CN103186305A - Capacitive touch screen and manufacturing method thereof - Google Patents
Capacitive touch screen and manufacturing method thereof Download PDFInfo
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- CN103186305A CN103186305A CN201310075255XA CN201310075255A CN103186305A CN 103186305 A CN103186305 A CN 103186305A CN 201310075255X A CN201310075255X A CN 201310075255XA CN 201310075255 A CN201310075255 A CN 201310075255A CN 103186305 A CN103186305 A CN 103186305A
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Abstract
The invention discloses a capacitive touch screen and a manufacturing method thereof. The manufacturing method comprises the following steps of: after carrying out surface chemical reinforcement on a glass substrate, plating a transparent conductive film layer on one surface of the glass substrate; etching a circuit on the transparent conductive film layer to obtain a conductive glass substrate on which a conductive film layer pattern is distributed; carrying out silk-printing of insulation ink at the position of a border outside a conductive small hole in the surface plated with the transparent conductive film layer and curing the ink to form a black insulating film layer, wherein the inside of the border is a visible range; carrying out silk-printing of conductive ink on the conductive small hole and curing the ink to obtain a black conductive film layer; and adhering the black conductive film layer to a flexible circuit board to obtain the touch screen. The method not only can simultaneously meet appearance quality (i.e. coloring of the border of the touch screen) and functional quality (i.e. connection conduction of an edge electrode of the touch screen and the flexible circuit board) of an OGS (One Glass Solution) capacitive screen, but also can simplify the process flow, reduce equipment investment, improve yield of the product and reduce production cost.
Description
Technical field
The present invention relates to the capacitive touch screen technical field, particularly relate to single-glass structure (OGS) capacitive touch screen and preparation method thereof.
Background technology
One Glass Solution(is called for short OGS) refer to the direct technology that forms ITO conducting film and sensor on cover glass, a glass plays the double action of cover glass and touch sensor simultaneously.Because the OGS technology is integrated in a sheet glass with electro-conductive glass and cover glass; can satisfy ultra-thinization of intelligent terminal demand preferably; and lifting display effect; therefore adopt capacitance touch screen product specification height, thin thickness, the processing procedure of OGS structure to simplify, be conducive to reduce production costs, promote properties of product and produce yield.
The key of this production technology is how to guarantee the presentation quality of capacitive touch screen, can guarantee its service quality again.Because ink silk screen printing both can have been caused touch screen panel border dimpling at the outside surface of touch-screen, deinking is faded easily again.So, must be with ink silk screen printing on the inside surface (being ITO conducting film aspect) of touch-screen, to reach the presentation quality requirement.But, ink silk screen printing may be influenced its service quality again at the inside surface of touch-screen, because the printing ink of insulation can cover the electrode at conductive film layer edge, make it can't normally be connected energising with flexible circuit board (being called for short FPC).
Employing is that the method for showing the conductive film layer edge electrodes in the made black conductive ink silk screen printing touch-screen of primary raw material has solved this technical barrier with carbon black and graphite.Yet, because always there are certain difference in the color of electrically conductive ink and the color of common dielectric ink, cause having aberration between the painted of edge electrodes position and other position of frame painted, thereby influence the presentation quality of OGS touch-screen.
Summary of the invention
In view of this, the objective of the invention is to propose a kind of capacitive touch screen and preparation method thereof, this method can reduce even eliminate substantially the aberration between black conductive rete and the black insulating film layer as much as possible.
Based on above-mentioned purpose, the method for making of capacitive touch screen provided by the invention comprises:
Glass substrate is carried out plating transparent conductive film layer in the one side of glass substrate again after surface chemistry strengthens;
Etched circuit on the transparent conductive film layer obtains being distributed with the conducting glass substrate of conductive film layer pattern;
At the described face that is coated with transparent conductive film layer, reserve several conduction apertures at edge electrodes, to the frame position silk-screen dielectric ink except described conduction aperture, and cured printing ink, forming the black insulating film layer, frame inside is visible area;
Silk-screen electrically conductive ink on the conduction aperture of reserving, and cured printing ink form the black conductive rete;
Described black conductive rete and flexible circuit board are pasted, thereby obtained touch-screen.
Alternatively, the shape of described conduction aperture is selected from least a in circle, square, rectangle or the triangle.
Preferably, the total area of described conduction aperture is 20～40% of edge electrodes surface area.
Alternatively, described method for making further comprises: with the described electro-conductive glass substrate that cuts into monolithic through etched conducting glass substrate, then by boring, edging and polishing process with the machine-shaping of described electro-conductive glass substrate, it is chemical enhanced again it to be carried out the edge.
Alternatively, the step of described plating transparent conductive film layer comprises: tin indium oxide vacuum coating on the one side of glass substrate.
Alternatively, described etched circuit step is: adopt gold-tinted etch process etched circuit pattern on transparent conductive film layer.
Alternatively, described electrically conductive ink is that primary raw material is made with carbon black and graphite.
Alternatively, square resistance≤100 of described electrically conductive ink rete ohm.
Alternatively, described base plate glass is tempered glass.
The present invention also provides a kind of capacitive touch screen, and described capacitive touch screen is that the method for making according to above-mentioned capacitive touch screen makes.
From above as can be seen, the method for making of capacitive touch screen provided by the invention is the frame position silk-screen dielectric ink the conduction aperture on the edge electrode earlier, then the conduction aperture on the silk-screen electrically conductive ink, make on the conduction aperture and form the black conductive rete, at last this black conductive rete and flexible circuit board are pasted.The presentation quality (being that the touch screen frame is painted) that not only can satisfy the OGS capacitance plate simultaneously and service quality (being the touch screen edge electrodes and the conduction that is connected of flexible circuit board), and can simplify technological process, minimizing equipment drops into, and improves the product yield and reduces production costs.And, since electrically conductive ink only silk-screen the conduction aperture on, the area of conduction aperture is small, and it is discontinuously arranged, naked eyes almost can't be differentiated the color distortion of its existence, thereby reached the purpose of eliminating aberration between black conductive rete and the black insulating film layer, further improved the presentation quality of OGS touch-screen.
Description of drawings
Fig. 1 is embodiment of the invention conducting glass substrate structural representation;
Fig. 2 is the electro-conductive glass substrate structure synoptic diagram of embodiment of the invention monolithic;
Fig. 3 is used for the structural representation of the silk-screen half tone of silk-screen dielectric ink for the embodiment of the invention;
Fig. 4 is used for the structural representation of the silk-screen half tone of silk-screen electrically conductive ink for the embodiment of the invention;
Fig. 5 is the structural representation that embodiment of the invention OGS capacitance touch screen finished product is connected with chip.
Wherein: 1, conducting glass substrate, 2, the conductive film layer pattern, 3, edge electrodes, 4, the frame position, 5, the conduction aperture, 6, trawl gallow, 7, visible area, 8, grenadine, 9, flexible circuit board, 10, chip (IC), 11, connector.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As one embodiment of the present of invention, be example to prepare 67 inches OGS capacitance touch screen, its concrete method for making comprises:
1. get one of the Kang Lin glass substrate of specification 406.44mm * 355.6mm * 0.7mm, earlier it is carried out surface chemistry and strengthen, tin indium oxide (being called for short ITO) vacuum coating on the one side of this tempered glass then obtains transparent conductive film layer.
2. by gold-tinted etch process etched circuit pattern in ITO vacuum coating, make the conductive film layer pattern 2 that is distributed with 6 individual layer cablings on the conducting glass substrate 1, referring to Fig. 1.
With described through the etched conducting glass substrate 1 electro-conductive glass substrate that to cut into 6 specifications be 189.74mm * 118.54mm * 0.7mm, as shown in Figure 2, by operations such as boring, edging and polishings described electro-conductive glass substrate is processed into required form then, it is chemical enhanced again it to be carried out the edge.Wherein, conductive film layer pattern 2 is connected with edge electrodes 3, and edge electrodes 3 is positioned at the frame position 4 of electro-conductive glass substrate.
4. make corresponding and coupling each other two pull springs seal half tone with touch screen frame and conduction aperture, referring to Fig. 3 and 4, be respectively the structural representation that the embodiment of the invention is used for the silk-screen dielectric ink and is used for the silk-screen half tone of silk-screen electrically conductive ink.
5. referring to Fig. 3, described electro-conductive glass substrate is installed to accurately contraposition under the half tone of a screen printer, at the described face that is coated with transparent conductive film layer, reserve conduction aperture 5 at edge electrodes 3, to the frame position 4 silk-screen dielectric inks except conduction aperture 5 (conduction aperture 5 and visible area 7 be the silk-screen dielectric ink not), and cured printing ink, make the frame position form the black insulating film layer, frame inside is that visible area 7,8 is grenadine.
As can be seen from the figure, be reserved with circular conduction aperture 5 on the rectangular edge electrodes 3, not the silk-screen dielectric ink.Preferably, be reserved with 4 conduction apertures 5 on every edge electrodes 3 equably, hole diameter is about 0.2mm.
Alternatively, the number of conduction aperture 5 can be decided according to the touch-screen size, and the quantity of described conduction aperture 5 also can 3, and 5,6 etc.Preferably, the total area of described conduction aperture is about 30% of edge electrodes surface area.
Need to prove that the shape of described conduction aperture 5 also can be square, rectangle and triangle etc.
6. referring to Fig. 4, described electro-conductive glass substrate is installed to again accurately contraposition under the half tone of another screen printer, to the conduction aperture 5 silk-screen electrically conductive inks of reserving on the edge electrodes 3, and cured printing ink, make conduction aperture 5 form the black conductive retes.Therefore, the conduction aperture 5 silk-screen electrically conductive inks on the edge electrodes 3, the position silk-screen dielectric ink on the edge electrodes 3 except conduction aperture 5.
7. black conductive rete and the flexible circuit board 9 that will conduct electricity on the aperture 5 by bound device pasted, thereby obtains OGS capacitance plate substrate.
8. the visible area 7 at described OGS capacitance plate substrate pastes blow-out discs, and two table glue are pasted at the frame position, at the another side pasting protective film of described touch-screen etc., namely gets OGS capacitance plate finished product.
Further, as shown in Figure 5, welding (SMT) chip (IC) 10 and connector 11 on the flexible circuit board 9.
Alternatively, described electrically conductive ink is that primary raw material is made with carbon black and graphite.
Alternatively, square resistance≤100 of described electrically conductive ink rete ohm.
Hence one can see that, the method for making of capacitive touch screen provided by the invention is the frame position silk-screen dielectric ink the conduction aperture on the edge electrode earlier, this layer dielectric ink not only will cover the frame position of whole touch screen, but also most areas of edge electrodes to be covered, then the conduction aperture on the silk-screen electrically conductive ink, make on the conduction aperture and form the black conductive rete, at last this black conductive rete and flexible circuit board are pasted.
Because the color of electrically conductive ink and the color of common dielectric ink are more approaching, and be aterrimus, with its silk-screen (except 4 at the frame position of conduction the aperture 5 still silk-screen dielectric ink) formed black conductive rete to the conduction aperture 5 of edge electrodes 3, it is painted both to have can be conduction aperture 5, can realize the conduction that is connected of edge electrodes 3 and flexible circuit board 8 again.The presentation quality (namely touch frame painted) that not only can satisfy the OGS touch-screen simultaneously and service quality (being the touch screen edge electrodes and the conduction that is connected of flexible circuit board), and can simplify technological process, minimizing equipment drops into, and improves the product yield and reduces production costs.
And, since electrically conductive ink only silk-screen the conduction aperture on, the area of conduction aperture is small, and it is discontinuously arranged, naked eyes almost can't be differentiated the color distortion of its existence, thereby reached the purpose of eliminating aberration between black conductive rete and the black insulating film layer, further improved the presentation quality of OGS capacitance plate.
The method for making of capacitive touch screen provided by the invention has greatly been dwindled the silk-screen stained area of electrically conductive ink, substantially eliminated the aberration between black conductive rete and the black insulating film layer, and the painted aperture of the electrically conductive ink on the edge electrodes has been realized the stickup conduction of edge electrodes and winding displacement, thus the presentation quality of producing and service quality comparatively desirable OGS capacitance plate all.Its production cost only is equivalent to other technical approach and makes about 60% of equal specification class capacitance plate, makes its cost performance maintain the leading position in the world.Therefore, the present invention has tangible economic technology benefit, can drive China's capacitance plate industry to low-cost and extra-thin direction fast development.
Those of ordinary skill in the field are to be understood that: the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for making of a capacitive touch screen is characterized in that, described method for making comprises:
Glass substrate is carried out plating transparent conductive film layer in the one side of glass substrate again after surface chemistry strengthens;
Etched circuit on the transparent conductive film layer obtains being distributed with the conducting glass substrate of conductive film layer pattern;
At the described face that is coated with transparent conductive film layer, reserve several conduction apertures at edge electrodes, to the frame position silk-screen dielectric ink except described conduction aperture, and cured printing ink, forming the black insulating film layer, frame inside is visible area;
Silk-screen electrically conductive ink on the conduction aperture of reserving, and cured printing ink form the black conductive rete;
Described black conductive rete and flexible circuit board are pasted, thereby obtained touch-screen.
2. the method for making of a kind of capacitive touch screen according to claim 1 is characterized in that, the shape of described conduction aperture is selected from least a in circle, square, rectangle or the triangle.
3. the method for making of a kind of capacitive touch screen according to claim 2 is characterized in that, the total area of described conduction aperture is 20～40% of edge electrodes surface area.
4. the method for making of a kind of capacitive touch screen according to claim 1, it is characterized in that, described method for making comprises: with the described electro-conductive glass substrate that cuts into monolithic through etched conducting glass substrate, then by boring, edging and polishing process with the machine-shaping of described electro-conductive glass substrate, it is chemical enhanced again it to be carried out the edge.
5. the method for making of a kind of capacitive touch screen according to claim 1 is characterized in that, the step of described plating transparent conductive film layer comprises: tin indium oxide vacuum coating on the one side of glass substrate.
6. the method for making of a kind of capacitive touch screen according to claim 1 is characterized in that, described etched circuit step is: adopt gold-tinted etch process etched circuit pattern on transparent conductive film layer.
7. the method for making of a kind of capacitive touch screen according to claim 1 is characterized in that, described electrically conductive ink is that primary raw material is made with carbon black and graphite.
8. the method for making of a kind of capacitive touch screen according to claim 7 is characterized in that, square resistance≤100 of described electrically conductive ink rete ohm.
9. the method for making of a kind of capacitive touch screen according to claim 1 is characterized in that, described glass substrate is tempered glass.
10. a capacitive touch screen is characterized in that, described capacitive touch screen is that the method for making according to any described capacitive touch screen in the claim 1～9 makes.
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| CN201310075255.XA CN103186305B (en) | 2013-03-11 | 2013-03-11 | A kind of capacitive touch screen and preparation method thereof |
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| CN201310075255.XA CN103186305B (en) | 2013-03-11 | 2013-03-11 | A kind of capacitive touch screen and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103365477A (en) * | 2013-07-18 | 2013-10-23 | 东莞市平波电子有限公司 | OGS (one glass solution) touch panel and manufacturing method thereof |
| CN103455224A (en) * | 2013-08-09 | 2013-12-18 | 东莞市胜大光电科技有限公司 | Process for manufacturing capacitive touch screen with OGS (one glass solution) substrate |
| CN103558953A (en) * | 2013-10-11 | 2014-02-05 | 东莞市胜大光电科技有限公司 | Black capacitor type OGS substrate touch screen production process |
| CN103699287A (en) * | 2014-01-02 | 2014-04-02 | 无锡力合光电传感技术有限公司 | Single-chip capacitance touch screen and preparation method thereof |
| CN103761017A (en) * | 2014-01-10 | 2014-04-30 | 深圳市宇顺电子股份有限公司 | Electronic equipment and manufacturing method for single-layered multipoint capacitive touch screen and touch layer |
| CN103777834A (en) * | 2014-01-27 | 2014-05-07 | 无锡力合光电传感技术有限公司 | Single-chip capacitor touch screen based on organic glass pane and preparation method of single-chip capacitor touch screen |
| CN104035642A (en) * | 2014-06-16 | 2014-09-10 | 南京点面光电有限公司 | OGS (one glass solution) capacitive touch screen and preparation method thereof |
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| CN101630215A (en) * | 2009-06-29 | 2010-01-20 | 深圳莱宝高科技股份有限公司 | Capacitance type touch screen and manufacturing method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103365477A (en) * | 2013-07-18 | 2013-10-23 | 东莞市平波电子有限公司 | OGS (one glass solution) touch panel and manufacturing method thereof |
| CN103365477B (en) * | 2013-07-18 | 2017-02-22 | 东莞市平波电子有限公司 | OGS (one glass solution) touch panel and manufacturing method thereof |
| CN103455224A (en) * | 2013-08-09 | 2013-12-18 | 东莞市胜大光电科技有限公司 | Process for manufacturing capacitive touch screen with OGS (one glass solution) substrate |
| CN103558953A (en) * | 2013-10-11 | 2014-02-05 | 东莞市胜大光电科技有限公司 | Black capacitor type OGS substrate touch screen production process |
| CN103699287A (en) * | 2014-01-02 | 2014-04-02 | 无锡力合光电传感技术有限公司 | Single-chip capacitance touch screen and preparation method thereof |
| CN103761017A (en) * | 2014-01-10 | 2014-04-30 | 深圳市宇顺电子股份有限公司 | Electronic equipment and manufacturing method for single-layered multipoint capacitive touch screen and touch layer |
| CN103777834A (en) * | 2014-01-27 | 2014-05-07 | 无锡力合光电传感技术有限公司 | Single-chip capacitor touch screen based on organic glass pane and preparation method of single-chip capacitor touch screen |
| CN104035642A (en) * | 2014-06-16 | 2014-09-10 | 南京点面光电有限公司 | OGS (one glass solution) capacitive touch screen and preparation method thereof |
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