Patent Description:
Design aesthetics increasingly differentiate competing electronic devices to consumers, as these devices become increasingly upscale in specification. As a result, there is impetus to form the external housing of these devices to produce a visually pleasing design with a luxurious texture.

For example, a visually pleasing surface texture may be implemented by disposing a film (e.g., a deco film) on a surface of the housing.

The surface of the housing may be formed having a shape including edges or corners where several different surfaces meet. When a flat-shaped film is bonded to the surface, the film does not adhere evenly at the edges or corners, resulting in a bonding failure such as folding or wrinkles.

In another example, the visual surface texture may be implemented by disposing a patterned layer on a surface of the housing through ultraviolet (UV) molding. However, when the surface of the housing is not flat, and includes edges or corners where several disparate surfaces meet, it may be difficult to perform a uniform rolling application of the molding liquid (e.g., a UV curable resin) to form the layer properly on the surface during UV molding.

An embodiment of the disclosure provides an electronic device including a housing and a method of producing the housing for easily implementing a visual surface texture without a restriction on a surface shape of the housing.

According to an embodiment of the disclosure, an electronic device includes a housing including: a first plate forming a front surface of the housing, a second plate integrally forming a rear surface and side surface of the housing, wherein a space is enclosed between the front surface, side surface and rear surface, and wherein the second plate includes a first surface forming the side and rear surfaces of the housing, and a second surface disposed opposite to the first surface, and a display disposed in the space and at least partially visible through the first plate, wherein at least a portion of the second surface includes a pattern having surface roughness having a height of <NUM> to <NUM>, and wherein the second plate includes a light transmittance rate of <NUM>% to <NUM>%.

According to certain embodiments of the disclosure, an electronic device includes a housing defining a front surface, a rear surface, and a side surface, and a space enclosed between the front surface and the rear surface, wherein the housing includes: a first plate forming the front surface, a second plate forming the rear surface and the side surface, integrally extending from the side surface to the rear surface, wherein the second plate includes a first surface forming the rear surface and a second surface disposed opposite to the first surface, a first layer bonded to the second plate within the space and including at least one pattern, wherein the first layer is disposed at the second surface between the second surface and the second layer, and a second layer bonded to the first layer, the second layer including at least one color; and a display disposed in the space and at least partially visible through the first plate, wherein at least a portion of the second surface includes a pattern having surface roughness having a height of <NUM> to <NUM>.

According to an embodiment of the disclosure, by forming a pattern having surface roughness having a height of about <NUM> to <NUM> at the surface of the housing, a visual surface texture can be implemented using a diffraction phenomenon without a restriction on a surface shape and without a film or a UV molding layer having a fine pattern.

In addition, effects obtained or predicted by certain embodiments of the disclosure will be disclosed either directly or implicitly in the detailed description of the embodiments of the disclosure. For example, various effects predicted according to certain embodiments of the disclosure will be disclosed within the detailed description to be described later.

In the drawings, the same or similar reference numerals may be used for the same or similar components.

The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of certain 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 mere examples. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the certain embodiments described herein can be made without departing from the disclosure. In addition, descriptions of well-known functions and implementations are omitted for clarity and conciseness.

Accordingly, it should be apparent to those skilled in the art that the following description of certain 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.

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). 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.

An electronic device according to an embodiment may be one of various types of electronic devices. The electronic device may include a portable communication device (e.g., a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. However, the electronic device is not limited to any of those described above.

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

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

Referring to <FIG>, according to an embodiment, an electronic device <NUM> may include a housing <NUM> that includes a front surface 110A, a rear surface 110B, and a lateral surface 110C that surrounds a space between the front surface 110A and the rear surface 110B. According to another embodiment, the housing <NUM> may refer to a structure that forms at least a part of the front surface 110A, the rear surface 110B, and the lateral surface 110C.

According to an embodiment, the front surface 110A may be formed of a first plate (or front plate) <NUM> (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 first plate <NUM> may be referred to the term "first housing part".

According to an embodiment, the rear surface 110B and the side surface 110C may be formed by the second plate <NUM>. For example, the second plate <NUM> may be extended integrally from the rear surface 110B to the side surface 110C. The second plate <NUM> may include a first surface <NUM> including the rear surface 110B and the side surface 110C, and a second surface (not illustrated) disposed opposite to the first surface <NUM>. Various layers may be disposed at the second surface. At least one of the various layers disposed at the second surface may be made of an opaque material to cover the inside of the electronic device <NUM>. In the following description, the second plate <NUM> may also be referred to as a "second housing portion".

According to an embodiment, the electronic device <NUM> may include at least one of a display <NUM>, audio modules <NUM>, <NUM> and <NUM>, sensor module <NUM>, camera modules <NUM>, <NUM> and <NUM>, key input devices <NUM>, and connector holes <NUM> and <NUM>. In certain embodiments, the electronic device <NUM> may omit at least one (e.g., the key input devices <NUM>) of the above components, or may further include other components (e.g., a fingerprint sensor or a light emitting device).

The display <NUM> may be exposed through a substantial portion of the front plate <NUM>, for example. In certain embodiments, outlines (i.e., edges and corners) of the display <NUM> may have substantially the same form as those of the first plate <NUM>. In another embodiment (not shown), the spacing between the outline of the display <NUM> and the outline of the first plate <NUM> may be substantially unchanged in order to enlarge the exposed area of the display <NUM>.

In another embodiment (not shown), a recess or opening may be formed in a portion of a display area of the display <NUM> to accommodate or to be aligned with at least one of audio modules (e.g., the audio module <NUM>), sensor module (e.g., the sensor module <NUM>), and camera modules (e.g., the camera module <NUM>). In another embodiment (not shown), at least one of the audio modules (e.g., the audio module <NUM>), the sensor modules (e.g., the sensor module <NUM>), and the camera modules (e.g., the camera module <NUM>) may be disposed on the back of the display area of the display <NUM>. In another embodiment (not shown), the display <NUM> 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.

The audio modules <NUM>, <NUM> and <NUM> may correspond to a first audio module <NUM>, a second audio module <NUM>, and a third audio module <NUM>. The first audio module <NUM> may include a microphone for acquiring external sounds and a microphone hole of the housing <NUM> corresponding to the microphone. In certain embodiments, the first audio module <NUM> may include a plurality of microphones to sense a sound direction. The second audio module <NUM> may include an external speaker and a speaker hole of the housing <NUM> corresponding to the external speaker. The third audio module <NUM> may include a call speaker (e.g. a call receiver) and a speaker hole of the housing <NUM> corresponding to the call speaker. 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 a speaker hole.

The sensor module <NUM> may generate electrical signals or data corresponding to an internal operating state of the electronic device <NUM> or to an external environmental condition. The sensor module <NUM> may include, for example, a proximity sensor that generate signals of a proximity of an external object based on lights that pass through a part of the front surface 110A of the housing <NUM>. In certain embodiments, the sensor module <NUM> may include a biometric sensor, such as a fingerprint sensor, that generate signals of biometric data based on lights that pass through a part of the front surface 110A of the housing <NUM>. In certain embodiments, the fingerprint sensor may be disposed on the back of the display area of the display <NUM>. In certain embodiments (not shown), the electronic device <NUM> may include another sensor module, such as a heart rate monitor (HRM) sensor or a fingerprint sensor, disposed on the rear surface 110B of the housing <NUM>. The electronic device <NUM> 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 (e.g., the sensor module <NUM>).

The camera modules <NUM>, <NUM> and <NUM> may include a first camera device (e.g., the camera module <NUM>), a second camera device (e.g., the camera module <NUM>), and/or a flash (e.g., the camera module <NUM>). The first camera device may generate image signals based on lights that pass through a part of the front surface 110A of the housing <NUM>. The second camera device and the flash may be disposed on the rear surface 110B of the housing <NUM>. The camera module <NUM> or the camera module <NUM> 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 <NUM>.

The key input devices <NUM> may be disposed on the lateral surface 110C of the housing <NUM>. In another embodiment, the electronic device <NUM> may not include some or all of the key input devices <NUM> described above, and the key input devices <NUM> which are not included may be implemented in another form such as a soft key on the display <NUM>. In certain embodiments, the key input devices <NUM> may include a sensor module (not shown) disposed on the rear surface 110B of the housing <NUM>.

The light emitting device (not shown) may be disposed on the front surface 110A of the housing <NUM>, for example. For example, the light emitting device may provide status information of the electronic device <NUM> in an optical form. In certain embodiments, the light emitting device may provide a light source associated with the operation of the camera module <NUM>. The light emitting device may include, for example, a light emitting diode (LED), an infrared (IR) LED, or a xenon lamp.

The connector holes <NUM> and <NUM> may include a first connector hole (e.g., the connector hole <NUM>) 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 <NUM>) adapted for a connector (e.g., an earphone jack) for transmitting and receiving an audio signal to and from an external electronic device.

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

With reference to <FIG>, according to an embodiment, the electronic device <NUM> may include a first plate (or first housing portion) <NUM>, second plate (or second housing portion) <NUM>, first support member <NUM> (e.g., bracket), display <NUM>, first substrate assembly <NUM>, second substrate assembly <NUM>, battery <NUM>, second support member <NUM>, third support member <NUM>, or antenna structure <NUM>. In some embodiments, the electronic device <NUM> may omit at least one (e.g., the first support member <NUM>, the second support member <NUM>, or the third support member <NUM>) of the components or may additionally include other components. At least one of the components of the electronic device <NUM> may be the same as or similar to at least one of the components of the electronic device <NUM> of <FIG>, and repeated descriptions thereof will be omitted below.

The first support member <NUM> may be, for example, disposed inside the electronic device <NUM> to be connected to the second plate <NUM>. The first support member <NUM> may be made of, for example, a metal material and/or a non-metal (e.g., polymer) material.

The display <NUM> may be, for example, coupled to one surface of the first support member <NUM> and be disposed between the first support member <NUM> and the first plate <NUM>. The first substrate assembly <NUM> and the second substrate assembly <NUM> may be, for example, coupled to the other surface of the first support member <NUM> and be interposed between the first support member <NUM> and the second plate <NUM>.

According to an embodiment, the first substrate assembly <NUM> may include a first printed circuit board (PCB). The display <NUM> or the first camera device <NUM> may be electrically connected to the first printed circuit board through various electrical paths such as a flexible printed circuit board (FPCB). The first substrate assembly <NUM> may include various electronic components electrically connected to the first printed circuit board. An electronic component may be disposed at the first printed circuit board or may be electrically connected to the first printed circuit board through an electrical path such as a cable or an FPCB.

According to certain embodiments, the first substrate assembly <NUM> may include a main PCB, a slave PCB disposed to partially overlap with the main PCB, and an in-terposer substrate between the main PCB and the slave PCB, when viewed from above the first plate <NUM>.

According to an embodiment, when viewed from above the first plate <NUM>, the second substrate assembly <NUM> may be disposed to be spaced apart from the first substrate assembly <NUM> with the battery <NUM> interposed therebetween. The second substrate assembly <NUM> may include a second printed circuit board electrically connected to the first printed circuit board of the first substrate assembly <NUM>. The second substrate assembly <NUM> may include various electronic components electrically connected to the second printed circuit board. An electronic component may be disposed at the second printed circuit board or may be electrically connected to the second printed circuit board through an electrical path such as a cable or an FPCB. According to an embodiment, the electronic component may include a USB connector using the first connector hole <NUM>, an earphone jack using the second connector hole <NUM>, a microphone using the microphone hole <NUM>, or a speaker using a speaker hole <NUM>.

According to an embodiment, the battery <NUM> may be disposed between the first support member <NUM> and the second plate <NUM>, and be coupled to the first support member <NUM>. The battery <NUM> is a device for supplying power to at least one component of the electronic device <NUM>, and may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell. At least a portion of the battery <NUM> may be, for example, disposed on substantially the same plane as that of a first printed circuit board of the first substrate assembly <NUM> or a second printed circuit board of the second substrate assembly <NUM>. The battery <NUM> may be integrally disposed inside the electronic device <NUM> or may be disposed detachably from the electronic device <NUM>.

According to an embodiment, the second support member <NUM> may be disposed between the first support member <NUM> and the second plate <NUM> and be coupled to the first support member <NUM> through a fastening element such as a bolt. At least a portion of the first substrate assembly <NUM> may be disposed between the first support member <NUM> and the second support member <NUM>, and the second support member <NUM> may cover the first substrate assembly <NUM> for protection.

According to an embodiment, when viewed from above the first plate <NUM>, the third support member <NUM> may be disposed to be spaced apart from the second support member <NUM> with the battery <NUM> interposed therebetween. The third support member <NUM> may be disposed between the first support member <NUM> and the second plate <NUM>, and be coupled to the first support member <NUM> through a fastening element such as a bolt. At least a portion of the second substrate assembly <NUM> may be disposed between the first support member <NUM> and the third support member <NUM>, and the third support member <NUM> may cover the second substrate assembly <NUM> for protection.

According to an embodiment, the second support member <NUM> and/or the third support member <NUM> may be made of a metal material and/or a non-metal material (e.g., polymer). According to certain embodiments, the second support member <NUM> and/or the third support member <NUM> may be referred to as a rear case.

According to an embodiment, the antenna structure <NUM> may be disposed between the second support member <NUM> and the second plate. The antenna structure <NUM> may be implemented in the form of a film such as an FPCB. According to an embodiment, the antenna structure <NUM> may include at least one conductive pattern used as a loop type radiator. For example, the at least one conductive pattern may include a planar spiral conductive pattern (e.g., planar coil or pattern coil).

According to an embodiment, the conductive pattern of the antenna structure <NUM> may be electrically connected to a wireless communication circuit disposed at the first substrate assembly <NUM>. The conductive pattern may be used for short-range wireless communication such as near field communication (NFC). The conductive pattern may be used for magnetic secure transmission (MST) for transmitting and/or receiving a magnetic signal.

According to certain embodiments, the conductive pattern of the antenna structure <NUM> may be electrically connected to a power transmission and reception circuit disposed at the first substrate assembly <NUM>. The power transmission and reception circuit may wirelessly receive power from an external electronic device through a conductive pattern or may wirelessly transmit power to the external electronic device. The power transmission and reception circuit may include, for example, a power management integrated circuit (PMIC) or a charger integrated circuit (IC), and charge the battery <NUM> using power received through a conductive pattern.

According to an embodiment, the display <NUM> may include an opening <NUM> formed in at least a partial area corresponding to an optical sensor (e.g., the first camera device <NUM> or the biometric sensor) disposed inside the electronic device <NUM>. The opening <NUM> may be formed as, for example, a notch shape. According to some embodiments, the opening <NUM> may be implemented in the form of a through hole. The optical sensor may receive external light through the opening <NUM> of the display <NUM> and a partial area of the first plate <NUM> aligned therewith. According to certain embodiments (not illustrated), the opening <NUM> of the display <NUM> may be replaced with a substantially transparent area formed by changing a pixel structure and/or a wiring structure.

According to an embodiment, the second plate <NUM> may include a microphone hole <NUM>, a speaker hole <NUM>, or connector holes <NUM> and <NUM>. According to an embodiment, the second plate <NUM> may include openings <NUM> for disposing to expose the second camera device <NUM> and the flash <NUM> included in the first substrate assembly <NUM> at the rear surface 110B. According to an embodiment, the second plate <NUM> may include openings <NUM> for disposing the key input devices <NUM>.

According to an embodiment, the second plate <NUM> may include a first surface <NUM> (see <FIG>) including the rear surface 110B and the side surface 110C and a second surface <NUM> disposed opposite to the first surface <NUM>. The second surface <NUM> may be formed in a shape along the first surface <NUM> and include, for example, a portion 110D along the rear surface 110B and a portion 110E along the side surface 110C.

According to an embodiment, a fine pattern may be formed in the second surface <NUM> or inside the second plate <NUM> close to the second surface <NUM>. The fine pattern may separate a spectrum of light according to a wavelength by a diffraction phenomenon of light. The second plate <NUM> may enable viewing of monochromatic lights of visible light through the fine pattern. The second plate <NUM> may further include one or more layers stacked on the second surface <NUM> to provide a visual effect.

According to some embodiments (not illustrated), the housing <NUM> may include a rear plate forming the rear surface 110B and a side bezel structure (or side member) forming the side surface 110C instead of the second plate <NUM>. According to certain embodiments, the rear plate and the side bezel structure may include a fine pattern that enables viewing of monochromatic lights of visible light through a spectrum.

<FIG> is a flowchart illustrating a production flow <NUM> of a cover according to an embodiment. <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, <FIG> are diagrams illustrating the production flow <NUM> of <FIG> according to an embodiment.

With reference to <FIG>, according to an embodiment, in operation <NUM>, a pattern may be formed at a molding surface of a die, the pattern having surface roughness having a height of about <NUM> (micrometer) or less. For example, the surface roughness may be determined as a maximum average roughness, in which a maximum height Rmax from a lowest point to a highest point is about <NUM> or less. According to an embodiment, a molding surface of the die may include a pattern having surface roughness of about <NUM> to <NUM>. The molding surface of the die is a surface on which a molten resin contacts during injection molding, and may form an outer surface of a mold-injected structure. In operation <NUM>, a structure for the housing of the electronic device may be injection molded through the die (e.g., the die <NUM> of <FIG>). According to an embodiment, in operation <NUM>, post-processing of a structure mold-injected through the die may be performed.

<FIG> and <FIG> are cross-sectional views illustrating a die <NUM> according to an embodiment.

With reference to <FIG> and <FIG>, for example, the die <NUM> may include a first template <NUM>, a second template <NUM>, or a core block (or core) <NUM>.

According to an embodiment, the first template <NUM> may be a mold base including a cavity in which a molten resin may flow. For example, the first template <NUM> may be a fixed bolster plate or a cavity plate. The first template <NUM> may include the cavity, which is an empty space in the form of a hollow in a direction from the second template <NUM> toward the first template <NUM> (e.g., +z axis direction). According to certain embodiments (not illustrated), a cavity block including a cavity may be disposed at the first template <NUM> instead of a structure of forming a cavity in the first template <NUM>.

According to an embodiment, the second template <NUM> may be a mold base in which the core block <NUM> is disposed. For example, the second template <NUM> may be a moving bolster plate or a core plate. The core block <NUM> may form a molding space <NUM> together with the cavity of the first template <NUM>.

The mold-injected structure (not illustrated) may include, for example, a first surface and a second surface disposed opposite to the first surface. According to an embodiment, the first template <NUM> may include a first molding surface <NUM> forming a part of the cavity, and the first molding surface <NUM> may serve to form a part of the first surface of the mold-injected structure. According to an embodiment, the second template <NUM> may include a second molding surface <NUM> forming a part of the cavity, and the second molding surface <NUM> may serve to form a part of the first surface of the mold-injected structure. The second molding surface <NUM> may be disposed along an edge of the first molding surface <NUM>. According to an embodiment, the core block <NUM> may include a third molding surface <NUM> that serves to form a second surface of a mold-injected structure. The molding space <NUM> may be formed by the first molding surface <NUM>, the second molding surface <NUM>, and the third molding surface <NUM>. According to certain embodiments, the die is not limited to the embodiment of <FIG> and <FIG>, and may be implemented in various other structures to form the molding space <NUM>.

According to an embodiment, a fine pattern (e.g., uneven surface) may be formed at the third molding surface <NUM> of the core block <NUM>. <FIG> illustrates a second template <NUM> and a core block <NUM> of the die <NUM> according to an embodiment. With reference to <FIG>, a fine pattern formed at the third molding surface <NUM> of the core block <NUM> may separate a spectrum of light according to a wavelength by a diffraction phenomenon of light. For example, when viewing the third molding surface <NUM>, monochromatic lights of visible light may be viewed through the fine pattern. According to an embodiment, the structure mold-injected through the die <NUM> of <FIG> may have a pattern in which the third molding surface <NUM> of the core block <NUM> is imprinted and enables viewing of monochromatic lights of visible light by separating a spectrum of light according to a wavelength by a diffraction phenomenon of light.

With reference to <FIG>, the die <NUM> may include, for example, a runner <NUM>, which is a flow passage between a sprue bush (e.g., a die inlet device for injecting a molten resin) (not illustrated) and the molding space <NUM>. The die <NUM> may include, for example, a gate <NUM>, which is an inlet that enables a molten resin to flow from the runner <NUM> to the molding space <NUM>. During injection molding, the molten resin may enter into the molding space <NUM> through the sprue bush, the runner <NUM>, and the gate <NUM>. The gate <NUM> and/or the runner <NUM> may be formed, for example, in a space between the first template <NUM> and the second template <NUM> in a closed state of the die <NUM>, as illustrated in <FIG> and <FIG>. According to certain embodiments, the position, number, or shape of gates or runners is not limited to the embodiment of <FIG> and may be various.

With reference to <FIG>, in an embodiment, when viewed in an x-z cross-section, the molding space <NUM> may include a flat space <NUM> and a first curved space <NUM> and a second curved space <NUM> connected to the flat space <NUM> and disposed at both sides with the flat space <NUM> interposed therebetween. With reference to <FIG>, in an embodiment, when viewed in a y-z cross-section, the molding space <NUM> may include a third curved space <NUM> and a fourth curved space <NUM> connected to the flat space <NUM> and disposed at both sides with the flat space <NUM> interposed therebetween. The first curved space <NUM>, the second curved space <NUM>, the third curved space <NUM>, and the fourth curved space <NUM> may be curved in a -z axis direction. When viewed in an x-y plane, the first curved space <NUM> and the second curved space <NUM> may be extended parallel to each other. When viewed in the x-y plane, the third curved space <NUM> and the fourth curved space <NUM> may be extended parallel to each other. The first curved space <NUM> may connect one end of the third curved space <NUM> and one end of the fourth curved space <NUM>, and the second curved space <NUM> may connect the other end of the third curved space <NUM> and the other end of the fourth curved space <NUM>. According to certain embodiments (not illustrated), the molding space <NUM> may include a curved corner space connecting the first curved space <NUM> and the third curved space <NUM>, a curved corner space connecting the first curved space <NUM> and the fourth curved space <NUM>, a curved corner space connecting the second curved space <NUM> and the third curved space <NUM>, and a curved corner space connecting the second curved space <NUM> and the fourth curved space <NUM>. According to certain embodiments, when viewed in an x-z cross-section, the first curved space <NUM> and the second curved space <NUM> may be at least partially symmetrical to each other with the flat space <NUM> interposed therebetween. According to certain embodiments, when viewed in a y-z cross-section, the third curved space <NUM> and the fourth curved space <NUM> may be at least partially symmetrical to each other with the flat space <NUM> interposed therebetween.

With reference to <FIG>, in an embodiment, the gate <NUM> may be implemented in the form of a side gate disposed at a die parting line <NUM>. For example, the gate <NUM> may be disposed next to the molding space <NUM> on the die parting line <NUM>. The die parting line <NUM> may indicate a portion in which the first template <NUM> and the second template <NUM> are divided so that the mold-injected structure may be taken out by opening the die <NUM>. According to an embodiment, the die parting line <NUM> may be positioned to correspond to the curved spaces <NUM>, <NUM>, <NUM>, and <NUM>. For example, the die parting line <NUM> may be positioned so that one surface of the curved spaces <NUM>, <NUM>, <NUM>, and <NUM> may be formed by the first molding surface <NUM> of the first template <NUM> and the second molding surface <NUM> of the second template <NUM>. The die parting line <NUM> and the gate <NUM> related thereto according to the embodiment of <FIG> prevent the die <NUM> from having a locking structure such as an undercut; thus, the mold-injected structure may be taken out from the die <NUM>.

According to an embodiment, a molten resin may be injected into the molding space <NUM> in a state in which the die <NUM> is closed, as illustrated in <FIG> and <FIG>. The molten resin occupying the molding space may be solidified by circulating cooling water through the die <NUM>. After the solidification, when the second template <NUM> is transferred and the die <NUM> is opened, the mold-injected structure may be disposed at the core block <NUM>. The mold-injected structure may include an extension portion formed through the gate <NUM>. When an ejector pin pushes the extension portion, the mold-injected structure may be separated from the core block <NUM>. When a part of the third molding surface <NUM> is implemented as a part of the ejector pin, the pattern imprinted in the structure may be damaged by pressing one surface (the surface in which the pattern of the third molding surface <NUM> is imprinted) of the structure in which the ejector pin is mold-injected. When a part of the third molding surface <NUM> is implemented as a part of the ejector pin, polishing may be performed so that the surface of the ejector pin may be smoothly connected to a peripheral surface area of the third molding surface <NUM>. The pattern formed in the third molding surface <NUM> may be damaged by the polishing. The gate <NUM> in the form of a side gate and a structure related thereto according to an embodiment may enable the structure to be easily taken out of the die <NUM> without damage to a pattern formed in the mold-injected structure.

According to certain embodiments, the gate <NUM> may be formed as a fan gate. For example, when viewed in the -z axis direction, the fan gate is a gate in a form in which a portion connected to the molding space <NUM> is widened, and a flow tip thereof may be formed to be wide and uniform. The fan gate may reduce molding defects when the structure is mold-injected through the molding space <NUM> of a form having the flat space <NUM> and the curved spaces <NUM>, <NUM>, <NUM>, and <NUM>. With reference to <FIG>, the second template <NUM> may include one side space <NUM> of the gate <NUM>. The one side space <NUM> may have a shape in which a width in the y-axis direction increases toward a portion connected to the molding space <NUM>.

<FIG> is a cross-sectional view illustrating a pattern formed at a third molding surface <NUM> of a core block <NUM> according to an embodiment.

With reference to <FIG>, in an embodiment, a pattern <NUM> (e.g., uneven surface) including a plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> may be formed at the third molding surface <NUM> of the core block <NUM>. The dimples may refer to recessed grooves. According to certain embodiments, dimples may be referred to by other terms of the same level, such as a pit or a recess. According to an embodiment, the dimple may separate a spectrum of light according to a wavelength by a diffraction phenomenon of light. According to certain embodiments, the plurality of dimples may be arranged in various directions along at least a portion of the third molding surface <NUM>.

According to an embodiment, the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> may have substantially the same shape. For example, when viewed in cross-section, the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> may include a concave round space or a hemispherical space. For example, diameters A1, A2, A3, and A4 of the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> may be substantially the same. For example, when viewed in cross-section, depths H1, H2, H3, and H4 of the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> may be substantially the same. According to certain embodiments, gaps G1, G2, and G3 in which the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> are arranged may be substantially the same.

In certain embodiments (not illustrated), some of the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> and other dimples may be formed in different shapes. For example, some of the diameters A1, A2, A3, and A4 of the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> may be different from others. For example, some of the depths H1, H2, H3, and H4 of the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> may be different from others. For example, a cross-sectional shape of some of the plurality of dimples and a cross-sectional shape of others thereof may be different from each other.

According to certain embodiments (not illustrated), when viewed in cross-section, the plurality of dimples are not limited to a round space or a hemispherical space, and may be implemented in various other cross-sectional shapes.

<FIG> are cross-sectional views illustrating patterns formed at a third molding surface <NUM> of a core block <NUM> according to certain embodiments.

With reference to <FIG>, in certain embodiments, a plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> of a pattern <NUM> formed at the third molding surface <NUM> of the core block <NUM> may each be a rectangle when viewed in cross-section. With reference to <FIG>, in certain embodiments, a plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> of a pattern <NUM> formed at the third molding surface <NUM> of the core block <NUM> may each be a trapezoid when viewed in cross-section. With reference to <FIG>, in certain embodiments, a plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> of a pattern <NUM> formed at the third molding surface <NUM> of the core block <NUM> may each be a triangle when viewed in cross-section. According to certain embodiments, the plurality of dimples may be formed in various other cross-sectional shapes.

According to certain embodiments (not illustrated), the pattern formed at the third molding surface <NUM> of the core block <NUM> may be implemented in a form different from that of the plurality of dimples illustrated in <FIG>, <FIG>.

<FIG> is a diagram illustrating a third molding surface <NUM> including a pattern <NUM> according to certain embodiments. With reference to <FIG>, the pattern <NUM> may include a plurality of slits <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> arranged at intervals. According to certain embodiments, when viewed in a cross-section taken along line A-A' in <FIG>, the slit <NUM>, <NUM>, <NUM>, <NUM>, or <NUM> may have various cross-sectional shapes such as a rectangle, a trapezoid, or a triangle.

With reference to <FIG>, in an embodiment, the third molding surface <NUM> of the core block <NUM> may have surface roughness having a height of about <NUM> or less by the pattern <NUM>. For example, the depths H1, H2, H3, and H4 of the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> may be formed in about <NUM> or less. In certain embodiments, with reference to <FIG>, depths H11, H12, H13, and H14 of the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> are formed in about <NUM> or less, and the third molding surface <NUM> of the core block <NUM> may have surface roughness having a height of about <NUM> or less. In certain embodiments, with reference to <FIG>, depths H21, H22, H23, and H24 of the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> are formed in about <NUM> or less, and the third molding surface <NUM> of the core block <NUM> may have surface roughness having a height of about <NUM> or less. In certain embodiments, with reference to <FIG>, when depths H31, H32, H33, and H34 of the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> are formed in about <NUM> or less, the third molding surface <NUM> of the core block <NUM> may have surface roughness having a height of about <NUM> or less. In certain embodiments, with reference to <FIG>, the depths of the plurality of slits <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> are formed in about <NUM> or less; thus, the third molding surface <NUM> of the core block <NUM> may have surface roughness having a height of about <NUM> or less.

According to an embodiment, the pattern <NUM> of <FIG>, the pattern <NUM> of <FIG>, the pattern <NUM> of <FIG>, the pattern <NUM> of <FIG>, or the pattern <NUM> of <FIG> may be formed by using a laser having a pulse width less than or equal to a preset or specified value (e.g., an interval of a time at which an amplitude becomes <NUM>/<NUM> in a rise time and a fall time of the pulse). When the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> of <FIG>, the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> of <FIG>, and the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> of <FIG>, or the plurality of slits <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> of <FIG> are processed using a laser having a pulse width equal to or less than the preset or specified value, occurrence of burrs may be reduced. The burr may be, for example, a residue remaining in a protruding shape around dimples or slits after forming the dimples or slits. Because the pulse width equal to or less than the preset or specified value is shorter than a heat propagation time of a material forming the core block <NUM>, thermal damage or structural change of the material may not be caused, thereby reducing occurrence of the burr. A laser may be radiated to the core block <NUM> within an extremely short time, such as a pulse width equal to or less than the preset or specified value; thus, a heat diffusion phenomenon may be reduced to reduce occurrence of the burr.

According to an embodiment, a laser having a pulse width less than or equal to the preset or specified value may include a femto second laser. The femto second laser may refer to a laser having a pulse width having "ultrashort" pulses, less than a picosecond, and defined in the domain of femtoseconds (<NUM>-<NUM> seconds). When the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> of <FIG>, the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> of <FIG>, the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> of <FIG>, or the plurality of slits <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> of <FIG> are formed using a femtosecond laser, generation of burrs may be reduced. When a pattern is formed using a laser having a pulse width equal to or less than the preset or specified value, residues may be generated around the dimples or slits, but such residues may be in the form of fine powder that may be easily removed by washing.

<FIG> is a diagram illustrating a dimple <NUM> formed at the third molding surface <NUM> of <FIG> using a laser having a pulse width equal to or less than a preset or specified value according to an embodiment.

With reference to <FIG>, when a dimple <NUM> is formed using a laser (e.g., femtosecond laser) having a pulse width equal to or less than a preset or specified value, residuals such as burrs may be prevented from formation in a peripheral portion <NUM> of the dimple <NUM>.

According to an embodiment, when a laser (e.g., femtosecond laser) having a pulse width equal to or less than a preset or specified value is used, burrs are prevented from forming at the third molding surface <NUM> of the core block <NUM> illustrated in <FIG>, and a pattern having surface roughness having a height of about <NUM> or less may be formed. One surface of the structure mold-injected through the die <NUM> of <FIG> may have a pattern in which the third molding surface <NUM> of the core block <NUM> is imprinted. One surface in which the pattern is disposed in the mold-injected structure may have surface roughness having a height of about <NUM> or less to correspond to the pattern of the third molding surface <NUM>. For example, the surface roughness may be the maximum value average roughness in which a maximum height Rmax from a lowest point to a highest point is about <NUM> or less. According to an embodiment, in the mold-injected structure, one surface in which the pattern is disposed may have surface roughness of about <NUM> to <NUM>. In the mold-injected structure, one surface in which the pattern is disposed separates a spectrum of light according to a wavelength by a diffraction phenomenon of light to enable viewing of monochromatic lights of visible light.

For example, a dimple may be formed at the molding surface of the die using a microsecond laser. Compared with when the dimple <NUM> is formed using a laser (e.g., femtosecond laser) having a pulse width equal to or less than a preset or specified value according to the embodiment of <FIG>, when a dimple is formed using a microsecond laser having a pulse width of microseconds (<NUM>-<NUM> seconds), residues such as burrs may be formed in a periphery of the dimple. According to certain embodiments, even when the dimple is formed using various other lasers having a pulse width greater than a preset or specified value, burrs may be formed at the periphery of the dimple.

According to certain embodiments, a pattern including dimples or slits may be formed at the molding surface of the die using various other methods, but compared with a method of using a laser having a pulse width equal to or less than a preset or specified value, the potential occurrence of burrs may be high.

For example, dimples may be formed at the molding surface of the die using chemical corrosion. Compared with when the dimple <NUM> is formed using a laser (e.g., femtosecond laser) having a pulse width equal to or less than a preset or specified value according to the embodiment of <FIG>, when the dimple is formed using chemical corrosion such as etching, residues such as burrs may be formed at the periphery of the dimple.

For example, dimples may be formed at the molding surface of the die using electrical corrosion. Compared with when the dimple <NUM> is formed using a laser (e.g., femtosecond laser) having a pulse width equal to or less than a preset or specified value according to the embodiment of <FIG>, when a dimple is formed at the molding surface of the die using electrical corrosion such as corrosion by electricity discharging, residues such as burrs may be formed at the periphery of the dimple.

According to an embodiment, when the pattern formed at the third molding surface <NUM> of the core block <NUM> illustrated in <FIG> includes burrs, the pattern imprinted in the mold-injected structure through the die <NUM> of <FIG> may have a shape rendering formation of a spectrum difficult because of the presence of burrs.

With reference to <FIG>, according to an embodiment, in operation <NUM>, a structure for the housing of the electronic device may be injection molded through the die (e.g., the die <NUM> of <FIG>).

The mold-injected structure may include, for example, at least one corner connecting a planar portion (or flat portion) and two curved borders that are not parallel to each other (e.g., forming an acute angle, a right angle, or an obtuse angle) and extended to be bent from the planar portion.

<FIG> is a plan view illustrating a structure <NUM> that is mold-injected through the die illustrated in <FIG>, according to an embodiment.

With reference to <FIG>, in an embodiment, the mold-injected structure <NUM> may include a flat portion <NUM> and a curved border portion <NUM> extending at least partially along an edge of the flat portion <NUM>. With reference to <FIG>, <FIG>, and <FIG>, the flat portion <NUM> may be formed through the flat space <NUM> of the molding space <NUM>. According to an embodiment, a curved border portion <NUM> may include a first curved border <NUM>, a second curved border <NUM> disposed opposite to the first curved border <NUM>, a third curved border <NUM> connecting one end of the first curved border <NUM> and one end of the second curved border <NUM>, or a fourth curved border <NUM> connecting the other end of the first curved border <NUM> and the other end of the second curved border <NUM> and disposed opposite to the third curved border <NUM>. With reference to <FIG>, <FIG>, and <FIG>, the first curved border <NUM> may be formed through the first curved space <NUM> of the molding space <NUM>. The second curved border <NUM> may be formed through the second curved space <NUM> of <FIG>. The third curved border <NUM> may be formed through the third curved space <NUM> of <FIG>. The fourth curved border <NUM> may be formed through the fourth curved space <NUM> of <FIG>. When viewed from above the flat portion <NUM> (e.g., viewed in the z-axis direction), the first curved border <NUM> or the second curved border <NUM> may be substantially orthogonal to the third curved border <NUM> or the fourth curved border <NUM>. For example, when viewed from above the flat portion <NUM>, the first curved border <NUM> may be parallel to the second curved border <NUM>, and the third curved border <NUM> may be parallel to the fourth curved border <NUM>. According to an embodiment, when viewed from above the flat portion <NUM>, a first distance D1 in which the first curved border <NUM> and the second curved border <NUM> are spaced apart from each other may be different from a second distance D2 in which the third curved border <NUM> and the fourth curved border <NUM> are spaced apart from each other. For example, the first distance D1 may be smaller than the second distance D2.

According to an embodiment, the curved border portion <NUM> may include a first corner <NUM> seamlessly connecting the first curved border <NUM> and the third curved border <NUM>. The curved border portion <NUM> may include a second corner <NUM> seamlessly connecting the first curved border <NUM> and the fourth curved border <NUM>. The curved border portion <NUM> may include a third corner <NUM> seamlessly connecting the second curved border <NUM> and the third curved border <NUM>. The curved border portion <NUM> may include a fourth corner <NUM> seamlessly connecting the second curved border <NUM> and the fourth curved border <NUM>.

According to an embodiment, the mold-injected structure <NUM> may include a mark (e.g., parting line (not illustrated)) formed along the die parting line <NUM> because of the die parting line <NUM> of the die <NUM> illustrated in <FIG>. According to an embodiment, the mold-injected structure <NUM> may include an extension portion <NUM> corresponding to the gate <NUM> (e.g., fan gate) of <FIG> disposed along at least a portion of the die parting line. At a cross-section of line B-B', the extension portion <NUM> may be connected to the second curved border <NUM>. According to an embodiment, the extension portion <NUM> may be removed through post-processing.

<FIG> is a plan view illustrating a structure <NUM> mold-injected through a die according to certain embodiments.

The die may include, for example, a space (e.g., auxiliary cavity) connected to the molding space, so as to receive an overflow of the molten resin when the resin is filled into the molding space (e.g., the molding space <NUM> of <FIG> or <FIG>) through a gate. With reference to <FIG>, the structure <NUM> mold-injected through the die may include an extension portion <NUM> of a shape at least partially disposed along the curved border portion <NUM>, when viewed from above the flat portion <NUM> (e.g., viewed in the z-axis direction). The extension portion <NUM> may be made of the molten resin that overflows during injection molding through the die. According to certain embodiments, the die may have an injection molding structure that permits overflow while having a side gate (e.g., fan gate) such as the gate <NUM> of <FIG>. The injection molding method using overflow reduces molding defects when the structure is formed through a molding space (e.g., the molding space <NUM> of <FIG> and <FIG>) of a shape having a flat space (e.g., the flat space <NUM> of <FIG> and <FIG>) and curved spaces (e.g., the curved spaces <NUM>, <NUM>, <NUM>, and <NUM> of <FIG> and <FIG>). According to an embodiment, the extension portion <NUM> may be removed through post-processing.

With reference to <FIG>, according to an embodiment, in operation <NUM>, post-processing of a structure mold-injected through the die may be performed.

In the embodiment of <FIG>, the post-processing may include removing the extension portion <NUM> from the mold-injected structure <NUM>. In the embodiment of <FIG>, the post-processing may include removing the extension portion <NUM> from the mold-injected structure <NUM>.

<FIG> is a diagram illustrating at least a portion of a state in which an extension portion <NUM> formed by a gate of a die is removed from the structure <NUM> of <FIG> according to an embodiment. With reference to <FIG> and <FIG>, when the extension portion <NUM> is removed from the structure <NUM>, a trace <NUM> of an area where the extension portion <NUM> is removed may remain at a surface <NUM> of the second curved border <NUM>. With reference to <FIG>, at a cross-section of line B-B' the structure <NUM> may include a first surface <NUM> (e.g., the first surface <NUM> of <FIG>) and a second surface <NUM> (e.g., the second surface <NUM> of <FIG>) disposed opposite to the first surface <NUM>. According to an embodiment, in order to reduce the degree to which the trace <NUM> is visible, film lamination, coating, or polishing may be performed at the first surface <NUM> of the structure <NUM>. According to an embodiment, the second surface <NUM> may have a pattern formed by imprinting a molding surface (e.g., the third molding surface <NUM> of <FIG>) of the die. In order to enable light to pass through the first surface <NUM> and reach the second surface <NUM>, a material used for film lamination or coating in relation to the trace <NUM> may be selected in consideration of transparency. According to certain embodiments, even in the structure <NUM> of the embodiment of <FIG>, after removing the extension portion <NUM> from the curved border portion <NUM>, various post-processes (e.g., film lamination, coating, or polishing) may be performed to reduce the degree to which the removal trace is visible.

<FIG> is a diagram illustrating a plate <NUM> formed by removing the extension portion <NUM> formed by the gate of the die from the structure <NUM> of <FIG> according to an embodiment. <FIG> is a plan view illustrating a plate <NUM> of <FIG> according to an embodiment.

With reference to <FIG>, in an embodiment, the plate <NUM> may include a flat portion <NUM> and a curved border portion <NUM>. The curved border portion <NUM> may include a first curved border <NUM>, second curved border <NUM>, third curved border <NUM>, fourth curved border <NUM>, first corner <NUM>, second corner <NUM>, third corner <NUM>, or fourth corner <NUM>.

With reference to <FIG>, <FIG>, and <FIG>, in an embodiment, the second housing portion <NUM> may be formed based on the plate <NUM> of <FIG>, and the curved border portion <NUM> may be seamlessly extended with bending from the flat portion <NUM> toward the first plate <NUM>. The plate <NUM> may be formed to be substantially transparent and include, for example, various materials such as glass or polymer.

<FIG> is a cross-sectional view taken along line C-C' in the plate <NUM> of <FIG> according to an embodiment. <FIG> is a cross-sectional view taken along line D-D' in the plate <NUM> of <FIG> according to an embodiment. With reference to <FIG>, <FIG>, <FIG>, and <FIG>, in an embodiment, the plate <NUM> may include a first surface <NUM> and a second surface 1002may be disposed opposite to each other. The second surface <NUM> may include a first edge <NUM>, a second edge <NUM> extended opposite to the first edge <NUM>, a third edge <NUM> connecting one of the first edge <NUM> and one of the second edge <NUM>, and a fourth edge <NUM> connecting the other end of the first edge <NUM> and the other end of the second edge <NUM> and extended opposite to the third edge <NUM>. The second surface <NUM> may include a first plane <NUM> formed by the flat portion <NUM>, a first curved surface <NUM> adjacent first edge <NUM> and formed by the first curved border <NUM>, a second curved surface <NUM> adjacent second edge <NUM> and formed by the second curved border <NUM>, a third curved surface <NUM> adjacent edge <NUM> and formed by the third curved border <NUM>, or a fourth curved surface <NUM> adjacent fourth edge <NUM> and formed by the fourth curved border <NUM>. The first plane <NUM> may include a first boundary <NUM> connected to a first curved surface <NUM>, a second boundary <NUM> connected to the second curved surface <NUM>, a third boundary <NUM> connected to a third curved surface <NUM>, or a fourth boundary <NUM> connected to a fourth curved surface <NUM>. The first boundary <NUM> and the second boundary <NUM> may be parallel, and the third boundary <NUM> and the fourth boundary <NUM> may be parallel.

With reference to <FIG>, the first curved surface <NUM> may extended, for example, from the first boundary <NUM> to the first edge <NUM> to seamlessly connect to the first plane <NUM>. According to an embodiment, the first edge <NUM> may be disposed apart from the first boundary <NUM> by a first height H1 in a +z axis direction, which is the direction of the first plane <NUM>. The first edge <NUM> may be disposed apart from the first boundary <NUM> by a first width W1 in the +x axis direction perpendicular to the +z axis direction. The shape of the first curved surface <NUM> may vary according to a curvature of each point between the first boundary <NUM> and the first edge <NUM>.

With reference to <FIG>, the second curved surface <NUM> may be extended, for example, from the second boundary <NUM> to the second edge <NUM> to be seamlessly connected to the first plane <NUM>. According to an embodiment, the second edge <NUM> may be disposed apart from the second boundary <NUM> by a second height H2 in the +z axis direction. The second edge <NUM> may be disposed apart from the second boundary <NUM> by a second width W2 in the -x axis direction. According to certain embodiments, the shape of the second curved surface <NUM> may vary according to a curvature of each point between the second boundary <NUM> and the second edge <NUM>. According to an embodiment, when viewed in cross-section, the first curved surface <NUM> and the second curved surface <NUM> may be symmetrical with one another, and with the first plane <NUM> interposed therebetween.

With reference to <FIG>, the third curved surface <NUM> may be extended, for example, from the third boundary <NUM> to the third edge <NUM> to seamlessly connect to the first plane <NUM>. According to an embodiment, the third edge <NUM> may be disposed apart from the third boundary <NUM> by a third height H3 in the +z axis direction. The third edge <NUM> may be disposed apart from the third boundary <NUM> by a third width W3 in the +y axis direction. According to certain embodiments, the shape of the third curved surface <NUM> may vary according to a curvature of each point between the third boundary <NUM> and the third edge <NUM>.

With reference to <FIG>, the fourth curved surface <NUM> may be, for example, extended from the fourth boundary <NUM> to the fourth edge <NUM> to seamlessly connect to the first plane <NUM>. According to an embodiment, the fourth edge <NUM> may be disposed apart from the fourth boundary <NUM> by a fourth height H4 in the +z axis direction. The fourth edge <NUM> may be disposed apart from the fourth boundary <NUM> by a fourth width W4 in the -y axis direction. According to certain embodiments, the shape of the fourth curved surface <NUM> may vary according to a curvature of each point between the fourth boundary <NUM> and the fourth edge <NUM>. According to an embodiment, when viewed in cross-section, the third curved surface <NUM> and the fourth curved surface <NUM> may be symmetrical to one another, with the first plane <NUM> interposed therebetween.

According to certain embodiments, the first height H1, the second height H2, the third height H3, or the fourth height H4 may be about <NUM> or more and <NUM> or less.

According to certain embodiments (not illustrated), at least two of the first height H1, the second height H2, the third height H3, and the fourth height H4 may be different from each other.

With reference to <FIG> and <FIG>, in an embodiment, the second surface <NUM> may include a first corner curved surface <NUM> that seamlessly connects a first curved surface <NUM> and a third curved surface <NUM> at the first corner <NUM>. The second surface <NUM> may include a second corner curved surface <NUM> that seamlessly connects the first curved surface <NUM> and a fourth curved surface <NUM> at the second corner <NUM>. The second surface <NUM> may include a third curved surface <NUM> that seamlessly connects a second curved surface <NUM> and the third corner curved surface <NUM> at the third corner <NUM>. The second surface <NUM> may include a fourth corner curved surface <NUM> that seamlessly connects the second curved surface <NUM> and the fourth curved surface <NUM> at the fourth corner <NUM>.

With reference to <FIG> and <FIG>, a shape of the first surface <NUM> may vary according to a thickness of the plate <NUM> from the first edge <NUM> to the second edge <NUM>. A shape of the first surface <NUM> may vary according to a thickness of the plate <NUM> from the third edge <NUM> to the fourth edge <NUM>.

<FIG> is a cross-sectional view illustrating a pattern formed at the second surface <NUM> of the plate <NUM> of <FIG> according to an embodiment.

In an embodiment, with reference to <FIG> and <FIG>, the second surface <NUM> of the plate <NUM> may have a pattern <NUM> in which the third molding surface <NUM> of the core block <NUM> is imprinted. For example, the pattern <NUM> may include protrusions <NUM>, <NUM>, <NUM>, and <NUM> having a convex shape, in a direction oriented from the first surface <NUM> (see <FIG> or <FIG>) to the second surface <NUM>, so as to correspond to the plurality of dimples <NUM>, <NUM>, <NUM>, and <NUM> of <FIG>. <FIG> illustrates only a part of the second surface <NUM>, and the pattern <NUM> may be formed in at least a part of the second surface <NUM>. For example, the pattern <NUM> may be formed in at least a portion of the first plane <NUM>, the first curved surface <NUM>, the second curved surface <NUM>, the third curved surface <NUM>, the first corner curved surface <NUM>, the second corner curved surface <NUM>, the third corner curved surface <NUM>, and/or the fourth corner curved surface <NUM> of <FIG>.

According to an embodiment, a pattern formed at the third molding surface <NUM> of the core block <NUM> illustrated in <FIG> is imprinted on the second surface <NUM> of the plate <NUM>; thus, the second surface <NUM> may have surface roughness having heights H41, H42, and H43 of about <NUM> or less.

According to an embodiment, the plate <NUM> mold-injected through the die may be implemented with a material capable of passing light. When light passes through the first surface <NUM> (see <FIG> or <FIG>) and reaches the second surface <NUM>, the pattern <NUM> separates a spectrum of light according to a wavelength by a diffraction phenomenon of light to implement a visual surface texture that makes monochromatic lights of visible light visible.

According to certain embodiments, because light transmittance is higher and a haze value is lower, an amount of light passing through the first surface <NUM> (see <FIG> or <FIG>) and reaching the second surface <NUM> increases; thus, in consideration that it is easy to implement a visual surface texture by a spectrum, the mold-injected plate <NUM> may be implemented with various materials. According to the invention, the mold-injected plate <NUM> has light transmittance of <NUM>% or more and/or may have a haze value of about <NUM>% or less so that the visual surface texture by a spectrum may be visible.

With reference to <FIG>, in certain embodiments, post-processing according to operation <NUM> may include processing of forming the openings <NUM> and <NUM>, the microphone hole <NUM>, the speaker hole <NUM>, and/or the connector holes <NUM> and <NUM> of <FIG> in the plate <NUM> of <FIG>.

With reference to <FIG>, in certain embodiments, post-processing according to operation <NUM> may include processing of disposing various layers at the second surface <NUM> of the plate <NUM> illustrated in <FIG>.

<FIG> is a cross-sectional view illustrating the second housing portion <NUM> of <FIG> according to an embodiment.

With reference to <FIG>, the second housing portion <NUM> may include a plate <NUM> and a decoration layer <NUM> disposed at the second surface <NUM> of the plate <NUM> to provide a visual effect. According to an embodiment, the decoration layer <NUM> may include at least one layer, for example, a first color layer <NUM> and/or a second color layer <NUM>.

According to an embodiment, the first color layer <NUM> is a translucent thin film layer and may implement a color. According to certain embodiments, the first color layer <NUM> may serve to increase surface reflectivity. For example, the first color layer <NUM> may be disposed at the second surface <NUM> of the plate <NUM> through various deposition methods such as physical vapor deposition (PVD). Physical vapor deposition may vaporize various metal materials such as indium, titanium oxide, aluminum oxide, or silicon oxide in a vacuum, thereby coating vaporized metal atoms on the second surface <NUM> of the plate <NUM>.

According to an embodiment, the second color layer <NUM> is an opaque thin film layer and may implement a color. A color of the second color layer <NUM> may make a color of the first color layer <NUM> appear darker. When the second housing portion <NUM> is disposed at the electronic device (e.g., the electronic device <NUM> of <FIG>), the second color layer <NUM> may serve as a shield to hide the inside of the electronic device.

According to certain embodiments, at least one layer included in the decoration layer <NUM> may include various materials for shielding electromagnetic waves (e.g., EMI shielding).

According to certain embodiments (not illustrated), the second housing portion <NUM> may further include various other layers, or some layers may be omitted. According to certain embodiments (not illustrated), the second housing portion <NUM> may be disposed at the first surface <NUM> (see <FIG> and <FIG>) of the plate <NUM> to include various layers for visual effects (see <FIG>). According to certain embodiments (not illustrated), the stacking order of the first color layer <NUM> and the second color layer <NUM> may be changed.

According to certain embodiments (not illustrated), the second housing portion <NUM> may have a plurality of first color layers or a plurality of second color layers.

According to an embodiment, when light <NUM> passes through the first surface <NUM> (see <FIG> or <FIG>) to reach the second surface <NUM>, or an interface between the plate <NUM> and the decoration layer <NUM>, the pattern <NUM> (e.g., diffraction grating) formed at the second surface <NUM> separates a spectrum of light according to a wavelength by a diffraction phenomenon of light to implement a visual surface texture that makes monochromatic lights <NUM> of visible light visible. Because of a thickness between the first surface <NUM> and the second surface <NUM> and the pattern <NUM> formed at the second surface <NUM>, a visual surface texture having a sense of depth may be visible.

According to certain embodiments, a material of the plate <NUM> and/or the decoration layer <NUM> may be selected in consideration of a refractive index between the plate <NUM> and the decoration layer <NUM>. As the refractive index difference between the plate <NUM> and the decoration layer <NUM> increases, reflectivity of the interface between the plate <NUM> and the decoration layer <NUM> may increase. For example, as reflectivity of the interface between the plate <NUM> and the decoration layer <NUM> increases, an amount of light reflected and/or diffracted at the interface increases, thereby making it easier to implement a visual surface texture. According to certain embodiments, at least a portion of the decoration layer <NUM> may include various reflective materials.

According to an embodiment, when the pattern formed at the third molding surface <NUM> of the core block <NUM> illustrated in <FIG> includes burrs, the pattern <NUM> of the second surface <NUM> of the plate <NUM> in which the pattern formed at the third molding surface <NUM> is imprinted may include pattern shapes <NUM>, <NUM>, and <NUM> by the burrs. These pattern shapes <NUM>, <NUM>, and <NUM> may make formation of a spectrum difficult. Further, the pattern shapes due to the burrs may enable the second surface <NUM> to have surface roughness in which heights H51, H52, and H53 exceed about <NUM>.

<FIG> is a diagram illustrating a cross-sectional curve <NUM> of the plate <NUM> of <FIG> according to an embodiment. With reference to <FIG>, a pattern (e.g., the pattern <NUM> of <FIG>) formed at the second surface <NUM> (see <FIG>) of the plate <NUM> may have surface roughness having a height of about <NUM> or less (e.g., about <NUM>).

<FIG>, <FIG> are diagrams illustrating various visual surface textures viewed through the second housing portion <NUM> of <FIG> according to certain embodiments.

According to certain embodiments, the pattern formed at the second surface <NUM> of the plate <NUM> illustrated in <FIG> may vary according to a pattern formed at the molding surface of the die. Based on various patterns formed at the second surface <NUM> of the plate <NUM> illustrated in <FIG>, various visual surface textures through a spectrum may be viewed as illustrated in <FIG>, <FIG>.

For example, when dimples are formed at the molding surface of the die using corrosion (e.g., chemical corrosion or electrical corrosion) or a laser (e.g., microsecond laser or nanosecond laser) with a pulse width greater than a preset or specified value, residues such as burrs may be formed at the periphery of the dimple. A surface of the structure on which the molded surface is imprinted through injection molding may have difficulty in separating a spectrum of light according to a wavelength because of the burrs.

According to certain embodiments (not illustrated), with reference to <FIG> and <FIG>, a pattern (e.g., the pattern <NUM> of <FIG>, the pattern <NUM> of <FIG>, the pattern <NUM> of <FIG>, the pattern <NUM> of <FIG>, or the pattern <NUM> of <FIG>) may be formed in at least a portion of the first molding surface <NUM> and the second molding surface <NUM> of the die <NUM>. The first surface <NUM> of the plate (e.g., the plate <NUM> of <FIG>) mold-injected through the die <NUM> may have a pattern in which the first molding surface <NUM> and/or the second molding surface <NUM> is imprinted. Various layers such as the decoration layer <NUM> of <FIG> may be disposed at the first surface <NUM>. A visual surface texture in which monochromatic lights of visible light are visible may be implemented through the first surface <NUM> including the pattern.

According to certain embodiments (not illustrated), the disclosure is not limited to a method in which the pattern is imprinted in the structure mold-injected based on a pattern (e.g., the pattern <NUM> of <FIG>, the pattern <NUM> of <FIG>, the pattern <NUM> of <FIG>, the pattern <NUM> of <FIG>, or the pattern <NUM> of <FIG>) formed at the molding surface of the die, and the pattern may be directly formed at the surface of the structure. For example, a pattern may be formed using a laser (e.g., femtosecond laser) having a pulse width equal to or less than a preset or specified value at the surface of the structure. When using a laser having a pulse width equal to or less than the preset or specified value, a pattern for facilitating a spectrum by reducing occurrence of burrs may be formed. A surface of a structure having a pattern formed using a laser having a pulse width less than or equal to the preset or specified value may have surface roughness forming a height of about <NUM> or less.

As an example, the housing forming an external shape of the electronic device may be produced by a method of forming a UV molding layer having a fine pattern at the surface of the structure through UV molding. However, when the surface of the structure is not a flat shape, such as having edges or corners where several surfaces meet, it may be difficult to perform rolling that uniformly spreads a UV molding liquid (e.g., UV curable resin) at the surface during UV molding.

As another example, the housing may be produced by laminating a layer having a fine pattern through UV molding and various other layers on a sheet (e.g., a plate material to be a basis for disposing layers) and then thermoforming through the die. However, it may be difficult to secure a yield because of poor dimensional stability such as shape deformation in thermoforming. Further, when a shape such as an edge or a corner where several surfaces meet is formed, a crack may easily occur.

As another example, the housing may be produced by attaching a film having a fine pattern to the structure. However, the surface of the structure may have edges or corners where several surfaces meet, and when the flat film is bonded to the surface, the film may not adhere evenly at the edges or corners, resulting in bonding defects such as folding or wrinkles.

As another example, the housing may be produced by disposing a film having a fine pattern in the die and then injecting a resin to form a member bonded to the film. However, when the flat film is deformed into a shape having edges or corners where several surfaces meet in the die, defects such as folding may occur.

According to an embodiment, the housing (e.g., the second housing portion <NUM> of <FIG>) may not use a film having a fine pattern or a layer through UV molding and may have a fine pattern for a visual surface texture without restrictions on the surface shape of the housing.

<FIG> is a cross-sectional view illustrating the second housing portion <NUM> of <FIG> according to another embodiment.

With reference to <FIG>, for example, the second housing portion <NUM> may include a plate <NUM> and a decoration layer <NUM> disposed at the second surface <NUM> of the plate <NUM> to provide a visual effect. According to an embodiment, the decoration layer <NUM> may include a first layer <NUM> and/or a second layer <NUM>. The first layer <NUM> may be positioned between the plate <NUM> and the second layer <NUM>. When light is incident on the first surface <NUM>, various visual effects by the plate <NUM>, the first layer <NUM>, and/or the second layer <NUM> may be provided to the user. "Visual effect is provided to the user" may be understood as "visual effect is perceived by the user or transferred to the user". The visual effect may include, for example, various visual characteristics such as a visual texture (or visual surface texture), a visual pattern, or a visual color that the user feels for the second housing portion <NUM> when viewed toward the first surface <NUM>. When light is incident on the first surface <NUM>, various visual effects may be provided to the user because of medium characteristics of a structure (e.g., layer structure) formed with a plurality of layers included in the second housing portion <NUM>. The visual effect may be, for example, implemented in various ways based on various light phenomena in which light incident on the first surface <NUM> is reflected, refracted, scattered, or dispersed by the layer structure of the second housing portion <NUM>. The visual effect may be variously implemented based on, for example, light transmittance and refractive index of each layer, and reflectivity at an interface between layers.

According to an embodiment, after a laminated film including the first layer <NUM> and the second layer <NUM> is produced, the laminated film may be bonded to the plate <NUM>. According to some embodiments, after the laminated film including the first layer <NUM> is bonded to the plate, the second layer <NUM> may be disposed at the laminated film.

According to an embodiment, the second surface <NUM> of the plate <NUM> may include a first pattern (e.g., the pattern <NUM> of <FIG>) for separating a spectrum of light according to a wavelength to implement a visual effect that enables viewing of monochromatic lights of visible light. The first pattern included in the second surface <NUM> may imprint, for example, a pattern formed at the third molding surface <NUM> of the core block <NUM> illustrated in <FIG>, thereby having surface roughness of about <NUM> or less. When light passes through the first surface <NUM> and reaches the second surface <NUM> or the interface between the plate <NUM> and the first layer <NUM>, a first pattern (e.g., diffraction grating) formed at the second surface <NUM> may provide a user with a first visual texture that enables viewing of monochromatic lights of visible light by separating a spectrum of light according to a wavelength. Because of a thickness between the first surface <NUM> and the second surface <NUM>, and a first pattern formed at the second surface <NUM>, a first visual texture may be provided to the user with a sense of depth. The sense of depth may be defined as perception of a distance (e.g., distance perception or depth perception) in which a visual effect such as a visual texture or a visual pattern is visually transferred to a user.

According to an embodiment, the first layer <NUM> may include a base film <NUM>, a transparent adhesive layer <NUM>, and a pattern layer <NUM>. The transparent adhesive layer <NUM> may be positioned between the plate <NUM> and the base film <NUM>. The base film <NUM> may be positioned between the transparent adhesive layer <NUM> and the pattern layer <NUM>.

According to certain embodiments (not illustrated), a primer may be positioned between the plate <NUM> and the transparent adhesive layer <NUM>. After applying a primer to the second surface <NUM> of the plate <NUM>, the first layer <NUM> may be bonded to the primer. The plate <NUM> and the transparent adhesive layer <NUM> may be bonded to each other without gaps or bubbles by the primer. The primer may be, for example, formed in a thin film of about <NUM> or less having a shape following the first pattern (e.g., the pattern <NUM> of <FIG>) of the second surface <NUM> of the plate <NUM>. The primer may include a material having bonding affinity with the plate <NUM> and the transparent adhesive layer <NUM>. According to certain embodiments, the primer may have a color, and when light is incident on the first surface <NUM>, a visually unique color of the second housing portion <NUM> may be implemented by the primer.

The base film <NUM> is, for example, a film that serves as a basis for disposing at least one layer, and may be, for example, formed with various polymers such as polycarbonate (PC) or polyethylene terephthalate (PET). The base film (or polymer film) <NUM> may include a substantially transparent or translucent material. A transparent adhesive layer <NUM> for bonding to the plate <NUM> may be disposed at one surface of the base film <NUM>, and the pattern layer <NUM> may be disposed at the other surface of the base film <NUM>. The visual effect by the first layer <NUM> may be substantially implemented by the pattern layer <NUM>.

According to an embodiment, the pattern layer <NUM> may be formed through UV molding. For example, the pattern layer <NUM> (e.g., UV molding layer) may be formed by injecting an ultraviolet curable resin into the die to which a pattern is applied, placing and pressing the base film <NUM> on the die to which an ultraviolet curable resin is injected, and radiating and curing ultraviolet rays. The UV molding layer may have a second pattern in which a die pattern (e.g., uneven pattern) is substantially imprinted. The second pattern may include, for example, an uneven surface including a plurality of dimples or a plurality of slits. The second pattern of the UV molding layer may be, for example, positioned at an interface between the first layer <NUM> and the second layer <NUM>. The visual effect (e.g., visual color) implemented by the second layer <NUM> may be transferred to the user by adding a visual texture (or visual pattern) by the second pattern. According to an embodiment, a first visual texture by the second surface <NUM> of the plate <NUM> and a second visual texture by the second layer <NUM> may be added and transferred to the user. The first visual texture and the second visual texture may be transferred to the user with different senses of depth. According to certain embodiments, the pattern layer <NUM> may replace the UV molding layer or may further include at least one added another molding layer. The other molding layer may be a molding layer cured by using ultraviolet rays or light of various other bands.

According to some embodiments (not illustrated), a primer may be positioned between the base film <NUM> and the UV molding layer (e.g., the pattern layer <NUM>). For example, a molding layer (e.g., UV molding layer) including a second pattern may be formed by applying a primer to the base film <NUM>, applying a photocurable resin to the primer, and radiating light (e.g., ultraviolet rays) in a designated band to a photocurable resin. The base film <NUM> and the UV molding layer may be bonded without gaps or bubbles by the primer. The primer may include a material having bonding affinity with the base film <NUM> and the UV molding layer.

According to certain embodiments, the second pattern of the UV molding layer (e.g., the pattern layer <NUM>) may implement a visual texture that enables viewing of monochromatic lights of visible light by separating a spectrum of light according to a wavelength by a diffraction phenomenon of light. When light passes through the first surface <NUM> and reaches an interface between the UV molding layer and the second layer <NUM>, the second pattern (e.g., diffraction grating) formed at the interface may implement a visual texture that enables viewing of monochromatic lights of visible light by separating a spectrum of light according to a wavelength by a diffraction phenomenon of light.

According to certain embodiments, the pattern layer <NUM> may include a gradient pattern for a visual effect of the gradient. For example, the gradient pattern may be printed on the base film <NUM>.

According to certain embodiments, the pattern layer <NUM> may include a UV molding layer and a layer including a gradient pattern. The layer including the gradient pattern may be, for example, positioned between the base film <NUM> and the UV molding layer. The second pattern of the UV molding layer may be positioned at an interface between the first layer <NUM> and the second layer <NUM>.

The transparent adhesive layer <NUM> may include, for example, an optically transparent adhesive material such as an optical clear adhesive (OCA). When the first layer <NUM> is bonded to the plate <NUM>, a release film protecting the transparent adhesive layer <NUM> may be separated, thereby exposing the transparent adhesive layer <NUM>. The transparent adhesive layer <NUM> may reduce an air gap between the plate <NUM> and the base film <NUM>. For example, when there is an air gap between the plate <NUM> and the base film <NUM>, deformation or loss of light may occur because of the difference in refractive index between different media (e.g., the plate <NUM>, air gap, and the base film <NUM>); thus, a quality of the visual effect by the plate <NUM>, the first layer <NUM>, and/or the second layer <NUM> may be deteriorated. According to an embodiment, when the plate <NUM> and the first layer <NUM> are coupled without an air gap because of the transparent adhesive layer <NUM>, the difference in refractive index between the transparent adhesive layer <NUM> and a medium layer in contact therewith may be reduced; thus, reflectivity of the interface between the transparent adhesive layer <NUM> and the medium layer in contact therewith may be deteriorated. Accordingly, it is possible to reduce reflection at the interface and deformation or loss of light resulting therefrom, thereby securing a quality of the visual effect by the plate <NUM>, the first layer <NUM>, and/or the second layer <NUM>.

According to certain embodiments, when the plate <NUM> and the first layer <NUM> are bonded, in order to reduce generation of bubbles because of surface roughness of the second surface <NUM> of the plate <NUM> (e.g., uneven surface having surface roughness of about <NUM> or less), the transparent adhesive layer <NUM> may use a liquid adhesive such as an optical clear resin (OCR) or a super view resin (SVR).

According to an embodiment, the second layer <NUM> may include a first color layer <NUM> and/or a second color layer <NUM>.

The first color layer <NUM> (e.g., the first color layer <NUM> of <FIG>) may implement, for example, a color as a translucent thin film layer. According to certain embodiments, the first color layer <NUM> may serve to increase surface reflectivity. For example, the first color layer <NUM> may be disposed at the first layer <NUM> through various deposition methods such as physical vapor deposition (PVD). In the physical vapor deposition, various metal materials such as indium, titanium oxide, aluminum oxide, or silicon oxide may be vaporized in a vacuum so that vaporized metal atoms may be coated on the surface of the first layer <NUM>.

The second color layer <NUM> (e.g., the second color layer <NUM> of <FIG>) may implement, for example, a color as an opaque thin film layer. The color of the second color layer <NUM> may make the color of the first color layer <NUM> appear darker. When the second housing portion <NUM> is disposed at the electronic device (e.g., the electronic device <NUM> of <FIG>), the second color layer <NUM> may serve as a shield to prevent the inside of the electronic device from being viewed.

According to certain embodiments (not illustrated), the second plate <NUM> may further include various other layers, or some layers may be omitted. According to certain embodiments (not illustrated), the second plate <NUM> may be disposed at the first surface <NUM> (see <FIG> and <FIG>) of the plate <NUM> to include various layers for visual effects (see <FIG>). According to certain embodiments (not illustrated), the stacking order of the first color layer <NUM> and the second color layer <NUM> may be changed.

According to certain embodiments, at least one of a plurality of layers between the first surface <NUM> and the second layer <NUM> may have a color. "Have a color" may be understood as the opposite concept of "be colorless or transparent that can transfer or pass all or most of the colors". When light is incident on the first surface <NUM>, a color of at least one layer may be visually provided to the user.

Claim 1:
An electronic device (<NUM>), comprising:
a housing (<NUM>) including:
a first plate (<NUM>) forming a front surface (110A) of the housing,
a second plate (<NUM>, <NUM>) integrally forming a rear surface (110B) and side surface (110C, <NUM>) of the housing (<NUM>),
wherein a space is enclosed between the front surface (110A), side surface (110B) and rear surface (110C), and
wherein the second plate (<NUM>) includes a first surface (<NUM>) forming the side (110C) and rear (110B) surfaces of the housing (<NUM>), and a second surface (<NUM>, <NUM>) disposed opposite to the first surface (<NUM>); and
a display (<NUM>) disposed in the space and at least partially visible through the first plate (<NUM>),
wherein at least a portion of the second surface (<NUM>, <NUM>) includes a pattern (<NUM>) having surface roughness having a height of <NUM> to <NUM>, and
wherein the second plate (<NUM>, <NUM>) includes a light transmittance rate of <NUM>% to <NUM>%.