JP7084828B2 - Magnetic fixing jig and its manufacturing method - Google Patents

Description

The present invention relates to a magnetic fixing jig made of resin and a method for manufacturing the same.

A magnetic fixing jig for fixing various objects to be processed to the surface of the plate material by utilizing the magnetic force of a magnet embedded in the plate material is known. For example, it is used as a film forming jig (Patent Document 1) for forming a desired metal film pattern, a conveying jig (Patent Document 2) for conveying a substrate into a film forming apparatus, and the like. There is.

Such magnetic fixing jigs are mainly made of metal with little warpage.
The reason is that if the magnetic fixing jig is warped, the fixing of the object to be machined on the jig becomes insufficient. For example, when the metal thin film is placed on the jig, there is a problem that wrinkles are generated on the metal thin film, and when the highly elastic work object is placed on the jig, the jig is used. There is a problem that a gap is generated between the object to be machined and the object to be machined, and the force for fixing the object to be machined is weakened.

An example of manufacturing a conventional metal magnetic fixing jig will be described with reference to FIG.
In FIG. 8A, 9 is a metal plate, and when a magnetic fixing jig is manufactured from the metal plate 9, the surface of the metal plate 9 is first machined to form the shape (size / thickness) of the magnet 4. A recess 11 corresponding to the above is formed (FIG. 8 (b)). Next, after arranging the magnet 4 in the recess 11 (FIG. 8 (c)), a lid 10 made of the same metal material as the metal plate 9 and matching the shape of the recess 11 is attached (FIG. 8 (d)).
As a result, a metal magnetic fixing jig with less warpage as shown in FIG. 8D can be obtained.
However, forming a recess 11 corresponding to the shape (size / thickness) of the magnet 4 on the surface of the metal plate 9 is a very complicated process, and since the metal material is expensive, the magnetism made of metal is used. The reality is that manufacturing fixing jigs is not only laborious but also quite expensive.

Japanese Unexamined Patent Publication No. 2008-174767 Japanese Patent Application Laid-Open No. 2003-282445

Therefore, we investigated whether a resin material that is easy to process and inexpensive can be used instead of the metal material.
That is, as shown in FIGS. 9A to 9E, a recess 11 corresponding to the shape of the magnet 4 is formed on the surface of the resin base material 12 by cutting, as in the metal plate 9. A resin magnetic fixing jig is manufactured by arranging the magnet 4 in the recess 11 and then attaching an insulating adhesive sheet 6 (prepreg) to the entire surface of the resin base material 12 including the recess 11 with a laminated press. I tried.
However, it has been found that warpage (see FIG. 9 (e)) that affects the workpiece to be placed on the jig occurs.

Therefore, the present invention has been made in view of the above-mentioned conventional problems and actual conditions, and is a magnetic fixing jig made of resin, which suppresses the occurrence of warpage and has little influence on the fixing of the object to be processed. It is an object of the present invention to provide a method for manufacturing a magnetic fixing jig capable of obtaining such a magnetic fixing jig at low cost.

As a result of conducting various studies to solve the above problems, the present inventor has a vertically symmetrical structure centered on the center line in the thickness direction of the magnet core layer made of the resin core base material on which the magnet is arranged. If so, we have found that extremely good results can be obtained, and completed the present invention.

That is, in the present invention, at least a resin core base material, a magnet accommodating hole penetrating the resin core base material, a magnet arranged in the magnet accommodating hole, and a resin core group in which the magnet is arranged are provided. Magnetism characterized by having an insulating resin layer laminated on the front and back surfaces of a magnet core layer made of a material, and having a vertically symmetrical structure centered on a center line in the thickness direction of the magnet core layer. This is a solution to the above problem with a fixing magnet.

Further, in the present invention, at least, a step of forming a magnet accommodating hole penetrating the resin core substrate in the resin core substrate, a step of arranging a magnet in the magnet accommodating hole, and a step of arranging the magnet are arranged. It is characterized by having a step of laminating an insulating resin layer on the front and back surfaces of a magnet core layer made of a resin core base material so as to have a vertically symmetrical structure about a center line in the thickness direction of the magnet core layer. The above problem is solved by the manufacturing method of the magnetic fixing jig.

According to the magnetic fixing jig of the present invention, the laminated structure has a vertically symmetrical structure centered on the center line in the thickness direction of the magnet core layer made of the resin core base material on which the magnet is arranged. The occurrence of warpage is suppressed, and the object to be machined can be stably fixed on the jig.
Further, according to the method for manufacturing a magnetic fixing jig of the present invention, a magnetic fixing jig can be obtained by using a resin material that is easier to process and cheaper than a metal material.

The schematic sectional view of the magnetic fixing jig which concerns on 1st Embodiment of this invention. Schematic cross-sectional view showing the difference in surface unevenness between an unclad material and a metal foil-covered laminated board. Schematic cross-sectional process diagram which shows the manufacturing example of the magnetic fixing jig of this invention. Schematic plan view for explaining the structure of a magnet core layer. The schematic sectional view of the magnetic fixing jig which concerns on 2nd Embodiment of this invention. The schematic sectional view of the magnetic fixing jig which concerns on 3rd Embodiment of this invention. A schematic plan view for explaining the configuration of a magnet core layer in a modified example of a magnetic fixing jig. Schematic cross-sectional process diagram showing a manufacturing example of a metal magnetic fixing jig. Schematic cross-sectional process diagram showing a manufacturing example of a resin magnetic fixing jig.

Hereinafter, the first embodiment of the magnetic fixing jig of the present invention will be described with reference to FIG. The "insulating adhesive sheet" that appears in the text actually forms an "insulating resin layer" as a cured product after being cured by heating and laminating press. , For convenience of explanation, in this specification, the description will proceed with the expression "insulating adhesive sheet" regardless of before and after curing.

In FIG. 1, reference numeral 1 denotes a magnetic fixing jig, which has the same thickness as the resin core base material 2, the magnet accommodating hole 3 penetrating the resin core base material 2, and the resin core base material 2. An insulating adhesive sheet 6 and a hard resin group laminated on the front and back surfaces of a magnet core layer MC composed of a magnet 4 arranged in the magnet accommodating hole 3 and a resin core base material 2 in which the magnet 4 is arranged, respectively. It is composed of an insulating resin layer made of the material 7.
As shown in FIG. 1, the magnetic fixing jig 1 of the present invention has a vertically symmetrical structure in which the laminated structure is centered on the center line 5 in the thickness direction of the magnet core layer MC. Therefore, the warp is suppressed in the magnetic fixing jig 1.
Further, since the hard resin base material 7 is laminated on the outermost layer of the magnetic fixing jig 1, the flatness of the front and back layers of the magnetic fixing jig 1 is good, and the thickness accuracy is also good.

In this embodiment, as the hard resin base material 7, the base material obtained by etching and removing the metal foil (copper foil) of the metal foil-covered (copper-covered) laminated plate, or the surface on which the metal foil is not laminated from the beginning. A glossy unclad material is used.
As shown in FIG. 2A, the unclad material 15 is a resin base material on which no metal foil is laminated from the beginning, and its surface is glossy and smooth. On the other hand, the metal foil-clad (copper-clad) laminated plate (clad material) 16 has an anchor 19 (anchor 19) on the metal foil (copper foil) 17 and the resin 18 in order to improve the adhesion between the metal foil (copper foil) 17 and the resin 18. Since fine irregularities) are formed (see FIG. 2B), even if the metal foil (copper foil) 17 on the surface layer of the metal foil-clad (copper-clad) laminated plate 16 is removed by etching, the resin 18 is formed. Anchor marks 20 remain on the surface (see FIG. 2C), and the surface layer is not smooth.
Therefore, the unclad material 15 and the base material 21 obtained by etching and removing the metal foil (copper foil) of the metal foil-clad (copper-clad) laminated plate do not have the same surface shape, and the resin base material 7 is fixed on the jig. It can be selected according to the type of the object to be processed. For example, when there is no concern that the object to be processed is affected by the surface condition of the jig, the base material 21 obtained by removing the metal foil (copper foil) of the metal foil-clad (copper-clad) laminated plate by etching may be used. When there is a concern that the surface shape of the jig such as a thin film to be processed is transferred to the object to be processed, the unclad material 15 may be used. The unclad material 15 also has a feature that a residue is unlikely to remain in a process using powder or liquid.
The base material 21 from which the metal foil (copper foil) of the unclad material 15 and the metal foil-clad (copper-clad) laminated plate was removed by etching was impregnated and cured with a thermosetting resin such as an epoxy resin in the glass cloth. Materials and the like can be used.

In the magnetic fixing jig 1, the magnet accommodating hole 3 is formed in the center of the resin core base material 2, and as a result, the magnet 4 is arranged in the center of the magnetic fixing jig 1. The arrangement position of the magnet 4 is not particularly limited and may be on either the left or right side of the magnetic fixing jig 1, but in order to stably fix the object to be machined on the jig, the center of the magnetic fixing jig 1 is located. preferable.

Further, the thickness of the magnetic fixing jig 1 can be determined according to the application of the magnetic fixing jig, but there is a concern that the fixing strength due to the magnetic force is weakened and the object to be processed cannot be stably fixed on the jig. On the front and back of the magnet core layer MC, the distance between the magnet 4 and the outer layer surface of the resin base material 7 is preferably 0.5 mm or less. However, even if the distance is 0.5 mm or more, there is no problem as long as the magnet has a strong magnetic force and the object to be machined can be stably fixed on the jig.

Subsequently, the manufacturing method of the magnetic fixing jig 1 of the present invention will be described with reference to FIG.

First, as shown in FIGS. 3A and 3B, the resin core base material 2 is prepared, and the resin core base material 2 is placed at a desired position by a router, laser processing, or a mold. By punching or the like, the magnet accommodating hole 3 corresponding to the size of the magnet 4 is hollowed out.
As the resin core base material 2, for example, a glass epoxy substrate obtained by impregnating a reinforcing material such as glass cloth with a thermosetting resin such as epoxy resin can be preferably used.

Next, as shown in FIG. 3C, a magnet 4 having the same thickness as the resin core base material 2 is arranged in the magnet accommodating hole 3 to obtain a magnet core layer MC. The thickness of the resin core base material 2 and the magnet 4, that is, the thickness of the magnet core layer MC is, for example, 0.5 mm to 2.0 mm.
Here, when arranging the magnet 4 in the magnet accommodating hole 3, the magnet 4 and the magnet accommodating hole 3 are arranged as shown in FIG. 4 in consideration of the ease of accommodating the magnet 4 into the magnet accommodating hole 3. It is preferable to provide a clearance 22 of about 1.0 mm between the two. This clearance 22 is filled by the resin of the insulating adhesive sheet 6 laminated on the front and back surfaces of the magnet core layer MC during the laminating press, and does not remain in the magnetic fixing jig 1.

Next, as shown in FIGS. 3 (c) and 3 (d), 0 is formed on the front and back surfaces of the magnet core layer MC so as to have a vertically symmetrical structure centered on the center line 5 in the thickness direction of the magnet core layer MC. .2 mm to 0.3 mm insulating adhesive sheet 6 (for example, 2 or 3 0.1 mm prepregs) and 0.2 mm hard resin base material 7 (for example, unclad material) are stacked in order. The magnetic fixing jig 1 is obtained by performing a batch laminating press.
When the laminating press is performed, the laminating structure has a vertically symmetrical structure about the center line 5 in the thickness direction of the magnet core layer MC, so that the occurrence of warpage in the magnetic fixing jig 1 can be suppressed.

Next, as shown in FIG. 3 (e), the end face of the magnetic fixing jig 1 may be chamfered. Chamfering is preferable because it can prevent scratches on the end face.
If the chamfering process is performed at the same time as the division by using a V-cut for a printed wiring board or a chamfering router, the work process is reduced and the productivity is improved.
Further, it is preferable to polish or coat the chamfered end face with a resin. By polishing or resin coating, it is possible to prevent dust from being generated from the end face, and it is possible to prevent foreign matter from adhering when the object to be processed is fixed on the jig.

Subsequently, a second embodiment of the magnetic fixing jig of the present invention will be described with reference to FIG.

In FIG. 5, reference numeral 10 denotes a magnetic fixing jig, which has the same thickness as the resin core base material 2, the magnet accommodating hole 3 penetrating the resin core base material 2, and the resin core base material 2. It is composed of a magnet 4 arranged in the magnet accommodating hole 3 and an insulating resin layer made of an insulating adhesive sheet 6 laminated on the front and back surfaces of the magnet core layer MC. The magnet core layer MC is composed of one resin core base material 2 on which the magnet 4 is arranged.
As shown in FIG. 5, the magnetic fixing jig 10 of the present invention has a vertically symmetrical structure in which the laminated structure is centered on the center line 5 in the thickness direction of the magnet core layer MC. Therefore, the warp is suppressed in the magnetic fixing jig 10.

Further, since the insulating adhesive sheet 6 is laminated on the outermost layer of the magnetic fixing jig 10, the distance between the magnet 4 and the outer layer surface of the insulating adhesive sheet 6 becomes short, and the object to be processed to be fixed on the jig. The holding power becomes stronger. Further, since the material cost is lower than that of the structure using the resin base material 7, the magnetic fixing jig can be manufactured at low cost.

The method for manufacturing the magnetic fixing jig 10 according to the second embodiment of the present invention is the same as the method for the magnetic fixing jig 1 according to the first embodiment, and details thereof will be omitted.
However, in this embodiment, since the insulating adhesive sheet 6 is used as the outermost layer, the laminated press is performed by sandwiching it with a release paper having a smooth surface, more preferably a glossy surface, when performing the laminated press. It is preferable to do. As a result, the outer layer of the insulating adhesive sheet 6, that is, the front and back layers of the magnetic fixing jig 10, is transferred to the shape of the release paper, resulting in a smooth and glossy finish.
Further, when arranging the magnet 4 in the magnet accommodating hole 3, as shown in FIG. 4, a clearance 22 is provided between the magnet 4 and the magnet accommodating hole 3, but if the clearance 22 is large, the shape of the clearance is large. Is transferred to the front and back layers of the magnetic fixing jig 10, and there is a possibility that a dent may be generated in the front and back layers of the magnetic fixing jig 10. Therefore, the clearance 22 should be as narrow as about 0.5 mm.

Subsequently, a third embodiment of the magnetic fixing jig of the present invention will be described with reference to FIG.

In FIG. 6, 100 is a magnetic fixing jig, which has the same thickness as the resin core base material 2, the magnet accommodating hole 3 penetrating the resin core base material 2, and the resin core base material 2. It is composed of a magnet 4 arranged in the magnet accommodating hole 3 and an insulating resin layer composed of an insulating adhesive sheet 6 and a resin base material 7 laminated on the front and back surfaces of the magnet core layer MC, respectively. The magnet core layer MC is composed of two resin core base materials 2 on which magnets 4 are arranged, which are laminated via an insulating adhesive sheet 6.
As shown in FIG. 6, the magnetic fixing jig 100 of the present invention has a vertically symmetrical structure in which the laminated structure is centered on the center line 5 in the thickness direction of the magnet core layer MC. Therefore, the warp is suppressed in the magnetic fixing jig 100.

Further, since the magnet core layer MC is composed of two resin core base materials 2 on which the magnets 4 are arranged, the magnet core layer MC is overlapped with the insulating adhesive sheet 6, so that the magnet 4 is a thin magnet. Can be used. Magnet sheets, which are often used as thin magnets, have different magnetic force strengths on the front and back, so by arranging the directions of the two magnets so that the side with the strong magnetic force faces outward, the magnetic fixation of the reversible structure can be cured. Ingredients can be made.

The method for manufacturing the magnetic fixing jig 100 according to the third embodiment of the present invention is the same as the method for the magnetic fixing jig 1 according to the first embodiment, and details thereof will be omitted.

In explaining the present invention, an example of a rectangular magnetic fixing jig has been described, but the shape of the magnetic fixing jig is not limited to a rectangular shape, and is a circular shape as shown in FIG. 7A, or a circular shape. Of course, it is possible to apply the present invention to any shape such as a square shape.

Further, in explaining the present invention, an example of a rectangular magnet has been described, but the shape of the magnet itself is not limited to a rectangular shape, but is a polygonal shape (square shape, pentagonal shape, etc.) or a circular shape. , Elliptical shape, etc. can be arbitrarily selected. A rectangular magnet is preferable because the processing is composed of straight lines, the difficulty of processing is low, and the unit price is low.
On the other hand, when the shape of the magnetic fixing jig is a circular shape as shown in FIG. 7A, the area that can be embedded is small if it is a rectangular magnet, and the resin portion 23 without magnetic force is wide and is to be processed. The fixed position of the object is limited (see FIG. 7A). Therefore, if the square magnet 4 has an octagonal shape with the four corners cut off, the area of the magnet 4 that can be embedded in the circular jig increases compared to the case where the magnet 4 has a rectangular shape. The mounting area on which the object can be fixed becomes wide, and the object to be machined can be stably fixed on the jig (see FIG. 7 (b)).

1, 10, 100: Magnetic fixing jig 2: Resin core base material 3: Magnet accommodating hole 4: Magnet 5: Center line in the thickness direction of the magnet core layer 6: Insulation adhesive sheet 7: Resin base material 9: Metal Plate 10: Lid 11: Recess 12: Resin base material 15: Unclad material 16: Metal foil upholstery (copper upholstery) Laminated plate 17: Metal foil (copper foil)
18: Resin 19: Anchor 20: Anchor mark 21: Metal foil upholstery (copper upholstery) Base material from which the metal foil (copper foil) of the laminated plate is removed by etching 22: Clearance 23: Resin part MC: Magnet core layer

Claims (11)

At least, a magnet core layer composed of a resin core base material, a magnet accommodating hole penetrating the resin core base material, a magnet arranged in the magnet accommodating hole, and a resin core base material in which the magnet is arranged. A magnetic fixing jig characterized by having an insulating resin layer laminated on the front and back surfaces of the magnet core layer and having a vertically symmetrical structure centered on a center line in the thickness direction of the magnet core layer. The magnetic fixing jig according to claim 1, wherein the insulating resin layer is composed of an insulating adhesive sheet and a hard resin base material. The magnetic fixing jig according to claim 2, wherein the hard resin base material is an unclad material. The magnetic fixing jig according to claim 1, wherein the insulating resin layer is made of an insulating adhesive sheet. The invention according to any one of claims 1 to 4, wherein the magnet core layer is composed of two or more resin core base materials on which magnets are arranged, which are laminated via an insulating adhesive sheet. Magnetic fixing jig. One of claims 1 to 5, wherein the shape of the magnetic fixing jig is a circular shape, and the shape of the magnet is an octagonal shape in which the corners of the four corners of the square magnet are cut off. Magnetic fixing jig described in. At least from the step of forming a magnet accommodating hole penetrating the resin core substrate in the resin core substrate, the step of arranging the magnet in the magnet accommodating hole, and the step of arranging the magnet in the resin core substrate. Manufacture of a magnetic fixing jig characterized by having a step of laminating an insulating resin layer on the front and back surfaces of the magnet core layer so as to have a vertically symmetrical structure centered on the center line in the thickness direction of the magnet core layer. Method. The method for manufacturing a magnetic fixing jig according to claim 7, wherein the step of laminating the insulating resin layer is a step of laminating an insulating resin layer made of an insulating adhesive sheet and a hard resin base material. .. The method for manufacturing a magnetic fixing jig according to claim 8, wherein the hard resin base material is an unclad material. 7. The step of laminating the insulating resin layer is a step of laminating an insulating resin layer made of an insulating adhesive sheet, wherein the outer layer of the insulating adhesive sheet is sandwiched between release papers having a smooth surface. The method for manufacturing a magnetic fixing jig described in 1. Claims 7 to 10 further include a step of laminating two or more resin core base materials on which magnets are arranged via an insulating adhesive sheet before the step of laminating the insulating resin layer. The method for manufacturing a magnetic fixing jig according to any one of the above items.

Images