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High-strength projection-type capacitive screen and manufacturing method thereof

A production method and projection technology, applied in the field of capacitive screens, can solve the problems of difficult yield control, poor light transmission, heavy structure, etc., and achieve the effect of saving process, avoiding direct contact and improving compressive strength

Inactive Publication Date: 2014-09-17
向火平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The projected capacitive screens in the prior art mainly have the following structures: (1) GG mode; the first G is the protective glass, and the second G is the SENSOR sensor, that is, double-sided ITO glass, and the electrodes in the X direction are formed The pattern of the X-axis electrode layer and the Y-axis electrode pattern formed by the Y-direction electrode are respectively made on the two sides of the double-sided ITO glass, and the X-direction electrode and the Y-direction electrode are drawn out using metal wires. The GG structure adopts double-layer glass , the structure is thicker
(2) GFF mode; where G is the protective glass and F is the ITO film, which is used to make two ITO films for the X-axis electrode pattern and the Y-axis electrode pattern respectively, and then use OCA to bond them; GFF mode production process needs Using OCA for three times, its light transmission is not good and the yield is difficult to control
(3) GF2 mode; where G is the protective glass, and F is the double-sided ITO film. The X-axis electrode pattern and the Y-axis electrode pattern are respectively made on the front and back sides of F, bonded by OCA, and the X direction is connected by metal wires. The electrode and the Y-direction electrode are led out; during the production process, metal wires connected to the X-axis electrode pattern and the Y-axis electrode pattern need to be produced on both sides of the ITO film, which is difficult to manufacture and difficult to control the yield rate, and its shadow elimination effect is not good
(4) OGS mode, that is, the technology of directly forming an ITO conductive film and sensor on a layer of protective glass, that is, both the X-axis electrode pattern and the Y-axis electrode pattern are made on the protective glass, and the X-axis electrode and Y-axis electrode pattern need to be adjusted during the process The axis electrodes are bridged, and the metal lines connected to the X-axis electrode pattern and the Y-axis electrode pattern are made separately, which is difficult to manufacture and difficult to control the yield
[0005] In the prior art, the protective glass of the projected capacitive screen is prone to breakage, which cannot be applied to fields requiring high strength. For example, in order to meet the market demand, it is necessary to make a drop-proof capacitive screen and other fields

Method used

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  • High-strength projection-type capacitive screen and manufacturing method thereof
  • High-strength projection-type capacitive screen and manufacturing method thereof
  • High-strength projection-type capacitive screen and manufacturing method thereof

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Embodiment 1

[0064] Such as figure 2 , image 3 As shown, the present invention also provides a method for manufacturing a high-strength projected capacitive screen, comprising the following steps:

[0065] S1-0: use a screen printing machine to screen-print the low-temperature glaze onto the edge of the first glass substrate 1 to obtain a glaze frame layer 8; The disappearing layer9. Among them, the low-temperature glaze is a glaze with a temperature of 400-700°C. When the low-temperature glaze is screen-printed on the first glass substrate 1, it needs to be baked at a temperature of 400-700°C, so that the baked glaze has Strong covering force. More specifically, the screen printing of low-temperature glaze onto the edge of the first glass substrate 1 specifically includes the following steps: bottom plate, drying board, development, drying, revision, printing, drying, and finished product; wherein, drying board includes screen selection, frame selection , Stretching, drying, coating...

Embodiment 2

[0094] Such as figure 2 , Figure 4 As shown, the present invention also provides a method for manufacturing a high-strength projected capacitive screen, comprising the following steps:

[0095] S2-0: use a screen printing machine to screen-print the low-temperature glaze onto the edge of the first glass substrate 1 to obtain a glaze frame layer 8; The disappearing layer9. Understandably, step S2-0 is consistent with the manufacturing method of step S1-0 in Embodiment 1.

[0096] S2-1: Using a chemical method to temper the first glass substrate 1 to form a tempered glass substrate. Specifically, step S2-1 includes: treating the first glass substrate 1 with a high-temperature ion exchange method or a low-temperature ion exchange method.

[0097] Specifically, the high-temperature type ion exchange method is at a temperature greater than or equal to the softening point of the glass of the first glass substrate 1, adding Na 2 O or K 2 The first glass substrate 1 of O is pl...

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Abstract

The invention discloses a high-strength projection-type capacitive screen and a manufacturing method of the capacitive screen. The high-strength projection-type capacitive screen comprises a first glass substrate, a first ITO layer, a second glass substrate and a second ITO layer, wherein the first ITO layer is arranged on the first glass substrate, and the second ITO layer is arranged on the second glass substrate. The first ITO layer is connected with the second ITO layer through a lamination layer. The first glass substrate is a tempered glass substrate. The first ITO layer includes an X-axis electrode layer formed by a plurality of electrodes in the X-axis direction. The second ITO layer includes a Y-axis electrode layer formed by a plurality of electrodes in the Y-axis direction. The edge of the X-axis electrode layer is further provided with a metal wire X connected with the X-axis electrode layer. The edge of the Y-axis electrode layer is further provided with a metal wire Y connected with the Y-axis electrode layer. The metal wire X and the metal wire Y are respectively connected with a flexible circuit board. The lamination layer is an EVA glue layer or a PVB glue layer. The projection-type capacitive screen is high in impact strength; in addition, bridging process is omitted from the manufacturing method, and therefore the product yield can be effectively increased.

Description

technical field [0001] The invention relates to the field of capacitive screens, in particular to a high-strength projected capacitive screen and a manufacturing method thereof. Background technique [0002] The projected capacitive screen is a screen using projected capacitive touch technology. The touch screen panel can detect the change of capacitance at the position when the finger touches it, so as to calculate the position of the finger and perform multi-touch operation. Projected capacitive screens are widely used in various fields of our daily life, such as mobile phones, tablet computers, media players, navigation systems, digital cameras, electrical control, medical equipment and so on. [0003] The projected capacitive touch screen is to etch different ITO conductive circuit modules on two layers of ITO conductive glass coating. The patterns etched on the two modules are perpendicular to each other, and they can be regarded as sliders that change continuously in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
Inventor 向火平
Owner 向火平
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