CN101719044A

CN101719044A - Capacitive touch screen and manufacturing method thereof

Info

Publication number: CN101719044A
Application number: CN201010017245A
Authority: CN
Inventors: 余多斌
Original assignee: Suzhou Pixcir Microelectronics Co Ltd
Current assignee: Suzhou Pixcir Microelectronics Co Ltd
Priority date: 2010-01-05
Filing date: 2010-01-05
Publication date: 2010-06-02

Abstract

The invention provides a capacitive touch screen and a manufacturing method thereof. Two baseplates are provided with a layer of an ITO electrode respectively; and one side with the electrode layer of the baseplate is adhered to one side with the electrode layer of the other baseplate through an adhesive coating. The capacitive touch screen and the manufacturing method thereof have the advantages of simpler structure and process; moreover, because part of materials and processing steps are also reduced based on a traditional structure and a traditional process, a needed electrode pattern can be obtained through once etching; and production processes and a mould used in production can be effectively reduced so as to effectively reduce cost.

Description

A kind of capacitance type touch control screen and manufacture method thereof

Technical field

The present invention relates to a kind of touch screen and manufacture method thereof, refer in particular to capacitance type touch control screen with its manufacture method.

Background technology

Continuous development along with electronic technology, can be used for continuously touch screen hand-written and the multiple spot input and more and more be subjected to making a pet of of people, not only because it is simple to operate, beyond the functional diversity and its price also descend gradually, usually, touch-screen generally comprises a contact panel, a controller and a software driver, wherein contact panel is the transparent panel that has touch sensitive surface, generally be positioned at the front of display screen, the viewing area of display screen that made touch-sensitive surface covers, contact panel record touch event, and touch signal is sent to controller, by controller computer system is sent in these information processings again, at last, software driver is translated into the computing machine incident to touch event.

At present, in the touch technology field, generally be to have applied a kind of material that can stored charge on the contact panel, this material need possess the good and higher feature of transparency of electric conductivity simultaneously, as ITO (being commonly called as indium tin oxide), usually need be on panel applied in two coats, a kind of mode is two-sided bilayer, promptly the upper and lower surface at panel all respectively covers one deck ITO, and another kind of mode is a single-surface double-layer, promptly only covers two-layer ITO on the one side of panel, wherein, has insulation course between the two-layer ITO, no matter be which kind of mode, among the two-layer ITO, one deck is the ITO electrode matrix of directions X, one deck is the ITO electrode matrix of Y direction, during operation, changes by monitoring the signal that occurs on each electrode, position and amplitude that the signal variation occurs just can help to discern touch event.Realize all these functions, all need two-layer ITO is fitted in accurately on the corresponding panel and could realizes, and when two-layer applying, will inevitably run into the low problem of binding yield, can cause the increase of cost so virtually.

Therefore need be for the user provides a kind of capacitance type touch control screen structure that reduces cost, to solve existing problem.

Summary of the invention

The actual technical matters to be solved of the present invention is how to provide a kind of, touch screen that cost lower simpler than existing structure with its manufacture method.

In order to realize above-mentioned purpose of the present invention, the invention provides a kind of capacitance type touch control screen, it comprises first substrate and second substrate and bonding coat, wherein bonding mutually between first substrate and second substrate by bonding coat, be laid with one deck ITO on described first substrate, the side near bonding coat on described second substrate also is laid with one deck ITO.

Simultaneously, the present invention also provides the method for making this touch screen, and it may further comprise the steps: (a) utilize exposure imaging technology to lay the high-precision ITO electrode layer of one deck on first substrate; (b) utilize screen printing technique on second substrate, described second substrate that will have whole transparency electrode carries out the serigraphy mask, and etching is to obtain electrode pattern ITO electrode layer then; (c) utilize bonding coat that first substrate and second substrate that are laid with the ITO electrode layer respectively is bonding mutually.

Touch screen of the present invention and manufacture method thereof, not only structure, processing step are simpler, and because it is on traditional structure, technology, part material and processing step have been reduced again, just can obtain needed electrode pattern by an etching, effectively reduced employed mould in production process and the production, so effectively reduced cost.

Description of drawings

Fig. 1 is the structural representation of capacitance type touch control screen of the present invention.

Embodiment

The present invention is further illustrated below in conjunction with drawings and Examples.

See also shown in Figure 1, touch screen 1, comprise that contact panel is as first substrate 10, be laid with a vertical or horizontal ITO layer 11 on this first substrate 10, above this ITO layer 11, be coated with a bonding coat 12, second substrate 13 is provided with ITO layer 14 near a side of bonding coat 12, and the ITO layer 11 on this ITO layer 14 and first substrate 10 is the staggered shape of arranging.

See also shown in Figure 2, described first substrate 10, comparatively commonly adopt at present the glass material of transparence, as glassy substrate or macromolecule material, has an ITO layer 11 on it, because only attached one deck ITO on it, so just can obtain needed electrode pattern by an etching, this ITO layer 14 can vertical or transversely arranged setting.

Described bonding coat 12 can adopt the base material that has transparent conductive film that has processed, utilize silk-screen printing technique, the printing photoresistance just can obtain needed conductive pattern after the etching, and bonding coat 12 can play the effect that bonding described first substrate is connected with described second substrate.

Described second substrate 13 is a film like, its material can be preferably glass of plastics or thinner thickness or the like, on described second substrate 13, also be provided with an ITO layer 14, because it is also only with one deck ITO, so also can only just can obtain needed electrode pattern by an etching, the ITO layer 14 of this moment need be arranged on the side near bonding coat 12, and the ITO layer 11 on the arrangement of ITO layer and described first substrate 10 be arranged as staggered form, when the ITO layer 11 on even described first substrate 10 was transversely arranged, the ITO layer 14 on described second substrate 13 just was vertically to arrange; In like manner, when being vertically arrangement as if the ITO layer 11 on described first substrate 10, the ITO layer 14 on described second substrate 13 is just for walking crosswise arrangement.Why described two-layer ITO is staggered, and in order to realize controlling both direction, promptly controls the electrode matrix of X-direction and the electrode matrix of Y direction exactly, so that detect the position of touch object touch points.

Above-mentioned two-layer ITO, promptly be positioned at the ITO layer 11 and the ITO layer 14 that is positioned at described second substrate 13 of described first substrate 10, because it respectively is arranged on the side near bonding coat 12 mutually, and bonding coat 12 itself is just selected the base material of transparent conductive film for use, so bonding coat 12 can be effectively bonding with it, and bonding coat 12 has played the effect of insulation, can short circuit between the two-layer like this ITO yet, avoided influencing each other.

In view of all respectively being laid with an ITO layer on described first substrate 10 and second substrate 13, so at this special construction, will corresponding different manufacture methods, following mask body is discussed its method step:

At first, on described first substrate 10 owing to only need to lay an ITO layer 11, so traditional exposure imaging technology and the gold-tinted technology of available use is used for guaranteeing to reach the requirement of high-precision laying ITO electrode layer 11; Secondly, for described second substrate 13, by also being laid with an ITO layer 14 thereon, and, just no longer need very high precision so on second substrate 13, lay ITO electrode layer 14 because ITO layer 11 is laid in respectively on two different substrates with ITO layer 14.So can adopt screen printing technique, this second substrate 13 that will have whole transparency electrode carries out the serigraphy mask, etching to be to obtain electrode pattern ITO layer 14 then, again at electrode ITO layer 14 edge printing conductive inks (indicating) thus electrode is drawn; At last, utilize bonding coat 12 that first substrate 10 and second substrate 13 that are laid with ITO layer 11 and ITO layer 14 respectively is bonding mutually, and guarantee to be laid with on each substrate the side of ITO layer need be bonding mutually by bonding coat 12.Finally form two-layer ITO and be laid in capacitance type touch control screen on the different substrate.

The method of manufacturing touch screen of the present invention, this first substrate 10 adopts coating process, with electro-deposition on described first substrate 10, can obtain needed electrode pattern by an etching, effectively reduced employed mould in production process and the production, so effectively reduced cost.And utilize the high precision etching technique, can be effectively the frame of product be controlled in 1.5 millimeters, so that this product can be used for every field.

This described second substrate 13 adopts the base material that has transparent conductive film that has processed, utilized the screen printing technique that only needs low technology, the printing photoresistance, obtain needed conductive pattern electrode layer after the etching, thereby print out ITO electrode layer 14, therefore few, the easy control of this operation is so cost is also lower.

Moreover, be that OCD bonding coat 12 is bonding because described first substrate 10 and second substrate 13 adopt, thus not only satisfied the requirement of printing opacity, and also bonding each other firm.Because this invention used for reference plated film simultaneously, gold-tinted technology and silk-screen printing technique have effectively used the advantage of each technology, have abandoned shortcoming, and it is outstanding functional to make that this product has, and has reached the lower cost and the requirement of technology.

Claims

1. capacitance type touch control screen, it comprises first substrate and second substrate and bonding coat, wherein bonding mutually between first substrate and second substrate by bonding coat, it is characterized in that: be laid with one deck ITO on described first substrate, the side near bonding coat on described second substrate also is laid with one deck ITO.

2. capacitance type touch control screen as claimed in claim 1 is characterized in that: the ITO layer on described first substrate is arranged near the bonding coat one side.

3. capacitance type touch control screen as claimed in claim 1 is characterized in that: all can be provided with electrically conductive ink on described first substrate and second substrate.

4. capacitance type touch control screen as claimed in claim 1 is characterized in that: described second substrate is a film like, and its material is the glass of plastics or thinner thickness.

5. capacitance type touch control screen as claimed in claim 1 is characterized in that: described first substrate can adopt the glass material or the macromolecule material of transparence.

6. capacitance type touch control screen as claimed in claim 1 is characterized in that: described bonding coat is selected the base material of transparent conductive film for use.

7. the manufacture method of a capacitance type touch control screen, it may further comprise the steps:

(a) on first substrate, utilize exposure imaging technology to lay the high-precision ITO electrode layer of one deck;

(b) utilize screen printing technique on second substrate, described second substrate that will have whole transparency electrode carries out the serigraphy mask, and etching is to obtain electrode pattern ITO electrode layer then;

(c) utilize bonding coat that first substrate and second substrate that are laid with the ITO electrode layer respectively is bonding mutually.

8. the manufacture method of capacitance type touch control screen as claimed in claim 7 is characterized in that: in described step (a), also need the gold-tinted technology at laying ITO electrode layer.

9. the manufacture method of capacitance type touch control screen as claimed in claim 7 is characterized in that: in described step (a) with (b), but the equal printing conductive inks in described electrode ITO layer edge.

10. the manufacture method of capacitance type touch control screen as claimed in claim 7, it is characterized in that: in described step (c), described bonding coat is bonding with the one side that has the ITO electrode layer on described first substrate and second substrate.