and the protective layer 7. In addition, In the case where powder falling of the fired ceramic layer 3 can be prevented, it is not necessarily necessary to join the build-up layer 6 and the protective layer 7.

In this way, the ceramic composite sheet 10 is formed in which the resin layer is attached to both surfaces of the fired ceramic layer 3 with the adhesive layer 5 interposed therebetween.

In addition, the above is a configuration in which the build-up layer 6 and the protective layer 7 are provided on the surface of the fired ceramic layer 3. However, in addition to this, it can also be a structure in which the build-up layer 6 or the protective layer 7 is provided on only one surface of the fired ceramic layer 3, or the build-up layer 6 (or the protective layer 7) may be provided in the fired ceramic layer 3. The ceramic layer 3 has such a structure on both sides.

Next, the fired ceramic layer 3 of the ceramic composite sheet 10 obtained in step S5 is divided into small pieces 2c based on the dividing line 2a and the dividing line 2b (step S6). In addition, at this time, the build-up layer 6 and the protective layer 7 formed on one surface and the other surface of the fired ceramic layer 3 are not divided but remain as they are, and only the fired ceramic layer 3 is divided into small pieces 2c. With this configuration, the ceramic composite sheet 10 can be bent to change its shape in accordance with the unevenness of the surface of the target member to be bonded, and it is possible to prevent the small pieces 2c of the fired ceramic layer 3 from being separated into individual pieces.

For example, as shown in FIG. 4, the fired ceramic layer 3 is divided into small pieces 2c by the dividing device 60. More specifically, the ceramic composite sheet 10 is passed between a small-diameter metal roller (first roller 61) and a large-diameter resin roller (second roller 62), and the fired ceramic layer of the ceramic composite sheet 10 is divided into 3 For the small piece 2c.

In addition, in this embodiment, the fired ceramic layer 3 of the ceramic composite sheet 10 is divided into small pieces 2c for easy bending, but there are cases where it is not necessary to divide into small pieces 2c. In this case, step S6 can be omitted.

Next, the ceramic composite sheet 10 obtained in step S6 is cut into a shape corresponding to the attachment portion of the attachment object by a cutting means (a die, a cutting knife, a punching knife, a laser beam, etc.) (step S7) . That is, the fired ceramic layer 3 and the resin layer 4 are simultaneously cut into a desired shape. In particular, in the case of cutting by mechanical cutting means (punching dies, cutting knives, punching knives, etc.), there will be many ceramic fragments that have been separated from the exposed cutting surface or are about to be separated from the exposed cutting surface, so The effect of using the present invention is great. For example, as shown in FIG. 5, the cutting device 70 includes an upper mold 71, a compression mold 73 and a lower mold 72. In a state where the ceramic composite sheet 10 is sandwiched by the upper mold 71 and the pressing mold 73, and the lower mold 72 and the pressing mold 73, one of them is relatively moved to perform cutting. The cutting means disclosed in Japanese Patent Application Laid-Open No. 11-42629 can also be used.

In addition, compared with mechanical cutting, cutting with laser light can obtain a very smooth cutting surface, but it will also produce detached ceramic fragments, and ceramic fragments that are about to detach, although the amount is relatively small.

Next, as shown in FIGS. 1 and 6, the adhesive peeling member 21 is pressed on the cut surface 3a of the fired ceramic layer 3 obtained in step S7 of the ceramic composite sheet 10 and the cut surface 4a of the resin layer 4, and the bonding The cut surface 5a of the layer 5 and the cut surface of the protective layer 7, so that the ceramic fragments S, etc. attached to the adhesive layer 5 or about to be released (or detachable) are attached to the adhesive peeling surface 21a of the adhesive peeling member 21 Top and remove (step S8).

In addition, if not only the adhesive release surface 21a is pressed on the cut surface 3a of the fired ceramic layer 3, but also the adhesive release surface 21a is pressed on the cut surface 4a of the resin layer 4, the cut surface 5a of the adhesive layer 5, and the protective layer 7 cut surface Above, the ceramic fragments S and the like attached to the adhesive layer 5 after being separated from the fired ceramic layer 3 can also be removed. In particular, by using the adhesive peeling member 21 having a stronger adhesive force than the adhesive layer 5, the ceramic fragments S etc. attached to the adhesive layer 5 can be removed by adhesion, so the removal effect of the ceramic fragments S etc. improve.

In step S8, a plurality of ceramic composite sheets 10 are overlapped with the cut surfaces aligned, and then the adhesive peeling member 21 is pressed on each cut surface of the plurality of ceramic composite sheets 10 at the same time.

Compared with mechanical cutting, laser cutting can obtain a smoother cutting surface, but like mechanical cutting, there are separated ceramic fragments S, etc., and there are also a small amount of ceramic fragments S remaining in the cuts of some cutting surfaces. Situation. In this case, by pressing the adhesive peeling surface 21a on the cut surface 4a of the resin layer 4, the cut surface 5a of the adhesive layer 5, and the cut surface of the protective layer 7, the ceramic fragments S can also be removed.

In the case of cutting with laser light, sometimes the ferrite and resin sublimed by the heating and irradiation of the laser light may become carbon particles and remain on the cutting surface. Therefore, pressing the adhesive peeling surface 21a against the laser cut surface not only forcibly removes the ceramic fragments S but also forcibly removes the carbon particles adhering to the cut surface, so it can be said to be effective. In the present invention, these carbon fine particles are collectively referred to as ceramic chips and the like.

Preferably, in step S8, the suction means 22 such as vacuum air is brought close to the cutting surface 3a, the cutting surface 4a, and the cutting surface 5a to remove the ceramic fragments S and the like. In addition, it is preferable that the suction air system in this case is no longer static.

As shown in Fig. 6, this can be done in step S8, using inspection means 25 The adhesion state of the ceramic shards S and the like on the adhesive peeling member 21 pressed on the exposed cut surface 11 is inspected, and the judging means 26 determines whether or not to further press the adhesive peeling member 21 based on the inspection result. For example, the inspection means 25 may detect a state in which ceramic fragments S and the like adhere to the adhesive peeling surface 21a of the adhesive peeling member 21 and become dirty, or a state where the adhesive force is weakened. In addition, the judgment means 26 is not particularly limited, as long as it can make a judgment based on the inspection result of the inspection means 25 as to whether to continue using the adhesive peeling member 21 or to replace the adhesive peeling member 21. With this configuration, the ceramic fragments S and the like can be efficiently removed according to the generation conditions of the ceramic fragments S and the like, and the quality of the ceramic composite sheet 10 is stable.

From the viewpoint of cost reduction, the adhesive peeling member 21 can be replaced after a certain period of time. In the case where the operator manually presses the adhesive peeling member 21, the operator can visually judge the timing of replacing the adhesive peeling member 21.

In the case where the fired ceramic layer 3 is attached along the curved surface or convex and concave surface of the surface of the attached object, such as electronic equipment, electronic components, etc., the firing ceramic layer 3 takes the dividing line 2a and the dividing line 2b as the starting point When it is bent or folded, it will not split into various shapes at positions other than the dividing line 2a and the dividing line 2b. Moreover, in this case, powder falling will not occur. Needless to say, the plane is the cylindrical side curved surface and the somewhat uneven surface, which can also make the ceramic composite sheet adhere to or substantially adhere to it. In the present invention, at the stage before being attached to the adherend, it is possible to detach the ceramic composite sheet 10 from the cut surface 11 or already attached to the adhesive. The ceramic fragments S and the like on the laminated layer are removed, so the phenomenon of powder falling of the ceramic fragments S will not occur, and the powder falling of the ceramic fragments S etc. can be prevented.

[Second Embodiment]

Next, a second embodiment of the present invention will be described with reference to FIG. 11. In addition, only the differences from the first embodiment will be described. The second embodiment is a manufacturing method in which step S2 in the first embodiment is omitted. In particular, when the ceramic composite sheet 10 is very thin, it is an effective manufacturing method.

[Third Embodiment]

Next, referring to FIG. 12 and FIG. 13, a third embodiment of the present invention will be described. In addition, only the differences from the second embodiment will be described. Compared with the second embodiment, the third embodiment is a manufacturing method in which step S8a is added as a step before step S8. Step S8a belongs to a step of brushing the cut surface 11 of the ceramic composite sheet 10 before pressing the adhesive release member 21 on the cut surface 11 of the ceramic composite sheet 10. As shown in FIG. 13, in this step, for the two directions in which the ceramic composite sheets 10 are overlapped (up and down direction in FIG. 13) and a direction at right angles to the direction (left and right direction in FIG. 13), the two directions are toward and Brush in two different directions (arrow A). According to this configuration, the ceramic fragments S and the like can be easily removed, and the ceramic fragments S and the like are not sandwiched between the fired ceramic layers 3, that is, the ceramic composite sheet 10 can be removed, which is preferable.

When the brushing is performed, the cut surface 11 of the ceramic composite sheet can be brushed one by one, or several ceramic composite sheets can be overlapped and then rubbed together. Moreover, it can be brushed manually, or Use equipment to scrub. If brushing is performed, the ceramic fragments S and the like attached to the adhesive peeling surface 21a of the adhesive peeling member 21 will be reduced by one pressing, so the number of times the adhesive peeling member 21 is used increases, and the adhesive peeling member 21 does not need to be frequently applied. Replace it. As a result, workability is improved.

In addition, in the case where the cutting surface 11 has very little powder falling or the powder falling is not a problem, the brushing can be omitted.

The above-mentioned brushing can also be performed in the first embodiment.

(Industrial Utilization)

The invention is very useful for the manufacturing method of the ceramic composite sheet. The ceramic composite sheet can be attached to the flat surface, curved surface, or surface of the electronic device, and can be peeled off from the flat surface, curved surface, or surface of the electronic device.

S1~S8‧‧‧Step

Claims (4)

A method for manufacturing a ceramic composite sheet includes a firing step, an attaching step, a cutting step, and a removing step; in the firing step, a ceramic green sheet of a predetermined shape is fired to form a fired Into a ceramic layer; in the attaching step, a resin layer is attached to at least one surface of the fired ceramic layer via an adhesive layer to form a ceramic composite sheet; in the cutting step, the fired ceramic layer and the The resin layer is cut into the desired shape at the same time; and in the removal step, the adhesive peeling member with the adhesive peeling surface is pressed against the cut surface exposed in the cutting step, and the ceramic fragments present on the cut surface are pressed Removal; before the removal step, it is further provided with a brushing step of brushing the cut surface and removing the ceramic fragments; the brushing in the brushing step is directed to the direction in which the plurality of ceramic composite sheets are overlapped and the direction The direction at a right angle moves relative to the direction different from the two directions. The method for manufacturing a ceramic composite sheet according to claim 1, wherein in the removing step, the ceramic fragments are attracted from the cut surface by a suction means. The method for manufacturing a ceramic composite sheet according to claim 1, wherein in the removing step, a plurality of ceramic composite sheets are stacked with the cut surface aligned, and the adhesive peeling member is simultaneously pressed against the composite Each of the cut surfaces of several ceramic composite sheets. The method for manufacturing a ceramic composite sheet according to claim 1, wherein the removing step includes inspecting the adhesion state of the ceramic fragments on the adhesive peeling member pressed on the cut surface, and judging whether or not according to the inspection result The step of further pressing the adhesive peeling member.

Images