KR20060083458A - Keypad of portable appliance and thereof manufacturing method - Google Patents

Abstract

According to the present invention, the key sheet 60 set on the pad 70 is designed to implement the font 61 and the three-dimensional pattern 62 together with the surface corrosion of the metal thin film G, thereby providing a light source provided through the font 61. By cooperating with the three-dimensional pattern 62 made of the three-dimensional waveform, it is possible to more beautifully express the dazzling aesthetics of the light by scattering and refraction, while changing three-dimensionally according to the viewing angle of the key sheet 60, The present invention relates to a keypad for a portable terminal and a method for manufacturing the same, which can produce a texture.

Description

KEYPAD OF PORTABLE APPLIANCE AND THEREOF MANUFACTURING METHOD}

1 is a perspective view showing a product to which a keypad for a portable terminal according to the prior art is applied.

2 is a cross-sectional view of a dome switch and a circuit board showing a keypad for a portable terminal according to the prior art.

Figure 3 is a process diagram showing a keypad manufacturing method for a portable terminal according to the prior art.

Figure 4 is a perspective view showing a product to which a keypad for a mobile terminal according to the present invention is applied.

Figure 5 is a sectional view including a dome switch and a circuit board showing a keypad for a mobile terminal according to the present invention.

Figure 6 is a photograph showing a key sheet applied to the keypad for another mobile terminal in the present invention.

7 is a process chart showing a keypad manufacturing method for a portable terminal according to the present invention.

       Explanation of symbols on the main parts of the drawings

60: key sheet 61: font

62: solid pattern 63: plating layer

64: protective layer 70: pad

71: projection 80: printing surface

100: keypad D: dome switch

H: Circuit board L: Lamp

F: front housing G: metal thin film

PR: Photoresist M: Mask

The present invention relates to a keypad for a mobile terminal and a method of manufacturing the same. More particularly, the light source provided through a font is designed to implement a font and a three-dimensional pattern together with the surface of the metal film on the key sheet set on the pad. The present invention relates to a keypad for a portable terminal and a method of manufacturing the same, which can be more beautifully expressed by scattering and refraction while cooperating with a pattern.

In general, a keypad for a portable terminal is applied to a portable terminal including a home telephone, a PDA, a cellular phone, and the like, and is used as a switching member for generating a signal in association with a circuit board.

The keypad for the portable terminal introduced below will be described as an example for the convenience of the keypad for a cellular phone, and the present invention is not limited thereto.

1 is a perspective view showing a product to which a keypad 50 for a portable terminal according to the prior art is applied, and FIG. 2 is a dome switch D and a circuit board H showing the keypad 50 for the portable terminal according to the prior art. It is a cross section included.

The keypad 50 for a portable terminal according to the related art is provided with a font 12 on a key top 11 exposed to the outside through the hole F1 of the front housing F, as shown in FIGS. 1 and 2. Based on the key 10 and the pad 20 seated into the front housing F, a printing surface 30 printed in various colors is provided between the key 10 and the pad 20, and the pad Below the 20, the dome switch D is positioned to have a feeling of operation of the key 10, and the protrusion 21 formed on the lower surface of the pad 20 presses the dome switch D to press the circuit board H. It is designed to generate a signal by touching the contact point H1.

3 is a process chart showing a keypad manufacturing method for a portable terminal according to the prior art.

In the method for manufacturing a keypad for a portable terminal according to the prior art, as shown in FIG. 3, first, a liquid transparent thermoplastic resin is added to a mold having a key shape, and then cured for a predetermined time to prepare a key top 11 (S1). The lower surface of the key top 11 is provided with a printing surface 30 of various colors (S2).

After the powder coating is applied to the surface of the key top 11 by spraying, a font 12 composed of symbols, letters, numbers, etc. is applied by laser marking to produce a key 10 (S3). The keypad 50 may be completed by attaching the key 10 to the pad 20 having the protrusion 21 (S4).

However, the keypad for a mobile terminal according to the related art as described above and a method for manufacturing the same are manufactured by separately manufacturing the key top 11 with a thermoplastic resin, and laser marking a font 12 made of symbols, letters, numbers, etc. ), The productivity is greatly reduced due to the complex process and the process of completing), and the key 10 exposed to the outside of the front housing F is composed of only a functional structure for giving the font 12. There was a disadvantage which was not very satisfactory for the preferred consumers.

Accordingly, the present invention has been made to solve the above problems, and its object is to provide a light source provided through a font by designing a key sheet set on a pad to implement a font and a three-dimensional pattern together with surface corrosion of a metal thin film. By cooperating with the three-dimensional pattern of this three-dimensional waveform, scattering and refraction can express the dazzling aesthetics of light more beautifully, while applying photoresist to the metal thin film, exposing, developing and etching to produce delicate and precise fonts and three-dimensional patterns. The present invention provides a keypad for a portable terminal and a method of manufacturing the same.

Keypad for a mobile terminal according to the present invention for achieving the above object

It is a basic feature of the technical configuration that includes a key sheet having a font and a three-dimensional pattern provided on the pad and provided by surface corrosion of the metal thin film.

Method for manufacturing a keypad for a portable terminal according to the present invention for achieving the above object.

In the method for manufacturing a keypad for a mobile terminal comprising a key sheet located on the pad,

The key sheet

Preparing a metal thin film,

Applying a photosensitive resin to the metal thin film,

Irradiating light while placing a mask on the photosensitive resin;

Dissolving the uncured photoresist with a developer and developing the font and three-dimensional pattern;

Etching the metal thin film exposed in the font and three-dimensional pattern with a corrosion solution;

Removing the photosensitive resin remaining on the upper portion of the metal thin film with a peeling liquid,

Providing a plating layer for imparting gloss to the metal thin film,

Comprising a step of providing a protective layer for coating and protecting the plating layer is a basic feature of the technical method.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings, and through these embodiments, the objects, features, and advantages of the present invention can be more easily understood.

The present invention is designed to implement the font 61 and the three-dimensional pattern 62 together with the key sheet 60 set on the pad 70, which is the configuration of the keypad 100, by the surface corrosion of the metal thin film G. 4 is a perspective view showing a product to which the keypad 100 for a portable terminal according to the present invention is applied, and FIG. 5 is a dome switch D and a circuit board (H) showing the keypad 100 for a portable terminal according to the present invention. It is a cross section including.

The keypad 100 for a portable terminal according to the present invention is provided in the front housing F having a lamp L for providing a light source, as shown in FIGS. 4 and 5, and is placed on the dome switch D to form a protrusion ( A pad 70 having a 71, and a key sheet 60 having a font 61 and a three-dimensional pattern 62 provided by surface corrosion of the metal thin film G together.

The metal thin film G may be selected from a metal disc or laminated CCL film (Copper Clad Laminate Film), and as shown in the photo shown in FIG. 6, the font 61 may etch the metal thin film G to sign, letters or numbers. The three-dimensional pattern 62 may be implemented to have a three-dimensional waveform (for example, concentric circles, mosaic patterns, etc.) by finely corroding the surface of the metal thin film (G).

When a font 61 drilled through the metal thin film G and a three-dimensional pattern 62 such as a three-dimensional waveform are provided together on the key sheet 60, the three-dimensional pattern 62 in which the light source provided through the font 61 becomes a three-dimensional waveform 62 is provided. ) And the scattering and refraction to be able to naturally express the dazzling aesthetic of light, and also to change the three-dimensional appearance according to the viewing angle of the key sheet 60 to produce a more elegant aesthetic and texture.

7 is a process chart showing a keypad manufacturing method for a portable terminal according to the present invention.

According to the present invention, a method for manufacturing a keypad for a mobile terminal including a key sheet 60 positioned on a pad 70 is provided with a font 61 and a three-dimensional pattern 62 together with the metal thin film G, and then the plating layer 63. And by providing the protective layer 64 to form the key sheet 60 and attaching the pad 70.

More specifically, the manufacturing process of the key sheet 60 is provided with a metal thin film (G) consisting of a metal disc or laminated CCL film (Copper Clad Laminate Film), as shown in Figure 7, the metal thin film (G) after the photoresist (PR; Photo Solder Resistor, Photo Solder Resistor, photosensitive insulating ink, photosensitive insulating film, etc.) is applied (S20), and irradiated with light while placing a font and a three-dimensional pattern-shaped mask (M) to be cured. (S30), the uncured photoresist (PR) is dissolved in a developing solution and developed into a font and a three-dimensional pattern (S40), and then the metal thin film (G) exposed to the font and the three-dimensional pattern is etched with a corrosion solution. Next (S50), the photoresist (PR) remaining on the upper metal thin film (G) is removed with a peeling solution (S60), to provide a plating layer 63 to give a gloss to the metal thin film (G) (S70) To provide a protective layer 64 to coat and protect the plating layer 63 (S80) The lure is.

At this time, the developing step (S40) according to the present invention was applied to the negative type (Negative Type) to remove the photosensitive resin (PR) of the portion not exposed to the light, but the photosensitive resin (PR) of the portion exposed to the light Of course, the positive type (Positive Type) that removes the developer may also be applied, and in the description of the present invention, the metal thin film (G) is initially given with the reference numeral G, but the photosensitive resin (PR) is coated and exposed. After developing, etching and peeling off, it is understood that the provision of the plating layer 63 and the protective layer 64 results in the completion of the key sheet 60 with the reference numeral 60.

In this way, when the photoresist PR is applied to the metal thin film G and the font 61 and the three-dimensional pattern 62 are applied together by exposing, developing, etching, and peeling the process, even if an excessive force is not applied, It can be advantageous in that the font 61 and the three-dimensional pattern 62 can be embodied delicately and precisely, and the gloss can be maintained luxuriously by the reinforcement of the plating layer 63, and the durability is greatly increased by the protective layer 64. You can strengthen it.

Thereafter, the keypad 100 can be completed by attaching the pad 70 having the protrusions 71 to the bottom of the key sheet 60 to which the font 61 and the three-dimensional pattern 62 are attached (S90). In addition, when the printing surface 80 corresponding to the font 61 is further included between the key sheet 60 and the pad 70, the color of the light by the lamp L may be changed more brilliantly and variously. .

In the keypad 100 for a mobile terminal according to the present invention having the configuration and process as described above, when the user presses the font 61, the protrusion 71 formed on the bottom surface of the pad 70 has an elastic force of the dome switch D. The signal is generated by overcoming the contact with the contact point H1 of the circuit board H, and the light source of the lamp L changes to various colors while passing through the printing surface 80 provided on the bottom surface of the key sheet 60. As a result of being exposed to the outside via the font 61 and cooperating with the three-dimensional pattern 62, the scattering and refraction may be repeated and variously express the beauty and three-dimensionality of the dazzling light.

Subsequently, when the signal is generated and the hand is released from the font 61, the font 61 of the key sheet 60 is returned to its original position by the elasticity of the dome switch D itself.

As described above, the keypad for a portable terminal and a method of manufacturing the same according to the present invention become a configuration of the keypad 100 and the key sheet 60 set on the pad 70 by the surface corrosion of the metal thin film G. The font 61 ) And the three-dimensional pattern 62 to be implemented together, and the light source provided through the font 61 cooperates with the three-dimensional pattern three-dimensional pattern 62 to repeat scattering and refraction to more beautifully express the dazzling aesthetics of light. At the same time there is an excellent effect that can be changed three-dimensionally according to the viewing angle of the key sheet 60 to produce a luxurious aesthetic and texture.

In addition, by providing the metal thin film (G), which is the original configuration of the key sheet 60, as a metal disc or laminated CCL film, it can enjoy the metal texture, and the photosensitive resin (PR) is applied to the metal thin film (G) and exposed, By developing, etching and peeling, not only the finer and more precise font 61 and the three-dimensional pattern 62 can be produced, but also the glossiness of the plating layer 63 and the durability by the protective layer 64 are useful.

In particular, when the photoresist (PR) is applied to the metal thin film (G) and the font 61 and the three-dimensional pattern 62 are applied together by exposing, developing, etching, and peeling, the font is delicate even without applying excessive force. (61) and the three-dimensional pattern 62 can be implemented can be preferred.

As can be seen from the above object, configuration, and effect of the present invention, the present invention provides the font 61 and the three-dimensional pattern 62 by the surface corrosion of the metal thin film G. Changeable processes and configurations may be understood as numbers of various cases, and the present invention includes all such numbers of changeable cases and the interpretation of the claims is also equivalent thereto.

Claims (4)

The keypad 100 for a mobile terminal, comprising a key sheet 60 positioned on the pad 70 and having a font 61 and a three-dimensional pattern 62 provided by surface corrosion of the metal thin film G. ). The method of claim 1, The metal thin film (G) is a keypad for a portable terminal, characterized in that the metal disk or laminated CCL film (Copper Clad Laminate Film). In the method for manufacturing a keypad for a mobile terminal comprising a key sheet 60 located on the pad 70, The key sheet 60 is Step S10 of preparing the metal thin film G, Step (S20) of applying a photosensitive resin (PR) to the metal thin film (G), Step S30 of irradiating light while placing the mask M on the photosensitive resin PR; Step (S40) of dissolving the uncured photoresist (PR) in a developer and developing in a font and three-dimensional pattern shape, Step (S50) of etching the metal thin film (G) exposed in the font and three-dimensional pattern with a corrosion solution, Step (S60) of removing the photosensitive resin (PR) remaining on the metal thin film (G) with a peeling solution, Step (S70) of providing a plating layer 63 for imparting gloss to the metal thin film G, And a step (S80) of providing a protective layer (64) to coat and protect the plating layer (63). The method of claim 3, wherein And a step (S90) of attaching the key sheet (60) to the pad (70) provided with a protrusion (71) to complete the keypad (100).

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