CN104850281A - Production process for capacitive touch screen - Google Patents
Production process for capacitive touch screen Download PDFInfo
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- CN104850281A CN104850281A CN201410054917.XA CN201410054917A CN104850281A CN 104850281 A CN104850281 A CN 104850281A CN 201410054917 A CN201410054917 A CN 201410054917A CN 104850281 A CN104850281 A CN 104850281A
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Abstract
The invention relates to a touch screen technology and discloses a production process for a capacitive touch screen. The production process comprises the following steps of S301 cutting; S302 covering a dry film; S303 exposing and curing a dry film layer; S304 developing a copper film pattern in a non-touch area; S305 etching a copper film layer; S306 cleaning the dry film; S307 covering the dry film again; S308 transferring circuit line diagrams; S309 developing circuit patterns; and S310 etching circuit lines. According to the capacitive touch screen prepared by the production process, a minimum width of a space between the circuit lines of the copper film layer reaches 0.05 mm, and in comparison with the existing space between the circuit lines, the space is greatly reduced, so that the touch screen with a narrow frame can be produced; meanwhile, the circuit line diagrams on the copper film layer and the indium-tin-oxide film layer are transferred at one time and are synchronously etched, the lines of the non-touch area and electrode patterns of a touch area are subjected to chemical etching twice without interference on each other, so that the yield of products is improved, the production process is simplified and the production efficiency is greatly improved.
Description
Technical field
The present invention relates to the technical field of touch-screen, particularly relate to capacitive touch screen and manufacture craft thereof.
Background technology
Touch-screen becomes human-computer interaction device the most intuitively, is widely used in the manipulation input of various electronic equipment.Touch-screen kind is mainly divided into resistance-type, condenser type, infrared type and surface acoustic wave type according to principle, and wherein capacitive touch screen has and good touches by feel, is easy to operation, can carries out referring to the advantages such as touch-control, light transmission are good, fast response time more and be applied widely.
The principle of capacitive touch screen is: utilize the electric current of human body to respond to and carry out work, four limits of touch-screen arrange long and narrow electrode, in electric conductor, form a low-voltage AC electric field; When finger touch, because human body electric field and touch screen surface are formed with a coupling capacitance, for high-frequency current, electric capacity is direct conductor, so finger siphons away a very little electric current from contact point.This electric current flows out respectively from the electrode the corner of touch-screen, and the electric current flowing through these four electrodes is directly proportional to the distance of finger to corner, and controller, by the accurate Calculation to these four current ratios, draws the position of touch point.
At present, in the method for making of capacitive touch screen, no matter be the touch-screen of single layered transparent electrode or Double-layered transparent electrode, the wiring in non-touch-control district adopts the method for printing conductive inks or adopts gold-tinted making technology, have operation various, cost is higher, the problem that yields is lower, the frame in demand touch-screen periphery non-touch-control district is more and more narrow especially now, and traditional circuit technique is difficult to realize.
Summary of the invention
The defect that the method for making that the invention solves prior art capacitive touch screen has, provides a kind of method for making of capacitive touch screen, and its production yields is improved, and wiring closeness improves, and reduces production process, improving production efficiency.
The present invention solves above-mentioned technical matters by following technical proposals, the present invention is such realization: a kind of manufacture craft of capacitive touch screen, comprise non-touch-control district and Touch Zone, described non-touch-control district is the region arranging copper film circuit layer at the periphery internal layer of touch-screen, and this region is used for wiring; Described Touch Zone is the region being provided with transparent indium tin oxide films circuit layer at touch screen center position internal layer, and this region arranges touch control electrode route map.
The invention provides a kind of method for making of capacitive touch screen, indium tin oxide films layer on panel and copper film layer carve circuit respectively, and described panel from bottom to top, comprises pet substrate layer, indium tin oxide films layer and copper film layer respectively, it is characterized in that, its method for making comprises the following steps:
Step 301, sawing sheet, according to the shape of single product display screen, size and and typesetting quantity, cut the panel of required size.
Step 302, cover dry film, use laminating machine the dry film material for ultraviolet exposure to be overlayed on the upper surface of copper film layer, form thin film layer;
Step 303, exposure curing photopolymer layer, the typesetted film is fitted in the photopolymer layer upper surface of panel, after being irradiated through the film by the uviol lamp of exposure machine, dry film produces polyreaction and forms the upper surface that a kind of stable material is attached to copper film layer, and designed good non-tactile district graph transfer printing is on the dry film of copper film layer upper surface.
Step 304, non-tactile district graphic visualization, move apart photopolymer layer by the film, uses developer solution will be transferred in photopolymer layer by non-tactile district graphic visualization out.
Step 305, etch copper rete, using copper etchant solution to etch away Petting Area not having the copper film layer of figure part, remaining the copper film layer in non-tactile district;
Step 306, remove dry film, use de-dry film liquid that the photopolymer layer overlaying on copper film layer upper surface is washed off the panel having etched copper film, panel periphery figure copper film layer retains, and the copper film layer in centre is removed, expose transparent indium tin oxide films layer, define the Petting Area of transparent window.
Step 307, again cover dry film, be again coated with at the upper surface of the copper film layer and indium tin oxide films layer of holding form successfully and be covered with photopolymer layer.
Step 308, transfer printing circuit diagram, the film designing circuit is fitted in the photopolymer layer upper surface of panel, after the irradiation of exposure machine, dry film produces polyreaction and forms the upper surface that a kind of stable material is attached to figure copper film layer and indium tin oxide films layer respectively, and designed good circuit-line figure is disposable is transferred in dry film upper surface.
Step 309, circuitous pattern video picture, move apart photopolymer layer by the film, uses developer solution will be transferred in photopolymer layer by circuitous pattern video picture out.
Step 310, etched circuit circuit, use copper etchant solution to etch out the copper film layer circuit-line in non-tactile district, then uses indium tin oxide films etching solution to etch out by the telegraph circuit of Petting Area.
Step 311, coating antioxidation coating, after having etched circuit-line, use liquid parting the dry film eccysis of upper surface overlaying on copper film circuit layer and indium tin oxide films conductive layer, then be coated with and be covered with antioxidation coating, the circuit on copper film layer and indium tin oxide films ITO conductive layer is covered in touch panel middle layer.
Beneficial effect of the present invention is: the present invention is by after above-mentioned manufacture craft, form capacitance touch screen board, screen board is fitted optical clear height viscose OCA, laser cutting machine is used to carry out the cutting of one-body touch screen board according to design specification, the copper film lead-in wire of one-body touch screen board is connected with the flexible circuit of signal transacting, composition capacitance type touch screen equipment.The copper film layer circuit trace interval minimum value width achieving touch-screen reaches 0.05mm, requires greatly to reduce, can produce the touch-screen of narrow frame than existing circuit cabling interval minimum value width 0.1mm; Meanwhile, the disposable transfer printing of circuit-line figure on copper film layer and indium tin oxide films layer, same to step etching, the circuit in non-touch-control district and the electrode pattern of Touch Zone adopt twice chemical etching, non-interference, improve the yields of product, simplify production process, substantially increase production efficiency.
Accompanying drawing explanation
Fig. 1 is capacitive touch screen structure schematic diagram of the present invention;
Fig. 2 is capacitive touch screen structure sectional view of the present invention;
Fig. 3 is panel construction schematic diagram of the present invention;
Fig. 4 is the exposure imaging schematic diagram in manufacturing process of the present invention;
Fig. 5 is the non-tactile district graphic visualization schematic diagram in manufacturing process of the present invention;
Fig. 6 is method for making of the present invention and process flow diagram.
Description of reference numerals
1, non-touch-control district, 2, Touch Zone, 11, copper wire, 101, PET basic unit, 102, indium tin oxide films circuit layer, 103, copper film circuit layer, 104, protection against oxidation layer, 105, photopolymer layer, 106, the film, 107, exposure lamp.
Embodiment
In order to make object of the present invention and technical scheme clearly, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
As shown in Figure 1 and Figure 2, the invention provides a kind of capacitive touch screen, comprise non-touch-control district 1 and Touch Zone 2, described non-touch-control district 1 is the region arranging copper film circuit layer 103 at the periphery internal layer of touch-screen, and this region is used for wiring; Described Touch Zone 2 is the regions being provided with transparent indium tin oxide films circuit layer at touch screen center position internal layer, and this region is used for touch-control circuit wiring.
As shown in Figure 5, Figure 6, a kind of capacitive touch screen manufacture method of the present invention adopts etching method, and the indium tin oxide films layer 102 on panel and copper film layer 103 carve circuit respectively, and this method for making specifically comprises the following steps:
Step 301, sawing sheet, according to the shape of single product display screen, size and and typesetting quantity, cut the panel of required size.As shown in Figure 4, described panel from bottom to top, comprises pet substrate layer 101, indium tin oxide films layer 102 and copper film layer 103 respectively.
Step 302, cover dry film, use laminating machine the dry film material for ultraviolet exposure to be overlayed on the upper surface of copper film layer 103, form thin film layer 105;
Step 303, exposure curing photopolymer layer, as shown in Figure 5, the typesetted film 106 is fitted in photopolymer layer 105 upper surface of panel, after being irradiated through the film by the uviol lamp 107 of exposure machine, dry film 105 can produce polyreaction and form the upper surface that a kind of stable material is attached to copper film layer, and designed good non-tactile district graph transfer printing is on the dry film 105 of copper film layer 103 upper surface.
Step 304, non-tactile district graphic visualization, move apart photopolymer layer 105 by the film 106, uses developer solution will be transferred in photopolymer layer 105 by non-tactile district graphic visualization out.
Step 305, etch copper rete, using copper etchant solution to etch away Petting Area 2 not having the copper film layer 103 of figure part, remaining the copper film layer 103 of non-tactile district 1 figure;
Step 306, remove dry film, use de-dry film liquid that the photopolymer layer 105 overlaying on copper film layer 103 upper surface is washed off the panel having etched copper film.
Further illustrate, above-mentioned steps 302-306, industry is commonly called as makes panel open form, is the specification according to single touch-screen and wiring, designs the area in Petting Area and non-tactile district, and unnecessary copper film is removed.As shown in Figure 4, the periphery copper film layer 103 of panel retains, and the copper film layer 103 in centre is removed, and exposes transparent indium tin oxide films layer 102, defines the Petting Area 2 of transparent window.
Step 307, again cover dry film, be again coated with at the upper surface of the copper film layer 103 and indium tin oxide films layer 102 of holding form successfully and be covered with photopolymer layer.
Step 308, transfer printing circuit diagram, the film designing circuit is fitted in the photopolymer layer upper surface of panel, after being irradiated through the film by the ultraviolet of exposure machine, dry film can produce polyreaction and form the upper surface that a kind of stable material is attached to copper film layer and indium tin oxide films layer, and the line pattern of designed good circuit is disposable is transferred in dry film upper surface.
Step 309, circuitous pattern video picture, move apart photopolymer layer by the film, uses developer solution will be transferred in photopolymer layer by circuitous pattern video picture out.
Step 310, etched circuit circuit, use copper etchant solution to etch out the copper film layer circuit-line in non-tactile district, utilize indium tin oxide films ITO etching solution to etch out by the conducting channel of Petting Area simultaneously.The copper cabling 11 interval minimum value width achieving copper film circuit layer reaches 0.05mm, requires greatly to reduce, can produce the touch-screen of narrow frame than existing circuit cabling interval minimum value width 0.1mm.
Step 311, coating antioxidation coating, after will circuit-line having been etched, use liquid parting the dry film eccysis of upper surface overlaying on copper film layer and indium tin oxide films ITO conductive layer, then be coated with and be covered with antioxidation coating, the circuit on copper film layer and indium tin oxide films ITO conductive layer is covered in touch panel middle layer.
After above-mentioned manufacture craft, form capacitance touch screen board, screen board is fitted optical clear height viscose OCA, laser cutting machine is used to carry out the cutting of one-body touch screen board according to the space of a whole page of design, the lead-in wire of one-body touch screen board is connected with the flexible circuit of signal transacting, form capacitance type touch screen equipment, the circuit of the electric field of human body touch point position and the indium tin oxide films ITO conductive layer of Petting Area is formed with a coupling capacitance, point and siphon away a very little electric current from contact point, control processor is by the current ratio in accurate Calculation four orientation, draw the accurate location of touch point.
Above-described is only preferred embodiments of the present invention.It should be pointed out that for the person of ordinary skill of the art, these only illustrate, protection scope of the present invention is limited by the accompanying claims.And under the prerequisite not departing from principle of the present invention and essence, can also make some improvement and modification, this is also considered as protection scope of the present invention.
Claims (1)
1. the manufacture craft of a capacitive touch screen, indium tin oxide films layer on panel and copper film layer distinguish etched circuit, and described panel from bottom to top, comprises pet substrate layer, indium tin oxide films layer and copper film layer respectively, it is characterized in that, its method for making comprises the following steps:
S301, sawing sheet, according to the shape of single product display screen, size and and typesetting quantity, cut the panel of required size.
S302, cover dry film, use laminating machine the dry film material for ultraviolet exposure to be overlayed on the upper surface of copper film layer, form thin film layer;
S303, exposure curing photopolymer layer, the typesetted film is fitted in the photopolymer layer upper surface of panel, after being irradiated through the film by the uviol lamp of exposure machine, dry film produces polyreaction and forms the upper surface that a kind of stable material is attached to copper film layer, and designed good non-tactile district graph transfer printing is on the dry film of copper film layer upper surface.
S304, non-tactile district graphic visualization, move apart photopolymer layer by the film, uses developer solution will be transferred in photopolymer layer by non-tactile district graphic visualization out.
S305, etch copper rete, using copper etchant solution to etch away Petting Area not having the copper film layer of figure part, remaining the copper film layer in non-tactile district;
S306, remove dry film, use de-dry film liquid that the photopolymer layer overlaying on copper film layer upper surface is washed off the panel having etched copper film, panel periphery figure copper film layer retains, and the copper film layer in centre is removed, expose transparent indium tin oxide films layer, define the Petting Area of transparent window.
S307, again cover dry film, be again coated with at the upper surface of the copper film layer and indium tin oxide films layer of holding form successfully and be covered with photopolymer layer.
S308, transfer printing circuit diagram, the film designing circuit is fitted in the photopolymer layer upper surface of panel, after the irradiation of exposure machine, dry film produces polyreaction and forms the upper surface that a kind of stable material is attached to figure copper film layer and indium tin oxide films layer respectively, and designed good circuit-line figure is disposable is transferred in dry film upper surface.
S309, circuitous pattern video picture, move apart photopolymer layer by the film, uses developer solution will be transferred in photopolymer layer by circuitous pattern video picture out.
S310, etched circuit circuit, use copper etchant solution to etch out the copper film layer circuit-line in non-tactile district, then uses indium tin oxide films etching solution to etch out by the telegraph circuit of Petting Area.
S311, coating antioxidation coating, after having etched circuit-line, use liquid parting the dry film eccysis of upper surface overlaying on copper film circuit layer and indium tin oxide films conductive layer, then be coated with and be covered with antioxidation coating, the circuit on copper film layer and indium tin oxide films ITO conductive layer is covered in touch panel middle layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410054917.XA CN104850281A (en) | 2014-02-18 | 2014-02-18 | Production process for capacitive touch screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410054917.XA CN104850281A (en) | 2014-02-18 | 2014-02-18 | Production process for capacitive touch screen |
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| CN104850281A true CN104850281A (en) | 2015-08-19 |
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| CN201410054917.XA Pending CN104850281A (en) | 2014-02-18 | 2014-02-18 | Production process for capacitive touch screen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105824467A (en) * | 2016-03-16 | 2016-08-03 | 牧东光电科技有限公司 | Large-window touch panel and manufacturing method thereof |
| WO2017152509A1 (en) * | 2016-03-08 | 2017-09-14 | 意力(广州)电子科技有限公司 | Lap joint process of frame area circuit and window area circuit, and touch screen |
| WO2018028037A1 (en) * | 2016-08-10 | 2018-02-15 | 意力(广州)电子科技有限公司 | Touch screen copper processing method, and touch screen |
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Patent Citations (7)
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| CN101726888A (en) * | 2008-10-27 | 2010-06-09 | 宸鸿光电科技股份有限公司 | Fabricating method of touch circuit two-sided graph structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017152509A1 (en) * | 2016-03-08 | 2017-09-14 | 意力(广州)电子科技有限公司 | Lap joint process of frame area circuit and window area circuit, and touch screen |
| CN105824467A (en) * | 2016-03-16 | 2016-08-03 | 牧东光电科技有限公司 | Large-window touch panel and manufacturing method thereof |
| WO2018028037A1 (en) * | 2016-08-10 | 2018-02-15 | 意力(广州)电子科技有限公司 | Touch screen copper processing method, and touch screen |
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Application publication date: 20150819 |