JP3252974B2 - Method for producing organic resin having electromagnetic wave absorbing material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing an organic resin having electromagnetic wave absorbing material.

[0002]

2. Description of the Related Art FIG. 5 is a view showing a structure of a conventional organic resin having a powdery electromagnetic wave absorbing material and a method of manufacturing the same. As the conventional organic resin having a powdery electromagnetic wave absorbing material, there is an organic resin containing ferrite powder, an organic resin containing carbon powder, and the like. The structure of these organic resins is a structure in which the distribution density of the powdery electromagnetic wave absorbing material is substantially uniform. As a method for manufacturing these organic resins, as shown in FIG. 5 , a liquid or film-like organic resin 603 containing a powdered electromagnetic wave absorbing material 602 in advance is applied onto an arbitrary insulator substrate 601 and
A method of manufacturing by heating and curing is employed.

[0003]

However, in the conventional organic resin having a powdery electromagnetic wave absorbing material,
Since the distribution density of the electromagnetic wave absorbing material is substantially uniform, the electromagnetic wave absorbing characteristics of the organic resin are substantially uniform throughout the resin. Therefore, when realizing portions exhibiting electromagnetic wave absorption characteristics in different frequency regions within the organic resin, or realizing portions having different amounts of electromagnetic wave absorption in the same frequency region, at least two types exhibiting different electromagnetic wave absorption characteristics are used. The above organic resins must be laminated or laminated. Therefore, there is a problem that not only the number of manufacturing steps is increased and complicated, but also the cost required for these is increased. Further, there is a problem that the apparatus is not suitable for miniaturization.

[0004] It is an object of the present invention to provide a distribution density of electromagnetic wave absorbing material .
It is to propose a simple manufacturing method for realizing the organic resin of varying degrees.

[0005]

[0006]

[0007]

[0008]

According to the present invention, a powdery electromagnetic wave absorbing material is sprayed onto an arbitrary insulating substrate from above a liquid organic resin, and a gap between the insulating substrate and the electromagnetic wave absorbing material is formed. In addition, by applying an electric or magnetic field, the injection trajectory of the electromagnetic wave absorbing material is controlled, the distribution density of the material when reaching the liquid organic resin is changed, and then, the material is cured by heating. This is a method for producing an organic resin having an electromagnetic wave absorbing material .

Further, according to the present invention, a powdery organic resin and a powdery electromagnetic wave absorbing material are sprayed from above an arbitrary insulating substrate, and an electric field or an electromagnetic field is applied between the insulating substrate and the electromagnetic wave absorbing material. By applying a magnetic field, the injection trajectory of the electromagnetic wave absorbing material is controlled, the organic resin and the electromagnetic wave absorbing material are laminated on an insulating substrate, and the distribution density of the electromagnetic wave absorbing material with respect to the organic resin is changed. This is a method for producing an organic resin having an electromagnetic wave absorbing material, which is characterized in that the organic resin is heated and cured later.

[0010] ie, in the present invention is a manufacturing <br/> organic resin having a powdered electromagnetic wave absorption material formed on an insulating substrate, by applying an electric field or a magnetic field, in the organic the resin The above-mentioned problem is solved by changing the distribution density of the electromagnetic wave absorbing material to obtain a structure of an organic resin exhibiting desired electromagnetic wave absorbing characteristics.

[0011]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples. Embodiment 1 FIG. 1 is a view showing a structure of an organic resin having a powdery electromagnetic wave absorbing material according to the present invention, and shows an arbitrary insulating substrate 1.
This is a structure of the organic resin in which the distribution density of the powdery electromagnetic wave absorbing material 102 in the organic resin 103 formed on the substrate 01 changes continuously as shown by a curve 104.

Hereinafter, an example of a manufacturing method for realizing this structure will be described .

[0013] and manufacturing method Example 1 FIG. 3 is a diagram showing a first manufacturing method example for realizing the structure shown in FIG. A powdery electromagnetic wave absorbing material 402 is sprayed from above an arbitrary insulating substrate 401 (see (a)) coated with a liquid organic resin 403. Here, it is assumed that the electromagnetic wave absorbing material 402 is negatively charged. At this time, the insulator substrate 401 and the electromagnetic wave absorbing material 402
By applying the electric field E in parallel with the direction in which the distribution density of the electromagnetic wave absorbing material 402 is changed, the injection trajectory of the electromagnetic wave absorbing material 402 is controlled to move in the positive direction of the electric field E ((( b)). Alternatively, the magnetic field H is perpendicular to the direction in which the distribution density of the electromagnetic wave absorbing material 402 is changed.
Is controlled so as to move the ejection trajectory of the electromagnetic wave absorbing material 402 in a direction perpendicular to the magnetic field H applied from the front to the back of the paper (see (b)). This allows
Electromagnetic wave absorbing material 4 when it reaches liquid organic resin 403
02 continuously changes (see (c)), and then the organic resin 403 is cured by heating to produce an organic resin having a desired electromagnetic wave absorption characteristic distribution. The electromagnetic wave absorption characteristics of the organic resin formed by this method are as shown by a curve 408 (see (d)).

When the electromagnetic wave absorbing material 402 is positively charged, the characteristics shown by the curve 408 can be obtained by applying the electric field E or the magnetic field H in opposite directions. And manufacturing method Example 2 FIG. 4 is a diagram showing a second manufacturing method example for realizing the structure shown in FIG. A powdery organic resin 513 and a powdery electromagnetic wave absorbing material 502 are sprayed from above an arbitrary insulator substrate 501. Here, the electromagnetic wave absorbing material 50
2 is negatively charged, and the organic resin 513 is electrically neutral. At this time, by applying an electric field E between the insulator substrate 501 and the electromagnetic wave absorbing material 502 in a direction parallel to the direction in which the distribution density of the electromagnetic wave absorbing material 502 is changed, the ejection trajectory of the electromagnetic wave absorbing material 502 is changed. Control is performed so as to move in the positive direction (see (a)). Alternatively, by applying a magnetic field H perpendicular to the direction in which the distribution density of the electromagnetic wave absorbing material 502 is changed, the ejection trajectory of the electromagnetic wave absorbing material 502 can be changed from the front to the back of the paper.
Is controlled so as to move in a direction perpendicular to the direction (see (a)). Thereby, the organic resin 51 is deposited on the insulator substrate 501.
3 and the electromagnetic wave absorbing material 502 are laminated, and the distribution density of the electromagnetic wave absorbing material 502 with respect to the organic resin 511 changes continuously (see (b)). Thereafter, the organic resin 511 is heated and cured to obtain desired electromagnetic wave absorbing characteristics. An organic resin exhibiting distribution is produced. The electromagnetic wave absorption characteristics of the organic resin formed by this method are as shown by a curve 508 (see (c)). Example 2 FIG. 2 is a view showing another structure of an organic resin having a powdery electromagnetic wave absorbing material according to the present invention, and shows a powdery organic resin 203 formed on an arbitrary insulating substrate 201. This is a structure of the organic resin in which the electromagnetic wave absorbing material 202 is partially distributed in the plane of the organic resin 203. In FIG. 2, the distribution density of the electromagnetic wave absorbing material 202 between A and B is as shown by a curve 204.

The manufacturing method for realizing this structure is substantially the same as the manufacturing methods 1 and 2 of the first embodiment, and the distribution density of the powdery electromagnetic wave absorbing material 202 is partially reduced. Therefore, the injection source of the electromagnetic wave absorbing material 202 may be limited to a few nozzles, or a mask corresponding to the distribution density of the electromagnetic wave absorbing material 202 may be provided on or above the insulating substrate, and then the injection may be performed. .

[0016]

As described above, according to the present invention,
Using only one type of organic resin having a powdery electromagnetic wave absorbing material, manufacturing a part of the organic resin that shows electromagnetic wave absorption characteristics in different frequency ranges or a part with the same amount of electromagnetic wave absorption in the same frequency range It can be realized by a process. In addition, manufacturing costs are reduced,
Also suitable for miniaturization of equipment.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an example of the structure of an organic resin having a powdery electromagnetic wave absorbing material according to the present invention.

FIG. 2 is a conceptual diagram showing another example of the structure of an organic resin having a powdery electromagnetic wave absorbing material according to the present invention.

FIG. 3 is an explanatory view showing a first example of a manufacturing method for realizing the structure shown in FIG. 1;

FIG. 4 is an explanatory view showing a second example of a manufacturing method for realizing the structure shown in FIG. 1;

FIG. 5 shows a conventional organic tree having a powdery electromagnetic wave absorbing material.
It is a conceptual diagram which shows the structure of fat and its manufacturing method.

[Explanation of symbols]

101 , 201 , 401 , 501 , 601 Insulating substrate 102 , 202 , 402 , 502 , 602 Powdered electromagnetic wave absorbing material 103 , 203 , 403 , 603 Liquid organic resin 513 Powdered organic resin 104, 204 Powdered curve representing the curve 4 08,508 electromagnetic wave absorption characteristics representing the distribution density of the electromagnetic wave absorbing material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-91997 (JP, A) JP-A-63-141397 (JP, A) JP-A-3-217082 (JP, A) JP-A-59-1984 230714 (JP, A) JP-A-2-254798 (JP, A) JP-A-62-112400 (JP, A) JP-A-3-259599 (JP, A) JP-A-61-189699 (JP, A) JP-A-1-220899 (JP, A) JP-A-56-53156 (JP, A) JP-A-54-53148 (JP, A) JP-A-3-44100 (JP, A) JP-A-1-292896 (JP, A) JP-A-2-55129 (JP, A) JP-A-59-110199 (JP, A) JP-A-64-13197 (JP, U) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) H01Q 17/00 B32B 7/02 104 C09D 5/00-5/32 H05K 9/00 H01F 1/12

Claims (2)

(57) [Claims] 1. An electromagnetic wave absorbing material in a powder form is sprayed onto an arbitrary insulating substrate from above a liquid organic resin, and an electric field or a magnetic field is applied between the insulating substrate and the electromagnetic wave absorbing material. By controlling the ejection trajectory of the electromagnetic wave absorbing material, changing the distribution density of the material when it reaches the liquid organic resin, and thereafter, heating and curing, the organic resin having the electromagnetic wave absorbing material Manufacturing method. 2. A powdery organic resin and a powdery electromagnetic wave absorbing material are sprayed from above an arbitrary insulating substrate, and an electric field or a magnetic field is applied between the insulating substrate and the electromagnetic wave absorbing material. By controlling the ejection trajectory of the electromagnetic wave absorbing material, the organic resin and the electromagnetic wave absorbing material are laminated on an insulating substrate, the distribution density of the electromagnetic wave absorbing material with respect to the organic resin is changed, and then, heat curing is performed. A method for producing an organic resin having an electromagnetic wave absorbing material.