JPWO2016067616A1 - Manufacturing method of ceramic composite sheet - Google Patents

Abstract

A ceramic green sheet having a predetermined shape is fired to form a fired ceramic layer, and then a resin material layer is attached to at least one surface of the fired ceramic layer via an adhesive material layer to form a ceramic composite sheet. Cut the fired ceramic layer and the resin material layer into the desired shape at the same time, and press the adhesive release member with the adhesive release surface against the exposed cut surface in the cutting process to remove ceramic debris present on the cut surface To do.

Description

  The present invention relates to a method for producing a ceramic composite sheet. More specifically, in a fired ceramic composite sheet that can be attached to and peeled from a flat, curved, or uneven surface of an electronic device, a ceramic composite sheet is manufactured by removing ceramic fragments and the like on the cut surface. It relates to a manufacturing method.

  In general, an electronic device or the like absorbs electromagnetic waves radiated from the electronic device or absorbs electromagnetic waves that enter the electronic device. A ceramic composite sheet in which a film (resin material layer) is bonded to a magnetic body such as a composite magnetic body composed of a binder resin or sintered ferrite is mounted. In particular, in an RFID (Radio Frequency IDentification) tag that performs communication using electromagnetic waves using an antenna coil, transmission / reception becomes difficult when a conductive member such as metal is present in the vicinity of the antenna coil, for example, on the rear side. Therefore, in order to increase communication sensitivity, a ceramic composite sheet having a high magnetic permeability is disposed between the antenna coil of the RFID tag and the conductive member.

  In addition, as described above, the antenna is manufactured in a planar shape with a flexible electronic material such as FPC, and the influence of metal in the electronic device is reduced on the antenna substrate, and good communication characteristics can be obtained. Thus, a ceramic composite sheet is attached. In this case, in order to make it adhere according to the unevenness | corrugation of an attachment part, dividing | segmenting a baking ceramic layer into a strip and generally using as a flexible sheet | seat is performed. A resin film (resin material layer) having adhesive layers on both surfaces of the fired ceramic layer in order to prevent separation of the divided pieces and to prevent powder falling from the portions divided into pieces. After pasting, it is performed to divide into small pieces. Thereby, powder fall off from the cut surface of a thin piece can be prevented (for example, refer patent document 1).

  On the other hand, the ceramic composite sheet needs to be processed into the same shape as the outer peripheral shape of the antenna substrate due to size restrictions when incorporating it into the device, and in some cases, a cutting process such as punching a through hole inside May be required. In this case, since the resin film provided with the adhesive material layer is bonded to both surfaces of the fired ceramic layer, the sections (cut surfaces) of the resin material layer and the fired ceramic layer are exposed along with the cutting. As a result, broken ceramic particles (hereinafter referred to as “ceramic fragments”) come off on the exposed cut surface and remain or remain on the ceramic layer of the cut surface. There is a problem that a phenomenon of adhering to the layer occurs, and that these ceramic fragments fall off inside the incorporated electronic device (hereinafter referred to as “powder falling”).

  Therefore, as a method for preventing powder from falling off from the cut surface, a method of attaching a protective material such as a resin film to the cut surface can be considered, but if it is a complicated cut surface, the process of attaching the protective material is complicated. As a result, the number of man-hours is greatly increased, and practicality is lacking. In addition, if the protective material adheres poorly, ceramic pieces may fall off from the portion where the protective material is not attached.

JP 2005-15293 A

  In the above-mentioned conventional Patent Document 1, a laminated material layer composed of a resin material layer and an adhesive material layer, for example, a double-sided adhesive tape, is provided on the surface of the fired ceramic layer where the induction groove is formed or on the opposite surface. It is done. And the protective material layer for powder fall prevention is provided in the surface on the opposite side to the surface in which the laminated material layer is formed. Therefore, since the protective material layer is present on the divided surface divided along the attracting groove, the ceramic pieces are prevented from falling off. However, when this ceramic composite sheet is cut into a desired shape with a press die or a cutting blade, a part of the ceramic composite sheet is punched out with a punch, a hole is cut, a Thomson die is cut, or a laser is cut In such a case, the fired ceramic layer is exposed, and therefore, there is a high possibility that the ceramic fragments will fall off at the cut surface.

  That is, since the resin material layer is adhered to at least one surface of the fired ceramic layer via the adhesive material layer, the ceramic fragments that are coming off the cut surface of the fired ceramic layer are separated from the ceramic composite sheet. The ceramic debris that falls into the product during the assembly of the product to the mobile terminal or the like, or has detached from the cut surface of the fired ceramic layer, remains attached to the adhesive layer once. In some cases, the product falls and falls into the product, and these powders have become a big problem.

  This invention is made | formed in view of this point, The place made into the objective is to prevent the powder fall-off in the cut surface which the ceramic composite sheet exposed.

  In order to achieve the above object, in the present invention, an adhesive release member is pressed against the exposed cut surface of the ceramic composite sheet to forcibly remove ceramic debris remaining on the cut surface of the ceramic composite sheet in advance. did.

  Specifically, in the method for producing a ceramic composite sheet of the present invention, a ceramic green sheet having a predetermined shape is fired to form a fired ceramic layer, and at least one surface of the fired ceramic layer is interposed with an adhesive material layer. And laminating the resin material layer to form a ceramic composite sheet, the cutting step of simultaneously cutting the fired ceramic layer and the resin material layer into a desired shape, and the cut surface exposed in the cutting step, A removing step of pressing a pressure-sensitive adhesive release member having a pressure-sensitive adhesive surface to remove ceramic fragments present on the cut surface.

  According to this configuration, ceramic fragments that have come off or are likely to come off from the fired ceramic layer can be removed by the removal process. It is possible to greatly reduce the occurrence of malfunctions caused by falling on the screen.

  In the method for producing a ceramic composite sheet of the present invention, the adhesive force of the adhesive release surface is stronger than the adhesive force of the adhesive material layer, and in the removing step, the adhesive release surface is a fired ceramic layer, a resin material layer, and an adhesive material. It is good also as a structure pressed against a material layer.

  According to this configuration, since the adhesive force of the adhesive release surface of the adhesive release member is stronger than the adhesive force of the adhesive material layer, ceramic fragments and the like are detached from the fired ceramic layer and adhered to the adhesive material layer. Even ceramic debris can be removed.

  In the manufacturing method of the ceramic composite sheet of this invention, it is good also as a structure which attracts | sucks the ceramic fragment removed from a cut surface with a suction means in a removal process.

  According to this configuration, ceramic fragments can be reliably removed.

  In the method for producing a ceramic composite sheet of the present invention, in the removing step, a plurality of ceramic composite sheets are stacked with the cut surfaces aligned, and an adhesive release member is provided for each of the cut surfaces of the plurality of ceramic composite sheets. It is good also as a structure pressed simultaneously.

  According to this configuration, the removal process can be performed on a plurality of ceramic composite sheets at the same time, so that productivity can be improved. In particular, when thin ceramic composite sheets are stacked, the handling becomes easy. In addition, since a plurality of ceramic composite sheets are laminated, the thickness of the cut surface is increased and the cut surface is not easily deformed, so that the adhesive release member can be reliably pressed against the cut surface.

  In the manufacturing method of the ceramic composite sheet of this invention, it is good also as a structure further equipped with the brushing process of brushing a cut surface and removing a ceramic fragment before a removal process.

  According to this configuration, it is possible to first remove ceramic fragments and the like that easily come off, so that the number of ceramic fragments and the like to be removed in the removal process can be reduced, and the ceramic fragments and the like can be easily removed reliably. In particular, the number of times the adhesive release member is used can be increased and frequently replaced because ceramic debris that adheres to the adhesive release surface of the adhesive release member is reduced in a single pressing step. Since it is not necessary, workability is improved.

  In the method for producing a ceramic composite sheet according to the present invention, the brushing in the brushing step is relative to a direction in which a plurality of ceramic composite sheets are stacked and a direction perpendicular to the direction in a direction different from these two directions. It is good also as a structure performed so that it may move.

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

  In the method for producing a ceramic composite sheet of the present invention, in the removing step, the adhesion state of the ceramic fragments to the adhesive release member pressed against the cut surface is inspected, and further according to the inspection result, the adhesive release member It is good also as a structure provided with the process of determining whether or not is pressed.

  According to this configuration, the ceramic debris can be removed without waste according to the state of occurrence of the ceramic debris.

  According to the present invention, the ceramic fragments can be removed, so that when the ceramic fragments are incorporated into the product, the occurrence of problems caused by the ceramic fragments etc. coming off the ceramic composite sheet and falling into the product is greatly reduced. Can be reduced.

It is sectional drawing which shows a part of ceramic composite sheet in connection with Embodiment 1 of this invention. It is a top view which shows the division | segmentation state of the baking ceramic layer of the ceramic composite sheet of Embodiment 1 of this invention. It is a flowchart which shows the manufacturing method of the ceramic composite sheet of Embodiment 1 of this invention. It is a conceptual diagram which shows the division | segmentation process which divides | segments the baking ceramic layer of the ceramic composite sheet of Embodiment 1 of this invention into a strip. The conceptual diagram which shows the cutting process which cut | disconnects the ceramic composite sheet of Embodiment 1 of this invention to a desired shape is shown. It is the schematic of the process of pressing an adhesive material on the cut surface of the ceramic composite sheet of Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the ceramic composite sheet of Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the ceramic composite sheet of Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the ceramic composite sheet of Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the ceramic composite sheet of Embodiment 1 of this invention. It is a flowchart which shows the manufacturing method of the ceramic composite sheet of Embodiment 2 of this invention. It is a flowchart which shows the manufacturing method of the ceramic composite sheet of Embodiment 3 of this invention. It is the schematic of the brushing process of the end surface of the ceramic composite sheet of Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or its application.

[Embodiment 1]
FIG. 1 is a cross-sectional view showing a part of a ceramic composite sheet according to Embodiment 1 of the present invention. Based on FIG. 1, the ceramic composite sheet of Embodiment 1 is demonstrated.

  The ceramic composite sheet 10 includes a pressure-sensitive adhesive layer 5 on one surface (lower side in FIG. 1) of the fired ceramic layer 3 having a predetermined shape (for example, rectangular shape), and a resin material layer on the surface side of the pressure-sensitive adhesive layer 5. 4, and another adhesive material layer 5 is further laminated on the surface side of the resin material layer 4 to form a laminated material layer 6. Further, a release sheet 8 is laminated on the surface side of the laminated material layer 6, and a resin material layer 4 is laminated on the other (upper side in FIG. 1) via an adhesive material layer 5 to form a protective material layer 7. It has a laminated structure. In the cross-sectional view of FIG. 1, for convenience of explanation, the thickness of each layer is shown exaggerated from the actual thickness.

  As the ceramic material of the fired ceramic layer 3, a known material such as ferrite is used. The ferrite is not particularly limited as long as it is soft ferrite, and known soft ferrite can be used. For example, Mn—Zn ferrite, Ni—Zn ferrite, Ni—Zn—Cu ferrite, Mn—Mg ferrite, Li ferrite and the like can be mentioned. Also, soft ferrite whose composition is changed according to the frequency of the electromagnetic wave to be used can be used.

  The thickness of the fired ceramic layer 3 is 0.01 mm 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, handling as a sheet becomes difficult, and the yield in the manufacturing operation of the ceramic composite sheet 10 becomes poor. If it exceeds 5 mm, the weight of the fired ceramic layer 3 is undesirably increased.

  Examples of the laminated material layer 6 in which the resin material layer 4 and the adhesive material layer 5 are integrally provided include a double-sided adhesive tape. It does not restrict | limit especially as a double-sided adhesive tape, A well-known double-sided adhesive tape can be used. Also, as the laminated material layer 6, an adhesive material layer 5, a flexible and stretchable resin film (or sheet) 4, an adhesive material layer 5 and a release sheet 8 are sequentially laminated on one side of the fired ceramic layer 3. There may be.

  As the protective material layer 7 provided on the surface of the fired ceramic layer 3 opposite to the surface on which the laminated material layer 6 is formed, the fired ceramic layer 3 is separated into strips 2c (both see FIG. 2) at the dividing lines 2a and 2b. If it is made, it will not restrict | limit especially if it is resin extended without fracture | rupture, A well-known single-sided adhesive tape can be used. For example, a polyester film adhesive tape is mentioned. The thickness of the protective material 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 material layer 7 is less than 0.001 mm, it is easy to break and it is difficult to prevent powder falling. When the thickness exceeds 0.2 mm, the effect of preventing powder falling is saturated, so that it is not necessary to increase the thickness beyond 0.2 mm.

  The combination of the laminated material layer 6 and the protective material layer 7 provided on both sides of the fired ceramic layer 3 is not particularly limited. Moreover, the laminated material layer 6 may be provided on both sides of the fired ceramic layer 3, and the protective material layer 7 may be provided on both sides.

  As shown in FIG. 2, induction grooves 2a and 2b may be formed in advance on one surface of the ceramic green sheet 2 before firing. In this case, since the attraction grooves 2a and 2b become the dividing lines 2a and 2b, the attraction grooves 2a and 2b may be grooves that induce cracks along the dividing lines 2a and 2b. The depth (depth) is not particularly limited. Further, the attracting grooves 2a and 2b may be continuous grooves or intermittent grooves, and their distribution shape may be a grid shape or other shapes. For example, the attracting grooves 2a and 2b disclosed in JP 2005-15293 A and the like can be used. Therefore, detailed description is omitted here. The cross-sectional shape of the attracting grooves 2a and 2b is not particularly limited as long as the fired ceramic layer 3 can be divided by the attracting grooves 2a and 2b.

  The protective material layer 7 can be divided by the induction grooves (parting lines) 2a and 2b, the fired ceramic layer 3 can be provided with flexibility, and the fired ceramic layer 3 is cracked. Those with little decrease in magnetic permeability are preferred. In particular, the protective material layer 7 is not particularly limited as long as the fired ceramic layer 3 is a resin that extends without breaking even when the fired ceramic layer 3 is mountain-folded by the induction grooves 2a and 2b and divided by the dividing lines 2a and 2b. By forming the protective material layer 7 on the surface of the fired ceramic layer 3 provided with the induction grooves 2a, 2b, the powder falling when the fired ceramic layer 3 is divided by the induction grooves (partition lines) 2a, 2b, Reliability and durability can be increased.

  Next, the manufacturing method of the ceramic composite sheet 10 of this invention is demonstrated based on FIG. 3 and FIGS.

  As shown in FIGS. 7 to 9, the method for producing the ceramic composite sheet 10 of the present invention first cuts the ceramic green sheet 2 obtained on the resin film 1 such as PET into a predetermined shape, The resin film 1 is peeled off to obtain a ceramic green sheet 2. Next, as shown in FIG. 10, the ceramic green sheet 2 is fired to form a fired ceramic layer 3, and the laminated material layer 6 and the protective material layer 7 described above are laminated on both sides to obtain a ceramic composite sheet 10. . Thereafter, the fired ceramic layer 3 of the ceramic composite sheet 10 on which the laminated material layer 6 and the protective material layer 7 are laminated is divided into small pieces, and further, a machine such as a press in a desired shape according to the purpose of use and the product used. Cutting with a special means or laser. Then, the adhesive peeling member 21 is pressed against each cut surface exposed by cutting, and the separable ceramic fragments S and the like are removed.

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

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

  Further, the ceramic green sheet 2 may be previously formed into a predetermined size and shape, and in this case, cutting is not required before firing. Moreover, after forming as a continuous ceramic green sheet 2, it may be cut into a predetermined size and shape. In this case, the cutting for making the ceramic green sheet 2 into a predetermined size and shape may be performed before the firing process, either after step S1 or after step S2 to be described later. You may cut | disconnect by both the 2nd steps.

  The ceramic green sheet 2 can be obtained by mixing a ceramic powder, a binder resin, and a solvent, and then using a powder compression molding method, an injection molding method, a calendar method, an extrusion method, or the like. In addition, you may degrease the ceramic green sheet 2 as needed.

  Next, as shown in FIG. 8, attraction grooves 2a and 2b serving as cracks (partition lines) are formed on the surface of the ceramic green sheet 2 opposite to the resin film 1 (step S2). As shown in FIG. 2, the attracting grooves 2a and 2b are formed in a matrix form vertically and horizontally. The attracting grooves 2a and 2b are formed by pressing a forming blade corresponding to the attracting grooves 2a and 2b.

  Then, as described later, after firing the ceramic green sheet 2 to form the fired ceramic layer 3, the fired ceramic layer 3 is divided along the induction grooves 2a and 2b, and the induction grooves 2a and 2b are divided into the dividing lines 2a and 2a, 2b, and the fired ceramic layer 3 is finely divided into strips 2c.

  The attraction grooves 2a and 2b can be formed during the molding of the ceramic green sheet 2, after the molding or after the firing treatment. For example, when the induction grooves 2 a and 2 b are formed by a powder compression molding method or an injection molding method, it is preferable to form the grooves during the molding of the ceramic green sheet 2. Further, when the induction grooves 2a and 2b are formed on the ceramic green sheet 2 formed by applying the calender method, the extrusion method, or the resin film 1 with a doctor blade or the like, the ceramic green sheet 2 is formed and before firing. It is preferable to form a groove in.

  In the present embodiment, the induction grooves 2a and 2b are formed, but this step can be omitted. In particular, when the ceramic green sheet 2 is thin, the induction grooves 2a and 2b can be omitted and divided into strips 2c.

  Next, as shown in FIG. 9, the resin film 1 is peeled off from the ceramic green sheet 2 obtained in step S <b> 2, so that only the ceramic green sheet 2 is formed (step S <b> 3). Since the resin film 1 is unnecessary in the baking step described later, it is removed in this step.

  Next, the ceramic green sheet 2 obtained in step S3 is placed in a heating furnace and subjected to a firing process to produce a fired ceramic layer 3 (step S4). This step S4 is a known process and is a method disclosed in Japanese Patent Application Laid-Open No. 2005-15293 and the like, and thus detailed description thereof is omitted. In addition, although it heats by flowing continuously to a heating furnace only with 1 sheet | seat without superposing | stacking the ceramic green sheet 2, you may make it process in multiple sheets.

  Next, as shown in FIG. 10, the resin material layer 4 and the adhesive material layer 5 are integrally formed on the surface of the fired ceramic layer 3 obtained in step S4 on the side opposite to the surface where the attracting grooves 2a and 2b are formed. The laminated material layer 6 (for example, double-sided adhesive tape) is provided, and a protective material layer 7 for preventing powder falling is provided on the surface opposite to the surface on which the laminated material layer 6 is formed (step S5). .

  The protective material layer 7 is formed by adhering a film or sheet of PET resin or the like constituting the protective material layer 7 to the surface of the fired ceramic layer 3 through an adhesive material, or a resin constituting the protective material layer 7. It is formed by applying the contained paint to the surface of the fired ceramic layer 3.

  Specifically, a laminating process is performed in which a resin film (a laminated material layer 6 in which the adhesive material layer 5 is provided on the resin material layer 4) is attached to one side of the fired ceramic layer 3. In addition, as shown in FIG. 1, the peeling sheet 8 is bonded on the surface side of the laminated material layer 6 in a state where the release sheet 8 can be divided with the adhesive material layer 5 interposed. A protective material layer 7 is bonded to the other surface across the fired ceramic layer 3.

  Moreover, in this step S5, the laminated material layer 6 and the protective material layer 7 are made larger than the fired ceramic layer 3 from a viewpoint of preventing the exposure of the end surface 3a (see FIG. 10) of the fired ceramic layer 3. As shown in FIG. 10, it is constituted by a film sheet, and the inner surface of the laminated material layer 6 and the inner surface of the protective material layer 7 are brought into contact with each other so as to be joined, and the fired ceramic layer 3 protects the laminated material layer 6. It is good also as a structure wrapped with the material layer 7. FIG. In addition, when powder falling of the fired ceramic layer 3 can be prevented, the laminated material layer 6 and the protective material layer 7 do not necessarily need to be joined.

  In this way, the ceramic composite sheet 10 in which the resin material layer is bonded to both surfaces of the fired ceramic layer 3 via the adhesive material layer 5 is formed.

  Although the laminated material layer 6 and the protective material layer 7 are provided on the surface of the fired ceramic layer 3, the laminated material layer 6 or the protective material layer 7 may be provided only on one side of the fired ceramic layer 3. It is good also as a structure which provides the laminated material layer 6 (or protective material layer 7) on both surfaces of the baking ceramic layer 3. FIG.

  Next, the fired ceramic layer 3 of the ceramic composite sheet 10 obtained in step S5 is divided into strips 2c with reference to the dividing lines 2a and 2b (step S6). At this time, the laminated material layer 6 and the protective material layer 7 formed on one surface and the other surface of the fired ceramic layer 3 remain without being divided, and only the fired ceramic layer 3 is divided into the strips 2c. The With such a configuration, the ceramic composite sheet 10 can be bent by following the uneven state of the surfaces of the parts to be bonded, and the shape can be changed, and the pieces 2c of the fired ceramic layer 3 can be prevented from being separated apart. doing.

  For example, as shown in FIG. 4, the fired ceramic layer 3 is divided into strips 2 c by the dividing means 60. More specifically, the sintered ceramic layer 3 of the ceramic composite sheet 10 is divided into strips 2c by passing between a small diameter metal roller 61 and a large diameter resin roller 62.

  In the present embodiment, the fired ceramic layer 3 of the ceramic composite sheet 10 is divided into strips 2c to facilitate bending, but there is a case where it is not necessary to divide into strips 2c, in which case Step S6 can be omitted.

  Next, using a cutting means (press mold, cutting blade, punching blade, laser, etc.), the ceramic composite sheet 10 obtained in step S6 is cut into a shape corresponding to the portion to be attached. (Step S7). That is, the fired ceramic layer 3 and the resin material layer 4 are simultaneously cut into a desired shape. In particular, in the case of cutting with a mechanical cutting means (press die, cutting blade, punching blade, etc.), a large number of ceramic fragments that have come off or have come off from the exposed cut surface are generated. It is effective to use. For example, as shown in FIG. 5, as the cutting means 70, cutting is performed by relatively moving one of the ceramic composite sheet 10 with the upper mold 71 and the pressing mold 73, and the lower mold 72 and the pressing mold 73 sandwiched. To do. Further, a shearing means as disclosed in JP 11-42629 A may be used.

  When cutting with a laser, a clean cut surface can be obtained as compared with the case of mechanical cutting, but there are few detached ceramic fragments or detached ceramic fragments.

  Next, as shown in FIG. 1 and FIG. 6, the cut surface 3a of the ceramic layer 3 and the cut surface 4a of the resin material layer 4 in the ceramic composite sheet 10 obtained in step S7, the cut surface 5a of the adhesive material layer 5, Then, the adhesive release member 21 is pressed against the cut surface of the protective material layer 7, and the ceramic debris S attached to the adhesive material layer 5 or the like (or separable) is adhered to the adhesive release member 21. The adhesive peel surface 21a is attached and removed (step S8).

  If the adhesive release surface 21a is pressed against not only the fired ceramic layer 3, but also the cut surface 4a of the resin material layer 4, the cut surface 5a of the adhesive material layer 5, and the cut surface of the protective material layer 7, Ceramic fragments S and the like that are detached from the ceramic layer 3 and attached to the adhesive layer 5 can also be removed. In particular, by using the adhesive release member 21 having an adhesive strength stronger than the adhesive strength of the adhesive material layer 5, the ceramic fragments S and the like adhering to the adhesive material layer 5 can be removed by adhesion. The effect of removing S and the like is improved.

  In step S8, a plurality of ceramic composite sheets 10 may be stacked with the cut surfaces aligned, and the adhesive release member 21 may be pressed against each of the cut surfaces of the plurality of ceramic composite sheets 10 at the same time.

  In addition, a relatively clean cut surface can be obtained by laser cutting as compared with mechanical cutting. However, as with mechanical cutting, there are ceramic debris S that has been removed, and depending on the cut surface of the cutting surface, There may be a slight ceramic piece S or the like remaining. In this case as well, the ceramic debris S is removed by pressing the adhesive release surface 21a against the cut surface 4a of the resin material layer 4, the cut surface 5a of the adhesive material layer 5, and the cut surface of the protective material layer 7. Can do.

  In the case of laser cutting, ferrite or resin sublimated by laser irradiation may become soot and remain on the cut surface. Therefore, pressing the adhesive release surface 21a against the laser cut surface is effective not only forcibly removing the ceramic debris S but also forcibly removing the soot adhering to the cut surface. It can be said that. In the present invention, these are also referred to as ceramic fragments.

  In step S8, it is preferable that the suction means 22 such as vacuum air is brought close to the cut surfaces 3a, 4a and 5a to remove the ceramic fragments S and the like. In this case, it is preferable to use the suction air from which static electricity has been removed.

  Further, as shown in FIG. 6, in step S8, the adhesion state of the ceramic debris S or the like to the adhesive peeling member 21 pressed against the exposed cut surface 11 is inspected by the inspection means 25, and according to the inspection result. In addition, the determination unit 26 may determine whether or not the adhesive release member 21 is further pressed. The inspection means 25 may be anything that can detect, for example, a state where the ceramic debris S or the like adheres to the adhesive release surface 21a of the adhesive release member 21 and the state where the adhesive force is weakened. Further, the determination unit 26 is not particularly limited as long as it can determine whether the adhesive peeling member 21 is continuously used or replaced from the inspection result of the inspection unit 25, for example. With such a configuration, the ceramic fragments S and the like can be efficiently removed according to the occurrence state of the ceramic fragments S and the quality of the ceramic composite sheet 10 is stabilized.

  Further, from the viewpoint of reducing the cost, the adhesive peeling member 21 may be replaced after a certain period. When an operator presses the adhesive peeling member 21 by manual work, the timing which replaces the adhesive peeling member 21 can be judged visually by an operator.

  In addition, when the fired ceramic layer 3 is pasted along a curved surface portion or an uneven surface portion of an adherend, for example, an electronic device or an electronic component, the fired ceramic layer 3 is bent starting from the dividing lines 2a and 2b. By doing or breaking, it does not break into an indefinite shape in places other than the dividing lines 2a and 2b. Furthermore, in this case, without causing the powder falling phenomenon, it can be brought into close contact with or substantially in contact with a cylindrical side curved surface and an uneven surface as well as a flat surface. In the present invention, ceramic fragments S and the like that are likely to come off from the cut surface 11 of the ceramic composite sheet 10 or adhered to the adhesive material layer can be removed before the attachment to the adherend. Without causing the powder spilling phenomenon of the broken pieces S, the powdered pieces of the ceramic broken pieces S can be prevented.

[Embodiment 2]
Next, Embodiment 2 of this invention is demonstrated based on FIG. Only parts different from the first embodiment will be described. The second embodiment is a manufacturing method in which step S2 of the first embodiment is omitted. In particular, when the ceramic composite sheet 10 is thin, this is an effective manufacturing method.

[Embodiment 3]
Next, Embodiment 3 of the present invention will be described based on FIG. 12 and FIG. Only parts different from the second embodiment will be described. The third embodiment is a manufacturing method in which step S8a is added as a pre-process of step S8 as compared to the second embodiment. Step S <b> 8 a is a step of brushing the cut surface 11 before pressing the adhesive release member 21 against the cut surface 11 of the ceramic composite sheet 10. In this step, as shown in FIG. 9, both directions are the two directions of the direction in which the ceramic composite sheet 10 is overlapped (the vertical direction in FIG. 9) and the direction perpendicular to the direction (the horizontal direction). Brushing in different directions (arrow A). Such a configuration is preferable because the ceramic fragments S and the like can be easily removed, and the ceramic fragments S and the like can be removed without being sandwiched between the fired ceramic layers 3 or between the ceramic composite sheets 10.

  In this brushing, the cut surface 11 may be brushed one by one, or after several sheets are brushed. Moreover, you may brush manually and you may brush using a machine. When brushing is performed, ceramic fragments S and the like attached to the adhesive release surface 21a of the adhesive release member 21 are reduced in a single pressing step. Workability is improved because there is no need for replacement.

  Note that this brushing may be omitted when the cut surface 11 with very little powder fall or the powder fall is not regarded as a problem.

  The brushing may be performed in the first embodiment.

  INDUSTRIAL APPLICABILITY The present invention is extremely useful for a method for producing a fired ceramic composite sheet that can be attached to and peeled from a flat, curved, or uneven surface of an electronic device.

DESCRIPTION OF SYMBOLS 1 Resin film 2 Ceramic green sheet 2a, 2b Attraction groove | channel 2c Strip 3 Firing ceramic layer 3a Cutting surface 3b End surface 4 Resin material layer 4a Cutting surface 5 Adhesive material layer 5a Cutting surface 6 Laminating material layer 7 Protective material layer 8 Release sheet 10 Ceramic composite sheet 11 Cut surface S Ceramic fragment 21 Adhesive release member 21a Adhesive release surface 60 Dividing device 61 First roller 62 Second roller

Examples of the laminated material layer 6 in which the resin material layer 4 and the adhesive material layer 5 are integrally provided include a double-sided adhesive tape. It does not restrict | limit especially as a double-sided adhesive tape, A well-known double-sided adhesive tape can be used. Further, as the laminated material layer 6, the adhesive material layer 5, the flexible and stretchable resin material layer 4, the adhesive material layer 5, and the release sheet 8 may be sequentially laminated on one side of the fired ceramic layer 3. Good.

[Reason for correction]
In the paragraph [0032], the error was corrected. It is clear that these are all erroneous from the description of the specification at the beginning of the application and the description of the drawings. Therefore, this amendment is made within the scope of the matters described in the specification etc. at the time of filing.

Claims (7)

A firing step of firing a ceramic green sheet of a predetermined shape to form a fired ceramic layer;
A laminating step of attaching a resin material layer to at least one surface of the fired ceramic layer via an adhesive material layer to form a ceramic composite sheet;
A cutting step of simultaneously cutting the fired ceramic layer and the resin material layer into a desired shape;
A removing step of pressing a pressure-sensitive adhesive release member having a pressure-sensitive adhesive release surface against the cut surface exposed in the cutting step to remove ceramic fragments present on the cut surface. Production method. The adhesive strength of the adhesive release surface is stronger than the adhesive strength of the adhesive material layer,
The method for producing a ceramic composite sheet according to claim 1, wherein, in the removing step, the adhesive release surface is pressed against the fired ceramic layer, the resin material layer, and the adhesive material layer.   3. The method for producing a ceramic composite sheet according to claim 1, wherein in the removing step, ceramic fragments removed from the cut surface are sucked by a suction means.   In the removing step, a plurality of the ceramic composite sheets are stacked with the cut surfaces aligned, and an adhesive release member is simultaneously pressed against each of the cut surfaces of the plurality of ceramic composite sheets. The method for producing a ceramic composite sheet according to any one of claims 1 to 3.   The ceramic composite sheet according to any one of claims 1 to 4, further comprising a brushing step of brushing the cut surface to remove the ceramic debris before the removing step. Production method.   The brushing in the brushing step is performed such that the plurality of ceramic composite sheets are moved relative to a direction in which the plurality of ceramic composite sheets are stacked and a direction perpendicular to the direction, in a direction different from these two directions. The method for producing a ceramic composite sheet according to claim 5.   In the removing step, the adhesion state of the ceramic fragments to the adhesive release member pressed against the cut surface is inspected, and whether or not the adhesive release member is further pressed is determined according to the inspection result. The manufacturing method of the ceramic composite sheet of any one of Claims 1-6 characterized by including the process to do.

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