CN103092452A - Capacitive touch screen and manufacturing method thereof and touch display screen - Google Patents
Capacitive touch screen and manufacturing method thereof and touch display screen Download PDFInfo
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- CN103092452A CN103092452A CN2013100329512A CN201310032951A CN103092452A CN 103092452 A CN103092452 A CN 103092452A CN 2013100329512 A CN2013100329512 A CN 2013100329512A CN 201310032951 A CN201310032951 A CN 201310032951A CN 103092452 A CN103092452 A CN 103092452A
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Abstract
The invention discloses a capacitive touch screen and a manufacturing method of the capacitance touch screen and a touch display screen, and relates to the field of displaying. Pattern clearances of a transparent conducting layer can be reduced, and then surface visual effects are improved. The capacitive touch screen comprises a transparent substrate and a patterned transparent conducting layer, the transparent conducting layer comprises a first sense line extending along a first direction and a second sense line extending along a second direction, wherein the first sense line is maintained continuous in the first direction and is a cluster of electrodes which are connected in sequence, the second sense line comprises a plurality of independent electrodes which are separated from one another, and the independent electrodes are connected with one another through bridging the first sense line. The gaps between the electrodes in the first sense line and the independent electrodes of the second sense line are not filled with any material or filled with transparent insulating material, wherein the dielectric constant of the transparent insulating material is larger than or equal to 1 and less than 3.5, so that the width of the gaps can be reduced on the premise that touch sensitivity is not affected.
Description
Technical field
The present invention relates to the demonstration field, relate in particular to a kind of capacitance touch screen and preparation method thereof and touch display unit.
Background technology
The touch screen LCD development has developed into the main flow flat-panel monitor rapidly gradually.Distinguish from know-why, touch screen LCD can be divided into: vector pressure sensing, resistance sensing, capacitance sensing, infrared ray sensing and five kinds of fundamental types of surface acoustic wave sensing, and divide by structure and developed into external hanging type (Add on mode), embedded (On cell mode) and monoblock type (In cell mode) three types.
A kind of common external hanging type capacitance touch screen as shown in Figure 1, be disposed with from bottom to top on transparency carrier 10: metal level 11, insulation course 12, transparency conducting layer 13 and transparent sealer 14 need the preparation of 4 photoetching (4Mask) technique, comprising: the first step, evaporation metal, carry out etching through exposure, put up a bridge 111 at the metal of touch-screen viewing area formation directions X, form metal routings 112 in pressing regional 20; Second step is coated with insulating layer coating 12 (Insulator) and the etching of exposing, at metal bridging 111 two ends formation via holes; The 3rd step, evaporation ITO, and expose, the etching figure, directions X in the viewing area forms the absolute electrode 132a of mutual disconnection, form a string mutual direct-connected continuous electrode group in Y-direction, simultaneously 20 form the ITO layers in the pressing zone, avoid the metal routing 112 in pressing zone 20 to be exposed to the surface oxidized; The 4th step applied the sealer (PVX) 14 of insulation transparent, and reserved pressing zone 20.Wherein, the direct-connected continuous electrode group of Y-direction is the first sense line 131, and the absolute electrode 133 of directions X is put up a bridge by metal and 111 interconnected, and strides across the first sense line 131, forms the second sense line 132.When a certain sense line is driven, another sense line namely obtains inductance capacitance, finger (or other objects) near or when touching, the electric capacity between near the first sense line 131 that intersects the touch point and the second sense line 132 can be affected, just the position of touch point can be identified by the capacitance variations that detects sense line.
The inventor finds the structural design of existing touch-screen, and there are the following problems at least:
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of capacitance touch screen and preparation method thereof and touch display unit, can reduce the pattern interval of transparency conducting layer, and then improves surperficial visual effect.
On the one hand, the invention provides a kind of capacitance touch screen, comprising: the transparency conducting layer of transparency carrier and patterning, described transparency conducting layer comprise along the first sense line of first direction extension and the second sense line that extends along second direction;
Wherein, described the first sense line keeps continuously at described first direction, is a string electrode that connects successively, and described the second sense line comprises a plurality of absolute electrodes that are separated from each other, and described absolute electrode adopts the bridging mode to stride across described the first sense line to interconnect;
Gap between absolute electrode in described the first sense line and the absolute electrode of described the second sense line, do not fill any material or be filled with specific inductive capacity more than or equal to 1, and be no more than 3.5 transparent insulation material, with under the prerequisite that does not affect touch sensitivity, reduce described gap width.
Further, described capacitance touch screen also comprises: have the transparent sealer of identical figure with described transparency conducting layer, cover on described transparency conducting layer.
Alternatively, described transparent insulation material is optical cement.
Further, described capacitance touch screen also comprises: the metal level of patterning, and described metal level is arranged on described transparency carrier, and is positioned at the below of described transparency conducting layer;
Described metal level further comprises: be positioned at the viewing area of described capacitance touch screen and put up a bridge along the spaced apart a plurality of metals of described the second sense line, and the metal routing that is positioned at the pressing zone of described capacitance touch screen, described metal is put up a bridge and is arranged at the below that described absolute electrode interconnects the place, and described absolute electrode is interconnected to form described the second sense line.
Further, described capacitance touch screen also comprises insulation course, and described insulation course is covered on described metal level, and is respectively arranged with via hole at the two ends that arbitrary described metal is put up a bridge;
Described transparency conducting layer is positioned on described metal level, and fills described via hole to downward-extension;
Described absolute electrode is put up a bridge by the transparent conductive material in described via hole and described metal and is interconnected, and forms described the second sense line.
Described capacitance touch screen also comprises the second transparency conducting layer that has identical figure with described metal level, and described the second transparency conducting layer is covered on described metal bridging and described metal routing;
Described absolute electrode is put up a bridge by the metal that is coated with described the second transparency conducting layer and is interconnected, and forms described the second sense line.
Alternatively, the electrode of described the first sense line assumes diamond in shape, and the absolute electrode of described the second sense line also assumes diamond in shape.
The present invention also provides a kind of touch display unit, is provided with described arbitrary capacitance touch screen.
On the other hand, the present invention also provides a kind of method for making of capacitance touch screen, comprising:
Make described metal level and described the second transparency conducting layer on transparency carrier, adopt composition technique to form some groups of bridgings in the viewing area of described capacitance touch screen, pressing zone formation metal routing at described capacitance touch screen, also form simultaneously the electrically conducting transparent figure of identical patterns, be covered on described bridging and described metal routing, wherein, the described bridging of each group comprises a plurality of along the spaced apart metal bridging of second direction;
Make insulation course, adopt composition technique at the two ends that arbitrary described metal is put up a bridge, via hole to be set respectively, make described the second transparency conducting layer that covers in described metal bridging in the place's exposure of described via hole;
Make described transparency conducting layer and transparent sealer, described transparency conducting layer is filled described via hole at the via hole place of described insulation course to downward-extension, and described transparency conducting layer is put up a bridge by the metal that the transparent conductive material in described via hole is connected to the below;
adopt composition technique to form identical patterned layer on described transparency conducting layer and described sealer, comprise: along the first sense line of first direction extension and the second sense line that extends along second direction, wherein, described the first sense line is a string electrode that connects successively, keep continuously at described first direction, each described second sense line correspondence is positioned at the top that one group of described metal is put up a bridge, each described second sense line comprises a plurality of absolute electrodes, be separately positioned on the top in any two adjacent metal bridging gaps in corresponding metal bridging group, described absolute electrode is put up a bridge by the described metal of below and is striden across described the first sense line and interconnect, form described the second sense line.
Capacitance touch screen of the present invention and touch display unit, the first sense line and the second sense line are positioned at same transparency conducting layer, the realization of its touch function depends on the electric capacity between the first sense line and the second sense line, and the gap width positive correlation between the electrode of absolute electrode and the second sense line in the size of this electric capacity and the first sense line, and the DIELECTRIC CONSTANT ε of megohmite insulant between the gap
rNegative sense closes, and does not therefore fill any material in the gap of the first sense line and the second sense line (pattern interval of transparency conducting layer) or fills DIELECTRIC CONSTANT ε
rLittle transparent insulation material (1≤ε
r≤ 3.5), can reduce the pattern interval of transparency conducting layer under the prerequisite that does not affect touch sensitivity (electric capacity), thereby improve surperficial visual effect.
The manufacture method of described capacitance touch screen provided by the invention, transparency conducting layer is identical with the surface protection layer pattern, can synchronously complete, save the Mask processing step one time, therefore adopt 3Mask technique to complete, relatively existing 4Mask technique, processing step reduces, thereby enhance productivity, the expense that reduces production costs, and product reliability improves; Simultaneously, also can dwindle the pattern interval of transparency conducting layer, and then improve visual effect.
Description of drawings
Fig. 1 is a kind of structural representation of existing capacitance touch screen;
The structural representation one of the capacitance touch screen that Fig. 2 embodiment of the present invention one provides;
Fig. 3 is the structural representation of the transparency conducting layer of the embodiment of the present invention one capacitance touch screen;
Fig. 4 is the work schematic diagram of capacitance touch screen;
The structural representation two of the capacitance touch screen that Fig. 5 provides for the embodiment of the present invention one;
The method for making process flow diagram of the capacitance touch screen that Fig. 6 embodiment of the present invention two provides;
The pattern of metal level in Fig. 7 embodiment of the present invention two;
Insulating layer pattern in Fig. 8 embodiment of the present invention two.
Description of reference numerals
The 10-transparency carrier, the 11-metal level, the 12-insulation course, the 13-transparency conducting layer,
The 14-sealer, 15-the second transparency conducting layer, the 20-pressing is regional, the 21-flexible PCB,
The 111-metal is put up a bridge, the 112-metal routing, and the 121-via hole, 131-the first sense line,
132-the second sense line, the 132a-absolute electrode.
Embodiment
The embodiment of the present invention provides a kind of capacitance touch screen and preparation method thereof and touch display unit, can reduce the pattern interval of transparency conducting layer, and then improves surperficial visual effect.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.Embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Embodiment one
The embodiment of the present invention provides a kind of capacitance touch screen, as shown in Figures 2 and 3, comprise: the transparency conducting layer 13 of transparency carrier 10 and patterning, described transparency conducting layer 13 is arranged on transparency carrier 10, comprise: the first sense line 131 that extends along first direction (as shown in FIG. vertically) and along second direction (as with vertically perpendicular laterally) the second sense line 132 of extending
Wherein, the first sense line 131 keeps continuously at first direction, is a string electrode that connects successively, and the second sense line 132 comprises a plurality of absolute electrode 132a that are separated from each other, and absolute electrode 132a adopts the bridging mode to stride across the first sense line 131 to interconnect;
Gap d between absolute electrode 132a in the first sense line 131 and the electrode of the second sense line 132, do not fill any material or fill specific inductive capacity more than or equal to 1, and be no more than 3.5 transparent insulation material, with under the prerequisite that does not affect touch sensitivity, reduce described gap width d.
Number to the first sense line 131 and the second sense line 132 in the present embodiment is not all done restriction, and the first sense line 131 and the second sense line 132 are crisscross, and in the staggered place, the second sense line 132 adopts the bridging mode to stride across the first sense line 131.
Alternatively, the absolute electrode 132a of the electrode of the present embodiment the first sense line 131 and the second sense line 132 all can be rhombus or triangle, but does not also get rid of other shape.Preferably, the pattern that the first sense line 131 shown in Figure 3 connects and composes successively for a plurality of rhombuses, the second sense line 132 are the pattern of the rhombus formation of a plurality of mutual disconnections.
As shown in Figure 4, capacitance touch screen, the realization of its touch function depends on the electric capacity between the absolute electrode 132a of the electrode of the first sense line 131 and the second sense line 132, this electric capacity can equivalence for two parts electric capacity: a part is to result from the electrode of the first sense line 131 and the capacitor C p1 between absolute electrode 132a right opposite (electric field line that represents with the straight line of arrow in corresponding diagram), and this part electric capacity is major part; Another part is the capacitor C p2 (electric field line in corresponding diagram shown in curve) that results from the absolute electrode 132a outer space of the electrode of the first sense line 131 and the second sense line 132.If establishing the electric capacity change amount that when touching, finger causes is Cp0 (electric field line that the corresponding diagram cathetus represents), finger dexterity can be expressed as roughly: touch sensitivity Q=Cp0/ (Cp1+Cp2).This ratio is larger, the larger Q of touch sensitivity.In existing capacitive touch screen structural design, the material that the electrode gap of the first sense line and the second sense line (pattern interval of transparency conducting layer) is filled is SiN
x, its specific inductive capacity is 6.5 and (perhaps is SiO
2, its relative dielectric constant is 3.9; Be perhaps resin material, relative dielectric constant is generally 3.2～3.5), pattern interval width d is generally 30～50 microns, if further reduce pattern interval width d, Cp1 increases, and causes touch sensitivity Q to reduce, and finger goes touch-control may cause touch-control malfunctioning again.
For this problem, in the embodiment of the present invention, the electrode gap of the first sense line and the second sense line (pattern interval of transparency conducting layer) is not filled any material or is filled DIELECTRIC CONSTANT ε
rLittle transparent insulation material (1≤ε
r≤ 3.5).Under the prerequisite that does not change touch sensitivity (capacitor C p1 and Cp2 are substantially constant), the electrode gap of the first sense line 131 and the second sense line 132 (pattern interval of transparency conducting layer) can be reduced to 1/6.5 original～3.5/6.5, namely approximately 4.6～16.2 microns, reach the purpose of improving visual effect.In the original capacitive touch screen structural design of this hypothesis, that fills between the gap is the SiN of sealer
x(perhaps SiO
2).
for example, when not filling any material, can think when the material of filling is air, the specific inductive capacity of air is 1, therefore capacitor C p1 and Cp2 sum are about 1/6.5 left and right of conventional value, under the prerequisite that does not change touch sensitivity (capacitor C p1 and Cp2 are substantially constant), the electrode gap of the first sense line 131 and the second sense line 132 (pattern interval of transparency conducting layer) can be reduced at most original 1/6.5, namely approximately 4.6 microns, and 4～5 microns Limiting Levels that basically also reached existing technique, like this human eye just can not identification icon the gap, thereby drop to the visual impact that pattern interval brings minimum.
Must note, if the capacitance touch screen of Glass To Glass structure, in concrete enforcement, need to apply optical cement OCA when post-production, to adhere to cover plate (top layer glass), therefore the pattern interval of transparency conducting layer may be filled optical cement OCA, is perhaps part optical cement OCA and part air (optical cement OCA does not fill fully).The specific inductive capacity of optical cement OCA is 1.5, consider that optical cement OCA may not fill fully, therefore can think the specific inductive capacity of pattern interval transparent insulation material this moment between 1～1.5, the pattern interval of transparency conducting layer can be reduced to original 1.25/6.5 left and right (supposing that between the gap of original capacitive touch screen, filling material is SiNx).
Further, as shown in Figure 5, described capacitance touch screen also comprises: have the transparent sealer 14 of identical figure with transparency conducting layer 13, cover on transparency conducting layer 13.Transparent sealer 14 has identical figure with transparency conducting layer 13, can be by synchronously completing with an operation when using composition technique to make.In concrete enforcement, after producing transparency conducting layer 13 and sealer 14, adopt a photoetching process to complete, only need to use a mask plate in photoetching process.
The described capacitance touch screen of the present embodiment can save the composition processing step one time when making, therefore can enhance productivity, and the expense that reduces production costs, because processing step reduces, product reliability also is improved simultaneously.
Wherein, described capacitance touch screen also comprises: the metal level 11 of patterning, and metal level 11 is arranged on transparency carrier 10, and is positioned at the below of transparency conducting layer 13; Metal level 11 further comprises: be positioned at capacitance touch screen the viewing area put up a bridge 111 and be positioned at the metal routing 112 in the pressing zone 20 of capacitance touch screen along the spaced apart a plurality of metals of the second sense line, metal bridging 111 is arranged at the below that absolute electrode 132a interconnects the place, and absolute electrode 132a is interconnected to form the second sense line 132.
Further, described capacitance touch screen also comprises: insulation course 12 is covered on metal level 11, and is respectively arranged with via hole 121 at the two ends of arbitrary metal bridging 111; Transparency conducting layer 13 is positioned on metal level 11, and to downward-extension filled vias 121, absolute electrode 132a interconnects by the transparent conductive material in via hole 121 and metal bridging 111, forms the second sense line 132.
Described capacitance touch screen also comprises: have the second transparency conducting layer 15 of identical figure with metal level 11, be covered in metal put up a bridge 111 and metal routing 112 on; Absolute electrode 132a interconnects by the metal bridging 111 that is coated with the second transparency conducting layer 15, forms the second sense line 132.
Herein; the reason of metal level 11 surface preparation the second transparency conducting layers 15 is: because sealer 14 and transparency conducting layer 13 have identical patterns; therefore for ease of being connected with outside by flexible PCB 21; transparency conducting layer 13 in pressing zone 20 without figure; being exposed to the surface for the pressing of avoiding metal level is regional with other zones may be oxidized; thereby change its Resistance Influence touch function; need to prepare the second transparency conducting layer 15 with identical figure on metal level 11, be covered on metal bridging 111 and metal routing 112.
The structural design of existing capacitance touch screen, need adopt 4Mask technique during production, and capacitance touch screen of the present invention only need adopt 3Mask technique to complete, when therefore capacitive touch screen of the present invention prepares, processing step is few, production efficiency is high, production cost is minimized, and product reliability improves; Simultaneously, also can dwindle the pattern interval of transparency conducting layer under the prerequisite that does not affect touch sensitivity (electric capacity), and then improve visual effect.
The embodiment of the present invention also provides a kind of touch display unit, and it is provided with described arbitrary touch-screen, and cost is lower, and display effect is better.Described touch display unit can be any product or parts that need to touch Presentation Function such as liquid crystal panel, Electronic Paper, oled panel, mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.
Embodiment two
The present invention also provides a kind of method for making of capacitance touch screen; with reference to figure 2～5; described touch-screen comprises: transparency carrier 10; be successively set on sealer transparent on transparency carrier 10 14, transparency conducting layer 13, insulation course 12, the second transparency conducting layer 15 and metal level 11 from top to bottom; as shown in Figure 6, the method comprises:
In this step, make metal level 11 and the second transparency conducting layer (ITO layer) 15 on transparency carrier 10, then etching simultaneously, second direction (in figure laterally) forms that metal is put up a bridge and the ITO bridging, so that the first sense line is along first direction, the second sense line is along second direction conducting separately, and forms metal routing figure and the second transparency conducting layer 15 in pressing zone 20 (Bonding).
Apply and make insulation course figure (Insulator) in this step, and adopt composition technique at the two ends of arbitrary metal bridging 111, via hole 121 to be set respectively, metal bridging 111 and second transparency conducting layer 15 of lower floor is exposed, be convenient to the transparency conducting layer 13 of next step preparation in the conducting of second direction.Reserve pressing zone 20 in this step, namely there is not insulation course 12 in pressing zone 20.
adopt composition technique to form identical patterned layer on transparency conducting layer 13 and sealer 14, as Fig. 5 and shown in Figure 3, comprise: along the first sense line 131 of first direction extension and the second sense line 132 that extends along second direction, wherein, the first sense line 131 is a string electrode that connects successively, keep continuously at first direction, each second sense line 132 correspondence is positioned at the top that one group of metal is put up a bridge, each second sense line 132 comprises a plurality of absolute electrode 132a, be separately positioned on the top of any two adjacent metals bridging 111 gap locations in corresponding metal bridging group, the metal of absolute electrode 132a by the below put up a bridge and 111 striden across the first sense line 131 and interconnect, form the second sense line 132.
In this step, make transparency conducting layer 13 and sealer 14, then the while etching, form the first continuous sense line 131 at first direction; Put up a bridge corresponding to the metal of respectively organizing of making in step 101, form many group absolute electrode 132a in second direction, each absolute electrode 132a is arranged on the top in any two adjacent metal bridging 111 gaps in corresponding metal bridging group, make absolute electrode 132a by insulation course 12 via holes at two ends, be connected with metal bridging 111 and second transparency conducting layer 15 of lower floor, thereby absolute electrode 132a is interconnected along first direction, form the second sense line 132.
In addition, need reserve pressing zone 20 in this step, namely pressing zone 20 does not exist transparency conducting layer 13 and sealer 14 yet.
The manufacture method of described capacitance touch screen provided by the invention adopts 3Mask technique to complete, relatively existing 4Mask technique, and processing step reduces, thereby has improved production efficiency, the expense that reduces production costs, and product reliability improves; Simultaneously, also can dwindle the pattern interval of transparency conducting layer, and then improve visual effect.
Capacitance touch screen for Glass To Glass structure; also need apply optical cement OCA and adhere to cover plate (top layer glass) on sealer 14; therefore the pattern interval of transparency conducting layer also may be filled optical cement OCA, is perhaps part optical cement OCA and part air (optical cement OCA does not fill fully).The specific inductive capacity of optical cement OCA is 1.5, can think the specific inductive capacity of pattern interval megohmite insulant transparent insulation material this moment between 1～1.5, the pattern interval of transparency conducting layer can be original 1.25/6.5 left and right and (supposes that between the gap of original capacitive touch screen, filling material is SiN
x).
Should be noted: though the present invention take the external hanging type capacitance touch screen as example, those skilled in the art's application of the present invention as can be known are not limited to this, also can be used for embedded (On Cell) touch display unit.
In addition, application of the present invention also is not limited to Glass To Glass structure, also can be applied to the structures such as OGS, and wherein said Glass To Glass structure refers to that touch sensing is made on ito glass, and skin adds a slice cover glass (cover plate); Described OGS (One glass solution) structure refers to directly form ITO conducting film and sensor on cover glass, and a glass plays the double action of cover glass and touch sensor simultaneously.
The described technical characterictic of the embodiment of the present invention in the situation that do not conflict, can be used in combination arbitrarily mutually.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection domain with claim.
Claims (9)
1. a capacitance touch screen, is characterized in that, comprising: the transparency conducting layer of transparency carrier and patterning, described transparency conducting layer comprise along the first sense line of first direction extension and the second sense line that extends along second direction;
Wherein, described the first sense line keeps continuously at described first direction, is a string electrode that connects successively, and described the second sense line comprises a plurality of absolute electrodes that are separated from each other, and described absolute electrode adopts the bridging mode to stride across described the first sense line to interconnect;
Gap between electrode in described the first sense line and the absolute electrode of described the second sense line is not filled any material or fills specific inductive capacity more than or equal to 1 and be no more than 3.5 transparent insulation material.
2. capacitance touch screen according to claim 1, is characterized in that, described capacitance touch screen also comprises: have the transparent sealer of identical figure with described transparency conducting layer, cover on described transparency conducting layer.
3. capacitance touch screen according to claim 1 and 2, is characterized in that,
Described transparent insulation material is optical cement.
4. according to claim 1-3 described capacitance touch screens of any one, is characterized in that, described capacitance touch screen also comprises the metal level of patterning, and described metal level is arranged on described transparency carrier and is positioned at the below of described transparency conducting layer;
Described metal level further comprises: be positioned at the viewing area of described capacitance touch screen and put up a bridge along the spaced apart a plurality of metals of described the second sense line, and the metal routing that is positioned at the pressing zone of described capacitance touch screen, described metal is put up a bridge and is arranged at the below that described absolute electrode interconnects the place, and described absolute electrode is interconnected to form described the second sense line.
5. capacitance touch screen according to claim 4, is characterized in that, described capacitance touch screen also comprises insulation course, and described insulation course is covered on described metal level, and be respectively arranged with via hole at the two ends that arbitrary described metal is put up a bridge;
Described transparency conducting layer is positioned on described metal level, and fills described via hole to downward-extension;
Described absolute electrode is put up a bridge by the transparent conductive material in described via hole and described metal and is interconnected, and forms described the second sense line.
6. capacitance touch screen according to claim 5, it is characterized in that, described capacitance touch screen also comprises the second transparency conducting layer that has identical figure with described metal level, and described the second transparency conducting layer is covered on described metal bridging and described metal routing;
Described absolute electrode is put up a bridge by the metal that is coated with described the second transparency conducting layer and is interconnected, and forms described the second sense line.
7. according to claim 1-6 described capacitance touch screens of any one, is characterized in that, the electrode of described the first sense line assumes diamond in shape, and the absolute electrode of described the second sense line also assumes diamond in shape.
8. a touch display unit, is characterized in that, is provided with the described capacitance touch screen of claim 1-7 any one.
9. the method for making of a capacitance touch screen, is characterized in that, comprising:
Make described metal level and described the second transparency conducting layer on transparency carrier, adopt composition technique to form some groups of bridgings in the viewing area of described capacitance touch screen, pressing zone formation metal routing at described capacitance touch screen, also form simultaneously the electrically conducting transparent figure of identical patterns, be covered on described bridging and described metal routing, wherein, the described bridging of each group comprises a plurality of along the spaced apart metal bridging of second direction;
Make insulation course, adopt composition technique at the two ends that arbitrary described metal is put up a bridge, via hole to be set respectively, make described the second transparency conducting layer that covers in described metal bridging in the place's exposure of described via hole;
Make described transparency conducting layer and transparent sealer, described transparency conducting layer is filled described via hole at the via hole place of described insulation course to downward-extension, and described transparency conducting layer is put up a bridge by the metal that the transparent conductive material in described via hole is connected to the below;
adopt composition technique to form identical patterned layer on described transparency conducting layer and described sealer, comprise: along the first sense line of first direction extension and the second sense line that extends along second direction, wherein, described the first sense line is a string electrode that connects successively, keep continuously at described first direction, each described second sense line correspondence is positioned at the top that one group of described metal is put up a bridge, each described second sense line comprises a plurality of absolute electrodes, be separately positioned on the top in any two adjacent metal bridging gaps in corresponding metal bridging group, described absolute electrode is put up a bridge by the described metal of below and is striden across described the first sense line and interconnect, form described the second sense line.
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| CN108304092A (en) * | 2018-01-30 | 2018-07-20 | 云谷（固安）科技有限公司 | A kind of preparation method of touch base plate, touch base plate and display device |
| CN108845726A (en) * | 2018-08-29 | 2018-11-20 | 信元光电有限公司 | A kind of production method and touch screen of touch screen |
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