Patent Publication Number: US-2023156902-A1

Title: Electronic device including printed circuit board structure including thermal interface material

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a PCT-Bypass application of International Application No. PCT/KR2022/016857 designating the United States, filed on Nov. 1, 2022, which claims priority to Korean Patent Application No. 10-2021-0155899, filed on Nov. 12, 2021, and Korean Patent Application No. 10-2021-0173996, filed on Dec. 7, 2021, in the Korean Intellectual Property Office, the contents of which in their entireties are herein incorporated by reference. 
    
    
     BACKGROUND 
     1. Field 
     The disclosure relates to an electronic device, e.g., to an electronic device including a printed circuit board structure for accommodating a thermal interface material. 
     2. Description of Related Art 
     An electronic device may generate a large amount of heat when performing various functions at a high performance. The heat conduction performance of the electronic device is desired to secure product stability and reliability. Accordingly, technology for conducting internal heat of the electronic device in a limited space is being actively studied. 
     A method of injecting a liquid thermal interface material (“TIM”) into an inner space of the electronic device and hardening the injected TIM is known technology for conducting heat. 
     SUMMARY 
     A range of use of electronic devices has expanded, and an increasing number of programs and applications demand high specifications. An application processor (“AP”) consumes increasingly large power to improve the performance of an electronic device. Heat generated by the electronic device may adversely affect the performance of electronic device and may be a risk to the safety of a user. Injecting a liquid thermal interface material (“TIM”) inside the electronic device is known technology for resolving issues of increased power consumption of the AP and increased heat from inside the electronic device. An inlet is desired to inject a TIM inside the electronic device. 
     When injecting the liquid TIM by forming the inlet in a surface for accommodating components, the liquid TIM may not be effectively injected because the injected direction and moving direction of the liquid TIM are not the same as one another and rather perpendicular. When using a more fluid liquid TIM for more effective injection, heat conductivity may decrease. 
     In addition, when directly injecting the liquid TIM inside the electronic device and hardening the liquid TIM, the injected liquid TIM may not be practically removed. In this case, components, to which the hardened TIM is attached, may not be easily replaced. 
     Embodiments of the disclosure provide an electronic device including a structure in which components included in the electronic device may be easily maintained, repaired, and/or replaced after a liquid TIM is hardened while increasing the injectability of the liquid TIM. 
     In an embodiment, an electronic device includes a printed circuit board (“PCB”) structure accommodating a TIM, in which the PCB structure includes a base plate, a first component on the base plate, a second component on the base plate and apart from the first component, an interposer connected to the base plate and surrounding the first component and the second component, a cover plate connected to the interposer and covering the first component and the second component, and an accommodation part which is between the base plate and a heat conduction plate and accommodates the TIM. 
     In an embodiment, an electronic device includes a PCB structure accommodating a TIM, in which the PCB structure includes a base plate, a first component on the base plate, a second component on the base plate and apart from the first component, an interposer connected to the base plate and surrounding the first component and the second component, a cover plate connected to the interposer and covering the first component and the second component, a heat conduction plate on the cover plate and facing the first component and the second component, an accommodation part which is between the base plate and the heat conduction plate, and a TIM accommodated in the accommodation part and provided in a solid state by being hardened in the accommodation part. 
     By embodiments, an electronic device includes a PCB structure, in which the PCB structure includes a base plate, a first component on the base plate, a second component on the base plate and apart from the first component, an interposer body connected to the base plate and surrounding the first component and the second component and an interposer disposed in the interposer body and including an inlet through which an inner space of the interposer body meets the outside, a cover plate connected to the interposer and covering the first component and the second component, a heat conduction plate on the cover plate and facing the first component and the second component, an accommodation part including an accommodation body and an accommodation head extending from the accommodation body and included inside the inlet, in which the accommodation body is between the base plate and the heat conduction plate, and a TIM accommodated in the accommodation part and provided in a solid state by being hardened in the accommodation part. 
     By embodiments, an electronic device including a PCB structure accommodating a TIM may increase the injectability of the TIM by injecting a liquid TIM inside the electronic device through an inlet included in an interposer such that the injected direction and moving direction of the liquid TIM approximately are parallel to one another. 
     By embodiments, an electronic device including a PCB structure accommodating a TIM may easily maintain, repair, and/or replace components included in the electronic device because the electronic device accommodates the TIM by an accommodation part. 
     In addition, various effects directly or indirectly ascertained through the disclosure may be provided. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other features and advantages of predetermined embodiments of the disclosure will be more apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    is a block diagram illustrating an embodiment of an electronic device in a network environment; 
         FIG.  2 A  is a cross-sectional view illustrating an embodiment of an electronic device with a thermal interface material (“TIM”) not being injected inside an accommodation part; 
         FIG.  2 B  is a cross-sectional view illustrating an embodiment of the electronic device with a TIM being injected inside the accommodation part; 
         FIG.  2 C  is a perspective view illustrating an embodiment of the electronic device without a cover plate and a heat conduction plate; 
         FIG.  2 D  is an exploded view illustrating an embodiment of the electronic device with the cover plate spaced apart from an interposer; 
         FIG.  3 A  is a schematic diagram illustrating an embodiment of an accommodation part with a nozzle inserted into an accommodation head; 
         FIG.  3 B  is a schematic diagram illustrating an embodiment of the accommodation part with a TIM injected inside an accommodation body; 
         FIG.  3 C  is a schematic diagram illustrating an embodiment of the accommodation part without an accommodation opening; 
         FIG.  3 D  is a schematic diagram illustrating an embodiment of the accommodation part with an accommodation head closed by a sealing; 
         FIG.  4    is a magnified perspective view of an embodiment of an interposer; 
         FIG.  5    is another magnified perspective view of an embodiment of an interposer; and 
         FIG.  6    is yet another magnified perspective view of an embodiment of an interposer. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. When describing the embodiments with reference to the accompanying drawings, like reference numerals refer to like elements and a repeated description related thereto will be omitted. 
       FIG.  1    is a block diagram illustrating an electronic device  101  in a network environment  100  in various embodiments. Referring to  FIG.  1   , the electronic device  101  in the network environment  100  may communicate with an electronic device  102  via a first network  198  (e.g., a short-range wireless communication network), or communicate with at least one of an electronic device  104  and a server  108  via a second network  199  (e.g., a long-range wireless communication network). In an embodiment, the electronic device  101  may communicate with the electronic device  104  via the server  108 . In an embodiment, the electronic device  101  may include a processor  120 , a memory  130 , an input module  150 , a sound output module  155 , a display module  160 , an audio module  170 , and a sensor module  176 , an interface  177 , a connecting terminal  178 , a haptic module  179 , a camera module  180 , a power management module  188 , a battery  189 , a communication module  190 , a subscriber identification module (“SIM”)  196 , or an antenna module  197 . In some embodiments, at least one of the components (e.g., the connecting terminal  178 ) may be omitted from the electronic device  101 , or one or more other components may be added to the electronic device  101 . In some embodiments, some of the components (e.g., the sensor module  176 , the camera module  180 , or the antenna module  197 ) may be integrated as a single component (e.g., the display module  160 ). 
     The processor  120  may execute software (e.g., a program  140 ) to control at least one other component (e.g., a hardware or software component) of the electronic device  101  connected to the processor  120  and may perform various data processing or computations, for example. In an embodiment, as at least a part of data processing or computations, the processor  120  may store a command or data received from another component (e.g., the sensor module  176  or the communication module  190 ) in a volatile memory  132 , process the command or the data stored in the volatile memory  132 , and store resulting data in a non-volatile memory  134 . In an embodiment, the processor  120  may include a main processor  121  (e.g., a central processing unit (“CPU”) or an application processor (“AP”)), or an auxiliary processor  123  (e.g., a graphics processing unit (“GPU”), a neural processing unit (“NPU”), an image signal processor (“ISP”), a sensor hub processor, or a communication processor (“CP”)) that is operable independently from or in conjunction with the main processor  121 . In an embodiment, when the electronic device  101  includes the main processor  121  and the auxiliary processor  123 , the auxiliary processor  123  may be adapted to consume less power than power of the main processor  121  or to be specific to a specified function, for example. The auxiliary processor  123  may be implemented separately from the main processor  121  or as a part of the main processor  121 . 
     The auxiliary processor  123  may control at least some of functions or states related to at least one (e.g., the display module  160 , the sensor module  176 , or the communication module  190 ) of the components of the electronic device  101 , instead of the main processor  121  while the main processor  121  is in an inactive (e.g., sleep) state or along with the main processor  121  while the main processor  121  is an active state (e.g., executing an application). In an embodiment, the auxiliary processor  123  (e.g., an ISP or a CP) may be implemented as a portion of another component (e.g., the camera module  180  or the communication module  190 ) that is functionally related to the auxiliary processor  123 . In an embodiment, the auxiliary processor  123  (e.g., an NPU) may include a hardware structure specifically for artificial intelligence model processing. An artificial intelligence model may be generated by machine learning. The machine learning may be performed by the electronic device  101 , in which artificial intelligence is performed, or performed via a separate server (e.g., the server  108 ), for example. Learning algorithms may include, but are not limited to supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, for example. The artificial intelligence (“AI”) model may include a plurality of artificial neural network layers. An artificial neural network may include a deep neural network (“DNN”), a convolutional neural network (“CNN”), a recurrent neural network (“RNN”), a restricted Boltzmann machine (“RBM”), a deep belief network (“DBN”), and a bidirectional recurrent deep neural network (“BRDNN”), a deep Q-network (“DQN”), or a combination of two or more thereof, for example, but is not limited thereto. The AI model may additionally or alternatively include a software structure other than the hardware structure. 
     The memory  130  may store various pieces of data used by at least one component (e.g., the processor  120  or the sensor module  176 ) of the electronic device  101 . The various pieces of data may include software (e.g., the program  140 ) and input data or output data for a command related thereto, for example. The memory  130  may include the volatile memory  132  or the non-volatile memory  134 . 
     The program  140  may be stored as software in the memory  130  and may include an operating system (“OS”)  142 , middleware  144 , or an application  146 , for example. 
     The input module  150  may receive, from outside (e.g., a user) the electronic device  101 , a command or data to be used by another component (e.g., the processor  120 ) of the electronic device  101 . The input module  150  may include a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen), for example. 
     The sound output module  155  may output a sound signal to the outside of the electronic device  101 . The sound output module  155  may include a speaker or a receiver, for example. The speaker may be used for general purposes, such as playing multimedia or playing a recording. The receiver may be used to receive an incoming call. In an embodiment, the receiver may be implemented separately from the speaker or as a part of the speaker. 
     The display module  160  may visually provide information to the outside (e.g., a user) of the electronic device  101 . The display module  160  may include a control circuit for controlling a display, a hologram device, or a projector and control circuitry to control its corresponding one of the display, the hologram device, and the projector, for example. In an embodiment, the display module  160  may include a touch sensor adapted to detect a touch, or a pressure sensor adapted to measure the intensity of force of the touch. 
     The audio module  170  may convert sound into an electric signal or vice versa. In an embodiment, the audio module  170  may obtain the sound via the input module  150  or output the sound via the sound output module  155  or an external electronic device (e.g., the electronic device  102 , such as a speaker or headphones) directly or wirelessly connected to the electronic device  101 . 
     The sensor module  176  may detect an operational state (e.g., power or temperature) of the electronic device  101  or an environmental state (e.g., a state of a user) external to the electronic device  101  and generate an electric signal or data value corresponding to the detected state. In an embodiment, the sensor module  176  may include a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (“IR”) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor, for example. 
     The interface  177  may support one or more specified protocols to be used by the electronic device  101  to couple with the external electronic device (e.g., the electronic device  102 ) directly (e.g., by wire) or wirelessly. In an embodiment, the interface  177  may include a high-definition multimedia interface (“HDMI”), a universal serial bus (“USB”) interface, a secure digital (“SD”) card interface, or an audio interface, for example. 
     The connecting terminal  178  may include a connector via which the electronic device  101  may be physically connected to an external electronic device (e.g., the electronic device  102 ). In an embodiment, the connecting terminal  178  may include an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphones connector), for example. 
     The haptic module  179  may convert an electric signal into a mechanical stimulus (e.g., a vibration or a movement) or an electrical stimulus, which may be recognized by a user via tactile sensation or kinesthetic sensation of the user. In an embodiment, the haptic module  179  may include a motor, a piezoelectric element, or an electric stimulator, for example. 
     The camera module  180  may capture a still image and moving images. In an embodiment, the camera module  180  may include one or more lenses, image sensors, ISPs, and flashes. 
     The power management module  188  may manage power supplied to the electronic device  101 . In an embodiment, the power management module  188  may be implemented as at least a part of a power management integrated circuit (“PMIC”), for example. 
     The battery  189  may supply power to at least one component of the electronic device  101 . In an embodiment, the battery  189  may include a primary cell, which is not rechargeable, a secondary cell, which is rechargeable, or a fuel cell, for example. 
     The communication module  190  may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device  101  and the external electronic device (e.g., the electronic device  102 , the electronic device  104 , or the server  108 ) and performing communication via the established communication channel. The communication module  190  may include one or more CPs that are operable independently from the processor  120  (e.g., an AP) and that support direct (e.g., wired) communication or wireless communication. In an embodiment, the communication module  190  may include a wireless communication module  192  (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (“GNSS”) communication module) or a wired communication module  194  (e.g., a local area network (“LAN”) communication module, or a power line communication (“PLC”) module). A corresponding one of these communication modules may communicate with the external electronic device, e.g., the electronic device  104 , via the first network  198  (e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (“Wi-Fi”) direct, or IR data association (“IrDA”)) or the second network  199  (e.g., a long-range communication network, such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or a wide area network (“WAN”)). These various types of communication modules may be implemented as a single component (e.g., a single chip), or may be implemented as multiple components (e.g., multiple chips) separated from each other. The wireless communication module  192  may identify and authenticate the electronic device  101  in a communication network, such as the first network  198  or the second network  199 , using subscriber information (e.g., international mobile subscriber identity (“IMSI”)) stored in the SIM  196 . 
     The wireless communication module  192  may support a 5G network after a 4G network, and next-generation communication technology, e.g., new radio (“NR”) access technology. The NR access technology may support enhanced mobile broadband (“eMBB”), massive machine type communications (“mMTC”), or ultra-reliable and low-latency communications (“URLLC”). The wireless communication module  192  may support a high-frequency band (e.g., a mmWave band) to achieve a high data transmission rate, for example. The wireless communication module  192  may support various technologies for securing performance on a high-frequency band, such as beamforming, massive multiple-input and multiple-output (“MIMO”), full dimensional MIMO (“FD-MIMO”), an array antenna, analog beam-forming, or a large-scale antenna. The wireless communication module  192  may support various requirements specified in the electronic device  101 , an external electronic device (e.g., the electronic device  104 ), or a network system (e.g., the second network  199 ). In an embodiment, the wireless communication module  192  may support a peak data rate (e.g., 20 gigabits per second (Gbps) or more) for implementing eMBB, loss coverage (e.g., 164 decibels (dB) or less) for implementing mMTC, or U-plane latency (e.g., 0.5 millisecond (ms) or less for each of downlink (“DL”) and uplink (“UL”), or a round trip of 1 ms or less) for implementing URLLC. 
     The antenna module  197  may transmit or receive a signal or power to or from the outside (e.g., the external electronic device) of the electronic device  101 . In an embodiment, the antenna module  197  may include an antenna including a radiating element including a conductive material or a conductive pattern formed or provided in or on a substrate (e.g., a printed circuit board (“PCB”)). In an embodiment, the antenna module  197  may include a plurality of antennas (e.g., an antenna array). In such a case, at least one antenna appropriate for a communication scheme used in a communication network, such as the first network  198  or the second network  199 , may be selected by the communication module  190  from the plurality of antennas, for example. The signal or power may be transmitted or received between the communication module  190  and the external electronic device via the at least one selected antenna. In an embodiment, another component (e.g., a radio frequency integrated circuit (“RFIC”)) other than the radiating element may be additionally formed or provided as a part of the antenna module  197 . 
     In various embodiments, the antenna module  197  may form a mmWave antenna module. In an embodiment, the mmWave antenna module may include a PCB, an RFIC on a first surface (e.g., the bottom surface) of the PCB, or adjacent to the first surface of the PCB and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., array antennas) disposed on a second surface (e.g., the top or a side surface) of the PCB, or adjacent to the second surface of the PCB and capable of transmitting or receiving signals of the designated high-frequency band. 
     At least some of the above-described components may be coupled mutually and exchange signals (e.g., commands or data) therebetween via an inter-peripheral communication scheme (e.g., a bus, general purpose input and output (“GPIO”), serial peripheral interface (“SPI”), or mobile industry processor interface (“MIPI”)). 
     In an embodiment, commands or data may be transmitted or received between the electronic device  101  and the external electronic device (e.g., the electronic device  104 ) via the server  108  coupled with the second network  199 . Each of the external electronic devices (e.g., the electronic device  102  or  104 ) may be a device of the same type as or a different type from the electronic device  101 . In an embodiment, all or some of operations to be executed by the electronic device  101  may be executed by one or more external electronic devices (e.g., the electronic devices  102  and  104  and the server  108 ). In an embodiment, when the electronic device  101  is desired to perform a function or a service automatically, or in response to a request from a user or another device, the electronic device  101 , instead of, or in addition to, executing the function or the service, may request the one or more external electronic devices to perform at least part of the function or service, for example. The one or more external electronic devices receiving the request may perform the at least part of the function or service, or an additional function or an additional service related to the request and may transfer a result of the performance to the electronic device  101 . The electronic device  101  may provide the result, with or without further processing the result, as at least part of a response to the request. To that end, cloud computing, distributed computing, mobile edge computing (“MEC”), or client-server computing technology may be used, for example. The electronic device  101  may provide ultra-low-latency services using distributed computing or MEC, for example. In an embodiment, the external electronic device (e.g., the electronic device  104 ) may include an Internet-of-things (“IoT”) device. The server  108  may be an intelligent server using machine learning and/or a neural network. In an embodiment, the external electronic device (e.g., the electronic device  104 ) or the server  108  may be included in the second network  199 . The electronic device  101  may be applied to intelligent services (e.g., a smart home, a smart city, a smart car, or healthcare) based on 5G communication technology or IoT-related technology. 
     The electronic device in various embodiments may be one of various types of electronic devices. The electronic device may include a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device, for example. In an embodiment of the disclosure, the electronic device is not limited to those described above. 
     It should be understood that various embodiments of the disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments and include various changes, equivalents, or replacements for a corresponding embodiment. In connection with the description of the drawings, like reference numerals may be used for similar or related components. It is to be understood that a singular form of a noun corresponding to an item may include one or more of the things unless the relevant context clearly indicates otherwise. As used herein, “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A, B, or C,” each of which may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof. Terms such as “first”, “second”, or “first” or “second” may simply be used to distinguish the component from other components in question, and do not limit the components in other features (e.g., importance or order). It is to be understood that when an element (e.g., a first element) is referred to, with or without the term “operatively” or “communicatively”, as “coupled with,” “coupled to,” “connected with,” or “connected to” another element (e.g., a second element), it means that the element may be coupled with the other element directly (e.g., by wire), wirelessly, or via a third element. 
     As used in connection with various embodiments of the disclosure, the term “module” may include a unit implemented in hardware, software, or firmware, and may interchangeably be used with other terms, e.g., “logic,” “logic block,” “part,” or “circuitry”. A module may be a single integral component, or a minimum unit or part thereof, adapted to perform one or more functions. In an embodiment, the module may be implemented in a form of an application-specific integrated circuit (“ASIC”), for example. 
     Various embodiments as set forth herein may be implemented as software (e.g., the program  140 ) including one or more instructions that are stored in a storage medium (e.g., the internal memory  136  or the external memory  138 ) that is readable by a machine (e.g., the electronic device  101 ). In an embodiment, a processor (e.g., the processor  120 ) of the machine (e.g., the electronic device  101 ) may invoke at least one of the one or more instructions stored in the storage medium and execute the at least one of the one or more instructions, for example. This allows the machine to be operated to perform at least one function according to the at least one instruction invoked. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, the term “non-transitory” simply means that the storage medium is a tangible device, and does not include a signal (e.g., an electromagnetic wave), but this term does not differentiate between where data is semi-permanently stored in the storage medium and where the data is temporarily stored in the storage medium. 
     In an embodiment, a method in various embodiments of the disclosure may be included and provided in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., a compact disc read-only memory (“CD-ROM”)), or be distributed (e.g., downloaded or uploaded) online via an application store (e.g., PlayStore™), or between two user devices (e.g., smartphones) directly. When distributed online, at least part of the computer program product may be temporarily generated or at least temporarily stored in the machine-readable storage medium, such as a memory of the manufacturer&#39;s server, a server of the application store, or a relay server. 
     In various embodiments, each component (e.g., a module or a program) of the above-described components may include a single entity or multiple entities, and some of the multiple entities may be separately disposed in different components. In various embodiments, one or more of the above-described components may be omitted, or one or more other components may be added. Alternatively or additionally, a plurality of components (e.g., modules or programs) may be integrated into a single component. In such a case, in various embodiments, the integrated component may still perform one or more functions of each of the plurality of components in the same or similar manner as the one or more functions are performed by a corresponding one of the plurality of components before the integration. In various embodiments, operations performed by the module, the program, or another component may be carried out sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order or omitted, or one or more other operations may be added. 
       FIG.  2 A  is a cross-sectional view illustrating an embodiment of an electronic device with a thermal interface material (“TIM”) not injected inside an accommodation part (e.g., pocket).  FIG.  2 B  is a cross-sectional view illustrating an embodiment of the electronic device with a TIM injected inside the accommodation part (e.g., pocket).  FIG.  2 C  is a perspective view illustrating an embodiment of the electronic device without a cover plate and a heat conduction plate.  FIG.  2 D  is an exploded view illustrating an embodiment of the electronic device with the cover plate spaced apart from an interposer. 
     Referring to  FIGS.  2 A to  2 D , the electronic device (e.g., the electronic device  101  of  FIG.  1   ) may include a PCB structure  200 . The PCB structure  200  may include a TIM T inside the PCB structure  200 . The TIM T may not be directly injected inside the PCB structure  200  and may be injected inside an accommodation part (e.g., pocket  29 ) in the PCB structure  200 . The PCB structure  200  may include a plurality of components. The PCB structure  200  may include a third component  25  on a first surface (e.g., lower surface in  FIG.  2 A ) of a base plate  24 , a first component  27  on a second surface (e.g., upper surface in  FIG.  2 A ) of the base plate  24 , and/or a second component  28  on the second surface of the base plate  24 . In an embodiment, the first surface of the base plate  24  may face a cover plate  22  and the second surface of the base plate  24  may face the opposite direction of the first surface of the base plate  24 , for example. Any component of the plurality of components may be at a relatively high temperature. Among the plurality of components, a component inside the PCB structure  200 , operating at a relatively high temperature, and emitting heat around the component may be hereinafter referred to as a “first component”. A component inside the electronic device and operating at a relatively low temperature compared to the “first component” may be hereinafter referred to as a “second component”. A component on a second surface of the PCB structure  200  may be hereinafter referred to as a “third component”. 
     In an embodiment, the third component  25 , the first component  27 , and/or the second component  28  may be one of a processor (e.g., the processor  120  of  FIG.  1   ), a memory (e.g., the memory  130  of  FIG.  1   ), an input module (e.g., the input module  150  of  FIG.  1   ), a sound output module (e.g., the sound output module  155  of  FIG.  1   ), a display module (e.g., the display module  160  of  FIG.  1   ), an audio module (e.g., the audio module  170  of  FIG.  1   ), a sensor module (e.g., the sensor module  176  of  FIG.  1   ), an interface (e.g., the interface  177  of  FIG.  1   ), a connecting terminal (e.g., the connecting terminal  178  of  FIG.  1   ), a haptic module (e.g., the haptic module  179  of  FIG.  1   ), a camera module (e.g., the camera module  180  of  FIG.  1   ), a power management module (e.g., the power management module  188  of  FIG.  1   ), and a battery (e.g., the battery  189  of  FIG.  1   ). 
     In an embodiment, the first component  27  may be a component of which the temperature is relatively higher than a temperature of any other components inside the PCB structure  200 . In an embodiment, the first component  27  may include an AP, for example. Although only one second component (e.g., the second component  28 ) is illustrated inside the PCB structure  200  in the drawings, the number of second components  28  may not be limited thereto. 
     In an embodiment, the PCB structure  200  may include a heat conduction plate  21 , the cover plate  22 , an interposer  23 , the base plate  24 , and/or a cover  26 . 
     The base plate  24  may include a plurality of components (e.g., the third component  25 , the first component  27 , and the second component  28 ) on the base plate  24 . One surface of the base plate  24  may be on the third component  25 , and the other surface of the base plate  24  may be on the first component  27  and/or the second component  28 . The first component  27  may have a relatively higher temperature than a temperature of the second component  28 . The base plate  24  may have a plate shape. In an embodiment, the base plate  24  may include a PCB including a plurality of conductive layers and insulating layers, for example. Although the base plate  24  is illustrated as having a flat plate shape in the drawings, the disclosure is not limited thereto. In an embodiment, the base plate  24  may include a curved surface, for example. In another embodiment, the base plate  24  may have at least one bent shape. 
     In one embodiment, the interposer  23  may be on the base plate  24 . In an embodiment, the interposer  23  may be electrically connected to the base plate  24 , for example. In another embodiment, the interposer  23  may be unitary with the base plate  24  as one body. In one embodiment, the interposer  23  may have a loop shape forming a closed curve. At least a portion of the interposer  23  may surround the first component  27  and the second component  28 . The interposer  23  may include an interposer body  231  and an inlet  232 , for example. 
     In one embodiment, the interposer  23  may be on the cover plate  22 . In an embodiment, the interposer  23  may be unitary with the cover plate  22  as one body, for example. In one embodiment, the interposer  23  may be on the edge of the cover plate  22  and surround the pocket  29 . In this structure, the interposer  23  may protect the pocket  29  from external impact before attaching to the base plate  24 . 
     In one embodiment, the interposer  23  may electrically connect the base plate  24  to the cover plate  22  such that the base plate  24  and the cover plate  22  may transmit and receive signals to and from each other. The interposer  23  may shield from electromagnetic waves. The interposer  23  may include a PCB having at least two layers and include a plurality of signal lines and ground lines. In an embodiment, one side of the interposer  23  may include a plated part for shielding from the electromagnetic waves, for example. 
     In one embodiment, the interposer body  231  may approximately have a ring shape. The height of the interposer  231  may be greater than the heights of the first component  27  and the second component  28 , for example. The cover plate  22 , when being on the interposer body  231 , may be spaced apart from the first component  27  and the second component  28 . 
     In one embodiment, the inlet  232  may be disposed in the interposer body  231 . A space defined by the cover plate  22 , the base plate  24 , and the interposer body  231  may be extended to the outside by the inlet  232 . Through the inlet  232 , the TIM T may be injected inside the PCB structure  200 . In an embodiment, the TIM T may be injected inside the pocket  29  in a direction parallel to an x-y plane, for example. The TIM T injected inside the pocket  29  may be spread out on the x-y plane. Since a direction in which the TIM T is injected may approximately be parallel to the x-y plane on which the TIM T spreads out, the TIM T may be easily injected inside the pocket  29 . 
     In one embodiment, the interposer body  231  may be separated into two sides around the inlet  232 . In an embodiment, the base plate  24  and the cover plate  22  may face each other around the inlet  232 , for example. 
     In one embodiment, the cover plate  22  may be electrically connected to the interposer  23 . In an embodiment, the cover plate  22  may be on the interposer  23 . In another embodiment, the cover plate  22  may be unitary with the interposer  23  as one body, for example. The base plate  24 , the interposer  23 , and the cover plate  22  may define a space. The cover plate  22  may include a PCB including a plurality of conductive layers and insulating layers. 
     In one embodiment, the heat conduction plate  21  may absorb some of the heat emitted from the first component  27 . The heat conduction plate  21  may be on the cover plate  22 . In an embodiment, the heat conduction plate  21  may face the first component  27  and the second component  28 , for example. At least a portion of the heat conduction plate  21  may contact the pocket  29 . 
     In one embodiment, the cover  26  may include a shield can. 
     In one embodiment, the TIM T may be filled in the pocket  29 . The TIM T may include mineral oil, grease, gap filling putty, phase change gel, phase change material pads, or particle filling epoxy, for example. However, the disclosure is not limited to the foregoing examples, and the TIM T may include various materials having excellent heat conductivity. 
     In one embodiment, the TIM T may be provided in a solid state by being hardened inside the pocket  29 . The TIM T may be spaced apart, by the pocket  29 , from the base plate  24  and the cover plate  22 . The TIM T may surround at least a portion of the first component  27 . In an embodiment, the pocket  29  may cover at least a portion of a surface of the first component  27 , not in contact with the base plate  24 , for example. The TIM T may be provided in a solid state by being hardened inside the pocket  29 , for example. 
     In one embodiment, the TIM T may be provided in an unhardened state and inside the pocket  29 . 
     In one embodiment, the pocket  29  may accommodate the TIM T. The pocket  29  may prevent the TIM T from directly contacting the base plate  24 , the heat conduction plate  21 , the first component  27 , and the second component  28 . In one embodiment, the pocket  29  may have a porous structure in which air inside may escape to the outside. Since the pocket  29  has a porous structure, the TIM T may be more efficiently filled inside the pocket  29 . The size of a micro hole defined in the porous structure may be smaller than a particle size of a liquid TIM T. In an embodiment, while the TIM T is injected inside the pocket  29 , air inside the pocket  29  may leak to the outside through the porous structure, for example. The air may be discharged to the outside through the inlet  232 . In one embodiment, the accommodation part (e.g., pocket  29 ) may include an accommodation body (e.g., pocket body  291 ) or an accommodation head (e.g., pocket head  292 ). In an embodiment, an accommodation opening (e.g., pocket opening  293 ) may be defined in the accommodation part (e.g., pocket  29 ). 
     The pocket body  291  may be accommodated inside the interposer body  231  and an accommodation space S for accommodating the TIM T may be defined in the pocket body  291 . 
     The pocket head  292  may extend from the pocket body  291  and be in the inlet  232 . 
     The pocket opening  293  may extend from the pocket head  292  and have a shape of which the width increases in a direction away from the pocket body  291 . In this structure, a user or an automated device (e.g., robot with a sensor) may easily insert a nozzle (not shown) into the pocket  29 . 
     Assembling the PCB structure  200  and filling the TIM T inside the PCB structure  200  are described hereinafter. 
     The pocket  29  may be in a space defined by the cover plate  22 , the base plate  24 , and the interposer  23 . In an embodiment, the pocket  29  may be in a space defined by the base plate  24  and the interposer  23 , and the cover plate  22  may be connected to the interposer  23  in the—z direction, for example. The pocket head  292  of the pocket  29  may be included in the inlet  232  (refer to  FIG.  2 C ) with the cover plate  22  connected to the interposer  23 . In this case, the pocket  29  may maintain a flat shape. 
     After the cover plate  22 , the base plate  24 , and the interposer  23  are soldered to one another, the TIM T may be injected into the pocket  29 . In an embodiment, the TIM T may be injected into the pocket  29  after soldering the cover plate  22 , the base plate  24 , and the interposer  23  to one another, which may prevent the pocket  29  from expanding before soldering the cover plate  22 , the base plate  24 , and the interposer  23  to one another, for example. By doing so, a defect in a solder joint may be caused less by the pocket  29 . 
     The nozzle (not shown) may be fastened on the pocket opening  293 . The TIM T discharged from the nozzle fastened to the pocket  29  may fill the pocket body  291 . While the TIM T is filled in the pocket body  291 , the pocket  29  may gradually inflate. In an embodiment, at least a portion of the pocket  29  may expand to a space between the first component  27  and the second component  28 , for example. The pocket  29  may expand until at least a portion of the first component  27  and the second component  28  are surrounded. In an embodiment, at least a portion of the pocket  29  may contact the base plate  24 , for example. 
     Of the first component  27 , a surface facing the -z direction may contact the base plate  24 , and the remaining surfaces may be covered by the pocket  29 . The TIM T may absorb heat emitted from the first component  27 . 
     In one embodiment, the first component  27  and the second component  28  may need to be maintained, repaired, and/or replaced. In this case, a user, by removing the pocket  29  after removing the cover plate  22 , may easily maintain, repair, and replace the first component  27  and/or the second component  28 . 
       FIG.  3 A  is a schematic diagram illustrating an embodiment of a pocket with a nozzle inserted into a pocket head.  FIG.  3 B  is a schematic diagram illustrating an embodiment of the pocket with a TIM injected inside a pocket body.  FIG.  3 C  is a schematic diagram illustrating an embodiment of the pocket without a pocket opening.  FIG.  3 D  is a schematic diagram illustrating an embodiment of a pocket with a pocket head closed by a sealing member. 
     Referring to  FIGS.  3 A to  3 D , a pocket  39  (e.g., the pocket  29 ) may include a pocket body  391 , a pocket head  392  extending from the pocket body  391 , a pocket opening  393  extending from the pocket head  392 , or a sealing member R coupled to the pocket head  392 . 
     The pocket body  391  may accommodate a TIM T. 
     The pocket head  392  may extend from the pocket body  391  and pass through an interposer  33 . The interposer  33  may include an interposer body  331  and an inlet  332  disposed in one side of the interposer body  331 . The pocket head  392  may be in the inlet  332 . 
     The pocket opening  393  may have a shape of which the width increases in a direction away from the pocket body  391 . A nozzle N may be inserted through the pocket opening  393 . 
     The sealing member R may close an inner space of the pocket body  391 . In an embodiment, when the TIM T is sufficiently injected into the pocket body  391 , the pocket opening  393  may be removed, for example. When the pocket opening  393  has been removed, a user or an automated device (e.g., robot with a sensor) may seal the pocket head  392  with the sealing member R. A cap (not shown) for closing the inlet  332  may be on the inlet  332 . 
       FIG.  4    is a magnified perspective view of an embodiment of an interposer. 
     Referring to  FIG.  4   , an interposer  43  (e.g., the interposer  23  of  FIG.  2 A ) may be on a base plate  44  (e.g., the base plate  24  of  FIG.  2 A ). The interposer  43  may include an interposer body  431  (e.g., the interposer body  231  of  FIG.  2 C ) or an inlet  432  (e.g., the inlet  232  of  FIG.  2 C ) disposed in the interposer body  431 . The base plate  44  may be exposed around the inlet  432 . In this structure, because the area of the inlet  432  may be substantially large, a TIM T having relatively large particles may be easily used. 
       FIG.  5    is another magnified perspective view of an embodiment of an interposer. 
     Referring to  FIG.  5   , an interposer  53  may be on a base plate  54 . The interposer  53  may include an interposer body  531  or an inlet  532  disposed through the interposer body  531 . In this structure, a user or an automated device (e.g., robot with a sensor), after injecting a TIM T inside a pocket (not shown) (e.g., the pocket  29 ), may easily close the inlet  532 . 
       FIG.  6    is yet another magnified perspective view of an embodiment of an interposer. 
     Referring to  FIG.  6   , an interposer  63  may be on a base plate  64 . The interposer  63  may include an interposer body  631  or an inlet  632  disposed through the interposer body  631 . The inlet  632  may have a shape recessed from a surface, of the interposer body  631 , facing a cover plate (not shown). In this structure, a user or an automated device (e.g., robot with a sensor), after interposer body  631  is on the base plate  64 , may form the inlet  632  later, when desired. 
     By embodiments, an electronic device includes a PCB structure accommodating a TIM, in which the PCB structure includes a base plate  24 , a first component  27  on the base plate  24 , a second component  28  on the base plate  24  and spaced apart from the first component  27 , an interposer  23  connected to the base plate  24  and surrounding the first component  27  and the second component  28 , a cover plate  22  connected to the interposer  23  and covering the first component  27  and the second component  28 , and a pocket  29  which is between the base plate  24  and a heat conduction plate  21  and accommodates the TIM. 
     The PCB structure may further include a TIM T accommodated in the pocket  29 . 
     The TIM T may be spaced apart from the base plate  24  and the cover plate  22  by the pocket  29 . 
     With the TIM T in the pocket  29 , the pocket  29  may contact the base plate  24 . 
     The TIM T may be provided in a solid state by being hardened inside the pocket  29 . 
     The PCB structure may be on the cover plate  22  and may further include a heat conduction plate  21  facing the first component  27  and the second component  28 . 
     The pocket  29  may attach to the heat conduction plate  21 . 
     The interposer  23  may include an interposer body  231  and an inlet  232  disposed in the interposer body  231 . The interposer body  231  surrounds the first component  27  and the second component  28 , and the inlet  232  accommodates at least a portion of the pocket  29 . 
     The pocket  29  may include a pocket body  291  and a pocket head  292  extending from the pocket body  291  and inside the inlet  232 . The pocket body  291  may be accommodated inside the interposer body  231  and an accommodation space S (refer to  FIG.  2 A ) for accommodating the TIM T may be defined in the pocket body  291 . 
     The pocket  29  may further include a pocket opening  293  extending from the pocket head  292  and having a shape of which the width increases in a direction away from the pocket body  291 . 
     The pocket  29  may further include a sealing member R coupled to the pocket head  292 . 
     The inlet  232  may be disposed through the interposer body  231  and having a shape surrounded by the interposer body  231 . 
     The inlet  232  may have a shape recessed from a surface, of the interposer body  231 , facing the cover plate  22 . 
     The pocket  29  may have a porous structure in which air inside the pocket  29  may escape to the outside. 
     At least a portion of the pocket  29  may be between the first component  27  and the second component  28 . 
     By embodiments, an electronic device includes a PCB structure accommodating a TIM, in which the PCB structure includes a base plate  24 , a first component  27  on the base plate  24 , a second component  28  on the base plate  24  and spaced apart from the first component  27 , an interposer  23  connected to the base plate  24  and surrounding the first component  27  and the second component  28 , a cover plate  22  connected to the interposer  23  and covering the first component  27  and the second component  28 , a heat conduction plate  21  on the cover plate  22  and facing the first component  27  and the second component  28 , a pocket  29  which is between the base plate  24  and the heat conduction plate  21  and accommodates the TIM, and a TIM T provided in a solid state by being hardened in the pocket  29 . 
     The TIM T may be spaced apart from the base plate  24  and the cover plate  22  by the pocket  29 . 
     The pocket  29  may be provided with one side of the pocket  29  attached to the heat conduction plate  21  and the other side of the pocket  29  contacting the base plate  24 . 
     At least a portion of the pocket  29  may be between the first component  27  and the second component  28 . 
     By embodiments, an electronic device includes a PCB structure, in which the PCB structure includes a base plate  24 , a first component  27  on the base plate  24 , a second component  28  on the base plate  24  and spaced apart from the first component  27 , an interposer  23  including an interposer body  231  and an inlet  232  through which an inner space of the interposer body  231  meets the outside, in which the interposer  23  is connected to the base plate  24  and surrounds the first component  27  and the second component  28 , a cover plate  22  connected to the interposer  23  and covering the first component  27  and the second component  28 , a heat conduction plate  21  on the cover plate  22  and facing the first component  27  and the second component  28 , a pocket  29  including a pocket body  291  and a pocket head  292  extending from the pocket body  291 , in which the pocket body  291  is between the base plate  24  and the heat conduction plate  21 , and pocket head  292  is inside the inlet  232 , and a TIM T accommodated in the pocket  29  and provided in a solid state by being hardened in the pocket  29 .