Patent Description:
In order to enhance the portability and convenience of an electronic device such as a smart phone, technological development for miniaturization, thickness reduction, and weight reduction is underway. In addition, components integrated in a small space are being located for high performance of mobile electronic devices.

An electronic device includes components for dissipating heat generated by components included therein and blocking electromagnetic waves.

<CIT> discloses an electromagnetic wave shielding sheet including: a substrate that is formed in a nano-web form by spinning a polymer material into fiber strands by a spinning method; a conductive metal layer that is formed on one surface of the substrate for shielding electromagnetic waves; and an adhesive layer formed on the other surface of the substrate, to thereby make a thickness of the electromagnetic wave shielding sheet thin, and improve electromagnetic wave shielding performance. Other relevant prior art are: <CIT> and <CIT>.

Accordingly, an aspect of the disclosure is to provide an electronic components having a high power density are applied to electronic devices. The electronic components having the high power density may be disposed on a printed circuit board having a limited area, and may thus generate heat in the electronic devices. Due to the high heating temperature of the electronic devices, the performance of the electronic devices may be deteriorated, or the lifespan of individual components and the electronic devices may be shortened. In addition, the temperature of the external surfaces of the electronic devices increases due to the increased heating temperature, which may be uncomfortable to a user. In addition, the high-power electronic components may generate electromagnetic waves as well as heat. Electromagnetic waves generated from the electronic components may cause deterioration in performance and lifespan of peripheral components and malfunction of mobile electronic devices, and may have a harmful effect on the human body.

In order to dissipate the heat generated from components of an electronic device, a thermal interface material (TIM) is applied. In addition, in order to block electromagnetic waves generated from a component of an electronic device, a shield can is applied such that a metal frame and a metal cover thereof surround components. By applying the shield can to an electronic device, it is possible to block electromagnetic interference (EMI) generated from heat-generating components such as an application processor (AP), a power management IC (PMIC), and a pulse amplitude modulator (PAM). However, the shield can may trap therein the heat generated from a component together with electromagnetic waves. Thus, the temperature inside the component may increase, and thus the performance and/or lifespan of the component may be deteriorated. In addition, when the shield can is applied, the thickness of the electronic device may increase.

Another aspect of the disclosure is to provide a shielding sheet capable of blocking electromagnetic waves as well as dissipating the heat generated from components of an electronic device, and an electronic device including the shielding sheet.

In accordance with an aspect of the disclosure, a portable communication device is provided. The portable communication device includes a heat dissipation sheet according to independent claim <NUM>.

In accordance with independent claim <NUM>, a heat dissipation sheet is provided. The heat dissipation sheet includes a first nanofiber member having a first density, a second nanofiber member attached to the first nanofiber member and having a second density lower than the first density, a heat-transfer member positioned on or above the second nanofiber member, and a conductive material coated on at least a portion of the first nanofiber member and the second nanofiber member. At least some of the conductive material penetrates into the first nanofiber member or the second nanofiber member.

In accordance with another aspect of the disclosure, a shielding sheet is provide. A shielding sheet includes blocking electromagnetic waves as well as dissipating the heat generated from a component (e.g., an AP, a communication chip, or a memory) of an electronic device.

According to various embodiments, it is possible to reduce the thickness of an electronic device by applying the shielding sheet.

According to various embodiments, when manufacturing an electronic device, it is possible to reduce the number of manufacturing operations and the cost of manufacturing the electronic device.

In addition, various other effects may be provided that may be directly or indirectly understood through this document.

Throughout like reference numerals will be understood to refer to like parts, components, and structures.

According to an embodiment, non-volatile memory <NUM> may include internal memory <NUM> and external memory <NUM>.

The camera module <NUM> may capture an image or moving images.

<FIG> is a front perspective view illustrating a mobile electronic device according to an embodiment of the disclosure.

<FIG> is a rear perspective view illustrating an electronic device of <FIG> according to an embodiment of the disclosure.

Referring to <FIG>, the electronic device <NUM> may include a housing <NUM> including a first surface (or a front surface) 210A, a second surface (or a rear surface) 210B, and a side surface 210C surrounding the space between the first surface 210A and the second surface 210B. In another embodiment (not illustrated), the term "housing" may refer to a structure forming some of the first surface 210A, the second surface 210B, and the side surface 210C of <FIG>. According to an embodiment, at least a portion of the first surface 210A may be formed by a substantially transparent front plate <NUM> (e.g., a glass plate or a polymer plate including various coating layers). The second surface 210B may be formed by a substantially opaque rear plate <NUM>. The rear plate <NUM> may be made of, for example, coated or colored glass, ceramic, a polymer, a metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of two or more of these materials. The side surface 210C may be formed by a side bezel structure <NUM> (or a "side member") coupled to the front plate <NUM> and the rear plate <NUM> and including a metal and/or a polymer. In some embodiments, the rear plate <NUM> and the side bezel structure <NUM> may be integrally formed, and may include the same material (e.g., a metal material such as aluminum).

In the illustrated embodiment, the front plate <NUM> may include two first areas 210D, which are bent from the first surface 210A toward the rear plate <NUM> and extend seamlessly, at the long opposite side edges thereof. In the illustrated embodiment (see <FIG>), the rear plate <NUM> may include two second areas 210E, which are bent from the second surface 210B toward the front plate <NUM> and extend seamlessly, at the long opposite side edges thereof. In some embodiments, the front plate <NUM> (or the rear plate <NUM>) may include only one of the first areas 210D (or the second areas 210E). In some embodiments, some of the first areas 210D and the second areas 210E may not be included. In the above-described embodiments, when viewed from a side of the electronic device <NUM>, the side bezel structure <NUM> may have a first thickness (or width) on the side in which the first areas 210D or the second areas 210E are not included, and may have a second thickness, which is smaller than the first thickness, on the side in which the first areas 210D or the second areas 210E are included.

According to an embodiment, the electronic device <NUM> may include at least one of a display <NUM>, an input device <NUM>, a sound output device <NUM> or <NUM>, a sensor module <NUM> or <NUM>, a camera module <NUM>, <NUM>, or <NUM>, a key input device <NUM>, an indicator (not illustrated), or a connector <NUM> or <NUM>. In some embodiments, in the electronic device <NUM>, at least one of the components (e.g., the key input devices <NUM> or the indicator) may be omitted, or other components may be additionally included.

The display <NUM> may be visible through, for example, a considerable portion of the front plate <NUM>. In some embodiments, at least a part of the display <NUM> may be visible through the front plate <NUM> forming the first surface 210A and the first areas 210D of the side surfaces 210C. The display <NUM> may be coupled to or disposed adjacent to a touch-sensitive circuit, a pressure sensor capable of measuring touch intensity (pressure), and/or a digitizer configured to detect a magnetic-field-type stylus pen. In some embodiments, at least some of the sensor modules <NUM> and <NUM> and/or at least some of the key input devices <NUM> may be disposed in the first areas 210D and/or the second areas 210E.

In some embodiments (not illustrated), at least one of the audio module (e.g., sound output device <NUM>), the sensor module <NUM>, the camera module <NUM> (e.g., a front camera module), and the fingerprint sensor may be included in the rear surface of the screen display area of the display <NUM>. In some embodiments (not illustrated), the display <NUM> may be coupled to or disposed adjacent to a touch-sensitive circuit, a pressure sensor capable of measuring the intensity of a touch (pressure), and/or a digitizer that detects an electromagnetic-field-type stylus pen. In some embodiments, at least some of the sensor modules <NUM> and <NUM> and/or at least some of the key input devices <NUM> may be disposed in the first areas 210D and/or the second areas 210E.

The input device <NUM> may include a microphone. In some embodiments, the input device <NUM> may include a plurality of microphones arranged to sense the direction of sound. The sound output devices <NUM> and <NUM> may include speakers (e.g., sound output devices <NUM> and <NUM>). The speakers (e.g., sound output devices <NUM> and <NUM>) may include an external speaker (e.g., sound output device <NUM>) and a phone call receiver (e.g., sound output device <NUM>). According to some embodiments, the input device <NUM> (e.g., a microphone), the speakers (e.g., sound output devices <NUM> and <NUM>), and the connectors <NUM> and <NUM> are disposed in the space in the electronic device <NUM>, and may be exposed to the external environment through one or more holes formed in the housing <NUM>. According to some embodiments, the holes formed in the housing <NUM> may be commonly used for the input device <NUM> (e.g., a microphone) and the speakers (e.g., sound output devices <NUM> and <NUM>). According to some embodiments, the sound output devices <NUM> and <NUM> may include a speaker that operates without a separate speaker hole formed in the housing <NUM> (e.g., a piezo speaker).

The sensor modules <NUM> and <NUM> may generate electrical signals or data values corresponding to the internal operating state or the external environmental state of the electronic device <NUM>. The sensor modules <NUM> and <NUM> may include, for example, a first sensor module <NUM> (e.g., a proximity sensor) and/or a second sensor module (not illustrated) (e.g., a fingerprint sensor) disposed on the first surface 210A of the housing <NUM>, and/or a third sensor module <NUM> (e.g., an HRM sensor) disposed on the second surface 210B of the housing <NUM>. The fingerprint sensor may be disposed not only on the first surface 210A (e.g., the display <NUM>) of the housing <NUM>, but also on the second surface 210B. The electronic device <NUM> may further include at least one of sensor modules (not illustrated) such as a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

The camera modules <NUM>, <NUM>, and <NUM> may include a first camera device <NUM> disposed on the first surface 210A of the electronic device <NUM>, a second camera device <NUM> disposed on the second surface 210B thereof, and/or a flash (e.g., camera module <NUM>). The camera devices <NUM> and <NUM> may include one or more lenses, an image sensor, and/or an image signal processor. The flash (e.g., camera module <NUM>) may include, for example, a light-emitting diode or a xenon lamp. The first camera device <NUM> may be disposed under the display panel in the form of an under-display camera (UDC). In some embodiments, two or more lenses (e.g., a wide-angle lens and a telephoto lens) and image sensors may be disposed on one surface of the electronic device <NUM>. In some embodiments, a plurality of first camera devices <NUM> may be disposed on the first surface of the electronic device <NUM> (e.g., the surface on which a screen is displayed) in the form of an under-display camera (UDC).

The key input devices <NUM> may be disposed on the side surface 210C of the housing <NUM>. In another embodiment, the electronic device <NUM> may not include some or all of the above-mentioned key input devices <NUM>, and a key input device <NUM>, which is not included in the electronic device <NUM>, may be implemented in another form, such as a soft key, on the display <NUM>. In some embodiments, a key input device <NUM> may be implemented using a pressure sensor included in the display <NUM>.

The indicator may be disposed, for example, on the first surface 210A of the housing <NUM>. The indicator may provide, for example, the status information of the electronic device <NUM> in an optical form. In another embodiment, the indicator may provide a light source that is interlocked with, for example, the operation of the camera module <NUM>. The indicator may include, for example, an LED, an IR LED, and a xenon lamp.

The connectors <NUM> and <NUM> may include a first connector hole (e.g., connector <NUM>), which is capable of accommodating a connector (e.g., a USB connector) for transmitting/receiving power and/or data to/from an external electronic device, and/or a second connector hole (e.g., connector <NUM>), which is capable of accommodating a connector (e.g., an earphone jack) for transmitting/receiving an audio signal to/from an external electronic device.

Some of the camera modules <NUM> and <NUM> (e.g., the camera module <NUM>), some of the sensor modules <NUM> and <NUM> (e.g., the sensor module <NUM>), or the indicator may be disposed to be visible through the display <NUM>. The camera module <NUM> may be disposed to overlap the display area, and a screen may also be displayed on the display area corresponding to the camera module <NUM>. Some sensor modules <NUM> may be disposed in the internal space in the electronic device so as to perform the functions thereof without being visually exposed through the front plate <NUM>.

<FIG> is an exploded perspective view illustrating an electronic device according to an embodiment of the disclosure.

Referring to <FIG>, the electronic device <NUM> (e.g., the electronic device <NUM> in <FIG> or the electronic device <NUM> in <FIG>) may include a side structure <NUM> (e.g., a side bezel structure), a first support member <NUM> (e.g., a bracket or a support structure), a front plate <NUM> (e.g., a front cover), a display <NUM>, a printed circuit board (PCB) <NUM>, a battery <NUM>, a second support member <NUM> (e.g., a rear case), an antenna <NUM>, a rear plate <NUM> (e.g., a rear cover), and/or a heat dissipation structure <NUM>. The heat dissipation structure <NUM> may include a shielding sheet (e.g., the shielding sheet <NUM> in <FIG>) for dissipating the heat generated from a heat-generating component <NUM>.

In some embodiments, in the electronic device <NUM>, at least one of the components (e.g., the first support member <NUM> or the second support member <NUM>) may be omitted, or other components may be additionally included. At least one of the components of the electronic device <NUM> may be the same as or similar to at least one of the components of the electronic device <NUM> of <FIG> or the electronic device <NUM> of <FIG>, and a redundant description will be omitted below.

The first support member <NUM> may be disposed inside the electronic device <NUM>, and may be connected to the side structure <NUM>, or may be formed integrally with the side structure <NUM>. The first support member <NUM> may be formed of, for example, a metal material and/or a non-metal (e.g., polymer) material. The display <NUM> may be coupled to one side of the first support member <NUM>, and the printed circuit board <NUM> may be coupled to the other side of the first support member <NUM>. On the printed circuit board <NUM>, one or more heat-generating components <NUM>, a plurality of peripheral circuit components <NUM>, and an interface may be mounted. The plurality of peripheral circuit components <NUM> may be located on the front surface and/or the rear surface of the printed circuit board <NUM>.

The interface may include, for example, a high-definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, and/or an audio interface. The interface may electrically or physically connect, for example, the electronic device <NUM> to an external electronic device, and may include a USB connector, an SD card/MMC connector, or an audio connector.

The battery <NUM> is a device for supplying power to at least one component of the electronic device <NUM>, and may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. At least a portion of the battery <NUM> may be disposed to be substantially flush with, for example, the printed circuit board <NUM>. The battery <NUM> may be integrally disposed inside the electronic device <NUM>. In another embodiment, the battery <NUM> may be disposed to be detachable from/attachable to the electronic device <NUM>.

The antenna <NUM> may include, for example, a nearfield communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. The antenna <NUM> may perform short-range communication with, for example, an external electronic device, or may transmit/receive power required for charging to/from the external device in a wireless manner. In another embodiment, an antenna structure may be formed by a portion of the side bezel structure <NUM>, a portion of the first support member <NUM>, or a combination thereof.

According to various embodiments, the first support member <NUM> of the side member <NUM> may include a first surface <NUM> facing the front plate <NUM> and a second surface <NUM> facing away from the first surface <NUM> (e.g., facing the rear plate). According to some embodiments, a camera module <NUM> (e.g., the camera module <NUM> in <FIG>) may be disposed between the first support member <NUM> and the rear plate <NUM>. According to some embodiments, the camera module <NUM> may protrude to the front plate <NUM> through a through hole <NUM> extending from the first surface <NUM> to the second surface <NUM> of the first support member <NUM>, or may be visible through the front surface (e.g., front plate <NUM>). According to some embodiments, the portion protruding through the through hole <NUM> in the camera module <NUM> may be disposed to detect the external environment at the corresponding position of the display <NUM>. As another example, when the camera module <NUM> is disposed between the display <NUM> and the first support member <NUM>, the through hole <NUM> may be unnecessary.

<FIG> is a view illustrating that a shielding sheet according to various embodiments is disposed on a printed circuit board according to an embodiment of the disclosure.

<FIG> is a cross-sectional view of a portion of an electronic device taken along line I-I' in <FIG> according to an embodiment of the disclosure.

<FIG> is a cross-sectional view illustrating an embodiment of a heat dissipation structure.

Referring to <FIG>, a heat-generating component <NUM>, a peripheral circuit component <NUM>, and a shielding sheet <NUM> may be disposed on the printed circuit board <NUM> according to an embodiment. A battery <NUM> may be disposed in the vicinity of the printed circuit board <NUM>. The heat-generating component <NUM> may be positioned on a first surface <NUM>-<NUM> of the printed circuit board <NUM>. A plurality of peripheral circuit components <NUM> may be positioned on a first surface <NUM>-<NUM> and a second surface <NUM>-<NUM> of the printed circuit board <NUM>. <FIG> illustrates an example in which the shielding sheet <NUM> is disposed to correspond to one electronic component (e.g., heat-generating component <NUM>). However, the disclosure is not limited thereto, and the shielding sheet <NUM> may be disposed to correspond to a plurality of heat-generating components <NUM>, as illustrated in <FIG>.

Referring to <FIG>, according to an embodiment, the heat-generating components <NUM> may include a communication module (e.g., the communication module <NUM> in <FIG>), a processor (e.g., the processor <NUM> in <FIG>), a controller, a power management integrated circuit (PMIC) (e.g., the power management module <NUM> in <FIG>), and/or a memory (e.g., the memory <NUM> in <FIG>). In an embodiment, when there are multiple heat-generating components <NUM>, the heat-generating components <NUM> may be disposed side by side on the printed circuit board <NUM>.

In an embodiment, the processor may include at least one of an application processor (AP), a central processing unit (CPU), a graphics processing device (e.g., a mobile graphics processing unit (GPU), a CP (central processor), an image signal processor, a communication processor, and a sensor hub processor.

In an embodiment, the memory may be high-bandwidth memory (HBM), dynamic random access memory (DRAM), static random access memory (SRAM), phase-change random access memory (PRAM), magnetic random access memory (MRAM), resistive random access memory (RRAM), flash memory, or electrically erasable programmable read-only memory (EEPROM).

In an embodiment, the electronic device (e.g., the electronic device <NUM> in <FIG>) may include a shielding member <NUM>, a shielding sheet <NUM>, and/or a metal frame. For example, the metal frame <NUM> may be included in the first support member <NUM> of <FIG>. As another example, the metal frame <NUM> may be included in the second support member <NUM> of <FIG>.

According to an embodiment, at least one heat-generating component <NUM> may be positioned on the first surface <NUM>-<NUM> of the printed circuit board <NUM>. The shielding member <NUM> may be disposed to surround the side surface of the heat-generating component <NUM>. In an embodiment, the shielding member <NUM> may be a shield can. The shielding member <NUM> may have a heat dissipation function as well as an electromagnetic interference (EMI) function.

As an embodiment, when a shield can is applied as the shielding member <NUM>, the shield can may be formed of a metal material having high thermal conductivity.

As an embodiment, the shielding member <NUM> (e.g., a shield can) may contain a material having high conductivity, such as SUS, copper (Cu), nickel (Ni), silver (Ag), gold (Au), or aluminum (Al). In some embodiments, the shielding member <NUM> may be made of a composite material containing a thermally conductive filler or a polymer. The thermally conductive filler may include at least one of, for example, a metal filler, a ceramic filler, or a carbon filler. The metal filler may include, for example, at least one of copper (Cu), nickel (Ni), silver (Ag), gold (Au), or aluminum (Al). The ceramic filler may include, for example, at least one of aluminum nitride (AlN), alumina (Al<NUM>O<NUM>), boron nitride (BN), beryllium oxide (BeO), or silicon carbide (SiC). The carbon filler may include, for example, at least one of graphite, carbon nanotubes, carbon fibers, or graphene.

According to an embodiment, a shielding sheet <NUM> may be disposed on the heat-generating component <NUM> and the shielding member <NUM>. In an embodiment, the shielding sheet <NUM> may be disposed on the heat-generating component <NUM> and the shielding member <NUM> in the Z-axis direction. For example, the bottom surface of the shielding sheet <NUM> may be disposed so as to be in contact with the top surfaces of a plurality of heat-generating components <NUM>. As another example, the bottom surface of the shielding sheet <NUM> may be disposed to be in contact with the shielding member <NUM>.

According to an embodiment, the shielding sheet <NUM> is provided with an adhesive layer (e.g., the adhesive layer <NUM> in <FIG>) having adhesive force so that the shielding sheet <NUM> can be attached to the heat-generating component <NUM>. As another example, the shielding sheet <NUM> may be attached to the shielding member <NUM>. The heat-generating component <NUM> may be shielded from the outside by the shielding member <NUM> and the shielding sheet <NUM>. According to an embodiment, the shielding sheet <NUM> and the heat-generating component <NUM> or the shielding member <NUM> may be bonded using an adhesive member (e.g., a double-sided tape).

According to an embodiment, a metal frame <NUM> may be disposed on the shielding sheet <NUM>. For example, the bottom surface of the metal frame <NUM> may be disposed to be in contact with the top surface of the shielding sheet <NUM>. The metal frame <NUM> is capable of supporting the shielding sheet <NUM> and dissipating heat to be transferred from the shielding sheet <NUM>. As an embodiment, the metal frame <NUM> may contain a material having a predetermined level of rigidity and thermal conductivity, such as SUS, copper (Cu), nickel (Ni), silver (Ag), gold (Au), or aluminum (Al). In an embodiment, the metal frame <NUM> may be included in the first support member <NUM> or the second support member <NUM>.

<FIG> is a view illustrating a cross section of a shielding sheet according to an embodiment of the disclosure.

Referring to <FIG> and <FIG>, the shielding sheet <NUM> may include a first nanofiber member <NUM> (e.g., a high-density nanosheet), a second nanofiber member <NUM> (e.g., a low-density nanosheet), and/or a heat-transfer member layer <NUM>.

According to an embodiment, the first nanofiber member <NUM> may be formed of polyethylene terephthalate (PET) fibers having a first diameter (e.g., a diameter in the range of about <NUM> to about <NUM>). The first nanofiber member <NUM> may have a first density.

According to an embodiment, the second nanofiber member <NUM> may be disposed on the first nanofiber member <NUM>. The second nanofiber member <NUM> may be formed of PET fibers having a second diameter (e.g., a diameter in the range of about <NUM> to about <NUM>). The second nanofiber member <NUM> may have a second density lower than the first density.

According to an embodiment, the heat-transfer member layer <NUM> may be disposed on the second nanofiber member <NUM>.

According to an embodiment, the first nanofiber member <NUM> and the second nanofiber member <NUM> may be coated with a conductive material (not illustrated). For example, the first nanofiber member <NUM> and the second nanofiber member <NUM> may be plated with a metal material. For example, the metal material may include Ni-Cu-Ni. As another example, the conductive material may permeate into the first nanofiber member or the second nanofiber member to be formed in a mesh shape. As another example, the metal material may be plated to a thickness between about <NUM> and about <NUM>. The first nanofiber member <NUM> or the second nanofiber member <NUM> may function as a shielding layer for blocking electromagnetic waves. The first nanofiber member <NUM> or the second nanofiber member <NUM> may function as a heat dissipation layer that dissipates the heat generated from the heat-generating components <NUM>.

In an embodiment, when assembling the electronic device (e.g., the electronic device <NUM> in <FIG>), the thickness of the shielding sheet <NUM> may be reduced through compression. Hereinafter, the thickness of the shielding sheet <NUM> not compressed before assembling the electronic device will be described.

According to an embodiment, the thickness T1 of the first nanofiber member <NUM> may be about <NUM> to about <NUM>. The thickness T2 of the second nanofiber member <NUM> may be about <NUM> to about <NUM>. The thickness T3 of the heat-transfer member layer <NUM> may be about <NUM> to about <NUM>.

Referring to <FIG> and <FIG>, the shielding sheet <NUM> may include a first nanofiber member <NUM> (e.g., a high-density nanosheet), a second nanofiber member <NUM> (e.g., a low-density nanosheet), a bonding layer <NUM>, an adhesive layer <NUM>, and/or a heat-transfer member layer <NUM>.

According to an embodiment, the adhesive layer <NUM> may be disposed under the first nanofiber member <NUM>. As an embodiment, the adhesive layer <NUM> may include an adhesive material (e.g., a pressure-sensitive adhesive (PSA)). As another embodiment, the adhesive layer <NUM> may be a piece of double-sided tape.

According to an embodiment, the first nanofiber member <NUM> and the second nanofiber member <NUM> may be bonded to each other. For example, the first nanofiber member <NUM> and the second nanofiber member <NUM> may be bonded to each other using a low-temperature melting method. In an embodiment, when bonding the first nanofiber member <NUM> and the second nanofiber member <NUM> to each other, the bonding layer <NUM> may be formed between (or at the boundary of) the first nanofiber member <NUM> and the second nanofiber member <NUM>.

According to an embodiment, a heat-transfer member layer <NUM> may be disposed on the second nanofiber member <NUM>. The heat-transfer member layer <NUM> may include a heat-transfer material <NUM>. In an embodiment, when the heat-transfer member layer <NUM> is disposed, at least a portion of the heat-transfer material <NUM> (e.g., a thermal interface material (TIM) or a phase-change material (PCM)) may be introduced into the second nanofiber member <NUM>. For example, when a plurality of kinds of heat dissipation filler is included in the heat-transfer material <NUM>, the plurality of kinds of heat dissipation filler may be disposed inside the second nanofiber member <NUM>. In an embodiment, the heat-transfer material <NUM> may be introduced in a direction from the top surface to the bottom surface of the second nanofiber member <NUM>. For example, the heat-transfer material <NUM> may be formed to have a vertically long column shape when viewed in cross section. As another example, some of the heat-transfer material <NUM> may be introduced up to the bonding layer <NUM>. As another example, some of the heat-transfer material <NUM> may come into contact with the first nanofiber member <NUM>. As an example, the heat-transfer material <NUM> may include silicon resin and/or aluminum nitride (AlN). As an example, the heat-transfer material <NUM> may include silicon resin and/or aluminum oxide (Al<NUM>O<NUM>).

According to various embodiments, the shielding sheet <NUM> may be formed to have a thickness in the range of about <NUM> to about <NUM>. In an embodiment, when assembling the electronic device (e.g., the electronic device <NUM> in <FIG>), the thickness of the shielding sheet <NUM> may be reduced to a thickness in the range of about <NUM> to about <NUM> through compression. Hereinafter, the thickness of a shielding sheet <NUM> that is in the state of not being compressed prior to assembly of the electronic device will be described.

According to an embodiment, the thickness T1 of the first nanofiber member <NUM> may be about <NUM> to about <NUM>. The thickness T2 of the second nanofiber member <NUM> may be about <NUM> to about <NUM>. The thickness T3 of the heat-transfer member layer <NUM> may be about <NUM> to about <NUM>. The thickness T4 of the adhesive layer <NUM> may be about <NUM> to about <NUM>. The thickness T5 of the bonding layer <NUM> formed between the first nanofiber member <NUM> and the second nanofiber member <NUM> may be about <NUM> to about <NUM>.

In various embodiments, the shielding sheet <NUM> is formed to have a thickness in the range of about <NUM> to about <NUM> before compression, and a thickness in the range of about <NUM> to about <NUM> after compression, and may be made of a fiber material so as to have a flexible property. In an embodiment, even if the heat-generating components <NUM> have different thicknesses, the shielding sheet <NUM> may be flexibly bent and may be disposed to be in contact with the top surfaces of the heat-generating components <NUM>. For example, since the shielding sheet <NUM> is flexibly bent, it is possible to prevent the occurrence of a gap between the shielding sheet <NUM> and the heat-generating components <NUM> due the different thicknesses or to prevent the shielding sheet <NUM> from being lifted from the heat-generating components <NUM>.

In various embodiments, the shielding sheet <NUM> may exhibit a thermal conductivity of about <NUM> W/mK to about <NUM> W/mK and electromagnetic-wave-shielding performance of about <NUM> dB to about <NUM> dB. The heat generated from the heat-generating components <NUM> of the electronic device is transferred to the shielding sheet <NUM> and is dissipated, and electromagnetic waves generated from the heat-generating components <NUM> may be blocked by the shielding sheet <NUM>.

According to an embodiment, by applying the shielding sheet <NUM> having a thickness of about <NUM> to about <NUM> before compression and about <NUM> to about <NUM> after compression, it is possible to reduce the thickness of the electronic device. In addition, since a single shielding sheet <NUM> can replace a general metal cover, a shielding film, and a liquid TIM, it is possible to reduce the number of manufacturing operations and the cost of manufacturing the heat dissipation structure <NUM>.

<FIG> is a view illustrating a method of manufacturing a shielding sheet according to various embodiments of the disclosure.

Referring to <FIG>, the second nanofiber member <NUM> may be positioned on the first nanofiber member <NUM>.

According to an embodiment, while the interface between the first nanofiber member <NUM> and the second nanofiber member <NUM> is melted through a low-temperature melting method, the first nanofiber member <NUM> and the second nanofiber member <NUM> may be physically bonded so as to form a bonding layer <NUM>. Through this, the first nanofiber member <NUM> and the second nanofiber member <NUM> may be attached to each other. A laminated fabric may be formed by attaching the first nanofiber member <NUM> and the second nanofiber member <NUM> to each other.

According to an embodiment, a coating (e.g., through an electroless plating (securing electrical conductivity and thermal conductivity) or immersion-plating method) may be applied to the laminated fabric. For example, the first nanofiber member <NUM> and the second nanofiber member <NUM> may have different forms, in which a conductive material is coated (plated) depending on the densities thereof. In the case of the first nanofiber member <NUM> (e.g., a high-density fabric), the plating metal hardly permeates into the fabric in the vertical direction, and thus plating may be performed in a horizontal direction. In the case of the second nanofiber member <NUM> (e.g., a low-density fabric), the plating metal may easily permeate into the fabric, and thus plating may be performed in a vertical direction. As described above, due to the characteristics of being plated in the vertical and horizontal directions, the laminated fabric is capable of blocking electromagnetic waves emitted in the X-axis, Y-axis, and Z-axis directions at substantially the same level as a metal cover. Through this, the shielding sheet <NUM> may ensure electromagnetic-wave-shielding performance in the X-axis, Y-axis, and Z-axis directions.

For example, the first nanofiber member <NUM> and the second nanofiber member <NUM> having different densities can be plated in a single plating operation. As the plating material, for example, a Ni-Cu-Ni plating material may be used. For example, a plating layer having a thickness of about <NUM> may be formed on the laminated fabric. Thereafter, the plated laminated fabric <NUM> may be formed through firing at a predetermined temperature.

According to an embodiment, a heat-transfer material (e.g., a thermal interface material (TIM) or a phase-change material (PCM)) may be disposed on the plated laminated fabric <NUM>. For example, the plated laminate fabric <NUM> may be filled with the heat-transfer material <NUM>. As an example, as the heat-transfer material <NUM>, one of aluminum nitride (AlN), aluminum oxide (Al<NUM>O<NUM>), or silicon resin, or a material in which a plurality of materials is mixed, may be used. When the heat-transfer material <NUM> (e.g., a thermal interface material (TIM) or a phase-change material (PCM)) is disposed, the heat-transfer member layer <NUM> may be formed on the second nanofiber member <NUM> included in the plated laminated fabric <NUM>. In an embodiment, at least some of the heat-transfer material <NUM> may permeate into and fill the inside of the second nanofiber member <NUM>.

According to an embodiment, the heat-transfer member layer <NUM> may be formed by spraying the heat-transfer material <NUM> (e.g., a thermal interface material (TIM) or a phase-change material (PCM)) onto the laminated fabric through an inkjet method or an aerosol method. At least some of the heat-transfer material <NUM> may permeate into the second nanofiber member <NUM>.

When a plurality of kinds of heat dissipation filler is included in the heat-transfer material <NUM>, the plurality of kinds of heat dissipation filler may be disposed inside the second nanofiber member <NUM>.

According to an embodiment, the adhesive layer <NUM> may be formed of acrylic and aluminum hydroxide (Al<NUM>O<NUM>). For example, the adhesive layer <NUM> may be formed under the first nanofiber member <NUM>. However, without being limited thereto, the adhesive layer <NUM> may be formed by attaching a piece of double-sided tape to the lower portion of the first nanofiber member <NUM> or by disposing an adhesive material (e.g., a pressure-sensitive adhesive (PSA)). The shielding sheet <NUM> may be manufactured through this operation.

<FIG> is a cross-sectional view illustrating a portion of an electronic device in which a shielding sheet is disposed according to an embodiment of the disclosure. Referring to <FIG>, a detailed description of the same configurations as those of <FIG> may be omitted.

Referring to <FIG> and <FIG>, a heat-generating component <NUM>, a peripheral circuit component <NUM>, and/or a shielding sheet <NUM> may be disposed on a printed circuit board <NUM> according to an embodiment.

In an embodiment, the heat-generating components <NUM> may include a communication module (e.g., the communication module <NUM> in <FIG>), a processor (e.g., the processor <NUM> in <FIG>), a controller, a power management integrated circuit (PMIC) (e.g., the power management module <NUM> in <FIG>), and/or a memory (e.g., the memory <NUM> in <FIG>). As an embodiment, when there are a plurality of heat-generating components <NUM>, the heat-generating components <NUM> may be disposed side by side on the printed circuit board <NUM>.

According to an embodiment, an electronic device (e.g., the electronic device <NUM> in <FIG>) may include a shielding member <NUM>, a heat transfer member <NUM> (e.g., a thermal interface material (TIM) or a phase-change material (PCM)), a shielding sheet <NUM>, and/or a metal frame <NUM>.

According to an embodiment, the heat-generating component <NUM> may be disposed on a first surface of the printed circuit board <NUM>, and the shielding member <NUM> may be disposed to surround the side surfaces of a plurality of heat-generating components <NUM>. As an embodiment, the shielding member <NUM> may be a shield can. The shielding member <NUM> may have a heat dissipation function as well as an electromagnetic interference (EMI) function. As an embodiment, when a shield can is applied as the shielding member <NUM>, the shield can may be formed of a metal material having high thermal conductivity.

According to an embodiment, a heat transfer member <NUM> may be disposed on the heat-generating component <NUM> (e.g., as part of heat dissipation structure <NUM>-<NUM>). In an embodiment, the heat transfer member <NUM> may be formed of a solid material or a liquid material. In an embodiment, the heat transfer member <NUM> may be disposed between a plurality of heat-generating components <NUM> and the shielding sheet <NUM> to enhance thermal coupling. As an example, the heat transfer member <NUM> may include at least one of a thermal grease, a thermally conductive reactive compound, a thermally conductive elastomer, or a thermally conductive adhesive tape. The heat generated from the heat-generating components <NUM> is transferred to the shielding sheet <NUM> through the heat transfer member <NUM> so that the heat from the heat-generating component <NUM> can be dissipated.

According to an embodiment, the shielding sheet <NUM> may be disposed on the heat transfer member <NUM> and/or the shielding member <NUM>. For example, the bottom surface of the shielding sheet <NUM> may be disposed so as to be in contact with the top surface of the heat transfer member <NUM>. As another example, the bottom surface of the shielding sheet <NUM> may be disposed so as to be in contact with the shielding member <NUM> (e.g., a shield can).

According to an embodiment, the shielding sheet <NUM> is provided with an adhesive layer (e.g., the adhesive layer <NUM> in <FIG>) having adhesive force so that the shielding sheet <NUM> can be attached to the top surface of the heat transfer member <NUM>. According to another example, the shielding sheet <NUM> is provided with an adhesive layer (e.g., the adhesive layer <NUM> in <FIG>) having adhesive force so that the shielding sheet <NUM> can be attached to the top surface of the shielding member <NUM>. The heat-generating component <NUM> may be shielded from the outside by the shielding member <NUM> and the shielding sheet <NUM>.

<FIG> is a cross-sectional view illustrating a heat dissipation structure taken along line II-II' in <FIG> according to an embodiment of the disclosure.

Referring to <FIG> and <FIG>, a heat-generating component <NUM>, a peripheral circuit component <NUM>, and/or a shielding sheet <NUM> may be disposed on a printed circuit board <NUM> according to an embodiment (e.g., in heat dissipation structure <NUM>-<NUM>).

According to an embodiment, the heat-generating components <NUM> may include a communication module (e.g., the communication module <NUM> in <FIG>), a processor (e.g., the processor <NUM> in <FIG>), a controller, a power management integrated circuit (PMIC) (e.g., the power management module <NUM> in <FIG>), and/or a memory (e.g., the memory <NUM> in <FIG>). As an embodiment, when there are multiple heat-generating components <NUM>, the heat-generating components <NUM> may be disposed side by side on the printed circuit board <NUM>.

According to an embodiment, an electronic device (e.g., the electronic device <NUM> in <FIG>) may include a shielding member <NUM>, a heat transfer member <NUM> (e.g., a thermal interface material (TIM) or a phase-change material (PCM)), a shielding sheet <NUM>, a thermal spreader <NUM>, and/or a metal frame <NUM>.

According to an embodiment, the heat-generating component <NUM> may be disposed on a first surface of the printed circuit board <NUM>, and the shielding member <NUM> may be disposed to surround the side surface of the heat-generating component <NUM>. As an embodiment, the shielding member <NUM> may be a shield can. The shielding member <NUM> may have a heat dissipation function as well as an electromagnetic interference (EMI) function. As an embodiment, when a shield can is applied as the shielding member <NUM>, the shield can may be formed of a metal material having high thermal conductivity.

According to an embodiment, a heat transfer member <NUM> may be disposed on the heat-generating component <NUM>. For example, the heat transfer member <NUM> may be in contact with the top surface of the heat-generating component <NUM> and the bottom surface of the shielding sheet <NUM>. In an embodiment, the heat transfer member <NUM> may be formed of a solid material or a liquid material, and the thermal coupling between the heat-generating component <NUM> and the shielding sheet <NUM> can be strengthened. As an embodiment, the heat transfer member <NUM> may include at least one of a thermal grease, a thermally conductive reactive compound, a thermally conductive elastomer, or a thermally conductive adhesive tape. The heat generated from the heat-generating components <NUM> is transferred to the shielding sheet <NUM> through the heat transfer member <NUM> so that heat from the heat-generating components <NUM> can be dissipated.

According to an embodiment, the shielding sheet <NUM> may be disposed on the heat transfer member <NUM> and the shielding member <NUM>. For example, the bottom surface of the shielding sheet <NUM> may be disposed so as to be in contact with the top surface of the heat transfer member <NUM>. As another example, the bottom surface of the shielding sheet <NUM> may be disposed to be in contact with the shielding member <NUM> (e.g., a shield can). In an embodiment, the lower portion of the shielding sheet <NUM> is provided with an adhesive layer (e.g., the adhesive layer <NUM> in <FIG>) having adhesive force so that the shielding sheet <NUM> can be attached to the top surface of the heat transfer member <NUM>. As another example, the shielding sheet <NUM> may be attached to the top surface of the shielding member <NUM>. The heat-generating component <NUM> may be shielded from the outside by the shielding member <NUM> and the shielding sheet <NUM>.

According to an embodiment, a thermal spreader <NUM> may be disposed on the shielding sheet <NUM>. For example, the bottom surface of the thermal spreader <NUM> may be in contact with the top surface of the shielding sheet <NUM>, and the top surface of the thermal spreader <NUM> may be in contact with the metal frame <NUM>. In an embodiment, the thermal spreader <NUM> may include a metal having excellent thermal conductivity, such as copper (Cu) or aluminum (Al). As an embodiment, the thermal spreader <NUM> may include a metal water-cooling device (e.g., a heat pipe or a vapor chamber). The thermal spreader <NUM> is capable of absorbing heat transferred from the shielding sheet <NUM> and dispersing and dissipating heat to the surroundings.

In an embodiment, a metal frame <NUM> may be disposed on the thermal spreader <NUM>. The metal frame <NUM> may be disposed to be in contact with the top surface of the thermal spreader <NUM>. The metal frame <NUM> is capable of supporting the thermal spreader <NUM> and dissipating heat transferred from the thermal spreader <NUM>.

When manufacturing an electronic device (e.g., the electronic device <NUM> in <FIG>) according to various embodiments, it is possible to implement an electromagnetic-wave-shielding function and a heat dissipation function through a single operation of disposing the shielding sheet <NUM> on the heat-generating component <NUM>, and thus it is possible to reduce the manufacturing time and manufacturing cost of the electronic device.

<FIG> is a view illustrating shielding performance of a shielding sheet according to an embodiment of the disclosure.

Referring to <FIG> and <FIG>, the electromagnetic-wave-shielding performance of the shielding sheet <NUM> for each frequency can be confirmed through a test.

When the shielding sheet <NUM> according to various embodiments is applied to an electronic device, it can be seen that the shielding sheet <NUM> has a shielding power of <NUM> dB in the X-axis direction (e.g., the horizontal direction) for electromagnetic waves of <NUM>. It can be seen that the shielding sheet <NUM> has a shielding power of <NUM>. 2dB in the Y-axis direction (e.g., the vertical direction) for electromagnetic waves of <NUM>.

When the shielding sheet <NUM> according to various embodiments is applied to an electronic device, it can be seen that the shielding sheet <NUM> has a shielding power of <NUM> dB in the X-axis direction (e.g., the horizontal direction) for electromagnetic waves of <NUM>. It can be seen that the shielding sheet <NUM> has a shielding power of <NUM>. 1dB in the Y-axis direction (e.g., the vertical direction) for electromagnetic waves of <NUM>.

When the shielding sheet <NUM> according to various embodiments is applied to an electronic device, it can be seen that the shielding sheet <NUM> has a shielding power of <NUM> dB in the X-axis direction (e.g., the horizontal direction) for electromagnetic waves of <NUM>. It can be seen that the shielding sheet <NUM> has a shielding power of <NUM> dB in the Y-axis direction (e.g., the vertical direction) for electromagnetic waves of <NUM>.

When the shielding sheet <NUM> according to various embodiments is applied to an electronic device, it can be seen that the shielding sheet <NUM> has an average shielding power of <NUM> dB in the X-axis direction (e.g., the horizontal direction) for electromagnetic waves of <NUM> to <NUM>.

A portable communication device (e.g., the electronic device <NUM> in <FIG>) according to various embodiments may include a first nanofiber member <NUM> having a first density, a second nanofiber member <NUM> attached to the first nanofiber member <NUM> and having a second density lower than the first density, a heat transfer member positioned on or above the second nanofiber member <NUM>, and a conductive material coated on at least a portion of the first nanofiber member and the second nanofiber member. At least some of the conductive material penetrates into the first nanofiber member <NUM> or the second nanofiber member <NUM>.

At least some of the material of the heat transfer member penetrates into the second nanofiber member <NUM>.

The portable communication device according to various embodiments may further include an electronic component (e.g., the heat-generating component <NUM> in <FIG>), positioned under the first nanofiber member <NUM>, and an adhesive layer <NUM> positioned between the first nanofiber member <NUM> and the electronic component (e.g., the heat-generating component <NUM> in <FIG>). At least some of the material of the adhesive layer <NUM> may penetrate into the first nanofiber member <NUM>.

The heat transfer member positioned on or above the second nanofiber member <NUM> forms a heat-transfer member layer <NUM>.

The first nanofiber member <NUM> may be formed of polyethylene terephthalate (PET) fibers having a diameter of <NUM> to <NUM>.

The second nanofiber member <NUM> may be formed of PET fibers having a diameter of <NUM> to <NUM>.

The portable communication device according to various embodiments may further include a bonding layer <NUM>, which is formed when the first nanofiber member <NUM> and the second nanofiber member <NUM> are bonded to each other through a low-temperature melting method. The conductive material may penetrate into the first nanofiber member <NUM> or the second nanofiber member <NUM> so as to form a mesh shape.

The portable communication device according to various embodiments may further include a thermal spreader <NUM> positioned on the heat dissipation sheet (e.g., shielding sheet <NUM>). The thermal spreader <NUM> may be a heat pipe or a vapor chamber.

A heat dissipation sheet (e.g., shielding sheet <NUM>) according to the invention includes a first nanofiber member <NUM> having a first density, a second nanofiber member <NUM> attached to the first nanofiber member <NUM> and having a second density lower than the first density, a heat transfer member positioned on or above the second nanofiber member <NUM>, and a conductive material coated on at least a portion of the first nanofiber member <NUM> and the second nanofiber member <NUM>. At least some of the conductive material penetrates into the first nanofiber member <NUM> or the second nanofiber member <NUM>.

The heat dissipation sheet (e.g., shielding sheet <NUM>) according to various embodiments may further include a bonding layer <NUM>, which is formed when the first nanofiber member <NUM> and the second nanofiber member <NUM> are bonded to each other through a low-temperature melting method.

The heat transfer member positioned on or above the second nanofiber member <NUM> may form a heat-transfer member layer <NUM>.

At least some of the material of the heat transfer member fills the second nanofiber member <NUM>.

The heat-transfer member layer <NUM> may have a thickness of <NUM> to <NUM>.

The heat dissipation sheet (e.g., shielding sheet <NUM>) according to various embodiments may further include an adhesive layer <NUM> positioned under the first nanofiber member <NUM>. The adhesive layer <NUM> may be attached to the top surface of a heat-generating component (e.g., the heat-generating component <NUM>).

The adhesive layer <NUM> has a thickness of <NUM> to <NUM>.

The conductive material may penetrate into the first nanofiber member <NUM> or the second nanofiber member <NUM> so as to form a mesh shape.

The first nanofiber member <NUM> may have a thickness of <NUM> to <NUM>.

The second nanofiber member <NUM> may have a thickness of <NUM> to <NUM>.

The heat dissipation sheet (e.g., shielding sheet <NUM>) according to various embodiments may have a thickness of about <NUM> to <NUM> before compression and a thickness of about <NUM> to <NUM> after compression.

Various embodiments as set forth herein may be implemented as software (e.g., the program #<NUM>) including one or more instructions that are stored in a storage medium (e.g., internal memory #<NUM> or external memory #<NUM>) that is readable by a machine (e.g., the electronic device #<NUM>). For example, a processor (e.g., the processor #<NUM>) of the machine (e.g., the electronic device #<NUM>) may invoke at least one of the one or more instructions stored in the storage medium, and execute it, with or without using one or more other components under the control of the processor.

In such a case, according to various embodiments, the integrated component may perform one or more functions of each of the plurality of components in the same or similar manner as they are performed by a corresponding one of the plurality of components before the integration.

Claim 1:
A heat dissipation sheet comprising:
a first nanofiber member (<NUM>) having a first density;
a second nanofiber member (<NUM>) attached to the first nanofiber member (<NUM>) and having a second density lower than the first density;
a heat transfer member (<NUM>) positioned on or above the second nanofiber member (<NUM>); and
a conductive material coated on at least a portion of the first nanofiber member (<NUM>) or the second nanofiber member (<NUM>), wherein at least some of the conductive material penetrates into the first nanofiber member (<NUM>) or the second nanofiber member (<NUM>).