WO2015016473A1 - Touch screen panel and method for manufacturing same - Google Patents

Touch screen panel and method for manufacturing same Download PDF

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Publication number
WO2015016473A1
WO2015016473A1 PCT/KR2014/004656 KR2014004656W WO2015016473A1 WO 2015016473 A1 WO2015016473 A1 WO 2015016473A1 KR 2014004656 W KR2014004656 W KR 2014004656W WO 2015016473 A1 WO2015016473 A1 WO 2015016473A1
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Prior art keywords
sensing pattern
sensing
pattern
touch screen
screen panel
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PCT/KR2014/004656
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French (fr)
Korean (ko)
Inventor
임정구
이종수
임거산
최선미
하경수
김상수
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동우화인켐 주식회사
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Publication of WO2015016473A1 publication Critical patent/WO2015016473A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • Embodiments of the present invention relate to a flat panel display technology, and more particularly, to a touch screen panel and a method of manufacturing the same.
  • the touch screen device refers to a device that controls the electronic device by recognizing the coordinate value of the touched point when the display screen is touched with a finger or a pen.
  • the touch screen device has various methods such as a capacitive method, a resistive film method, a surface wave method using infrared rays or ultrasonic waves, etc. according to the applied technology.
  • the second sensing electrode pattern is formed so that the first sensing electrode pattern and the second sensing electrode pattern do not contact each other while forming the first sensing electrode pattern and the second sensing electrode pattern of the touch screen on the same plane. (Or the first sensing electrode patterns) took the manner of interconnecting via bridge patterns formed on different planes.
  • the first sensing electrode pattern 20-1 and the second sensing electrode pattern 20-2 are mutually formed in a rhombus shape on a transparent substrate (not shown). It is densely formed and regularly formed.
  • the first sensing patterns 20-1 are formed in a plurality of rows on a transparent substrate (not shown), and the first sensing patterns 20-1 disposed in the same row are connected to each other.
  • the second sensing patterns 20-2 are formed in a plurality of rows on a transparent substrate (not shown), and the second sensing patterns 20-2 arranged in the same column are formed to be spaced apart from each other.
  • a bridge pattern is used to interconnect the second sensing patterns 20-2 spaced apart from each other.
  • FIGS. 2A and 2B are plan and cross-sectional views illustrating a state in which second sensing patterns are connected through a bridge pattern in a conventional touch screen panel.
  • a conventional touch screen panel manufacturing method is described.
  • a first sensing electrode pattern 20-1 and a second sensing electrode pattern 20-2 are formed on a transparent substrate 10.
  • the first sensing electrode patterns 20-1 arranged in the same row are connected to each other, and the second sensing electrode patterns 20-2 arranged in the same column are formed to be spaced apart from each other.
  • the insulating layer 30 is formed on the transparent substrate 10 by surrounding the first sensing electrode pattern 20-1 and the second sensing electrode pattern 20-2.
  • a contact hole 40 is formed in the insulating layer 30 on the second sensing electrode pattern 20-2.
  • the bridge pattern 50 is formed on the insulating layer 30 while filling the contact hole 40 to interconnect the second sensing electrode patterns 20-2.
  • the contact hole 40 and the bridge pattern 50 are required to connect the second sensing electrode patterns 20-2.
  • the contact hole 40 has a small area and thus a large contact resistance.
  • the electrical conductivity between the second sensing electrode patterns 20-2 is lowered, which makes it difficult to apply the large area.
  • a photolithography process for forming the contact hole 40 is added, thereby making the manufacturing process complicated.
  • the first sensing electrode pattern 20-1 and the second sensing electrode pattern 20-2 are located at the same plane, the first sensing electrode pattern 20-1 and the second sensing electrode pattern 20-20 are located in the same plane.
  • the interval between 2) must be maintained at a predetermined interval or more, and a defect in the manufacturing process may occur, such as a short circuit between the first sensing electrode pattern 20-1 and the second sensing electrode pattern 20-2.
  • the present invention is to provide a touch screen panel and a method of manufacturing the same that can improve the electrical conductivity of the sensing electrode patterns.
  • the present invention is to provide a touch screen panel and a method of manufacturing the same that can improve the touch sensitivity and visibility.
  • the interval is a polygon of the first sensing pattern and the second sensing pattern projected on the same plane Touch screen panel, which is the interval between them.
  • the forming the first sensing pattern is formed on the upper surface of the base member by using at least one of sputtering, photolithography, screen printing with a conductive material, manufacturing method of the touch screen panel .
  • the base member is a plastic substrate or a glass substrate, manufacturing method of the touch screen panel.
  • the touch screen panel of the present invention by forming the first sensing pattern and the second sensing pattern on different planes, the touch screen panel can be formed by interconnecting the sensing patterns without the bridge pattern and the contact hole. In this case, it is not necessary to perform the photolithography process for forming the contact hole, and only a lamination process may be performed, thereby simplifying the manufacturing process and reducing manufacturing time and cost. In addition, since there is no phenomenon of lowering the electrical conductivity due to the high contact resistance of the contact hole, the electrical conductivity can be improved. In addition, since the first sensing pattern and the second sensing pattern are formed on different planes, the first sensing pattern and the second sensing pattern may be formed by screen printing, thereby forming a large touch screen panel. It becomes possible.
  • the touch screen panel of the present invention may improve the touch sensitivity and improve the visibility of the sensing pattern by forming the first sensing pattern and the second sensing pattern having an interval less than a specific distance.
  • FIG. 1 is a diagram illustrating an arrangement state of a first sensing electrode pattern and a second sensing electrode pattern in a conventional touch screen panel.
  • FIG. 2 is a view illustrating a state in which second sensing patterns are connected through a bridge pattern in a conventional touch screen panel.
  • FIG. 3 is a diagram illustrating a touch screen panel according to an exemplary embodiment of the present invention.
  • FIG. 4 is a plan view schematically illustrating a change in interval between a first sensing pattern and a second sensing pattern.
  • FIG. 5 is a diagram illustrating a touch screen panel according to another exemplary embodiment of the present invention.
  • FIG. 6 illustrates a method of manufacturing a touch screen panel according to an exemplary embodiment of the present invention.
  • FIG. 7 illustrates a method of manufacturing a touch screen panel according to another exemplary embodiment of the present invention.
  • the present invention includes a first sensing pattern formed on the lower surface of the insulating layer and a second sensing pattern formed on the upper surface, wherein the first sensing pattern and the second sensing pattern are formed in different directions, and the first sensing When the pattern and the second sensing pattern are projected on the same plane, the distance is 4 ⁇ m or less, and the present invention relates to a touch screen panel having improved electrical conductivity, touch sensitivity, and visibility, and a method of manufacturing the same.
  • FIG. 3 is a diagram illustrating a touch screen panel according to an exemplary embodiment of the present invention.
  • the touch screen panel 100 includes a first sensing pattern 104, an insulating layer 106, and a second sensing pattern 108 formed on the base member 102.
  • the base member 102 may use a transparent substrate (or film).
  • the base member 102 may be a glass substrate or a plastic substrate, but is not limited thereto.
  • the base member 102 may be made of a flexible material.
  • the first sensing pattern 104 is formed on the base member 102.
  • the first sensing patterns 104 are formed in a plurality of rows on the base member 102, and the first sensing patterns 104 disposed in the same row are connected to each other.
  • the first sensing pattern 104 may be formed, for example, in a polygonal shape. Examples of the polygon may include a triangle, a square (a rhombus, a rectangle, a square), a hexagon, and the like, but the shape of the first sensing pattern 104 is not limited thereto, and may be formed in various shapes other than this. Of course.
  • the first sensing pattern 104 may be formed of, for example, a conductive material such as indium tin-oxide (ITO), metal nano-wire, metal mesh, graphene, or organic electrode. It may be made, it may be made of a transparent electrode.
  • the transparent electrode refers to an electrode that is not visually identified, and thus includes a case where the material itself is non-transparent, even if it is not visually identified due to the fine structure.
  • the first sensing pattern 104 may be embedded in the insulating layer so that the surface thereof is the same as the insulating layer, but is not limited thereto. If necessary, the first sensing pattern 104 may protrude from the surface of the insulating layer. It may be formed to be.
  • the insulating layer 106 is formed to surround the first sensing pattern 104 on the base member 102.
  • the insulating layer 106 serves to electrically insulate the first sensing pattern 104 and the second sensing pattern 108 while protecting the base member 102.
  • the insulating layer 106 may be made of an inorganic material or an organic material.
  • an inorganic material such as SiO 2 may be formed by, for example, a sputtering method.
  • the durability of the insulating layer 106 can be maintained at a predetermined level.
  • the insulating layer 106 When the insulating layer 106 is formed of an organic material, it may be formed by applying an organic material such as a photocurable resin and then curing it. Since the organic material is baked at a relatively low temperature (eg, about 220 ° C.), the polarizer (not shown) is formed when a polarizer (not shown) is formed between the base member 102 and the insulating layer 106. Will not damage.
  • the insulating layer 106 is preferably formed of an organic material.
  • the second sensing pattern 108 is formed on the insulating layer 106.
  • the second sensing patterns 108 are formed in a plurality of rows on the insulating layer 106, and the second sensing patterns 108 arranged in the same columns are connected to each other. That is, since the second sensing pattern 108 is formed on a different plane from the first sensing pattern 104, the second sensing patterns 108 arranged in the same column may be connected to each other.
  • the second sensing pattern 108 is formed in a direction different from the first sensing pattern 104 (eg, orthogonal to each other), so that the first sensing pattern 104 and the second sensing pattern 108 are formed in a different direction. Provides information about the X and Y coordinates of the touched point.
  • the second sensing pattern 108 may be formed in, for example, a polygonal shape.
  • the polygon may include a triangle, a square (a rhombus, a rectangle, a square), a hexagon, and the like, but the shape of the first sensing pattern 104 is not limited thereto, and may be formed in various shapes other than this.
  • the second sensing pattern 108 may be formed of, for example, a conductive material such as indium tin oxide (ITO), metal nano-wire, metal mesh, graphene, or organic electrode. It may be made, it may be made of a transparent electrode.
  • ITO indium tin oxide
  • metal nano-wire metal nano-wire
  • metal mesh metal mesh
  • graphene graphene
  • organic electrode organic electrode
  • the gap W is formed to be 4 ⁇ m or less.
  • the first sensing pattern 20-1 and the second sensing pattern 20-2 are formed due to a problem such as interference between the patterns.
  • the first sensing pattern 20-1 and the second sensing pattern 20-2 may be formed to be spaced apart by a predetermined interval or more.
  • the first sensing pattern 104 and the second sensing pattern 108 are formed by forming the first sensing pattern 104 and the second sensing pattern 108 on different planes. It can be formed regardless of the spacing.
  • the first sensing pattern 104 and the second sensing pattern 108 are projected on the same plane, when the distance becomes 4 ⁇ m or less, the first sensing pattern 104 and the second sensing pattern are present.
  • the capacitance that occurs between the 108 and the capacitance is significantly increased to focus on improving the touch sensitivity.
  • the sensitivity of the touch may be expressed as mutual capacitance (Cm) generated between the first sensing pattern 104 and the second sensing pattern 108 when the touch is performed.
  • Cm mutual capacitance
  • ⁇ Cm represents the change in Cm before and after touching.
  • the mutual capacitance Cm occurring between the first sensing pattern 104 and the second sensing pattern 108 is represented by Equation 1 below.
  • ⁇ is the dielectric constant
  • A is the cross-sectional area
  • d is the distance between the patterns.
  • ⁇ Cm represents a change in the Cm before and after the touch (base Cm) and after the touch (touch Cm)
  • a large value of ⁇ Cm means that the signal difference between the touch and the touch is large and the touch sensitivity is excellent.
  • the signal-to-noise ratio in the touch screen panel may be represented by the ratio of Cm and C cell .
  • C cell refers to capacitance generated in cell electrodes other than the first sensing pattern 104 and the second sensing pattern 108 (for example, an LCD electrode or an OLED electrode).
  • C cell acts as a kind of noise as unwanted capacitance in the touch screen.
  • the base Cm value is greatly increased compared to the case where the first sensing pattern 104 and the second sensing pattern 108 are smaller than 4 ⁇ m, thereby improving the touch sensitivity.
  • the lower limit of the interval is not particularly limited within the range where such a trend is maintained.
  • the interval may be zero.
  • FIG. 4 schematically illustrates a change in interval between the first sensing pattern and the second sensing pattern
  • FIG. 5 schematically illustrates another embodiment of the present invention when the interval has a negative value.
  • the area of the overlapping area is not particularly limited, but, for example, 50% or less based on the total area of the first sensing pattern 104 or the second sensing pattern 108.
  • the sensing pattern of the present invention can significantly improve visibility by having the interval within the above range.
  • the detection pattern is visually identified by the difference in reflectance between the pattern portion and the non-pattern portion.
  • visibility is reduced.
  • the present invention has been conceived in light of the fact that when the spacing between patterns is 4 ⁇ ⁇ or less, the area of the non-pattern portion is significantly narrowed and becomes indistinguishable to the naked eye.
  • the spacing between patterns may be 4 ⁇ m or less, preferably 3 ⁇ m or less. As the spacing between patterns becomes smaller, the non-pattern part cannot be identified, so the lower limit of the spacing is not particularly limited.
  • the second sensing pattern 108 may be formed to protrude from the surface of the insulating layer. However, if necessary, the second sensing pattern 108 may be embedded in the insulating layer to have the same surface as the insulating layer.
  • the present invention also provides a method of manufacturing a touch screen panel.
  • FIG. 6 illustrates a method of manufacturing a touch screen panel according to an exemplary embodiment of the present invention.
  • the first sensing pattern 104 is formed on the base member 102 (FIG. 6A).
  • the first sensing pattern 104 may be formed, for example, by screen printing.
  • the first sensing pattern 104 may be made of a metal nanowire or a metal mesh.
  • the present invention is not limited thereto, and the first sensing pattern 104 may be formed by a sputtering method, a photolithography method, or various other methods.
  • a conductive material may be used without limitation, materials known in the art, such as indium tin-oxide (ITO), graphene, and organic electrodes.
  • an insulating layer 106 is formed on the first sensing pattern 104 on the base member 102 (FIG. 6B).
  • the insulating layer 106 may be formed by depositing an inorganic material or by coating an organic material.
  • a second sensing pattern 108 is formed on the insulating layer 106 (FIG. 4C).
  • the second sensing pattern 108 may be formed to have a spacing of 4 ⁇ m or less when projected onto the same plane as the first sensing pattern 104.
  • the second sensing pattern 108 may be formed, for example, by screen printing.
  • the second sensing pattern 108 may be made of a metal nanowire or a metal mesh.
  • the present invention is not limited thereto, and the second sensing pattern 108 may be formed by a sputtering method, a photolithography method, or various other methods.
  • a conductive material may be used without limitation, materials known in the art, such as indium tin-oxide (ITO), graphene, and organic electrodes.
  • the first sensing pattern 104 and the second sensing pattern 108 are formed on different planes, thereby interconnecting the second sensing patterns 108 in the same row without the bridge pattern and the contact hole. Can be formed. In this case, it is not necessary to perform the photolithography process for forming the contact hole, and only a lamination process may be performed, thereby simplifying the manufacturing process and reducing manufacturing time and cost. In addition, since there is no phenomenon of lowering the electrical conductivity due to the high contact resistance of the contact hole, the electrical conductivity can be improved.
  • the first sensing pattern 104 and the second sensing pattern 108 are formed on different planes, the first sensing pattern 104 and the second sensing pattern 108 may be formed by screen printing. As a result, the touch screen panel 100 can be formed in a large area. In addition, by forming the first sensing pattern 104 and the second sensing pattern 108 to be 4 ⁇ m or less, it is possible to improve the touch sensitivity.
  • FIG. 7 shows a manufacturing method in which the first sensing pattern and the second sensing pattern are formed to overlap when projected on the same plane (the interval W has a negative value). It is.
  • the manufacturing method according to FIG. 7 may be performed in the same category as the manufacturing method described with reference to FIG. 6 except that the interval W has a negative value.
  • ITO was sputtered on the PES polymer substrate to form a rhombus-shaped first sensing pattern, and an organic insulating film was coated thereon, and ITO was again sputtered on the second sensing pattern in the form of rhombus.
  • the distance between the first sensing pattern and the second sensing pattern is increased from 4 ⁇ m or less and Cm is increased. As a result, the touch sensitivity may be improved.
  • the spacing between the patterns is 4 ⁇ m or less
  • the spacing between the electrodes is narrower than the visually visible range, making it almost impossible to identify the sensing pattern.

Abstract

The present invention relates to a touch screen panel and a method for manufacturing the same and, more specifically, to a touch screen panel and a method for manufacturing the same, the touch screen panel comprising: a first sensing pattern formed on the bottom surface of an insulating layer and a second sensing pattern formed on the top surface thereof, wherein the first sensing pattern and the second sensing pattern are formed in different directions to each other, and when the first sensing pattern and the second sensing pattern are projected onto the same plane, the spacing therebetween is no more than 4㎛ so that electric conductivity, touch sensitivity and visibility are improved.

Description

터치 스크린 패널 및 그 제조 방법Touch screen panel and its manufacturing method
본 발명의 실시예는 평판 표시 장치 기술에 관한 것으로, 보다 상세하게는 터치 스크린 패널 및 그 제조 방법에 관한 것이다.Embodiments of the present invention relate to a flat panel display technology, and more particularly, to a touch screen panel and a method of manufacturing the same.
터치 스크린 장치는 디스플레이 화면을 손가락이나 펜 등으로 접촉시키는 경우, 그 접촉된 지점의 좌표값을 인식하여 해당 전자 기기의 제어를 수행하는 장치를 말한다. 터치 스크린 장치는 그 적용 기술에 따라 정전용량 방식, 저항막 방식, 적외선 또는 초음파 등을 이용한 표면파 방식 등 다양한 방식이 존재한다. The touch screen device refers to a device that controls the electronic device by recognizing the coordinate value of the touched point when the display screen is touched with a finger or a pen. The touch screen device has various methods such as a capacitive method, a resistive film method, a surface wave method using infrared rays or ultrasonic waves, etc. according to the applied technology.
종래의 터치 스크린 패널에서는, 터치 스크린의 제1 감지 전극 패턴과 제2 감지 전극 패턴을 동일 평면에 형성하면서 제1 감지 전극 패턴과 제2 감지 전극 패턴이 서로 접촉되지 않도록 하기 위해 제2 감지 전극 패턴(또는 제1 감지 전극 패턴)들은 다른 평면상에 형성된 브릿지 패턴을 통해 상호 연결하는 방식을 취하였다.In the conventional touch screen panel, the second sensing electrode pattern is formed so that the first sensing electrode pattern and the second sensing electrode pattern do not contact each other while forming the first sensing electrode pattern and the second sensing electrode pattern of the touch screen on the same plane. (Or the first sensing electrode patterns) took the manner of interconnecting via bridge patterns formed on different planes.
즉, 도 1에 도시된 바와 같이, 종래의 터치 스크린 패널에서는 제1 감지 전극 패턴(20-1) 및 제2 감지 전극 패턴(20-2)이 투명 기판(미도시) 상에 마름모 형상으로 상호 밀집하여 규칙적으로 형성되게 된다. 여기서, 제1 감지 패턴(20-1)은 투명 기판(미도시) 상에 복수 개의 행을 이루며 형성되고, 동일한 행에 배치되는 제1 감지 패턴(20-1)들은 상호 연결되어 형성된다. 반면, 제2 감지 패턴(20-2)은 투명 기판(미도시) 상에 복수 개의 열을 이루며 형성되고, 동일한 열에 배치되는 제2 감지 패턴(20-2)들은 상호 이격되어 형성된다. 여기서, 상호 이격된 제2 감지 패턴(20-2)들을 상호 연결하기 위해 브릿지 패턴이 사용된다.That is, as illustrated in FIG. 1, in the conventional touch screen panel, the first sensing electrode pattern 20-1 and the second sensing electrode pattern 20-2 are mutually formed in a rhombus shape on a transparent substrate (not shown). It is densely formed and regularly formed. Here, the first sensing patterns 20-1 are formed in a plurality of rows on a transparent substrate (not shown), and the first sensing patterns 20-1 disposed in the same row are connected to each other. In contrast, the second sensing patterns 20-2 are formed in a plurality of rows on a transparent substrate (not shown), and the second sensing patterns 20-2 arranged in the same column are formed to be spaced apart from each other. Here, a bridge pattern is used to interconnect the second sensing patterns 20-2 spaced apart from each other.
도 2의 (a) 및 도 2의 (b)는 종래의 터치 스크린 패널에서 브릿지 패턴을 통해 제2 감지 패턴들이 연결되는 상태를 나타낸 평면도 및 단면도이다. 2A and 2B are plan and cross-sectional views illustrating a state in which second sensing patterns are connected through a bridge pattern in a conventional touch screen panel.
도 2를 참조하여 종래의 터치 스크린 패널 제조 방법을 살펴보면, 먼저 투명 기판(10) 상에 제1 감지 전극 패턴(20-1) 및 제2 감지 전극 패턴(20-2)을 형성한다. 이때, 동일한 행에 배치되는 제1 감지 전극 패턴(20-1)들은 상호 연결하여 형성하고, 동일한 열에 배치되는 제2 감지 전극 패턴(20-2)들은 상호 이격하여 형성한다. 다음으로, 투명 기판(10) 상부에 제1 감지 전극 패턴(20-1) 및 제2 감지 전극 패턴(20-2)을 감싸며 절연층(30)을 형성한다. 다음으로, 제2 감지 전극 패턴(20-2) 상의 절연층(30)에 컨택트 홀(40)을 형성한다. 다음으로, 컨택트 홀(40)을 충진하면서 절연층(30) 상에 브릿지 패턴(50)을 형성하여 제2 감지 전극 패턴(20-2)들을 상호 연결한다.Referring to FIG. 2, a conventional touch screen panel manufacturing method is described. First, a first sensing electrode pattern 20-1 and a second sensing electrode pattern 20-2 are formed on a transparent substrate 10. In this case, the first sensing electrode patterns 20-1 arranged in the same row are connected to each other, and the second sensing electrode patterns 20-2 arranged in the same column are formed to be spaced apart from each other. Next, the insulating layer 30 is formed on the transparent substrate 10 by surrounding the first sensing electrode pattern 20-1 and the second sensing electrode pattern 20-2. Next, a contact hole 40 is formed in the insulating layer 30 on the second sensing electrode pattern 20-2. Next, the bridge pattern 50 is formed on the insulating layer 30 while filling the contact hole 40 to interconnect the second sensing electrode patterns 20-2.
종래의 터치 스크린 패널에 의하면, 제2 감지 전극 패턴(20-2)들을 연결하기 위해서는 컨택트 홀(40) 및 브릿지 패턴(50)이 필요하게 된다. 이때, 컨택트 홀(40)은 그 면적이 작아 접촉 저항이 커지게 되며, 그로 인해 제2 감지 전극 패턴(20-2)들 간의 전기 전도도가 저하되고, 대면적에 적용하기 어려운 문제점이 있다. 그리고, 컨택트 홀(40)을 형성하기 위한 포토리소그래피 공정이 추가되어 제조 공정이 복잡해지는 문제점이 있다. 또한, 제1 감지 전극 패턴(20-1)과 제2 감지 전극 패턴(20-2)이 동일 평면에 위치하기 때문에, 제1 감지 전극 패턴(20-1)과 제2 감지 전극 패턴(20-2) 간의 간격을 일정 간격 이상으로 유지하여야 하고, 제1 감지 전극 패턴(20-1)과 제2 감지 전극 패턴(20-2) 간에 단락이 발생하는 등 제조 공정 상의 불량이 발생할 수 있게 된다.According to the conventional touch screen panel, the contact hole 40 and the bridge pattern 50 are required to connect the second sensing electrode patterns 20-2. In this case, the contact hole 40 has a small area and thus a large contact resistance. As a result, the electrical conductivity between the second sensing electrode patterns 20-2 is lowered, which makes it difficult to apply the large area. In addition, a photolithography process for forming the contact hole 40 is added, thereby making the manufacturing process complicated. In addition, since the first sensing electrode pattern 20-1 and the second sensing electrode pattern 20-2 are located at the same plane, the first sensing electrode pattern 20-1 and the second sensing electrode pattern 20-20 are located in the same plane. The interval between 2) must be maintained at a predetermined interval or more, and a defect in the manufacturing process may occur, such as a short circuit between the first sensing electrode pattern 20-1 and the second sensing electrode pattern 20-2.
본 발명은 감지 전극 패턴들의 전기 전도도를 향상시킬 수 있는 터치 스크린 패널 및 그 제조 방법을 제공하고자 한다.The present invention is to provide a touch screen panel and a method of manufacturing the same that can improve the electrical conductivity of the sensing electrode patterns.
본 발명은 터치 민감도 및 시인성을 향상시킬 수 있는 터치 스크린 패널 및 그 제조 방법을 제공하고자 한다.The present invention is to provide a touch screen panel and a method of manufacturing the same that can improve the touch sensitivity and visibility.
1. 절연층의 하면에 형성되는 제1 감지 패턴과 상면에 형성되는 제2 감지 패턴을 포함하며, 상기 제1 감지 패턴과 제2 감지 패턴은 서로 다른 방향으로 형성되고, 상기 제1 감지 패턴과 제2 감지 패턴을 동일 평면 상에 투사하는 경우 그 간격이 4㎛ 이하인, 터치 스크린 패널.1. A first sensing pattern formed on a lower surface of an insulating layer and a second sensing pattern formed on an upper surface, wherein the first sensing pattern and the second sensing pattern are formed in different directions. And a distance of 4 μm or less when projecting the second sensing pattern on the same plane.
2. 위 1에 있어서, 상기 제1 감지 패턴과 제2 감지 패턴은 서로 독립적으로 다각형 형태의 패턴이 연결된 형태이고, 상기 간격은 동일 평면 상에 투사된 제1 감지 패턴과 제2 감지 패턴의 다각형 간의 간격인, 터치 스크린 패널.2. In the above 1, wherein the first sensing pattern and the second sensing pattern is a form in which a polygonal pattern is connected independently of each other, the interval is a polygon of the first sensing pattern and the second sensing pattern projected on the same plane Touch screen panel, which is the interval between them.
3. 위 1에 있어서, 상기 제1 감지 패턴과 상기 제2 감지 패턴은 서로 독립적으로 절연층에 매립되어 그 표면이 절연층과 동일하도록 형성되거나 절연층의 일면에서 돌출되도록 형성되는, 터치 스크린 패널.3. The touch screen panel of 1 above, wherein the first sensing pattern and the second sensing pattern are embedded in an insulating layer independently of each other, and the surface thereof is formed to be the same as the insulating layer or protruded from one surface of the insulating layer. .
4. 위 1에 있어서, 동일 평면 상에 투사된 제1 감지 패턴과 제2 감지 패턴이 겹치게 되는, 터치 스크린 패널4. In the above 1, the touch screen panel, the first sensing pattern and the second sensing pattern projected on the same plane overlap
5. 베이스 부재의 상부면에 제1 감지 패턴을 형성하는 단계; 상기 베이스 부재의 상부에서 상기 제1 감지 패턴 상에 절연층을 형성하는 단계; 및 상기 제1 감지 패턴과 동일 평면에 투사되었을 때 간격이 4㎛ 이하가 되도록 상기 절연층의 상면에 제2 감지 패턴을 형성하는 단계를 포함하는, 터치 스크린 패널의 제조방법.5. forming a first sensing pattern on the top surface of the base member; Forming an insulating layer on the first sensing pattern on the base member; And forming a second sensing pattern on the upper surface of the insulating layer so that the interval is 4 μm or less when projected on the same plane as the first sensing pattern.
6. 위 5에 있어서, 상기 제1 감지 패턴을 형성하는 단계는, 상기 베이스 부재의 상부면에 도전성 물질로 스퍼터링, 포토리소그래피, 스크린 인쇄 중 적어도 하나를 이용하여 형성하는, 터치 스크린 패널의 제조 방법.6. In the above 5, wherein the forming the first sensing pattern is formed on the upper surface of the base member by using at least one of sputtering, photolithography, screen printing with a conductive material, manufacturing method of the touch screen panel .
7. 위 5에 있어서, 상기 제2 감지 패턴을 형성하는 단계는, 상기 절연층의 상부면에 도전성 물질로 스퍼터링, 포토리소그래피, 스크린 인쇄 중 적어도 하나를 이용하여 형성하는, 터치 스크린 패널의 제조 방법.7. The method of claim 5, wherein the forming of the second sensing pattern is formed by using at least one of sputtering, photolithography, and screen printing as a conductive material on the upper surface of the insulating layer, the manufacturing method of the touch screen panel. .
8. 위 5에 있어서, 상기 제1 감지 패턴과 제2 감지 패턴은 동일 평면 상에 투사되었을 때 겹치게 되도록 형성되는, 터치 스크린 패널의 제조 방법.8. The method of claim 5, wherein the first sensing pattern and the second sensing pattern are formed to overlap when projected on the same plane.
9. 위 5에 있어서, 상기 베이스 부재는 플라스틱 기판 또는 유리 기판인, 터치 스크린 패널의 제조 방법.9. In the above 5, wherein the base member is a plastic substrate or a glass substrate, manufacturing method of the touch screen panel.
본 발명의 터치 스크린 패널은, 제1 감지 패턴과 제2 감지 패턴을 서로 다른 평면에 형성함으로써, 브릿지 패턴 및 컨택트 홀이 없이도 감지 패턴을 상호 연결하여 형성할 수 있게 된다. 이 경우, 컨택트 홀을 형성하기 위한 포토리소그래피 공정을 수행하지 않아도 되며 단순히 적층식 공정만 수행하면 되므로, 제조 공정을 단순화 할 수 있고 제조 시간 및 비용을 줄일 수 있게 된다. 또한, 컨택트 홀의 높은 접촉 저항에 따른 전기 전도도 저하 현상이 없으므로, 전기 전도도를 개선할 수 있게 된다. 또한, 제1 감지 패턴과 제2 감지 패턴이 서로 다른 평면에 형성되기 때문에, 제1 감지 패턴 및 제2 감지 패턴을 스크린 인쇄법으로도 형성할 수 있으며 그로 인해 터치 스크린 패널을 대면적으로 형성할 수 있게 된다. In the touch screen panel of the present invention, by forming the first sensing pattern and the second sensing pattern on different planes, the touch screen panel can be formed by interconnecting the sensing patterns without the bridge pattern and the contact hole. In this case, it is not necessary to perform the photolithography process for forming the contact hole, and only a lamination process may be performed, thereby simplifying the manufacturing process and reducing manufacturing time and cost. In addition, since there is no phenomenon of lowering the electrical conductivity due to the high contact resistance of the contact hole, the electrical conductivity can be improved. In addition, since the first sensing pattern and the second sensing pattern are formed on different planes, the first sensing pattern and the second sensing pattern may be formed by screen printing, thereby forming a large touch screen panel. It becomes possible.
또한, 본 발명의 터치 스크린 패널은, 특정 거리 이하의 간격을 갖는 제1 감지 패턴과 제2 감지 패턴을 형성함으로써, 터치 민감도를 향상시킬 수 있으며, 감지 패턴의 시인성을 개선할 수 있다.In addition, the touch screen panel of the present invention may improve the touch sensitivity and improve the visibility of the sensing pattern by forming the first sensing pattern and the second sensing pattern having an interval less than a specific distance.
도 1은 종래의 터치 스크린 패널에서 제1 감지 전극 패턴 및 제2 감지 전극 패턴의 배열 상태를 나타낸 도면이다.1 is a diagram illustrating an arrangement state of a first sensing electrode pattern and a second sensing electrode pattern in a conventional touch screen panel.
도 2는 종래의 터치 스크린 패널에서 브릿지 패턴을 통해 제2 감지 패턴들이 연결되는 상태를 나타낸 도면이다.2 is a view illustrating a state in which second sensing patterns are connected through a bridge pattern in a conventional touch screen panel.
도 3은 본 발명의 일 실시예에 따른 터치 스크린 패널을 나타낸 도면이다.3 is a diagram illustrating a touch screen panel according to an exemplary embodiment of the present invention.
도 4는 제1 감지 패턴과 제2 감지 패턴 간의 간격 변화를 개략적으로 나타내는 평면도면이다.4 is a plan view schematically illustrating a change in interval between a first sensing pattern and a second sensing pattern.
도 5는 본 발명의 다른 일 실시예에 따른 터치 스크린 패널을 나타낸 도면이다.5 is a diagram illustrating a touch screen panel according to another exemplary embodiment of the present invention.
도 6은 본 발명의 일 실시예에 따른 터치 스크린 패널의 제조 방법을 나타낸 도면이다.6 illustrates a method of manufacturing a touch screen panel according to an exemplary embodiment of the present invention.
도 7은 본 발명의 다른 일 실시예에 따른 터치 스크린 패널의 제조 방법을 나타낸 도면이다.7 illustrates a method of manufacturing a touch screen panel according to another exemplary embodiment of the present invention.
도 8은 실시예 및 비교예들의 Cm 값을 나타낸 그래프이다.8 is a graph showing Cm values of Examples and Comparative Examples.
본 발명은, 절연층의 하면에 형성되는 제1 감지 패턴과 상면에 형성되는 제2 감지 패턴을 포함하며, 상기 제1 감지 패턴과 제2 감지 패턴은 서로 다른 방향으로 형성되고, 상기 제1 감지 패턴과 제2 감지 패턴을 동일 평면 상에 투사하는 경우 그 간격이 4㎛ 이하임으로써, 전기 전도도, 터치 민감도 및 시인성이 개선된 터치 스크린 패널 및 그 제조 방법에 관한 것이다.The present invention includes a first sensing pattern formed on the lower surface of the insulating layer and a second sensing pattern formed on the upper surface, wherein the first sensing pattern and the second sensing pattern are formed in different directions, and the first sensing When the pattern and the second sensing pattern are projected on the same plane, the distance is 4 μm or less, and the present invention relates to a touch screen panel having improved electrical conductivity, touch sensitivity, and visibility, and a method of manufacturing the same.
이하, 도면을 참조하여 본 발명의 터치 스크린 패널 및 그 제조 방법에 대해 상세히 설명하기로 한다. 그러나 이는 예시적 실시예에 불과하며 본 발명은 이에 제한되지 않는다.Hereinafter, a touch screen panel of the present invention and a manufacturing method thereof will be described in detail with reference to the accompanying drawings. However, this is only an exemplary embodiment and the present invention is not limited thereto.
본 발명을 설명함에 있어서, 본 발명과 관련된 공지기술에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략하기로 한다. 그리고, 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 관례 등에 따라 달라질 수 있다. 그러므로 그 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다.In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or an operator. Therefore, the definition should be made based on the contents throughout the specification.
본 발명의 기술적 사상은 청구범위에 의해 결정되며, 이하 실시예는 진보적인 본 발명의 기술적 사상을 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 효율적으로 설명하기 위한 일 수단일 뿐이다.The technical spirit of the present invention is determined by the claims, and the following embodiments are merely means for efficiently explaining the technical spirit of the present invention to those skilled in the art to which the present invention pertains.
도 3은 본 발명의 일 실시예에 따른 터치 스크린 패널을 나타낸 도면이다.3 is a diagram illustrating a touch screen panel according to an exemplary embodiment of the present invention.
도 3을 참조하면, 터치 스크린 패널(100)은 베이스 부재(102) 상에 형성된, 제1 감지 패턴(104), 절연층(106), 및 제2 감지 패턴(108)을 포함한다.Referring to FIG. 3, the touch screen panel 100 includes a first sensing pattern 104, an insulating layer 106, and a second sensing pattern 108 formed on the base member 102.
베이스 부재(102)는 투명 기판(또는 필름)을 사용할 수 있다. 예를 들어, 베이스 부재(102)로는 유리 기판 또는 플라스틱 기판을 사용할 수 있으나, 이에 한정되는 것은 아니다. 또한, 베이스 부재(102)는 플렉서블(Flexible)한 재질로 이루어질 수도 있다. The base member 102 may use a transparent substrate (or film). For example, the base member 102 may be a glass substrate or a plastic substrate, but is not limited thereto. In addition, the base member 102 may be made of a flexible material.
제1 감지 패턴(104)은 베이스 부재(102) 상에 형성된다. 제1 감지 패턴(104)은 베이스 부재(102) 상에서 복수 개의 행을 이루며 형성되고, 동일한 행에 배치되는 제1 감지 패턴(104)들은 상호 연결되어 형성된다. 제1 감지 패턴(104)은 예를 들어, 다각형 형태로 형성될 수 있다. 다각형의 예시로는, 삼각형, 사각형(마름모, 직사각형, 정사각형), 육각형 등을 들 수 있으나, 제1 감지 패턴(104)의 형상이 이에 한정되는 것은 아니며, 그 이외의 다양한 형상으로 형성될 수 있음은 물론이다. 제1 감지 패턴(104)은 예를 들어, ITO(Indium Tin-Oxide), 메탈 나노 와이어(Metal Nano-Wire), 메탈 메쉬(Metal Mesh), 그라핀(Graphene), 유기 전극 등과 같은 도전성 물질로 이루어질 수 있으며, 투명 전극으로 이루어질 수 있다. 본 발명에 있어서, 투명 전극이란 육안으로 식별되지 않는 전극을 의미하며, 그에 따라 물질 자체는 비투명성이라도 미세한 구조로 인해 육안으로 식별되지 않는 경우도 포함한다.The first sensing pattern 104 is formed on the base member 102. The first sensing patterns 104 are formed in a plurality of rows on the base member 102, and the first sensing patterns 104 disposed in the same row are connected to each other. The first sensing pattern 104 may be formed, for example, in a polygonal shape. Examples of the polygon may include a triangle, a square (a rhombus, a rectangle, a square), a hexagon, and the like, but the shape of the first sensing pattern 104 is not limited thereto, and may be formed in various shapes other than this. Of course. The first sensing pattern 104 may be formed of, for example, a conductive material such as indium tin-oxide (ITO), metal nano-wire, metal mesh, graphene, or organic electrode. It may be made, it may be made of a transparent electrode. In the present invention, the transparent electrode refers to an electrode that is not visually identified, and thus includes a case where the material itself is non-transparent, even if it is not visually identified due to the fine structure.
제1 감지 패턴(104)은 도 3에 도시된 바와 같이, 절연층에 매립되어 그 표면이 절연층과 동일하도록 형성될 수 있으나, 이에 한정되는 것은 아니며, 필요에 따라서는 절연층의 표면에서 돌출되도록 형성될 수도 있다. As illustrated in FIG. 3, the first sensing pattern 104 may be embedded in the insulating layer so that the surface thereof is the same as the insulating layer, but is not limited thereto. If necessary, the first sensing pattern 104 may protrude from the surface of the insulating layer. It may be formed to be.
절연층(106)은 베이스 부재(102) 상에서 제1 감지 패턴(104)을 감싸며 형성된다. 절연층(106)은 베이스 부재(102)를 보호하면서 제1 감지 패턴(104)과 제2 감지 패턴(108)이 전기적으로 절연되도록 하는 역할을 한다. 절연층(106)은 무기 물질 또는 유기 물질로 이루어질 수 있다. 절연층(106)을 무기 물질로 형성하는 경우, SiO2와 같은 무기 물질을 예를 들어, 스퍼터링 방식으로 증착하여 형성할 수 있다. 무기 물질로 절연층(106)을 형성하면, 절연층(106)의 내구성을 일정 수준으로 유지할 수 있게 된다. 절연층(106)을 유기 물질로 형성하는 경우, 광경화 수지와 같은 유기 물질을 도포한 후 경화하여 형성할 수 있다. 유기 물질은 비교적 낮은 온도(예를 들어, 약 220℃)에서 베이킹이 이루어지기 때문에, 베이스 부재(102) 및 절연층(106) 사이에 편광자(미도시)가 형성될 경우 편광자(미도시)에 손상을 주지 않게 된다. 또한, 베이스 부재(102)를 플렉서블한 재질로 형성하는 경우, 절연층(106)은 유기 물질로 형성하는 것이 바람직하다.The insulating layer 106 is formed to surround the first sensing pattern 104 on the base member 102. The insulating layer 106 serves to electrically insulate the first sensing pattern 104 and the second sensing pattern 108 while protecting the base member 102. The insulating layer 106 may be made of an inorganic material or an organic material. When the insulating layer 106 is formed of an inorganic material, an inorganic material such as SiO 2 may be formed by, for example, a sputtering method. When the insulating layer 106 is formed of an inorganic material, the durability of the insulating layer 106 can be maintained at a predetermined level. When the insulating layer 106 is formed of an organic material, it may be formed by applying an organic material such as a photocurable resin and then curing it. Since the organic material is baked at a relatively low temperature (eg, about 220 ° C.), the polarizer (not shown) is formed when a polarizer (not shown) is formed between the base member 102 and the insulating layer 106. Will not damage. In addition, when the base member 102 is formed of a flexible material, the insulating layer 106 is preferably formed of an organic material.
제2 감지 패턴(108)은 절연층(106) 상에 형성된다. 제2 감지 패턴(108)은 절연층(106) 상에서 복수 개의 열을 이루며 형성되고, 동일한 열에 배치되는 제2 감지 패턴(108)들은 상호 연결되어 형성된다. 즉, 제2 감지 패턴(108)은 제1 감지 패턴(104)과 다른 평면 상에 형성되기 때문에, 동일한 열에 배치되는 제2 감지 패턴(108)들끼리 연결될 수 있다. The second sensing pattern 108 is formed on the insulating layer 106. The second sensing patterns 108 are formed in a plurality of rows on the insulating layer 106, and the second sensing patterns 108 arranged in the same columns are connected to each other. That is, since the second sensing pattern 108 is formed on a different plane from the first sensing pattern 104, the second sensing patterns 108 arranged in the same column may be connected to each other.
제2 감지 패턴(108)은 제1 감지 패턴(104)과는 다른 방향(예를 들면 서로 직교하는 방향)으로 형성되며, 그에 따라 제1 감지 패턴(104)와 제2 감지 패턴은(108)은 터치되는 지점의 X 좌표 및 Y 좌표에 대한 정보를 제공하게 된다.The second sensing pattern 108 is formed in a direction different from the first sensing pattern 104 (eg, orthogonal to each other), so that the first sensing pattern 104 and the second sensing pattern 108 are formed in a different direction. Provides information about the X and Y coordinates of the touched point.
제2 감지 패턴(108)은 예를 들어, 다각형 형태로 형성될 수 있다. 다각형의 예시로는, 삼각형, 사각형(마름모, 직사각형, 정사각형), 육각형 등을 들 수 있으나, 제1 감지 패턴(104)의 형상이 이에 한정되는 것은 아니며, 그 이외의 다양한 형상으로 형성될 수 있음은 물론이다. 제2 감지 패턴(108)은 예를 들어, ITO(Indium Tin-Oxide), 메탈 나노 와이어(Metal Nano-Wire), 메탈 메쉬(Metal Mesh), 그라핀(Graphene), 유기 전극 등과 같은 도전성 물질로 이루어질 수 있으며, 투명 전극으로 이루어질 수 있다.The second sensing pattern 108 may be formed in, for example, a polygonal shape. Examples of the polygon may include a triangle, a square (a rhombus, a rectangle, a square), a hexagon, and the like, but the shape of the first sensing pattern 104 is not limited thereto, and may be formed in various shapes other than this. Of course. The second sensing pattern 108 may be formed of, for example, a conductive material such as indium tin oxide (ITO), metal nano-wire, metal mesh, graphene, or organic electrode. It may be made, it may be made of a transparent electrode.
본 발명에 있어서, 제1 감지 패턴(104)과 제2 감지 패턴(108)은 동일 평면 상에 투사되는 경우 그 간격(W)이 4㎛ 이하가 되도록 형성된다. In the present invention, when the first sensing pattern 104 and the second sensing pattern 108 are projected on the same plane, the gap W is formed to be 4 μm or less.
도 1 및 도 2에 도시된 바와 같이, 동일한 평면 상에 제1 감지 패턴(20-1)과 제2 감지 패턴(20-2)이 형성되는 종래의 구조에서는 패턴 간의 간섭 등의 문제로 인해 제1 감지 패턴(20-1)과 제2 감지 패턴(20-2)을 소정 간격 이상 이격되어 형성할 수 밖에 없다.As shown in FIG. 1 and FIG. 2, in the conventional structure in which the first sensing pattern 20-1 and the second sensing pattern 20-2 are formed on the same plane, the first sensing pattern 20-1 and the second sensing pattern 20-2 are formed due to a problem such as interference between the patterns. The first sensing pattern 20-1 and the second sensing pattern 20-2 may be formed to be spaced apart by a predetermined interval or more.
하지만, 본 발명의 터치 스크린 패널은 제1 감지 패턴(104)과 제2 감지 패턴(108)을 서로 다른 평면 상에 형성함으로써, 제1 감지 패턴(104)과 제2 감지 패턴(108)을 그 간격에 무관하게 형성할 수 있다.However, in the touch screen panel of the present invention, the first sensing pattern 104 and the second sensing pattern 108 are formed by forming the first sensing pattern 104 and the second sensing pattern 108 on different planes. It can be formed regardless of the spacing.
또한, 본 발명은 제1 감지 패턴(104)과 제2 감지 패턴(108)이 동일 평면 상에 투사되는 경우 그 간격이 4㎛ 이하가 되는 경우에는 제1 감지 패턴(104)과 제2 감지 패턴(108) 간에 발생하는 커패시턴스(Capacitance)가 현저하게 상승되어 터치 민감도가 향상하는 것에 착안하여 안출된 것이다.In addition, in the present invention, when the first sensing pattern 104 and the second sensing pattern 108 are projected on the same plane, when the distance becomes 4 μm or less, the first sensing pattern 104 and the second sensing pattern are present. The capacitance that occurs between the 108 and the capacitance (Capacitance) is significantly increased to focus on improving the touch sensitivity.
구체적으로, 터치의 민감도는 터치 시에 제1 감지 패턴(104)과 제2 감지 패턴(108) 간에 발생하는 상호 커패시턴스(Mutual Capacitance, Cm)로 나타낼 수 있다. ΔCm은 터치 하기 전과 터치 한 후의 Cm의 변화를 나타낸다.In detail, the sensitivity of the touch may be expressed as mutual capacitance (Cm) generated between the first sensing pattern 104 and the second sensing pattern 108 when the touch is performed. ΔCm represents the change in Cm before and after touching.
제1 감지 패턴(104)과 제2 감지 패턴(108) 간에 발생하는 상호 커패시턴스(Cm)는 하기 수학식 1로 표시된다.The mutual capacitance Cm occurring between the first sensing pattern 104 and the second sensing pattern 108 is represented by Equation 1 below.
수학식 1
Figure PCTKR2014004656-appb-M000001
 Equation 1
Figure PCTKR2014004656-appb-M000001
(식 중, ε는 유전율, A는 단면적, d는 패턴 간 거리)로 나타낼 수 있는데, 제1 감지 패턴(104)과 제2 감지 패턴(108)을 가깝게 형성함에 따라 d가 작아져 Cm값이 커지게 된다. Where ε is the dielectric constant, A is the cross-sectional area, and d is the distance between the patterns. As the first sensing pattern 104 and the second sensing pattern 108 are formed close to d, the d becomes smaller and the Cm value is increased. It becomes bigger.
ΔCm은 터치 하기 전(base Cm)과 터치 한 후(touch Cm)의 Cm의 변화를 나타내므로, ΔCm값이 크다는 것은, 터치 하기 전과 터치 한 후의 신호 차이가 크다는 것이며, 터치 민감도가 우수하다는 것을 나타낸다.Since ΔCm represents a change in the Cm before and after the touch (base Cm) and after the touch (touch Cm), a large value of ΔCm means that the signal difference between the touch and the touch is large and the touch sensitivity is excellent. .
또한, base Cm이 커지면 신호 대 잡음비(Signal to Noise Ratio)가 커져 터치 민감도가 개선되게 된다. 즉, 터치 스크린 패널에서 신호 대 잡음비는 Cm과 Ccell의 비율로 나타낼 수 있다. Ccell은 제1 감지 패턴(104) 및 제2 감지 패턴(108) 이외의 셀 전극(예를 들어, LCD 전극이나 OLED 전극 등)에서 발생하는 커패시턴스를 말한다. Ccell은 터치 스크린에서는 원하지 않는 커패시턴스로서 일종의 노이즈(Noise)로 작용하게 된다. 그런데, 제1 감지 패턴(104)과 제2 감지 패턴(108)을 4㎛ 이하로 형성하는 경우, 그렇지 않은 경우에 비하여 base Cm값이 크게 증가하므로 신호 대 잡음비가 커져 터치 민감도가 개선되게 된다. In addition, as the base Cm increases, signal to noise ratio increases, thereby improving touch sensitivity. That is, the signal-to-noise ratio in the touch screen panel may be represented by the ratio of Cm and C cell . C cell refers to capacitance generated in cell electrodes other than the first sensing pattern 104 and the second sensing pattern 108 (for example, an LCD electrode or an OLED electrode). C cell acts as a kind of noise as unwanted capacitance in the touch screen. However, when the first sensing pattern 104 and the second sensing pattern 108 are formed to be 4 μm or less, the base Cm value is greatly increased compared to the case where the first sensing pattern 104 and the second sensing pattern 108 are smaller than 4 μm, thereby improving the touch sensitivity.
본 발명에 있어서, 본 발명의 간격 범위 이내라면 간격이 가까울수록 base Cm이 증가하므로 그러한 추세가 유지되는 범위 내에서 간격의 하한은 특별히 한정하지 않는다. 예를 들면 간격은 0(zero)일 수도 있다. In the present invention, since the base Cm increases as the distance is closer as long as it is within the interval range of the present invention, the lower limit of the interval is not particularly limited within the range where such a trend is maintained. For example, the interval may be zero.
본 발명의 다른 일 실시예로서, 상기 간격(W)이 음의 값을 갖는 경우(제1 감지 패턴과 제2 감지 패턴을 동일 평면에 투사하였을 때 겹치는 경우)도 본 발명의 범위에 포함한다. 이와 관련하여, 도 4에는 제1 감지 패턴과 제2 감지 패턴 간의 간격 변화가 개략적으로 나타나 있으며, 도 5에는 간격이 음의 값을 갖는 경우의 본 발명의 다른 일 실시예가 개략적으로 도시되어 있다.As another embodiment of the present invention, a case in which the interval W has a negative value (when the first sensing pattern and the second sensing pattern overlap when projected on the same plane) is also included in the scope of the present invention. In this regard, FIG. 4 schematically illustrates a change in interval between the first sensing pattern and the second sensing pattern, and FIG. 5 schematically illustrates another embodiment of the present invention when the interval has a negative value.
제1 감지 패턴과 제2 감지 패턴이 겹치는 경우(간격이 음의 값을 갖는 경우)에는 Cm뿐만 아니라 ΔCm도 현저하게 증가하여 터치의 민감도가 더욱 대폭적으로 상승하게 된다.When the first sensing pattern and the second sensing pattern overlap each other (when the interval has a negative value), not only Cm but also ΔCm is significantly increased, so that the sensitivity of the touch is further increased.
제1 감지 패턴과 제2 감지 패턴이 겹치는 경우, 겹치는 영역의 면적은 특별히 한정하지는 않으나, 예를 들면 제1 감지 패턴(104) 또는 제2 감지 패턴(108)의 전체 면적을 기준으로 50 % 이하가 되도록 할 수 있다.When the first sensing pattern and the second sensing pattern overlap, the area of the overlapping area is not particularly limited, but, for example, 50% or less based on the total area of the first sensing pattern 104 or the second sensing pattern 108. Can be
또한, 본 발명의 감지 패턴은 상기 범위의 간격을 가짐으로써, 시인성을 현저하게 개선시킬 수 있다. 감지 패턴은 패턴부와 비패턴부의 반사율 차이에 의해서 육안으로 식별이 되는데, 패턴이 육안으로 식별되면 시인성이 저하된다. 이에 본 발명은 패턴 간의 간격을 4㎛ 이하가 되면, 비패턴부의 면적은 현저하게 좁게되어 육안으로 식별할 수 없을 정도가 되는 것에 착안하여 안출된 것이다. 이러한 측면에서, 패턴 간의 간격 4㎛ 이하, 바람직하게는 3㎛ 이하일 수 있다. 패턴 간의 간격이 좁을수록 비패턴부가 식별이 안되므로 간격의 하한은 특별히 한정되지 않는다.In addition, the sensing pattern of the present invention can significantly improve visibility by having the interval within the above range. The detection pattern is visually identified by the difference in reflectance between the pattern portion and the non-pattern portion. When the pattern is visually identified, visibility is reduced. Accordingly, the present invention has been conceived in light of the fact that when the spacing between patterns is 4 占 퐉 or less, the area of the non-pattern portion is significantly narrowed and becomes indistinguishable to the naked eye. In this respect, the spacing between patterns may be 4 μm or less, preferably 3 μm or less. As the spacing between patterns becomes smaller, the non-pattern part cannot be identified, so the lower limit of the spacing is not particularly limited.
제2 감지 패턴(108)은 도 3에 도시된 바와 같이, 절연층의 표면에서 돌출되도록 형성될 수도 있으나, 필요에 따라서는 절연층에 매립되어 그 표면이 절연층과 동일하도록 형성될 수도 있다.As illustrated in FIG. 3, the second sensing pattern 108 may be formed to protrude from the surface of the insulating layer. However, if necessary, the second sensing pattern 108 may be embedded in the insulating layer to have the same surface as the insulating layer.
또한, 본 발명은 터치 스크린 패널의 제조 방법을 제공한다.The present invention also provides a method of manufacturing a touch screen panel.
도 6은 본 발명의 일 실시예에 따른 터치 스크린 패널의 제조 방법을 나타낸 도면이다.6 illustrates a method of manufacturing a touch screen panel according to an exemplary embodiment of the present invention.
도 6을 참조하면, 베이스 부재(102) 상에 제1 감지 패턴(104)을 형성한다(도 6의 (a)). 여기서, 제1 감지 패턴(104)은 예를 들어, 바람직하게는 스크린 인쇄법으로 형성할 수 있다. 이 경우, 제1 감지 패턴(104)은, 메탈 나노 와이어 또는 메탈 메쉬로 이루어질 수 있다. 그러나, 이에 한정되는 것은 아니며 제1 감지 패턴(104)은 스퍼터링 방식 또는 포토리소그래피(Photolithography) 방식이나 그 이외의 다양한 방식으로 형성할 수 있다. 또한, 도전성 물질도 ITO(Indium Tin-Oxide), 그라핀(Graphene), 유기 전극 등 당분야에 알려진 물질이 제한 없이 사용될 수 있다.Referring to FIG. 6, the first sensing pattern 104 is formed on the base member 102 (FIG. 6A). Here, the first sensing pattern 104 may be formed, for example, by screen printing. In this case, the first sensing pattern 104 may be made of a metal nanowire or a metal mesh. However, the present invention is not limited thereto, and the first sensing pattern 104 may be formed by a sputtering method, a photolithography method, or various other methods. In addition, a conductive material may be used without limitation, materials known in the art, such as indium tin-oxide (ITO), graphene, and organic electrodes.
다음으로, 베이스 부재(102)의 상부에 제1 감지 패턴(104) 상에 절연층(106)을 형성한다(도 6의 (b)). 절연층(106)은 무기 물질을 증착하여 형성하거나 유기 물질을 코팅하여 형성할 수 있다. Next, an insulating layer 106 is formed on the first sensing pattern 104 on the base member 102 (FIG. 6B). The insulating layer 106 may be formed by depositing an inorganic material or by coating an organic material.
다음으로, 절연층(106) 상에 제2 감지 패턴(108)을 형성한다(도 4의 (c)). 이때, 제2 감지 패턴(108)은 제1 감지 패턴(104)과 동일 평면에 투사되었을 때 간격이 4㎛ 이하가 되도록 형성할 수 있다. 제2 감지 패턴(108)은 예를 들어, 바람직하게는 스크린 인쇄법으로 형성할 수 있다. 이 경우, 제2 감지 패턴(108)은 메탈 나노 와이어 또는 메탈 메쉬로 이루어질 수 있다. 그러나, 이에 한정되는 것은 아니며 제2 감지 패턴(108)은 스퍼터링 방식 또는 포토리소그래피 방식이나 그 이외의 다양한 방식으로 형성할 수 있다. 또한, 도전성 물질도 ITO(Indium Tin-Oxide), 그라핀(Graphene), 유기 전극 등 당분야에 알려진 물질이 제한 없이 사용될 수 있다.Next, a second sensing pattern 108 is formed on the insulating layer 106 (FIG. 4C). In this case, the second sensing pattern 108 may be formed to have a spacing of 4 μm or less when projected onto the same plane as the first sensing pattern 104. The second sensing pattern 108 may be formed, for example, by screen printing. In this case, the second sensing pattern 108 may be made of a metal nanowire or a metal mesh. However, the present invention is not limited thereto, and the second sensing pattern 108 may be formed by a sputtering method, a photolithography method, or various other methods. In addition, a conductive material may be used without limitation, materials known in the art, such as indium tin-oxide (ITO), graphene, and organic electrodes.
본 발명의 실시예에 의하면, 제1 감지 패턴(104)과 제2 감지 패턴(108)을 서로 다른 평면에 형성함으로써, 브릿지 패턴 및 컨택트 홀이 없이도 동일한 열의 제2 감지 패턴(108)을 상호 연결하여 형성할 수 있게 된다. 이 경우, 컨택트 홀을 형성하기 위한 포토리소그래피 공정을 수행하지 않아도 되며 단순히 적층식 공정만 수행하면 되므로, 제조 공정을 단순화 할 수 있고 제조 시간 및 비용을 줄일 수 있게 된다. 그리고, 컨택트 홀의 높은 접촉 저항에 따른 전기 전도도 저하 현상이 없으므로, 전기 전도도를 개선할 수 있게 된다. According to an embodiment of the present invention, the first sensing pattern 104 and the second sensing pattern 108 are formed on different planes, thereby interconnecting the second sensing patterns 108 in the same row without the bridge pattern and the contact hole. Can be formed. In this case, it is not necessary to perform the photolithography process for forming the contact hole, and only a lamination process may be performed, thereby simplifying the manufacturing process and reducing manufacturing time and cost. In addition, since there is no phenomenon of lowering the electrical conductivity due to the high contact resistance of the contact hole, the electrical conductivity can be improved.
또한, 제1 감지 패턴(104)과 제2 감지 패턴(108)이 서로 다른 평면에 형성되기 때문에, 제1 감지 패턴(104) 및 제2 감지 패턴(108)을 스크린 인쇄법으로도 형성할 수 있으며 그로 인해 터치 스크린 패널(100)을 대면적으로 형성할 수 있게 된다. 또한, 제1 감지 패턴(104)과 제2 감지 패턴(108)을 간격이 4㎛ 이하가 되도록 형성함으로써, 터치 민감도를 향상시킬 수 있게 된다. In addition, since the first sensing pattern 104 and the second sensing pattern 108 are formed on different planes, the first sensing pattern 104 and the second sensing pattern 108 may be formed by screen printing. As a result, the touch screen panel 100 can be formed in a large area. In addition, by forming the first sensing pattern 104 and the second sensing pattern 108 to be 4㎛ or less, it is possible to improve the touch sensitivity.
본 발명의 다른 일 실시예로서, 도 7에는 제1 감지 패턴과 제2 감지 패턴은 동일 평면 상에 투사되었을 때 겹치게 되도록 형성되도록(간격(W)가 음의 값을 갖도록) 하는 제조방법이 도시되어 있다. As another embodiment of the present invention, FIG. 7 shows a manufacturing method in which the first sensing pattern and the second sensing pattern are formed to overlap when projected on the same plane (the interval W has a negative value). It is.
도 7에 따른 제조방법은 간격(W)가 음의 값을 갖도록 하는 것을 제외하고는 도 6을 참고하여 설명한 상기 제조방법과 동일한 범주 내에서 수행될 수 있다.The manufacturing method according to FIG. 7 may be performed in the same category as the manufacturing method described with reference to FIG. 6 except that the interval W has a negative value.
이하, 본 발명의 이해를 돕기 위하여 바람직한 실시예를 제시하나, 이들 실시예는 본 발명을 예시하는 것일 뿐 첨부된 특허청구범위를 제한하는 것이 아니며, 본 발명의 범주 및 기술사상 범위 내에서 실시예에 대한 다양한 변경 및 수정이 가능함은 당업자에게 있어서 명백한 것이며, 이러한 변형 및 수정이 첨부된 특허청구범위에 속하는 것도 당연한 것이다. Hereinafter, preferred examples are provided to aid the understanding of the present invention, but these examples are merely illustrative of the present invention and are not intended to limit the scope of the appended claims, which are within the scope and spirit of the present invention. It is apparent to those skilled in the art that various changes and modifications can be made to the present invention, and such modifications and changes belong to the appended claims.
실시예 1-4및 비교예 1-3Examples 1-4 and Comparative Examples 1-3
PES 고분자 기판 상에 ITO를 스퍼터링하여 마름모 형태의 제1 감지 패턴을 형성하였으며, 그 위에 유기 절연막을 코팅하고, 그 위에 다시 ITO를 스퍼터링하여 마름모 형태의 제2 감지 패턴을 형성하였다.ITO was sputtered on the PES polymer substrate to form a rhombus-shaped first sensing pattern, and an organic insulating film was coated thereon, and ITO was again sputtered on the second sensing pattern in the form of rhombus.
이 때, 제1 감지 패턴과 제2 감지 패턴을 동일 평면 상에 투사했을 때 형성되는 간격은 하기 표 1과 같이 하여 제조하였다.In this case, an interval formed when the first sensing pattern and the second sensing pattern were projected on the same plane was prepared as in Table 1 below.
또한, 제조된 전극 적층체의 Cm 및 ΔCm을 측정하였으며, 패턴을 육안으로 식별할 수 있는지 여부도 확인하여, 그 결과를 하기 표 1 및 도 8에 나타내었다.In addition, Cm and ΔCm of the prepared electrode laminate were measured, and it was also confirmed whether the pattern could be visually identified, and the results are shown in Table 1 and FIG. 8.
표 1
Figure PCTKR2014004656-appb-T000001
 Table 1
Figure PCTKR2014004656-appb-T000001
표 1 및 도 8을 참고하면, 제1 감지 패턴과 제2 감지 패턴 간의 간격이 4㎛ 초과인 비교예들에 비해, 제1 감지 패턴과 제2 감지 패턴 간의 간격이 4㎛ 이하에서부터 Cm이 상승하여, 터치 민감도가 개선됨을 확인할 수 있다.Referring to Table 1 and FIG. 8, compared to the comparative examples in which the interval between the first sensing pattern and the second sensing pattern is greater than 4 μm, the distance between the first sensing pattern and the second sensing pattern is increased from 4 μm or less and Cm is increased. As a result, the touch sensitivity may be improved.
또한, 간격이 0 이하인 경우에는 Cm 뿐만 아니라 ΔCm 값도 급격하게 커지는 것을 확인할 수 있는 바, 터치 민감도가 더욱 현저하게 상승하는 것을 확인할 수 있다.In addition, when the interval is 0 or less, it can be seen that not only the Cm but also the ΔCm values increase rapidly, and thus the touch sensitivity increases more remarkably.
한편, 패턴 간의 간격이 4㎛ 이하인 실시예들의 경우에는 전극 간의 간격이 육안으로 시인가능한 범위보다 좁아 감지 패턴의 식별이 거의 불가능하였다.On the other hand, in embodiments where the spacing between the patterns is 4 µm or less, the spacing between the electrodes is narrower than the visually visible range, making it almost impossible to identify the sensing pattern.
[부호의 설명][Description of the code]
100 : 터치 스크린 패널100: touch screen panel
102 : 베이스 부재 104 : 제1 감지 패턴102 base member 104 first sensing pattern
106 : 절연층 108 : 제2 감지 패턴106: insulating layer 108: second sensing pattern

Claims (9)

  1. 절연층의 하면에 형성되는 제1 감지 패턴과 상면에 형성되는 제2 감지 패턴을 포함하며, 상기 제1 감지 패턴과 제2 감지 패턴은 서로 다른 방향으로 형성되고, 상기 제1 감지 패턴과 제2 감지 패턴을 동일 평면 상에 투사하는 경우 그 간격이 4㎛ 이하인, 터치 스크린 패널.And a first sensing pattern formed on the bottom surface of the insulating layer and a second sensing pattern formed on the upper surface, wherein the first sensing pattern and the second sensing pattern are formed in different directions, and the first sensing pattern and the second sensing pattern are formed in different directions. The touch screen panel having a spacing of 4 μm or less when projecting a sensing pattern on the same plane.
  2. 청구항 1에 있어서, 상기 제1 감지 패턴과 제2 감지 패턴은 서로 독립적으로 다각형 형태의 패턴이 연결된 형태이고, 상기 간격은 동일 평면 상에 투사된 제1 감지 패턴과 제2 감지 패턴의 다각형 간의 간격인, 터치 스크린 패널.The method of claim 1, wherein the first sensing pattern and the second sensing pattern is a form in which a polygonal pattern is connected to each other independently, the interval is the interval between the polygon of the first sensing pattern and the second sensing pattern projected on the same plane , Touch screen panel.
  3. 청구항 1에 있어서, 상기 제1 감지 패턴과 상기 제2 감지 패턴은 서로 독립적으로 절연층에 매립되어 그 표면이 절연층과 동일하도록 형성되거나 절연층의 일면에서 돌출되도록 형성되는, 터치 스크린 패널.The touch screen panel as set forth in claim 1, wherein the first sensing pattern and the second sensing pattern are embedded in an insulating layer independently of each other, and the surface thereof is formed to be the same as the insulating layer or protrude from one surface of the insulating layer.
  4. 청구항 1에 있어서, 동일 평면 상에 투사된 제1 감지 패턴과 제2 감지 패턴이 겹치게 되는, 터치 스크린 패널.The touch screen panel of claim 1, wherein the first sensing pattern and the second sensing pattern projected on the same plane overlap.
  5. 베이스 부재의 상부면에 제1 감지 패턴을 형성하는 단계;Forming a first sensing pattern on an upper surface of the base member;
    상기 베이스 부재의 상부에서 상기 제1 감지 패턴 상에 절연층을 형성하는 단계; 및Forming an insulating layer on the first sensing pattern on the base member; And
    상기 제1 감지 패턴과 동일 평면에 투사되었을 때 간격이 4㎛ 이하가 되도록 상기 절연층의 상면에 제2 감지 패턴을 형성하는 단계를 포함하는, 터치 스크린 패널의 제조방법.And forming a second sensing pattern on an upper surface of the insulating layer so that the interval is 4 μm or less when projected onto the same plane as the first sensing pattern.
  6. 청구항 5에 있어서, 상기 제1 감지 패턴을 형성하는 단계는, 상기 베이스 부재의 상부면에 도전성 물질로 스퍼터링, 포토리소그래피, 스크린 인쇄 중 적어도 하나를 이용하여 형성하는, 터치 스크린 패널의 제조 방법.The method of claim 5, wherein the forming of the first sensing pattern comprises forming at least one of sputtering, photolithography, and screen printing with a conductive material on the upper surface of the base member.
  7. 청구항 5에 있어서, 상기 제2 감지 패턴을 형성하는 단계는, 상기 절연층의 상부면에 도전성 물질로 스퍼터링, 포토리소그래피, 스크린 인쇄 중 적어도 하나를 이용하여 형성하는, 터치 스크린 패널의 제조 방법.The method of claim 5, wherein the forming of the second sensing pattern is performed by using at least one of sputtering, photolithography, and screen printing with a conductive material on an upper surface of the insulating layer.
  8. 청구항 5에 있어서, 상기 제1 감지 패턴과 제2 감지 패턴은 동일 평면 상에 투사되었을 때 겹치게 되도록 형성되는, 터치 스크린 패널의 제조 방법.The method of claim 5, wherein the first sensing pattern and the second sensing pattern are formed to overlap when projected on the same plane.
  9. 청구항 5에 있어서, 상기 베이스 부재는 플라스틱 기판 또는 유리 기판인, 터치 스크린 패널의 제조 방법.The method of claim 5, wherein the base member is a plastic substrate or a glass substrate.
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