Patent Publication Number: US-2022219364-A1

Title: Cover plate including pattern and electronic device including the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation of International Application No. PCT/KR2021/019940, filed on Dec. 27, 2021, which claims priority to Korean Patent Application No. 10-2021-0004369, filed on Jan. 13, 2021 in the Korean Intellectual Property Office, the disclosures of which are herein incorporated by reference. 
    
    
     TECHNICAL FIELD 
     Certain embodiments disclosed herein relate to a cover plate having a pattern formed thereon, and an electronic device including the cover plate. 
     BACKGROUND ART 
     A micropattern may be formed on a cover plate on the exterior of an electronic device that is aesthetically pleasing. 
     The micropattern may refer to a micro-scale regular pattern. Light may be reflected in different manners depending on the pattern type. This results in exhibiting different textures. Such a micropattern may be used to provide an aesthetic appearance to the cover plate. 
     If the micropattern is formed on a UV film, moldings for forming the micropattern on the UV film may be easily damaged. This can make mass production difficult. 
     If the cover plate is manufactured having a micropattern formed thereon through injection molding, it may be difficult to manufacture a cover plate including different patterns. During injection molding, materials injected into mold cores would likely be solidified. Materials would likely be solidified because it may be difficult to form multiple patterns on a single mold core. 
     In an attempt to solve this problem, it may be considered to form different patterns on multiple different mold cores. The multiple mold cores can then be to joined to each other. The cover plate can then be injection-molded. However, disposing cooling channels with an injection-molding device including multiple mold cores has disadvantages. In addition, the level difference between the multiple mold cores may degrade continuity of patterns formed on the cover plate. 
     SUMMARY 
     Certain embodiments disclosed herein may provide a cover plate including a pattern. 
     According to certain embodiments, a cover plate of an electronic device, comprises: a first pattern formed in a first region of the cover plate; and a second pattern formed in a second region of the cover plate, wherein the first pattern has a first flat part and a first protrusion part protruding at a first height with respect to the first flat part, the first flat part and the first protrusion part being repeatedly arranged, the second pattern has a second flat part and a second protrusion part protruding at a second height with respect to the second flat part, the second flat part and the second protrusion part being repeatedly arranged, and the first flat part of the first pattern and the second flat part of the second pattern are continuously joined to each other at a portion at which the first pattern and the second pattern are connected. 
     According to certain embodiments, a method comprises forming a cover plate on an electronic device by molding a polymer material using a first mold core and a second mold core, forming a first pattern using a first mold pattern in a first region of one surface of a first mold core, and forming a second pattern using a second mold pattern in a second region of the one surface of the first mold core. 
     According to certain embodiments disclosed herein, a cover plate including multiple patterns may be formed through injection molding such that the part that connects different patterns has no, or no visible difference in texture, and no separate molding or film is necessary to endow patterns. This reduces process costs. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       In connection with the description of the drawings, same or similar reference numerals will be used to refer to same or similar elements. 
         FIG. 1A  is a front perspective view of an electronic device according to certain embodiments disclosed in the disclosure; 
         FIG. 1B  is a rear perspective view of the electronic device of  FIG. 1A ; 
         FIG. 1C  is an exploded perspective view of the electronic device of  FIG. 1A ; 
         FIG. 2  and  FIG. 3  are perspective views of a cover plate according to certain embodiments disclosed in the disclosure; 
         FIG. 4  is a partially cut cross sectional view of a cover plate taken along line A-A illustrated in  FIG. 2  according to certain embodiments; 
         FIG. 5  is a schematic view of an injection device for manufacturing a cover plate according to certain embodiments disclosed in the disclosure; 
         FIG. 6A  is a view, which is schematized as a cross sectional view, illustrating a process of forming a mold pattern according to certain embodiments disclosed in the disclosure; 
         FIG. 6B  is a perspective view of a first mold core according to certain embodiments disclosed in the disclosure; 
         FIG. 7A  and  FIG. 7B  are views illustrating a machining process of a first mold core according to certain embodiments disclosed in the disclosure; and 
         FIG. 8A  and  FIG. 8B  are views illustrating a machining tool according to certain embodiments disclosed in the disclosure. 
         FIG. 9  is flow diagram of a method according to certain embodiments disclosed in the disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     It should be appreciated that certain embodiments of the present 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. 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, 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. 
     BRIEF DESCRIPTION OF REFERENCE NUMERALS 
     
         
           200 : Cover plate 
           201 : First region 
           202 : Second region 
           210 : First pattern 
           220 : Second pattern 
       
    
       FIGS. 1A to 1C  describe an electronic device that can have a cover plate. The appearance of the electronic device can be improved by forming a micropattern on the cover plate. 
     Electronic Device 
     Referring to  FIGS. 1A, 1B, and 1C , according to an embodiment, an electronic device  100  may include a housing  110  that includes a first surface (or front surface)  110 A, a second surface (or rear surface)  110 B, and a lateral surface  110 C that surrounds a space between the first surface  110 A and the second surface  110 B. According to another embodiment, the housing  110  may refer to a structure that forms a part of the first surface  110 A, the second surface  110 B, and the lateral surface  110 C. According to an embodiment, the first surface  110 A may be formed of a front plate  102  (e.g., a glass plate or polymer plate coated with a variety of coating layers) at least a part of which is substantially transparent. The second surface  110 B may be formed of a rear plate  111  which is substantially opaque. The rear plate  111  may be formed of, for example, coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel (STS), or magnesium), or any combination thereof. The lateral surface  110 C may be formed of a lateral bezel structure (or “lateral member”)  118  which is combined with the front plate  102  and the rear plate  111  and includes a metal and/or polymer. The rear plate  111  and the lateral bezel structure  118  may be integrally formed and may be of the same material (e.g., a metallic material such as aluminum). 
     In the shown embodiment, the front plate  102  may include two first regions  110 D disposed at long edges thereof, respectively, and bent and extended seamlessly from the first surface  110 A toward the rear plate  111 . In the shown embodiment, the rear plate  111  may include two second regions  110 E disposed at long edges thereof, respectively, and bent and extended seamlessly from the second surface  110 B toward the front plate  102  (refer to  FIG. 2 ). In certain embodiments, the front plate  102  (or the rear plate  111 ) may include only one of the first regions  110 D (or of the second regions  110 E). In certain embodiments, the first regions  110 D or the second regions  110 E may be omitted in part. In the embodiments, when viewed from a lateral side of the electronic device  100 , the lateral bezel structure  118  may have a first thickness (or width) on a lateral side where one of the first regions  110 D or one of the second regions  110 E is not included, and may have a second thickness, being less than the first thickness, on another lateral side where one of the first regions  110 D or one of the second regions  110 E is included. 
     According to an embodiment, the electronic device  100  may include at least one of a display  101 , audio modules  103 ,  107  and  114 , sensor modules  104 ,  116  and  119 , camera modules  105 ,  112  and  113 , key input devices  117 , a light emitting device  106 , and connector holes  108  and  109 . In certain embodiments, the electronic device  100  may omit at least one (e.g., the key input devices  117  or the light emitting device  106 ) of the above components, or may further include other components. 
     The display  101  may be exposed through a substantial portion of the front plate  102 , for example. In certain embodiments, at least a part of the display  101  may be exposed through the front plate  102  that forms the first surface  110 A and the first regions  110 D. In certain embodiments, outlines (i.e., edges and corners) of the display  101  may have substantially the same form as those of the front plate  102 . In another embodiment (not shown), the spacing between the outline of the display  101  and the outline of the front plate  102  may be substantially unchanged in order to enlarge the exposed area of the display  101 . 
     In another embodiment (not shown), a recess or opening may be formed in a portion of a display area of the display  101  to accommodate at least one of the audio modules (e.g., the audio module  114 ), the sensor module  104 , the camera module  105 , and the light emitting device  106 . In another embodiment (not shown), at least one of the audio modules (e.g., the audio module  114 ), the sensor module  104 , the camera module  105 , the sensor module  116  (e.g., a fingerprint sensor), and the light emitting device  106  may be disposed on the back of the display area of the display  101 . In another embodiment (not shown), the display  101  may be combined with, or adjacent to, a touch sensing circuit, a pressure sensor capable of measuring the touch strength (pressure), and/or a digitizer for detecting a stylus pen. In certain embodiments, at least a part of the sensor modules  104  and  119  and/or at least a part of the key input devices  117  may be disposed in one of the first regions  110 D and/or one of the second regions  110 E. 
     The audio modules  103 ,  107  and  114  may correspond to a microphone hole (e.g., the audio module  103 ) and speaker holes (e.g., the audio modules  107  and  114 ). The microphone hole may contain a microphone disposed therein for acquiring external sounds and, in a case, contain a plurality of microphones to sense a sound direction. The speaker holes may be classified into an external speaker hole and a call receiver hole. In certain embodiments, the microphone hole and the speaker holes may be implemented as a single hole, or a speaker (e.g., a piezo speaker) may be provided without the speaker holes. 
     The sensor modules  104 ,  116  and  119  may generate electrical signals or data corresponding to an internal operating state of the electronic device  100  or to an external environmental condition. The sensor modules  104 ,  116  and  119  may include a first sensor module (e.g., the sensor module  104 ) (e.g., a proximity sensor) and/or a second sensor module (e.g., a fingerprint sensor) disposed on the first surface  110 A of the housing  110 , and/or a third sensor module (e.g., the sensor module  119 ) (e.g., a heart rate monitor (HRM) sensor) and/or a fourth sensor module (e.g., the sensor module  116 ) (e.g., a fingerprint sensor) disposed on the second surface  110 B of the housing  110 . The fingerprint sensor may be disposed on the second surface  110 B as well as the first surface  110 A (e.g., the display  101 ) of the housing  110 . The electronic device  100  may further include at least one of a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. 
     The camera modules  105 ,  112  and  113  may include a first camera device (e.g., the camera module  105 ) disposed on the first surface  110 A of the electronic device  100 , and a second camera device (e.g., the camera module  112 ) and/or a flash (e.g., the camera module  113 ) disposed on the second surface  110 B. The camera module  105  or the camera module  112  may include one or more lenses, an image sensor, and/or an image signal processor. The flash may include, for example, a light emitting diode or a xenon lamp. In certain embodiments, two or more lenses (infrared cameras, wide angle and telephoto lenses) and image sensors may be disposed on one side of the electronic device  100 . 
     The key input devices  117  may be disposed on the lateral surface  110 C of the housing  110 . In another embodiment, the electronic device  100  may not include some or all of the key input devices  117  described above, and the key input devices  117  which are not included may be implemented in another form such as a soft key on the display  101 . In certain embodiments, the key input devices  117  may include the sensor module  116  disposed on the second surface  110 B of the housing  110 . 
     The light emitting device  106  may be disposed on the first surface  110 A of the housing  110 , for example. For example, the light emitting device  106  may provide status information of the electronic device  100  in an optical form. In certain embodiments, the light emitting device  106  may provide a light source associated with the operation of the camera module  105 . The light emitting device  106  may include, for example, a light emitting diode (LED), an infrared (IR) LED, or a xenon lamp. 
     The connector holes  108  and  109  may include a first connector hole (e.g., the connector hole  108 ) adapted for a connector (e.g., a universal serial bus (USB) connector) for transmitting and receiving power and/or data to and from an external electronic device, and/or a second connector hole (e.g., the connector hole  109 ) adapted for a connector (e.g., an earphone jack) for transmitting and receiving an audio signal to and from an external electronic device. 
     Referring to  FIG. 1C , an electronic device may include a lateral bezel structure  121 , a first support member  121 - 1  (e.g., a bracket), a front plate  122 , a display  123 , a printed circuit board (PCB)  124 , a battery  125 , a second support member  126  (e.g., a rear case), an antenna  127 , and a rear plate  128 . In certain embodiments, the electronic device  100  may omit at least one (e.g., the first support member  121 - 1  or the second support member  126 ) of the above components or may further include another component. Some components of the electronic device  100  may be the same as or similar to those of the electronic device  100  shown in  FIG. 1A  or  FIG. 1B , thus, descriptions thereof are omitted below. 
     The first support member  121 - 1  is disposed inside the electronic device  100  and may be connected to, or integrated with, the lateral bezel structure  121 . The first support member  121 - 1  may be formed of, for example, a metallic material and/or a non-metal (e.g., polymer) material. The first support member  121 - 1  may be combined with the display  123  at one side thereof and also combined with the PCB  124  at the other side thereof. On the PCB  124 , a processor, a memory, and/or an interface may be mounted. The processor may include, for example, one or more of a central processing unit (CPU), an application processor (AP), a graphics processing unit (GPU), an image signal processor (ISP), a sensor hub processor, or a communications processor (CP). 
     The memory may include, for example, volatile memory or non-volatile memory. 
     The interface may include, for example, a high definition multimedia interface (HDMI), a USB interface, a secure digital (SD) card interface, and/or an audio interface. The interface may electrically or physically connect the electronic device  100  with an external electronic device and may include a USB connector, an SD card/multimedia card (MMC) connector, or an audio connector. 
     The battery  125  is a device for supplying power to at least one component of the electronic device  100 , and may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. At least a part of the battery  125  may be disposed on substantially the same plane as the PCB  124 . The battery  125  may be integrally disposed within the electronic device  100 , and may be detachably disposed from the electronic device  100 . 
     The antenna  127  may be disposed between the rear plate  128  and the battery  125 . The antenna  127  may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. The antenna  127  may perform short-range communication with an external device, or transmit and receive power required for charging wirelessly. An antenna structure may be formed by a part or combination of the lateral bezel structure  121  and/or the first support member  121 - 1 . 
     As noted above, the aesthetic appearance of the electronic device  100  can be improved by forming a micropattern on the housing  110 . 
       FIG. 2  and  FIG. 3  are perspective views of a cover plate according to certain embodiments disclosed in the disclosure. 
     According to certain embodiments, for example, a cover plate  200  illustrated in  FIG. 2  may be the rear plate  1111  illustrated in  FIG. 1B  or the rear plate  128  illustrated in  FIG. 1C , and may be disposed on one surface (e.g., the second surface  110 B of  FIG. 1B  or the rear surface of an electronic device) of an electronic device (e.g., the electronic device  100  of  FIG. 1A ). 
     The cover plate  200  may block various components included in an electronic device from the outside. The cover plate  200  disposed on one surface of an electronic device may form the external appearance of an electronic device. In the above, it is described that the cover plate  200  is disposed on the rear surface of an electronic device and is an element constituting the external appearance of an electronic device, but the cover plate  200  may be disposed on the front surface or side surfaces of an electronic device and may be disposed on various positions capable of constituting the external appearance of an electronic device. 
     The cover plate  200  may be manufactured in an injection molding method. In the foregoing process, a first pattern  210  and a second pattern  220  may be formed on the cover plate  200 . The cover plate  200  may include multiple layers, and the first pattern  210  and the second pattern  220  may be formed on at least one of the multiple layers. 
     The first pattern  210  and the second pattern  220  may be formed to be seen through a first surface  200 A of the cover plate  200 . For example, the first pattern  210  and the second pattern  220  may be formed on the first surface  200 A. Here, the first surface  200 A of the cover plate  200  may mean an outer surface of the cover plate  200 . The first pattern  210  may be a pattern formed in a first region  201  of the first surface  200 A, and the second pattern  220  may be a pattern formed in a second region  202  of the first surface  200 A. The first region  201  and the second region  202  may mean regions different from each other in the first surface  200 A of the cover plate  200 . In another embodiment, the first pattern  210  may be formed on a surface opposite to the first surface  200 A. If the first surface  200 A is the outer surface of a cover plate constituting the external appearance of an electronic device, the opposite surface of the first surface  200 A may mean the inner surface of the cover plate. In addition, the first pattern  210  and second pattern  220  may be formed on both the first surface  200 A and the opposite surface of the first surface  200 A. 
     According to the shape of a pattern formed on the cover plate  200 , it may be recognized that the cover plate  200  shows various textures. Since the shapes of reflection of light may be different according to the shapes of patterns, it may be possible to provide various a pleasing texture according to the shapes of patterns. For example, in a case where the first pattern  210  formed in the first region  201  and the second pattern  220  formed in the second region  202  of the cover plate  200  are patterns having different shapes, it may be recognized that the first region  201  and the second region  202  of the cover plate  200  show textures different from each other. 
     In some embodiments, a cover plate may include three or more different patterns. For example, as illustrated in  FIG. 3 , a first pattern  310  (diagonal lines) may be formed in a first region  301 , a second pattern  320  (vertical lines) may be formed in a second region  302 , and a third pattern  330  (circular lines) may be formed in a third region  303 . In the case, it may be recognized that the first region  301 , the second region  302 , and the third region  303  of the cover plate  300  show textures different from each other. 
       FIG. 4  is a partially cut cross sectional view of a cover plate taken along line A-A illustrated in  FIG. 2 , proximate to the center line where the first pattern  210  abuts the second pattern  220 . The size ratio of elements illustrated in  FIG. 4  are illustrated in some exaggeration for the convenience of description. 
     The cover plate  200  may include an injection molding product  230 . The first pattern  210  and the second pattern  220  are formed in an intermediate layer  240 . The intermediate layer is laminated on the injection molding product  230 , and a painting layer  250  is laminated on the intermediate layer  240 . 
     The intermediate layer  240  may include a brightness layer which enables the first pattern  210  and the second pattern  220  to more smoothly diffuse light. For example, the brightness layer may be made of a material capable of amplifying light diffusion. The brightness layer may be included in the intermediate layer  240  through deposition by various deposition methods (e.g., a chemical vapor deposition (CVD), a physics vapor deposition (PVD), or an atomic layer deposition (ALD)). According to a case, it may be possible that the brightness layer is laminated on the injection molding product  230  in a method of attaching a film-shaped material thereto. 
     The painting layer  250  may be a layer including a coating material which gives the cover plate  200  a specific color. In addition, the painting layer  250  may include a protective layer for protecting a coating material so as to prevent the coating material from being peeled off therefrom. In an embodiment, the intermediate layer  240  may be a layer including a material having an adhesive property which enables the painting layer  250  to smoothly adhere to the injection molding product  230 , and a material (e.g., a putty, or primer) capable of compensating for a height difference therebetween. 
     The first pattern  210  and the second pattern  220  of the cover plate  200  may be a pattern formed on the injection molding product  230  included in the cover plate  200 , but the injection molding product  230  may be an element included in the cover plate  200 . Therefore, hereinafter, the first pattern  210  and the second pattern  220  will be described as a pattern formed on the cover plate  200  for the convenience of description. 
     Referring to  FIG. 4 , the first pattern  210  and second pattern  220  may be formed in different regions of the cover plate  200 . The first pattern  210  may be a pattern formed in a first region  201 , and the second pattern  220  may be a pattern formed in a second region  202 . The first pattern  210  and the second pattern  220  may have shapes different from each other. 
     According to certain embodiments, the first pattern  210  may include a structure having a first flat part  212  and a first protrusion part  211  protruding at a first height H 1  with respect to the first flat part  211 . The first flat part  212  and the first protrusion part  211  can be repeatedly arranged, such that there are repeating patterns of first flat parts  212  and first protrusion parts  211 , wherein each of repeated first protrusion parts  211  have substantially the first height H 1 . Alternatively, each of the first protrusion parts  211  can have heights that are within 5% deviation of the first height, or are within a deviation from the first height, where such deviation is visibly indiscernible, or cannot be discerned by touching. 
     In an embodiment, the protruded height H 1  of the first protrusion part  211  may be about 1 μm to 3 μm. In another embodiment, the protruded height H 1  of the first protrusion part  211  may be about 3 μm to 10 μm. The protruded height H 1  of the first protrusion part  211  may be variously changed in addition to the above description. 
     The second pattern  220  may include a structure having a second flat part  221  and a second protrusion part  221  protruding at a second height, height H 2 , with respect to the second flat part  222 , the second flat part  222 . The second protrusion part  221  being repeatedly arranged, such that there are repeating patterns of second flat parts  222  and second protrusion parts  221 , wherein each of repeated second protrusion parts  221  have substantially the second height H 2 . Alternatively, each of the second protrusion parts  221  can have heights that are within 5% deviation of the second height, or are within a deviation from the second height, where such deviation is visibly indiscernible, or cannot be discerned by touching. 
     In an embodiment, the protruded height H 2  of the second protrusion part  221  may be about 1 μm to 3 μm. In another embodiment, the protruded height H 2  of the second protrusion part  221  may be about 3 μm to 10 μm. The protruded height H 2  of the second protrusion part  221  may be variously changed in addition to the above description. 
     The position relation (e.g., the interval) between the first protrusion part  211  and the first flat part  212  and the shapes (e.g., a width or protrusion height) thereof may be different from the position relation between the second protrusion part  221  and the second flat part  222  and the shapes thereof, respectively. According to an embodiment, the protruded height of the first protrusion part  211  and the protruded height of the second protrusion part  221  may be different from each other. The shapes of the first protrusion part  211  and the first flat part  212  may be different from the shapes the second protrusion part  221  and the second flat part  222 , respectively, so that the first pattern  210  and the second pattern  220  become patterns different from each other. For example, the first pattern  210  may be a pattern including a curved-line, and the second pattern  220  may be a pattern including a straight-line. In the case, the first protrusion part  211  and the first flat part  212  of the first pattern  210  may be formed in a curved-line shape, the second protrusion part  221  and the second flat part  222  may be formed in a straight-line shape. Here, the curved-line may include a concentric circle, and the straight-line may include a horizontal-line, a vertical-line, and a diagonal-line with respect to the cover plate  200 . 
     According to certain embodiments, in a portion at which the first pattern  210  and the second pattern  220  are connected to each other, the first flat part  212  of the first pattern  210  and the second flat part  222  of the second pattern  220  may be continuously connected to each other. For example, a height difference or interval may not be formed between the first flat part  212  and the second flat part  222 . The first pattern  210  and the second pattern  220  formed on the cover plate  200  may be formed by mold patterns (e.g., the first mold pattern  610  and the second mold pattern  620  of  FIG. 6A ) formed on one mold core (e.g., the first mold core  600  of  FIG. 6A ), respectively, so that the connected portion thereof is continuously formed. Detailed descriptions about the process in which the cover plate  200  including the first pattern  210  and the second pattern  220  is injection-molded will be described below. 
       FIG. 5  is a schematic view of an injection device for manufacturing a cover plate  200  according to certain embodiments disclosed in the disclosure. 
     Referring to  FIG. 5 , an injection device  500  may include a mold part  530 , a storage part  510 , and a providing part  520 . 
     According to certain embodiments, the storage part  510  may include a space in which an injection material is stored. The injection material stored in the storage part  510  may be a solid state or an at least partially melted state. The injection material may be a polymer material. For example, a polymer compound such as a synthetic resin may be used as the injection material. The injection material may be an at least partially transparent material in a coagulated state. For example, the injection material may be a material having about 70% of the transmittance or more when coagulated such that an optical diffusion or a prism phenomenon occurs by patterns (e.g., the patterns  210  and  220  of  FIG. 2 ) of a cover plate (e.g., the cover plate  200  of  FIG. 2 ) manufactured by an injection molding. 
     The providing part  520  may provide the injection material stored in the storage part  510  to the mold part  530 . The providing part  520  may include a pipe conduit  521  which the injection material of the storage part  510  is introduced into and temporary stores in, a pressing device  522  configured to push out the injection material stored in the pipe conduit  521  in the direction of the mold part  530 , and a nozzle  523  configured to connect the pipe conduit  521  and the mold part  530 . For example, the pressing device  522  may be a screw connected to a hydraulic cylinder  524 . The hydraulic cylinder  524  may push out the screw in the direction of the nozzle  523  so that the screw rotates. Therefore, the injection material stored in the pipe conduit  521  may be pressed in the direction of the nozzle  523 . The pipe conduit  521  may have a heater installed therein to change the injection material stored in the pipe conduit  521  into a liquid state or to maintain the liquid state thereof. 
     The mold part  530  may include a first mold core  531 , a second mold core  532 , and a cooling channel  533 . The injection material introduced from the providing part  520  may be injected between the first mold core  531  and the second mold core  532 . When an injection material has been injected, the first mold core  531  and the second mold core  532  may be cooled by a coolant supplied through the cooling channel  533  so that the injected injection material coagulates, and thus the injection molding may be completed. 
     The injection device  500  described above may be merely a general example of a device for an injection molding, and various injection devices  500  may be used for manufacturing the cover plate of the disclosure within a range obvious to a person skilled in the art. 
       FIG. 6A  is a view, which is schematized as a cross sectional view, illustrating a process of forming a mold pattern according to certain embodiments disclosed in the disclosure.  FIG. 6B  is a perspective view of a first mold core according to certain embodiments disclosed in the disclosure. 
     Hereinafter, it will be described under an assumption that a cover plate manufactured in an injection molding method by a first mold core  600  is the cover plate illustrated in  FIG. 2 . In descriptions related to a cover plate and patterns formed on the cover plate, the same reference numerals as those of  FIG. 2  will be used. 
     A first mold pattern  610  and a second mold pattern  620  may be formed on one surface  600 A of a first mold core  600 . The first mold pattern  610  may be a mold pattern formed in a shape corresponding to the first pattern  210  formed on the cover plate  200 , and the second mold pattern  620  may be a mold pattern formed in a shape corresponding to the second pattern  220  formed on the cover plate  200 . The first mold pattern  610  and the second mold pattern  620  may be formed to have shapes different from each other. For example, the first mold pattern  610  may be a pattern including a curved-line, and the second mold pattern  620  may be a pattern including a straight-line. In the case, the first pattern  210  formed by the first mold pattern  610  may become a pattern including a curved-line, and the second pattern  220  formed by the second mold pattern  620  may become a pattern including a straight-line. 
     Referring to  FIG. 6A  and  FIG. 6B , the first mold pattern  610  may be formed in a first region  601  of the one surface  600 A of the first mold core  600 , and the second mold pattern  620  may be formed in a second region  602  of the one surface  600 A of the first mold core  600 . The cover plate  200  disclosed in the disclosure may be formed through an injection molding by the first mold core  600  including the first mold pattern  610  and the second mold pattern  620 . 
     When an injection material is injected into the first mold core  600  including the first mold pattern  610  and the second mold pattern  620 , the first pattern  210  may be formed by the first mold pattern  610 , and the second pattern  220  may be formed by the second mold pattern  620 . 
     As illustrated in  FIG. 6A  and  FIG. 6B , both the first mold pattern  610  and the second mold pattern  620  may be formed on the one surface  600 A of the first mold core  600 . Therefore, as illustrated in  FIG. 4 , the first pattern  210  and the second pattern  220  of the cover plate  200  injection-molded by the first mold core  600  may have a continuously connected shape. 
     The first mold pattern  610  and the second mold pattern  620  may be formed in various shapes according to a machining method. For example, the first mold pattern  610  may be formed to have the depth H 3  of 1 μm to 3 μm with respect to a reference surface of the first mold core  600 . In addition, the first mold pattern  610  may be formed to have the depth H 3  of 3 μm to 10 μm with respect to the reference surface of the first mold core  600 . For example, the second mold pattern  620  may be formed to have the depth H 4  of 1 μm to 3 μm with respect to the reference surface of the first mold core  600 . In addition, the second mold pattern  620  may be formed to have the depth H 4  of 3 μm to 10 μm with respect to the reference surface of the first mold core  600 . In addition, the depth H 3  of the first mold pattern  610  and the depth H 4  of the second mold pattern may be different. 
       FIG. 7A  and  FIG. 7B  are views illustrating a machining process of a first mold core according to certain embodiments disclosed in the disclosure. 
     The first mold pattern  610  and second mold pattern  620  may be formed in regions different from each other on the previously substantially flat one surface  600 A of the first mold core  600  by one the same machining tool  700 . The machining tool  700  may relatively move with respect to the first mold core  600  by a movement part (not shown) according to computer control, to form the first mold pattern  610  and the second mold pattern  620 . For example, the movement part may mean a device for transferring the machining tool  700 , may mean a device for transferring the first mold core  600 , and in some cases, may mean a device for transferring both the machining tool  700  and the first mold core  600 . 
     The first mold pattern  610  may be formed in the first region  601  of the first mold core  600  by a tip  720  of the machining tool  700 , and the second mold pattern  620  may be formed in the second region  602 . In the case, the tip  720  of the machining tool  700  may move forming the first mold pattern  610  and the second mold pattern  620  by pressing a portion of the first mold core  600  instead of cutting a portion the first mold core  600  to form the first mold pattern  610  and the second mold pattern  620 . By using the above machining method, it may be possible to form two types of patterns different from each other on the first mold core  600  through one or the same machining tool  700 . 
     According to certain embodiments, as illustrated in (a) of  FIG. 7B , when the tip  720  of the machining tool  700  presses a portion of the first region  601  of the first mold core  600 , the pressed portion may be more compressed than an unpressed portion so that the first mold pattern  610  is formed. When the tip  720  of the machining tool  700  presses a portion of the second region  602  of the first mold core  600 , the pressed portion may be more compressed than an unpressed portion so that the second mold pattern  620  is formed. 
     According to certain embodiments, as illustrated in (b) of  FIG. 7B , when the tip  720  of the machining tool  700  presses a portion of the first region  601  of the first mold core  600 , a material constituting the first mold core  600  may be pushed out of the pressed portion so that the first mold pattern  610  is formed. When the tip  720  of the machining tool  700  presses a portion of the second region  602  of the first mold core  600 , a material constituting the first mold core  600  may be pushed out of the pressed portion so that the second mold pattern  620  is formed. 
     The machining method described above is a method in which the tip  720  of the machining tool  700  continuously moves in a state of pressing the first mold core  600 , whereas, as illustrated (c) of in  FIG. 7C , the tip  720  of the machining tool  700  may hit a portion of first region  601  of the first mold core  600  so that the first mold pattern  610  is formed. The tip  720  of the machining tool  700  may hit a portion of the second region  602  of the first mold core  600  so that the second mold pattern  620  is formed. The method in which the first mold pattern  610  and the second mold pattern  620  are formed by the above hitting may form a pattern having a deeper depth rather than the method in which the machining tool  700  continuously moves in a state of pressing the first mold core  600 . 
       FIG. 8A  and  FIG. 8B  are views illustrating a machining tool according to certain embodiments disclosed in the disclosure. 
     According to certain embodiments, machining tools  801  and  802  for machining the first mold pattern  610  and the second mold pattern  620  may include machining bodies  810  and  830 , and tips  820  and  840 , respectively. 
     According to certain embodiments, the machining tool  801  illustrated in  FIG. 8A  may be a machining tool  801  including the tip  820  which does not have a directionality. According to certain embodiments, the tip  820  may be symmetrically formed on the machining body  810  such that the tip  820  does not have a directionality with respect to a moving direction of the machining tool  801 . For example, as illustrated in  FIG. 8A , the tip  820  may be formed in a conical shape. In a case where the tip  820  of the machining tool  801  does not have a directionality, it may be possible to form a first mold pattern (e.g., the first mold pattern  610  of  FIG. 6A ) and a second mold pattern (e.g., the second mold pattern  620  of  FIG. 6A ), by relatively moving the machining tool  801  with respect to a first mold core (e.g., the first mold core  600  of  FIG. 6A ) by using a moving device having a simple degree of freedom of movement. In the case, the moving device may not move a first mold core and may move only the machining tool  801 , to continuously form a first mold pattern and a second mold pattern on a first mold core. 
     According to certain embodiments, as illustrated in  FIG. 8B , the machining tool  802  may include the machining body  830  and the tip  840  formed eccentrically in a direction thereof with respect to the machining body  830 . In the case, the tip  840  of the machining tool  802  may have a directionality with respect to a moving direction of the machining tool  802 . The machining direction of the machining tool  802  having such the shape may be determined. There may be a case that the case where such the machining tool  802  should use a moving device having a somewhat complex degree of freedom of movement rather than the case where a machining tool (e.g., the machining tool  801  of  FIG. 8A ), which does not have a directionality, is used. 
       FIG. 9  is a view illustrating a method for manufacturing a cover plate according to various embodiments disclosed in the disclosure. 
     In the following description, the same reference number are used to refer to the same or similar components as those described above. 
     The first mold pattern  610  and the second mold pattern  620  may be continuously formed in the first region  601  and the second region  602  of the first mold core  600 , respectively. The first mold pattern and the second mold pattern may be formed on the first mold core  600  using the tip  720  of the machining tool  700  ( 901 ). For the detailed description of the process of forming the first mold pattern and the second mold pattern on the first mold core  600 , refer to the descriptions of  FIGS. 7A, 7B and 8 . 
     Injection molding may be performed by injecting an injection product between the first mold core  600  and the second mold core  532  ( 902 ). The injection-molded product injected between the first mold core  600  and the second mold core  532  may be the cover plate  200 . 
     In the injection molding process, the first pattern  210  may be formed in the first region  201  of the cover plate  200  by the first pattern  210  formed on the first mold core  600 , and the second pattern  220  may be formed in the second region  202  of the cover plate  200  by the second pattern  220  formed on the first mold core  600  ( 903 ). 
     Meanwhile, in the above, it is described that a first mold pattern (e.g., the first mold pattern  610  of  FIG. 6A ) and a second mold pattern (e.g., the second mold pattern  620  of  FIG. 6A ) is formed on a first mold core (e.g., the first mold core  600  of  FIG. 6A ), but three types of mold patterns or more may be formed on a first mold core. For example, in a case where a cover plate is manufactured using a first mold core including three types of mold patterns, as illustrated in  FIG. 3 , the cover plate  300  including three types of patterns (e.g., the first pattern  310 , the second pattern  320 , and the third pattern  330  of  FIG. 3 ) may be manufactured. 
     A cover plate of an electronic device according to certain embodiments disclosed in the disclosure may include a first pattern formed in a first region of the cover plate and a second pattern formed in a second region of the cover plate, wherein the first pattern has a first flat part and a first protrusion part configured to protrude at predetermined height with respect to the first flat part, the first flat part and the first protrusion part being repeatedly arranged, the second pattern has a second flat part and a second protrusion part configured to protrude at predetermined height with respect to the second flat part, the second flat part and the second protrusion part being repeatedly arranged, and the first flat part of the first pattern and the second flat part of the second pattern are continuously joined to each other at a portion at which the first pattern and the second pattern are connected. 
     In addition, the first pattern may be a pattern including a curved-line, and the second pattern may be a pattern including a straight-line. 
     In addition, a height of the first protrusion part of the first pattern and a height of the second protrusion part of the second pattern may be different from each other. 
     In addition, a height of the first protrusion part of the first pattern may be 1 μm to 3 μm inclusive, and a height of the second protrusion part of the second pattern may be 1 μm to 3 μm inclusive. 
     In addition, a height of the first protrusion part of the first pattern may be 3 μm to 10 μm inclusive, and a height of the second protrusion part of the second pattern may be 3 μm to 10 μm inclusive. 
       FIG. 9  described a method according to certain embodiments of the disclosure. At operation  905 , (see  FIG. 7A ) a tip  720  of a machining tool  700  forms a first mold pattern  610  and a second mold pattern  620  on first and second regions  601 ,  602 , respectively of a first mold core  600 . 
     The first and second mold patterns  610  and  620  can be formed by moving the tip  720  of the machining tool  700  or by hitting the portions of the first mold core  600 . 
     The first mold pattern  610  can have a first depth with respect to a reference surface of the first mold core  600  and the second mold pattern  620  can have a second depth with respect to the reference surface of the first mold core  600 , wherein the first depth and the second depth are different from each other. 
     In certain embodiments, the first mold pattern and the second mold pattern have a depth of 1 μm to 3 μm inclusive with respect to the reference surface. 
     At operation  910 , a polymer material is injected between the first mold core  600  and a second mold core  532 . 
     As a result, a cover plate for an electronic device  200  is formed at operation  915 , having a first pattern  210  formed from the first mold pattern  610  in a first region  201  of the cover plate  200  (operation  920 ), and a second pattern  220  formed from the second mold pattern  620  in a second region  202  of the cover plate  200  (operation  925 ). 
     According to certain embodiments, a cover plate of an electronic device, comprises: a first pattern formed in a first region of the cover plate; and a second pattern formed in a second region of the cover plate, wherein the first pattern has a first flat part and a first protrusion part protruding at a first height with respect to the first flat part, the first flat part and the first protrusion part being repeatedly arranged, the second pattern has a second flat part and a second protrusion part protruding at a second height with respect to the second flat part, the second flat part and the second protrusion part being repeatedly arranged, and the first flat part of the first pattern and the second flat part of the second pattern are continuously joined to each other at a portion at which the first pattern and the second pattern are connected. 
     According to certain embodiments the first pattern is a pattern comprising a curved-line, and the second pattern is a pattern comprising a straight-line. 
     According to certain embodiments, the first height and the second height are different from each other. 
     According to certain embodiments, the first height is between 1 μm to 3 μm, and the second height is between 1 μm to 3 μm. 
     According to certain embodiments, the first height is between 3 μm to 10 μm, and the second height is between 3 μm to 10 μm. 
     According to certain embodiments, a method comprises forming a cover plate on an electronic device by molding a polymer material using a first mold core and a second mold core, forming a first pattern using a first mold pattern in a first region of one surface of a first mold core, and forming a second pattern using a second mold pattern in a second region of the one surface of the first mold core. 
     According to certain embodiments, forming the cover plate comprises injecting the polymer material between the first mold core and the second mold core. 
     According to certain embodiments, the method further comprises continuously forming the first mold pattern and the second mold pattern using a same machining tool. 
     According to certain embodiments, forming the first mold pattern and the second mold pattern further comprises: moving a tip of the same machining tool to press a portion of the first region of the one surface of the first mold core, and moving the tip of the same machining tool to press a portion of the second region of the one surface of the first mold core. 
     According to certain embodiments, the first mold pattern has a first depth with respect to a reference surface of the first mold core and the second mold pattern has a second depth with respect to the reference surface of the first mold core, wherein the first depth and the second depth are different from each other. 
     According to certain embodiments, the first mold pattern and the second mold pattern have a depth of 1 μm to 3 μm inclusive with respect to a reference surface. 
     According to certain embodiments, the pressed portion of the first portion is more compressed than an unpressed portion of the first portion, and the pressed portion of the second region is more compressed than an unpressed portion of the second portion. 
     According to certain embodiments, moving the tip of the same machining tool to press the portion of the first region further comprises pushing material constituting the first mold core out of the pressed portion, and moving a tip of the same machining tool to press the portion of the second region further comprises pushing material constituting the second mold core out of the pressed portion. 
     According to certain embodiments, continuously forming the first mold pattern and the second mold pattern further comprises hitting a portion of the first region of the one surface of the first mold core with a tip of the same machining tool, and hitting a portion of the second region of the one surface of the first mold core with the tip of the same machining tool. 
     According to certain embodiments, the first mold pattern has a first depth with respect to a reference surface of the first mold core and the second mold pattern has a second depth with respect to the reference surface, and wherein the first depth and the second depth are different from each other. 
     According to certain embodiments, the first depth and the second depth are between 3 μm to 10 μm inclusive with respect to the reference surface of the first mold core. 
     According to certain embodiments, the first mold pattern comprises a curved-line, and the second mold pattern is a pattern comprises a straight-line. 
     According to certain embodiments, the same machining tool comprises a machining body and a tip symmetrically formed at an end of the machining body. 
     According to certain embodiments, the tip of the same machining tool has a conical shape at the machining body. 
     According to certain embodiments, the polymer material is a transparent material that is partially transmissive in a coagulated state. 
     Embodiments of the disclosure disclosed in the specification and the drawings are merely specific examples presented to easily describe the technical content according to embodiments of the disclosure and to help understanding of the disclosure, and are not intended to limit the scope of embodiments of the disclosure. Accordingly, it should be interpreted that the scope of certain embodiments of the disclosure includes not only embodiments disclosed herein, but also all changed or modified forms derived based on the technical idea of certain embodiments of the disclosure.