KR20120032962A - Touch window and manufacturing mathod - Google Patents

Abstract

PURPOSE: A touch window and a manufacturing method thereof are provided to make an electronic device be slim by reducing the thickness of a touch window. CONSTITUTION: A first touch sensing unit is formed on one side of a window substrate(10). The first touch sensing unit includes a first touch electrode pattern and a first electrode wiring. A second sensing unit is formed on one side of a first substrate(20). The second sensing unit includes a second touch electrode pattern and a second electrode wiring. A bonding layer(30) is formed between the window substrate and the first substrate.

Description

Touch Window and Manufacturing Method {Touch Window And Manufacturing Mathod}

The present invention relates to a touch window and a method of manufacturing the same, and more particularly, a touch panel manufactured by bonding one electrode pattern and electrode wiring selected from X-axis and Y-axis electrode patterns on the window substrate and the first substrate, respectively, and then bonding them together. It is possible to realize slim electronic devices by reducing the thickness with windows, and it is possible to increase the efficiency of the process by shortening the process and improving the yield since it is not necessary to form a fine pattern when forming an electrode pattern. A touch window excellent in the sensitivity of a function and a manufacturing method thereof are provided.

In particular, the present invention can be applied not only to small electronic devices such as mobile phones and PDAs of touch screen input methods, but also to large electronic devices among notebook computers and TVs.

The touch screen is actively applied to all display devices due to its convenience as an input means for inputting predetermined information corresponding to the display by pressing the display displayed on the panel.

In general, the touch screen extracts coordinates of a portion pressed on the touch panel by capacitive type, resistive film type, surface ultrasonic type, infrared type, and inputs information.

Conventional resistive touch screens are provided with insulating spacers at regular intervals so that the two surfaces of the transparent conductive film-coated panel do not touch each other. This causes a voltage drop due to the resistance value. It is a method of recognizing the pressed position from the degree of change of the voltage.

In the capacitive touch screen, two substrates, such as PET film or glass, patterned by etching the transparent conductive film, are stacked in the vertical direction in the vertical direction and the left and right crosswise directions. It is a method of recognizing a change in capacitance value by contacting or pressing with a finger or a conductive rod with a laminated structure by inserting an adhesive.

Therefore, in general, a capacitive touch screen is a two-layer method in which an X-axis and a Y-axis electrode pattern are formed and bonded to two substrates (a first substrate and a second substrate), respectively. Since the touch panel bonded to the first and second substrates is bonded to a separate window substrate, the overall thickness is increased and thus the touch sensitivity is deteriorated, and the touch panel and the window substrate are bonded by an optical adhesive. Since a bonding process or a laminating process is necessary, there is a problem in that the efficiency of the process is lowered.

In order to solve the above problems, the 1-layer method in which the electrode pattern is directly formed on the rear surface of the window substrate has been introduced. In this case, since the X-axis electrode pattern and the Y-axis electrode pattern are formed on the same plane, Since the process of forming a neck-bridge type micropattern is necessary at the intersection of the Y-axis electrode pattern, there is a problem that the efficiency of the process decreases due to an increase in process time and a defective rate.

In addition, since a separate shatterproof layer formed of PET or the like for shatterproof of the window substrate made of glass material should be included, there was a limit to slimming the thickness.

The present invention relates to a touch window and a method of manufacturing the same, and more particularly, a touch panel manufactured by bonding one electrode pattern and electrode wiring selected from X-axis and Y-axis electrode patterns on the window substrate and the first substrate, respectively, and then bonding them together. It is possible to realize slim electronic devices by reducing the thickness with windows, and it is possible to increase the efficiency of the process by shortening the process and improving the yield since it is not necessary to form a fine pattern when forming the electrode pattern. The present invention provides a touch window with excellent sensitivity and a method of manufacturing the same.

In order to achieve the above object, a touch window according to the present invention includes a window substrate having a first touch sensing unit including a first touch electrode pattern and a first electrode wiring on one surface thereof, and a second touch electrode pattern and a second electrode wiring on one surface thereof. And an adhesive layer formed between the first substrate including the second touch sensing unit including the first touch sensing unit and the window substrate and the first substrate to face the first touch sensing unit of the window substrate and the second touch sensing unit of the first substrate. do.

And the adhesive layer is an optical adhesive (OCA Tape) or UV curable adhesive, in the case of the optical adhesive is characterized in that it is formed to a thickness of 5 ~ 500um.

In addition, the window substrate may include a light blocking portion formed on an edge region of one surface, a base layer formed on a substrate on which the light blocking portion is formed, a first touch electrode pattern formed on a display area on the base layer, and a display on the first touch electrode pattern. And a passivation layer formed on the first electrode wiring and the first touch electrode pattern and the first electrode wiring formed in the other region.

The first substrate may include a base layer formed on one surface, a second touch electrode pattern formed in a display area on the base layer, and a second electrode wire formed in an area other than the display on the first touch electrode pattern.

The passivation layer may be exposed by patterning a first electrode wiring region electrically connected to the FPCB.

In addition, the adhesive layer is formed to expose a portion of the first and second electrode wiring, it characterized in that the first and second electrode wiring and the FPCB is electrically connected through the exposed area.

The first touch electrode pattern and the first electrode wiring are a touch electrode pattern and an electrode wiring with respect to any one selected from an X-axis pattern or a Y-axis pattern, and the second touch electrode pattern and the second electrode wiring are the other. Touch electrode pattern and the electrode wiring for the axis of the.

The first and second touch electrode patterns may be formed of any one selected from ITO, IZO, ATO, conductive polymer, and CNT, and the first and electrode wirings may include Ag, Cu, Al paste, or Cu, Mo, Al, Cr. , Au, Ti, W is selected from any one or a mixture thereof selected from a single metal or selected from ITO, IZO, ATO, conductive polymer, CNT.

Meanwhile, a method of manufacturing a touch window includes (a) forming a first touch sensing unit on one surface of a window substrate, and forming a second touch sensing unit on one surface of the first substrate; and (b) the first touch sensing unit and a second touch sensing. And bonding the window substrate and the first substrate to face each other.

The forming of the first touch sensing unit on one surface of the window substrate may include forming a light blocking portion in an area other than a display on one surface of the window substrate, forming a base layer on the substrate on which the light blocking portion is formed, and transparency on the base layer. Coating a conductive material, coating and patterning a conductive material on the coated transparent conductive material to form a conductive material only in an area other than a display, and patterning the transparent conductive material and the conductive material to form a first touch electrode pattern; And forming a passivation layer on the first touch electrode pattern and the first electrode wiring.

The forming of the passivation layer may include patterning and exposing a region where the first electrode wiring and the FPCB are electrically connected.

The forming of the second touch sensing unit on one surface of the first substrate may include forming a base layer on one surface of the substrate and coating a transparent conductive material on the base layer and on the coated transparent conductive material. Coating and patterning the conductive material to form a conductive material only in an area other than the display; and patterning the transparent conductive material and the conductive material to form a second touch electrode pattern and a second electrode wiring. .

The bonding of the window substrate and the first substrate may include cutting the optical adhesive into a size at which the area where the first and second electrode wirings are electrically connected to the FPCB is exposed, and the optical adhesive therebetween. And aligning positions of the first touch sensing unit and the second touch sensing unit of the first substrate so as to face each other, and bonding the window substrate and the first substrate through the optical adhesive.

In the touch window and the method of manufacturing the same according to the present invention, the X and Y axis electrode patterns are formed on the window substrate and the first substrate, respectively, and then bonded to remove one substrate as compared to the conventional touch window. In addition, since the first substrate plays a role of preventing scattering, the thickness can be reduced, and an excellent effect, which is light and strong against external impact, and excellent in sensitivity of a touch function, occurs.

In addition, the neck bridge micropattern forming process is excluded, thereby simplifying the process, and an excellent effect of removing the pattern visible phenomenon occurs.

1 is a cross-sectional view schematically showing a touch window according to a preferred embodiment of the present invention,
FIG. 2 shows a detailed process diagram of FIG. 1.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

The touch sensing unit used in the present invention means a touch sensor electrode including an X-axis electrode sensor pattern and a Y-axis electrode sensor pattern formed in a display area, and electrode wirings are formed on the X-axis electrode sensor pattern and Y formed in an area other than the display. Each of the axis electrode sensor patterns will be defined as meaning circuit wiring for electrically connecting the FPCB.

1 is a cross-sectional view schematically showing a touch window according to a preferred embodiment of the present invention, Figure 2 shows a detailed process diagram of FIG.

1 and 2, a first touch sensing unit 120 including a first touch electrode pattern 123 and a first electrode wiring 124 on one surface of the substrate 110 of the touch window 10 according to the present invention. ) And a second touch sensing unit 220 having a second touch electrode pattern 222 and a second electrode wiring 223 formed on one surface of the substrate 210 of the first substrate 20.

Here, the first touch sensing unit 120 means one touch electrode pattern selected from among an X-axis electrode pattern or a Y-axis electrode pattern and an electrode wiring thereof, and the second touch sensing unit 220 represents the other touch. It means an electrode pattern and an electrode wiring thereof.

That is, when the first touch sensing unit 120 is the X-axis electrode pattern, the second touch sensing unit 220 is the Y-axis electrode pattern, and when the first touch sensing unit 120 is the Y-axis electrode pattern, The two touch sensing units 220 become X-axis electrode patterns.

An adhesive layer 30 bonding the touch window and the first substrate is formed between the window substrate 10 having the first touch sensing unit 120 and the first substrate 20 having the second touch sensing unit 220 formed thereon. Is formed. That is, the window substrate 10 and the first substrate 20 are bonded to each other such that the first touch sensing unit 120 and the second touch sensing unit 220 face each other with the adhesive layer 30 therebetween.

Here, the present embodiment is for the case where the first touch sensing unit is an X-axis pattern and the second touch sensing unit is a Y-axis pattern, but it is obvious that the pattern may be formed in reverse.

The touch window configured as described above is combined with the lower LCD module to complete the touch window display. Here, a noise shielding film (EMI Shield, not shown) may be included between the touch window and the lower LCD module to shield the noise.

More specifically, a method of manufacturing a touch window according to an exemplary embodiment of the present invention will be described.

First, as shown in FIG. 2A, a light blocking portion 121 in which various design elements, such as various logos, holograms, metals or wood materials, may be formed as an edge area other than a display area where light is blocked on one surface of the substrate 110 of the window substrate. To form. The light blocking portion 121 may be formed using a process such as silk screen printing or photolithography.

Subsequently, a base layer 122 for forming a transparent conductive material is formed on one surface of the window substrate on which the light blocking portion 121 is formed.

The transparent conductive material is formed on the base layer 122 of the window substrate by dry coating such as sputtering or wet coating such as spraying or dipping. The window substrate may be glass, tempered glass, plastic, acrylic or the like.

In addition, the transparent conductive material is indium tin oxide (ITO), indium zinc oxide (IZO, Indium Zinc Oxide), antimony tin oxide (ATO, Antimon Tin Oxide), conductive polymer, carbon nanotubes (CNT, Carbon NanoTube) may be used.

Subsequently, PR masking (photoresist 30) is applied onto the transparent conductive material as shown in FIG. 2B, and the PR masking is patterned only on the display area using a mask.

Then, the conductive material is coated on a region other than the display.

The conductive material is an electrode wiring material, aluminum (Al), copper (Cu), molybdenum (Mo), silver (Ag), chromium (Cr), gold (au), titanium (Ti), tungsten (W) It may be formed of any one or two or more alloys selected from metals such as or a conductive material selected from ITO, ATO, AZO, conductive polymer, CNT.

Here, the display area means the entire view area where the touch sensor electrode can be utilized, and the non-display area means the edge area that does not correspond to the display area as the light blocking unit.

More specifically, after PR masking (photoresist) 30 is applied on the transparent conductive material and patterned by a mask, wet coating such as dry coating or imprinting, printing, or the like of metal or conductive material serving as electrode wiring is performed. Forming with a coating to form a metal or conductive material only in the region other than the display where the PR masking is not formed, and peeling off the PR masking.

Thereafter, as shown in FIG. 2C, the first touch electrode pattern (X-axis touch electrode pattern 123) and the first electrode wiring (X-axis electrode wiring 124) are simultaneously patterned by a photolithography process.

More specifically, PR masking is applied on the transparent conductive material on which the conductive material is formed, and the UV light is irradiated and etched using a pattern mask to form a first touch electrode pattern (X-axis touch electrode pattern 123 and a first touch). After patterning the electrode wirings (X-axis electrode wirings 124), the PR masking is peeled off to form a first touch electrode pattern 123 and a first electrode wiring 124.

As shown in FIG. 2D, a passivation layer 125 is formed on the window substrate on which the first touch electrode pattern 123 and the first electrode wiring 124 are formed. As the passivation layer 125, a conventional organic or inorganic film may be used. For example, a thermal or UV curable material or an oxide or nitride such as SiO ₂ or SiNx may be used.

The passivation layer 125 may be patterned by removing a portion of the first electrode wire (X-axis electrode wire) connected to the FPCB.

In the present embodiment, a positive type is applied to PR masking and a pattern mask, but it is obvious that a negative type may be applied.

Subsequently, as shown in FIG. 2E, a base layer 221 is formed on one surface of the substrate 210 of the first substrate 20, and a second touch electrode pattern (Y-axis touch electrode pattern 222) and a second touch electrode pattern are formed on the base layer. A second touch sensing unit including electrode wirings (Y-axis electrode wirings 223) is formed.

The first substrate 20 may be made of acrylic, plastic, glass, PET, ITO film and the like can be used.

Here, in the process of forming the second touch sensing unit 220 on one surface of the substrate 210 of the first substrate 20, the first touch sensing unit 120 is formed on one surface of the substrate 110 of the window substrate 10. Since the process is the same as the detailed description thereof will be omitted.

As described above, when the first touch sensing unit 120 is formed on one surface of the window substrate 10, and the second touch sensing unit 220 is formed on one surface of the first substrate 20, the window substrate 10 and the first surface are formed. The substrate 20 is aligned with the first touch sensing unit 120 and the second touch sensing unit 220 so as to face each other, and then bonded by using an adhesive means.

Here, the adhesive means may be an optical adhesive (OCA Tape) or UV curable adhesive.

When the adhesive means is an optical adhesive, a portion of the first electrode wiring of the first touch sensing unit and a part of the second electrode wiring of the second touch sensing unit may be manufactured and used to expose the adhesive layer formed of the optical adhesive. The FPCB may be electrically connected to the first electrode wiring and the second electrode wiring through the region.

When the optical adhesive is too thick, the thickness increases, and when too thin, the durability may be degraded due to the decrease in adhesive force, so it is preferable to use a thickness in the range of 5 to 500 μm.

As described above, when the window substrate and the first substrate are bonded with the optical adhesive, the first substrate simultaneously plays a role of preventing scattering together with the touch sensing unit, thereby maximizing the thickness reduction effect.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

10: window substrate 110: substrate
120: first touch sensing unit 121: light blocking unit
122: base layer 123: first touch electrode pattern
124: first electrode wiring 125: passivation layer
20: first substrate 210: substrate
220: second touch sensing unit 221: base layer
222: second touch electrode pattern 223: second electrode wiring
30: adhesive layer

Claims (13)

A window substrate having a first touch sensing unit including a first touch electrode pattern and a first electrode wiring on one surface thereof;
A first substrate having a second touch sensing unit including a second touch electrode pattern and a second electrode wiring formed on one surface thereof;
And an adhesive layer formed between the window substrate and the first substrate to face the first touch sensing unit of the window substrate and the second touch sensing unit of the first substrate.
The method of claim 1,
The adhesive layer is
Optical adhesive (OCA Tape) or UV curable adhesive;
In the case of the optical adhesive, the touch window, characterized in that formed in 5 ~ 500um thickness.
The method of claim 1,
The window substrate is
A light blocking portion formed at an edge region of one surface;
A base layer formed on the substrate on which the light blocking portion is formed;
A first touch electrode pattern formed in the display area on the base layer;
First electrode wirings formed in an area other than the display on the first touch electrode pattern;
And a passivation layer formed on the first touch electrode pattern and the first electrode wiring.
The method of claim 1,
The first substrate is
A base layer formed on one surface;
A second touch electrode pattern formed in the display area on the base layer;
And a second electrode wiring formed in an area other than the display on the first touch electrode pattern.
The method of claim 3, wherein
The passivation layer is
And a first electrode wiring region electrically connected to the FPCB is patterned and exposed.
The method of claim 1,
The adhesive layer is
Some regions of the first and second electrode wirings are exposed;
The touch window, characterized in that the first and second electrode wiring and the FPCB is electrically connected through the exposed area.
The method according to claim 3 or 4,
The first touch electrode pattern and the first electrode wiring are
A touch electrode pattern and an electrode wiring with respect to any one axis selected from an X-axis pattern or a Y-axis pattern;
The second touch electrode pattern and the second electrode wiring are
The touch window, characterized in that the touch electrode pattern and the electrode wiring for the other axis.
The method of claim 7, wherein
The first and second touch electrode patterns
It is formed of any one selected from ITO, IZO, ATO, conductive polymer, CNT;
The first and electrode wirings
Ag, Cu, Al paste or Cu, Mo, Al, Cr, Au, Ti, W is formed of any one or a mixture thereof selected from a single metal or any one selected from ITO, IZO, ATO, conductive polymer, CNT Touch window
(a) forming a first touch sensing unit on one surface of the window substrate and forming a second touch sensing unit on one surface of the first substrate;
and (b) bonding the window substrate and the first substrate to face each other so that the first touch sensing unit and the second touch sensing unit face each other.
The method of claim 9,
Forming a first touch sensing unit on one surface of the window substrate
Forming a light blocking portion in an area other than a display on one surface of the window substrate;
Forming a base layer on the substrate on which the light blocking portion is formed;
Coating a transparent conductive material on the base layer;
Coating and patterning a conductive material on the coated transparent conductive material to form a conductive material only in an area other than a display;
Patterning the transparent conductive material and the conductive material to form a first touch electrode pattern and a first electrode wiring;
And forming a passivation layer on the first touch electrode pattern and the first electrode wiring.
The method of claim 10,
Forming the passivation layer
And patterning and exposing a region in which the first electrode wiring and the FPCB are electrically connected to each other.
The method of claim 9,
Forming a second touch sensing unit on one surface of the first substrate
Forming a base layer on one surface of the substrate;
Coating a transparent conductive material on the base layer;
Coating and patterning a conductive material on the coated transparent conductive material to form a conductive material only in an area other than a display;
And patterning the transparent conductive material and the conductive material to form a second touch electrode pattern and a second electrode wiring.
The method of claim 9,
Bonding the window substrate and the first substrate to each other
Cutting the optical adhesive to a size that exposes an area where the first and second electrode wirings are electrically connected to the FPCB;
Aligning the positions such that the first touch sensing portion of the window substrate and the second touch sensing portion of the first substrate face each other with an optical adhesive therebetween;
And bonding the window substrate and the first substrate through the optical adhesive.

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