Electromagnetic loss film and electromagnetic loss composite structure using same

Abstract

The invention discloses an electromagnetic loss film and an electromagnetic loss composite structure using the same. The electromagnetic loss film comprises a magnetic oxide film body and a plurality of electromagnetic loss structures. The magnetic oxide film body corresponds to a magnetic response frequency (FR), and the range of the magnetic response frequency is 0.1 MHz < = FR < = 300 GHz. The electromagnetic loss structures are formed on the magnetic oxide film body, the electromagnetic loss structures penetrate through or are sunken in the magnetic oxide film body, each electromagnetic loss structure has a long diameter, the long diameter is N1 * light velocity / FR, 0.005 < = N1 < = 1, the distance between the electromagnetic loss structures is N2 * light velocity / FR, 0.005 < = N2 < = 1, and N1lt; n2.

Description

Technical Field

[0001] The present disclosure relates to the field of electromagnetic shielding, and more particularly to an electromagnetic loss film and an electromagnetic loss composite structure using the same. Background Art

[0002] With the progress of communication technology, the setting density of electronic components has been increasing day by day, but many side effects have also occurred. In the new generation of communication technology, ultra-high frequency and multi-functional communication frequency band systems have shortened the distance between modules, resulting in a significant increase in interactive EMI interference, leading to a decline in system performance and the loss of the advantages of low latency and high reliability in signal transmission.

[0003] The common method in the prior art is to coat a metal layer on the surface of the module to suppress EMI interference by reflecting electromagnetic waves with the metal. However, the electromagnetic waves reflected in this way will form a secondary EMI interference source, affecting the surrounding components, and the electromagnetic wave noise generated between the internal components will be reflected by the metal layer, generating EMI interference and affecting the operation performance of the module, resulting in a decrease in communication quality.

[0004] Disclosure Content

[0005] Herein, the present disclosure provides an electromagnetic loss film. According to an embodiment, the electromagnetic loss film includes a magnetic oxide film body and a plurality of electromagnetic loss structures. The magnetic oxide film body corresponds to a magnetic response frequency (FR), and the range of the magnetic response frequency is 0.1 MHz ≤ FR ≤ 300 GHz. The electromagnetic loss structures are formed in the magnetic oxide film body, the electromagnetic loss structures penetrate or are recessed in the magnetic oxide film body, the electromagnetic loss structures have a major axis, the size of the major axis is N1 × speed of light / FR, 0.005 ≤ N1 ≤ 1, and the distance between the electromagnetic loss structures is N2 × speed of light / FR, 0.005 ≤ N2 ≤ 1, and N1 < N2.

[0006] Further, in some embodiments, the present disclosure also provides an electromagnetic loss composite structure. The electromagnetic loss composite structure includes a first electromagnetic loss film and a second electromagnetic loss film. The second electromagnetic loss film is located on the first electromagnetic loss film. The first electromagnetic loss film and the second electromagnetic loss film respectively include a magnetic oxide film body and a plurality of electromagnetic loss structures. The magnetic oxide corresponds to a magnetic response frequency (FR), where the range of the magnetic response frequency is 0.1 MHz ≤ FR ≤ 300 GHz. The electromagnetic loss structures penetrate or are recessed in the magnetic oxide film body, and each electromagnetic loss structure has a major axis; the size of the major axis is N1 × speed of light / FR, 0.005 ≤ N1 ≤ 1, and the distance between the electromagnetic loss structures is N2 × speed of light / FR, 0.005 ≤ N2 ≤ 1, and N1 < N2. Description of the Drawings

[0007] Figure 1 Schematic diagram of the first embodiment of the electromagnetic loss film;

[0008] Figure 2 Schematic diagram of the second embodiment of the electromagnetic loss film;

[0009] Figure 3 Schematic diagram of the third embodiment of the electromagnetic loss film;

[0010] Figure 4 Schematic diagram of the fourth embodiment of the electromagnetic loss film;

[0011] Figure 5A Schematic diagram of the fifth embodiment of the electromagnetic loss film;

[0012] Figure 5B Cross-sectional view of the fifth embodiment of the electromagnetic loss film;

[0013] Figure 6 Schematic diagram of the sixth embodiment of the electromagnetic loss film;

[0014] Figure 7 Schematic diagram of the seventh embodiment of the electromagnetic loss film;

[0015] Figure 8 Schematic diagram of the eighth embodiment of the electromagnetic loss film;

[0016] Figure 9 Schematic diagram of the ninth embodiment of the electromagnetic loss film;

[0017] Figure 10 Schematic diagram of the first embodiment of the electromagnetic loss composite structure;

[0018] Figure 11 Schematic diagram of the second embodiment of the electromagnetic loss composite structure;

[0019] Figure 12 Schematic diagram of the third embodiment of the electromagnetic loss composite structure;

[0020] Figures 13A to 13D Wave frequency diagram of the frequency - attenuation degree of the electromagnetic loss film with different electromagnetic loss structure shapes;

[0021] Figure 14A and Figure 14B Wave frequency diagram of the frequency - attenuation degree of the electromagnetic loss film at a lower magnetic response frequency;

[0022] Figures 15A to 15G 、 Figures 16A to 16D Wave frequency diagram of the frequency - attenuation degree of the electromagnetic loss film at different magnetic response frequencies;

[0023] Figure 17 Wave frequency diagram of the frequency - attenuation degree at different N1 / N2 ratios;

[0024] Figure 18It is the wave frequency diagram of frequency - attenuation degree of the electromagnetic loss film at different thicknesses;

[0025] Figure 19 It is the wave frequency diagram of frequency - attenuation degree of the electromagnetic loss composite structure at different aperture ratios;

[0026] Figure 20 It is the wave frequency diagram of frequency - attenuation degree applied to actual products.

[0027] Symbol Explanation

[0028] 1: Electromagnetic loss film

[0029] 1A: First electromagnetic loss film

[0030] 1B: Second electromagnetic loss film

[0031] 10: Magnetic oxide film body

[0032] 30: Adhesive film layer

[0033] 40: Metal layer

[0034] 20: Multiple electromagnetic loss structures

[0035] 100: Electromagnetic loss composite structure

[0036] D: Spacing Detailed Implementation Manner

[0037] Figure 1 It is a schematic diagram of the first embodiment of the electromagnetic loss film. As Figure 1 shown, the electromagnetic loss film 1 includes a magnetic oxide film body 10 and multiple electromagnetic loss structures 20. Here, the magnetic oxide film body 10 corresponds to the magnetic response frequency (FR), and the range of the magnetic response frequency is 0.1 MHz ≤ FR ≤ 300 GHz. The electromagnetic loss structures 20 are formed on the magnetic oxide film body 10. In the first embodiment, the electromagnetic loss structures 20 are circular through - holes penetrating the magnetic oxide film body 10. The diameter of the electromagnetic loss structure 20 is N1 × speed of light / FR, where 0.005 ≤ N1 ≤ 1. The spacing D between the electromagnetic loss structures 20 is N2 × speed of light / FR, where 0.005 ≤ N2 ≤ 1, and N1 < N2.

[0038] Here, the magnetic oxide film body 10 is made of iron oxide, cobalt oxide, nickel oxide, manganese oxide, and oxides of iron, cobalt, nickel, and manganese alloys. The electromagnetic loss film 1 is mainly used to adhere to the outside of electronic components for encapsulation and shielding. The electromagnetic waves generated inside can be concentrated in the electromagnetic loss structure 20 and consumed through reflection and absorption. Therefore, the magnetic response frequency (FR) can be selected according to the frequency mainly generated by the electronic components, and then the appropriate ratio of magnetic oxide materials can be selected. Further, the magnetic oxide film body 10 can be doped with conductive electromagnetic consumables and dielectric electromagnetic consumables to achieve better electromagnetic loss function. More specifically, the dielectric ceramic consumables can be titanium oxide, barium oxide, or oxides of titanium-barium alloys, and the conductive electromagnetic consumables can be gold, silver, aluminum, iron, cobalt, nickel, manganese, carbon, graphite, which can be doped into the magnetic oxide film body 10 in the form of powder.

[0039] Figure 2 It is a schematic diagram of the second embodiment of the electromagnetic loss film. Figure 3 It is a schematic diagram of the third embodiment of the electromagnetic loss film. As Figure 2 and Figure 3 shown, also referring to Figure 1 , different from the first embodiment, Figure 2 the electromagnetic loss structure 20 is an oval through-hole, while Figure 3 the electromagnetic loss structure 20 is a rectangular through-hole. Generally speaking, the major axis of the ellipse, the side length of the rectangle, and the diameter of the circle are collectively called the major diameter. The length of the major diameter corresponds to N1×speed of light / FR, where 0.005 ≤ N1 ≤ 1. Further, there is also a relationship of 0.1 ≤ N1 / N2 < 1.

[0040] Figure 4 It is a schematic diagram of the fourth embodiment of the electromagnetic loss film. Figure 5A It is a schematic diagram of the fifth embodiment of the electromagnetic loss film. Figure 5B It is a cross-sectional view of the fifth embodiment of the electromagnetic loss film. Figure 6 It is a schematic diagram of the sixth embodiment of the electromagnetic loss film. Figure 7 It is a schematic diagram of the seventh embodiment of the electromagnetic loss film. As Figures 4 to 7 shown, also referring to Figures 1 to 3 , the difference between the fourth to seventh embodiments and the previous embodiments is that the electromagnetic loss structure 20 is a blind hole recessed in the magnetic oxide film body 10, but this can have different shapes, for example, a cylindrical blind hole, a hemispherical blind hole, a semi-elliptical cylindrical blind hole, or a square columnar blind hole. Here, the thickness of the magnetic oxide film body 10 is not particularly limited, mainly depending on the product requirements and having different thicknesses, and the range can be from 0.1 mm to 25 m, such as 0.2 mm to 25 mm, 0.25 mm to 8 mm, 25 mm to 100 mm, 100 mm to 1 m, 1 m to 25 m.

[0041] Figure 8 Schematic diagram of the eighth embodiment of the electromagnetic loss film. As Figure 8 shown, referring also to Figure 1 , in the eighth embodiment, an adhesive film layer 30 is attached to the surface of the magnetic oxide film body 10, and the adhesive film layer 30 further enhances the absorption effect of electromagnetic waves in the electromagnetic loss structure 20. Here, the adhesive film layer 30 can also be applied to the electromagnetic loss film 1 of the second to sixth embodiments.

[0042] Figure 9 Schematic diagram of the ninth embodiment of the electromagnetic loss film. As Figure 9 shown, referring also to Figure 1 , in the ninth embodiment, a metal layer 40 is attached to the surface of the magnetic oxide film body 10. The metal layer 40 reflects external electromagnetic waves, and the electromagnetic waves generated by internal components can be concentrated and dissipated in the electromagnetic loss structure 20. Here, the metal layer 40 can also be applied to the electromagnetic loss film 1 of the second to seventh embodiments.

[0043] Figure 10 Schematic diagram of the first embodiment of the electromagnetic loss composite structure. As Figure 10 shown, the electromagnetic loss composite structure 100 includes a first electromagnetic loss film 1A and a second electromagnetic loss film 1B. Here, the second electromagnetic loss film 1B is located on the first electromagnetic loss film 1A. Here, the electromagnetic loss composite structure 100 can be formed by combining the various embodiments shown in Figures 1 to 7 . The first electromagnetic loss film 1A and the second electromagnetic loss film 1B are the same as the aforementioned electromagnetic loss film 1. However, according to actual requirements, a magnetic oxide film body 10 with the same magnetic response frequency or different magnetic response frequencies can be selected. Thus, it can be adjusted for different wave frequency environments and products. Additionally, when selecting a magnetic oxide film body 10 with the same magnetic response frequency, different shapes or spacings D of the electromagnetic loss structure 20 can also be selected.

[0044] Furthermore, in some embodiments, the electromagnetic loss composite structure 100 further includes a metal layer 40, and the metal layer 40 is located between the first electromagnetic loss film 1A and the second electromagnetic loss film 1B. That is, the embodiment shown in Figure 9 can be combined with the embodiment shown in Figures 1 to 7 .

[0045] Figure 11 Schematic diagram of the second embodiment of the electromagnetic loss composite structure. Figure 12 Schematic diagram of the third embodiment of the electromagnetic loss composite structure. As Figure 11 and Figure 12 shown, referring also to Figure 10, in the second and third embodiments of the electromagnetic loss composite structure, the major axis lengths of the electromagnetic loss structures 20 of the first electromagnetic loss film 1A and the second electromagnetic loss film 1B are different. In other words, according to the frequency generated by the electronic component and the external wave frequency environment, through the combination of two layers and considering whether to apply the metal layer 40, the most suitable solution can be selected, thereby isolating the interference of external electromagnetic waves. At the same time, it can also avoid the interference of electromagnetic waves generated by internal electronic components.

[0046] Here, in the electromagnetic loss composite structure 100, if the major axis lengths of the electromagnetic loss structures 20 of the first electromagnetic loss film 1A and the second electromagnetic loss film 1B are different, the larger major axis length is defined as R, the smaller major axis length is R1, R is N1×speed of light / FR, 0.005≤N1≤1. The distance D between the electromagnetic loss structures 20 is N2×speed of light / FR, where 0.005≤N2≤1, and N1 < N2. In addition, R1 is N1×N3×speed of light / FR, where 0.1≤N3≤1.

[0047] Next, the frequency-attenuation wave frequency diagrams of different embodiments will be used to illustrate the actual experimental effects. Figures 13A to 13D It is the frequency-attenuation wave frequency diagram of the electromagnetic loss film with different electromagnetic loss structure shapes. Here, the magnetic oxide film body 10 corresponding to the magnetic response frequency of 50 GHz is selected, the thickness of the magnetic oxide film body 10 is 0.25 mm, and according to the condition that the distance D between the electromagnetic loss structures 20 is N2×speed of light / FR, where 0.005≤N2≤1, N2 is selected as 0.23, 0.12, and 0.08 to inversely calculate the distance as Experimental Example 1, Experimental Example 2, Experimental Example 3... to Experimental Example 10, Experimental Example 11, Experimental Example 12. And the magnetic oxide film body 10 without holes is used as Comparative Example 1. Figure 13A Adopt the structure of the fourth embodiment, Figure 13B Adopt the fourth embodiment with Figure 9 the metal layer, Figure 13C Adopt the structure of the fifth embodiment, while Figure 13D Adopt the structure of the seventh embodiment.

[0048] Regardless of the structure of the electromagnetic loss film 1 adopted, it can be found that at the absorption peak of 50 GHz, the full width at half maximum is slightly increased, and in addition, absorption peaks are generated in other frequency ranges. In this way, through the absorption of multiple frequency bands, the overall electromagnetic waves can be effectively dissipated and attenuated.

[0049] Figure 14A and Figure 14B It is the frequency-attenuation wave frequency diagram of the electromagnetic loss film at a lower magnetic response frequency. As Figure 14A and Figure 14BAs shown, the structure of the fourth embodiment is adopted here, and 0.3 MHz and 0.3 GHz are respectively selected as the magnetic response frequencies. According to the condition that the distance D between the electromagnetic loss structures 20 is N2×speed of light / FR, where 0.005 ≤ N2 ≤ 1, N2 is selected as 0.07, 0.04, and 0.02 to inversely calculate the distance D as Experimental Example 13, Experimental Example 14, Experimental Example 15, Experimental Example 16, Experimental Example 17, and Experimental Example 18, and the unperforated magnetic oxide film body 10 is used as Comparative Example 2 and Comparative Example 3 for comparison. Due to the relatively low frequency, the required thickness of the magnetic oxide film body 10 is relatively large, which are 25 m and 25 mm respectively, and it is mostly applied to frequency absorption in the military, space, and building types.

[0050] As Figure 14A and Figure 14B shown, it can be found that at the absorption peak corresponding to, there is a slightly increasing phenomenon in the full width at half maximum, and the overall attenuation degree has been improved.

[0051] Figures 15A to 15G , Figures 16A to 16D is the frequency-attenuation degree wave frequency diagram of the electromagnetic loss film at different magnetic response frequencies. Figures 15A to 16D The thickness of the adopted magnetic oxide film body 10 is 0.25 mm. Figures 15A to 15G The structure of the fourth embodiment is adopted, and the selected magnetic response frequencies are 10 GHz, 20 GHz, 100 GHz, 150 GHz, 200 GHz, 250 GHz, and 300 GHz respectively. According to the condition that the distance D between the electromagnetic loss structures 20 is N2×speed of light / FR, where 0.005 ≤ N2 ≤ 1, N2 is selected as 0.23, 0.12, and 0.08 to inversely calculate the distance D as Experimental Example 19, Experimental Example 20, Experimental Example 21... to Experimental Example 37, Experimental Example 38, and Experimental Example 39, and the unperforated magnetic oxide film body 10 is respectively paired with Comparative Example 4, Comparative Example 5, Comparative Example 6, Comparative Example 7, Comparative Example 8, Comparative Example 9, and Comparative Example 10 for comparison.

[0052] Figures 16A to 16D The structure of the seventh embodiment is adopted, and the selected magnetic response frequencies are 100 GHz, 150 GHz, 200 GHz, and 250 GHz respectively. According to the condition that the distance D between the electromagnetic loss structures 20 is N2×speed of light / FR, where 0.005 ≤ N2 ≤ 1, N2 is selected as 0.23, 0.12, and 0.08 to inversely calculate the distance D as Experimental Example 40, Experimental Example 41, Experimental Example 42..... to Experimental Example 49, Experimental Example 50, and Experimental Example 51, and the aforementioned Comparative Example 6, Comparative Example 7, Comparative Example 8, and Comparative Example 9 are respectively paired for comparison.

[0053] Figures 15A to 16DAs shown, compared with these comparative examples, through the setting of the electromagnetic loss structure 20, these embodiments can increase the absorption range corresponding to the magnetic response absorption peak, and the peak value is increased. Further, under different spacing arrangements, even more absorption peaks are generated. Therefore, the setting of the electromagnetic loss structure 20 can effectively increase the frequency band range of electromagnetic wave absorption. Therefore, the electromagnetic loss structure 20 helps the absorption of electromagnetic waves, attenuates the intensity of electromagnetic waves, and can especially absorb the electromagnetic waves generated by internal electronic components.

[0054] Figure 17 It is a wave frequency diagram of frequency - attenuation degree under different N1 / N2 ratios. Figure 17 Adopt the structure of the first embodiment, the selected magnetic response frequency is 50 GHz, the fixed spacing D of the two electromagnetic loss structures 20 is 5.996 mm, and the magnetic oxide film body 10 with a thickness of 0.25 is used. The N1 / N2 ratios of Experimental Example 52 and Experimental Example 53 are 0.1 and 0.9 respectively, and the magnetic oxide film body 10 without perforation is used as Comparative Example 11 for comparison.

[0055] As Figure 17 shown, for experimental examples with different N1 / N2 ratios, the absorption degree and frequency range can be improved. For example, the absorption characteristics are good when 0.1 ≤ N1 / N2 < 1. And Experimental Example 53 is more obvious in generating other absorption peaks.

[0056] Figure 18 It is a wave frequency diagram of frequency - attenuation degree of the electromagnetic loss film under different thicknesses. Figure 18 Adopt the structure of the first embodiment, the selected magnetic response frequency is 50 GHz. Under the conditions that N1 is 0.009 and N2 is 0.01, the magnetic oxide film bodies 10 with thicknesses of 0.2 mm, 1 mm, and 8 mm are selected as Experimental Example 54, Experimental Example 55, and Experimental Example 56 respectively, and the magnetic oxide film body 10 with a thickness of 0.2 mm without perforation is selected as Comparative Example 12.

[0057] As Figure 18 shown, regardless of the thickness, the electromagnetic loss film 1 with the electromagnetic loss structure 20 can achieve the characteristic of increasing the frequency range of absorption of the magnetic response absorption peak and generating more absorption peaks.

[0058] Figure 19 It is a wave frequency diagram of frequency - attenuation degree of the electromagnetic loss composite structure under different aperture ratios. As Figure 19 shown, Figure 19Adopt the structure of the second embodiment of the electromagnetic loss composite structure, select a magnetic response frequency of 50 GHz, use a magnetic oxide film body 10 with a double-layer thickness of 0.25 mm, adopt N1 of 0.05, and match N3 of 0.9 and 0.5 as Experimental Example 57 and Experimental Example 58, with different pore size ratios, and use a non-porous magnetic oxide film body 10 with a thickness of 0.5 mm as Comparative Example 13.

[0059] As Figure 19 shown, both Experimental Example 57 and Experimental Example 58 show that the electromagnetic loss film 1 with the electromagnetic loss structure 20 can achieve an increase in the absorption range of the magnetic response absorption peak and has the characteristic of generating more absorption peaks.

[0060] Figure 20 It is a frequency-attenuation wave frequency diagram applied to actual products. As Figure 20 shown, in this Experimental Example 59, the electromagnetic loss film 1 adopts the structure of the third embodiment, selects a magnetic response frequency of 50 GHz, uses a magnetic oxide film body 10 with a thickness of 0.15 mm, and its opening is square with a side length of 0.29 mm and a hole spacing D of 0.49 mm, and is coated on the product as a sample. The products include chips, electronic components, antennas, RADARs, printed circuit boards and related components, buildings, etc., but are not limited to the above. At the same time, a non-opening magnetic oxide film body 10 with a thickness of 0.15 mm is used as Comparative Example 14 for comparison. The measurement method specifically uses the system for measuring the wave frequency of the electronic product (TeraFlash pro system of Toptica company, using THz time-domain spectroscopy (TDS)) to measure the attenuation characteristics of the sample.

[0061] As Figure 20 shown, in addition to the absorption characteristics at 50 GHz, good absorption effects are particularly generated at 60 - 250 GHz.

[0062] In the experiments of the discloser, the electromagnetic loss film 1 with the electromagnetic loss structure 20 has better effects than those without the electromagnetic loss structure 20 in different embodiments. For different electronic devices or the magnetic response frequency ranges of large equipment, the commonly selected frequency bands are 3 MHz to 0.03 GHz, 0.03 GHz to 0.3 GHz, 0.3 GHz to 1 GHz, 1 GHz to 2 GHz, 2 GHz to 4 GHz, 4 GHz to 8 GHz, 8 GHz to 12 GHz, 12 GHz to 18 GHz, 18 GHz to 27 GHz, 27 GHz to 40 GHz, 40 GHz to 75 GHz, 75 GHz to 110 GHz, 110 GHz to 300 GHz, etc.

[0063] In summary, in some embodiments, by forming the electromagnetic loss structure 20 on the magnetic oxide film body 10, absorption peaks in other frequency bands can be generated in addition to the magnetic response absorption peak, thereby expanding the absorption frequency band of electromagnetic waves and greatly increasing the practical feasibility. When the magnetic response frequency is appropriately selected, electromagnetic wave interference can be effectively avoided, thereby solving the problems in the prior art.

[0064] Although the technical content of this disclosure has been disclosed above in preferred embodiments, it is not intended to limit this disclosure. Any person familiar with this art who makes some modifications and refinements without departing from the spirit of this disclosure should be covered within the scope of this disclosure. Therefore, the protection scope of this disclosure should be defined by the appended claims.

Claims

1. An electromagnetic loss film, comprising: A magnetic oxide film body corresponding to a magnetic response frequency (FR), wherein the magnetic response frequency is in the range of 0.1 MHz ≤ FR ≤ 300 GHz; and A plurality of electromagnetic loss structures are formed on the magnetic oxide film body, wherein the plurality of electromagnetic loss structures penetrate or are recessed in the magnetic oxide film body, and each of the electromagnetic loss structures has a long diameter; The major diameter is N1×light speed / FR, 0.005≤N1≤1, and the spacing between the plurality of electromagnetic loss structures is N2×light speed / FR, 0.005≤N2≤1, and N1 <N2。 2 . The electromagnetic loss film as claimed in claim 1 , wherein the major diameter of the plurality of electromagnetic loss structures and the spacing between the plurality of electromagnetic loss structures further have a relationship of 0.1≤N1 / N2<1. 3 . The electromagnetic loss film as claimed in claim 1 , wherein each of the electromagnetic loss structures is a hole penetrating the magnetic oxide film body or a blind hole recessed in the magnetic oxide film body. The electromagnetic loss film as claimed in claim 3 , wherein the hole is circular, elliptical, or rectangular. 5 . The electromagnetic loss film as claimed in claim 3 , wherein the blind hole is a cylindrical blind hole, a hemispherical blind hole, a semi-elliptical blind hole, or a square column blind hole.

6. The electromagnetic loss film as claimed in claim 1, wherein the magnetic oxide film body is selected from the group consisting of iron oxide, cobalt oxide, nickel oxide, manganese oxide and oxides of iron, cobalt, nickel and manganese alloys. 7 . The electromagnetic loss film as claimed in claim 1 , further comprising an adhesive film layer, wherein the adhesive film layer is attached to a surface of the magnetic oxide film body. 8 . The electromagnetic loss film as claimed in claim 1 , further comprising a metal layer, wherein the metal layer is attached to a surface of the magnetic oxide film body.

9. An electromagnetic loss composite structure, comprising: a first electromagnetic loss film; and A second electromagnetic loss film is located on the first electromagnetic loss film; The first electromagnetic lossy film and the second electromagnetic lossy film respectively include a magnetic oxide film body and a plurality of electromagnetic lossy structures, wherein the magnetic oxide film body corresponds to a magnetic response frequency (FR), wherein the range of the magnetic response frequency is 0.1 MHz ≤ FR ≤ 300 GHz; the plurality of electromagnetic lossy structures penetrate or are recessed in the magnetic oxide film body, and each of the electromagnetic lossy structures has a long diameter; the long diameter is N1×light speed / FR, 0.005≤N1≤1, and the spacing between the plurality of electromagnetic lossy structures is N2×light speed / FR, 0.005≤N2≤1, and N1 <N2。 10 . The electromagnetic lossy composite structure as claimed in claim 9 , further comprising a metal layer, wherein the metal layer is located between the first electromagnetic lossy film and the second electromagnetic lossy film. 11 . The electromagnetic lossy composite structure as claimed in claim 9 , wherein the major diameter of the plurality of electromagnetic lossy structures and the spacing between the plurality of electromagnetic lossy structures further have a relationship of 0.1≤N1 / N2<1. 12 . The electromagnetic lossy composite structure as claimed in claim 9 , wherein each of the electromagnetic lossy structures is a hole penetrating the magnetic oxide film body or a blind hole recessed in the magnetic oxide film body. 13 . The electromagnetic lossy composite structure as claimed in claim 12 , wherein the hole is circular, elliptical, or rectangular. 14 . The electromagnetic loss composite structure as claimed in claim 12 , wherein the blind hole is a cylindrical blind hole, a hemispherical blind hole, a semi-elliptical blind hole, or a square column blind hole. 15 . The electromagnetic lossy composite structure as claimed in claim 9 , wherein the first electromagnetic lossy film and the second electromagnetic lossy film correspond to different magnetic response frequencies. 16 . The electromagnetic lossy composite structure as claimed in claim 9 , wherein the electromagnetic lossy structures in the first electromagnetic lossy film and the second electromagnetic lossy film have different shapes. 17 . The electromagnetic lossy composite structure as claimed in claim 9 , wherein the major diameters or the spacings between the plurality of electromagnetic lossy structures in the first electromagnetic lossy film and the second electromagnetic lossy film are different.

18. The electromagnetic loss composite structure as described in claim 17, wherein when the long diameters of the multiple electromagnetic loss structures in the first electromagnetic loss film and the second electromagnetic loss film are different, the larger long diameter is defined as R and the smaller long diameter is defined as R1, R is N1×speed of light / FR, where 0.005≤N1≤1, and R1 is N1×N3×speed of light / FR, where 0.1≤N3≤1.

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