KR101079190B1 - Touchscreen panel having zigzag pattern design - Google Patents

Abstract

The present invention makes the inner end of the silver pattern electrode equal to the width of the double-sided adhesive tape, and forms an etching (etching) on the lower ITO film layer to react with components such as chlorine contained in the double-sided adhesive tape layer. Zigzag pattern (i.e., zigzag pattern) to prevent the adhesion of the upper and lower ITO film layers, such as hydrochloric acid or the like, from being deteriorated due to corrosion or peeling from the ITO film layer coating layer due to double-sided adhesive tape. The present invention relates to a touch screen panel having a zigzag pattern structure, wherein an electrical signal is smoothly connected between the upper and lower ITO film layers, thereby allowing a visible area of the touch screen panel (View Area, V / A). By improving the quality of the image without changing the optical characteristics, the application can be extended to various kinds of electronic devices. Demand is expected to expand further.

Touch screen panel, double-sided adhesive tape, etching, chlorine, ITO film layer, silver pattern electrode

Description

Touch screen panel with zigzag pattern structure {TOUCHSCREEN PANEL HAVING ZIGZAG PATTERN DESIGN}

The present invention relates to a touch screen panel having a zigzag pattern structure. More specifically, the inner end of the upper silver pattern electrode is made the same as the double-sided adhesive tape, and an etching is formed on the lower ITO film layer to form a double-sided adhesive tape. A zigzag pattern is applied to prevent damage caused by the reaction of the upper and lower ITO film layers, for example, by hydrochloric acid, which is a compound produced by reacting with a component such as chlorine contained in the layer. The present invention relates to a touch screen panel having a zigzag pattern structure, which is characterized in that the electrical signal is smoothly formed between the upper and lower ITO film layers.

Touch Screen Panel, an industry that is rapidly growing recently, is a new input method that can replace the input method such as a mouse or keyboard, and the user directly touches the desired information on the screen by using his / her fingers while looking at the screen. It is a new input method that can be input. Therefore, it is evaluated as the most ideal input method under the GUI (Graphical User Interface) environment because it can be easily operated by anyone, and is currently used as a mobile phone, navigation, PMP, bank teller and dispenser, public information issuing machine, guide of various tourism and major institutions. It is widely used in various fields such as equipment.

The touchscreen panel market has grown rapidly in size as Apple's iPhone began to adopt capacitive touchscreen panels in mobile phones. Especially since early this year, more mobile phone companies have applied touchscreen panels. As various new mobile phones are provided to consumers, various touch screen panels have been developed and patented and registered.

In addition, the electronic products and devices to which the touch screen panel is applied are expensive products, and in order to satisfy consumer's needs, the device should have excellent performance and no defects in appearance. In other words, expensive electronic products and devices may suffer huge losses due to minor defects from customers due to minor defects in appearance.

On the other hand, when looking at the structure of a typical mobile phone as an electronic product to which the touch screen panel is applied, the touch screen panel 100 in the conventional mobile phone has a structure as shown in Figure 1, the conventional touch screen panel As shown in FIG. 2, the laminated structure of the optical structure includes an upper OCA layer 10 (Optically Clear Adhesive Layer, hereinafter referred to as an 'OCA layer'), an upper ITO film layer 20 (PET layer and ITO layer), Indium Tin Oxide Film Layer, hereinafter referred to as "ITO Film Layer", upper silver pattern electrode 30, double-sided adhesive tape layer 40, lower silver pattern electrode 50, lower ITO film layer (PET layer and ITO layer) (60), the lower OCA layer 70 and the plastic PC or tempered glass reinforcement plate 80 is laminated, the width of the upper silver pattern electrode 30 and the lower silver pattern electrode 50 is the same , A double-sided adhesive tape layer 40 stacked between the upper silver pattern electrode 30 and the lower silver pattern electrode 50. ) Has a wide structure.

In addition, in the touch screen panel having the above structure, the ITO film layer is a thin film layer coated with indium tin oxide (Indium Tin Oxide) on the PET film, and when the external pressure is applied on the touch screen, the upper and lower ITO film layers 20 , 60) is a layer that serves to connect with each other as an electrical signal.

As such, the conventional touch screen panel 100 has a structure as shown in FIG. 1, such as a and b portions formed between the double-sided adhesive tape layer 40 and the upper and lower ITO film layers 20 and 60, respectively. When the double-sided adhesive tape layer 40 is directly in contact with the upper and lower ITO film layers 20 and 60 by the space, it may be generated by reacting with the components included in the double-sided adhesive tape itself in a humid environment. Chemicals react with the ITO film layer to corrode the ITO film layer or reduce the adhesion between the ITO layer and the PET film, resulting in deterioration of the electrical properties of the product as the resistance value of the part increases, or the ITO film layer If damaged, the silver pattern electrode may not function properly and may affect the overall performance of the touch screen panel, causing problems.

As described above, in the conventional touch screen panel, the double-sided adhesive tape is directly in contact with the upper and lower ITO film layers, and the components that can be generated by reacting with the components (for example, chlorine or the like) contained in the double-sided adhesive tape itself are included. Problems that cause the loss of expensive electronic products by the corrosion of the ITO film layer has been generated, but techniques for improving the situation have not been properly developed yet.

Accordingly, the present invention extends such that the inner end of the upper silver pattern electrode is stacked at the same end as the inside of the double-sided adhesive tape (DAT) layer toward the visible area (V / A, View Area). By design, the double-sided adhesive tape is not in direct contact with the upper ITO film layer, thereby preventing damage to the upper ITO film layer from various materials contained in the double-sided adhesive tape, so that electrical signals between the upper and lower ITO film layers can be smoothly connected. An object of the present invention is to provide a touch screen panel having a zigzag pattern structure, which is characterized in that it has a structure such that the structure can be made.

In addition, the present invention by forming an etching line on the lower ITO film layer by scraping the ITO layer and forming an etching in a direction orthogonal to the width of the lower ITO film layer to expose the polyethylene terephthalate (PET) film layer Even though the double-sided adhesive tape is in contact with the lower ITO film layer, the electrical and physical damages received from the lower ITO film layer exposed by etching may cause corrosion of the lower ITO film layer due to the insulation effect of the polyethylene terephthalate (PET) film layer. Another object of the present invention is to provide a touch screen panel having a zigzag pattern structure, which is a structure in which electrical signals between upper and lower ITO film layers can be smoothly connected by preventing electrical and physical damage from spreading.

As described above, the method of forming the silver pattern electrode of the upper ITO film layer as 1: 1 with the inner end of the double-sided adhesive tape and forming etching into the lower silver pattern electrode in the opposite direction, that is, of the lower ITO film layer It is also possible to form a silver pattern electrode with a 1: 1 on both sides of the double-sided adhesive tape and the inner end, and to form an etching from the upper ITO film layer into the silver pattern electrode.

The present invention for achieving the above object is the upper OCA layer, the upper ITO film layer, the upper silver pattern electrode, double-sided adhesive tape layer, lower silver pattern electrode, lower ITO film layer, lower OCA layer and plastic PC or tempered glass reinforcement plate In the touch screen panel consisting of a stacked structure in order of,

The upper silver pattern electrode has a structure in which the width of the double-sided adhesive tape layer does not touch the upper ITO film layer by stacking the width of the double-sided adhesive tape in the same length as the width of the double-sided adhesive tape layer toward the view area. A touch screen panel having a zigzag pattern structure is characterized in that the problem solving means.

In addition, the present invention is a touch screen panel having a zigzag pattern structure is made of a stacked structure of the upper OCA layer, the upper ITO film layer, the upper silver pattern electrode, the double-sided adhesive tape layer, the lower silver pattern electrode and the ITO PC or ITO glass plate. In the touch screen panel,

The upper silver pattern electrode has a structure in which the width of the double-sided adhesive tape layer does not touch the upper ITO film layer by stacking the width of the double-sided adhesive tape in the same length as the width of the double-sided adhesive tape layer toward the view area. A touch screen panel having a zigzag pattern structure is set as another means for solving the problems.

And in the present invention, the lower ITO film layer or ITO PC or ITO glass plate is characterized in that to form an etching (etching),

In addition, the etching portion is preferably formed in a direction orthogonal to the width of the lower ITO film layer or the ITO PC or ITO glass plate.

Accordingly, the touch screen panel having a zigzag pattern structure according to the present invention prevents the upper and lower ITO film layers by the double-sided adhesive tape from being damaged by the components contained in the double-sided adhesive tape, thereby preventing the electrical contact between the upper and lower ITO film layers. By allowing the signals to be connected smoothly, the quality of the images can be improved without changing the optical characteristics in the view area (V / A) of the touch screen panel. The demand is expected to expand further.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention will be described in detail with reference to Figures 3 to 7, which are attached, with the same reference numerals for components that perform the same function. On the other hand, in the drawings and detailed description showing and referring to the configuration and operation that can be easily understood by those skilled in the art from a general touch screen panel is briefly or omitted. In particular, although the size ratio between the elements in the drawings of the drawings are expressed slightly different or the size between the components that are coupled to each other is expressed, the representation of such drawings is easily understood by those skilled in the art The descriptions are omitted since they are possible parts.

In addition, the present invention should be understood that the term 'ITO film layer' and 'adhesive tape layer' among the terms used in the description may be used interchangeably as 'ITO film' and 'adhesive tape' in the context flow before and after the sentence. .

In the present invention, Figure 3 is a cross-sectional view showing a surface (base: lower ITO film layer) cut in the A-A 'line direction of the touch screen panel having a zigzag pattern structure as an embodiment according to the present invention, Figure 4 As another embodiment according to the present invention, a cross-sectional view showing a surface (base surface: ITO PC or ITO glass) cut in the A-A 'line direction of the touch screen panel having a zigzag pattern structure, Figure 5 and Figure 3 and Figure 4 is a plan view illustrating the formation of an etching unit in FIG. 4, and FIG. 6 is a cross-sectional view illustrating the state in which an etching unit is formed in FIG. 3, and FIG. 7 illustrates a state in which the etching unit is formed in FIG. 4. Relates to the cross-sectional view shown.

As shown in FIG. 3, the touch screen panel having a zigzag pattern structure according to the present invention has an upper OCA layer 10, an upper ITO film layer 20, an upper silver patternon electrode 30, and a window film layer (not shown in the drawing). Top panel of the laminated structure in the order of) and the lower silver pattern electrode 50, the lower ITO film layer 60, the lower OCA layer 70 and the plastic PC or tempered glass reinforcement plate 80 It is divided into a lower panel of the structure, and the lower panel and the upper panel consists of a structure bonded to each other using a double-sided adhesive tape (40).

In addition, the stacked structure of the touch screen panel having a zigzag pattern structure according to the present invention is an upper OCA layer 10 (Optically Clear Adhesive Layer, hereinafter referred to as 'OCA layer'), the upper ITO film layer as shown in FIG. 20), the upper silver pattern electrode 30, the double-sided adhesive tape layer 40, the lower silver pattern electrode 50, ITO PC or ITO glass plate 81 (in the above structure, the ITO film layer and the OCA layer and It can also be applied to a laminated structure of a plastic PC or a tempered glass reinforcement plate to realize a role of one layer).

The laminated structure of the touch screen panel having a zigzag pattern structure according to the present invention can be applied to both conventional 4-wire resistive touch screen panels. That is, two electrodes are formed of silver (or a conductive material capable of acting as an electrode) on the upper and lower sides, irrespective of the stacked structure, and an ITO layer (or a material capable of acting as such, for example, CNT, on the upper and lower sides). It can be applied to all types of touch screen panel products including silver nano wire.

In the above, the upper and lower OCA layer (10, 70) is the upper and lower ITO film layer (20, 60) and the plastic PC or tempered glass reinforcement plate 80 and using the optically clear adhesive OCA (Optically Clear Adhesive), respectively It is a layer for adhering a window film layer (the layer laminated | stacked on top of the upper OCA layer not shown in drawing).

In addition, the ITO film layer is a layer coated with indium tin oxide (Indium Tin Oxide) on the film, and when the external pressure is applied on the touch screen, the upper and lower ITO film layers 20 and 60 come into contact with each other and connect with electric signals. Do it.

In the present invention, the flexible circuit board (not shown in the drawing) is an anisotropic conductive film (ACF) bonded to the upper and lower ends of the flexible circuit board of the portion connected to the upper and lower silver pattern electrodes (30, 50) The conductive balls contained in (not shown in the drawing) are blown by pressure, and current flows between the flexible circuit board and the upper and lower silver pattern electrodes 30 and 50. The above configuration is a conventional technique. Since it is not a feature of the present invention, description thereof will be omitted.

Therefore, as an embodiment according to the present invention, the touch screen panel having a zigzag pattern structure as shown in Figure 3 is the upper OCA layer 10, the upper ITO film layer 20, the upper silver patternon electrode 30, both sides adhesive In the touch screen panel having a structure in which a tape layer 40, a lower silver pattern electrode 50, a lower ITO film 60, a lower OCA layer 70, and a plastic PC or tempered glass reinforcement plate 80 are stacked in this order. In

The upper silver pattern electrode 30 has a width of the double-sided adhesive tape layer 40 on the upper side so that the length of the width is laminated with a width equal to the length of the width of the double-sided adhesive tape layer 40 toward the view area. It is characterized by having a structure not to contact the ITO film layer 20.

And as another embodiment according to the present invention, the touch screen panel having a zigzag pattern structure as shown in Figure 4 is the upper OCA layer 10, the upper ITO film layer 20, the upper silver patternon electrode 30, both sides In the touch screen panel having a structure in which the adhesive tape layer 40, the lower silver pattern electrode 50, and the ITO PC or ITO glass plate 81 are stacked in this order,

The upper silver pattern electrode 30 has a width of the double-sided adhesive tape layer 40 on the upper side so that the length of the width is laminated with a width equal to the length of the width of the double-sided adhesive tape layer 40 toward the view area. It is characterized by having a structure not to contact the ITO film layer 20.

In the present invention, the zigzag pattern structure is different from the conventional touch screen panel in which the stacked structure of the optical structure is a symmetrical stacked structure as shown in FIG. 2, and the stacked structure of the optical structure is shown in FIGS. 3 and 4. The silver pattern electrode means an asymmetrical laminated structure.

That is, in the touch screen panel according to the present invention, the width of the upper silver pattern electrode 30 is equal to the length of the width of the double-sided adhesive tape layer 40 toward the view area (V / A, View Area). By the expansion design to be laminated, the upper ITO film layer by the compound or the like that can be produced by reacting with the components contained in the double-sided adhesive tape without the direct double-sided adhesive tape layer 40 is in direct contact with the upper ITO film layer 20 ( It is characterized in that the structure to prevent the damage of the 20) so that the electrical signal between the upper and lower ITO film layer (20, 60) can be connected smoothly.

In the embodiment according to the present invention, the lower ITO film layer 60 forms an etching portion 63 as shown in FIG. 3, and is also shown in FIG. 4 in another embodiment according to the present invention. As described above, it is preferable to form an etching portion 63 on the ITO PC or the ITO glass plate 81.

As shown in FIG. 5, the etching part 63 is etched from the lower ITO film layer 60 to scrape off the surface of the ITO layer 61 and then expose the PET film layer 62. By forming an etching line in a direction orthogonal to the width of the lower ITO film layer 60 (orthogonal to A-A 'of FIG. 1), the double-sided adhesive tape layer 40 is formed by the lower ITO film layer ( 6, the indium tin oxide layer 61 is scraped off by the etching portion 63 as shown in FIG. 6, and the insulation effect of the exposed PET film layer 62 is reduced. It is characterized in that the structure to prevent the damage caused by corrosion of the lower ITO film layer 60 is spread so that the electrical signal between the upper and lower ITO film layer (20, 60) can be connected smoothly.

Alternatively, as shown in FIG. 5, etching is performed in the direction orthogonal to the width of the ITO PC or the ITO glass plate 81 in the ITO PC or the ITO glass plate 81 (orthogonal to A-A 'in FIG. 1). ) And cut off the surface of the ITO PC or ITO glass plate 81 as shown in FIG.

In addition, the etching portion 63 may be formed by a wet etching method or a dry etching method. Wet etching (Wet Etching) method and dry etching (Dry) method is performed by a conventional method.

In addition, as shown in FIGS. 3 and 4, the etching portion formed by the above method may be etched in a width of a predetermined interval or in the form of a thin line.

For reference, in the present invention, the thickness of the stack of optical structures used in the touch screen panel is typically a stack of optical structures used in a general touch screen panel, and the thicknesses of the upper and lower silver pattern electrodes 30 and 50 are respectively. It is preferable that it is 20 micrometers or less, The thickness of the double-sided adhesive tape layer 40 is 50-150 micrometers, The thickness of the upper and lower ITO film layers 20 and 60 uses between 100-200 micrometers, In addition, the thickness of the ITO layer 61 in the upper and lower ITO film layers 20 and 60 is preferably several hundred nm, and may be applied in addition to the above-defined thickness according to the purpose of use.

Meanwhile, in the conventional touch screen panel, as shown in FIG. 2, the upper and lower silver pattern electrodes 30 and 50 are disposed between the upper silver pattern electrode 30 and the lower silver pattern electrode 50 having the same width. By laminating the double-sided adhesive tape layer 40 longer than the length of the width, the double-sided adhesive tape layer 40 is contained in the double-sided adhesive tape layer 40 while contacting the upper and lower ITO film layers 20, 60. A component causes corrosion of the ITO layer 61 of the upper and lower ITO film layers 20 and 60, and this corrosion phenomenon causes irregular electrical signals between the upper and lower ITO film layers 20 and 60. Problems such as touch misunderstanding and undetected will occur, and the double-sided adhesive tape may cause a phenomenon that additionally inhibits the original adhesion while generating the compound.

In the present invention, as shown in FIGS. 2 to 4, the V / A (View Area) boundary surface is a boundary surface of the visible area, and means a boundary surface between the frame of the touch screen and the lower LCD screen.

In the present invention, the ITO of the upper ITO film layer 20 or the lower ITO film layer 60 may be replaced with a transparent conductive film. Examples of the transparent conductive film usable in the present invention include an ITO layer , CNT (carbon nanotube), silver nanowires, thin film nickel, and the like. In addition to the above-mentioned types, all of the transparent conductive films having the same or higher properties as those of ITO are applicable. Can be done.

In addition, in the present invention, the upper and lower silver pattern electrodes 30 and 50 may be formed of an electrode using a conductive material as an alternative material other than silver, that is, using a material such as platinum, copper, aluminum, or Conductive high molecular weight polymer selected from the group consisting of polyaniline, polyacetylene, polypyrrole, polythiophene, poly-3-alkylthiophene, polyphenylene sulfide, polyfuran, polythienylenevinylene and polydiethylene It is preferable to use a compound, and in the case of a material having conductive properties, even a material other than the above-mentioned types can be used.

In addition, the pattern electrode is formed of a method of printing or vapor deposition using a silver or other conductive material. The method of printing or vapor deposition, which is a method for forming an electrode in the above, is carried out by a conventional method.

In the present invention, the double-sided adhesive tape used in the double-sided adhesive tape layer 40 may be a conventional adhesive as the substitute material, and in the case of the adhesive, an adhesive layer is formed by a printing method. Formation of the adhesive layer in the above is carried out by a conventional printing method.

Accordingly, the present invention is a touch screen panel having a structure in which the upper and lower ITO film layers are not damaged by the double-sided adhesive tape or adhesive as described above, and the connection of the electrical signals between the upper and lower ITO film layers is smooth. It is characterized by improved quality.

As described above, the touch screen panel according to a preferred embodiment of the present invention has been shown in accordance with the above description and drawings, but this is merely described, for example, and various changes and modifications within the scope without departing from the technical spirit of the present invention. It will be appreciated by those skilled in the art that this is possible.

1 is a view showing a plane of a touch screen in a conventional touch screen panel;

       2 is a cross-sectional view showing a plane taken along the line AA ′ of FIG. 1;

       3 is a cross-sectional view showing a surface (base surface: lower ITO film layer) cut along a line A-A 'of a touch screen panel having a zigzag pattern structure as an embodiment according to the present invention;

       4 is a cross-sectional view showing a surface (base surface: ITO PC or ITO glass plate) cut in the direction A-A 'of a touch screen panel having a zigzag pattern structure as another embodiment according to the present invention;

FIG. 5 is a plan view showing an etching part formed in the drawings of FIGS. 3 and 4;

FIG. 6 is a cross-sectional view illustrating a state in which an etching part is formed in FIG. 3; FIG.

FIG. 7 is a cross-sectional view illustrating a state in which an etching part is formed in FIG. 4.

Explanation of symbols on the main parts of the drawings

100: touch screen panel 10: upper OCA layer

20: upper ITO film layer 30: upper silver pattern electrode

40: double-sided adhesive tape layer 50: lower silver pattern electrode

60: lower ITO film layer 61: ITO layer

62: PET film layer 63: etching portion

70: lower OCA layer 80: plastic PC or tempered glass reinforcement plate

81: ITO PC or ITO Glass Plate

Claims (11)

Touch screen consisting of laminated structure of upper OCA layer, upper ITO film layer, upper silver pattern electrode, double-sided adhesive tape layer, lower silver pattern electrode, lower ITO film layer, lower OCA layer and plastic PC or tempered glass reinforcement plate In the panel, The upper silver pattern electrode is structured such that the width of the double-sided adhesive tape layer does not touch the upper ITO film layer by stacking the width of the upper side of the double-sided adhesive tape layer in the same length as the width of the double-sided adhesive tape layer toward the view area. , A touch screen panel having a zigzag pattern structure, wherein an etching part is formed by a wet etching method or a dry etching method in a direction orthogonal to the width of the lower ITO film layer. The touch screen panel having a zigzag pattern structure is a touch screen panel which is formed by stacking an upper OCA layer, an upper ITO film layer, an upper silver pattern electrode, a double-sided adhesive tape layer, a lower silver pattern electrode, and an ITO PC or ITO glass plate. In The upper silver pattern electrode is structured such that the width of the double-sided adhesive tape layer does not touch the upper ITO film layer by stacking the width of the upper side of the double-sided adhesive tape layer in the same length as the width of the double-sided adhesive tape layer toward the view area. , A touch screen panel having a zigzag pattern structure, wherein an etching part is formed by a wet etching method or a dry etching method in a direction orthogonal to the width of the ITO PC or the ITO glass plate. delete delete delete The method of claim 1, The lower ITO film layer is a touch screen panel having a zigzag pattern structure, characterized in that the etching to the position where the PET film layer is exposed. delete The method of claim 1, Touch screen panel having a zigzag pattern structure, characterized in that the ITO of the upper ITO film layer or the lower ITO film layer can be replaced by a transparent conductive film. The method of claim 1, The silver patternon electrode may be made of a material such as platinum, copper, or aluminum as an alternative material of silver, or polyaniline, polyacetylene, polypyrrole, polythiophene, poly-3-alkylthiophene, polyphenylene sulfide, polyfuran, poly A touch screen panel having a zigzag pattern structure, wherein an electrode is formed by selecting one kind from a group consisting of a conductive polymer compound of thienylenevinylene and polydiethylene. The method of claim 9, The silver patternon electrode may be made of silver or platinum, copper, aluminum, or polyaniline, polyacetylene, polypyrrole, polythiophene, poly-3-alkylthiophene, polyphenylene sulfide, polyfuran, polythienylenevinyl Touch screen panel having a zigzag pattern structure, characterized in that the electrode is formed by a method of printing or deposition by selecting one of the group consisting of a conductive polymer compound of lene, polydiethylene. The method of claim 1, The double-sided adhesive tape layer is a substitute material for the double-sided adhesive tape, the touch screen panel having a zigzag pattern structure, characterized in that to form a layer by printing using an adhesive.

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