KR101333156B1 - Method of manufacturing fingerprint recognition home key in mobile apparatus using plasm treatment - Google Patents

Abstract

Disclosed is a manufacturing method of a fingerprint recognition home key for a mobile device using the plasma surface treatment, capable of improving the quality by performing the plasma surface treatment before each step is processed when coating a primer, a shielding layer, a painting, and a UV top coat on a fingerprint recognition sensor after injection-molding a home key for a mobile device. The manufacturing method of a fingerprint recognition home key for a mobile device according to one embodiment of the present invention comprises: a step of forming a primer layer on a fingerprint recognition sensor after injection-molding a home key, a step of performing a first plasma surface treatment on the primary layer, a step of forming a shielding layer on the top in which the first plasma surface treatment has been performed, a step of performing a second plasma surface treatment on the shielding layer, a step of forming a painting layer on the top in which the second plasma surface treatment has been performed, and a step of performing a third plasma surface treatment on the painting layer. [Reference numerals] (AA) Start;(BB) End;(S100) Perform a plasma surface treatment on the PI film on the upper part of a fingerprint recognizing sensor;(S200) Form a primer layer;(S300) Perform the plasma surface treatment on the primer layer;(S400) Form a shielding layer;(S500) Perform the plasma surface treatment on the shielding layer;(S600) Form a painted layer;(S700) Perform the plasma surface treatment on the painted layer;(S750) Form a urethane layer;(S780) Perform the plasma surface treatment on the urethane layer;(S800) Form a UV layer

Description

Method of manufacturing fingerprint recognition home key using plasma surface treatment {METHOD OF MANUFACTURING FINGERPRINT RECOGNITION HOME KEY IN MOBILE APPARATUS USING PLASM TREATMENT}

The present invention relates to a method for manufacturing a fingerprint recognition home key of a portable device using a plasma surface treatment, and more particularly, to a primer, a shielding layer, a painting, and a UV image on a fingerprint recognition sensor after injection molding a home key of a portable device. It is possible to improve the quality by performing the plasma surface treatment before (or after) each step, and in appearance, it is not possible to recognize whether the fingerprint sensor is equipped, but in reality, the plasma surface treatment with the fingerprint recognition function of the user Disclosed is a method for manufacturing a fingerprint recognition home key of a portable device.

Fingerprint recognition technology is a technique that is mainly used to prevent various security incidents by going through user registration and authentication procedures. In particular, it is a technology applied to personal and organizational network defense, protection of various contents and data, and secure access control.

2. Description of the Related Art In recent years, as the number of users of various portable devices including smartphones and tablet PCs has surged, personal information and contents stored in and stored in a portable device have frequently been leaked to the outside.

In the case of the conventional mobile phone, it has been used only for the purpose of making a voice call, and in the case of a personal computer, it has been placed in the home or office, and only a few users have been provided.

However, recently developed smart phones and tablet PCs have been manufactured in a compact form that can be carried by users anytime, anywhere, away from the limited use of conventional mobile phones and personal computers, It is a concept of necessity to carry around.

However, with the development of mobile technology and the development of computing devices, portable devices such as smartphones and tablet PCs are built into existing PCs with large data storage media, high performance arithmetic units, and high speed communication modules. It was possible to perform the tasks that were done.

If such a portable device is lost or handed over to the hands of a malicious person, there is a risk that information that requires security maintenance such as various personal information and business secrets may be leaked to an unspecified third party.

In addition, there are many cases where personal financial transactions are carried out using a portable device, and when personal financial information is leaked to another person, a risk of serious financial accidents may occur.

Although fingerprint recognition function has been applied to some portable devices such as smart phones and notebooks, fingerprint recognizers are attached to the device so that they can be visually recognized.

Therefore, the present invention proposes a manufacturing method in which the fingerprint recognition device is invisible in appearance, and solves the problem of security and aesthetic weakness.

Figure 1 shows a representative example of a portable device, Figure 1 (a) is a simplified illustration of a mobile phone, Figure 1 (b) is a simplified illustration of a tablet PC.

As shown in FIG. 1 (a), in a recently released cellular phone 10, a large-area display device 13 is provided at the front center of the main body 11, and the display device 13 has a complex key The touch drive method is applied beyond the pad structure.

And a home key H is provided at the bottom of the front of the mobile phone 10. [ The home key H realizes various functions of the cellular phone 10 in a one-touch manner, thereby improving usability.

1B, the tablet PC 20 is provided with a display device 23 that can be touch-driven to the front center of the main body 21, similar to the above-described mobile phone, and the main body 21 Is provided with a groove key (H)

In this way, in a mobile phone or a tablet PC, a home key (H) realizes an operation set through a portable device. For example, when a home device (H) is pressed or touched during the use of a portable device, Function.

However, in the case of the portable device introduced to date, as described above, the function and arrangement of the home key provided in the majority of devices are limited to each other in a similar form, and when a security technology such as user authentication is applied. Was rare.

There are two methods of fingerprint recognition, optical and electrostatic. Optical fingerprint recognition technology is a method in which strong light is shot on a fingerprint and then the image of the reflected fingerprint is converted into an electrical signal.

In addition, the electrostatic fingerprint recognition technology uses the electrical conductivity of the skin to read the unique shape of the fingerprint that is different for each user as an electrical signal.

The capacitive fingerprint sensor is provided with an ASIC coupled to a small flexible printed circuit board (FPCB), which is suitable for embedded in the home key of a portable device.

Accordingly, the development of a technology that enables the user fingerprint recognition through the home key provided in the portable device by embedding a fingerprint recognition sensor of the FPCB module type of the electrostatic method in the home key.

Prior art relating to the present invention is Korean Patent Laid-Open Publication No. 2002-0016671 (published on Mar. 06, 2002), which discloses a portable information terminal having a fingerprint recognition module and a control method thereof Lt; / RTI >

The present invention is provided in a portable device including a portable terminal such as a smart phone, a tablet PC, etc., the user can not visually recognize whether the fingerprint recognition sensor is mounted, but in reality, to manufacture a home key having a fingerprint recognition function of the user It provides a fingerprint recognition home key manufacturing method of a portable device.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned here can be understood by those skilled in the art from the following description.

Method of manufacturing a fingerprint recognition home key of the portable device using the plasma surface treatment according to an embodiment of the present invention, (a) forming a primer layer on top of the fingerprint recognition sensor after injection molding of the home key; (b) subjecting the primer layer to primary plasma surface treatment; (c) forming a shielding layer on top of the first plasma surface treatment; (d) subjecting the shielding layer to secondary plasma surface treatment; (e) forming a paint layer on top of the secondary plasma surface treatment; And (f) subjecting the painting layer to a third plasma surface treatment.

Before the step (a), after the injection molding of the home key, the plasma surface treatment may be performed on the PI film provided on the fingerprint recognition sensor.

After the step (f), further comprising the step of forming a urethane layer on top of the painting layer, and forming a UV layer on top of the urethane layer.

After the step of forming the urethane layer, the urethane layer further comprises the step of selectively performing a plasma surface treatment.

The material of the primer layer is characterized in that the urethane or UV coating material.

The shielding layer may be formed using a paint of a color selected according to the color of the portable device, and after the shielding layer is formed, the fingerprint recognition sensor may not be exposed in appearance.

According to an embodiment of the present invention, by providing a home key having a fingerprint recognition function, it is possible to secure the user authentication and security functions of a portable device such as a mobile phone, a tablet PC.

As a result, external leakage of data such as personal information and content stored in the portable device can be prevented, and secure access control can be enabled.

In particular, according to an embodiment of the present invention, in laminating a primer layer, a shielding layer, and a painting layer on top of a fingerprint sensor after injection molding of a home key, plasma surface treatment is performed before (or after) each of these lamination steps. I can do it.

Accordingly, it is possible to prevent the coating material from being separated from the adhesive surface by increasing the adhesive force between different materials, to form a thin layer thickness of each layer, and to improve the lamination quality.

In addition, after the plasma surface treatment, primers can be applied for coating, shielding layer formation, painting, UV coating, etc., thereby obtaining a cleaning effect, thereby reducing the process of cleaning the surface, and effectively forming each coating layer while forming a thin thickness. You can.

Accordingly, provided in a portable device including a portable terminal such as a smart phone, a tablet PC, etc., the user may not visually recognize whether the fingerprint recognition sensor is mounted, but may actually have a fingerprint recognition function of the user.

1 is a view schematically showing a mobile phone and a tablet PC as a specific example of a general portable device.
Figure 2 is a flow chart of a fingerprint recognition home key manufacturing method of a portable device according to an embodiment of the present invention.
Figure 3 is a process diagram of a fingerprint recognition home key manufacturing method of a portable device according to an embodiment of the present invention.
Figure 4 is a detailed process of the fingerprint recognition home key manufacturing method of a portable device according to an embodiment of the present invention.
5 is a flowchart illustrating a method for manufacturing a fingerprint recognition home key of a portable device according to a first embodiment of the present invention.
6 is an overall process diagram of a fingerprint recognition home key manufacturing method of a portable device according to a first embodiment of the present invention;
7 is a flowchart illustrating a fingerprint recognition home key manufacturing method of a portable device according to a second embodiment of the present invention.
8 is an overall process diagram of a fingerprint recognition home key manufacturing method of a portable device according to a second embodiment of the present invention;
9 is an exemplary view showing various shapes of the molded body after the first injection of the fingerprint recognition home key manufacturing method of the portable device according to the second embodiment of the present invention.
10 and 11 are views showing a state before and after the decoration of the decorative parts on the fingerprint recognition home key of the portable device according to the first and second embodiments of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning and the inventor shall appropriately define the concept of the term in order to best explain its invention It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. It should be noted that the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It should be understood that various equivalents and modifications are possible.

Hereinafter, a method of manufacturing a fingerprint recognition home key of a portable device using plasma surface treatment according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a flow chart of a fingerprint recognition home key manufacturing method of a portable device using a plasma surface treatment according to an embodiment of the present invention.

There are two types of plasma treatment: atmospheric pressure and vacuum. In particular, the vacuum method is a method of processing a plasma in a vacuum state. The vacuum method is an Ar gas or CF + O2 for facilitating plasma formation and increasing cleaning and adhesion. Use a mixed gas such as + N 2 or O 2 + N 2 + Ar.

Referring to Figure 2, it will be described in detail for each step.

PI film plasma surface treatment step of the fingerprint sensor (S100)

This step is to perform a plasma surface treatment on the PI film provided in the fingerprint recognition sensor on the injection molded by the home key.

3 and 4 (a), it can be seen that plasma surface treatment is performed on the FPCB 110 provided in the fingerprint recognition sensor 100 of the injection molded product 300. FPCB can be made of a PI film material, in particular, it can be understood specifically as a plasma surface treatment step for the PI film.

This step allows the primer to be applied well and thinly in the subsequent step of forming the primer layer.

Primer layer forming step (S200)

In this step, the surface of the PI film of the fingerprint sensor, that is, FPCB, is subjected to plasma surface treatment, and then a primer is applied to the upper surface thereof.

3 and 4 (b), first, a plasma surface treatment is performed on the upper part of the PI film of the fingerprint recognition sensor 100, and then a primer layer 410 is formed thereon, that is, the primer is applied. can confirm.

In consideration of the fact that the shielding layer 420 is hardly attached to the FPCB of the PI material, the primer layer 410 serves to improve the adhesion performance of each other. The material of the primer to be applied in this step may be used such as urethane or UV coating material.

Primer layer plasma surface treatment step (S300)

This step is to perform a plasma surface treatment for the primer layer applied to the fingerprint sensor.

Referring to FIG. 4C, it can be seen that plasma surface treatment is performed on the applied primer layer 410. This step allows the shielding layer to be formed well and thinly in the subsequent step of forming the shielding layer.

Shielding layer forming step (S400)

This step is to perform a plasma surface treatment on the primer layer in the previous step, and then to form a shielding layer thereon.

3 and 4 (d), the shielding layer 420 is formed on the plasma surface-treated primer layer 410.

As the shielding layer 420 is implemented as a color of a device using a fingerprint recognition home key, such as carbon black ink or white ink, a paint may be used to prevent the fingerprint recognition sensor from being apparent.

Shielding layer plasma surface treatment step (S500)

This step is to perform plasma surface treatment on the shielding layer.

Referring to FIG. 4E, the primer layer 410 and the shielding layer 420 are formed on the FPCB of the fingerprint recognition sensor, that is, the PI film 110, and the shielding layer 420 is formed in this step. Plasma surface treatment is carried out.

In this step, the plasma surface treatment allows the paint to be formed well and thinly in the subsequent step of forming the paint layer.

Paint layer forming step (S600)

This step is to perform a plasma surface treatment on the shielding layer in the previous step, and then to form a paint layer on top thereof, that is, to perform a painting operation.

Referring to FIGS. 3 and 4 (f), it can be seen in detail how the paint layer 430 is formed on the shield surface layer 420 that has been treated with plasma.

By the coating layer forming step, a color may be given to the fingerprint recognition home key as a color (for example, black or white) according to a worker's selection or a request of a consumer.

Paint layer plasma surface treatment step (S700)

This step is to perform plasma surface treatment on the paint layer.

Referring to Figure 4 (g), the plasma surface treatment is performed on top of the paint layer 430 formed in the previous step.

In this step, the plasma surface treatment allows the UV layer to be formed well and thinly in the subsequent UV layer formation step.

Urethane layer forming step (S750)

This step is to apply a urethane coating on top of the plasma surface-treated paint layer in the previous step.

Referring to FIGS. 3 and 4 (h), it can be seen that the urethane layer 435 is formed on the upper portion of the paint layer 430.

The urethane layer 435 prevents UV from penetrating or depositing the paint layer.

Urethane layer plasma surface treatment step (S780)

This step is to perform a plasma surface treatment for the urethane layer formed in the previous step.

Referring to (i) of FIG. 4, the plasma surface treatment is performed to the upper portion where the urethane layer 435 is formed.

 UV layer forming step (S800)

This step is a step of forming a UV layer on top of the plasma surface-treated urethane layer in the previous step.

3 and 4 (j), it can be seen that the UV layer 440 is sequentially stacked on the urethane layer 435.

The UV layer 440 imparts gloss and hardness to the surface.

Next, two embodiments of a fingerprint recognition home key manufacturing method of a portable device using plasma surface treatment will be described with reference to FIGS. 5 to 8.

Prior to the manufacturing method of the fingerprint recognition home key of the portable device using the plasma surface treatment described above with reference to FIGS. 2 to 4, the fingerprint recognition home key is provided as one injection molding including the fingerprint recognition sensor through several injections.

5 is an overall flowchart of a method of manufacturing a fingerprint recognition home key of a portable device according to the first embodiment of the present invention, and FIG. 6 is an overall process diagram.

The injection method of the fingerprint recognition home key illustrated in FIGS. 5 and 6 may include preparing a fingerprint recognition sensor (S10), a first injection step (S20), attaching a fingerprint recognition sensor (S30), and a second injection step. (S40).

First, the fingerprint recognition sensor providing step (S10) performs a step of providing a fingerprint recognition sensor.

Referring to FIG. 6A, the ASIC 105 of the fingerprint recognition sensor 100 converts the detected analog data into a digital signal, and the FPCB 110 having a pattern for recognizing a fingerprint is formed. Electrically connected.

Here, the fingerprint recognition sensor 100 uses an electrostatic method, and reads an electrical signal having a shape inherent in different fingerprints for each user using the electric conduction characteristics of the skin.

Next, the first injection step (S20) is performed.

In this step, the first injection is injected. Here, the primary injection molding is a member manufactured through a primary injection operation so as to have a receiving groove in which the fingerprint recognition sensor may be seated and accommodated in the inner center.

In particular, in the case of the primary injection molded product provided through the primary injection operation in this step, a plurality of holes are provided in which accommodation grooves are positioned at intervals from each other.

Referring to Figure 6 (b), it can be seen the cross-sectional structure of the primary injection molding 200 provided through the primary injection operation. The primary injection molding 200 has a receiving groove 210 recessed downward through the top surface. The fingerprint recognition sensor 100 is seated through the accommodating groove 210 to achieve a smooth coupling with each other.

In addition, the primary injection molding 200 provided in this step includes a plurality of holes 231 penetrating up and down in the receiving groove 210.

One hole 231a (hereinafter referred to as a “first hole”) is a clearance space between the primary injection molding 200 and the fingerprint recognition sensor attached to the receiving groove of the primary injection during the secondary injection, which will be described later. It acts as a passage for injection. The second hole 231b (hereinafter referred to as a “second hole”) is different from the first hole 231a in which the injection material and the gas injected into the clearance space during the second injection, which will be described later, fill the clearance space. It plays the role of a passage that is discharged afterwards.

In the first injection, the injection material uses a resin material. As a specific example, a plastic polymer compound such as PC, PC glass, ABS, PP, PET, nylon, or the like may be used. Such injection material can be used equally in the second injection.

Next, the step (S30) to attach the fingerprint recognition sensor to the primary injection molding.

As a specific example, an adhesive or an adhesive may be applied to the accommodating groove of the primary injection molded product, or a double-sided tape may be attached. Then, the fingerprint recognition sensor is seated and fixed with an accommodating groove to which an adhesive or an adhesive is applied or a double-sided tape is attached.

Referring to (c) of FIG. 6, the adhesive groove P or the adhesive P may be previously applied to a portion where the receiving groove 210 and the fingerprint recognition sensor 100 of the first injection molding face each other, or the double-sided tape P may be used. Attached in advance, the fingerprint recognition sensor 100 is seated on the upper portion of the receiving groove 210 to attach to each other.

However, a predetermined clearance space 210a may be generated between the side of the accommodating groove 210 and the fingerprint recognition sensor 100. When the primer space 210a is applied to the primer on the fingerprint recognition sensor, the space may be a space where the primer penetrates, which may cause product defects.

Therefore, in the previous step (S20) to provide a plurality of holes 231 in the receiving groove 210 of the primary injection molding, so that the injection solution is injected or discharged through the plurality of holes 231 during the second injection After the second injection, the clearance space 210a may be blocked.

Next, the second injection step (S40) is performed.

This step is to perform a second injection molding operation to shape the overall shape of the fingerprint recognition home key using the vessel to which the fingerprint recognition sensor is attached.

Referring to the cross-sectional shape and the planar shape shown in Figure 6 (d), through the second injection of this step is injected again to form a portion 330 slightly covering the edge side of the FPCB 110 of the fingerprint recognition sensor. . This structurally reinforces the fixed state of the FPCB 110 to which the fingerprint recognition sensor is attached.

In addition, the end of the fingerprint recognition sensor 100 protrudes around the outer vessel of the vessel attached through the receiving groove is formed, this end to prevent the primer applied to the upper portion of the fingerprint recognition sensor to flow out.

The injection solution used in the second injection in this step may be the same as the injection solution used in the first injection described above, it may be used as an injection material made of at least one material selected from the plastic polymer compound as a specific example.

After this step, the detailed steps described with reference to FIGS. 2 to 4 may be performed. Hereinafter, since the steps S100 to S800 are described in detail above, redundant description thereof will be omitted.

7 is an overall flowchart of a method of manufacturing a fingerprint recognition home key of a portable device according to a second embodiment of the present invention, and FIG. 8 is an entire process diagram.

7 and 8, the method of manufacturing a fingerprint recognition home key includes a first injection step S10 and a second injection step S20.

In particular, the present invention may have two embodiments corresponding to the first injection step (S10), as one embodiment can be molded by injection molding the fingerprint sensor, the fingerprint as another embodiment It may include a case of molding the primary injection molding by applying an adhesive or adhesive material to the recognition sensor.

First, the first injection step (S10) is performed.

In this step, the first injection molded fingerprint sensor is first injected to mold the first injection, or the first injection molded product is formed by applying an adhesive or adhesive material, specifically, a thermosetting resin or tape, to the fingerprint recognition sensor.

Referring to FIG. 8A, the ASIC 105 of the fingerprint recognition sensor 100 converts the detected analog data into a digital signal, and the FPCB 110 has a pattern for recognizing a fingerprint. Electrically connected.

Here, the fingerprint recognition sensor 100 uses an electrostatic method, and uses the electrical conductivity of the skin to read the electrical signal in the shape of the fingerprint different for each user.

In this step, the thermosetting resin (or tape) 120 is provided on the surface of the prepared fingerprint recognition sensor 100. This is to ensure a tighter contact between the primary injection and the fingerprint recognition sensor 100 through the primary injection.

8 (b), an open flow path 230 communicating with the outside may be formed between the primary injection molding 200 and the fingerprint recognition sensor 100.

The opening flow path 230 prevents the first injection molding from separating the fingerprint sensor and the injection molding by thermal expansion, and prevents the space from being generated. Fill the injection material into the clearance space around the fingerprint sensor 100 through the flow path, and serves to facilitate the discharge of gas during injection.

That is, the fingerprint recognition sensor 100 serves to more firmly adhere to the gap between the fingerprint recognition sensor and the primary injection molding to prevent play or cracks.

In addition, when the volatile material is absorbed in the boundary between the injection, PI film, PI film and the injection, when the primer is applied, the open flow path 230 serves to maintain a good flatness of the primer.

However, the open flow path 230 may have various embodiments. Such an embodiment can be confirmed with reference to FIG.

Referring to FIG. 9A, the opening flow path 230 of the primary injection molding 200 may include a plurality of holes 231 penetrating the primary injection molding 200 up and down, and primary injection moldings from the plurality of holes. It includes a connection hole 233 communicated in both directions of the 200. In addition, the opening flow path 230 formed by each hole 231 and the connection hole 233 is in communication with the outside in different directions.

Referring to FIGS. 9B and 9C, the opening flow path 230 of the primary injection molding 200 has a connection hole 233 connecting each of the plurality of holes 231 to communicate with the outside as a whole. consist of. And it penetrates in the up-down direction of the primary injection molding and communicates with the outside.

According to such a structure, an open flow passage communicating with the outside is provided between the first injection molding 200 and the fingerprint recognition sensor 100, and the injection solution is directed toward the fingerprint recognition sensor 100 during the second injection through the open flow passage. It can be filled to strengthen the tightness. In addition, the smooth discharge of internal air can prevent cracking and deformation due to infiltration of primers.

Next, the second injection step S20 is performed. Previously, the molded article injected after the first injection step is a step of injecting the entire home key shape.

Referring to FIG. 8C, the cross-sectional structure of the fingerprint recognition home key 300 after the second injection may be confirmed. In particular, the injection through the second injection so that a portion 330 slightly covering the edge of the FPCB 110 of the fingerprint recognition sensor is formed. This structurally reinforces the fixed state of the FPCB 110 to which the fingerprint recognition sensor is attached.

Next, FIGS. 10 and 11 are views illustrating a state before and after the decor parts are assembled on the fingerprint recognition home keys of the portable device according to the first and second embodiments of the present invention.

According to the first embodiment of the present invention, as shown in Figure 10 (a), after the completion of the coating of the UV layer, the ring-shaped through the coupling hole 340 provided in the fingerprint recognition home key 300 Deco component 500 is assembled. And the planar shape of the fingerprint recognition home key 300, the deco component 500 is assembled to the upper surface is as shown in (b) of FIG.

However, the shape of the deco component 500 does not necessarily need to be limited to the illustrated form, and may be changed to various forms.

On the contrary, according to the second embodiment of the present invention, the fingerprint recognition home key 300 completed until the coating of the UV layer, as shown in (a) of FIG. 11 has a deco component 500 having a coupling hole 500a. Is assembled on. In addition, the size and shape of the illustrated deco part 500 may also be implemented in a slightly different form.

As described above, according to an embodiment of the present invention, by providing a home key having a fingerprint recognition function, it is possible to secure the user authentication and security functions of a portable device such as a mobile phone, a tablet PC.

As a result, external leakage of data such as personal information and content stored in the portable device can be prevented, and secure access control can be enabled.

In particular, according to an embodiment of the present invention, in laminating a primer layer, a shielding layer, a paint layer, and a UV layer on top of a fingerprint sensor after injection molding of a home key, plasma surface treatment may be performed before each lamination step. Can be.

Accordingly, it is possible to prevent the coating material from being separated from the adhesive surface by increasing the adhesive force between different materials, to form a thin layer thickness of each layer, and to improve the lamination quality.

In addition, after the plasma surface treatment, primers can be applied for coating, shielding layer formation, painting, UV coating, etc., thereby obtaining a cleaning effect, thereby reducing the process of cleaning the surface, and effectively forming each coating layer while forming a thin thickness. You can.

Accordingly, provided in a portable device including a portable terminal such as a smart phone, a tablet PC, etc., the user may not visually recognize whether the fingerprint recognition sensor is mounted, but may actually have a fingerprint recognition function of the user.

The fingerprint recognition home key manufacturing method of the portable device using the plasma surface treatment according to an embodiment of the present invention has been described above.

It is to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and the scope of the present invention will be indicated by the appended claims rather than by the foregoing detailed description. It is intended that all changes and modifications that come within the meaning and range of equivalency of the claims, as well as any equivalents thereof, be within the scope of the present invention.

S100: PI film plasma surface treatment of fingerprint sensor
S200: forming the primer layer
S300: primer layer plasma surface treatment
S400: shielding layer formation
S500: shielding layer plasma surface treatment
S600: Paint layer formation
S700: paint layer plasma surface treatment
S750: urethane layer formed
S780: urethane layer plasma surface treatment
S800: UV layer formation

Claims (6)

(a) forming a primer layer on top of the fingerprint sensor after injection molding of the home key;
(b) subjecting the primer layer to plasma surface treatment;
(c) forming a shielding layer on top of the primer layer;
(d) subjecting the shielding layer to plasma surface treatment;
(e) forming a paint layer on top of the shielding layer;
(f) subjecting the paint layer to plasma surface treatment;
(g) forming a urethane layer on top of the paint layer; And
(h) forming a UV layer on top of the urethane layer; fingerprint recognition home key manufacturing method of a portable device using a plasma surface treatment comprising a.
The method of claim 1,
Before the step (a)
Method of manufacturing a fingerprint recognition home key of a portable device using a plasma surface treatment to perform a plasma surface treatment on the PI film provided on the fingerprint recognition sensor after the injection molding of the home key.
delete The method of claim 1,
After forming the urethane layer,
A method of manufacturing a fingerprint recognition home key for a portable device using a plasma surface treatment further comprising the step of performing a plasma surface treatment on the urethane layer.
The method of claim 1,
The primer layer is made of a urethane or UV coating material characterized in that the fingerprint recognition home key manufacturing method of a portable device using a plasma surface treatment.
The method of claim 1,
The shielding layer is formed using a paint of a color selected according to the color of the portable device,
The fingerprint recognition home key manufacturing method of the portable device using the plasma surface treatment to make the fingerprint sensor hidden in appearance after the shielding layer is formed.

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