CN101587408B - Capacitance touch screen and method for preparing the same - Google Patents
Capacitance touch screen and method for preparing the same Download PDFInfo
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- CN101587408B CN101587408B CN2009101081448A CN200910108144A CN101587408B CN 101587408 B CN101587408 B CN 101587408B CN 2009101081448 A CN2009101081448 A CN 2009101081448A CN 200910108144 A CN200910108144 A CN 200910108144A CN 101587408 B CN101587408 B CN 101587408B
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Abstract
Capacitance touch screen and method for preparing the same, the touch screen includes a substrate, two sets of wire transparent conductive films, an insulation film, and two sets of low-resistance conductive film, two sets of transparent conductive films are disposed sectionally in interval and two sets of transparent conductive films are coincided corresponding to each other at every interval position; a first low-resistance conductive film connects with its transparent conductive film along direction of the first set of wires to form a continous set of wires, a second low-resistance conductive film crosses the first low-resistance conductive film along direction of the second set of wires to connect its transparent conductive film to form a second continous set of wires. An insulation film is disposed between two sets of low-resistance conductive films and covers surface of substrate adjacent to the first set of low-resistance conductive film, the second low-resistance conductive film covers the insulation film. The method produces the first, second set of transparent conductive films, an insulation film and low-resistance conductive film on the substrate step by step to implement the touch screen structure. The wires according to the invention are not easy to break which reduces resistance of wires, reduces chromatic aberration and electrical interference, and improves performance and quality of products.
Description
Technical field
The present invention relates to a kind of touch-screen, also relate to the manufacture method of this touch-screen, be specifically related to a kind of capacitive touch screen and manufacture method thereof.
Background technology
Capacitive touch screen comprises two groups of leads that intersect in length and breadth along directions X and Y direction, and there is following defective in existing capacitive touch screen harness wiring structure:
1, because the lead conducting membrane material adopts transparent material, and rete is thinner, the phenomenon that breaks appears in bridging rete above the crossing crunode place of two groups of leads is positioned at easily, causes the local broken string of lead;
2, lead conducting film line resistance is higher, reduces touch screen performance;
3, the stray capacitance of X, Y direction is bigger, and anti-acoustic capability is relatively poor, has reduced the sensitivity and the resolution of touch-screen;
4, two groups of leads of directions X and Y direction are space crossed, in manufacturing process, need to make earlier one group of lead conducting film of bottom, make dielectric film then, make the one group of lead conducting film in upper strata again.Because the nesa coating of two groups of leads must be made respectively, can cause the color distortion of two-layer conducting film, reduce the product quality of touch-screen;
5, because touch-screen lacks shielding construction, touch-screen can't be got rid of the electrical Interference from display device, causes touch screen performance to be affected.
Summary of the invention
One of the technical problem to be solved in the present invention is, a kind of capacitive touch screen is provided, and overcomes defectives such as existing capacitive touch screen exists line resistance height, sensitivity and the resolution of the local broken string of lead, lead conducting film not high, aberration.
Two of the technical problem to be solved in the present invention is, a kind of manufacture method of capacitive touch screen is provided, and overcomes defectives such as existing capacitive touch screen exists line resistance height, sensitivity and the resolution of the local broken string of lead, lead conducting film not high, aberration.
The present invention solves the technical scheme that one of its technical matters adopts: construct a kind of capacitive touch screen, comprise substrate, at substrate upper edge X, the nesa coating and the dielectric film of two groups of leads that the Y direction is arranged, it is characterized in that, the nesa coating space segmentation of first group of lead in described two groups of leads is provided with, the nesa coating of second group of lead in described two groups of leads is the space segmentation setting with described first group of lead, each interval location of this first group of lead nesa coating and the corresponding one by one coincidence of each interval location of this second group of lead nesa coating; Also comprise one or more layers of first group of low-resistance conductive, corresponding to one or more layers of second group of low-resistance conductive of second group of lead nesa coating corresponding to first group of lead nesa coating; Described first group of low-resistance conductive is along on the described substrate of first group of lead direction attached to the interval of the described first group of lead nesa coating part that is provided with at interval and this nesa coating this first group of lead nesa coating being connected into first group of continuous lead; Described second group of low-resistance conductive connects into continuous second group lead attached to the described second group of lead nesa coating part that is provided with at interval with this second group of lead nesa coating across described first group of low-resistance conductive along second group of lead direction; Described dielectric film is between described first group of low-resistance conductive and described second group of low-resistance conductive and cover described first group of low-resistance conductive and the contiguous described substrate surface of locating of this first group of low-resistance conductive, and described second group of low-resistance conductive covers described dielectric film and the described second group of lead nesa coating part that is connected.
In capacitive touch screen of the present invention, described dielectric film covers the described substrate surface at described first group of lead nesa coating part and this first group of low-resistance conductive and this contiguous place of first group of nesa coating of all described first group of low-resistance conductive, this first group of low-resistance conductive connection.
In capacitive touch screen of the present invention, described first group of low-resistance conductive width is less than the width of described first group of lead nesa coating.
In capacitive touch screen of the present invention, described second group of low-resistance conductive width is less than the width of described second group of lead nesa coating.
In capacitive touch screen of the present invention, described dielectric film is shaped as rectangle, square, circle or one of oval.
In capacitive touch screen of the present invention, described first group of low-resistance conductive is metal bridging film or low resistance nesa coating, and described second group of low-resistance conductive is metal bridging film or low resistance nesa coating.
In capacitive touch screen of the present invention, comprise screen layer, described screen layer is for being provided with the nesa coating opposite side lip-deep one or more layers of transparent conductive film layer relative with dielectric film one side of described two groups of leads attached to described substrate, the layout area of the setting area of described screen layer and described first group of lead, second group of lead adapts.
In capacitive touch screen of the present invention, described screen layer is continuous transparent conductive film layer or the transparent conductive film layer that pattern is set.
In capacitive touch screen of the present invention, comprise the insulating protective layer that covers on the described screen layer and expose the local tie point of screen layer.
Two technical schemes that adopted that the present invention solves its technical matters are: a kind of manufacture method of capacitive touch screen is provided, comprises the steps:
S1, on substrate, make the nesa coating of first group, second group lead at the same time or separately, the nesa coating space segmentation of first group of lead is provided with, the nesa coating of second group of lead is the space segmentation setting with first group of lead, each interval location of this first group of lead nesa coating and the corresponding one by one coincidence of each interval location of this second group of lead nesa coating;
S2, make first group of low-resistance conductive, on the substrate at the interval of first group of low-resistance conductive and this nesa coating local attached to the first group of lead nesa coating that is provided with at interval this first group of lead nesa coating connected into first group of continuous lead along first group of lead direction corresponding to first group of lead nesa coating;
S3, making dielectric film, dielectric film cover the first group of low-resistance conductive of two groups of lead infalls and the substrate surface at this contiguous place of first group of low-resistance conductive;
S4, make second group of low-resistance conductive corresponding to second group of lead nesa coating, second group of low-resistance conductive covers dielectric film across first group of low-resistance conductive and second group of lead nesa coating part being provided with at interval connects into second group of continuous lead with this second group of lead nesa coating along second group of lead direction.
In the manufacture method of capacitive touch screen of the present invention, being included in described substrate is provided with on the nesa coating of the described two groups of leads opposite side surface relative with dielectric film one side, making is attached to the step of this lip-deep nesa coating screen layer, and the layout area of the setting area of this screen layer and described first group of lead, second group of lead adapts.
In the manufacturing of capacitive touch screen of the present invention, be included in and make the step that covers this screen layer and expose the insulating protective layer of the local tie point of screen layer on the described screen layer.
Implement capacitive touch screen of the present invention and manufacture method thereof, compared with the prior art, its beneficial effect is:
1. the low-resistance conductive layer is thicker, is not prone to the broken string phenomenon, has improved the continuity of two groups of leads;
2. the line resistance of low-resistance conductive layer has reduced the line resistance of two groups of leads much smaller than the line resistance of transparent lead rete, has improved the performance of touch-screen;
3. when contiguous second group of lead nesa coating one lateral edges of dielectric film and do not contact second group of lead nesa coating, perk can not appear in the dielectric film edge, so the low-resistance conductive layer can not break at the edge of dielectric film, has improved yield of products.
4. the transparent conductive film layer of two groups of leads can be made simultaneously, avoided making respectively the aberration that causes, improved the product quality of touch-screen, simultaneously, owing to be provided with transparency conducting layer as screen layer at substrate back, can effectively get rid of electrical Interference, guarantee that touch screen performance is immune from display device;
5. adopt the decussate texture of two groups of low-resistance conductive layers, the line resistance of low-resistance conductive layer is little, low-resistance conductive can be done very narrowly, thereby make the intersection region area of two low-resistance conductive layers become very little, then the stray capacitance of X, Y direction is less, reach noise reduction preferably, and then technical features such as the sensitivity of raising touch-screen and resolution.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural plan figure of the node of a kind of embodiment of capacitive touch screen of the present invention.
Fig. 2 is an A-A sectional view among Fig. 1.
Fig. 3 is the process flow diagram of a kind of embodiment of manufacture method of capacitive touch screen of the present invention.
Embodiment
As shown in Figure 1 and Figure 2, capacitive touch screen of the present invention comprise substrate 1, nesa coating, dielectric film 3 and two groups of low-resistance conductive of two groups of leads arranging at substrate 1 upper edge X, Y direction.
The nesa coating 2 space segmentation settings of first group of lead in two groups of leads, the nesa coating 4 of second group of lead is the space segmentation setting with first group of lead, each interval location of this first group of lead nesa coating 2 and the corresponding one by one coincidence of each interval location of this second group of lead nesa coating 4.
First group of low-resistance conductive 5 in two groups of low-resistance conductive is provided with corresponding to first group of lead nesa coating 2, and second group of low-resistance conductive 6 is provided with corresponding to second group of lead nesa coating 4.First group of low-resistance conductive 5 is along on the substrate 1 of first group of lead direction attached to the interval of local and this nesa coating of the first group of lead nesa coating 2 that is provided with at interval this first group of lead nesa coating 2 being connected into first group of continuous lead.Second group of low-resistance conductive 6 connects into continuous second group lead attached to the part of the second group of lead nesa coating 2 that is provided with at interval with this second group of lead nesa coating 2 across first group of low-resistance conductive 5 along second group of lead direction.
Above-mentioned low-resistance conductive can adopt and include but not limited to metal bridging film or low resistance nesa coating.First group of low-resistance conductive 5 and second group of low-resistance conductive 6 can adopt following combination:
1, first group of low-resistance conductive 5 and second group of low-resistance conductive 6 all adopt metal bridging film;
2, first group of low-resistance conductive 5 and second group of low-resistance conductive 6 all adopt the low resistance nesa coating;
3, first group of low-resistance conductive 5 adopts metal bridging film, and second group of low-resistance conductive 6 adopts the low resistance nesa coating;
4, first group of low-resistance conductive 5 adopts the low resistance nesa coating, and second group of low-resistance conductive 6 adopts metal bridging film.
In the present embodiment, dielectric film 3 covers whole first group of low-resistance conductive 5, also covers local and this local substrate 1 surface of first group of lead nesa coating, 2 connections of connection of first group of lead nesa coating 2 of first group of low-resistance conductive, 5 connections.In other embodiments, dielectric film 3 can only cover local and substrate 1 surface that should the part of intersecting of first group of low-resistance conductive 5 of intersecting with second group of low-resistance conductive 6.
As required, first group of low-resistance conductive can adopt one deck, two-layer, three layers or multilayer, and second group of low-resistance conductive also can adopt one deck, two-layer, three layers or multilayer.
In the present embodiment, the width of first group of low-resistance conductive 5 is less than the width of first group of lead nesa coating 2.In other embodiments, as required, the width of first group of low-resistance conductive 5 can be equal to or greater than the width of first group of lead nesa coating 2.
Equally, in the present embodiment, the width of second group of low-resistance conductive 6 is less than the width of second group of lead nesa coating 4.In other embodiments, as required, the width of second group of low-resistance conductive 6 can be equal to or greater than the width of second group of lead nesa coating 4.
In the present embodiment, the shape of dielectric film 3 adopts rectangle.In other embodiments, the shape of dielectric film 3 can adopt and include but not limited to square, circle or oval.
In order to get rid of electrical Interference from display device, guarantee that touch screen performance is immune, capacitive touch screen of the present invention can be provided with screen layer 7.
As shown in Figure 2, screen layer 7 is provided with on the nesa coating 2,4 of the two groups of leads opposite side surface relative with dielectric film 3 one sides attached to substrate 1, adopts one or more layers of transparent conductive film layer.The layout area of the setting area of screen layer 7 and first group of lead and second group of lead adapts, and is promptly satisfying under the condition of shielding requirements, the zone of screen layer 7 can equal, less than or greater than the layout area of first group of lead and second group of lead.
For protection mask layer 7, the insulating protective layer (not shown) that covers screen layer 7 can be set, expose the local tie point of screen layer on the insulating protective layer, so that connect the lead-in wire of screen layer 7.
As Fig. 1, shown in Figure 3, the manufacture method of capacitive touch screen of the present invention comprises the steps:
The first step, while are made the nesa coating 2,4 of first group, second group lead on substrate 1, the nesa coating 2 space segmentation settings of first group of lead, the nesa coating 4 of second group of lead is the space segmentation setting with first group of lead, each interval location of this first group of lead nesa coating 2 and the corresponding one by one coincidence of each interval location of this second group of lead nesa coating 4.
Second step, make 5, the first groups of low-resistance conductive 5 of first group of low-resistance conductive corresponding to first group of lead nesa coating 2 along on the substrate 1 of first group of lead direction attached to the interval of local and this nesa coating 2 of the first group of lead nesa coating 2 that is provided with at interval this first group of lead nesa coating 2 being connected into first group of continuous lead.
The 3rd step, making dielectric film 3, on first group of low-resistance conductive 5 of two groups of lead infalls of dielectric film 3 coverings and substrate 1 surface at these first group of low-resistance conductive, 5 contiguous places.
The 4th step, 6, the second groups of low-resistance conductive 6 of second group of low-resistance conductive of making corresponding to second group of lead nesa coating 4 connect into continuous second group lead across the part that first group of low-resistance conductive 5 covers second group of lead nesa coating 4 of dielectric film 3 and interval setting with this second group of lead nesa coating 4 along second group of lead direction.
In the first step, as required, substep is made the nesa coating 4,2 of first group of lead and second group of lead on substrate 1, do not influence the realization of the object of the invention.
In other embodiments, in order to realize the shielding requirements of touch-screen, the manufacture method of capacitive touch screen of the present invention comprises the step of making screen layer, this step is provided with on the nesa coating 2,4 of the two groups of leads opposite side surface relative with dielectric film 3 one sides at substrate 1 and makes attached to this lip-deep nesa coating screen layer 7, and the layout area of the setting area of this screen layer 7 and first group of lead, second group of lead adapts.This step can the above-mentioned first step, second the step, the 3rd the step, the 4th the step before, among or carry out afterwards.
In other embodiments; in order to realize protection to the screen layer 7 of touch-screen; the manufacture method of capacitive touch screen of the present invention comprises the step of the insulating protective layer of making screen layer, and this step is made the insulating protective layer that covers this screen layer 7 and expose the local tie point of screen layer on screen layer 7.This step is carried out after the step of above-mentioned making screen layer.
Claims (12)
1. capacitive touch screen, the nesa coating and the dielectric film of two groups of leads that comprise substrate, arrange at substrate upper edge X, Y direction, it is characterized in that, the nesa coating space segmentation of first group of lead in described two groups of leads is provided with, the nesa coating of second group of lead in described two groups of leads is the space segmentation setting with described first group of lead, each interval location of this first group of lead nesa coating and the corresponding one by one coincidence of each interval location of this second group of lead nesa coating; Also comprise one or more layers of first group of low-resistance conductive, corresponding to one or more layers of second group of low-resistance conductive of second group of lead nesa coating corresponding to first group of lead nesa coating; Described first group of low-resistance conductive is along on the described substrate of first group of lead direction attached to the interval of the described first group of lead nesa coating part that is provided with at interval and this nesa coating this first group of lead nesa coating being connected into first group of continuous lead; Described second group of low-resistance conductive connects into continuous second group lead attached to the described second group of lead nesa coating part that is provided with at interval with this second group of lead nesa coating across described first group of low-resistance conductive along second group of lead direction; Described dielectric film is between described first group of low-resistance conductive and described second group of low-resistance conductive and cover described first group of low-resistance conductive and the contiguous described substrate surface of locating of this first group of low-resistance conductive, and described second group of low-resistance conductive covers described dielectric film and the described second group of lead nesa coating part that is connected.
2. capacitive touch screen as claimed in claim 1, it is characterized in that described dielectric film covers the described substrate surface at described first group of lead nesa coating part and this first group of low-resistance conductive and this contiguous place of first group of nesa coating of all described first group of low-resistance conductive, this first group of low-resistance conductive connection.
3. capacitive touch screen as claimed in claim 1 is characterized in that, described first group of low-resistance conductive width is less than the width of described first group of lead nesa coating.
4. capacitive touch screen as claimed in claim 1 is characterized in that, described second group of low-resistance conductive width is less than the width of described second group of lead nesa coating.
5. capacitive touch screen as claimed in claim 1 is characterized in that, described dielectric film is shaped as rectangle, square, circle or one of oval.
6. capacitive touch screen as claimed in claim 1 is characterized in that, described first group of low-resistance conductive is metal bridging film or low resistance nesa coating, and described second group of low-resistance conductive is metal bridging film or low resistance nesa coating.
7. as the described capacitive touch screen of one of claim 1 to 6, it is characterized in that, comprise screen layer, described screen layer is for being provided with the nesa coating opposite side lip-deep one or more layers of transparent conductive film layer relative with dielectric film one side of described two groups of leads attached to described substrate, the layout area of the setting area of described screen layer and described first group of lead, second group of lead adapts.
8. capacitive touch screen as claimed in claim 7 is characterized in that, described screen layer is continuous transparent conductive film layer or the transparent conductive film layer that pattern is set.
9. capacitive touch screen as claimed in claim 8 is characterized in that, comprises the insulating protective layer that covers on the described screen layer and expose the local tie point of screen layer.
10. the manufacture method of a capacitive touch screen comprises the steps:
S1, on substrate, make the nesa coating of first group, second group lead at the same time or separately, the nesa coating space segmentation of first group of lead is provided with, the nesa coating of second group of lead is the space segmentation setting with first group of lead, each interval location of this first group of lead nesa coating and the corresponding one by one coincidence of each interval location of this second group of lead nesa coating;
S2, make first group of low-resistance conductive, on the substrate at the interval of first group of low-resistance conductive and this nesa coating local attached to the first group of lead nesa coating that is provided with at interval this first group of lead nesa coating connected into first group of continuous lead along first group of lead direction corresponding to first group of lead nesa coating;
S3, making dielectric film, dielectric film cover the first group of low-resistance conductive of two groups of lead infalls and the substrate surface at this contiguous place of first group of low-resistance conductive;
S4, make second group of low-resistance conductive corresponding to second group of lead nesa coating, second group of low-resistance conductive covers dielectric film across first group of low-resistance conductive and second group of lead nesa coating part being provided with at interval connects into second group of continuous lead with this second group of lead nesa coating along second group of lead direction.
11. the manufacture method of capacitive touch screen as claimed in claim 10, it is characterized in that, being included in described substrate is provided with on the nesa coating of the described two groups of leads opposite side surface relative with dielectric film one side, making is attached to the step of this lip-deep nesa coating screen layer, and the layout area of the setting area of this screen layer and described first group of lead, second group of lead adapts.
12. the manufacture method of capacitive touch screen as claimed in claim 11 is characterized in that, is included in and makes the step that covers this screen layer and expose the insulating protective layer of the local tie point of screen layer on the described screen layer.
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| CN102968227B (en) * | 2010-02-02 | 2015-08-19 | 宸鸿光电科技股份有限公司 | The manufacture method of single-layer projected capacitive touch panel |
| EP2541381B1 (en) * | 2010-02-24 | 2017-09-06 | Kyocera Corporation | Input device, display device, and portable terminal |
| CN101980122A (en) * | 2010-09-30 | 2011-02-23 | 深圳市中显微电子有限公司 | Capacitance type touch screen touchpad and manufacturing method thereof |
| CN102109931B (en) * | 2010-11-26 | 2012-11-28 | 华映视讯（吴江）有限公司 | Configuration system and method thereof for conductive film of panel |
| TWI467441B (en) * | 2012-12-04 | 2015-01-01 | Au Optronics Corp | Touch panel and touch display panel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324827A (en) * | 2007-06-14 | 2008-12-17 | 爱普生映像元器件有限公司 | Capacitive input device |
| CN101359267A (en) * | 2007-07-30 | 2009-02-04 | 比亚迪股份有限公司 | Capacitance touch screen and making method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324827A (en) * | 2007-06-14 | 2008-12-17 | 爱普生映像元器件有限公司 | Capacitive input device |
| CN101359267A (en) * | 2007-07-30 | 2009-02-04 | 比亚迪股份有限公司 | Capacitance touch screen and making method thereof |
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Assignee: Zhejiang Jinley Coating Co., Ltd. Assignor: Shenzhen Laibao Hi-tech Co., Ltd. Contract record no.: 2012330000016 Denomination of invention: Capacitance type touch screen and manufacturing method thereof Granted publication date: 20110413 License type: Exclusive License Open date: 20091125 Record date: 20120208 |