CN1447279A

CN1447279A - High reliable touch screen and manufacturing technique

Info

Publication number: CN1447279A
Application number: CN 03112995
Authority: CN
Inventors: 刘忠安; 张继军
Original assignee: CETC 55 Research Institute
Current assignee: CETC 55 Research Institute
Priority date: 2003-03-18
Filing date: 2003-03-18
Publication date: 2003-10-08
Anticipated expiration: 2023-03-18
Also published as: CN1186745C

Abstract

A reliable resistor analog touching screen and its process technology is that an electrode and lead-out wire of upper screen of the said touching screen and an electrode and a lead-out wire of a lower screen are mounted on the lower screen and a high temperature processing method is applied to increase the joining strength of the electrode, the glass base plate and the controller cable to improve its temperature character and the squeare resistance uniformity of ITO conductive film of the lower screen, any graph is not processed on the upper transparent resin film avoiding deformation of the upper soft film caused by heating and solidity to increase its reliability.

Description

Highly reliable touch-screen and manufacture craft thereof

Technical field

The present invention relates to highly reliable resistance simulation touch-screen and manufacture craft thereof.

Background technology

Existing resistance simulation touch-screen as shown in Figure 1 and Figure 2, is made up of last screen 1 and following screen 2 and control circuit.Shield 2 down and be generally the glass plate that is coated with transparent ITO (indium oxide/tin oxide) conducting film 20, and go up screen 1 for being coated with the transparent resin film of conducting film 10, upper and lower screen 1,2 edges have all made

electrode

13,23 respectively, and be connected with control circuit by

electrode outlet line

14,24, there is insulation course 6 to isolate between upper and lower screen 1,2 edge electrodes, and by sealing-in glue or double sticky tape 5 involutions, the centre is used every the insulate conducting film 10,20 of upper and lower screen of sub-dot matrix 7.When last screen 1 is not touched, the conducting film 10,20 of upper and lower screen does not contact each other, in case be touched, in the touch point, the conducting film 10,20 of upper and lower screen 1,2 just interconnects, and controller is calculated touch point position by the electric signal of detecting electrode extension line 14,24.Because last screen transparent resin film can not stand high temperature more than 200 ℃, so the upper and

lower screen electrode

13,23 of present resistance simulation touch-screen and insulation course 6 all adopt low-temperature setting or ultraviolet-curable materials to make, the temperature characterisitic higher temperatures material of these materials is poor, and because with the electrode of low-temperature solidified silver paste making and the poor bonding strength of glass, therefore also relatively poor as the reliability of the touch-screen of electrode material making with low-temperature solidified silver paste.For obtaining the touch station-keeping ability of high resolution, the homogeneity of the conducting film 20 of screen is high more good more under requiring in addition.Side's resistance homogeneity of electrolemma is low, can influence the touch locating accuracy and the reliability of touch-screen.

Summary of the invention

The bond strength height that the purpose of this invention is to provide a kind of its electrode and glass, contact conductor and controller stube cable, the highly reliable touch-screen of side's resistance good uniformity of the conducting film of following screen.

Another object of the present invention provides the manufacture craft of this highly reliable touch-screen.

Purpose of the present invention can reach by following measure:

A kind of highly reliable touch-screen comprises screen 1, shields 2 and controller down, on shield 1 transparent resin film for conduction; Under to shield 2 be to make electrode 23 in the transparent conducting glass panel edges, and link to each other with controller by

extension line

14,24; Upper and lower screen 1,2 edges isolate with insulation course 6 and with sealing-in glue or double sticky tape 5 involutions, conducting film 10,20 usefulness of middle upper and lower screen are isolated every sub-dot matrix 7, can be between the upper and lower screen 1,2 by touching conducting, it is characterized in that being provided with screen electrode 13 and extension line 14 and the extension line 24 of screen electrode 23 down on 2 the zone 21 shielding down, and mutually insulated, and with down conducting film 20 insulation of screen; Electrode 23 still is arranged on down on the conducting film 20 of screen.

A kind of highly reliable technology for manufacturing touch screen is characterized in that the electrode 13 of screen and the electrode 23 and the extension line 24 of extension line 14 and following screen, is to adopt high temperature silver pulp material to be incubated 10～30 minutes under 550 ℃-590 ℃ high temperature to be made.

Advantage of the present invention:

The present invention adopts high-temperature electric conduction silver slurry and high temperature sintering technology to make the electrode and the extension line thereof of touch-screen; Not only the temperature characterisitic of the bond strength of electrode and glass and stube cable and touch-screen improves; Improved side's resistance homogeneity of the conducting film of time screen simultaneously.But because last screen transparent resin film can not be used high temperature sintering, and high temperature sintering also can make the very big increase of side's resistance causing of ITO conducting film.For this reason, the present invention is when adopting the high temperature sintering technology, make down side's resistance of screen, than low about 2～4 times of design load, and all electrodes and extension line all are produced on down screen, do not make any graphic making technology and go up the screen transparent resin film, avoided the deformation of the flexible membrane of upper screen that brings in the technological processs such as heating cure, thereby the reliability of touch-screen is further improved.

Description of drawings

Fig. 1 is the structural representation of traditional four-wire ohm touch-screen;

Fig. 2 is the structural representation of traditional five wire resistive touchscreen;

Fig. 3 is the electrode and the extension line synoptic diagram of four-wire ohm touch-screen of the present invention;

Fig. 4 is the electrode and the extension line synoptic diagram of five wire resistive touchscreen of the present invention;

Fig. 5 is the electrode and the extension line synoptic diagram of six wire resistive touchscreen of the present invention;

Fig. 6 is the electrode and the extension line synoptic diagram of eight wire resistive touchscreen of the present invention.

Embodiment

Embodiment one

As shown in Figure 3, in traditional four-wire ohm simulate of Fig. 1, the

electrode

13,23 of the upper and lower screen of two pairs of quadratures is arranged, be produced in above the conducting film 10 and 20 of screen 1 and following screen 2.Owing to have pair of electrodes 13 to be produced on the transparent resin film of screen, generally adopt low temperature (generally not being higher than 120 ℃) to solidify the silver slurry and make.In the present embodiment, as shown in Figure 3, all

extension lines

14,24 of the electrode 13 of last screen and upper and lower screen all are produced on down screen not to be had on the zone 21 of ITO conducting film, and insulated from each other; The electrode 23 of following screen still is produced on down on the ITO conducting film 20 of screen conduction.The thickness of the electrode 13 of last screen is slightly larger than down the electrode 23 of screen and the gross thickness of insulation course 6, and all electrodes, contact conductor all use high temperature silver pulp material, and at high temperature sintering forms.This high temperature sintering mainly contains silver powder, glass dust and cementing agent and constitutes with the silver slurry, as the NP4734 silver slurry of Noritake; The photosensitive silver slurry of the DC206 of Dupont, DC242; The EPH-200TR6601 silver slurry of Taiyo Ink, its sintering temperature is generally between 550 ℃～590 ℃.As adopt 550 ℃ sintering temperature, can be 550 ℃ of insulations 30 minutes; Under 590 ℃ sintering temperature, can be 590 ℃ of insulations 10 minutes.Consider that high temperature can cause the down increase of side's resistance of the ITO conducting film 20 of screen 2, in the present embodiment, should make play conducting film side's resistance of screen 2, hang down 2～4 times than without high-temperature technology the time.Promptly the resistance of the side of the conducting film 20 of screen is in 50 Ω～250 Ω/mouths down.Then with low-temperature setting or ultraviolet-curable materials make insulation course 6, every sub-dot matrix 7, come the upper and lower screen 1,2 of sealing-in by sealing-in glue 5 again.The electrode 13 of last screen is connected conducting by anisotropy conductiving glue (or other conductive material) with the conducting film 10 of last screen in the sealing-in process of upper and lower screen 1,2.The electrode outlet line 14 that is produced on down on the panel glass all is connected with the stube cable of controller by anisotropy conductiving glue with 24.

Embodiment two

As shown in Figure 4, with the tradition five line resistance simulate comparison of Fig. 2, in the present embodiment, all

extension lines

14,24 of the electrode 13 of last screen and upper and lower screen all are produced on down screen not to be had on the zone 21 of ITO conducting film, and insulated from each other; The electrode 23 of following screen still is produced on down on the ITO conducting film 20 of screen conduction.The thickness of the electrode 13 of last screen is slightly larger than down the electrode 23 of screen and the gross thickness of insulation course 6, and all electrodes, contact conductor all use as the high-temperature sintered silver paste among the embodiment one, and at high temperature sintering forms.Then with low-temperature setting or ultraviolet-curable materials make insulation course 6, every sub-dot matrix 7, come the upper and lower screen 1,2 of sealing-in by sealing-in glue 5 again.The electrode 13 of last screen is connected conducting by anisotropy conductiving glue (or other conductive material) with the conducting film 10 of last screen in the sealing-in process of upper and lower screen 1,2.The electrode outlet line 14 that is produced on down on the panel glass all is connected with the stube cable of controller by anisotropy conductiving glue with 24.

Embodiment three

As shown in Figure 5, this is the embodiment of an example six line resistance simulate.In the present embodiment, should be produced on the electrode that upward shields 13 and the corresponding extension line 14 of two six line resistance simulate of screen 1 originally, all being produced on down to shield with the electrode outlet line 24 that shields does not down have on the zone 21 of ITO conducting film, and insulated from each other; The electrode 23 of following screen still is produced on down on the ITO conducting film 20 of screen conduction.The thickness of the electrode 13 of last screen is slightly larger than down the electrode 23 of screen and the gross thickness of insulation course 6, and all electrodes, contact conductor all use as the high-temperature sintered silver paste among the embodiment one, and at high temperature sintering forms.Then with low-temperature setting or ultraviolet-curable materials make insulation course 6, every sub-dot matrix 7, come the upper and lower screen 1,2 of sealing-in by sealing-in glue 5 again.The electrode 13 of last screen is connected conducting by anisotropy conductiving glue (or other conductive material) with the conducting film 10 of last screen in the sealing-in process of upper and lower screen 1,2.The electrode outlet line 14 that is produced on down on the panel glass all is connected with the stube cable of controller by anisotropy conductiving glue with 24.

Embodiment four

As shown in Figure 6, this is the embodiment of an example eight line resistance simulate.In the present embodiment, originally should be produced on electrode 13 and corresponding four extension lines 14 of going up screen of two eight line resistance simulate of screen 1, all being produced on down screen with the electrode outlet line 24 that shields does not down have on the zone 21 of ITO conducting film, and insulated from each other; The electrode 23 of following screen still is produced on down on the ITO conducting film 20 of screen.The thickness of the electrode 13 of last screen is slightly larger than down the electrode 23 of screen and the gross thickness of insulation course 6, and all electrodes, contact conductor all use as the high-temperature sintered silver paste among the embodiment 1, and at high temperature sintering forms.Then with low-temperature setting or ultraviolet-curable materials make insulation course 6, every sub-dot matrix 7, come the upper and lower screen 1,2 of sealing-in by sealing-in glue 5 again.The electrode 13 of last screen is connected conducting by anisotropy conductiving glue (or other conductive material) with the conducting film 10 of last screen in the sealing-in process of upper and lower screen 1,2.The electrode outlet line 14 that is produced on down on the panel glass all is connected with the stube cable of controller by anisotropy conductiving glue with 24.

Embodiment five

In embodiment one, embodiment two, embodiment three or embodiment four, insulation course 6 also adopts high-temperature material, and uses the high-temperature technology sintering.The NP-7972T transparent dielectric material of this high temperature insulating material such as Noritake, its sintering temperature be at 560 ℃, and 560 ℃ of insulations 30 minutes; Or its sintering temperature is at 590 ℃, and 590 ℃ of insulations 10 minutes.

Claims

1, a kind of highly reliable touch-screen comprises screen (1), shields (2) and controller down, and last screen (1) is transparent resin film of conduction; Following screen (2) is to make electrode (23) in the transparent conducting glass panel edges, and links to each other with controller by extension line (14), (24); Upper and lower screen (1), (2) edge are isolated with insulation course (6) and with sealing-in glue or double sticky tape (5) involution, conducting film (10), (20) of middle upper and lower screen are used every sub-dot matrix (7) and are isolated, can be between upper and lower screen (1), (2) by touching conducting, it is characterized in that on the zone (21) of shielding (2) down, being provided with the electrode (13) of screen and the extension line (24) of extension line (14) and the following electrode (23) that shields, and mutually insulated, and with down conducting film (20) insulation of screen; Electrode (23) still is arranged on down on the conducting film (20) of screen.

2, a kind of highly reliable technology for manufacturing touch screen, it is characterized in that the electrode (13) of screen and the electrode (23) and the extension line (24) of extension line (14) and following screen, is to adopt high temperature silver pulp material to be incubated 10～30 minutes under 550 ℃-590 ℃ high temperature to be made.

3, highly reliable technology for manufacturing touch screen according to claim 2 is characterized in that high temperature silver pulp material is NP4734 silver slurry or the photosensitive silver slurry of DC206, DC242 of Dupont or the EPH-200TR6601 silver slurry of Taiyo Ink of Noritake.

4,2 described highly reliable technology for manufacturing touch screen as requested is characterized in that insulation course (6) also adopts the high-temperature medium material to be incubated 10～30 minutes under 550 ℃～590 ℃ high temperature and is made.

5, highly reliable technology for manufacturing touch screen according to claim 4 is characterized in that the high-temperature medium material is the NP-7972T transparent dielectric material of Noritake.