KR200428269Y1 - Keypad of Mobile Phone - Google Patents

Abstract

The present invention forms the organic EL layer for the backlight of the keypad by using silkscreen printing on the entire back side of the film flat sheet, and prints the fused paint on the back side by screen printing technique, and the liquid silicone and the film as a love through the vacuum thermoforming process. The present invention relates to an organic EL keypad of a wireless terminal capable of reducing productivity by reducing an assembly process by reducing an assembly process by manufacturing an integrated keypad by bonding a flat sheet. An organic EL keypad of a wireless terminal according to an embodiment of the present invention is formed on a film flat sheet made of a synthetic resin material, an uneven pattern layer on the front surface of the film flat sheet, and formed on the back surface of the film flat sheet and partially removed by etching. A silkscreen printing layer formed by silkscreen printing to display a plurality of keys for controlling the operation of a wireless terminal on the bottom surface of the film flat sheet from which the metal vacuum deposition layer is removed, and the metal vacuum deposition layer; Silkscreen printing is performed on the entire back surface of the film flat sheet including the screen printing layer as a protective coating layer formed by silkscreen printing, and on the entire surface of the backside of the film printing layer. Hack transparent layer formed by using, and keypad back formed by silkscreen printing on the entire back of the hack transparent layer It is composed of an organic EL layer for yeast, a one-sheet printing layer formed on the lower surface of the organic EL layer, and a boss region in which silicon is ejected and molded into the one-sheet printing layer and used as a driving medium for the plurality of keys and metal domes. It is characterized by.

Wireless terminal, keypad, organic EL, intaglio, urethane, silicone, uneven pattern, natural diamond

Description

Organic EL keypad of wireless terminal {Keypad of Mobile Phone}

1 is a perspective view showing a conventional wireless terminal.

2 is a cross-sectional view of the keypad used in the conventional wireless terminal.

3 is an exploded perspective view illustrating assembling a conventional keypad in a wireless terminal.

4 is a flowchart illustrating a method of manufacturing an organic EL keypad of a wireless terminal according to a first embodiment of the present invention.

5A to 5N are manufacturing process diagrams of the organic EL keypad of the wireless terminal according to the first embodiment of the present invention.

6 is a flowchart illustrating a method of manufacturing an organic EL keypad of a wireless terminal according to a second embodiment of the present invention.

7 is a view showing a part of the manufacturing process of the organic EL keypad of the wireless terminal according to a second embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: film flat sheet of synthetic resin

101: pattern layer of irregularities 102: hard coating layer

103: metal vacuum deposition layer 104, 105: silkscreen printing layer

160: film print layer

106: second insulating layer 107: haak transparent layer

108, 109: one-sheet printing layer (bond layer) 110: guide pin hole

111: cutting line groove 112: engraving processing area

120: urethane film 121: silicone

210: organic electroluminessence sheet

The present invention relates to an organic EL keypad of a wireless terminal, and more particularly, to form an organic EL layer for backlighting of a keypad by using silk screen printing on the entire back surface of a film flat sheet, and using a screen printing technique of fused paint on the back surface of the keypad. The present invention relates to an organic EL keypad of a wireless terminal capable of significantly reducing the assembly process and improving productivity by bonding liquid silicone as a love and a film flat sheet through a vacuum thermoforming process to manufacture an integrated keypad.

In general, a wireless terminal such as a cellular phone has a liquid crystal display 20 for displaying various information required for operation such as a transmission and reception state as shown in FIG. 1, and a keypad for performing signal generation and various functions. It consists of the key panel 10 which has the hole 1 in which the several key 31 of 30 is fitted.

The keypad 30 has a key 31 having a printed surface on which numbers or letters are printed, and the key 31 has a structure that protrudes outside the key panel 10 of the mobile telephone. The user checks the numbers or letters displayed on the printing surface and presses the desired key 31 to use the mobile phone. A light source consisting of a light emitting element is installed outside the bottom of the key 31 so that the printing surface can be checked at night. When the light is irradiated from the light source, the user can easily recognize the numbers or letters printed on the key 31 by the backlighting effect.

Figure 2 is a cross-sectional view of the keypad used in a conventional wireless terminal, Figure 3 is an exploded perspective view showing the assembly of a conventional keypad to a wireless terminal.

As shown in Figures 2 and 3, the conventional keypad 30 is a key formed of a base 35 formed with a projection 36 made of silicone rubber, and a key top 32 located on the base 35 made of synthetic resin. Consists of a button 31, the upper surface of the key top 32 is displayed numbers or letters, etc. and has a coated surface 33 coated and laser-etched and coated, the key top 32 is adhesive or double-sided tape 34 It is fixed to the base 35 using the back. The keypad 30 is assembled by inserting the keys 31 in each hole 1 formed in the same manner as the arrangement of the keys 31 in the key panel 10 of the cellular phone. Below the keypad 30 is a dome switch sheet 40 having a dome switch (metal dome) 41 formed under the pressure of the projection 36 formed on the base 35, and below the dome switch sheet 40. There is a printed circuit board (PCB) 50 having contacts 51. The key 31 and the dome switch 41 and the contacts are all formed keeping the same axis.

However, in the case of the conventional wireless terminal, a keypad having a plurality of keys may have a defect in that the coating film is peeled off because the painted and coated surfaces of the base 35 are formed on the front surface. It is injected by laser processing and UV coating, and the product thickness is increased by using a method of bonding with an injection key and a bond by thermoforming with silicon or applying an adhesive to an organic EL pad on the back of the injection key and urethane pad. Due to the multi-stage assembly process, there is a problem of lowering productivity and increasing defective rate causing manufacturing cost increase.

The present invention is to overcome the above-mentioned conventional problems, an object of the present invention is to form an organic EL layer for the backlight of the keypad using silk-screen printing on the entire film flat sheet back surface, while the fusion coating on the back It is to provide an organic EL keypad of a wireless terminal that can greatly reduce the assembly process and increase productivity by printing a screen by a screen printing technique and adhering the liquid silicone as a love and a film flat sheet through a vacuum thermoforming process. .

In order to achieve the above object, an organic EL keypad of a wireless terminal according to an embodiment of the present invention includes a film flat sheet made of synthetic resin, an uneven pattern layer on the front surface of the film flat sheet, and a back surface of the film flat sheet. Formed by silk-screen printing to display a metal vacuum deposition layer formed on the substrate, the metal vacuum deposition layer being partially removed by etching, and a plurality of keys controlling the operation of the wireless terminal on the bottom surface of the film flat sheet from which the metal vacuum deposition layer has been removed. A film coating layer as a protective coating layer formed by silkscreen printing on the entire back surface of the film flat sheet including the silk screen printing layer and the silk screen printing layer, and the entire surface of the film printing layer back surface. Silk screen on the Haak transparent layer formed by using silkscreen printing, and the entire back surface of the Haak transparent layer The organic EL layer for keypad backlight formed using the printing, the one mat printed layer formed on the lower surface of the organic EL layer, and the silicon are ejected and molded into the one mat printed layer, and the driving medium of the plurality of keys and the metal dome Characterized in that it consists of a boss area to be.

In order to achieve the above object, an organic EL keypad of a wireless terminal according to an embodiment of the present invention includes a film flat sheet made of synthetic resin, an uneven pattern layer on the front surface of the film flat sheet, and a back surface of the film flat sheet. A printed layer formed by silkscreen printing to display a plurality of keys for controlling the operation of the wireless terminal in its entirety, a film-printed printed layer as a protective coating layer formed by silkscreen printing on the entire bottom of the printed layer; The HAK transparent layer formed on the entire back surface of the film printing layer using silk screen printing, and the organic EL layer for keypad backlight formed on the entire back surface of the HAK transparent layer using a silk screen technique, and the organic EL layer A matte printed layer formed on a bottom surface of the mat, and the plurality of keys in which silicon is ejected and molded into the matted printed layer; Characterized in that it comprises a boss area to be the drive medium of the metal dome.

The organic EL layer may include a first electrode layer formed by ITO deposition on the back surface of the HACK transparent layer, a fluorescent layer for backlight formed on the back surface of the first electrode layer, and a back surface formed on the fluorescent layer to protect the fluorescent layer. And a second electrode layer formed on the rear surface of the dielectric layer to prevent leakage of residual current, and a protective layer formed on the back surface of the second electrode layer.

In addition, a silver print layer for insulation may be further formed between the first electrode layer and the backlight fluorescent layer where the plurality of keys are not formed.

In addition, it is preferable that an insulating layer is formed on the dielectric back surface.

It is also preferred that the plurality of key tops are concave engraved using a natural diamond bite.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

4 is a flowchart illustrating a method of manufacturing an organic EL keypad of a wireless terminal according to a first embodiment of the present invention, and FIGS. 5A to 5N are flowcharts of a process of manufacturing an organic EL keypad of a wireless terminal according to a first embodiment of the present invention. As will be described together for convenience.

As shown, the method of manufacturing the organic EL keypad of the wireless terminal according to the first embodiment of the present invention is a step of forming an uneven pattern (S100), hard coating step (S110), deposition step (S120), film removal and Film degree printing step (S130), haak transparent printing step (S140), organic EL layer forming step (S150), CNC machining step (S160), sawing step (S170), Hanmat printing step (S180) and , Urethane film printing step (S190), silicon discharging step (S200), thermoforming and forming step (S210), the test and product shipment step (S220).

In the concave-convex pattern forming step (S100), as shown in FIG. 5A, a film flat sheet made of a synthetic resin material such as polycarbonate (PC), polyethylene terephthalate, polymethyl methacrylate (PMMA), or the like ( The pattern layer 101 having an uneven shape is formed on the front surface of the substrate 100 in order to enhance the metallic texture. As the method of forming the uneven pattern layer 101, a conventional machining technique, an offset printing technique, a mold molding technique, or the like may be used. The above-described machining technique is a technique of forming an unevenness by passing the entire surface of the film flat sheet 100 made of a synthetic resin material through a sandpaper having a circular shape of a rotating drum. In addition, the offset printing technique is a technique for forming a pattern by using a corrosion technique in a sus circular cylinder and at the same time by applying a predetermined amount of ink, the mold forming technique is a film flat sheet sheet 100 of a synthetic resin material It is a technique of forming an uneven pattern by applying a heat and pressure to a mold having an uneven pattern to be implemented after applying a thin UV-based transparent paint onto the mold. However, the present invention is not limited to the above-described technique for the formation of the uneven pattern layer 101 can be formed by a variety of techniques, of course.

In the hard coating step (S110), as shown in Figure 5b, by forming a hard coating layer 102 by the conventional UV coating on the front surface of the pattern layer 101 of the concave-convex form (air) spray the UV paint in the X and Y-axis directions using a gun) to coat. Here, the hard coating step may also be performed after the CNC machining step (S160) to be described later.

In the deposition step (S120), as shown in FIG. 5C, a metal vacuum deposition layer (Vacuum) is deposited by vacuum depositing a metal such as nickel, aluminum, or chromium on a back surface of the film flat sheet 100 made of a synthetic resin material. 103).

In the above-described film removal and film printing step (S130), as shown in FIGS. 5D to 5F, the silkscreen printing layer 104 is subjected to normal silkscreen printing on the portion where the deposition layer 103 is left by silkscreen printing. ), The deposition layer 103 is etched and removed using the silkscreen printing layer 104 as a mask, and then the screen printing layer 105 is formed on the rear center portion and the two screen printing layers 104 are formed. The film-form printing layer 106 as a protective coating layer is formed in the whole back surface of the film flat sheet sheet 100 of the synthetic resin material containing the (105) by the conventional silkscreen printing method.

In the Haak transparent printing step (S140), as shown in Figure 5g, the film printing layer 106 to improve the adhesion between the film printing layer 106 and the one mat (bond layer) 108 to be described later. A hack transparent layer 107 is formed on the entire surface of the rear surface by applying a hack transparent paint using a silk screen technique. In this way, the film flat sheet 100 made of a synthetic resin material, in which a plurality of keypads 30 in which final numbers, letters, or colors are printed, is completed.

In the organic EL layer forming step (S150), as shown in FIG. 5H, the organic EL layer 210 for backlighting of the keypad is formed on the entire back surface of the HACK transparent layer 107 by using silkscreen printing.

In more detail, the organic EL layer 210 may include a first electrode layer 211 formed by conventional ITO deposition (electrolytic deposition) on the entire back surface of the HAC, and a rear surface of the first electrode layer 211. Backlit fluorescent layer 212 printed with a mixture of various paints to be supplied with power to emit light and a dielectric layer 213 formed on the rear surface of the fluorescent layer 212 to protect the fluorescent layer 212 And a second electrode layer 214 formed on the rear surface of the dielectric layer 213 to prevent leakage of residual current, and a protective layer 215 formed on the rear surface of the second electrode layer.

Here, the first electrode layer 211 as the transparent conductive layer is usually made of ITO powder and a binder, or a thin film layer of ITO is formed using a sputtering method, made of a conductive organic polymer, or a conductive organic polymer and ITO. It may be made of a material mixed with. As the conductive organic polymer, materials such as 3,4-ethylenedioxythiophene (PEDOT: PSS) and polyethylenethioxythiophene (PEDOT: PSS) may be used. At this time, it is possible to provide an organic EL having greater luminance by performing ITO deposition such that the electrical resistance is 100 ohms or more.

In addition, since the light emission by the backlight is not required between the first electrode layer 211 and the backlight fluorescent layer 212, the key portion of the keypad is not formed.

The phosphor layer 212 is usually made of phosphor powder and a binder. The phosphor powder uses a group II-IV compound like ZnS. The binder used for the fluorescent layer 212 preferably has a higher dielectric constant than the phosphor powder. As the binder of the high dielectric constant, cyanoethyl pullulan or fluororesin may be used. When the fluorescent layer 212 is instantaneously heated with heat of 100 to 150 ° C., the phosphor powder may be more closely arranged to obtain an effect of increasing uniformity of light emission.

The dielectric layer 213 is usually made of a dielectric powder and a binder. As the dielectric powder, a dielectric powder having a high dielectric constant such as BaTiO ₃ is used. The size of the dielectric powder is preferably smaller than about 0.8 μm, but the present invention does not limit the size thereof. In addition, it is preferable to use a polymer having a high dielectric constant such as cyanoethyl pullulan or fluororesin as the binder used in the dielectric layer 213. In addition, the dielectric layer 213 generally needs to be heat treated at a temperature of 80 to 170 캜. Through heat treatment, the dielectric powder is more closely rearranged, the density of the dielectric powder of the dielectric layer 213 is increased, and the dielectric constant of the dielectric layer 213 is improved.

In this case, the insulating layer (not shown) is printed on the rear surface of the dielectric layer 213 together with the dielectric layer printing so as to protect the external portion through which the AC current flows, thereby further enhancing the protection of the fluorescent layer 212 due to the insulation. It is supposed to be. As the material of the insulating layer, a material having a high dielectric constant, such as cyanoethyl pullulan or fluororesin, is preferably used, but the material is not limited in the present invention.

The second electrode layer 214 is to prevent surface corrosion or leakage of residual current, and may be made of a mixture of conductive powder and binder, a conductive organic polymer, or a mixture of conductive powder and conductive organic polymer. As the conductive powder, for example, silver, copper powder coated with silver, carbon powder, or the like is preferably used, but the conductive material is not limited to the material in the present invention. As the conductive organic polymer, for example, a material such as 3,4-ethylenedioxythiophene (PEDOT: PSS), polyethylenethioxythiophene (PEDOT: PSS) or the like can be used.

Finally, the protective layer 215 increases the thickness as a protective layer by performing silver printing on the back surface of the second electrode layer 214 and at the same time, prints the cushion layer as surface protection of the organic EL layer 210 on the back surface. It is supposed to print the final finish.

In the above computer numerical control (CNC) machining step (S160), as shown in FIG. 5I, the working standard in the post-process is applied to the site of formation of the individual keypad 30 by using the natural diamond bit 200. In order to easily press-cut the guide pin hole 110 and the final finished key pad 30 in a press working process to be described later, along the outer line of the keypad 30 on the front surface of the film flat sheet 100 made of synthetic resin. The cutting is performed to form the cutting line groove 111. The cutting line groove 111 is preferably processed by grinding the raw material thickness from 0.4T to approximately 0.2T using a natural diamond 200, but in the present invention is not limited to the processing thickness.

On the other hand, the natural diamond bite 200 is excellent in strength compared to the cemented carbide bite or artificial diamond bite (PCD) bite used in the conventional CNC machining, the cutting edge is sharp but not worn, the processing area is smoother. As a result, when pressing and cutting the cutting line groove 111 formed on the outer line of the keypad 30, the same injection feeling as that of the injection is displayed, and the process of manufacturing the keypad by injection is improved and shortened. Can be reduced.

In addition, in the CNC machining step (S160), the intaglio processing region 112 may be formed to concave the key portion of the front surface of the film flat sheet 100 made of synthetic resin using the natural diamond bit 200. In this case, when the light is irradiated to the intaglio processing area 112, the light is reflected in one place, thereby causing an optical illusion in which the intaglio processing area 112 is embossed, and the keypad is more beautiful.

In the sawing step S170, as illustrated in FIG. 5J, a keypad having a unit unit of a substantially rectangular shape having a plurality of keypads 30 and four guide holes 110 printed with numbers, letters, or colors formed therein. After processing into parts (not numbered drawings), each of the keypad part seating parts (not numbered numbers) of the other flat vinyl 300 is printed through guide pins (not numbered numbers) and guide holes 110, respectively. Seat the keypad. At this time, each of the keypad portion of the square shape is seated by turning the organic EL layer 210 of the film flat sheet 100 of the synthetic resin to the front to the opposite side, and the upper surface of the keypad portion mounting portion is made of an adhesive surface easily square keypad The attachment can be attached.

In the above-described Han mat (bond layer) printing step (S170), as shown in Figure 5k, the same type of one mat paint (fusion coating) on the upper surface of the organic EL layer 211 is printed twice First and second single mat printed layers 108 and 109 are formed. That is, after printing the one matte paint to form the first one matte print layer 108 and dried in an oven at a temperature of 75 degrees for about 30 minutes, the same one matte paint is printed again to form a second one matte print layer ( 109). In this manner, by repeatedly printing twice, the thickness of the adhesive layer is increased, and thus the adhesive force at the time of the integral bonding with the silicone and the urethane film as a rubber to be described later can be further improved.

Subsequently, during the silicone molding, which will be described later on the back surface, that is, the printing surface, of the film flat sheet 100 made of synthetic resin, the molding temperature rises to about 150 degrees, and the molding mold (metal material) protects the scratches from occurring on the front of the product. In order to be attached to the protective vinyl (not shown in the drawing number) on the front in accordance with the keypad in order to be put into the molding process to be described later.

In the urethane film printing step (S190), as shown in Figure 5l, after printing the desired design and color on the back of the urethane film 120 to form a printed layer (120-1), a film of synthetic resin material The urethane film 120 is affixed on the back surface of the flat sheet 100, that is, on the second single mat printed layer 109 by ordinary press working.

In the silicon discharging step S200, as illustrated in FIG. 5M, a predetermined amount of silicon (generally about 8 g to 12 g) 121 is discharged onto the urethane film 120 as shown in FIG. 5M. Here, the molding may be performed by discharging silicon directly to the back surface of the film flat sheet 100 made of synthetic resin without attaching the urethane film 120.

In the thermoforming and forming step, as illustrated in FIG. 5N, the keypad portion in which the silicon 121 is discharged based on the guide pin hole 110 is seated on the lower plate of the conventional thermoforming mold. At this time, the surface of the hard coating layer 101 of the keypad portion is faced to the bottom and seated so that the printed layer is visible to the front. After that, the urethane film 120 having the silicon discharged on the upper surface of the film flat sheet 100 made of synthetic resin is seated on the guide pin hole basis and then molded. Here, the boss (not shown in the drawing number) which becomes the driving medium of the keypad and the metal dome of the wireless terminal is integrally formed by the mold.

On the other hand, as shown in Figure 5n, in the case of a flat specification, the film flat sheet 100 of the silicon 121 and the synthetic resin material is formed directly, but the non-planar specification, that is, the embossing forming specification is a weak foaming Molding is performed through the process of primary forming, secondary forming and forming. In this case, forming refers to a process of deforming the shape by applying heat and pressure to a desired shape in the case of a shape having a 3D shape rather than a flat specification, after forming in a weakly desired shape in the first forming. In the second molding process, the final forming is performed. Here, in the secondary forming molding process, the mold is designed in a desired shape on the mold, and is molded according to the mold shape. As described above, the fused paint is printed by the screen printing method on the back of the film flat sheet 100 having the organic EL layer printed by the silk screen method, and the liquid silicon 122 and the film flat sheet 100 as a love are subjected to a vacuum thermoforming process. By manufacturing the integrated keypad by adhering), it is possible to greatly reduce the unnecessary assembly process as in the prior art.

As such, the cutting line grooves formed along the outer line of the keypad 30 are seated in the press mold (not shown) based on the guide pin holes 110 formed at the outer side of each keypad unit in which the forming process and the molding process are completed. The outer end of the (111) by pressing the final product is completed the keypad 30.

In the above test and product release step (S220), to prevent the final test of the keypad 30, which is the final product, the scratch-resistant protective vinyl is scraped off, and after performing a bad test, the scratch-resistant protective vinyl is attached again and the keypad is finished to be shipped. do.

6 is a flowchart illustrating a method of manufacturing an organic EL keypad of a wireless terminal according to a second embodiment of the present invention, and FIG. 7 illustrates a part of the manufacturing process of the organic EL keypad of a wireless terminal according to a second embodiment of the present invention. As shown, it demonstrates together for convenience.

As shown, the manufacturing method of the organic EL keypad of the wireless terminal according to the second embodiment of the present invention is a concave-convex pattern forming step (S300), hard coating step (S310), silkscreen printing step (S320), Film degree printing step (S330), hake transparent printing step (S340), organic EL layer forming step (S350), CNC machining step (S360), sawing step (S370), Hanmat printing step (S380) and , Urethane film printing step (S390), silicon discharging step (S400), thermoforming and forming step (S410), the test and product shipping step (S420). That is, the manufacturing method of the organic EL keypad of the wireless terminal according to the second embodiment of the present invention is a deposition step (S120), silkscreen printing and transparent printing of the manufacturing method of the keypad of the wireless terminal according to the first embodiment of the present invention Instead of performing the step S130 and the film removal and film printing step S140, except for performing the silkscreen printing step S320 and the film printing step S330, only the differences will be described.

That is, as shown in Figure 7, in the silkscreen printing step (S320) after the hard coating step (S310), the normal silkscreen printing on the entire back surface of the film flat sheet 400 of the synthetic resin material The first, second and third silkscreen printed layers 403, 404 and 405, which represent numbers, letters or colors for displaying keys, are sequentially formed. Here, the illustrated example shows three silkscreen prints in the case where the key portion requires three colors or numbers (letters), but silkscreen prints are as many as the number of colors or number designs required. Layers can be formed, and the present invention does not limit the number of silkscreen printed layers.

In the above-described film printing step (S330), the film printing layer 406 as a protective coating layer is formed on the entire back surface of the third silkscreen printing layer 405 by a conventional silkscreen printing method.

Since the process after the film printing step (S330) is the same as the manufacturing process of the keypad of the wireless terminal according to the first embodiment of the present invention, further description thereof will be omitted.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art can be variously modified and changed without departing from the spirit and scope of the present invention described in the claims below You will understand.

As described above, according to the organic EL keypad of the wireless terminal according to the present invention, an organic EL layer for backlighting of the keypad is formed on the entire back surface of the film flat sheet by using silk screen printing, and a fusion paint is screened on the back surface. Printing by printing technique and vacuum thermoforming process to bond the liquid silicone and film flat sheet as a love to manufacture an integral keypad has the effect of significantly reducing the assembly process to improve productivity.

By forming a pattern layer having a concave-convex shape on the front surface of the film flat sheet made of synthetic resin, which is a base of the keypad, there is an effect of providing a metallic texture to the user when using the keypad.

In addition, by using a natural diamond in the CNC machining step of the keypad manufacturing process, the injection feeling can be realized without ejecting the keypad, and the process can be improved and shortened, thereby reducing the defective rate, thereby reducing the manufacturing cost. There is.

In addition, when the light is irradiated to the intaglio processing area when the actual keypad is used by performing the intaglio processing area by concave the key portion of the front surface of the film plate of synthetic resin in the natural diamond bit during the CNC machining step of the keypad manufacturing process. By reflecting the light in one place, there is an effect that an optical illusion in which the engraved region is embossed appears.

In addition, by integrating the forming process and the molding process of the keypad manufacturing process, there is no need to join the injection key and the rubber with double-sided tape or bond as in the prior art, thereby improving and shortening the process.

Claims (6)

A film flat sheet made of synthetic resin, A pattern layer of irregularities on the entire surface of the film flat sheet; A metal vacuum deposition layer formed on a rear surface of the film flat sheet and partially removed by etching; A silkscreen printing layer formed by silkscreen printing to display a plurality of keys for controlling the operation of a wireless terminal on the bottom surface of the film flat sheet from which the metal vacuum deposition layer is removed; A film printing layer as a protective coating layer formed by silkscreen printing on the entire rear surface of the film flat sheet including the silkscreen printing layer, Hac transparent layer formed on the entire back surface of the film printing layer by using the Haq transparent paint silkscreen printing, An organic EL layer for keypad backlight formed on the entire back surface of the hack transparent layer using silk screen printing; Han mat printing layer formed on the lower surface of the organic EL layer, The organic EL keypad of the wireless terminal, wherein the silicon is ejected and molded into the one mat printed layer, and a boss area is used as a driving medium for the plurality of keys and the metal dome. A film flat sheet made of synthetic resin, A pattern layer of irregularities on the entire surface of the film flat sheet; A print layer formed by silkscreen printing to display a plurality of keys for controlling the operation of the wireless terminal on the entire back surface of the film flat sheet; A film printing layer as a protective coating layer formed by silkscreen printing on the entire bottom of the printing layer; Hac transparent layer formed on the entire back surface of the film printing layer by using the Haq transparent paint silkscreen printing, An organic EL layer for keypad backlight formed on the entire back surface of the hack transparent layer using a silk screen technique; Han mat printing layer formed on the lower surface of the organic EL layer, The organic EL keypad of the wireless terminal, characterized in that the plurality of keys in which the silicon is ejected and molded into the one mat printed layer and a boss area serving as a driving medium of the metal dome. The method according to claim 1 or 2, The organic EL layer, A first electrode layer formed by ITO deposition on the back of the haak transparent layer, A fluorescent layer for backlight formed on the back of the first electrode layer, A dielectric layer formed on the rear surface of the fluorescent layer to protect the fluorescent layer; A second electrode layer formed on a rear surface of the dielectric layer to prevent leakage of residual current; An organic EL keypad of a wireless terminal, characterized in that consisting of a protective layer formed on the back of the second electrode layer. The method of claim 3, wherein An organic EL keypad of a wireless terminal, characterized in that a silver printing layer for insulation is further formed between the first electrode layer and the fluorescent layer for backlight is not formed. The method of claim 3, wherein The organic EL keypad of the wireless terminal, characterized in that an insulating layer is formed on the back of the dielectric. The method according to claim 1 or 2, Keypad of a wireless terminal, characterized in that the concave intaglio process of the upper portion of the plurality of keys using a natural diamond.

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