KR101229058B1 - Film for shielding electromagnetic wave and radiating heat of cellular phone - Google Patents

Abstract

PURPOSE: An electromagnetic shielding and heat releasing film for mobile phones is provided to completely absorb electromagnetic waves by attaching a copper-coated film layer to the rear surface of a mobile phone. CONSTITUTION: A heat releasing tape layer is attached to the rear surface of a mobile phone. A copper-coated film layer(12) is formed at the rear surface of the heat releasing tape layer. The copper-coated film layer blocks electromagnetic waves and releases internal heat of the mobile phone to the outside at the same time. A base layer(13) is formed at the rear surface of the copper-coated film layer. A hard-coated layer(14) is formed at the bottom surface of the base layer.

Description

Film for cell phone electromagnetic wave blocking and heat dissipation {FILM FOR SHIELDING ELECTROMAGNETIC WAVE AND RADIATING HEAT OF CELLULAR PHONE}

The present invention relates to a film for cell phone electromagnetic wave shielding and heat dissipation, and more specifically, by forming a copper foil film layer or graphene layer for electromagnetic shielding and heat emission on the base film layer to attach to the back of the mobile phone, The present invention relates to a mobile phone electromagnetic wave blocking and heat dissipation film that can not only completely absorb or extinguish electromagnetic waves generated from a mobile phone, but also easily dissipate high heat generated from a mobile phone to the outside.

In general, an electromagnetic wave is a form of energy generated by the use of electricity and is a synthesized wave of an electric field and a magnetic field. These electromagnetic waves are classified into γ-ray (gamma ray), X-ray, ultraviolet ray, visible light (light), infrared ray, radio wave (ultra high frequency, high frequency, low frequency, ultra low frequency), microwave in order of high frequency. Can be. In other words, radio waves are a kind of electromagnetic waves, whose frequency is less than 3000 GHz (three trillion vibrations per second), and have become indispensable in daily life.

In particular, recently, mobile devices such as mobile phones emit a large amount of electromagnetic waves in the form of radio waves for communication with a base station through an antenna and a main body mounted inside the device. Although controversial, it is a general opinion that it is harmful to the human body.

The criteria for the effect of electromagnetic waves on the human body is the Specific Absorption Rate (SAR), that is, the degree to which the human body absorbs electromagnetic waves per unit mass (W / kg). Each country regulates that the absorption rate of electromagnetic waves in the head of the human body does not exceed the standard.

In particular, in 1998, the Federal Communications Commission (FCC) enacted the regulation of electromagnetic wave effects on mobile phones, and has now regulated and enforced regulations in many countries around the world, including Korea. SAR limit of 1.6W / kg in Europe and 2.0W / kg in Japan and Japan)

Therefore, people facing television sets, computers, and those who frequently use cell phones for several hours a day have to block electromagnetic waves to take care of their health from harmful electromagnetic waves.

In order to block electromagnetic waves of a conventional mobile phone, a mobile phone cover in which an electromagnetic shielding body having a conductive metal or a conductive metal material is laminated is laminated between an opaque synthetic resin and an opaque synthetic resin fabric. Absorption or extinguishment has a limit, and because it is manufactured as a separate cover, there is a cumbersome point in manufacturing.

In addition, conventionally, a film for blocking and dissipating a mobile phone, which can easily discharge high heat generated from a mobile phone to the outside as well as blocking of electromagnetic waves, has not been proposed at all.

Accordingly, the present invention has been made in view of the above problems, an object of the present invention, by forming a copper foil film layer or graphene layer for electromagnetic shielding and heat emission on the base film layer to form an adhesion to the back of the mobile phone In addition, it is possible to completely absorb or dissipate the electromagnetic waves generated from the mobile phone when using the mobile phone, and to provide a film for the electromagnetic wave shielding and heat dissipation that can easily dissipate high heat generated from the mobile phone to the outside.

Another object of the present invention is to improve the heat dissipation to the outside by using a silicone heat dissipation tape as an adhesive for attaching to the back of the mobile phone, as well as high thermal conductivity coefficient (K> 0.6 W / mK) And low thermal resistance, uniform heat dissipation effect (temperature uniformity) and ease of operation, electrical insulation according to the requirements of use, mechanical strength (shear, tensile strength) against high temperatures and maintenance of adhesion to high temperatures. It is to provide a film for excellent electromagnetic shielding and heat dissipation.

Cell phone electromagnetic wave blocking and heat dissipation film according to the present invention for achieving the above object, the heat radiation tape layer is attached to the back of the mobile phone, and the copper foil film layer for electromagnetic wave blocking and heat dissipation formed on the rear of the heat dissipation tape layer It is characterized by consisting of a pin layer and a base layer formed on the rear surface of the copper foil film layer.

Here, the heat radiation tape is preferably a silicon heat radiation tape.

In addition, the base layer is preferably a synthetic resin film, paper, nonwoven fabric, glass or metal.

In addition, a hard coating layer is further formed on the lower surface of the base layer, and the hard coating layer is formed by applying a composition including a UV curable compound, an initiator and a UV stabilizer and curing the UV curable compound, wherein the UV curable compound is an epoxy acrylate compound, It is preferable that they are any of a polyester acrylate type compound, a urethane acrylate type compound, a polybutadiene acrylate type compound, and an alkyl acrylate type compound.

In addition, the copper foil film layer is preferably formed by sputtering at least one mixture selected from the group consisting of copper, zinc, aluminum and manganese.

In addition, the graphene layer is preferably formed by chemical vapor deposition on the base layer.

As described above, according to the new concept cell phone electromagnetic wave shielding and heat dissipation film according to the present invention, by forming a copper foil film layer or graphene layer for shielding and heat emission of the electromagnetic wave on the base film layer by attaching to the back of the mobile phone In addition, it is possible to completely absorb or dissipate the electromagnetic waves generated from the mobile phone when using the mobile phone, and to easily dissipate high heat generated from the mobile phone to the outside, and also as an adhesive for attaching to the back of the mobile phone. By using a heat-resistant tape, not only can the heat dissipation to the outside be improved, but also a high thermal conductivity coefficient (K> 0.6 W / mK), low heat resistance, uniform heat dissipation effect (temperature uniformity) and Ease of operation, electrical insulation according to the requirements of use, mechanical strength (shear, tensile strength) against high temperatures and adhesion to high temperatures It has a better effect in terms of holding.

1 is a schematic separation perspective view of a mobile phone to which a film for cell phone electromagnetic wave shielding and heat dissipation according to the present invention is applied.
Figure 2 is a state attached to the mobile phone electromagnetic wave blocking and heat dissipation film according to the present invention.
3 is a block diagram of a mobile phone electromagnetic wave blocking and heat dissipation film according to the present invention.
Figure 4 is a block diagram of a film for blocking and radiating the mobile phone electromagnetic waves according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order that the present invention may be easily understood by those skilled in the art. .

1 is a schematic separation perspective view of a mobile phone to which the mobile phone electromagnetic wave blocking and heat dissipation film according to the present invention is applied, FIG. 2 is a state diagram in which the mobile phone electromagnetic wave blocking and heat dissipation film is attached according to the present invention, and FIG. According to the configuration of the cell phone electromagnetic wave shielding and heat dissipation according to, it will be described together for convenience.

As shown, the mobile phone electromagnetic wave shielding and heat dissipation film 10 according to the present invention, the heat radiation tape layer 11 is attached to the back of the mobile phone 20, and the electromagnetic wave formed on the back of the heat radiation tape 11 layer It consists of a copper foil film layer 12 for blocking and heat dissipation, and a base layer 13 formed on the rear surface of the copper foil film layer 12.

Here, the mobile phone to which the mobile phone electromagnetic wave shielding and heat dissipation film 10 according to the present invention is a PDA (Personal Digital Assistant), smart phone (Smartphone), netbook, hand held (hand held) PC, MP3 / MP4 player, game machine In the present invention, all of the above devices will be referred to as a mobile phone.

In addition, in the illustrated example, the mobile phone electromagnetic wave shielding and heat dissipation film 10 according to the present invention is shown attached to the entire back of the mobile phone 20, but is limited to only the battery forming region of the back of the mobile phone Of course you can.

The base layer 13 is a copper foil film layer 12 and the heat-radiating tape layer 11 is formed on the upper surface thereof, as described later, preferably in the form of a base film (synthetic resin) as an example of such a base film Film, paper, nonwoven fabric, glass or metal. In the present invention, it is more preferable to use the above synthetic resin film having heat resistance, and examples of such a film include a polyester film (ex. PET film), polyvinyl chloride and polyvinylidene chloride film, but the present invention. It does not limit the kind to.

The copper foil film layer 12 is a core layer for rapidly shielding electromagnetic waves and rapidly dissipating heat inside the mobile phone to the outside, and sputtering onto the base layer 13 using copper as a main material. The method is used to form an electromagnetic shielding and heat dissipating film.

The sputtering method is a method of forming a thin film using the phenomenon that the particles having a high energy collide with the target copper, and the copper atoms are released when transferring energy. Such sputtering is carried out in an inert gas (ex.

By introducing a voltage between the deposited substrate and the target, while introducing the generated ions into the target.

On the other hand, the copper foil film layer 12 according to the present invention may be formed by the above-described sputtering method, not only copper, but also at least one mixture selected from the group consisting of nickel, zinc, aluminum, and manganese.

Here, when the copper foil film layer 12 is one or more mixtures selected from the group consisting of nickel, zinc, aluminum and manganese as well as copper, it is preferable to include all of the above-listed components, and at this time, copper 60 to 80 Parts by weight; 10 to 15 parts by weight of nickel; 5 to 10 parts by weight of zinc; It is preferable to include 5 to 15 parts by weight of aluminum and 1 to 10 parts by weight of manganese, more preferably, 65 to 75 parts by weight of copper; 8 to 13 parts by weight of nickel; 7 to 9 parts by weight of zinc; 8 to 12 parts by weight of aluminum and 7 to 9 parts by weight of manganese, most preferably 69 to 71 parts by weight of copper; 10-12 parts by weight of nickel; 8 parts by weight of zinc; 10 parts by weight of aluminum and 8 parts by weight of manganese.

Moreover, it is preferable that the thickness of the said copper foil film layer 12 is 400-600 GPa. If the thickness is less than 400 mW, the electromagnetic wave shielding performance may be deteriorated. If the thickness is more than 600 mW, there may be no further increase in effect, and the economy and / or the utilization of the sheet may be deteriorated.

In this case, after mixing the target substance with each component containing the above-mentioned copper, using what was manufactured in plate shape through the rolling process etc. as a target, and using the target sputtering layer

It can carry out by employ | adopting well-known general conditions according to thickness etc.

After forming the copper foil film (deposition) layer 12 as a metal layer by the method mentioned above, the heat radiation tape layer 11 is formed in the upper surface.

The heat dissipation tape layer 11 is easily attached to the rear surface of the mobile phone 20 and increases heat dissipation to the outside, and has a high thermal conductivity (K> 0.6 W / mK), low thermal resistance, and uniform heat. Silicone heat dissipation tape is most desirable in terms of dispersing effect (temperature uniformity), ease of operation, electrical insulation according to the requirements of use, mechanical strength (shear and tensile strength) against high temperature and adhesion to high temperature. Do.

Alternatively, the hard coat layer 14 may be further formed on the lower surface of the base layer 13.

In this case, the hard coating layer 14 may protect the copper foil film layer, and may obtain an effect of improving scratch resistance, abrasion resistance, and chemical resistance to the film 10 for cell phone electromagnetic wave blocking and heat dissipation. The method of forming the hard coating layer 14 is not limited, but is preferably formed using a UV curable resin. That is, the hard coating layer 14 may be formed by applying a composition including a UV curable compound, an initiator and a UV stabilizer, and then curing. Examples of the UV curable compound that may be used include epoxy acrylate compounds, Polyester acrylate compounds, urethane acrylate compounds, polybutadiene acrylate compounds, alkyl acrylate compounds, and the like.

4 is a schematic view of a film for blocking and dissipating a mobile phone electromagnetic wave according to another exemplary embodiment of the present invention, except that the graphene layer 12a is formed instead of the copper foil film layer 12. It is the same as that, and the difference will be described.

That is, as shown in Figure 4, the mobile phone electromagnetic wave shielding and heat dissipation film 10a according to another embodiment of the present invention, the heat radiation tape layer 11 attached to the back of the mobile phone 20, and the heat radiation tape ( 11) a graphene layer 12A for blocking and dissipating electromagnetic waves formed on the rear surface of the layer, and a base layer 13 formed on the rear surface of the graphene layer 12A.

Here, the formation and the material of the heat-dissipating tape layer 11 and the base layer 13 are the same as described above, the description thereof will be omitted, and the formation of the graphene layer 12A will be described as follows. .

The graphene layer 12A for electromagnetic shielding and heat emission is not particularly limited as long as the graphene layer 12A formed on the base layer 13 substrate is a method commonly used for graphene growth in the art. For example, chemical vapor deposition may be used, but the method is not limited to the present invention.

The above-described chemical vapor deposition method is Rapid Thermal Chemical Vapor Deposition (RTCVD), Inductively Coupled Plasma-Chemical Vapor Deposition (ICP-CVD), Low Pressure Chemical Vapor Deposition. LPCVD, Atmospheric Pressure

Chemical Vapor Deposition; APCVD), Metal Organic Chemical Vapor Deposition (MOCVD), and Plasma-enhanced chemical vapor deposition (PECVD), but are not limited thereto.

Here, the formation process of the graphene layer 12A may be performed under normal pressure, low pressure, or vacuum. For example, when the process is performed under atmospheric pressure, helium (He) may be used as a carrier gas to minimize damage of graphene caused by collision with heavy argon (Ar) at high temperature. . In addition, when the process is performed under atmospheric pressure, there is an advantage that can be produced by the graphene film by a simple process at a low cost. In addition, when the process is carried out in a low pressure or vacuum conditions, using hydrogen (H2) as the atmosphere gas, and treated with increasing the temperature can be synthesized high quality graphene by reducing the oxidized surface of the metal catalyst. .

In addition, the thickness of the graphene layer 12A can be adjusted in the range of 1 to 100 layers.

While the present invention has been described in detail, it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention, but are also within the scope of the invention. You must understand.

10, 10a: mobile phone electromagnetic wave blocking and heat dissipation film according to the present invention
11: heat dissipation tape layer 12: copper foil film layer
12a: graphene layer 13: base layer
14: hard coating layer 20: mobile phone

Claims (7)

A heat radiation tape layer attached to the back of the mobile phone,
Copper foil film layer or graphene layer for shielding and radiating the electromagnetic waves formed on the rear of the heat radiation tape layer;
Consists of a base layer formed on the back of the copper film layer or graphene layer,
Cell phone electromagnetic shielding and heat dissipation film, characterized in that the hard coating layer is further formed on the lower surface of the base layer. The method of claim 1,
The heat dissipation tape is a cell phone electromagnetic shielding and heat dissipation film, characterized in that the silicone heat dissipation tape. The method of claim 1,
The base layer is a mobile phone electromagnetic wave shielding and heat dissipation film, characterized in that the synthetic resin film, paper, non-woven fabric, glass or metal. delete The method of claim 1,
The hard coating layer is formed by applying a composition comprising a UV curable compound, an initiator and a UV stabilizer and curing the UV curable compound is an epoxy acrylate compound, a polyester acrylate compound, a urethane acrylate compound, a polybutadiene Cell phone electromagnetic wave blocking and heat dissipation film, characterized in that any one of an acrylate compound, and an alkyl acrylate compound. A heat radiation tape layer attached to the back of the mobile phone,
Copper foil film layer for blocking and radiating the electromagnetic waves formed on the rear of the heat radiation tape layer;
It is made of a base layer formed on the back of the copper foil film layer,
The copper foil film layer is a film for cell phone electromagnetic shielding and heat dissipation, characterized in that formed by sputtering at least one mixture selected from the group consisting of copper, zinc, aluminum and manganese. A heat radiation tape layer attached to the back of the mobile phone,
Graphene layer for blocking and radiating the electromagnetic waves formed on the rear of the heat dissipation tape layer,
It is made of a base layer formed on the back of the graphene layer,
The graphene layer is a cell phone electromagnetic shielding and heat dissipation film, characterized in that formed on the base layer by chemical vapor deposition.

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