KR101478043B1 - Touch panel and method for manufacturing the same - Google Patents

Touch panel and method for manufacturing the same Download PDF

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Publication number
KR101478043B1
KR101478043B1 KR20130045666A KR20130045666A KR101478043B1 KR 101478043 B1 KR101478043 B1 KR 101478043B1 KR 20130045666 A KR20130045666 A KR 20130045666A KR 20130045666 A KR20130045666 A KR 20130045666A KR 101478043 B1 KR101478043 B1 KR 101478043B1
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KR
South Korea
Prior art keywords
transparent electrode
wiring pattern
pattern
insulating layer
electrode pattern
Prior art date
Application number
KR20130045666A
Other languages
Korean (ko)
Other versions
KR20140127450A (en
Inventor
성연조
김기환
박현진
황지은
Original Assignee
일진디스플레이(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 일진디스플레이(주) filed Critical 일진디스플레이(주)
Priority to KR20130045666A priority Critical patent/KR101478043B1/en
Publication of KR20140127450A publication Critical patent/KR20140127450A/en
Application granted granted Critical
Publication of KR101478043B1 publication Critical patent/KR101478043B1/en

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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Abstract

The touch panel includes a transparent electrode pattern, a wiring pattern arranged in a state of overlapping with a part of the outer side of the transparent electrode pattern in the vertical direction, and a wiring pattern arranged between the transparent electrode pattern and the wiring pattern, And an insulating layer having a via hole for electrical contact. The insulating layer is formed of an opaque material. Since the insulating layer formed between the transparent electrode pattern of the touch panel and the wiring pattern is formed of an opaque material, whether or not the material forming the wiring pattern is sufficiently filled in the via-hole of the insulating layer is visually observed from the back surface of the substrate of the touch panel Can be easily observed.

Description

[0001] The present invention relates to a touch panel and a manufacturing method thereof,

The present invention relates to a touch panel and a manufacturing method thereof.

As an input element of a display device, a touch panel which is an input device for recognizing a touch point of a user is widely used.

Various types of touch panels such as a resistive touch panel and a capacitive touch panel are known. Recently, capacitive touch panels having advantages of multi-touch recognition and excellent durability have been widely used.

The touch panel includes a transparent electrode pattern formed in the viewing area and a wiring pattern formed outside the transparent electrode pattern. The transparent electrode pattern is a portion for sensing a change in capacitance due to a touch, and the wiring pattern is connected to a transparent electrode pattern and connected to an external circuit.

In a conventional single layer multi-touch touch panel, a transparent electrode pattern of a single layer formed in the viewing area is selectively connected to the wiring pattern at its outer end. A method of forming an electrically insulating layer in which a via hole is formed between the transparent electrode pattern and the wiring pattern and electrically connecting the transparent electrode pattern and the wiring pattern through the via hole in order to connect the transparent electrode pattern and the wiring pattern, Is known. Specifically, after a transparent electrode pattern is formed on a substrate, an insulating layer having a via hole is formed thereon, and then a material forming a wiring pattern is impregnated into the via hole to form a wiring pattern.

In the case of the method of electrically connecting the transparent electrode pattern and the wiring pattern by using the insulating layer having the via hole as described above, since the contact is made through the via hole having the narrow and the stepped via-hole of the insulating layer, There is a problem of reliability in the filling of the via-holes in the material forming the electrode and there is a possibility of cracking.

Conventionally, an insulating layer having a via hole is formed of a transparent or semitransparent material by a structure for forming an insulating layer in the visual field for the convenience of manufacturing. In the case where the insulating layer is formed of a transparent or translucent material, since the transparent electrode pattern and the transparent insulating layer are sequentially formed on the transparent substrate and the via hole of the insulating layer is filled with the wiring pattern material, It is difficult to observe whether the via hole is completely filled. Accordingly, it is difficult to inspect the problem of the touch panel, which may be caused by insufficient filling of the wiring pattern material.

Korean Patent Publication No. 10-2012-0008153

SUMMARY OF THE INVENTION It is an object of the present invention to provide a touch panel in which the material forming the wiring pattern can be easily observed through the back surface of the substrate in the via hole of the insulating layer and a method of manufacturing the same.

A touch panel according to an exemplary embodiment of the present invention includes a transparent electrode pattern, a wiring pattern arranged in a state of overlapping with a part of the transparent electrode pattern in an up-and-down direction, and a transparent pattern disposed between the transparent electrode pattern and the wiring pattern, And an insulating layer having a via hole for electrical contact between the electrode pattern and the wiring pattern. The insulating layer is formed of an opaque material.

The transparent electrode pattern may be formed on the substrate, the insulating layer and the wiring pattern may be sequentially stacked on the transparent electrode pattern, the material forming the wiring pattern may be filled in the via hole, And the wiring pattern may be electrically connected.

The opaque material forming the insulating layer may have a hue.

A method of manufacturing a touch panel according to an embodiment of the present invention includes the steps of forming a transparent electrode pattern, forming a wiring pattern arranged in a state of overlapping with a part of an outer side of the transparent electrode pattern in a vertical direction, And forming an insulating layer disposed between the wiring pattern and the via hole for electrical contact between the transparent electrode pattern and the wiring pattern. The insulating layer is formed of an opaque material.

According to the present invention, since the insulating layer formed between the transparent electrode pattern and the wiring pattern of the touch panel is formed of an opaque material, whether or not the material forming the wiring pattern is sufficiently filled in the via- It can be easily observed with the naked eye from the back surface.

1 is a plan view of a touch panel according to an embodiment of the present invention.
2 is a cross-sectional view taken along the line II-II in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, a touch panel 100 according to an embodiment of the present invention includes a substrate 110. The substrate 100 may be formed of a glass or a transparent polymer and may be a film made of a material such as PET (polyethylene terephthalate), PC (Polycarbonate), COP (cycloolefin polymer), or the like.

The wiring pattern 120 and the transparent electrode pattern 130 are formed. The transparent electrode pattern 130 is formed to extend to the viewing area VA and a part of the outer side of the viewing area VA of the touch panel 100 and the wiring pattern 120 is formed outside the viewing area VA. The transparent electrode pattern 130 and the wiring pattern 120 are formed outside the viewing area VA in a state of being stacked in the vertical direction. At this time, an insulating layer 140 is formed between the wiring pattern 120 and the transparent electrode pattern 130. The insulating layer 140 is formed of an electrically insulating material.

Referring to FIG. 2, a via hole 141 is formed in the insulating layer 140. In the insulating layer 140, the transparent electrode pattern 130 and the wiring pattern 120 are separated from each other in a portion where the via hole 141 is not formed, so that they are electrically insulated from each other. In the portion where the via hole 141 is present, The transparent electrode pattern 130 and the wiring pattern 120 are selectively electrically connected to each other by the contact 121 filled in the wiring pattern 120. [

A transparent electrode pattern 130 is formed on the substrate 110. For example, the transparent electrode pattern 130 may be formed of a transparent conductive material such as ITO, IZO, silver nano wire, CNT, graphene, metal mesh, Layer structure in which a change in capacitance is detected.

The insulating layer 140 may be formed on the portion of the transparent electrode pattern 130 located outside the viewing area VA. The insulating layer 140 may be formed of an electrically insulating material and may be formed of a material having electrical insulation and adhesiveness so that the wiring pattern 120 may be adhered to the transparent electrode pattern 130. For example, the insulating layer 140 may be formed of a conventionally known insulating paste. The insulating layer 140 includes a via hole 141 at a necessary position so that the transparent electrode pattern 130 and the wiring pattern 120 can be selectively electrically connected.

At this time, the insulating layer 140 may be formed of an opaque material. Furthermore, the insulating layer 140 may be formed of a colored material having a color. For example, by adding a dye to a conventional transparent insulating paste, an opaque and colored insulating paste can be obtained and the insulating layer 140 can be formed using the insulating paste.

The wiring pattern 120 is formed on the insulating layer 140. The wiring pattern 120 may be formed of a metal material having good electrical conductivity, and may be formed of, for example, silver. In the process of forming the wiring pattern 120, the material forming the wiring pattern 120 is filled in the via hole 141 of the insulating layer 140 to form the contact 121, (130) are electrically connected.

Since the insulating layer 140 is formed of an opaque material, the via pattern 141 is formed in the via hole 141 surrounded by the opaque portion when viewed from the back side of the transparent substrate 110 (that is, viewed from bottom to top in FIG. 2) 120 can easily be observed with ease. Thus, the electrical contact defect through the via hole 141 can be visually observed easily. Further, when the insulating layer 140 is formed of a colored material, the contact defect can be observed more clearly.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, .

100: Touch panel
VA: field of view
110: substrate
120: wiring pattern
121: Contact
130: transparent electrode pattern
140: insulating layer
141: via hole

Claims (6)

  1. A transparent electrode pattern formed on a transparent substrate;
    A wiring pattern arranged in a state of overlapping with a part of an outer side of the transparent electrode pattern in a vertical direction; And
    And a via hole provided between the transparent electrode pattern and the wiring pattern for electrical contact between the transparent electrode pattern and the wiring pattern, wherein the transparent electrode pattern and the wiring pattern are spaced apart from each other at a portion where the via hole is not present, And an insulating layer which is electrically insulated,
    A material for forming the wiring pattern is filled in the via hole to electrically connect the transparent electrode pattern and the wiring pattern,
    Wherein the insulating layer is formed of an opaque colored material so as to visually identify the degree of filling of the filling material forming the wiring pattern in the via hole when viewed from the opposite surface of the substrate with the transparent electrode formed thereon.
  2. delete
  3. delete
  4. Forming a transparent electrode pattern on a transparent substrate,
    Forming a wiring pattern arranged in a state of overlapping with a part of an outer side of the transparent electrode pattern in the vertical direction, and
    And a via hole disposed between the transparent electrode pattern and the wiring pattern for electrical contact between the transparent electrode pattern and the wiring pattern, wherein the transparent electrode pattern and the wiring pattern are spaced apart from each other at portions where the via holes are not provided, And forming an insulating layer on the insulating layer,
    A material for forming the wiring pattern is filled in the via hole to electrically connect the transparent electrode pattern and the wiring pattern,
    Wherein the insulating layer is formed of an opaque colored material so as to visually identify the degree of filling of the filling material forming the wiring pattern in the via hole when viewed from the opposite side of the surface of the substrate on which the transparent electrode is formed, .
  5. delete
  6. delete
KR20130045666A 2013-04-24 2013-04-24 Touch panel and method for manufacturing the same KR101478043B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20130045666A KR101478043B1 (en) 2013-04-24 2013-04-24 Touch panel and method for manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20130045666A KR101478043B1 (en) 2013-04-24 2013-04-24 Touch panel and method for manufacturing the same

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KR20140127450A KR20140127450A (en) 2014-11-04
KR101478043B1 true KR101478043B1 (en) 2015-01-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10379641B2 (en) 2016-07-12 2019-08-13 Samsung Display Co., Ltd. Touch screen apparatus having additional sensing electrode located in non-active area

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108845723B (en) * 2018-07-19 2020-10-13 武汉华星光电半导体显示技术有限公司 Touch panel and touch display panel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090111783A (en) * 2008-04-22 2009-10-27 가부시키가이샤 히타치 디스프레이즈 Display device with touch panel
KR20110120046A (en) * 2010-04-28 2011-11-03 삼성모바일디스플레이주식회사 Touch screen panel and display device having the same
KR20120012005A (en) * 2010-07-30 2012-02-09 일진디스플레이(주) Electrode line structure and Capacitive touch sensor for using the same
KR20120075989A (en) * 2010-12-29 2012-07-09 하이디스 테크놀로지 주식회사 Capacitance touch panel and the method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090111783A (en) * 2008-04-22 2009-10-27 가부시키가이샤 히타치 디스프레이즈 Display device with touch panel
KR20110120046A (en) * 2010-04-28 2011-11-03 삼성모바일디스플레이주식회사 Touch screen panel and display device having the same
KR20120012005A (en) * 2010-07-30 2012-02-09 일진디스플레이(주) Electrode line structure and Capacitive touch sensor for using the same
KR20120075989A (en) * 2010-12-29 2012-07-09 하이디스 테크놀로지 주식회사 Capacitance touch panel and the method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10379641B2 (en) 2016-07-12 2019-08-13 Samsung Display Co., Ltd. Touch screen apparatus having additional sensing electrode located in non-active area

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