A kind of touch-screen grid type electrode
Technical field
The utility model relates to touch-screen, relates in particular to a kind of touch-screen grid type electrode.
Background technology
Indium tin oxide target or fluorine-doped tin dioxide are in the time of filminess, and the characteristic such as electricity conduction and optical clear having is widely used it in touch-screen field.
Along with market constantly increases the demand of large scale touch-screen, researchist starts to consider how to reduce or offset the negative consequence that increases the electrode resistance increase bringing because of screen size.One of method is to adjust the ratio of tin in indium tin oxide target or fluorine-doped tin dioxide, but resize ratio can not deal with problems completely, in reducing resistivity, transmittance has also declined conventionally, when light transmission strengthens, resistivity has risen again.
Therefore researchist has turned to research emphasis with metal grill replacement indium tin oxide target or fluorine-doped tin dioxide, specific practice is directly the metal materials such as silver, aluminium or copper to be adopted to silk screen printing process, comprise embossing plate technology, and the mode of volume to volume is produced on transparent substrate.
In order to ensure the transmittance of grid type electrode, must lighttight metal wire be done very carefully, such as being less than 5 microns.Traditional silk screen printing process, comprises embossing plate technology, and the production method of volume to volume cannot meet such requirement, and too tiny metal live width sharply declines the yields of traditional handicraft.
And on the other hand, the metal material that can be used in Photolithography Technology is more expensive, and the lithographic equipment in existing touch screen field is also difficult to realize tiny metal live width, and has the problem of the not good and oxidation of adhesion.
Therefore, those skilled in the art is devoted to develop a kind of touch-screen grid type electrode, makes it have low resistivity simultaneously, higher light transmittance, and manufacturing process yields is high, and performance reliability is high, and material is more cheap, good economy performance.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved in the utility model is to provide a kind of touch-screen and good economy performance, metal grill that reliability is high of can be applicable to.
For achieving the above object, the utility model provides a kind of touch-screen grid type electrode, comprise transparency carrier, indium tin oxide target or fluorine-doped tin dioxide layer, nickel dam and gold layer, wherein indium tin oxide target or fluorine-doped tin dioxide layer are positioned on the first surface of substrate, nickel dam is positioned on indium tin oxide target or fluorine-doped tin dioxide layer, gold layer is positioned on nickel dam, and indium tin oxide target or fluorine-doped tin dioxide layer, nickel dam and gold layer are mesh shapes.
Further, indium tin oxide target or fluorine-doped tin dioxide layer, nickel dam and gold layer institute to have shape be a kind of circle or polygon.
Further, the shape of indium tin oxide target or fluorine-doped tin dioxide layer, nickel dam and golden layer is identical, is vertically superimposed.
Further, described circle or polygonal mesh are random being connected, and size is also random.
Further, substrate thickness is 20-2000 micron.
Further, indium tin oxide target or fluorine-doped tin dioxide layer thickness are that 2-80 nanometer, width are less than 12 microns.
Further, nickel layer thickness is 10 nanometers to 1.5 micron.
Further, golden layer thickness is 2-80 nanometer.
Further, grid type electrode random being connected on the first surface of substrate distributes, and is covered with the tangible region of whole touch-screen.
Further, indium tin oxide target or fluorine-doped tin dioxide layer dutycycle are less than 20%, and dutycycle refers to and on the first surface of substrate, has the region area of described indium tin oxide target or fluorine-doped tin dioxide layer and do not have described indium tin oxide target or the ratio of the region area of fluorine-doped tin dioxide layer.
The resistance of touch-screen grid type electrode is determined by gold layer substantially, and gold is the conductor that electric conductivity is very excellent.Thereby this metal grill can be applied to touch-screen and make, large-sized touch-screen in comprising.In addition, the sputter that the utility model uses, photoetching, chemical nickel plating, chemical gilding is all maturation process, can batch jobs, production efficiency is high, and yields is high.In addition, owing to only having the ground gold-plated and nickel just now of grid, gold used and the specific consumption of nickel are very small, are conducive to save production cost.
Below with reference to accompanying drawing, the technique effect of design of the present utility model, concrete structure and generation is described further, to understand fully the purpose of this utility model, feature and effect.
Brief description of the drawings
Fig. 1 is the longitudinal sectional drawing of a preferred embodiment of the present utility model
Fig. 2 is the planimetric map of a preferred embodiment of the present utility model
Embodiment
In preferred embodiments of the present utility model, as Fig. 1, touch-screen grid type electrode is by transparency carrier 100, indium tin oxide target or fluorine-doped tin dioxide layer 101, nickel dam 102 and gold layer 103 composition.Described indium tin oxide target or fluorine-doped tin dioxide layer are positioned on described transparency carrier first surface, described nickel dam is positioned on described indium tin oxide target or fluorine-doped tin dioxide layer, described gold layer is positioned on described nickel dam, from Vertical Square always, described indium tin oxide target or fluorine-doped tin dioxide layer, together with described nickel dam overlaps with described gold layer, described indium tin oxide target or fluorine-doped tin dioxide layer, described nickel dam has formed an effigurate grid being connected of tool with described gold layer, described definite shape can be the polygon in Fig. 2, can be also circular.Connected grid has like this formed the induction electrode of touch-screen.Effectively reduce the overall resistivity of grid type electrode by additional making nickel dam and gold layer on the circle at guarantee transmittance or polygon indium tin oxide target or fluorine-doped tin dioxide grid type electrode, solve the in the situation that of large scale touch-screen, grid type electrode resistance is excessive, affects touch-screen and obtains the problem of finger contact position.
Above, the embodiment of the connected grid to definite shape of the present utility model is illustrated.But the embodiment of the connected grid of definite shape of the present utility model is not limited to aforesaid way.The mode of the various distortion that also can carry out with those skilled in the art, the mode of improvement are implemented.
More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all technician in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in by the determined protection domain of claims.