KR101889226B1 - Laminated sheet of flexible magnetic substance and method of manufacturing thereof - Google Patents

Abstract

The present invention relates to a flexible magnetic body laminated sheet with excellent sealability and structural stability, and a manufacturing method thereof. According to the present invention, the flexible magnetic body laminated sheet comprises: a first adhesive layer (120); a heat radiating sheet (130) stacked on the lower surface of the first adhesive layer (120); a second adhesive layer (121) stacked on the lower surface of the heat radiating sheet (130); a magnetic body (140) stacked on the lower surface of the second adhesive layer (121); a third adhesive layer (122) stacked on the upper surface of the first adhesive layer (120); a fourth adhesive layer (123) stacked on the lower surface of the magnetic body (140); and a protection film (150) stacked on the upper surface of the third adhesive layer (122). The first adhesive layer (120), the heat radiating sheet (130), the second adhesive layer (121), and the magnetic body (140) have a structure sealed by the third and fourth adhesive layers (122, 123), and the third and fourth adhesive layers (122, 123) are mutually bonded to surround an outer boundary surface of the first adhesive layer (120), the heat radiating sheet (130), the second adhesive layer (121), and the magnetic body (140).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a soft magnetic material laminated sheet,

The present invention relates to a soft magnetic material laminated sheet and a manufacturing method thereof, and more particularly, to a soft magnetic material laminated sheet excellent in sealing property and structural stability, capable of being produced by a single continuous process, ≪ / RTI >

The soft magnetic-substance-laminated sheet refers to a sheet in which various films including a magnetic material having flexibility are laminated, and is mainly used in parts of an electronic device such as a wireless charging module in the form of a composite sheet.

The conventional soft magnetic-substance-laminated sheet is manufactured by a separate process using a heat-radiating composite sheet and a magnetic composite sheet, followed by laminating the heat-radiating composite sheet and the magnetic composite sheet.

Fig. 1 (A) is a cross-sectional view schematically showing a heat-radiating composite sheet according to the related art, Fig. 1 (B) is a cross- Sectional view schematically showing a state of a soft magnetic-laminated sheet according to a related art manufactured by laminating a magnetic composite sheet and a magnetic composite sheet.

1 (A) to 1 (C), a heat-radiating composite sheet according to the related art includes a first release film 1, a first adhesive layer 2, a heat-radiating sheet 3, a second adhesive layer 4 And the second release film 5 are laminated in this order on the first adhesive layer 7 and the second release film 5 on the third adhesive layer 7, the magnetic release composite film according to the prior art has the third release film 6, the third adhesive layer 7, the magnetic substance 8, 9 and a protective film 10 are sequentially laminated. Since the heat-radiating composite sheet and the magnetic composite sheet are separately manufactured, it is necessary to protect the bottom surface of the first adhesive layer 2 after removing the first release film 1 from the heat-radiation composite sheet in order to produce the soft magnetic- Should be attached to the upper surface of the film (10). However, in the soft magnetic-substance-laminated sheet according to the related art, the defective rate due to the deviation of the attachment position generated in the process of attaching the heat-radiating composite sheet and the magnetic composite sheet is high and the magnetic substance, which is susceptible to oxidation, It is difficult to form a stable layered structure, and there is a problem that after adhesion, adhesion is weak and durability is poor. Further, when the soft magnetic material-laminated sheet according to the related art has a complicated shape of the outer boundary surface, there is a problem that the shape and quality of the product after lamination are not excellent.

Disclosure of Invention Technical Problem [8] The present invention has been made in view of the above problems, and it is an object of the present invention to provide a polyolefin resin composition which is excellent in sealing property and structural stability, can be produced by a single continuous process, can minimize a defective rate in a manufacturing process, And which is excellent in durability, and a method for manufacturing the same.

The above and other objects of the present invention can be achieved by the present invention described below.

The soft magnetic material-laminated sheet according to an embodiment of the present invention includes a first adhesive layer 120; A heat radiation sheet 130 laminated on the bottom of the first adhesive layer 120; A second adhesive layer 121 laminated on the bottom surface of the heat-radiating sheet 130; A magnetic body 140 laminated on the bottom surface of the second adhesive layer 121; A third adhesive layer 122 laminated on the upper surface of the first adhesive layer 120; A fourth adhesive layer 123 laminated on the bottom surface of the magnetic body 140; And a protective film 150 laminated on the upper surface of the third adhesive layer 122. The first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121, The third adhesive layer 122 and the fourth adhesive layer 123 have a structure sealed by the third adhesive layer 122 and the fourth adhesive layer 123. The third adhesive layer 122 and the fourth adhesive layer 123 are formed by the first adhesive layer 120, 2 adhesion layer 121 and the magnetic body 140 so as to surround the outer peripheral interface.

The third adhesive layer 122 and the fourth adhesive layer 123 are spaced apart from the outer boundary surfaces of the first adhesive layer 120, the heat radiation sheet 130, the second adhesive layer 121, and the magnetic substance 140, And an air gap 132 is formed between the outer boundary surfaces of the first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121 and the magnetic substance 140 and the third adhesive layer 122 and the fourth adhesive layer 123, Is formed.

The first adhesive layer 120, the heat-radiating sheet 130, and the second adhesive layer 121 may further include an inner hole 131 formed at a central portion thereof.

The heat-radiating sheet 130 may include a material selected from the group consisting of graphite, carbon nanotube (CNT), graphene, carbon black, and combinations thereof.

And the surface of the magnetic substance 140 has a crushed structure.

The first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121, and the magnetic substance 140 have the same area, and the third adhesive layer 122, the fourth adhesive layer 123, The first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121, and the second adhesive layer 121 are formed on the third adhesive layer 122, the fourth adhesive layer 123, and the protective film 150, ) And the magnetic body (140).

The magnetic substance 140 may be selected from the group consisting of a nanocrystal magnetic substance, an amorphous magnetic substance, a ferrite sheet, and a silicon steel plate.

The protective film 150 is a black and opaque film.

A method of manufacturing a soft magnetic-substance-laminated sheet according to an embodiment of the present invention includes the steps of: (S10) forming a first adhesive layer on an upper surface of a first release film and stacking a heat-radiating sheet on an upper surface of the first adhesive layer; A second adhesive layer is formed on the upper surface of the heat-radiating sheet, a second release film is laminated on the upper surface of the second adhesive layer, and then an outer boundary surface of the first adhesive layer, the heat-radiating sheet, the second adhesive layer, (S20); A step (S30) of removing the second release film in step S20, cutting the outer boundary surface of the mutually adhered magnetic material to a predetermined size after stacking the magnetic material on the upper surface of the second adhesive layer; A protective film on which a third adhesive layer is formed is attached to the bottom of the cut first adhesive layer, and a base film on which a fourth adhesive layer is formed is attached to the upper surface of the cut magnetic body, wherein the first adhesive layer, (S40) sealing the first adhesive layer, the heat-radiating sheet, the second adhesive layer, and the magnetic body by attaching the third adhesive layer and the fourth adhesive layer to a surface spaced apart from the cut outer boundary surface by a predetermined distance do.

Here, the manufacturing method of the soft magnetic-material-coated laminate sheet may further comprise the steps of: forming a first adhesive layer, a heat-radiating sheet, a second adhesive layer, and a fourth adhesive layer formed on the outer peripheral surface of the magnetic body, And cutting the protective film to a predetermined size (S50).

The step S20 is a step of simultaneously cutting the outer perimeter surface and the inner hole of the first adhesive layer, the heat-radiating sheet, the second adhesive layer, and the second release film.

In step S30, the outer boundary surface of the magnetic material is cut into the same shape as the outer boundary surfaces of the first adhesive layer, the heat radiation sheet, and the second adhesive layer cut in step S20.

In the step S30, the magnetic substance is laminated on the upper surface of the second adhesive layer to crush the surface of the magnetic substance, and then the outer boundary surface of the magnetic substance bonded to the second adhesive layer is cut to a predetermined size.

The present invention can be manufactured in a single continuous process with excellent sealability and structural stability, can minimize the defect rate in the manufacturing process, can produce a high quality product even when the outline boundary surface has complicated shape, The present invention has the effect of providing the excellent soft magnetic laminated sheet and the manufacturing method thereof.

Fig. 1 (A) is a cross-sectional view schematically showing a heat-radiating composite sheet according to the related art, Fig. 1 (B) is a cross- Sectional view schematically showing a state of a soft magnetic-laminated sheet according to a related art manufactured by laminating a magnetic composite sheet and a magnetic composite sheet.
2 is a cross-sectional view schematically showing a state of a soft magnetic material-laminated sheet according to an embodiment of the present invention.
3 is a cross-sectional view schematically showing a soft magnetic material laminated sheet including a gap according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view schematically showing a soft magnetic material-laminated sheet including a cavity and an inner hole according to an embodiment of the present invention.
5 is a photograph showing a state in which the surface of the magnetic material is pulverized by the knurling process.
FIG. 6A is a plan view schematically showing a front surface of a flexible magnetic-substance-laminated sheet according to an embodiment of the present invention, FIG. 6B is a plan view of a bottom surface of a flexible magnetic- Fig.
7 is a flowchart schematically showing a method of manufacturing a soft magnetic material laminated sheet according to an embodiment of the present invention.
8A to 8D are explanatory diagrams schematically showing a method of manufacturing a soft magnetic-laminated sheet according to an embodiment of the present invention.
FIG. 9 is an explanatory view schematically showing a state in which the outer circumferential boundary surface and the inner hole of the heat dissipation sheet are cut at the same time in the manufacturing method of the soft magnetic-substance-laminated sheet according to the embodiment of the present invention.
10 (A) is a cross-sectional view schematically showing a soft magnetic laminated sheet in which an inner hole is not formed according to an embodiment of the present invention, and FIG. 10 (B) Sectional view schematically showing a state of the soft magnetic material laminated sheet.

The above-mentioned objects, features and advantages of the present invention will become more apparent by describing in detail preferred embodiments and comparative examples of the present invention. The following detailed description is not to be taken in a limiting sense, and the scope of the invention is to be limited only by the appended claims, along with the full scope of equivalents to which the claims are entitled.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view schematically showing a state of a soft magnetic material-laminated sheet according to an embodiment of the present invention.

As shown in FIG. 2, the soft magnetic material-laminated sheet according to an embodiment of the present invention includes a first adhesive layer 120; A heat radiation sheet (130) laminated on a bottom surface of the first adhesive layer; A second adhesive layer 121 laminated on the bottom surface of the heat-radiating sheet 130; And a magnetic substance 140 laminated on the bottom surface of the second adhesive layer 121; A third adhesive layer 122 laminated on the upper surface of the first adhesive layer 120; A fourth adhesive layer 123 laminated on the bottom surface of the magnetic body 140; And a protective film 150 laminated on the upper surface of the third adhesive layer 122. The first adhesive layer 120, the heat radiation sheet 130, the second adhesive layer 121, The third adhesive layer 122 and the fourth adhesive layer 123 have a structure sealed by the third adhesive layer 122 and the fourth adhesive layer 123. The third adhesive layer 122 and the fourth adhesive layer 123 are formed by the first adhesive layer 120, 2 adhesion layer 121 and the magnetic body 140 so as to surround the outer peripheral interface.

Specifically, the soft magnetic compound-laminated sheet of the present invention has a structure in which the magnetic substance 140, the second adhesive layer 121, the heat-radiating sheet 130 and the first adhesive layer 120 are sequentially laminated is referred to as a third adhesive layer 122, The protective film 150 is formed on the upper surface of the third adhesive layer 122 so that the protective film 150 covers the magnetic body 140 and the heat- And the third adhesive layer 122 and the fourth adhesive layer 123 are formed on the side surfaces and the bottom surface of the magnetic substance 140 and the heat radiation sheet 130, And has a sealing structure capable of blocking moisture. The minute difference in the stacking order and direction of the magnetic substance 140, the second adhesive layer 121, the heat radiation sheet 130 and the first adhesive layer 120 should be interpreted as not affecting the scope of the present invention will be.

3 is a cross-sectional view schematically showing a soft magnetic material laminated sheet including a gap according to an embodiment of the present invention.

3, the third adhesive layer 122 and the fourth adhesive layer 123 of the soft magnetic material-laminated sheet according to an embodiment of the present invention may include a first adhesive layer 120, a heat-radiating sheet 130, The heat dissipation sheet 130, the second adhesive layer 121 and the magnetic substance 140 and the outer boundary surfaces of the first adhesive layer 120, the heat radiation sheet 130, the second adhesive layer 121 and the magnetic substance 140, The third adhesive layer 122 and the fourth adhesive layer 123 may have a structure in which an air gap 132 is formed. For example, when the thickness of each layer structure is thick or the adhesive strength of the third adhesive layer 122 and the fourth adhesive layer 123 is higher than that of the first adhesive layer 120, the heat radiation sheet 130, the second adhesive layer 121, The air gap 132 may be formed between the third adhesive layer 122 and the fourth adhesive layer 123. [ However, since the interfaces where the third adhesive layer 122 and the fourth adhesive layer 123, which are not formed with the voids 132, are adhered to each other must have sufficient durability so that the adhesion can be continuously maintained, The adhesive strength of the adhesive layer 122 and the fourth adhesive layer 123 should be set.

FIG. 4 is a cross-sectional view schematically showing a soft magnetic material-laminated sheet including a cavity and an inner hole according to an embodiment of the present invention.

4, the flexible magnetic-laminated sheet according to an embodiment of the present invention includes the first adhesive layer 120, the heat-radiating sheet 130, and the second adhesive layer 121 having an inner hole 131 formed at the center thereof As shown in FIG. The inner hole 131 functions to correct the thickness of the product or reduce the overall thickness when the soft magnetic laminated sheet of the present invention is used as a component of the apparatus, . For example, when the soft magnetic-substance-laminated sheet of the present invention is used as a component of a wirelessly-charged product, an attractor functioning to center the charging magnetic flux at the center is disposed. In this case, the inner hole 131 is formed The overall product thickness can be thinned and product quality can be improved. Of course, the structure of the soft magnetic material-laminated sheet of the present invention in which the inner hole 131 is formed may have a structure further including the air gap 132 as shown in FIG.

5 is a photograph showing a state in which the surface of the magnetic material is pulverized by the knurling process.

As shown in FIG. 5, it is preferable that the surface of the magnetic body 140 is processed so as to have a crushed structure. The knurling process for breaking the magnetic substance 140 is a process for improving the wireless charging performance of the magnetic substance when the soft magnetic-substance-laminated sheet of the present invention is used as a component of the wireless charging device. If the magnetic substance 140 is broken In use, the eddy current is generated. Therefore, the magnetic body 140 is crushed to cut off the generation path of the eddy current. 5, the surface of the magnetic substance 140 may have a regularly crushed surface, but the fractured shape of the magnetic substance 140 is necessarily limited to that shown in FIG. 5 It is not.

FIG. 6A is a plan view schematically showing a front surface of a flexible magnetic-substance-laminated sheet according to an embodiment of the present invention, FIG. 6B is a plan view of a bottom surface of a flexible magnetic- Fig.

2, the first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121, and the magnetic substance 140 have the same area as each other, The third adhesive layer 122, the fourth adhesive layer 123 and the protective film 150 have the same area and the areas of the third adhesive layer 122, the fourth adhesive layer 123 and the protective film 150 are It is preferable that the area of the first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121, and the magnetic material 140 is larger than the area of the first adhesive layer 120, the heat- 6A, the protective film 150 may be formed on the outer surface of the soft magnetic material laminated sheet so as to function as a protective film for the entire soft magnetic material laminated sheet, and the bottom surface of the soft magnetic material laminated sheet Since the outer surface of the fourth adhesive layer 123 is formed of a transparent film, the magnetic substance 140 is formed on the outer surface of the fourth adhesive layer 123 as shown in FIG. 6 (B) It is observed that the protective film 150 is formed. The area of the third adhesive layer 122, the fourth adhesive layer 123 and the protective film 150 is larger than the area of the first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121 and the magnetic substance 140 The reason for forming the third adhesive layer 122 is to shield the structure in which the magnetic substance 140 and the heat dissipation sheet 130 in which the protective film 150 is disposed from the moisture or moisture easily permeable from the top surface, The third adhesive layer 122 and the fourth adhesive layer 123 are formed in order to have moisture-permeable sealing structure that the fourth adhesive layer 123 can permeate from the side surface and the bottom surface of the magnetic substance 140 and the heat- The area of the first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121, and the magnetic body 140 must be larger.

The heat-radiating sheet 130 according to the present invention is excellent in the function of releasing heat to the outside, and is made of graphite, carbon nanotube (CNT), graphene, carbon Black (Carbon black), and combinations thereof.

The magnetic substance 140 of the present invention is preferably selected from the group consisting of a nanocrystal magnetic substance, an amorphous magnetic substance, a ferrite sheet, and a silicon steel plate.

The protective film 150 of the present invention is for protecting films and sheets laminated on the bottom surface, and it is preferable to use a black and opaque film. Specifically, when the protective film 150 is exposed to moisture, it prevents moisture from permeating the magnetic body 140 to be oxidized, prevents a wave front that may occur during the milling process of the magnetic body from flowing out, The reason why the film of opaque material is used is that the dimensional compatibility of the product is compared with the metallic color of the magnetic body when measuring with the camera or the like to secure the test recognition property.

7 is a flowchart schematically showing a method of manufacturing a soft magnetic material laminated sheet according to an embodiment of the present invention.

7, a method of manufacturing a soft magnetic-laminated sheet according to an embodiment of the present invention includes forming a first adhesive layer on an upper surface of a first release film, and laminating a heat-radiating sheet on an upper surface of the first adhesive layer Step S10; A second adhesive layer is formed on the upper surface of the heat-radiating sheet, a second release film is laminated on the upper surface of the second adhesive layer, and then an outer boundary surface of the first adhesive layer, the heat-radiating sheet, the second adhesive layer, (S20); S30 is a step of removing the second release film in step S20, cutting the outer boundary surface of the mutually bonded magnetic body to a predetermined size after stacking the magnetic bodies on the upper surface of the second adhesive layer, And a protective film having a third adhesive layer formed on a bottom surface of the cut first adhesive layer, and attaching a base film having a fourth adhesive layer formed on the cut surface of the magnetic substance, wherein the first adhesive layer, And a third adhesive layer and a fourth adhesive layer are mutually adhered to a surface spaced apart from the cut outer boundary surface of the magnetic body to seal the first adhesive layer, the heat radiation sheet, the second adhesive layer, and the magnetic substance. In addition, the method for manufacturing a soft magnetic-laminated sheet according to an embodiment of the present invention may further include a step of forming a soft magnetic-substance-laminated sheet having a first outer circumferential surface and a second outer circumferential surface of the first adhesive layer, the heat- And cutting the fourth adhesive layer, the third adhesive layer, and the protective film formed on the surface to a predetermined size.

FIGS. 8A to 8D are explanatory diagrams schematically showing a method for manufacturing a soft magnetic laminated sheet according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view of a soft magnetic laminated sheet according to an embodiment of the present invention. FIG. 8 is an explanatory view schematically showing a state in which the outer peripheral boundary surface and the inner hole of the heat radiation sheet are cut at the same time.

As shown in FIGS. 8A to 8D, a method of manufacturing a soft magnetic-substance-laminated sheet according to an embodiment of the present invention includes forming a first adhesive layer 120 on an upper surface of a first release film 110 And a step S10 of laminating the heat-radiating sheet 130 on the upper surface of the first adhesive layer 120 is performed. The first release film 110 is preferably made of a flexible resin that can be easily separated from the first adhesive layer 120. It is preferable to use a transparent adhesive for the first adhesive layer 120 and the first release film 110 Is separated from the first adhesive layer 120, the adhesive force to the heat-radiating sheet 130 should be sufficiently maintained.

The second adhesive layer 121 is formed on the upper surface of the heat dissipation sheet 130 after step S10 and the second release film 111 is laminated on the upper surface of the second adhesive layer 121 and then the first adhesive layer 120, the heat-dissipating sheet 130, the second adhesive layer 121, and the second release film 111 are cut to a predetermined size. The second adhesive layer 121 and the second release film 111 are preferably formed under the same conditions as those of the first adhesive layer 120 and the first release film 110, respectively. Here, if the heat-radiating sheet 130 is cut into the outer boundary surface punch 200 without laminating the second adhesive layer 121 and the second release film 111 on the upper surface of the heat-radiating sheet 130, The cut edge of the graphite is collapsed and a lot of fragments are generated, which causes the quality deterioration. That is, since the graphite has a strong coupling force with respect to the XY axis in the transverse direction but a weak coupling force with respect to the Z axis in the longitudinal direction, the second adhesive layer 121 and the second adhesive layer 121 are formed on the upper surface of the pre- If the outer boundary surfaces of the first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121 and the second release film 111 are cut after the release films 111 are laminated and adhered to each other, Can be solved.

As shown in FIG. 4, in step S20, only the outer boundary surfaces of the first adhesive layer, the heat-radiating sheet, the second adhesive layer, and the second release film may be cut. However, in order to form the inner hole 131, The outer edge of the first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121 and the second release film 111 and the inner hole 131 are formed simultaneously with the inner hole punching device 210 and the inner hole punching device 210, You can also cut.

After step S20, the second release film 111 of step S20 is removed, and the magnetic substance 140 is laminated on the upper surface of the second adhesive layer 121. Then, A step S30 is performed. In order to improve the overall quality of the soft magnetic material laminated sheet in this process, the outer boundary surface of the magnetic substance 140 is bonded to the outer boundary surface of the first adhesive layer 120, the heat radiation sheet 130, It is preferable to cut in the same shape. Since the magnetic substance 140 does not need to form an inner hole, the outer boundary surface punching device 200 cuts only the outer boundary surface.

In step S30, the magnetic substance 140 is laminated on the upper surface of the second adhesive layer 121, the surface of the magnetic substance 140 is crushed, and the outer boundary surface of the mutually adhered magnetic substance 140 is cut into a predetermined size And the like. In this process, the debris may flow out of the outer boundary surface of the laminated sheet. However, since the soft magnetic-substance-laminated sheet according to the present invention has a structure in which the magnetic substance 140 is sealed by the third adhesive layer 122 and the fourth adhesive layer 123, the structure stability is excellent and the defect rate can be minimized Respectively.

 The protective film 150 having the third adhesive layer 122 formed thereon is attached to the bottom of the cut first adhesive layer 120 after the step S30 and a fourth adhesive layer 123 is formed on the cut surface of the magnetic body 140 A third adhesive layer (not shown) is formed on a surface of the formed base material film 160 spaced apart from the cut out peripheral interface of the first adhesive layer 120, the heat radiation sheet 130, the second adhesive layer 121 and the magnetic material 140 122 and the fourth adhesive layer 123 are attached to each other to seal the first adhesive layer 120, the heat radiation sheet 130, the second adhesive layer 121, and the magnetic substance 140. Here, the third adhesive layer 122 and the fourth adhesive layer 123 are preferably made of a transparent adhesive resin, and the base film 160 may be a release film when separation is necessary in an additional process. Also,

The method of manufacturing a soft magnetic material laminated sheet of the present invention may be completed in step S40 if the desired shape is completed in step S40. However, if secondary machining is required to modify the shape of the soft magnetic material laminated sheet, the first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121, and the cut- And cutting the fourth adhesive layer 123, the third adhesive layer 122, and the protective film 150 formed on the surfaces spaced apart from the interface in a predetermined distance, to a predetermined size. Here, if the soft magnetic material-laminated sheet manufactured by the prior art does not have a structure sealed by the adhesive layer, the heat-dissipating sheet 130 and the magnetic material 140 can not be cut at the same time in the cutting process. For example, since the heat dissipating sheet 130 such as graphite has a stronger lateral binding force than the magnetic material 140 such as metal, there is a problem in that the quality of the cutting surface is lowered when the outer boundary surface punch 200 of the same material is used Occurs. However, since the heat-radiating sheet 130 and the magnetic substance 140 are not cut as shown in FIG. 3 (D) during the secondary processing, the method of manufacturing a soft magnetic-substance- It is advantageous.

10 (A) is a cross-sectional view schematically showing a soft magnetic laminated sheet in which an inner hole is not formed according to an embodiment of the present invention, and FIG. 10 (B) Sectional view schematically showing a state of the soft magnetic material laminated sheet.

10 (A) and 10 (B), the soft magnetic material-laminated sheet according to the present invention includes the magnetic substance 140, the second adhesive layer 121, the heat-radiating sheet 130 and the upper surface of the first adhesive layer 120 A heat transfer sheet 130 and a fourth adhesive layer 123 on the bottom surfaces of the magnetic substance 140, the second adhesive layer 121, the heat radiation sheet 130, and the first adhesive layer 120, Since the magnetic substance 140, the second adhesive layer 121, the heat-radiating sheet 130 and the first adhesive layer 120 are sealed with the base sheet 160 and the base film 160 attached thereto, It is advantageous in that the fragments of the sealing member 140 are leaked to the outside to cause defects or to prevent the occurrence of nonuniformity in the overall product shape, so that the structural stability is excellent. The soft magnetic material-laminated sheet according to the present invention may further include an inner hole 131 in the structure as described above.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims, And equivalents should also be considered to be within the scope of the present invention.

110: first release film
111: Second release film
120: first adhesive layer
121: Second adhesive layer
122: third adhesive layer
123: fourth adhesive layer
130: Heat-radiating sheet
131: inner hole
132: Pore
140: magnetic substance
150: Protective film
160: substrate film
200: Outer boundary punching device
210: inner hole punching device

Claims (13)

A first adhesive layer 120;
A heat radiation sheet 130 laminated on the bottom of the first adhesive layer 120;
A second adhesive layer 121 laminated on the bottom surface of the heat-radiating sheet 130;
A magnetic body 140 laminated on the bottom surface of the second adhesive layer 121;
A third adhesive layer 122 laminated on the upper surface of the first adhesive layer 120;
A fourth adhesive layer 123 laminated on the bottom surface of the magnetic body 140; And
And a protective film (150) laminated on the upper surface of the third adhesive layer (122)
The first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121 and the magnetic substance 140 have a structure sealed by the third adhesive layer 122 and the fourth adhesive layer 123, The adhesive layer 122 and the fourth adhesive layer 123 are adhered to each other with a predetermined distance from the outer boundary surfaces of the first adhesive layer 120, the heat radiation sheet 130, the second adhesive layer 121 and the magnetic substance 140, The air gap 132 is formed between the outer boundary surfaces of the adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121 and the magnetic substance 140 and the third adhesive layer 122 and the fourth adhesive layer 123 And a soft magnetic material laminated sheet. delete The flexible magnetic-laminated sheet according to claim 1, wherein the first adhesive layer (120), the heat-radiating sheet (130), and the second adhesive layer (121) further include inner holes (131) formed at the center. The heat dissipation sheet according to claim 1, wherein the heat dissipation sheet includes a material selected from the group consisting of graphite, carbon nanotube (CNT), graphene, carbon black, Wherein the soft magnetic material laminated sheet comprises a soft magnetic material laminated sheet. The soft magnetic material laminated sheet according to claim 1, wherein the surface of the magnetic substance (140) has a crushed structure. The method of claim 1, wherein the first adhesive layer 120, the heat-radiating sheet 130, the second adhesive layer 121, and the magnetic substance 140 have the same area, and the third adhesive layer 122, The first adhesive layer 120 and the heat-radiating sheet 130 may have the same area as the third adhesive layer 122, the fourth adhesive layer 123, and the protective film 150, The second adhesive layer 121, and the magnetic substance 140. The soft magnetic body-laminated sheet according to claim 1, The magnetron according to claim 1, wherein the magnetic substance (140) is selected from the group consisting of a nanocrystalline magnetic substance, an amorphous magnetic substance, a ferrite sheet and a silicon steel plate. Magnetic material laminated sheet. The soft magnetic material laminated sheet according to claim 1, wherein the protective film (150) is a black, opaque film. (S10) forming a first adhesive layer on the upper surface of the first release film, and laminating a heat radiation sheet on the upper surface of the first adhesive layer;
A second adhesive layer is formed on the upper surface of the heat-radiating sheet, a second release film is laminated on the upper surface of the second adhesive layer, and then an outer boundary surface of the first adhesive layer, the heat-radiating sheet, the second adhesive layer, (S20);
A step (S30) of removing the second release film in step S20, cutting the outer boundary surface of the mutually adhered magnetic material to a predetermined size after stacking the magnetic material on the upper surface of the second adhesive layer;
A protective film on which a third adhesive layer is formed is attached to the bottom of the cut first adhesive layer, and a base film on which a fourth adhesive layer is formed is attached to the upper surface of the cut magnetic body, wherein the first adhesive layer, (S40) sealing the first adhesive layer, the heat-radiating sheet, the second adhesive layer, and the magnetic body by attaching the third adhesive layer and the fourth adhesive layer to a surface spaced apart from the cut outer boundary surface by a predetermined distance Wherein the soft magnetic material layer-laminated sheet comprises a soft magnetic material. The method of manufacturing a soft magnetic-substance-laminated sheet according to claim 9, wherein the soft magnetic-laminated sheet includes a first adhesive layer, a heat-radiating sheet, a second adhesive layer, and a fourth adhesive layer formed on the outer peripheral surface of the magnetic body, And cutting the third adhesive layer and the protective film to a predetermined size (S50). The method of manufacturing a soft magnetic-substance-laminated sheet according to claim 9, wherein the step (S20) simultaneously cuts the outer peripheral surface and the inner hole of the first adhesive layer, the heat-radiating sheet, the second adhesive layer, and the second release film. 10. The method of manufacturing a soft magnetic-substance-laminated sheet according to claim 9, wherein in step S30, the outer boundary surface of the magnetic material is cut into the same shape as the outer boundary surfaces of the first adhesive layer, the heat- . The method according to claim 9, wherein in step S30, a magnetic body is laminated on the upper surface of the second adhesive layer to crush the surface of the magnetic body, and then the outer boundary surface of the magnetic body bonded to the second adhesive layer is cut to a predetermined size Of the soft magnetic material laminated sheet.

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