KR20210109336A - Mobile terminal - Google Patents

Abstract

Provided is a mobile terminal comprising: a button unit including a package waterproof structure, provided to expose one surface to an outer surface of the mobile terminal, and receiving a signal of a user; a substrate unit located inside the mobile terminal and coupled to the button unit to exchange an electrical signal with the button unit; a solder unit provided between the button unit and the substrate unit and including a first solder which is formed along an edge of the button unit and a second solder which is provided inside the first solder to transmit the electrical signal; and a gas hole formed on the substrate unit and formed to be placed inside the first solder.

Description

mobile terminal {MOBILE TERMINAL}

The present invention relates to a mobile terminal.

The terminal may be divided into a mobile/portable terminal and a stationary terminal according to whether the terminal can be moved. Again, the mobile terminal can be divided into a handheld terminal and a vehicle mounted terminal depending on whether the user can carry it directly.

The functions of mobile terminals are diversifying. For example, there are functions for data and voice communication, photo and video shooting through a camera, voice recording, music file playback through a speaker system, and an image or video output to the display unit. Some terminals add an electronic game play function or perform a multimedia player function. In particular, recent mobile terminals can receive multicast signals that provide broadcast and visual content such as video or television programs.

As such a terminal is diversified in functions, for example, in the form of a multimedia player equipped with complex functions such as taking pictures or videos, playing music or video files, playing games, and receiving broadcasts. is being implemented.

In order to support and increase the function of the terminal, it may be considered to improve the structural part and/or the software part of the terminal.

In particular, a sensor package that receives a signal such as a fingerprint from the outside by a user may have various technical problems due to liquid penetration. For example, in the case of a fingerprint recognition sensor, if liquid penetrates, the signal line for the fingerprint sensor and the power supply line necessary for operation short each other, resulting in malfunction, as well as system off, malfunction, and malfunction of the mobile terminal. It can cause serious problems such as overheating.

Various waterproof structures have been tried in the prior art to prevent liquid penetration into the signal transmission region of the package. In the case of ACF bonding using anisotropic conductive film (ACF), an auxiliary device such as a jig is required because the waterproof film must be accurately attached, the process time is long, and the waterproof test can be limitedly performed through destructive testing. there is a problem that In addition, in the SMT manufacturing process, a waterproof structure was implemented by attaching an epoxy sealing and a plurality of waterproof tapes, but there is a problem in that the parts are thick as a whole and the manufacturing process is increased.

An object of the present invention is to provide a mobile terminal in which a package waterproof structure is implemented in an SMT manufacturing process while solving the problem of the conventional package waterproof structure described above.

According to one aspect of the present invention to achieve the above or other object, in a mobile terminal having a package waterproof structure, the package waterproof structure is provided such that one surface is exposed on the outer surface of the mobile terminal, and receives a user's signal A button unit for receiving an input, located inside the mobile terminal, a substrate unit coupled to the button unit and exchanging electrical signals with the button unit, provided between the button unit and the substrate unit, and formed along the edge of the button unit A solder portion including a first solder, a second solder provided inside the first solder to transmit an electrical signal, and a gas hole formed in the substrate portion to be positioned inside the first solder .

In addition, according to another aspect of the present invention, the signal line is provided only in the portion in contact with the second solder of the portion in contact with the solder portion of the substrate portion.

In addition, according to another aspect of the present invention, the solder part is made of a lead material.

Further, according to another aspect of the present invention, the first solder and the second solder are made of the same lead material.

In addition, according to another aspect of the present invention, a waterproof tape is attached to the opposite side of the surface to which the button unit is coupled in the substrate unit.

In addition, according to another aspect of the present invention, one surface of the button unit functions to receive a user's fingerprint pattern.

The effects of the mobile terminal according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, by providing a package waterproof structure, it is possible to prevent a technical problem such as a short circuit by blocking liquid penetration into the signal transmission region of the package.

In addition, according to at least one of the embodiments of the present invention, the package waterproof structure can be implemented only by the SMT manufacturing process, thereby reducing cost or process time, and preventing an increase in the thickness of the component due to the waterproof member.

In addition, according to at least one of the embodiments of the present invention, there is an advantage that the waterproof test can be performed only as a non-destructive test.

Further scope of applicability of the present invention will become apparent from the following detailed description. However, various changes and modifications within the spirit and scope of the present invention can be clearly understood by those skilled in the art, so it is understood that the detailed description and specific embodiments such as preferred embodiments of the present invention are given by way of example only. should be

1 is a block diagram illustrating a related mobile terminal of the present invention.
2 is a perspective view of an embodiment of a mobile terminal related to the present invention viewed from the front.
3 is a perspective view of an embodiment of a mobile terminal related to the present invention viewed from the rear.
Figure 4 shows an embodiment of the package waterproof structure constituting the mobile terminal of the present invention.
5 is a view showing the bottom surface as an embodiment of the button part constituting the package waterproof structure.
6 is a view showing a portion coupled to the button unit as an embodiment of the substrate part constituting the package waterproof structure.
7 is a cross-sectional view of the package waterproof structure of FIG. 4 .
8 is a diagram illustrating a flow of a high-temperature gas during a manufacturing process in the waterproof structure of the package of FIG. 4 .

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as "comprises" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

1 to 3, FIG. 1 is a block diagram illustrating a mobile terminal 100 related to the present invention, and FIGS. 2 and 3 are front views of an embodiment of the mobile terminal 100 related to the present invention. and a perspective view viewed from the rear.

The mobile terminal 100 includes a wireless communication unit 110 , an input unit 120 , a sensing unit 140 , an output unit 150 , an interface unit 160 , a memory 170 , a control unit 180 , and a power supply unit 190 . and the like. The components shown in FIG. 1 are not essential in implementing the mobile terminal 100, so the mobile terminal 100 described in this specification may have more or fewer components than those listed above. have.

More specifically, among the components, the wireless communication unit 110 includes a wireless communication system between the mobile terminal 100 and a wireless communication system, between the mobile terminal 100 and another mobile terminal, or between the mobile terminal 100 and an external server. It may include one or more modules that enable communication. In addition, the wireless communication unit 110 may include one or more modules for connecting the mobile terminal 100 to one or more networks.

The wireless communication unit 110 may include at least one of a broadcast reception module 111 , a mobile communication module 112 , a wireless Internet module 113 , a short-range communication module 114 , and a location information module 115 . .

The input unit 120 includes a camera 121 or an image input unit for inputting an image signal, a microphone 122 or an audio input unit for inputting an audio signal, and a user input unit 123 for receiving information from a user, for example, , a touch key, a physical key, etc.). The voice data or image data collected by the input unit 120 may be analyzed and processed as a user's control command.

The sensing unit 140 may include one or more sensors for sensing at least one of information in the mobile terminal 100 , surrounding environment information surrounding the mobile terminal 100 , and user information. For example, the sensing unit 140 may include a proximity sensor 141, an illumination sensor 142, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity. Sensor (G-sensor), gyroscope sensor, motion sensor, RGB sensor, infrared sensor (IR sensor: infrared sensor), fingerprint sensor (finger scan sensor), ultrasonic sensor , optical sensors (eg, cameras (see 121)), microphones (see 122), battery gauges, environmental sensors (eg, barometers, hygrometers, thermometers, radiation detection sensors, It may include at least one of a thermal sensor, a gas sensor, etc.) and a chemical sensor (eg, an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the mobile terminal 100 disclosed in this specification may combine and utilize information sensed by at least two or more of these sensors.

The output unit 150 is for generating an output related to visual, auditory or tactile sense, and includes at least one of a display unit 151 , a sound output unit 152 , a haptic module 153 , and an optical output unit 154 . can do. The display unit 151 may implement a touch screen by forming a layer structure with the touch sensor or being formed integrally with the touch sensor. Such a touch screen may function as the user input unit 123 providing an input interface between the mobile terminal 100 and the user, and may provide an output interface between the mobile terminal 100 and the user.

The interface unit 160 serves as a passage with various types of external devices connected to the mobile terminal 100 . This interface unit 160, a wired / wireless headset port (port), an external charger port (port), a wired / wireless data port (port), a memory card (memory card) port, for connecting a device equipped with an identification module It may include at least one of a port, an audio input/output (I/O) port, a video input/output (I/O) port, and an earphone port. In response to the connection of the external device to the interface unit 160 , the mobile terminal 100 may perform appropriate control related to the connected external device.

In addition, the memory 170 stores data supporting various functions of the mobile terminal 100 . The memory 170 may store a plurality of application programs (application programs or applications) driven in the mobile terminal 100 , data for operation of the mobile terminal 100 , and commands. At least some of these application programs may be downloaded from an external server through wireless communication. In addition, at least some of these application programs may exist on the mobile terminal 100 from the time of shipment for basic functions (eg, incoming calls, outgoing functions, message reception, and outgoing functions) of the mobile terminal 100 . Meanwhile, the application program may be stored in the memory 170 , installed on the mobile terminal 100 , and driven to perform an operation (or function) of the mobile terminal 100 by the controller 180 .

In addition to the operation related to the application program, the controller 180 generally controls the overall operation of the mobile terminal 100 . The controller 180 may provide or process appropriate information or functions to the user by processing signals, data, information, etc. input or output through the above-described components or by driving an application program stored in the memory 170 .

Also, the controller 180 may control at least some of the components discussed with reference to FIG. 1 in order to drive an application program stored in the memory 170 . Furthermore, in order to drive the application program, the controller 180 may operate by combining at least two or more of the components included in the mobile terminal 100 with each other.

The power supply unit 190 receives external power or internal power under the control of the control unit 180 to supply power to each component included in the mobile terminal 100 . The power supply 190 includes a battery, and the battery may be a built-in battery or a replaceable battery.

At least some of the respective components may operate in cooperation with each other to implement the operation, control, or control method of the mobile terminal 100 according to various embodiments to be described below. Also, the operation, control, or control method of the mobile terminal 100 may be implemented on the mobile terminal 100 by driving at least one application program stored in the memory 170 .

2 and 3 , the disclosed mobile terminal 100 has a bar-shaped terminal body. However, the present invention is not limited thereto, and may be applied to various structures such as a watch type, a clip type, a glass type, or a folder type in which two or more bodies are coupled to be relatively movable, a flip type, a slide type, a swing type, a swivel type, etc. . Although it will relate to a particular type of mobile terminal, descriptions regarding a particular type of mobile terminal are generally applicable to other types of mobile terminals.

Here, the terminal body may be understood as a concept referring to the mobile terminal 100 as at least one aggregate.

The mobile terminal 100 includes a case (eg, a frame, a housing, a cover, etc.) forming an exterior. As shown, the mobile terminal 100 may include a front case 101 and a rear case 102 . Various electronic components are disposed in the inner space formed by the combination of the front case 101 and the rear case 102 . At least one middle case may be additionally disposed between the front case 101 and the rear case 102 .

A display unit 151 is disposed on the front surface of the terminal body to output information. As illustrated, the window 151a of the display unit 151 may be mounted on the front case 101 to form a front surface of the terminal body together with the front case 101 .

In some cases, an electronic component may also be mounted on the rear case 102 . Electronic components that can be mounted on the rear case 102 include a removable battery, an identification module, a memory card, and the like. In this case, the rear cover 103 for covering the mounted electronic component may be detachably coupled to the rear case 102 . Accordingly, when the rear cover 103 is separated from the rear case 102 , the electronic components mounted on the rear case 102 are exposed to the outside.

As illustrated, when the rear cover 103 is coupled to the rear case 102 , a portion of the side surface of the rear case 102 may be exposed. In some cases, the rear case 102 may be completely covered by the rear cover 103 during the combination. On the other hand, the rear cover 103 may be provided with an opening for exposing the camera 121b, the light output unit 154, the flash 124 and the first operation unit 123a to the outside.

The cases 101 , 102 , and 103 may be formed by injection of synthetic resin or may be formed of metal, for example, stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

Unlike the above example in which a plurality of cases provide an internal space for accommodating various electronic components, the mobile terminal 100 may be configured such that one case provides the internal space. In this case, the mobile terminal 100 of the uni-body in which synthetic resin or metal is connected from the side to the back can be implemented.

Meanwhile, the mobile terminal 100 may include a waterproofing unit (not shown) that prevents water from permeating into the terminal body. For example, the waterproof part is provided between the window 151a and the front case 101, between the front case 101 and the rear case 102, or between the rear case 102 and the rear cover 103, and a combination thereof It may include a waterproof member for sealing the inner space of the city.

The mobile terminal 100 includes a display unit 151 , first and second sound output units 152a and 152b , a proximity sensor 141 , an illuminance sensor 142 , a light output unit 154 , and first and second audio outputs. Cameras 121a and 121b, first and second operation units 123a and 123b, a microphone 122, an interface unit 160, and the like may be provided.

Hereinafter, as shown in FIGS. 2 and 3 , the display unit 151, the first sound output unit 152a, the proximity sensor 141, the illuminance sensor 142 and the first camera ( 121a) is disposed, the second operation unit 123b, the second sound output unit 152b, the microphone 122 and the interface unit 160 are disposed on the side surface of the terminal body, and the light output unit is disposed on the rear surface of the terminal body The mobile terminal 100 in which the 154, the operation unit 123a, the second camera 121b, and the flash 124 are disposed will be described as an example.

However, these configurations are not limited to this arrangement. These components may be excluded, replaced, or disposed on different sides as necessary. For example, the first operation unit 123a may not be provided on the rear surface of the terminal body, and the second sound output unit 152b may be provided on the rear surface of the terminal body rather than the side surface of the terminal body.

The display unit 151 displays (outputs) information processed by the mobile terminal 100 . For example, the display unit 151 may display execution screen information of an application program driven in the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information. .

The display unit 151 includes a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (Flexible Display). display), a three-dimensional display (3D display), and an electronic ink display (e-ink display) may include at least one.

In addition, two or more display units 151 may exist depending on the implementation form of the mobile terminal 100 . In this case, in the mobile terminal 100 , a plurality of display units may be spaced apart from each other or disposed integrally on one surface, or may be respectively disposed on different surfaces.

The display unit 151 may include a touch sensor for sensing a touch on the display unit 151 so as to receive a control command input by a touch method. Using this, when a touch is made to the display unit 151, the touch sensor detects the touch, and the controller 180 may generate a control command corresponding to the touch based thereon. The content input by the touch method may be letters or numbers, or menu items that can be instructed or designated in various modes.

On the other hand, the touch sensor is configured in the form of a film having a touch pattern and disposed between the window 151a and a display (not shown) on the rear surface of the window 151a, or a metal wire patterned directly on the rear surface of the window 151a. may be Alternatively, the touch sensor may be integrally formed with the display. For example, the touch sensor may be disposed on a substrate of the display or provided inside the display.

As such, the display unit 151 may form a touch screen together with the touch sensor, and in this case, the touch screen may function as the user input unit 123 (refer to FIG. 1 ). In some cases, the touch screen may replace at least some functions of the operation units 123a and 123b.

The first sound output unit 152a may be implemented as a receiver that transmits a call sound to the user's ear, and the second sound output unit 152b is a loud speaker that outputs various alarm sounds or multimedia reproduction sounds. ) can be implemented in the form of

A sound hole for emitting sound generated from the first sound output unit 152a may be formed in the window 151a of the display unit 151 . However, the present invention is not limited thereto, and the sound may be configured to be emitted along an assembly gap between structures (eg, a gap between the window 151a and the front case 101). In this case, the appearance of the mobile terminal 100 may be simpler because the holes formed independently for sound output are not visible or hidden.

The light output unit 154 is configured to output light to notify the occurrence of an event. Examples of the event may include a message reception, a call signal reception, a missed call, an alarm, a schedule notification, an email reception, and information reception through an application. When the user's event confirmation is detected, the controller 180 may control the light output unit 154 to end the light output.

The first camera 121a processes an image frame of a still image or a moving image obtained by an image sensor in a shooting mode or a video call mode. The processed image frame may be displayed on the display unit 151 and stored in the memory 170 .

The manipulation units 123a and 123b are an example of the user input unit 123 operated to receive a command for controlling the operation of the mobile terminal 100 , and may also be collectively referred to as a manipulating portion. The manipulation units 123a and 123b may be adopted in any manner as long as they are operated in a tactile manner such as touch, push, scroll, etc., while the user receives a tactile feeling. In addition, the operation units 123a and 123b may be operated in a manner in which the user is operated without a tactile feeling through a proximity touch, a hovering touch, or the like.

The operation units 123a and 123b may be a push key or may be configured as a combination of a touch key and a push key. In addition, the operation units (123a, 123b) may be configured in a layered form with the fingerprint sensor.

The contents input by the operation units 123a and 123b may be set in various ways. The operation units 123a and 123b receive commands such as menu, home key, cancel, search, etc., adjust the volume of sound output from the first or second sound output units 152a and 152b, and touch the display unit 151 . A command such as switching to the recognition mode may be input.

Meanwhile, as another example of the user input unit 123 , a first operation unit 123a may be provided on the rear surface of the terminal body. The first operation unit 123a is operated to receive a command for controlling the operation of the mobile terminal 100 , and the inputted contents may be variously set. For example, a command such as power on/off, start, end, scroll, etc., control of the sound output from the first and second sound output units 152a and 152b, and a touch recognition mode of the display unit 151 You can receive commands such as switching of The first manipulation unit 123a may be embodied in a form capable of input by a touch input, a push input, or a combination thereof.

The first operation unit 123a may be disposed to overlap the display unit 151 on the front side in the thickness direction of the terminal body. As an example, the first operation unit 123a may be disposed on the upper rear portion of the terminal body so that the user can easily manipulate the terminal body using his index finger when holding the terminal body with one hand. However, the present invention is not necessarily limited thereto, and the position of the first operation unit 123a may be changed.

As such, when the first operation unit 123a is provided on the rear surface of the terminal body, a new type of user interface using the first operation unit 123a can be implemented. In addition, the display unit 151 may be configured with a larger screen.

In the present invention, a technical problem may occur due to liquid penetration while a sensor package such as the operation unit 123a is mounted to be exposed on the outer surface of the mobile terminal. (see FIG. 3). The package waterproof structure 200 of the mobile terminal according to the present invention will be described in detail later.

Meanwhile, the mobile terminal 100 may be provided with a fingerprint recognition sensor for recognizing a user's fingerprint, and the controller 180 may use fingerprint information detected through the fingerprint recognition sensor as an authentication means. The fingerprint recognition sensor may be built in the display unit 151 or the user input unit 123 .

The microphone 122 is configured to receive a user's voice, other sounds, and the like. The microphone 122 may be provided at a plurality of locations and configured to receive stereo sound.

The interface unit 160 serves as a passage through which the mobile terminal 100 can be connected to an external device. For example, the interface unit 160 is a connection terminal for connection with another device (eg, earphone, external speaker), a port for short-range communication (eg, infrared port (IrDA Port), Bluetooth port (Bluetooth) Port), a wireless LAN port, etc.], or at least one of a power supply terminal for supplying power to the mobile terminal 100 . The interface unit 160 may be implemented in the form of a socket for accommodating an external card such as a Subscriber Identification Module (SIM), a User Identity Module (UIM), or a memory card for information storage.

A second camera 121b may be disposed on the rear side of the terminal body. In this case, the second camera 121b has a photographing direction substantially opposite to that of the first camera 121a.

The second camera 121b may include a plurality of lenses arranged along at least one line. The plurality of lenses may be arranged in a matrix form. Such a camera may be referred to as an 'array camera'. When the second camera 121b is configured as an array camera, an image may be captured in various ways using a plurality of lenses, and an image of better quality may be obtained.

The flash 124 may be disposed adjacent to the second camera 121b. The flash 124 illuminates light toward the subject when the subject is photographed by the second camera 121b.

A second sound output unit 152b may be additionally disposed on the terminal body. The second sound output unit 152b may implement a stereo function together with the first sound output unit 152a, and may be used to implement a speakerphone mode during a call.

At least one antenna for wireless communication may be provided in the terminal body. The antenna may be built into the terminal body or formed in the case. For example, an antenna forming a part of the broadcast reception module 111 (refer to FIG. 1 ) may be configured to be withdrawable from the terminal body. Alternatively, the antenna may be formed in a film type and attached to the inner surface of the rear cover 103 , or a case including a conductive material may be configured to function as an antenna.

The terminal body is provided with a power supply unit 190 (refer to FIG. 1 ) for supplying power to the mobile terminal 100 . The power supply unit 190 may include a battery 191 that is built into the terminal body or is detachably configured from the outside of the terminal body.

The battery 191 may be configured to receive power through a power cable connected to the interface unit 160 . In addition, the battery 191 may be configured to be wirelessly charged through a wireless charging device. The wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).

On the other hand, in this figure, the rear cover 103 is coupled to the rear case 102 to cover the battery 191 to limit the detachment of the battery 191 and to protect the battery 191 from external shocks and foreign substances. is foreshadowing When the battery 191 is detachably configured to the terminal body, the rear cover 103 may be detachably coupled to the rear case 102 .

An accessory for protecting the appearance of the mobile terminal 100 or supporting or extending a function of the mobile terminal 100 may be added. As an example of such an accessory, there may be a cover or a pouch that covers or accommodates at least one surface of the mobile terminal 100 . The cover or pouch may be configured to extend the function of the mobile terminal 100 by interworking with the display unit 151 . As another example of the accessory, there may be a touch pen for assisting or extending a touch input to a touch screen.

Hereinafter, the characteristics of the package waterproof structure 200 constituting the mobile terminal 100 according to the present invention will be described in detail with reference to FIGS. 4 to 8 . Figure 4 shows an embodiment of the package waterproof structure 200, Figure 5 shows the bottom view as an embodiment of the button unit 210 constituting the package waterproof structure 200, Figure 6 is the package As an embodiment of the substrate part 220 constituting the waterproof structure 200, a view of a portion coupled to the button part 210 is shown, and FIG. 7 is a cross-sectional view of the package waterproof structure 200, and FIG. 8 Silver represents the flow of high-temperature gas during the manufacturing process in the package waterproof structure 200 .

In this specification, the term "package" includes a sensor provided in the mobile terminal 100 and a structure (such as an IC and peripheral circuits) for implementing the sensor. The fingerprint recognition sensor unit, which is included in such a package, may perform a user authentication function after recognizing a pattern of a fingerprint.

The package is exposed on the outer surface of the mobile terminal 100 because it needs to receive a signal such as a touch from the outside. In addition, a circuit for performing a sensor function is provided in the mobile terminal. Therefore, the outer surface of the mobile terminal provided with the package is vulnerable to penetration of liquid, etc., and at the same time, the package requires a means for protecting the internal circuit from penetration of the liquid. The present inventor's mobile terminal 100 has a package waterproof structure 200 for this purpose.

The package waterproof structure 200 includes a button unit 210 , a substrate unit 220 , and a gas hole 230 (see FIG. 4 ).

The button unit 210 includes a first surface exposed to the outer surface of the mobile terminal 100 , and a second surface provided opposite the first surface and coupled to the substrate unit 220 . . In this specification, the first surface is also referred to as an 'exposed surface' and the second surface is also referred to as a 'contact surface'.

The exposed surface of the button unit 210 may function as a means for recognizing a fingerprint pattern in the mobile terminal 100 (refer to reference numeral 123a in FIG. 3 ). The shape of the exposed surface may be formed in a circular shape, but may be formed in a square or other shape according to functional or morphological needs.

A soldering structure 300 is provided on the contact surface of the button unit 210 . An IC and peripheral circuits (resistors and capacitors, etc.) for a sensor to function are provided in the button unit 210 . Since the solder unit 300 is provided on the contact surface of the button unit 210 , power for sensor operation can be supplied from the substrate unit 220 , and various communication signals and ground are provided on the substrate unit 220 . ) can be connected to the signal line provided in the

The solder part 300 may be made of a material or metal that is physically solid at room temperature so as to transmit an electrical signal and prevent the penetration of liquid when in contact with the substrate part 220 . That is, the solder part 300 is not limited to lead, but is preferably made of lead in consideration of manufacturing convenience and cost. The manufacturing process will be described in detail later.

The solder part 300 is provided on the inside of the first solder 310 and the first solder 310 formed along the edge of the contact surface of the button part 210, and functions to transmit an electrical signal. and a second solder 320 (see FIG. 5 ).

The first solder 310 may be formed in a ring shape when the button part 210 is formed in a circular shape. In this specification, the first solder 310 is also referred to as a 'ring solder'.

The first solder 310 may be closely coupled to the substrate 220 . That is, the lower surface of the first solder 310 is combined with a corresponding contact surface (refer to reference numeral 221 in FIG. 6 ) of the substrate part 220 , so that a liquid ( L) functions to be impassable (see Fig. 7). When the button part 210 is coupled to the substrate part 220 , an internal space in which the possibility of penetration of the liquid L by the first solder 310 disappears may be provided, and the internal space provided in this internal space may be provided. The second solder 320 may be stably protected from the influence of liquid penetration.

A signal line may not be formed in the substrate part 220 to which the first solder 310 is butted. That is, the first solder 310 is provided so as not to receive power from the substrate 220 or exchange communication signals. Accordingly, an electrical signal does not flow to the first solder 310 , so that a technical problem such as a short does not occur even if the liquid comes into contact with the outer surface (arrow portion of FIG. 7 ).

Meanwhile, the first solder 310 may be made of the same material as the second solder 320 . Even if the second solder 320 is made of the same material as the second solder 320 made of a material through which an electrical signal can be easily transmitted, a technical problem may not occur in the first solder 310 due to contact with the liquid. As such, since the first solder 310 is made of the same material as the second solder 320 , it is possible to reduce the manufacturing cost and improve the efficiency of the manufacturing process. Preferably, the first solder 310 may be made of the same lead material as the second solder 320 .

The second solder 320 is provided such that power is supplied from the substrate unit 220 , and various communication signals and ground can be connected to the signal lines provided in the substrate unit 220 . In detail, the second solder 320 may be closely coupled to the substrate 220 . That is, the lower surface of the second solder 320 is coupled to the corresponding contact surface (refer to reference numeral 222 in FIG. 6 ) of the substrate unit 220 , so that an electrical signal for functioning as a sensor package can be transmitted and received. In this specification, the second solder 320 is also referred to as a 'signal solder'.

When the button part 210 is formed in a circular shape, and the first solder 310 is formed in a ring shape along the edge of the button part 210 , the second solder 320 is the ring solder. It may be composed of a plurality of protrusions on the inside of the 310 . The second solder 320 may be disposed at an edge along the ring solder 310 to form a square shape (see FIG. 5 ).

The protrusion forming the second solder 320 may protrude to have the same thickness as the first solder 310 (refer to FIG. 7 ). If the protruding thickness of the second solder 320 is greater than that of the first solder 310 , there is a separation space between the substrate 220 and the button 210 in the portion where the first solder 310 is located. This may cause a problem in that the liquid L penetrates inside and comes into contact with the second solder 320 . Conversely, if the protruding thickness of the second solder 320 is smaller than that of the first solder 310 , the second solder 320 is the signal line of the substrate 220 even though the internal penetration of the liquid L is blocked. It cannot be physically contacted with the sensor, making the operation of the sensor package impossible.

The board unit 220 is located inside the mobile terminal 100 , and supplies power to the button unit 210 or receives a signal recognized by the button unit 210 to form a main board (main PCB). A signal line provided to the AP (application processor) is provided. To this end, the substrate part 220 is provided so that the contact surface of the button part 210 is coupled.

In addition, the reinforcing plate 240 may be provided on the substrate 220 so that the signal of the button 210 can be smoothly transmitted to the main board (see FIG. 4 ). As the reinforcing plate 240 is provided, a portion of the substrate 220 connected to the main board can be maintained flat.

In the substrate unit 220 , a signal line for exchanging signals is provided on the contact surface 222 corresponding to the second solder 320 of the button unit 210 . In the substrate unit 220 , a signal line is not present on the contact surface 221 corresponding to the first solder 310 of the button unit 210 , but is formed to be completely in close contact with the first solder 310 .

A gas hole 230 is provided in the substrate 220 (refer to FIG. 4). When the button unit 210 is coupled to the substrate unit 220 , the gas hole 230 is provided on the inside based on a contact portion corresponding to the first solder 310 of the button unit 210 . can be Since the gas hole 230 is provided, the high-temperature gas G in the internal space provided by the first solder 310 can stably escape in a manufacturing process to be described later (see FIG. 8 ).

The gas hole 230 may be provided at a central position with respect to the ring solder 310 so that the signal solder 320 may be disposed adjacently along the ring solder 310 . That is, the gas hole 230 formed in the substrate part 220 may be provided in the center with respect to the ring solder 310 when the button part 210 is coupled (see FIG. 7 ).

In the process of manufacturing the package waterproof structure 200 provided in the mobile terminal 100 of the present invention, the solder unit 300 is made of a lead material and can be mounted on the button unit 100 and the substrate unit 200 . have. Lead to constitute the solder part 300 is first applied to the substrate part 200 at the intended position in a solder cream state, and then, in a state where the button part 100 is placed, a high temperature of 190 to 260 degrees Celsius It goes through a reflow process that returns to room temperature through the environment. At this time, the lead in the solder cream state is converted to a liquid-like state in a high-temperature environment, and then solidifies into solid lead at room temperature.

A high-temperature gas G is generated inside the package waterproof structure 200 by the high-temperature environment of the reflow process. In particular, since the high-temperature gas (G) generated in the inner space of the first solder 310 of the package waterproof structure 200 is in a high-pressure state compared to the external atmospheric pressure, the remaining solder part 300 that cannot withstand it is inevitably damaged. there will be no

Accordingly, since the gas hole 230 is provided in the substrate 220, the high-temperature gas G under high pressure can be stably discharged out of the package waterproof structure 200, and thus the solder part 300 of the reflow process. ) to prevent damage. Accordingly, a means for actually implementing a waterproof structure using the solder unit 300 in a surface mount technology (SMT) manufacturing process is provided.

A waterproof tape 250 is provided on the substrate 220 (see FIG. 7 ). The waterproof tape 250 is provided to be attached to the opposite side of the surface to which the button part 210 is coupled. By attaching the waterproof tape 250 , it is possible to prevent the liquid from penetrating into the gas hole 230 . That is, since the waterproof tape 250 is provided on the opposite surface of the substrate part 220 , the internal space in which the signal solder 320 is provided can be physically blocked. At the same time, the waterproof tape 250 may be provided so that the package waterproof structure 200 is attached to the inner surface of the mobile terminal 100 .

The waterproof tape 250 is attached after the reflow process is completed in the manufacturing process of the package waterproof structure 200 . Accordingly, the signal transmission area between the button unit 210 and the substrate unit 220, which is a part to be waterproofed, can be completely protected from liquid.

As such, the mobile terminal 100 according to the present invention includes the package waterproof structure 200 to block the penetration of liquid into the signal transmission region of the package. If the package is a fingerprint recognition sensor unit, when liquid penetrates, the signal line for the fingerprint sensor and the power supply line necessary for operation short each other, resulting in malfunction, as well as system off, malfunction and heat generation at the mobile terminal level. It can cause serious problems such as By providing the package waterproof structure 200 , it is possible to prevent such a technical problem due to liquid penetration.

In addition, according to the present invention, the package waterproof structure 200 can be implemented only by the SMT manufacturing process. Accordingly, since a separate process for manufacturing the waterproof structure is not required, it is possible to reduce cost or process time, and it is possible to prevent a disadvantage in that the thickness of the component is increased due to the addition of the waterproof member.

Furthermore, according to the present invention, the package waterproof structure 200 can be completely inspected through non-destructive inspection using x-rays, etc., so that the waterproof inspection of the mobile terminal 100 is facilitated.

It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

The above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

100: mobile terminal
120: input unit
123a, 123b: operation unit
200: package waterproof structure
210: button part
220: substrate part
230: gas hole
240: reinforcement plate
250: waterproof tape
300: solder part
310: first solder
320: second solder

Claims (6)

In the mobile terminal having a package waterproof structure,
The package waterproof structure,
a button unit having one surface exposed on the outer surface of the mobile terminal and receiving a user's signal;
a substrate unit located inside the mobile terminal and coupled to the button unit to exchange electrical signals with the button unit;
a solder portion provided between the button portion and the substrate portion and including a first solder formed along an edge of the button portion and a second solder provided inside the first solder to transmit an electrical signal; and
The mobile terminal including a gas hole formed in the substrate portion, the gas hole is formed to be located inside the first solder.
According to claim 1,
The substrate part,
A mobile terminal in which a signal line is provided only in a portion in contact with the second solder among portions in contact with the solder portion.
3. The method of claim 2,
The solder portion is a mobile terminal composed of a lead material.
4. The method of claim 3,
The first solder and the second solder are made of the same lead material.
According to claim 1,
A mobile terminal to which a waterproof tape is attached to the opposite side of the surface to which the button unit is coupled in the substrate unit.
According to claim 1,
One side of the button part,
A mobile terminal that functions to receive a user's fingerprint pattern.

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