Patent Publication Number: US-2023142809-A1

Title: Electronic device including adhesion member

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation application, claiming priority under § 365(c), of an International application No. PCT/KR2022/015545, filed on Oct. 14, 2022, which is based on and claims the benefit of a Korean patent application number 10-2021-0154114, filed on Nov. 10, 2021, in the Korean Intellectual Property Office, and of a Korean patent application number 10-2021-0168596, filed on Nov. 30, 2021, in the Korean Intellectual Property Office, the disclosure of each of which is incorporated by reference herein in its entirety. 
    
    
     TECHNICAL FIELD 
     The disclosure relates to an electronic device including an adhesion member. 
     BACKGROUND ART 
     Thanks to dazzling progresses of information/communication technologies and semiconductor technologies, various electronic devices are very increasingly distributed and used. In particular, recent electronic devices have been developed to perform communication while being carried. These electronic devices have a convergence function for complexly performing one or more functions. 
     The electronic devices tend to have various shapes and functions to satisfy purchase demands of consumers. Furthermore, a front plate for covering a display panel of an electronic device and a rear plate that covers a rear surface of the electronic device may implement a structure, in which it extends even to a side surface of the electronic device, to provide an appealing feeling to a user. 
     The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure. 
     DISCLOSURE 
     Technical Problem 
     The rear plate that extends to the side surface of the electronic device may be attached to the side member through an adhesion member. When the rear plate fails to be properly attached to the side member, an external appearance error, such as coming-over of the rear plate may occur. 
     Aspects of the disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the disclosure is to provide an electronic device that may enhance an adhesion force between a rear plate and a side member. 
     Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments. 
     Technical Solution 
     In accordance with an aspect of the disclosure, an electronic device is provided. The electronic device includes a first plate including a flat area facing a first direction and a curved area extending from at least a portion of a periphery of the flat area, a second plate facing a second direction that is opposite to the first direction, a side member surrounding an interior space between the first plate and the second plate and including a first outer surface facing the flat area, and a second outer surface facing the curved area, a plurality of adhesion tunnels formed to pass through the side member from the first outer surface to the second outer surface, and an adhesion member filled in interiors of the plurality of adhesion tunnels to be formed between the first plate and the side member, and contacting the curved area and the flat area, and each of the plurality of adhesion tunnels includes a first hole area overlapping the flat area, and passing through the first outer surface, a second hole area overlapping the curved area, and passing through the second outer surface, and a connection area disposed between the first hole area and the second hole area, and connecting the first hole area and the second hole area. 
     In accordance with another aspect of the disclosure, an electronic device is provided. The electronic device includes a rear plate including a flat area facing a first direction and a curved area extending from at least a portion of a periphery of the flat area, a front plate facing a second direction that is opposite to the first direction, a side member surrounding an interior space between the rear plate and the front plate, and having a plurality of adhesion tunnels facing the curved area from the flat area, and an adhesion member filled in interiors of the plurality of adhesion tunnels to be formed between the rear plate and the side member, and contacting the curved area and the flat area, each of the plurality of adhesion tunnels includes a first hole area overlapping the flat area and opened toward the flat area, a second hole area overlapping the curved area and opened toward the curved area, and a connection area disposed between the first hole area and the second hole area, and connecting the first hole area and the second hole area. 
     Advantageous Effects 
     According to the electronic device according to the embodiments disclosed in the disclosure, the rear plate and the side member may be coupled to each other through the adhesion member formed in the “L”-shaped adhesion tunnel. 
     The electronic device according to the embodiments disclosed in the disclosure may prevent a coming-over phenomenon of the rear plate and a gap defect phenomenon between the rear plate and the side member. 
     According to the electronic device according to the embodiments disclosed in the disclosure, adhesion force may be enhanced because the curved area of the rear plate defines a plurality of contact surfaces with the first adhesion members that passed through the plurality of adhesion tunnels. 
     According to the electronic device according to the embodiments disclosed in the disclosure, costs may be reduced and adhesion force may be enhanced by using a pressure sensitive adhesive of low costs and an excellent adhesion force as compared with a double-sided tape. 
     In addition, the disclosure may provide various effects that are directly or indirectly recognized. 
     Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure. 
    
    
     
       DESCRIPTION OF DRAWINGS 
       The above and other aspects, features, and advantages of certain embodiments of the disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    illustrates a perspective view illustrating a front surface of an electronic device according to an embodiment of the disclosure; 
         FIG.  2    illustrates a perspective view illustrating a rear surface of an electronic device according to an embodiment of the disclosure; 
         FIG.  3    illustrates an exploded perspective view illustrating an electronic device according to an embodiment of the disclosure; 
         FIG.  4    is an exploded perspective view illustrating a joining structure between a rear plate and a housing of an electronic device according to an embodiment of the disclosure; 
         FIG.  5    is a cross-sectional view of an electronic device, taken along line A-A′ of  FIG.  4    according to an embodiment of the disclosure; 
         FIGS.  6 A and  6 B  are cross-sectional views illustrating various embodiments, in which area {circle around ( 1 )} of  FIG.  5    is enlarged according to various embodiments of the disclosure; 
         FIGS.  7 A,  7 B,  7 C, and  7 D  are views illustrating an adhesion tunnel of an electronic device according to various embodiments of the disclosure; 
         FIGS.  8 A and  8 B  are views illustrating a first adhesion member and a second adhesion member of an electronic device according to various embodiments of the disclosure; 
         FIG.  9    is a perspective view illustrating an electronic device including a partition wall member according to an embodiment of the disclosure; 
         FIGS.  10 A and  10 B  are cross-sectional views illustrating various embodiments of a protruding member illustrated in  FIG.  9    according to various embodiments of the disclosure; 
         FIG.  11    is a view illustrating an electronic device including a side member having a convexo-concave surface according to an embodiment of the disclosure; and 
         FIGS.  12 A,  12 B,  12 C,  12 D, and  12 E  are views illustrating a method for manufacturing an electronic device according to various embodiments of the disclosure. 
     
    
    
     Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures. 
     MODE FOR INVENTION 
     The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modification of the various embodiments described herein can be made without departing from the scope and spirit of the disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness. 
     The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustration purpose only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents. 
     It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces. 
       FIG.  1    is a front perspective view of an electronic device according to an embodiment of the disclosure. 
       FIG.  2    is a rear perspective view of an electronic device according to an embodiment of the disclosure. 
     Referring to  FIGS.  1  and  2   , an electronic device  101  (e.g., an electronic device  401  in  FIG.  5   ) may include a housing  110  including a first surface (or a front surface)  110 A, a second surface (or a rear surface)  110 B, and a side surface  110 C that encloses a space between the first surface  110 A and the second surface  110 B. 
     In an embodiment (not shown), the housing  110  may refer to a structure that forms some of the first surface  110 A, the second surface  110 B, and the side surface  110 C. 
     In another embodiment, the first surface  110 A may be formed by a front surface plate  102  (e.g., a glass plate including various coating layers, or a polymer plate) at least a portion of which is substantially transparent. The second surface  110 B may be formed by a substantially opaque rear surface plate  111 . The rear surface plate  111  may be formed by, for example, coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the above materials. The side surface  110 C may be formed by a side surface bezel structure (or a “frame structure”)  118  that is coupled to the front surface plate  102  and the rear surface plate  111 , and contains metal and/or polymer. 
     In yet another embodiment, the rear surface plate  111  and the side surface bezel structure  118  may be integrally formed and may contain the same material (e.g., a metal material such as aluminum). 
     In the illustrated embodiment, the front surface plate  102  may include two first regions  110 D bent from a region of the first surface  110 A in a direction of the rear surface plate  111  to seamlessly extend. The first regions  110 D may be located at ends of long edges of the front surface plate  102 , respectively. 
     In the illustrated embodiment, the rear surface plate  111  may include two second regions  110 E bent from a region of the second surface  110 B in a direction of the front surface plate  102  to seamlessly extend. The second regions  110 E may be located at ends of long edges of the rear surface plate  111 , respectively. 
     In yet another embodiment, the front surface plate  102  (or the rear surface plate  111 ) may include only one of the first regions  110 D (or of the second regions  110 E). In addition, in yet another embodiment, the front surface plate  102  (or the rear surface plate  111 ) may not include some of the first regions  110 D (or of the second regions  110 E). 
     In yet another embodiment, when viewed from the side surface of the electronic device  101 , the side surface bezel structure  118  may have a first thickness (or width) in a side surface direction (e.g., a short side) in which the first regions  110 D or the second regions  110 E as described above are not included, and may have a second thickness smaller than the first thickness in a side surface direction (e.g., a long side) in which the first regions  110 D or the second regions  110 E are included. 
     In yet another embodiment, the electronic device  101  may include at least one of a display  106 , audio modules  103  and  107  (e.g., an audio module  570  in  FIG.  5   ), a sensor module (not shown) (e.g., a sensor module  576  in  FIG.  5   ), camera modules  105 ,  112 , and  113  (e.g., a camera module  580  in  FIG.  5   ), a key input device  117  (e.g., an input module  550  in  FIG.  5   ), a light emitting device (not shown), and a connector hole  108  (e.g., a connecting terminal  578  in  FIG.  5   ). In yet another embodiment, the electronic device  101  may omit at least one (e.g., the key input device  117  or the light emitting device (not shown)) of the components or additionally include other components. 
     In yet another embodiment, the display  106  may be exposed through a substantial portion of the front surface plate  102 . For example, at least a portion of the display  106  may be exposed through the front surface plate  102  including the first surface  110 A and the first regions  110 D of the side surface  110 C. 
     In yet another embodiment, an edge of the display  106  may be formed to have a shape that is substantially the same as a shape of an adjacent outer periphery of the front surface plate  102 . In yet another embodiment (not shown), a distance between an outer periphery of the display  106  and the outer periphery of the front surface plate  102  may be substantially constant to expand an area to which the display  106  is exposed. 
     In yet another embodiment, a surface (or the front surface plate  102 ) of the housing  110  may include a screen display region defined as the display  106  is visually exposed. For example, the screen display region may include the first surface  110 A and the first regions  110 D of the side surface. 
     In yet another embodiment (not shown), the screen display region  110 A and  110 D may include a sensing region (not shown) for acquiring biometric information of a user. In this connection, “the screen display region  110 A and  110 D includes the sensing region” may be understood to mean that at least a portion of the sensing region may overlap the screen display region  110 A and  110 D. For example, the sensing region (not shown) may mean a region that may display visual information by the display  106  like other regions of the screen display region  110 A and  110 D, and additionally acquire the biometric information (e.g., a fingerprint) of the user. 
     In yet another embodiment, the screen display region  110 A and  110 D of the display  106  may include a region in which the first camera module  105  (e.g., a punch hole camera) may be visually exposed. For example, at least a portion of an edge of the region in which the first camera module  105  is exposed may be surrounded by the screen display region  110 A and  110 D. In yet another embodiment, the first camera module  105  may include a plurality of camera modules (e.g., the camera module  580  in  FIG.  5   ). 
     In yet another embodiment (not shown), the display  106  may be coupled to or disposed adjacent to a touch sensing circuit, a pressure sensor capable of measuring an intensity (a pressure) of a touch, and/or a digitizer that detects a magnetic field-type stylus pen. 
     In yet another embodiment, the audio modules  103 ,  104 , and  107  may include the microphone holes  103  and  104  and the speaker hole  107 . 
     In yet another embodiment, the microphone holes  103  and  104  may include the first microphone hole  103  defined in a region of the side surface  110 C and the microphone hole  104  defined in a region of the second surface  110 B. In the microphone holes  103  and  104 , a microphone for acquiring an external sound may be disposed. The microphone may include a plurality of microphones to sense a direction of the sound. In yet another embodiment, the second microphone hole  104  defined in the region of the second surface  110 B may be disposed adjacent to the camera modules  105 ,  112 , and  113 . For example, the second microphone hole  104  may acquire the sound when the camera modules  105 ,  112 , and  113  are executed, or acquire the sound when another function is executed. 
     In yet another embodiment, the speaker hole  107  may include the external speaker hole  107  and a receiver hole (not shown) for a call. The external speaker hole  107  may be defined in a portion of the side surface  110 C of the electronic device  101 . In yet another embodiment, the external speaker hole  107  may be implemented as one hole with the microphone hole  103 . Although not shown, the receiver hole (not shown) for the call may be defined in another portion of the side surface  110 C. For example, the receiver hole (not shown) for the call may be defined in another portion (e.g., a portion on a +Y-axis side) of the side surface  110 C facing away from the portion (e.g., a portion on a −Y-axis side) of the side surface  110 C in which the external speaker hole  107  is defined. 
     In yet another embodiment, the electronic device  101  may include a speaker in communication with the speaker hole  107 . In yet another embodiment, the speaker may include a piezo speaker in which the speaker hole  107  is omitted. 
     In yet another embodiment, the sensor module (not shown) (e.g., the sensor module  576  in  FIG.  5   ) may generate an electrical signal or a data value corresponding to an internal operating state or an external environmental state of the electronic device  101 . For example, the sensor module may include at least one of a proximity sensor, a HRM sensor, a fingerprint sensor, a gesture sensor, a gyro sensor, a barometric 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, and an illuminance sensor. 
     In yet another embodiment, the camera modules  105 ,  112 , and  113  may include the first camera module  105  (e.g., the punch hole camera) exposed from the first surface  110 A of the electronic device  101 , and the second camera module  112  and/or the flash  113  exposed through the second surface  110 B. 
     In yet another embodiment, the first camera module  105  may be exposed through a portion of the screen display region  110 A and  110 D of the display  106 . For example, the first camera module  105  may be exposed from a region of the screen display region  110 A and  110 D through an opening (not shown) defined in a portion of the display  106 . 
     In yet another embodiment, the second camera module  112  may include a plurality of camera modules (e.g., a dual camera, a triple camera, or a quad camera). However, the second camera module  112  may not be necessarily limited to including the plurality of camera modules, and may include one camera module. 
     Each of the first camera module  105  and the second camera module  112  may include one or a plurality of lenses, an image sensor, and/or an image signal processor. The flash  113  may include, for example, a light emitting diode or a xenon lamp. In yet another embodiment, two or more lenses (an infrared camera, and wide-angle and telephoto lenses) and image sensors may be disposed on one surface of the electronic device  101 . 
     In yet another embodiment, the key input device  117  may be disposed on the side surface  110 C (e.g., in the first regions  110 D and/or the second regions  110 E) of the housing  110 . In yet another embodiment, the electronic device  101  may not include a portion or an entirety of the key input device  117 , and the key input device  117  that is not included may be implemented in another form, like a soft key, on the display  106 . In yet another embodiment, the key input device may include a sensor module (not shown) that forms the sensing region (not shown) included in the screen display region  110 A and  110 D. 
     In yet another embodiment, the connector hole  108  may receive a connector. The connector hole  108  may be disposed on the side surface  110 C of the housing  110 . For example, the connector hole  108  may be disposed on the side surface  110 C to be adjacent to at least a portion of the audio module (e.g., the microphone hole  103  and the speaker hole  107 ). In yet another embodiment, the electronic device  101  may include the first connector hole  108  capable of accommodating a connector (e.g., a universal serial bus (USB) connector) for transmitting/receiving power and/or data with an external device and/or a second connector hole (not shown) capable of accommodating a connector (e.g., an earphone jack) for transmitting/receiving an audio signal with the external device. 
     In yet another embodiment, the electronic device  101  may include the light emitting device (not shown). For example, the light emitting device (not shown) may be disposed on the first surface  110 A of the housing  110 . The light emitting device (not shown) may provide state information of the electronic device  101  in a form of light. In yet another embodiment, the light emitting device (not shown) may provide a light source that is in association with an operation of the first camera module  105 . For example, the light emitting device (not shown) may include a light emitting diode (LED), an infrared (IR) LED, and/or a xenon lamp. 
     In yet another embodiment, at least a portion of the side surface bezel structure  118  may function as an antenna electrically connected to the communication module. According to an embodiment, the side surface bezel structure  118  may include a conductive part  202  formed of a metal material and a division part  201  formed of a nonmetal material (e.g., a polymer). According to yet another embodiment, at least a portion of the conductive part  202  may be a radiator, for example, an antenna that is electrically connected to the communication module and radiates an RF signal output from the communication module. 
       FIG.  3    is an exploded perspective view of an electronic device according to an embodiment of the disclosure. 
     Referring to  FIG.  3   , the electronic device  101  may include a front surface plate  120  (e.g., the front surface plate  102  in  FIG.  1   ), a display  130  (e.g., the display  106  in  FIG.  1   ), a bracket  140 , a battery  170 , a printed circuit board (PCB)  150 , a radio frequency printed circuit board (RFPCB)  100 , a support member  160  (e.g., a rear casing), and a rear surface plate  180  (e.g., the rear surface plate  111  in  FIG.  2   ). 
     In an embodiment, the electronic device  101  may omit at least one (e.g., the support member  160 ) of the components or additionally include other components. At least one of the components of the electronic device  101  may be the same as or similar to at least one of the components of the electronic device  101  in  FIGS.  1  and  2   . Hereinafter, redundant descriptions will be omitted. 
     In yet another embodiment, at least some of the front surface plate  120 , the rear surface plate  180 , and the bracket  140  (e.g., a frame structure  141 ) may form a housing (e.g., the housing  110  in  FIGS.  1  and  2   ). 
     In yet another embodiment, the bracket  140  may include the frame structure  141  that forms a surface of the electronic device  101  (e.g., a portion of the side surface  110 C in  FIG.  1   ) and a plate structure  142  that extends inwardly of the electronic device  101  from the frame structure  141 . 
     The plate structure  142  may be located inside the electronic device  101 , connected to the frame structure  141 , or integrally formed with the frame structure  141 . The plate structure  142  may be made of, for example, a metallic material and/or a non-metallic (e.g., polymer) material. The display  130  may be coupled to one surface of the plate structure  142  and the PCB  150  may be coupled to the other surface of the plate structure  142 . A processor, a memory, and/or an interface may be mounted on the PCB  150 . The processor may include, for example, one or more of a central processing unit, an application processor, a graphics processing device, an image signal processor, a sensor hub processor, and a communication processor. 
     The memory may include, for example, a volatile memory or a non-volatile memory. 
     The interface may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, and/or an audio interface. The interface may, for example, electrically or physically connect the electronic device  101  to the external device, and may include a USB connector, an SD card/multimedia card (MMC) connector, or an audio connector. 
     In yet another embodiment, the battery  170  may supply power to at least one of the components of the electronic device  101 . For example, the battery  170  may include a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell. In yet another embodiment, at least a portion of the battery  170  may be disposed substantially coplanar with the PCB  150 . In yet another embodiment, the battery  170  may be integrally disposed inside the electronic device  101  or may be disposed detachably from the electronic device  101 . 
     In yet another embodiment, the first camera module  105  may be disposed on the plate structure  142  of the bracket  140  such that the lens thereof is exposed from a region of the front surface plate  120  (e.g., the front surface  110 A in  FIG.  1   ) of the electronic device  101 . 
     In yet another embodiment, the first camera module  105  may be disposed such that an optical axis of the lens thereof is at least partially aligned with a hole or recess  137  defined in the display  130 . For example, the region from which the lens is exposed may be formed on the front surface plate  120 . For example, the first camera module  105  may include the punch hole camera having at least a portion disposed inside the hole or recess  137  defined in a rear surface of the display  130 . 
     In yet another embodiment, the second camera module  112  may be disposed on the PCB  150  such that the lens thereof is exposed from a camera region  184  of the rear surface plate  180  (e.g., the rear surface  110 B in  FIG.  2   ) of the electronic device  101 . 
     In yet another embodiment, the camera region  184  may be formed on a surface (e.g., the rear surface  110 B in  FIG.  2   ) of the rear surface plate  180 . In yet another embodiment, the camera region  184  may be formed to be at least partially transparent such that external light is incident to the lens of the second camera module  112 . In yet another embodiment, at least a portion of the camera region  184  may protrude from the surface of the rear surface plate  180  with a predetermined height. However, the disclosure may not be necessarily limited thereto, and the camera region  184  may be substantially coplanar with the surface of the rear surface plate  180 . 
     The electronic device  101  according to various embodiments may include an electronic device, such as a bar type, a foldable type, a rollable type, a sliding type, a wearable type, a tablet personal computer (PC), and/or a notebook PC. The electronic device  101  according to various embodiments of the disclosure is not limited to the above-described example, and may include other various electronic devices. 
       FIG.  4    is an exploded perspective view illustrating a joining structure between a rear plate and a housing of an electronic device according to an embodiment of the disclosure. 
       FIG.  5    is a cross-sectional view of an electronic device, taken along line A-A′ of  FIG.  4    according to an embodiment of the disclosure. 
     Referring to  FIGS.  4  and  5   , an electronic device  401  (e.g., the electronic device  101  of  FIGS.  1  to  3   ) disclosed in the disclosure may include a housing  440  (e.g., the bracket  140  of  FIG.  3   ) including a side member  441  (e.g., the frame structure  141  of  FIG.  3   ), a rear plate (or a first plate)  480  (e.g., the rear plate  180  of  FIG.  3   ), a front plate (or a second plate)  470  (e.g., the front surface plate  120  of  FIG.  3   ), and an adhesion member  400 . 
     At least a portion of the rear plate  480  may be a curved surface. The rear plate  480  may include a flat area  481  that faces a first direction (e.g., direction D 1 ), and a curved area  482  that extends from the flat area  481  to form a curved surface. 
     The flat area  481  may be a central area of the rear plate  480 , and the curved area  482  may be formed at an edge area of the rear plate  480  with respect to the flat area  481 . The curved area  482  may have a curved structure that is curved seamlessly toward a second direction (e.g., direction D 2 ) that faces a display  430  (e.g., the display  130  of  FIG.  3   ). According to an embodiment, the curved area  482  may have a closed loop shape that surrounds the flat area  481 . For example, four curved areas  482  may be formed when the flat area  482  has a rectangular shape. According to another embodiment, the plurality of curved areas  482  may extend from a partial area of the flat area  481  to face each other. The curved areas  482  may not be formed at opposite ends of the rear plate  480 , which are located along a widthwise direction (e.g., the X direction of  FIG.  3   ) thereof, and may be formed at opposite ends thereof, which are located along a lengthwise direction (e.g., the Y direction of  FIG.  3   ). Some of the curved areas  482  may be formed by bending a left area of the rear plate  480  with respect to the flat area  481 . The remaining ones of the curved area  482  may be formed by bending a right area of the rear plate  480  with respect to the flat area  481 . 
     The rear plate  480  may have a plurality of layers. For example, one surface (e.g., a surface that faces direction D 1 ) of the rear plate, which faces an outside of the electronic device  401 , for example, may be formed of coated or colored glass, ceramic, a polymer, a metal (e.g., aluminum, stainless steel, or magnesium), or a combination of at least two thereof. An opposite surface (e.g., a surface that faces direction D 2 ) of the rear plate  480 , which faces an inside of the electronic device  401 , may have various printed layers. 
     The front plate  470  may face the second direction (e.g., direction D 2 ) that is an opposite direction to the first direction (e.g., direction DD. The electronic device  401  may define an interior space between the front plate  470  and the rear plate  480 . At least a portion of the front plate  470  may be a curved surface. A battery  460  and the display  430  may be accommodated in the interior space between the front plate  470  and the rear plate  480 . 
     The housing  440  may be formed of plastic, a metal (e.g., aluminum, stainless steel, or magnesium), a combination of plastic or glass fiber, or a combination of at least two of the materials. The plastic, for example, may be formed of polycarbonate (PC), polyamide (PA), polybutylene terephthalate (PBT), or a combination of at least two of the materials. 
     The side member  441  and the rear plate  480  of the housing  440  may be coupled to each other by the adhesion member  400 . The adhesion member  400  may include a first adhesion member  410  and a second adhesion member  420 . The side member  441  and the rear plate  480  of the housing  440  may be coupled to each other by at least any one of the first adhesion member  410  and the second adhesion member  420 . 
     A plurality of first adhesion members  410  may be disposed in the side member  441  of the housing  440 . Each of the plurality of first adhesion members  410  may be formed in a dot form to be spaced apart from an adjacent first adhesion member  410 . The plurality of first adhesion members  410  may be filled in adhesion tunnels  500  formed in the side member  441 . The plurality of adhesion tunnels  500  may correspond to the plurality of first adhesion members  410  in one-to-one correspondence. 
     When the rear plate  480  is viewed from a top, the second adhesion members  420  may be formed along a periphery of at least any one of the rear plate  480  and the side member  441 . The second adhesion members  420  may be formed in a closed curve form. The second adhesion member  420  may be attached to the side member  441 , and may couple the rear plate  480  and the side member  441  by pressing the side member  441  and the rear plate  480 . 
       FIGS.  6 A and  6 B  are cross-sectional views illustrating various embodiments, in which area {circle around ( 1 )} of  FIG.  5    is enlarged according to various embodiments of the disclosure. 
     Referring to  FIGS.  6 A and  6 B , an electronic device (e.g., the electronic device  401  of  FIG.  4   ) disclosed in the disclosure may include the side member  441  including the plurality of adhesion tunnels  500 , the first adhesion member  410 , and the second adhesion member  420 . 
     The side member  441  may include the plurality of adhesion tunnels  500 . Each of the plurality of adhesion tunnels  500  may be formed to pass through the side member  441  from a first outer surface  451  to a second outer surface  452  of the side member  441 . The plurality of adhesion tunnels  500  may include a first hole area  510  (or an injection hole), a second hole area  520  (or a discharge hole), and a connection area  530 . 
     The first hole area  510  may be opened toward the flat area  481  of the rear plate  480 . The first hole area  510  may be formed to extend from the first direction D 1  that is a rearward direction to the second direction D 2  that is a forward direction. The first hole area  510  may be formed to overlap the flat area  481  of the rear plate  480  and to pass through the first outer surface  451 . The first hole area  510  may be formed to pass through a portion of the side member  441  from the first outer surface  451  of the side member  441 , which faces the flat area  481  of the rear plate  480 , in the second direction D 2 . 
     The second hole area  520  may be opened toward the curved area  482  of the rear plate  480 . The second hole area  520  may be formed to extend from any one of a third direction D 3  and a fourth direction D 4 , which are substantially perpendicular to or crosses the first direction D 1 , to the remaining one of the third direction D 3  and the fourth direction D 4 . The second hole area  520  may be formed to overlap the curved area  482  of the rear plate  480  and to pass through the second outer surface  452 . The second hole area  520  may be formed to pass through a portion of the side member  441  from the second outer surface  452  of the side member  441 , which faces the curved area  482  of the rear plate  480 , in the third direction D 3  or the fourth direction D 4 . 
     The connection area  530  may be disposed in a cross area of the first hole area  510  and the second hole area  520 . The connection area  530  may spatially connect the first hole area  510  and the second hole area  520 . Because the first hole area  510  and the second hole area  520  are connected to each other through the connection area  530 , the adhesion tunnel  500  may be formed in an “L”-shaped tunnel structure that passes through a portion of the side member  441 . 
     The first adhesion member  410  is filled in the adhesion tunnel  500 , and thus may have a shape corresponding to the adhesion tunnel  500 . For example, when the adhesion tunnel  500  has an “L” shape, at least a portion of the first adhesion member  410  may have an “L” shape along a shape of the adhesion tunnel  500 . The first adhesion member  410  may include a first adhesion area  411  filled in the first hole area  510 , a second adhesion area  412  filled in the second hole area  520 , and a third adhesion area  413  filled in the connection area  530 . 
     The second adhesion area  412  of the first adhesion member  410  may extend toward the curved area  482  of the rear plate  480  rather than toward the second outer surface  452  of the side member  441 . The second adhesion area  412  of the first adhesion member  410  may be disposed between the curved area  482  of the rear plate  480  and the side member  441 . The second adhesion area  412  of the first adhesion member  410  may couple the curved area  482  of the rear plate  480  and the side member  441 . The first adhesion member  410  may contact the curved area  482  of the rear plate  480 . A portion of the first adhesion member  410 , which contacts the curved area  482  of the rear plate  480 , may be formed in a curved form along the curved area  482 . 
     The second adhesion member  420  may be disposed on the first adhesion member  410  filled in the first hole area  510 . As an example, the second adhesion member  420 , as illustrated in  FIG.  6 A , may be formed on the first adhesion area  411  of the first adhesion member  410  to have a width that is larger than that of the first adhesion area  411 . The second adhesion member  420  may contact the flat area  481  of the rear plate  480 . At least a portion of the second adhesion member  420 , which contacts the flat area  481  of the rear plate  480 , may be formed in a flat form along the flat area  481 . As another example, the second adhesion member  420 , as illustrated in  FIG.  6 B , may be formed on the first adhesion area  411  of the first adhesion member  410  toward the second adhesion area  412 . The second adhesion member  420  may be formed on the second outer surface  452  of the side member  441 , which is disposed between the first hole area  510  and the second hole area  520 . The second adhesion member  420  may overlap the first adhesion area  411  and the second adhesion area  412  of the first adhesion member  410 . The second adhesion member  420  may contact the first adhesion area  411  and the second adhesion area  412  of the first adhesion member  410 . 
     According to an embodiment, the second adhesion member  420  may have an integral structure with no interface with the first adhesion member  410 . According to another embodiment, the second adhesion member  420  may form an interface with the first adhesion member  410 . 
     According to yet another embodiment, a coloring material or a fluorescent material may be added to at least any one of the first adhesion member  410  and the second adhesion member  420 . For example, because the coloring material or the fluorescent material is added to the second adhesion member  420 , an application defect or an adhesion defect of the second adhesion member  420  may be identified by naked eyes. 
     According to yet another embodiment, the second adhesion member  420  may be formed of a material that is the same as or dissimilar to the first adhesion member  410 . At least any one of the first adhesion member  410  and the second adhesion member  420  may be formed of a liquid type adhesive. For example, the liquid type adhesive may be formed of a polyurethane (PUR) based material, an acryl based material, or a synthetic resin based material, or may be formed of a combination (e.g., a PUR+acryl based material or a PUR+synthetic resin based material) thereof. The PUR based material is a reactive adhesive that causes a reaction with a moisture, and a curing process may be performed in a space of designated temperature and humidity. The synthetic rubber based material is a non-reactive adhesive, and a curing process may be performed in a room-temperature space. 
     According to yet another embodiment, at least any one of the first adhesion member  410  and the second adhesion member  420  may be a pressure sensitive adhesive (PSHA). For example, at least any one of the first adhesion member  410  and the second adhesion member  420  may be pressure sensitive hot-melt adhesive (PSHA). At least any one of the first adhesion member  410  and the second adhesion member  420  may be a thermoplastic adhesive that is adhered through cool solidification after being heated and applied in a melted state. Because at least any one of the first adhesion member  410  and the second adhesion member  420  shows a bonding/adhesion performance even only with a cooling/solidification process, a separate additional process may be unnecessary. A softening point of at least any one of the first adhesion member  410  and the second adhesion member  420  may be 150 degrees (° C.) to 200 degrees (° C.) and they have a high heat-resistance maintaining force and a high viscosity, and thus stable application may be possible. 
     According to yet another embodiment, a main substance of at least any one of the first adhesion member  410  and the second adhesion member  420  may be a synthetic rubber based material or a plasticizer. The synthetic rubber based material is a thermoplastic rubber, of which a main substrate is a styrene block copolymer, and may be an adhesive that shows an adhesion performance by using a natural resin and a petroleum resin. The synthetic rubber based material is a solids-not-fat, and may not generate a toxic volatile organic compound (VOC), such as toluene, xylene, ethyl benzene, or styrene, including isocyanate. A mineral oil may be used for the plasticizer. 
     According to yet another embodiment, at least any one of the first adhesion member  410  and the second adhesion member  420  may formed as a pressure-sensitive adhesive, manufacturing costs of which are lower than that of a double-sided tape type adhesive, and thus costs may be saved. An embodiment including at least one of the first adhesion member  410  and the second adhesion member  420  may maintain a high adhesion force as compared with a comparative example including the double-sided tape type adhesive as in Table 1. 
     
       
         
           
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 Adhesion force test environment 
                 Comparative example 
                 Embodiment 
               
               
                   
               
             
            
               
                 Room temperature 
                 10 kgf 
                 15 to 17 kgf 
               
               
                 After high temperature/high 
                   
                 12 to 15 kgf 
               
               
                 humidity 
               
               
                 After thermal impact 
               
               
                 After low temperature 
               
               
                   
               
            
           
         
       
     
     According to yet another embodiment, after at least any one adhered object of the rear plate  480  and the side member  441  and the adhesion member  400  formed of a pressure-sensitive adhesive are disassembled, residuals of the adhesion member  400  may not be generated on the adhered object. The first adhesion member  410  and the second adhesion member  420  may be easily disassembled from at least any one of the rear plate  480  and the side member  441 . 
       FIGS.  7 A,  7 B,  7 C, and  7 D  are views illustrating an adhesion tunnel of an electronic device according to various embodiments of the disclosure. 
     Referring to  FIGS.  7 A to  7 D , the adhesion tunnels  500  may include the first hole area  510 , the second hole area  520 , and the connection area  530 . 
     The first hole area  510  may be formed to face an interior of the side member  441  from the first outer surface  451  of the side member  441 . The first hole area  510  may be formed such that at least any one of a first transverse length W 11  and a first longitudinal length W 12  becomes wider as it becomes farther away from the connection area  530 . The first transverse length W 11  of the first hole area  510  may be equal to or larger than the first longitudinal length W 12  of the first hole area  510 . For example, the first transverse length W 11  of the first hole area  510  may be 1.5 mm to 2.0 mm, and the first longitudinal length W 12  of the first hole area  510  may be 1.0 mm to 1.5 mm. 
     The second hole area  520  may be formed to face an interior of the side member  441  from the second outer surface  452  of the side member  441 . The second hole area  520  may be formed such that at least any one of a second transverse length W 21  and a second longitudinal length W 22  becomes wider as it becomes farther away from the connection area  530 . The second transverse length W 21  of the second hole area  520  may be equal to or larger than the second longitudinal length W 22  of the second hole area  520 . The second transverse length W 21  of the second hole area  520  may be equal to or different from the first transverse length W 11  of the first hole area  510 . The second longitudinal length W 22  of the second hole area  520  may be equal to or different from the first longitudinal length W 12 . For example, the second transverse length W 21  of the second hole area  520  may be 1.5 mm to 2.0 mm, and the second longitudinal length W 22  of the second hole area  520  may be 1.0 mm to 1.5 mm. 
     The first hole area  510  may be formed to be surrounded by a first inner surface  701 , a second inner surface  702 , a third inner surface  703 , and a fourth inner surface  704 . The first inner surface  701  may face the second inner surface  702  while the first hole area  510  being interposed therebetween. The first inner surface  701  may be formed to face an outside of the electronic device (e.g., the electronic device  401  of  FIG.  4   ). The second inner surface  702  may be formed to face an inside of the electronic device. The third inner surface  703  may be connected to one side of the first inner surface  701  and one side of the second inner surface  702  therebetween. The fourth inner surface  704  may face the third inner surface  703  while the first hole area  510  being interposed therebetween. The fourth inner surface  704  may be connected to an opposite side of the first inner surface  701  and an opposite side of the second inner surface  702  therebetween. 
     The second hole area  520  may be formed to be surrounded by a fifth inner surface  705 , a sixth inner surface  706 , a seventh inner surface  707 , and an eighth inner surface  708 . The fifth inner surface  705  may face the sixth inner surface  706  while the second hole area  520  being interposed therebetween. The fifth inner surface  705  may be formed to face an outside of the electronic device. The sixth inner surface  706  may be formed to face an inside of the electronic device. The fifth inner surface  705  may be included in an extension area  442  of the side member  441 , which extends toward the outside of the electronic device rather than toward the sixth inner surface  706  by a specific width WA. The width WA of the extension area  442  may be determined according to a curvature of the curved area  482  of the rear plate  480 . The width WA of the extension area  442  may become smaller as the curvature of the curved area  482  becomes larger. The seventh inner surface  707  may be connected to one side of the fifth inner surface  705  and one side of the sixth inner surface  706  therebetween. The eighth inner surface  708  may face the seventh inner surface  707  while the second hole area  520  being interposed therebetween. The eighth inner surface  708  may be connected to an opposite side of the fifth inner surface  705  and an opposite side of the sixth inner surface  706  therebetween. 
     A width of the first hole area  510  may become larger as it goes farther away from the connection area  530 . At least any one of the first inner surface  701 , the second inner surface  702 , the third inner surface  703 , and the fourth inner surface  704  defined by the first hole area  510  may be formed to be inclined with respect to a first imaginary plane  751  and a second imaginary plane  752  that are substantially parallel to a center line that extends in a depth direction (e.g., D 2 ) of the first hole area  510 . Gradient angles defined by at least one of the first inner surface  701 , the second inner surface  702 , the third inner surface  703 , and the fourth inner surface  704 , and the imaginary planes  751  and  752  may be 0.5 to 1 degrees. 
     According to an embodiment, as illustrated in  FIG.  7 D , the first inner surface  701  may be formed to be inclined so as to become farther away from the second inner surface  702  as it becomes closer to the first outer surface  451 . A first gradient angle θ 1  defined by the first imaginary plane  751  located between the first inner surface  701  and the second inner surface  702 , and the first inner surface  701  may be 0.5 to 1 degrees. The second inner surface  702  may be formed to be inclined so as to become farther away from the first inner surface  701  as it becomes closer to the first outer surface  451 . A second gradient angle θ 2  defined by the second imaginary plane  752  that is substantially parallel to the first imaginary plane  751 , and the second inner surface  702  may be 0.5 to 1 degrees. The first gradient angle θ 1  and the second gradient angle θ 2  may be the same or different. 
     A width of the second hole area  520  may become larger as it goes farther away from the connection area  530 . At least any one of the fifth inner surface  705 , the sixth inner surface  706 , the seventh inner surface  707 , and the eighth inner surface  708  defined by the second hole area  520  may be formed to be inclined with respect to a third imaginary plane  753  and a fourth imaginary plane  754  that are substantially parallel to a center line that extends in a depth direction (e.g., D 2 ) of the second hole area  520 . Gradient angles defined by at least one of the fifth inner surface  705 , the sixth inner surface  706 , the seventh inner surface  707 , and the eighth inner surface  708 , and the imaginary planes  753  and  754  may be 0.5 to 1 degrees. 
     According to another embodiment, as illustrated in  FIG.  7 D , the fifth inner surface  705  may be formed to be inclined so as to become farther away from the sixth inner surface  706  as it becomes closer to the second outer surface  452 . A third gradient angle θ 3  defined by the third imaginary plane  753  that is substantially parallel to the first imaginary plane  751 , and the fifth inner surface  705  may be 0.5 to 1 degrees. The sixth inner surface  706  may be formed to be inclined so as to become farther away from the fifth inner surface  705  as it becomes closer to the second outer surface  452 . A fourth gradient angle θ 4  defined by the fourth imaginary plane  754  that is substantially parallel to the second imaginary plane  752 , and the sixth inner surface  706  may be 0.5 to 1 degrees. The third gradient angle θ 3  and the fourth gradient angle θ 4  may be the same or different. 
     The connection area  530  may define a plurality of inner corner surfaces  711  and  712  in the adhesion tunnels  500 . The connection area  530  may include the first inner corner surface  711  and the second inner corner surface  712 , which face each other. The first inner corner surface  711  may face the second inner corner surface  712  in a direction that faces the outside of the electronic device. The first inner corner surface  711  may connect the first inner surface  701  and the fifth inner surface  705 , which face the outside of the electronic device. The second inner corner surface  712  may face the first inner corner surface  711  in a direction that faces the inside of the electronic device. The second inner corner surface  712  may connect the second inner surface  702  and the sixth inner surface  706 , which face the inside of the electronic device. 
     Any one of the first inner corner surface  711  and the second inner corner surface  712  may be curved in a direction that defines an obtuse angle. A remaining one of the first inner corner surface  711  and the second inner corner surface  712  may be curved in a direction that defines an acute angle, a right angle, or an obtuse. The first inner corner surface  711  may be curved in a direction that defines an obtuse angle so as not to be an obstruction to a flow direction (e.g., discharged from the first hole area to the second hole area) of the liquid type adhesive that constitutes the first adhesion member  410 . For example, the first inner corner surface  711  may be curved in a direction that defines an obtuse angle to be formed in a curved form, and the second inner corner surface  712  may be curved in a direction that defines a right angle. As another example, the first inner corner surface  711  and the second inner corner surface  712 , as illustrated in  FIG.  7 D , may be curved in a direction that defines an obtuse angle to be formed in a curved form. 
     A spacing distance “d” between the first inner corner surface  711  and the second inner corner surface  712  may be formed to be smaller than at least any one of the first transverse length W 11 , the second transverse length W 21 , the first longitudinal length W 12 , and the second longitudinal length W 22 . The spacing distance “d” between the first inner corner surface  711  and the second inner corner surface  712  may be formed to have a size that is large not to obstruct a flow direction (e.g., a flow from the first hole area  510  to the second hole area  520 ) of the liquid type adhesive that constitutes the first adhesion member  410 . The spacing distance “d” between an apex of the first inner corner surface  711  and an apex of the second inner corner surface  712  may be a minimum of 0.5 mm or more. For example, the spacing distance “d” between the apex of the first inner corner surface  711  and the apex of the second inner corner surface  712  may be 0.9 mm to 1.1 mm. 
     According to yet another embodiment, a center of a radius of curvature of the first inner corner surface  711  and a center of a radius of curvature of the second inner corner surface  712  may be located at the same location. A radius R 1  of curvature of the first inner corner surface  711  may be larger than a radius of curvature of the second inner corner surface  712 . The radius of curvature of the first inner corner surface  711  may be larger than the radius R 2  of curvature of at least any one of the first hole area  510  and the second hole area  520 . For example, the first inner corner surface  711  may have the radius R 1  of curvature of 0.9 to 1.1. 
     A minimum thickness “T” of the side member  441  that surrounds the adhesion tunnel  500  may be designed in consideration of a strength that is high enough not to be damaged when the side member  441  contacts the first adhesion member  410 , the second adhesion member  420 , and the rear plate  480 . The minimum thickness “T” of the side member  441  may correspond to a distance between a first apex P 1  between the second inner surface  702  and the second outer surface  452 , and a second apex P 2  between the sixth inner surface  706  and the second outer surface  452 . For example, the thickness “T” of the side member  441  may be a minimum of 0.6 mm to 0.8 mm. 
       FIGS.  8 A and  8 B  are views illustrating a first adhesion member and a second adhesion member of an electronic device according to various embodiments of the disclosure. 
     Referring to  FIGS.  8 A and  8 B , when the first adhesion member  410  filled in the side member  441  is viewed from a top, the first adhesion member  410  may be implemented in a circular shape, an elliptical shape, a polygonal shape, or a polygonal shape having rounded corners. The first adhesion member  410  may be implemented in various shapes and structures, and a shape, a structure, and the number of the first adhesion members  410  are neither restricted nor limited in the disclosure. 
     The plurality of first adhesion members  410  may be formed in the side member  441  of the housing  440 . For example, one first adhesion member  410 , as illustrated in  FIG.  8 A , may be formed in each of a right area  4411 , a left area  4412 , an upper area  4413 , and a lower area  4414  of the side member  441 . 
     Each of the plurality of first adhesion members  410  disposed in the right area  4411  of the side member  441  may be disposed to be spaced apart from an adjacent first adhesion member  410  by a specific first gap g 1 . Each of the plurality of first adhesion members  410  disposed in the left area  4412  of the side member  441  may be disposed to be spaced apart from an adjacent first adhesion member  410  by a specific second gap g 2 . Each of the plurality of first adhesion members  410  disposed in the upper area  4413  of the side member  441  may be disposed to be spaced apart from an adjacent first adhesion member  410  by a specific third gap g 3 . Each of the plurality of first adhesion members  410  disposed in the lower area  4414  of the side member  441  may be disposed to be spaced apart from an adjacent first adhesion member  410  by a specific fourth gap g 4 . The first gap g 1 , the second gap g 2 , the third gap g 3 , and the fourth gap g 4  may have the same or different sizes. At least any one of the first gap g 1 , the second gap g 2 , the third gap g 3 , and the fourth gap g 4  may be maintained at a minimum of 10 mm or more. For example, at least any one of the first gap g 1 , the second gap g 2 , the third gap g 3 , and the fourth gap g 4  may be maintained at 10 mm to 15 mm. 
     A corner area  801  of the side member  441  may be thicker than the remaining areas of the side member  441 , except for the corner area  801 , and thus it may be relatively difficult to form the adhesion tunnels  500 . The adhesion tunnels  500  may be formed in the remaining areas of the side member  441 , except for the corner area  801 . The first adhesion member  410  may be filled in the adhesion tunnels  500  formed in the remaining areas of the side member  441 , except for the corner area  801 . 
     The second adhesion member  420  may be formed on at least any one of the right area  4411 , the left area  4412 , the upper area  4413 , and the lower area  4414  of the side member  441 . The second adhesion member  420  may be formed on the side member  441  filled with the first adhesion member  410  along a circumference of the side member  441 . 
       FIG.  9    is a perspective view illustrating an electronic device including a partition wall member according to an embodiment of the disclosure. 
       FIGS.  10 A and  10 B  are cross-sectional views illustrating various embodiments of a partition wall member illustrated in  FIG.  9    according to various embodiments of the disclosure. 
       FIGS.  9 ,  10 A, and  10 B  may illustrate an electronic device (e.g., the electronic device  401  of  FIG.  4   ) including a partition wall member  910  disclosed in the disclosure. 
     The partition wall member  910  may be disposed on an outside of the second hole area  520 . The partition wall member  910  may be disposed on the extension area  442  of the side member  441 . At least a portion of the partition wall member  910  may not overlap the sixth inner surface  706  of the side member  441 . 
     The partition wall member  910  may be disposed on the fifth inner surface  705  defined by the second hole area  520 , and may protrude toward the sixth inner surface  706 . A size of the partition wall member  910  may be the same as or smaller than the second transverse length W 21  of the second hole area  520 . A height “H” of the partition wall member  910  may be lower than the second longitudinal length W 22  of the second hole area  520 . 
     The partition wall member  910 , as illustrated in  FIG.  10 A , may have a semicircular shape, or as illustrated in  FIG.  10 B , may have a polygonal shape. The partition wall member  910  may be formed of a material that is the same as or different from that of the side member  441 . For example, the partition wall member  910  may be integrally formed with the side member  441  with the same material as that of the side member  441 . 
     The partition wall member  910  may restrict flows of the liquid type adhesive that constitutes the first adhesion member  410  before the rear plate  480  is attached to the side member  441 . Before the rear plate  480  is attached to the side member  441 , an appropriate amount or more of the first adhesion member  410  may be prevented from overflowing to an outside of the second hole area  520 . Because the first adhesion member  410  may be sufficiently filled in the adhesion tunnels  500  due to the partition wall member  910 , an adhesion force between the rear plate  480  and the side member  441  using the first adhesion member  410  may be enhanced. A specific amount of the first adhesion member  410  may be discharged to an outside of the second hole area  520  by a pressing force when the rear plate  480  is pressed by the side member  441 , and the first adhesion member  410  may contact the curved area  482  of the rear plate  480 . 
       FIG.  11    is a view illustrating an electronic device including a side member having a convexo-concave surface according to an embodiment of the disclosure. 
     Referring to  FIG.  11   , the side member  441  disclosed in the disclosure may define at least any one of the plurality of inner surfaces  701 ,  702 ,  705 , and  706  defined by the adhesion tunnels  500  as a convexo-concave surface in a convexo-concave form. Although  FIG.  11    illustrates that the first inner surface  701 , the second inner surface  702 , the fifth inner surface  705 , and the sixth inner surface  706  are convexo-concave surfaces, but the disclosure is not limited thereto. That is, at least any one of the plurality of surfaces defined in the interiors of the adhesion tunnels  500  may be a convexo-concave surface. For example, the first inner surface  701 , the second inner surface  702 , the third inner surface (e.g., the third inner surface  703  of  FIG.  7 A ), the fourth inner surface (e.g., the fourth inner surface  704  of  FIG.  7 A ), the fifth inner surface  705 , the sixth inner surface  706 , the seventh inner surface (e.g., the seventh inner surface  707  of  FIG.  7 A ), the eighth inner surface (e.g., the eighth inner surface  708  of  FIG.  7 A ), the first inner corner surface (e.g., the first inner corner surface  711  of  FIG.  7 D ), and the second inner corner surface (e.g., the second inner corner surface  712  of  FIG.  7 D ) may be convexo-concave surfaces. As another example, the fifth inner surface  705 , the sixth inner surface  706 , the seventh inner surface  707 , the eighth inner surface  708 , the first inner corner surface  711 , and the second inner corner surface  712  may be convexo-concave surfaces. As another example, the fifth inner surface  705 , the sixth inner surface  706 , the seventh inner surface  707 , and the eighth inner surface  708  may be convexo-concave surfaces. 
     The convexo-concave surface may include concave areas  1101  and protruding areas  1102 . The concave areas  1101  may be disposed between the protruding areas  1102 . The protruding areas  1102  may restrict flows of the liquid type adhesive that constitutes the first adhesion member  410  when the first adhesion member  410  is formed. Due to the protruding areas  1102 , an appropriate amount or more of the first adhesion member  410  may be prevented from overflowing to an outside of the second hole area  520 . Because the first adhesion member  410  may be sufficiently filled in the adhesion tunnels  500  due to the protruding areas  1102 , an adhesion force between the rear plate  480  and the side member  441  using the first adhesion member  410  may be enhanced. 
     According to an embodiment, the protruding areas  1102  may be formed of a material that is the same as or different from that of the side member  441 . For example, the protruding areas  1102  may be integrally formed with the side member  441  with the same material as that of the side member  441 . According to another embodiment, the convexo-concave surface including the protruding areas  1102  may be a corroded surface. 
       FIGS.  12 A,  12 B,  12 C,  12 D, and  12 E  are views illustrating a method for manufacturing an electronic device according to various embodiments of the disclosure. 
     Referring to  FIGS.  12 A to  12 E , the adhesion tunnels  500  may include the first hole area  510 , the second hole area  520 , and the connection area  530 . The first hole area  510  may be an injection hole, through which a liquid type adhesive  1212  that forms the first adhesion member  410  is injected. The second hole area  520  may be a discharge hole, through which the liquid type bond that forms the first adhesion member  410  is discharged toward the curved area  482  of the rear plate  480 . The connection area  530  may be a direction switching area for discharging the liquid type adhesive in a discharge direction that is different from the injection direction of the liquid type adhesive. 
     In operation  1201  illustrated in  FIG.  12 A , a nozzle  1211  of a liquid type application equipment may be aligned with the first hole area  510  of the adhesion tunnel  500 . The first liquid type adhesive  1212  may be discharged to the first hole area  510  through the nozzle  1211 . The first liquid type adhesive  1212  may be formed of a polyurethane (PUR) based material, an acryl based material, or a synthetic resin based material, or may be formed of a combination (e.g., a PUR+acryl based material or a PUR+synthetic resin based material) thereof. 
     In operation  1202  illustrated in  FIG.  12 B , a flow direction of the first liquid type adhesive  1212  may be switched to the second hole area  520  while the first liquid type adhesive  1212  passes through the connection area  530 . 
     In operation  1203  illustrated in  FIG.  12 C , because the first liquid type adhesive  1212  is filled even in the second hole area  520 , the first adhesion member  410  including the first liquid type adhesive  1212  may be filled in the adhesion tunnel  500 . The first adhesion member  410  filled even in the second hole area  520 , and the first outer surface  451  disposed around the first hole area  510  may be stepped from each other. 
     In operation  1204  illustrated in  FIG.  12 D , because the second liquid type adhesive is discharged through the nozzle (e.g., the nozzle of  FIG.  12 A ) of the liquid type adhesive application equipment, the second adhesion member  420  may be formed. The second adhesion member  420  may be formed on the first adhesion member  410  along the side member  441 . The second adhesion member  420  may fill a stepped area between the first adhesion member  410  and the first outer surface  451 . The second adhesion member  420  may protrude further than the first outer surface  451 . The second liquid type adhesive that forms the second adhesion member  420  may be formed of a material that is the same as or different from that of the first liquid type adhesive  1212 . 
     In operation  1205  illustrated in  FIG.  12 E , the rear plate  480  may be coupled to the side member  441  through the first adhesion member  410  and the second adhesion member  420 . The curved area  482  of the rear plate  480  may be coupled to the side member  441  through the first adhesion member  410 , and the flat area  481  of the rear plate  480  may be coupled to the side member  441  through the second adhesion member  420 . A specific amount of the first adhesion member  410  may be discharged to an outside of the second hole area  520  by a pressing force when the rear plate  480  is pressed by the side member  441 , and the first adhesion member  410  may contact the curved area  482  of the rear plate  480 . The second adhesion member  420  may be brought into contact with the flat area  481  of the rear plate  480  with a width that is larger than that of the first adhesion member  410  filled in the first hole area  510  due to a pressing force generated when the rear plate  480  is pressed to the side member  441 . 
     According to an embodiment, the first adhesion member  410  may contact the rear plate  480  within a first open time after the first liquid type adhesive  1212  is discharged into the adhesion tunnels  500 . For example, the first liquid type adhesive  1212  may be coupled to the rear plate  480  within the first open time of 4 minutes or less. The first adhesion member  410  may have a thixotropic property for the first open time that is a time that is allowed until it contacts the rear plate  480 . The thixotropic property may be a property of maintaining an applied state due to a strong surface tension in spite of a low viscosity. 
     The second adhesion member  420  may be adhered to the rear plate  480  within a second open time after the second liquid type adhesive is discharged into the first adhesion member  410 . The second adhesion member  420  may have a thixotropic property for the second open time that is a time that is allowed until it contacts the rear plate  480 . Because the second liquid type adhesive that forms the second adhesion member  420  is applied after the first liquid type adhesive  1212 , it may be coupled to the rear plate  480  within the second open time that is shorter than in the first liquid type adhesive  1212 . 
     According to various embodiments of the disclosure, the structure, in which the adhesion tunnels  500  are formed in the side member  441  that faces the curved area  482  and the flat area  481  of the rear plate  480 , has been mainly described, but the second adhesion tunnels may be formed in the front plate (e.g.,  470 ) and the side member  441  that faces the curved area and the flat area of the display  430  in addition. The second adhesion tunnels may be configured in a way that is the same as or similar to that of the adhesion tunnels  500  that faces the rear plate  480 . The adhesion member filled in the second adhesion tunnels may be configured in a way that is the same as or similar to that of the adhesion member coupled to the rear plate. 
     An electronic device according to another embodiment of the disclosure includes a first plate  480  including a flat area  481  facing a first direction and a curved area  482  extending from at least a portion of a periphery of the flat area, a second plate facing a second direction that is opposite to the first direction, a side member surrounding an interior space between the first plate and the second plate and including a first outer surface facing the flat area, and a second outer surface facing the curved area, a plurality of adhesion tunnels  500  formed to pass through the side member from the first outer surface  451  to the second outer surface  452 , and an adhesion member  400  filled in interiors of the plurality of adhesion tunnels to be formed between the first plate and the side member, and contacting the curved area and the flat area, and each of the plurality of adhesion tunnels  500  includes a first hole area  510  overlapping the flat area  481 , and passing through the first outer surface  451 , a second hole area  520  overlapping the curved area  482 , and passing through the second outer surface  452 , and a connection area  530  disposed between the first hole area and the second hole area, and connecting the first hole area and the second hole area. 
     According to the disclosure, the adhesion tunnel may be “L”-shaped. 
     According to the disclosure, a width of the first hole area may become larger as it goes from the connection area toward the flat area, and a width of the second hole area may become larger as it goes from the connection area toward the curved area. 
     According to the disclosure, the first hole area may be surrounded by a first inner surface, a second inner surface, a third inner surface, and a fourth inner surface, the second hole area may be surrounded by a fifth inner surface, a sixth inner surface, a seventh inner surface, and an eighth inner surface, at least any one of the first inner surface, the second inner surface, the third inner surface, and the fourth inner surface may be formed to be inclined with respect to an imaginary line that is parallel to a center line of the first hole area, and at least any one of the fifth inner surface, the sixth inner surface, the seventh inner surface, and the eighth inner surface may be formed to be inclined with respect to an imaginary line that is parallel to a center line of the second hole area. 
     According to the disclosure, the connection area may include a first inner corner surface connecting the first inner surface that face an outside of the electronic device, and the fifth inner surface, and a second inner corner surface connecting a second inner surface that faces an inside of the electronic device, and a sixth inner surface, and having a radius of curvature that is smaller than that of the first inner corner surface. 
     According to the disclosure, at least any one of the first inner corner surface and the second inner corner surface may be curved in a direction that defines an obtuse angle. 
     According to the disclosure, each of the plurality of adhesion tunnels may be disposed to be spaced apart from an adjacent adhesion tunnel in the remaining areas, except for a corner area of the side member. 
     According to the disclosure, the adhesion member may include a first adhesion member disposed between the curved area and the side member, and filled in the plurality of adhesion tunnels, and a second adhesion member disposed between the flat area and the side member, and formed on the side member along the side member. 
     According to the disclosure, the first adhesion member may contact the curved area of the first plate, and may be formed in a curved form along the curved area. 
     According to the disclosure, the second adhesion member may contact the flat area of the first plate, and at least a partial area thereof may be formed in a flat form along the flat area. 
     According to the disclosure, the second adhesion member may be formed on the first adhesion member filled in the first hole area. 
     According to the disclosure, the second adhesion member may be formed on the second outer surface disposed between the first hole area and the second hole area. 
     According to the disclosure, the fifth inner surface may extend toward the curved area rather than toward the sixth inner surface. 
     According to the disclosure, the electronic device may further include a partition wall member disposed on the fifth inner surface. 
     According to the disclosure, at least any one of the first inner surface, the second inner surface, the third inner surface, the fourth inner surface, the fifth inner surface, the sixth inner surface, the seventh inner surface, the eighth inner surface, the first inner corner surface, and the second inner corner surface may have a convexo-concave surface. 
     An electronic device according to yet another embodiment of the disclosure includes a rear plate including a flat area facing a first direction and a curved area extending from at least a portion of a periphery of the flat area, a front plate facing a second direction that is opposite to the first direction, a side member surrounding an interior space between the rear plate and the front plate, and having a plurality of adhesion tunnels facing the curved area from the flat area, and an adhesion member filled in interiors of the plurality of adhesion tunnels to be formed between the rear plate and the side member, and contacting the curved area and the flat area, each of the plurality of adhesion tunnels includes a first hole area overlapping the flat area and opened toward the flat area, a second hole area overlapping the curved area and opened toward the curved area, and a connection area disposed between the first hole area and the second hole area, and connecting the first hole area and the second hole area. 
     According to the disclosure, the adhesion tunnel may be “L”-shaped. 
     According to the disclosure, a width of the first hole area may become larger as it goes from the connection area toward the flat area, and a width of the second hole area may become larger as it goes from the connection area toward the curved area. 
     According to the disclosure, a first inner corner surface and a second inner corner surface, which face each other, may be formed in the connection area, and at least any one of the first inner corner surface and the second inner corner surface may be curved in a direction that defines an obtuse angle. 
     According to the disclosure, each of the plurality of adhesion tunnels may be disposed to be spaced apart from an adjacent adhesion tunnel in the remaining areas, except for a corner area of the side member. 
     According to the disclosure, the first hole area is an injection hole through which a liquid type adhesive that forms a first adhesion member is injected. 
     According to the disclosure, the second hole area is a discharge hole through which a liquid type bond that forms the first adhesion member is discharged toward the curved area of the rear plate. 
     According to the disclosure, the connection area comprises a direction switching area for discharging the liquid type adhesive in a discharge direction that is different from an injection direction of the liquid type adhesive. 
     It should be appreciated 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. With regard to the description of the drawings, similar reference numerals may be used to refer to similar or related elements. As used herein, each of such phrases as “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 “at least one of A, B, or C,” may include any one of, or all possible combinations of the items enumerated together in a corresponding one of the phrases. As used herein, such terms as “1st” and “2nd,” or “first” and “second” may be used to simply distinguish a corresponding component from another, and does not limit the components in other aspect (e.g., importance or order). It is to be understood that if 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., wiredly), wirelessly, or via a third element. 
     In the disclosure, the expression “configured to” may be interchangeably used with, for example, “suitable for”, “capable of”, “modified to”, “made to”, “able to”, or “designed to” according to a situation in a hardware or software way. In some situations, the expression “a device configured to” may mean that the device is “capable of” operating together with another device or other components. central processing unit (CPU), for example, a “processor configured to (or set to) perform A, B, and C” may mean a dedicated processor (e.g., an embedded processor) for performing a corresponding operation or a generic-purpose processor (e.g., a central processing unit (CPU) or an application processor) which may perform corresponding operations by executing one or more programs which are stored in a memory device. 
     The term “module” used in the disclosure may include a unit configured in a hardware, software, or firmware way, and for example, may be used interchangeably with the terms such as logic, a logic block, a component, or a circuit. The “module” may be an integral component, or a minimum unit or a part which performs one or more functions. The “module” may be implemented mechanically or electronically, and for example, may include an application-specific integrated circuit (ASIC) chip, field-programmable gate arrays (FPGSs), or a programmable logic device that is known or to be developed in the future, which performs some operations. 
     At least some of the devices (e.g., modules or functions) or methods (e.g., operations) according to various embodiments of the disclosure may be implemented by an instruction stored in a computer-readable storage medium (e.g., the memory), for example, in the form of a program module. When the instruction is executed by the processor (for example, the processor), the processor may perform a function corresponding to the instruction. The computer-readable recording medium may include a hard disk, a floppy disk, a magnetic medium (e.g., a magnetic tape), an optical recording medium (e.g., a compact disc read only memory (CD-ROM) or a digital versatile disc (DVD)), a magneto-optical medium (e.g., a floptical disk), and an embedded memory. The instruction may include a code made by a compiler or a code that may be executed by an interpreter. 
     According to 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. According to 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, 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. According to 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. 
     While the disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents.