CN104375727A - Capacitive touch screen and manufacturing method thereof - Google Patents
Capacitive touch screen and manufacturing method thereof Download PDFInfo
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- CN104375727A CN104375727A CN201410649938.6A CN201410649938A CN104375727A CN 104375727 A CN104375727 A CN 104375727A CN 201410649938 A CN201410649938 A CN 201410649938A CN 104375727 A CN104375727 A CN 104375727A
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- 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
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- 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
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention provides a capacitive touch screen and a manufacturing method of the capacitive touch screen. The capacitive touch screen comprises an electric-conduction circuit layer and leads, the electric-conduction circuit layer comprises multiple electrodes arranged at intervals in sequence, the leads are arranged on the edge of the electric-conduction circuit layer and used for connecting all the electrodes with control ports, and the electrodes and the leads are transparent electric-conduction layers. The electrodes are changed from original wire resistance to face resistance, then the resistance value of each electrode per unit area or per unit thickness will be greatly decreased, namely, the resistance value of each electrode is decreased, and the sensitivity of the touch screen is further improved. Moreover, the electrodes large in width are not prone to being broken off, so that the low yield, caused by broken electrodes, of the product is avoided. Meanwhile, it is avoided that printing ink is adopted for forming leads large in width, and therefore the non-visible region of the touch screen is prevented from becoming expander.
Description
Technical field
The present invention relates to touch screen technology field, in particular to the method for making of a kind of capacitive touch screen and capacitive touch screen.
Background technology
Along with the development of touch-screen industry, the advantage of capacitive touch screen is more and more outstanding, the requirement of people to capacitive touch screen is also more and more higher, and gently, thin, large scale, Rimless, high-res and sensitivity and multiple point touching be the inexorable trend of capacitive touch screen development.The inductive means of capacitive touch screen is the induction matrix (i.e. conductive circuit layer) that multiple row-column electrode is staggered to form, when user touches touch-screen, the mutual capacitance of the infall sensing unit of column electrode or row electrode can change, this change to port, thus finally detects the particular location of touch point by sense line (namely go between).
The conductive circuit layer of existing capacitive touch screen mainly comprises driver circuit layer and the sense line layer of stacked setting, and the drive electrode in driver circuit layer and the induction electrode in sense line layer are crisscross arranged.At present, the conducting wire of capacitive touch screen is also in continuous improvement.Such as, application number be the Chinese patent application of 201320732010.5 by drive electrode and induction electrode being designed to wavy and filling rhombus suspension block between drive electrode and induction electrodes, to improve visual effect and to achieve three-dimensional tactile effect; Application number be 201320491835.2 Chinese patent application devise a kind of novel I TO conductive film structure, this ITO conductive film structure can reduce the live width of the conducting wire of touch-screen, and reduces the width of the non-window area of touch-screen; Application number be the Chinese patent application of 201320339644.4 by sense line is arranged in around driver circuit, make touch-screen have larger operating window in identical physical dimension.
The conducting wire (i.e. electrode) of above-mentioned capacitive touch screen is usually by being formed after etching conductive material layer, and form conducting wire mainly based on line resistance, namely etch away most of conductive materials to form the conducting wire (its width is narrower) of wire.But the resistance of the conducting wire of wire is comparatively large, thus limits the raising of the increase of the size of touch-screen and the sensitivity of touch-screen.Simultaneously, because the resistance of conducting wire is larger, must starch to form induction line by adopting Screen-printed conductive silver in prior art between driver circuit and control zone (i.e. port), and adopt printing-ink to be formed the lead-in wire (being generally Ag wire) connecting conducting wire and port.But, the live width comparatively large (generally between 80 μm-200 μm) of lead-in wire, the non-viewing area of formed touch-screen is made to become large, and printing Ag slurry forms the phenomenon easily occurring burr, sawtooth and dry plate when going between, formed printing ink region (and non-viewing area) is made to become large further.Along with touch-screen market is to the demand of size and viewable area, edge conjunction wire can get more and more, if still adopt the design of above-mentioned conducting wire, the frame of touch-screen (i.e. non-viewing area) will certainly be made to become larger wider, thus affect the visual enjoyment of client.
Summary of the invention
Fundamental purpose of the present invention is the method for making providing a kind of capacitive touch screen and capacitive touch screen, to improve the sensitivity of touch-screen, and reduces the non-viewing area in touch-screen.
To achieve these goals, according to an aspect of the present invention, provide a kind of capacitive touch screen, this capacitive touch screen comprises: conductive circuit layer, comprises spaced multiple electrode successively; Lead-in wire, is arranged on the edge of conductive circuit layer, for being connected with control port by each electrode; Wherein, electrode and lead-in wire are transparency conducting layer.
Further, the square resistance of transparency conducting layer is less than 10 Ω/.
Further, the material of transparency conducting layer is tin indium oxide, Graphene, metal grill, Nano Silver or carbon nano-tube.
Further, electrode and lead-in wire are by obtaining after laser ablation transparent conductive material.
Further, the width of electrode is 1 ~ 10 μm.
Further, the width of electrode is 3.5 ~ 6 μm.
Further, capacitive touch screen comprises at least two control ports, and each control port is positioned on the edge of conductive circuit layer.
Further, conductive circuit layer comprises induction line layer and the driver circuit layer of stacked setting, electrode comprises the multiple induction electrodes be arranged in parallel be arranged in induction line layer, and is arranged at the multiple drive electrodes perpendicular to induction electrode in driver circuit layer.
Meanwhile, present invention also offers a kind of method for making of capacitive touch screen, this method for making comprises the following steps: deposit transparent conductive material is to form conducting wire preparation layers; Adopt laser etching process multiple etching cutting conducting wire preparation layers to form the conductive circuit layer be made up of multiple electrode, with the lead-in wire on the edge being positioned at conductive circuit layer and for being connected with control port by each electrode.
Further, the step forming conductive circuit layer and electrode comprises: deposit the first transparent conductive material; Adopt laser ablation first transparent conductive material to form the induction line layer be made up of multiple multiple induction electrodes be arranged in parallel; Induction line layer deposits the second transparent conductive material; Adopt laser ablation second transparent conductive material to form the driver circuit layer be made up of the multiple drive electrodes perpendicular to induction line layer, induction line layer and driver circuit layer composition conductive circuit layer, induction electrode and drive electrode form electrode.
Further, the step forming conductive circuit layer and electrode comprises: deposit the first transparent conductive material; Adopt laser ablation first transparent conductive material to form the driver circuit layer be made up of multiple multiple drive electrodes be arranged in parallel; Depositing insulating layer and the second transparent conductive material successively on driver circuit layer; Adopt laser ablation second transparent conductive material to form the induction line layer be made up of the multiple induction electrodes perpendicular to described driver circuit layer, induction line layer and described driver circuit layer composition conductive circuit layer, induction electrode and drive electrode form electrode.
Further, the first transparent conductive material and the second transparent conductive material are separately selected from any one in tin indium oxide, Graphene, metal grill, Nano Silver and carbon nano-tube.
Apply technical scheme of the present invention, the present invention is by providing the conductive circuit layer be made up of spaced multiple electrode successively, and adopt the transparency conducting layer with low-resistance value as resistance, thus achieve and become face to hinder by original line resistive at electrode, and then the resistance value that electrode is had in unit area and thickness can reduce (resistance value namely reducing electrode) greatly, and further increase the sensitivity of touch-screen.And, because electrode has larger width, make electrode be not easy to be fractureed, thus it is lower to avoid the product yield caused by fractureing due to electrode.Meanwhile, the present invention by adopting transparency conducting layer as lead-in wire, thus avoids employing printing-ink to form the larger lead-in wire of live width, and then the non-viewing area decreasing touch-screen becomes large.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the cross-sectional view of the induction line layer of the capacitive touch screen provided according to embodiment of the present invention; And
Fig. 2 shows the cross-sectional view of the driver circuit layer of the capacitive touch screen provided according to embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the application in detail in conjunction with the embodiments.
It should be noted that used term is only to describe embodiment here, and be not intended to the illustrative embodiments of restricted root according to the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative is also intended to comprise plural form, in addition, it is to be further understood that, " comprise " when using term in this manual and/or " comprising " time, it indicates existing characteristics, step, operation, device, assembly and/or their combination.
For convenience of description, here can usage space relative terms, as " ... on ", " in ... top ", " at ... upper surface ", " above " etc., be used for the spatial relation described as a device shown in the figure or feature and other devices or feature.Should be understood that, space relative terms is intended to comprise the different azimuth in use or operation except the described in the drawings orientation of device.Such as, " in other devices or structure below " or " under other devices or structure " will be positioned as after if the device in accompanying drawing is squeezed, being then described as the device of " above other devices or structure " or " on other devices or structure ".Thus, exemplary term " in ... top " can comprise " in ... top " and " in ... below " two kinds of orientation.This device also can other different modes location (90-degree rotation or be in other orientation), and relatively describe space used here and make respective explanations.
From background technology, the electrode of existing capacitive touch screen is usually by being formed after etching conductive material layer, and form conducting wire mainly based on line resistance, namely etch away most of conductive materials to form the conducting wire (its width is narrower) of wire.But the resistance of the conducting wire of wire is comparatively large, thus limits the raising of the increase of the size of touch-screen and the sensitivity of touch-screen.Simultaneously, because the live width of lead-in wire is larger, make the non-viewing area of formed touch-screen become large, and easily occur the phenomenon of burr, sawtooth and dry plate when printing Ag slurry forms lead-in wire, make formed printing ink region (and non-viewing area) become large further.
The present inventor studies for the problems referred to above, proposes a kind of capacitive touch screen.As depicted in figs. 1 and 2, this capacitive touch screen comprises: conductive circuit layer, comprises spaced multiple electrode successively; Lead-in wire 20, is arranged on the edge of conductive circuit layer, for being connected with control port 30 by each electrode; Wherein, electrode and lead-in wire 20 are transparency conducting layer.
Above-mentioned capacitive touch screen provided by the invention is by providing the conductive circuit layer be made up of spaced multiple electrode successively, and adopt the transparency conducting layer with low-resistance value as resistance, thus achieve and become face to hinder by original line resistive at electrode, and then the resistance value that electrode is had in unit area and thickness can reduce (resistance value namely reducing electrode) greatly, and further increase the sensitivity of touch-screen.And, because electrode has larger width, make electrode be not easy to be fractureed, thus it is lower to avoid the product yield caused by fractureing due to electrode.Simultaneously, the present invention is by adopting transparency conducting layer as lead-in wire 20, avoid and adopt printing-ink to form the larger lead-in wire of live width 20, thus decrease the non-viewing area of touch-screen, and then touch-screen can be made can to realize narrow frame even Rimless, further increase the visual effect of touch-screen, and promote the enforcement of large scale touch-screen.
The structure of the conductive circuit layer in above-mentioned capacitive touch screen has a variety of.In a preferred embodiment, as shown in Figure 1, conductive circuit layer comprises induction line layer and the driver circuit layer of stacked setting, electrode comprises the multiple induction electrodes 11 be arranged in parallel be arranged in induction line layer, and is arranged at the multiple drive electrodes 12 perpendicular to induction electrode 11 in driver circuit layer.
In above-mentioned conductive circuit layer, electrode and lead-in wire 20 are transparency conducting layer, and electrode and lead-in wire 20 are by obtaining after laser ablation transparent conductive material.So-called transparency conducting layer is the material layer had compared with low resistance and high light transmitance.Preferably, the square resistance of transparency conducting layer is less than 10 Ω/.The material of transparency conducting layer has a lot, and those skilled in the art can select the material of transparency conducting layer according to actual process demand.Preferably, the material of transparency conducting layer is tin indium oxide, Graphene, metal grill, Nano Silver or carbon nano-tube.Certainly, the material of transparency conducting layer is not limited in above-mentioned preference.The width of electrode can set according to actual process demand.In a preferred embodiment, the width of electrode is 1 ~ 10 μm.More preferably, the width of electrode is 3.5 ~ 6 μm.
Electrode all can be connected on a port 30 being positioned on the edge of conductive circuit layer in the prior art.And the increase of size along with touch-screen, the electrode be connected with port 30 can get more and more, thus affects the sensitivity of touch-screen, and increases the non-viewable area of touch-screen.In order to solve the problem, the present invention also further provides a kind of preferred version, on the edge of electric line layer, namely arrange few two control ports 30.By arranging at least two control ports 30 on the edge of conductive circuit layer, on the one hand the amount of calculation of each port 30 being reduced, thus further increasing the sensitivity of touch-screen; On the other hand the length of the lead-in wire 20 on touch-screen both sides is reduced greatly, thus further reduce the resistance of lead-in wire 20, and further reduce the non-viewing area of touch-screen.
Meanwhile, present invention also provides a kind of method for making of capacitive touch screen, this method for making comprises the following steps: deposit transparent conductive material is to form conducting wire preparation layers; Adopt laser etching process multiple etching cutting conducting wire preparation layers to form the conductive circuit layer be made up of multiple electrode, with the lead-in wire 20 on the edge being positioned at conductive circuit layer and for being connected with control port 30 by each electrode, and then form capacitive touch screen as described in Figure 1.
Above-mentioned method for making by etching transparent conductive material to form electrode, thus greatly reduces the etch amount of transparent conductive material, and avoids the waste of transparent conductive material.Meanwhile, above-mentioned method for making by etching transparent conductive material to form lead-in wire 20, thus avoids the various problems adopting ink printing formation lead-in wire 20 to bring, and simplifies technological process.Meanwhile, the laser ablation that above-mentioned method for making adopts has that cost is low, efficiency high; Adopt repeatedly laser-induced thermal etching cutting that conducting wire preparation layers can be made to be shredded, can reduce the electromagnetic screen of expectation, what be conducive to signal penetrates induction.
In a preferred embodiment, the step forming conductive circuit layer and electrode comprises: deposit the first transparent conductive material; Adopt laser ablation first transparent conductive material to form the induction line layer be made up of multiple multiple induction electrodes 11 be arranged in parallel; Depositing insulating layer and the second transparent conductive material successively on induction line layer; Adopt laser ablation second transparent conductive material to form the driver circuit layer be made up of the multiple drive electrodes 12 perpendicular to induction line layer, induction line layer and driver circuit layer composition conductive circuit layer, induction electrode 11 and drive electrode 12 form electrode.
In another preferred embodiment, the step forming conductive circuit layer and electrode comprises: deposit the first transparent conductive material; Adopt laser ablation first transparent conductive material to form the driver circuit layer be made up of multiple multiple drive electrodes 12 be arranged in parallel; Depositing insulating layer and the second transparent conductive material successively on driver circuit layer; Adopt laser ablation second transparent conductive material to form the induction line layer be made up of the multiple induction electrodes 11 perpendicular to driver circuit layer, induction line layer and driver circuit layer composition conductive circuit layer, induction electrode 11 and drive electrode 12 form electrode.
Preferably, above-mentioned first transparent conductive material and the second transparent conductive material are separately selected from any one in tin indium oxide, Graphene, metal grill, Nano Silver and carbon nano-tube.The technique forming the first transparent conductive material and the second transparent conductive material can be chemical vapor deposition etc.The technique of etching induction line preparation layers and driver circuit preparation layers can be laser etching process.The concrete technology parameter of above-mentioned technique with reference to prior art, can not repeat them here.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
(1) the present invention is by providing the conductive circuit layer be made up of spaced multiple electrode successively, and adopt the transparency conducting layer with low-resistance value as resistance, thus achieve and become face to hinder by original line resistive at electrode, and then the resistance value that electrode is had in unit area and thickness can reduce (resistance value namely reducing electrode) greatly, and further increase the sensitivity of touch-screen.Meanwhile, because electrode has larger width, make electrode be not easy to be fractureed, thus it is lower to avoid the product yield caused by fractureing due to electrode.
(2) the present invention is by adopting transparency conducting layer as lead-in wire, avoid and adopt printing-ink to form the larger lead-in wire of live width, thus decrease the non-viewing area of touch-screen, and then touch-screen can be made can to realize narrow frame even Rimless, further increase the visual effect of touch-screen, and promote the enforcement of large scale touch-screen.
(3) the present invention by arranging at least two control ports on the edge of conductive circuit layer, on the one hand the amount of calculation of each port reduced, thus further increase the sensitivity of touch-screen; On the other hand the length of the lead-in wire on touch-screen both sides is reduced greatly, thus further reduce the resistance of lead-in wire, and further reduce the non-viewing area of touch-screen.
(4) method for making of touch-screen provided by the invention is by etching transparent conductive material to form electrode, and form electrode width be greater than the width of the spacer region between adjacent electrode, thus greatly reduce the etch amount of transparent conductive material, and avoid the waste of transparent conductive material.
(5) this method for making is by etching transparent conductive material to form lead-in wire, thus avoids the various problems adopting ink printing formation lead-in wire to bring, and simplifies technological process.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a capacitive touch screen, is characterized in that, described capacitive touch screen comprises:
Conductive circuit layer, comprises spaced multiple electrode successively;
Lead-in wire (20), is arranged on the edge of described conductive circuit layer, for being connected with control port (30) by each described electrode; Wherein, described electrode and described lead-in wire (20) are transparency conducting layer.
2. capacitive touch screen according to claim 1, is characterized in that, the square resistance of described transparency conducting layer is less than 10 Ω/.
3. capacitive touch screen according to claim 2, is characterized in that, the material of described transparency conducting layer is tin indium oxide, Graphene, metal grill, Nano Silver or carbon nano-tube.
4. capacitive touch screen according to claim 1, is characterized in that, described electrode and described lead-in wire (20) are by obtaining after laser ablation transparent conductive material.
5. capacitive touch screen according to claim 1, is characterized in that, the width of described electrode is 1 ~ 10 μm.
6. capacitive touch screen according to claim 5, is characterized in that, the width of described electrode is 3.5 ~ 6 μm.
7. capacitive touch screen according to any one of claim 1 to 6, it is characterized in that, described capacitive touch screen comprises at least two described control ports (30), and each described control port (30) is positioned on the edge of described conductive circuit layer.
8. capacitive touch screen according to any one of claim 1 to 6, it is characterized in that, described conductive circuit layer comprises induction line layer and the driver circuit layer of stacked setting, described electrode comprises the multiple induction electrodes (11) be arranged in parallel be arranged in described induction line layer, and is arranged at the multiple drive electrodes (12) perpendicular to described induction electrode (11) in described driver circuit layer.
9. a method for making for capacitive touch screen, is characterized in that, described method for making comprises the following steps:
Deposit transparent conductive material is to form conducting wire preparation layers;
Laser etching process multiple etching is adopted to cut described conducting wire preparation layers to form the conductive circuit layer be made up of multiple electrode, with the lead-in wire (20) on the edge being positioned at described conductive circuit layer and for being connected with control port (30) by each described electrode.
10. method for making according to claim 9, is characterized in that, the step forming described conductive circuit layer and described electrode comprises:
Deposit the first transparent conductive material;
Adopt the first transparent conductive material described in laser ablation to form the induction line layer be made up of multiple multiple induction electrodes (11) be arranged in parallel;
Depositing insulating layer and the second transparent conductive material successively on described induction line layer;
Adopt the second transparent conductive material described in laser ablation to form the driver circuit layer be made up of the multiple drive electrodes (12) perpendicular to described induction line layer, described induction line layer and described driver circuit layer form described conductive circuit layer, and described induction electrode (11) and described drive electrode (12) form described electrode.
11. method for makings according to claim 9, is characterized in that, the step forming described conductive circuit layer and described electrode comprises:
Deposit the first transparent conductive material;
Adopt the first transparent conductive material described in laser ablation to form the driver circuit layer be made up of multiple multiple drive electrodes (12) be arranged in parallel;
Depositing insulating layer and the second transparent conductive material successively on described driver circuit layer;
Adopt the second transparent conductive material described in laser ablation to form the induction line layer be made up of the multiple induction electrodes (11) perpendicular to described driver circuit layer, described induction line layer and described driver circuit layer form described conductive circuit layer, and described induction electrode (11) and described drive electrode (12) form described electrode.
12. method for makings according to claim 10 or 11, it is characterized in that, described first transparent conductive material and described second transparent conductive material are separately selected from any one in tin indium oxide, Graphene, metal grill, Nano Silver and carbon nano-tube.
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| CN201410649938.6A CN104375727A (en) | 2014-11-14 | 2014-11-14 | Capacitive touch screen and manufacturing method thereof |
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| CN201410649938.6A CN104375727A (en) | 2014-11-14 | 2014-11-14 | Capacitive touch screen and manufacturing method thereof |
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| CN201410649938.6A Pending CN104375727A (en) | 2014-11-14 | 2014-11-14 | Capacitive touch screen and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108723618A (en) * | 2018-05-31 | 2018-11-02 | 江苏大学 | Improve the laser scanning minimizing technology of metal grill edge quality and its performance |
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| US20130257791A1 (en) * | 2012-03-30 | 2013-10-03 | Lianghua Mo | Capacitive touch screen and manufacturing method thereof |
| CN104142762A (en) * | 2013-05-06 | 2014-11-12 | 福建省辉锐材料科技有限公司 | Capacitive touch screen and preparation method thereof |
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| CN101126849A (en) * | 2007-08-30 | 2008-02-20 | 深圳市和而泰电子科技有限公司 | Condenser type contact screen and its manufacture method |
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