Method for forming of EMI filter

专利摘要:
PURPOSE: A method for manufacturing electromagnetic interference shielding filter is provided to achieve improved performance of filter and reduce manufacturing costs by improving damping factor required for an electromagnetic interference shielding filter. CONSTITUTION: A method is characterized in that a mesh-type protruded structure made of a conductive material is formed by a printing method through transcription, at a surface of a base substrate. The printing method through transcription, comprises the steps of forming a mesh-type groove into a desired depth at a surface of a substrate; filling the mesh-type groove with a paste material; removing the paste material from the portion excluding the groove; transcribing the paste material filling the groove, at the surface of a press unit by positioning the press unit to the surface of the substrate, applying a pressure and separating the press unit; and transcribing the mesh shape and mesh material formed in the groove, to the base substrate, by positioning the paste material transcribed at the surface of the press unit, to the base substrate, applying a pressure and separating the press unit.
公开号:KR20020076899A
申请号:KR1020010017108
申请日:2001-03-31
公开日:2002-10-11
发明作者:서용운；조상무；김윤택；정희섭
申请人:아이티엠 주식회사；
IPC主号:

专利说明:

Electromagnetic shielding filter manufacturing method {Method for forming of EMI filter}
[4] The present invention relates to a method of manufacturing an electromagnetic shielding filter for blocking harmful electromagnetic waves (EMI) emitted from electronic products.
[5] Conventional electromagnetic wave shielding filters are manufactured using a thin mesh or a transparent conductive film. However, in order to improve the visible light transmittance while having a function as a satisfactory electromagnetic wave filter, such a conventional electromagnetic wave shielding filter has to be made of a mesh having a thickness of about several microns (um) in the width of several tens of microns. The same mesh was very difficult to manufacture and had a very high manufacturing cost. In addition, in the case of the transparent conductive film, the thickness of the film must be increased in order to increase the conductivity. However, when the film is thick, the visible light transmittance is remarkably decreased, and it is very difficult to make a thin transparent conductive film with good conductive properties.
[6] The present invention provides a simple and mass-produced manufacturing process even at a low manufacturing cost in order to overcome the disadvantages of the prior art as described above, and the electromagnetic shielding filter that can vary the shape and size of the structure as desired by the user The purpose is to show how to produce.
[7] Particularly, in the present invention, by forming and attaching a mesh structure having excellent conductivity at a sparse interval on a thin transparent conductive film having high visible light transmittance, the transparent conductive film and the mesh independently function as an electromagnetic shielding filter, respectively, When the mesh is formed on the transparent conductive film, the electrical conductivity of the transparent conductive film can be improved, so that the filter function itself of the transparent conductive film can be improved. Therefore, the attenuation rate required for the electromagnetic wave filter can be sufficiently improved to improve the function of the filter as well as reduce the manufacturing cost.
[1] 1 is a block diagram of an electromagnetic shielding filter manufactured according to the present invention.
[2] 2 is a step-by-step process chart for forming a mesh protruding structure on a base substrate on which a transparent conductive film is formed according to the present invention.
[3] 3 is an embodiment of an apparatus for implementing a method for manufacturing an electromagnetic shielding filter according to the present invention.
[8] Method for producing an electromagnetic shielding filter according to the present invention,
[9] A mesh-type protruding structure made of a conductive material is formed on one surface of the base substrate by a printing method by transcription.
[10] The printing method by the transfer,
[11] Forming a groove having a mesh shape to a desired depth to have a size and an inner shape of the mesh to be formed on one surface of the first substrate;
[12] Completely filling the formed groove with the mesh forming paste material to be formed in the groove;
[13] Removing the paste material remaining on the portion of the first substrate on which the groove is formed other than the groove;
[14] When the pressure is applied, the pressing means having flexibility and elasticity enough to squeeze out the mesh-forming paste material filled in the grooves is placed on one side of the first substrate on which the grooves are formed. Transferring the pasty material filled in the groove onto the surface of the pressing means;
[15] The mesh forming paste material transferred on the surface of the pressing means is finally placed on the base substrate to be formed, and then applied by pressure and peeled off, thereby transferring the mesh shape and the mesh material formed inside the groove onto the base substrate. It comprises a step.
[16] In addition, the step of forming the mesh-like protrusion structure,
[17] After forming the groove on the first substrate, it is possible to add a step of flattening the surface of the grooved surface to remove the curved gradient along the surface or to remove the rough portion of the surface.
[18] In addition, the step of forming the mesh-like protrusion structure,
[19] It is possible to add a step of electroless plating on the groove inner surface in order to prevent corrosion of the groove inner surface by the paste and to pull the paste material out of the groove without deformation of the groove by the pressing means.
[20] In addition, the electromagnetic shielding filter manufacturing method,
[21] Forming a transparent conductive film on the underside of the surface of the base substrate on which the mesh-shaped protrusion structure is formed, or forming a transparent conductive film on the other side of the base substrate which is symmetrical to the surface on which the mesh-shaped protrusion structure is formed. It is possible to enhance the electromagnetic shielding function, including.
[22] When the mesh type protruding structure is formed on the transparent conductive film, it may be formed to be in direct contact with the transparent conductive film or may be formed by placing an intermediate layer in between. The intermediate layer may be an insulating film for preventing reflection.
[23] 1 is a state diagram in which the mesh-like protrusion structure is formed on a base substrate and a transparent conductive film formed on the base substrate.
[24] In addition, when the mesh-like protrusion structure is formed to be in direct contact with the transparent conductive film,
[25] A thin transparent conductive film is formed on the base substrate to increase the transmittance of visible light, and a thin mesh is formed on the transparent conductive film to have a better electrical conductivity or magnetic property than the transparent conductive film to compensate for the poor electrical conductivity. It is preferable to form the protrusion structure, and determine the density of the mesh so that free electrons can be supplied from the mesh protrusion structure to the adjacent transparent conductive film to increase the electrical conductivity of the transparent conductive film by a desired value. In other words, it is possible to obtain the greatest effect of the present invention, which does not require the use of expensive existing dense meshes while also improving the characteristics of electromagnetic wave shielding.
[26] The step of forming the mesh-like protrusion structure as described above is illustrated in FIG.
[27] On the other hand, as an embodiment of the method for manufacturing an electromagnetic shielding filter according to the present invention is possible the following applications.
[28] That is, to manufacture the electromagnetic shielding filter according to the present invention,
[29] Manufacturing the first substrate and the pressing means into a cylindrical shape, each of which rotates by a parallel axis of rotation;
[30] Arranging the pressing means at the lower end of the first substrate and placing the base substrate on which the transparent conductive film is formed at the lower end of the pressing means;
[31] While the mesh forming paste material is injected into the groove formed on the surface of the first substrate from the upper portion of the first substrate, the cylindrical substrate is rotated and the cylindrical pressing means is rotated to fill the inside of the groove of the first substrate. Firstly transferring the mesh forming paste material onto the surface of the pressing means;
[32] By rotating the pressing means and simultaneously moving the base substrate in one direction, the paste material transferred on the surface of the pressing means is secondarily transferred onto the transparent conductive film of the base substrate to form a mesh structure.
[33] 3 shows a device structure diagram for manufacturing according to the embodiment.
[34] The manufacturing method of the electromagnetic wave shielding filter according to the present invention is applicable to all electronic products, in particular, it is effective to apply to the electromagnetic wave shielding filter for shielding the electromagnetic wave emitted from the plasma display panel.
[35] The present invention has the advantage of low manufacturing cost, simple manufacturing process, excellent mass productivity and reproducibility, and can change the shape and size of the structure as desired by the user.
[36] Particularly, in the present invention, by forming and attaching a mesh structure having excellent conductivity at a sparse interval on a thin transparent conductive film having high visible light transmittance, the transparent conductive film and the mesh independently function as an electromagnetic shielding filter, respectively, When the mesh is formed on the transparent conductive film, the electrical conductivity of the transparent conductive film can be improved, so that the filter function itself of the transparent conductive film can be improved. Therefore, the attenuation rate required by the electromagnetic wave filter can be sufficiently improved, and the manufacturing cost can be reduced as well as the function of the filter is improved.

权利要求:
Claims (9)
[1" claim-type="Currently amended] In the method of manufacturing an electromagnetic shielding filter for blocking harmful electromagnetic waves emitted from electrical and electronic products,
A method of manufacturing an electromagnetic shielding filter, characterized in that a mesh-type protruding structure made of a conductive material is formed on one surface of a base substrate by a printing method by transcription.
[2" claim-type="Currently amended] The printing method according to claim 1, wherein
Forming a groove in a mesh shape to a desired depth to have a size and an inner shape of a mesh to be formed on one surface of the first substrate;
Completely filling the formed groove with the mesh forming paste material to be formed;
Removing the paste material remaining on the portion of the first substrate having grooves other than the groove on one side thereof;
When the pressure is applied, the pressing means having flexibility and elasticity enough to squeeze out the mesh-forming paste material filled in the grooves is placed on one side of the first substrate on which the grooves are formed. Transferring the pasty material filled in the groove onto the surface of the pressing means;
The mesh forming paste material transferred on the surface of the pressing means is finally placed on the base substrate to be formed, and then applied by pressure and peeled off, thereby transferring the mesh shape and the mesh material formed inside the groove onto the base substrate. Comprising the step of, electromagnetic shielding filter manufacturing method.
[3" claim-type="Currently amended] The method of claim 2, wherein the forming of the mesh-like protrusion structure,
And forming a groove on the first substrate, and then planarizing the surface of the grooved surface to remove a bend gradient along the surface or to remove a rough portion of the surface.
[4" claim-type="Currently amended] The method of claim 3, wherein the forming of the mesh-like protrusion structure,
In order to prevent corrosion of the inner surface of the grooves by the paste and to remove the paste material from the grooves without deformation of the shape by the pressing means, an electroless plating process is added on the inner surface of the grooves. Way.
[5" claim-type="Currently amended] The method for manufacturing the electromagnetic shielding filter according to any one of claims 2 to 4,
Forming a transparent conductive film on the underside of the surface of the base substrate on which the mesh-shaped protrusion structure is formed, or forming a transparent conductive film on the other side of the base substrate which is symmetrical to the surface on which the mesh-shaped protrusion structure is formed. Characterized in that the electromagnetic shielding filter manufacturing method.
[6" claim-type="Currently amended] The method of claim 5, wherein when the mesh-like protrusion structure is formed on the transparent conductive film, the electromagnetic wave shielding filter is manufactured so as to be in direct contact with the transparent conductive film or having an intermediate layer in between. Way.
[7" claim-type="Currently amended] The method of claim 6, wherein the intermediate layer is an insulating film for preventing reflection.
[8" claim-type="Currently amended] According to claim 6, The electromagnetic shielding filter manufacturing method,
Manufacturing the first substrate and the pressing means into a cylindrical shape, each of which rotates by a parallel axis of rotation; and
Disposing a pressing means at a lower end of the first substrate and at the same time disposing a base substrate having a transparent conductive film formed thereon or not having a transparent conductive film formed at the lower end of the pressing means;
While the mesh forming paste material is injected into the groove formed on the surface of the first substrate from the upper portion of the first substrate, the cylindrical substrate is rotated and the cylindrical pressing means is rotated to fill the inside of the groove of the first substrate. Firstly transferring the mesh forming paste material onto the surface of the pressing means;
And secondly transferring the paste material transferred on the surface of the pressing means onto the transparent conductive film of the base substrate by rotating the pressing means and simultaneously moving the base substrate in one direction. Manufacturing method.
[9" claim-type="Currently amended] The method of claim 6, wherein when the mesh-like protruding structure is formed in direct contact with the transparent conductive film,
Forming a thin transparent conductive film having a high visible light transmittance on the base substrate; and
On the transparent conductive film, a mesh-type protrusion structure is formed of a material having better electrical conductivity or magnetic properties than the transparent conductive film, and free electrons are supplied from the mesh-type protrusion structure to an adjacent transparent conductive film, thereby electrically conducting the transparent conductive film by a desired value. Method for producing an electromagnetic shielding filter, characterized in that consisting of the step of forming and determining the density of the mesh to increase the characteristics.

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同族专利:

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引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2001-03-31|Application filed by 아이티엠 주식회사

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2001-03-31|Priority to KR1020010017108A

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2002-10-11|Publication of KR20020076899A

优先权:

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申请号 | 申请日 | 专利标题

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KR1020010017108A|KR20020076899A|2001-03-31|2001-03-31|Method for forming of EMI filter|