CN204856443U - Capacitive touch screen - Google Patents
Capacitive touch screen Download PDFInfo
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- CN204856443U CN204856443U CN201520326413.9U CN201520326413U CN204856443U CN 204856443 U CN204856443 U CN 204856443U CN 201520326413 U CN201520326413 U CN 201520326413U CN 204856443 U CN204856443 U CN 204856443U
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- conductive layer
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- ito conductive
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Abstract
The utility model discloses a capacitive touch screen, it includes and is fixed with the ITO conducting layer by the PET substrate on this PET substrate, is fixed with optical cement OCA on this ITO conducting layer, a FPC with the ITO conducting layer switches on mutually, and the ITO conducting layer is bound with FPC lug connection, be fixed with transparent cover on the optical cement OCA. Compared with the prior art, the utility model discloses a ITO conducting layer and FPC lug connection bind, save printing silver thick liquid process, make the work simplification, reduce material consumption, improve yield efficiency, reduction in production cost.
Description
Technical field
The utility model relates to touch-screen, particularly a kind of capacitive touch screen.
Background technology
Current individual layer ITO (IndiumTinOxides, nano indium tin oxide) on conductive layer FILM capacitive touch screen traditional structure general as shown in Figure 1, be made up of transparent cover plate 1 (Lens), optical cement OCA2 (OpticallyClearAdhesive transparent optical cement), ITO conductive layer, PET base material 5 (Polythyleneterephthalate, polyethylene terephthalate).ITO conductive layer in PET base material 5 forms required pattern through etching, and then prints conductive silver paste 3, and on conductive silver paste 3, combination optical glue OCA bonds together Lens transparent cover plate 1.As shown in Figure 2, wiring region is positioned on the four edges of touch-screen, and in figure, shade filling part abcd is wiring region.Middle ABCD is visible area, and FPC (FlexiblePrintedCircuit) is flexible PCB e.ITO conductive layer 4 is etched into required pattern, and conductive silver paste 3 circuit of wiring region printing connects conducting the pattern of ITO conductive layer 4, and FPC connects with conductive silver paste 3 circuit again.When finger touch is to touch-screen visible area, electric capacity pressure-sensitive occurs for ITO conductive layer 4 and finger changes and causes curent change, electric current imports to by ITO conductive layer 4, conductive silver paste 3 circuit, FPC the chip be connected with this touch-screen, and chip detection curent change calculates and judges touch coordinate position.
In existing technique, conductive silver paste 3 plays bridge joint and contraposition effect, because ITO is transparent sightless, so ITO is difficult to directly be connected with the correct contraposition of FPC, can only first by printing the silver slurry of visible conduction, and silver is starched to be connected with FPC again and is realized conducting object.Connect up connect ITO circuit and FPC, printing conductive silver paste 3 complex procedures so conductive silver paste 3 need be printed in wiring region, silver-colored pulp material is expensive, can produce silver slurry broken string, short circuit, adhesion weak, oxidizable etc. bad in production.
Utility model content
The purpose of this utility model is, for the deficiencies in the prior art, provides a kind of capacitive touch screen, solve existing single-layer and transparent conductive coating structure technology for manufacturing touch screen complicated, consume conductive silver paste, cost is high and yield is not high problem.
The technical scheme that the utility model is adopted for achieving the above object is:
A kind of capacitive touch screen, it comprises PET base material, is fixed with ITO conductive layer in this PET base material, this ITO conductive layer is fixed with optical cement OCA, one FPC and described ITO conductive layer are conducted, and ITO conductive layer and FPC directly connect and bind, and described optical cement OCA is fixed with transparent cover plate.
The shape size of described PET base material, ITO conductive layer is identical, and on this ITO conductive layer, etching has pattern.
The preparation method of described capacitive touch screen, it comprises the following steps:
(1) the ITO Conductive Layer Etch molding pattern in PET base material;
(2) in this PET base material, fixed optics glue OCA is combined;
(3) touch-screen granule excision forming;
(4) FPC pressing is tied on touch-screen granule;
(5)) laminating transparent cover plate, completes the preparation process of capacitive touch screen.
In described step (1), this PET base material is coated with ITO conductive layer, by etching solution, ITO conductive layer is etched, thus form pattern in PET base material, this patterned conductive.
Etching speed is 2.0m/min to 3m/min, and etch temperature is 49 DEG C to 51 DEG C, and the proportioning of this etching solution is HCL:H2O:HNO3=5:4:0.8, wherein H-ion concentration 6-7mol/L.
In described step (2), by unit mahine, optical cement OCA covering is fixed in this PET base material.
In described step (3), by die-cutting machine, the PET base material covering optical cement OCA is divided into the functional sheet of some Xiao Zhangs by specification size.
In described step (4), binding pressure is 1.75 kilograms, and binding temperature is 170 DEG C to 180 DEG C, makes the conducting of FPC and ITO conductive layer.
This ITO conductive layer is provided with visual target, the effect of location (changing contraposition) is played by target, under clear camera device, ITO conductive layer is directly connected with FPC contraposition, by turnover plate type chip mounter, transparent cover plate and the Xiao Zhang's functional sheet having bound FPC are fitted, thus complete the preparation process of capacitive touch screen.
In the utility model, ITO conductive layer is directly connected conducting with FPC, and conductive silver paste is not printed in centre.
The beneficial effects of the utility model are: compared with prior art, and the utility model is is directly connected and bound by ITO conductive layer and FPC, save the silver-colored slurry process of printing, technique is simplified, reduce supplies consumption, improve yield efficiency, reduce production cost.
Below in conjunction with accompanying drawing and embodiment, the utility model is further illustrated.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of existing touch-screen;
Fig. 2 is the vertical view of existing touch-screen;
Fig. 3 is structural representation of the present utility model.
Embodiment
Embodiment: as shown in Figure 3, a kind of capacitive touch screen of the utility model, it comprises PET base material 5, ITO conductive layer 4 is fixed with in this PET base material 5, this ITO conductive layer 4 is fixed with optical cement OCA2, one FPC and described ITO conductive layer 4 are conducted, and ITO conductive layer 4 and FPC directly connect and bind, and described optical cement OCA2 is fixed with transparent cover plate 1.
The shape size of described PET base material 5, ITO conductive layer 4 is identical, and on this ITO conductive layer 4, etching has pattern.
The preparation method of described capacitive touch screen, it comprises the following steps:
(1) the ITO conductive layer 4 etch-forming pattern in PET base material 5;
(2) in this PET base material 5, fixed optics glue OCA2 is combined;
(3) touch-screen granule excision forming;
(4) FPC pressing is tied on touch-screen granule;
(5)) laminating transparent cover plate 1, completes the preparation process of capacitive touch screen.
In described step (1), this PET base material 5 is coated with ITO conductive layer, by etching solution, ITO conductive layer is etched, thus form pattern in PET base material 5, this patterned conductive.
Etching speed is 2.0m/min to 3m/min, and etch temperature is 49 DEG C to 51 DEG C, and the proportioning of this etching solution is HCL:H2O:HNO3=5:4:0.8, wherein H-ion concentration 6-7mol/L.
In described step (2), by unit mahine, optical cement OCA2 covering is fixed in this PET base material 5.
In described step (3), by die-cutting machine, the PET base material 5 covering optical cement OCA2 is divided into the functional sheet of some Xiao Zhangs by specification size.
In described step (4), binding pressure is 1.75 kilograms, and binding temperature is 170 DEG C to 180 DEG C, makes FPC and ITO conductive layer 4 conducting.
Under clear camera device, ITO conductive layer 4 is directly connected with FPC contraposition, transparent cover plate 1 and the Xiao Zhang's functional sheet having bound FPC is fitted, thus complete the preparation process of capacitive touch screen by turnover plate type chip mounter.FPC (FlexiblePrintedCircuit) is flexible PCB e.
The touch-screen that the utility model provides, is is directly connected and bound with FPC by ITO conductive layer 4, saves in the middle of prior art and need be connected by printing silver slurry, thus reduce production cost, increase work efficiency.
In the utility model, after ITO conductive layer 4 above PET base material 5 etches good pattern, conductive silver paste 3 need not be republished, ITO conductive layer 4 is directly connected conducting with FPC, and conductive silver paste 3 is not printed in centre, and direct combination optical glue OCA2 and Lens bonds together, compared with prior art, the utility model is is directly connected and bound by ITO conductive layer 4 and FPC, saves the silver-colored slurry process of printing, technique is simplified, reduce supplies consumption, improves yield efficiency, reduces production cost.
The foregoing is only preferred embodiment of the present utility model, all equalizations done according to the utility model right change and modify, and all should belong to the covering scope of the utility model claim.
Claims (2)
1. a capacitive touch screen, it is characterized in that: it comprises PET base material, ITO conductive layer is fixed with in this PET base material, this ITO conductive layer is fixed with optical cement OCA, one FPC and described ITO conductive layer are conducted, ITO conductive layer and FPC directly connect and bind, and described optical cement OCA is fixed with transparent cover plate.
2. capacitive touch screen according to claim 1, it is characterized in that, the shape size of described PET base material, ITO conductive layer is identical, and on this ITO conductive layer, etching has pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520326413.9U CN204856443U (en) | 2015-05-20 | 2015-05-20 | Capacitive touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520326413.9U CN204856443U (en) | 2015-05-20 | 2015-05-20 | Capacitive touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204856443U true CN204856443U (en) | 2015-12-09 |
Family
ID=54746975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520326413.9U Expired - Fee Related CN204856443U (en) | 2015-05-20 | 2015-05-20 | Capacitive touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204856443U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109871141A (en) * | 2018-12-29 | 2019-06-11 | 赣州市德普特科技有限公司 | A kind of wiring region guard method in technology for manufacturing touch screen |
-
2015
- 2015-05-20 CN CN201520326413.9U patent/CN204856443U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109871141A (en) * | 2018-12-29 | 2019-06-11 | 赣州市德普特科技有限公司 | A kind of wiring region guard method in technology for manufacturing touch screen |
| CN109871141B (en) * | 2018-12-29 | 2023-02-03 | 赣州市德普特科技有限公司 | Wiring area protection method in touch screen manufacturing process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20160520 |