CN107992238A - Contact panel module - Google Patents

Abstract

The invention discloses a kind of contact panel module, it is to need to be open and expose the then area of the induction electrode floor of lower floor for the induction electrode floor on upper strata, so that the situation that the film near the opening of the induction electrode layer on upper strata is easily peeling, and influence the yield of its top electrode, therefore design makes its distance be at least more than 2.5 millimeters, reduces the generation of stripping situation by the electrode on upper strata away from opening, so as to increase process rate, and reduce production cost.

Description

Touch Panel Module

technical field

The present invention relates to a touch panel module, which is applied to various electronic devices, in particular to a touch panel module that increases the production yield by increasing the distance between electrodes and openings.

Background technique

Thanks to technological progress, portable electronic devices can be seen everywhere in people's lives, such as notebook computers, tablet computers, smart phones, etc., and with the increasing dependence of users, the functions of portable electronic devices also increase As a result, they become more and more powerful; the common feature of these products is that they have a touch-sensitive display screen, which can not only display various multimedia audio and video to users, but also provide users with a very convenient operation interface. Furthermore, in recent years, the trend of portable electronic devices is to provide touch operations with larger screens, which makes operations more convenient and flexible for consumers.

At present, the conductive films of touch panels are mostly indium tin oxide (ITO) films or nano-silver films, and the conductive films (or transparent electrode layers) are formed on transparent substrates, such as glass board or polyethylene terephthalate (Polyethylene terephthalate, referred to as PET) board; wherein, the nano-silver film is composed of a plurality of nano-metal wires.

And the manufacturing method of conventional conductive thin film (such as indium tin oxide thin film or nano-silver thin film) being formed on the transparent substrate, first, after the conductive thin film on the surface of the transparent substrate is coated with photoresist, then, for conductive The film is baked, and after the baking, the exposure and development process is carried out to form a transparent electrode layer with electrode patterns on the surface of the substrate; after that, the transparent electrode layer on the surface of the substrate is cleaned, etched, cleaned, and baked. Afterwards, screen printing is performed on the transparent electrode layer, so that a wiring layer is formed around the surface of the substrate to electrically connect adjacent transparent electrode layers, and finally, the touch substrate can be obtained by baking again.

Generally speaking, touch screens can be divided into resistive touch screens and capacitive touch screens. Resistive touch screens are the positions touched by the user, due to the pressure generated between the glass and the electrodes. The short-circuit phenomenon of the capacitive touch screen is sensed by the position touched by the user, and the capacitance value of the electrode changes due to the touch. In the current design of capacitive touch panels, there are mainly designs in which the indium tin oxide (ITO) layer is made on the glass and then laminated on the strengthened glass, which is called GG (Glass Glass). The design that the layer is made on a polyethylene terephthalate (PET) film and then laminated on the strengthened glass is called GFF (Glass Film Film).

Among them, the GFF (double-layer film) structure has a double-layer ITO film, and the two layers have the wiring of the receiving (RX) electrode and the wiring of the transmitting (TX) electrode, and then they are bonded together. The electrodes of the lower layer can be connected with the outside, and the upper film needs to have an opening at a position corresponding to the lower bonding area, so that the lower bonding area can be exposed for subsequent conduction. As far as the manufacturing process is concerned, the opening is mostly formed by stamping. Therefore, after the adhesive bonding, the adhesion condition at this position will be poor, and peeling will easily occur at this position. Once the peeling condition erodes the upper electrode, the It will make it invalid and damaged. In practice, its defect rate can reach 3-10%, which has a great impact on the overall yield rate.

Contents of the invention

In view of this, the present invention addresses the deficiencies in the prior art, and its main purpose is to provide a touch panel module that can effectively reduce the situation where the sensing electrode layer is peeled off near the opening and thus affects the electrodes, so as to improve production yield and reduce manufacturing cost.

Therefore, in order to achieve the above object, the present invention provides a touch panel module, which includes a first sensing electrode layer, a second sensing electrode layer, and a first glue layer, the first sensing electrode layer has a plurality of first electrodes, The first electrode is electrically connected to the first bonding area, the second sensing electrode layer has a plurality of second electrodes, the second electrode is electrically connected to the second bonding area, and the first sensing electrode layer is combined with the second bonding area through the first glue layer. The two sensing electrode layers are bonded to each other, and the second sensing electrode layer is provided with an opening corresponding to the first bonding area of the first sensing electrode layer, so that the second bonding area is exposed, and the opening is connected to the second electrode. The shortest distance is more than 2.5 millimeters (mm), so that the condition of peeling off near the opening and affecting the electrodes can be greatly improved, thereby reducing manufacturing costs, increasing production capacity, improving production yield, and improving competitive advantages.

According to an embodiment of the present invention, the second sensing electrode layer may be an indium tin oxide (ITO) film.

According to an embodiment of the present invention, the second sensing electrode layer may be a composite film composed of an indium tin oxide film and a copper film.

According to an embodiment of the present invention, when the surface resistance of the second sensing electrode layer is greater than 70 ohm/square (ohm/sq) and less than or equal to 100 ohm/sq, the shortest distance between the opening and the second electrode is 2.5- 3.5 mm.

According to an embodiment of the present invention, when the surface resistance of the second sensing electrode layer is less than or equal to 70 ohms/square, the shortest distance between the opening and the second electrode is 3.5-4.5 mm.

According to an embodiment of the present invention, the touch panel module disclosed in the present invention may further include an adhesive layer for adhering the first sensing electrode layer and the second sensing electrode layer.

In the following detailed description by means of specific embodiments, it will be easier to understand the purpose, technical content, characteristics and effects of the present invention. In the following, a detailed description will be made through the specific embodiments and the accompanying drawings, so that it will be easier to understand the purpose, technical content, characteristics and effects of the present invention.

Description of drawings

FIG. 1 is a three-dimensional schematic diagram of a touch panel module provided by the present invention.

FIG. 2 is a combined schematic diagram of the touch panel module provided by the present invention.

3 is a schematic diagram of the shortest distance between the opening and the second electrode of the touch panel module provided by the present invention.

FIG. 4 is a schematic diagram of a second adhesive layer added to the touch panel module provided by the present invention.

Reference signs:

10 The first sensing electrode layer

11 First electrode

12 First connection area

20 Second sensing electrode layer

21 Second electrode

22 Second connecting area

23 openings

30 first adhesive layer

40 Second adhesive layer

D distance

Detailed ways

The invention discloses a touch panel module. The touch panel is applied to display devices, tablet computers, smart phones, notebook computers, desktop computers, televisions, satellite navigation, car displays, aviation displays or Various electronic devices such as portable DVD players, and the conductive film of the touch panel is mostly indium tin oxide (Indium tin oxide, referred to as ITO) film or nano-silver film. Moreover, touch screens can be divided into resistive touch screens and capacitive touch screens. Among them, the capacitive touch screen mainly has a design in which an indium tin oxide (ITO) layer is made on the glass and then laminated on the strengthened glass. , called GG (Glass Glass), there is also a design in which the indium tin oxide layer is made on a polyethylene terephthalate (PET) film, and then laminated on the strengthened glass, called GFF (Glass Film Film). The present invention mainly focuses on the part of the double-layer film (Glass Film Film; GFF).

Please refer to FIG. 1 and FIG. 2 , which respectively depict a three-dimensional schematic view and a combined schematic view of the touch panel module provided by the present invention. The touch panel module 1 includes a first sensing electrode layer 10 and a second sensing electrode layer 20, which are indium tin oxide (Indium tin oxide, referred to as ITO) thin films, that is to say, the indium tin oxide layer It is made on a polyethylene terephthalate (PET) film. Of course, the material is not particularly limited, but currently on the market, the form of ITO formed on a PET film is the most widely used. And the first sensing electrode layer 10 and the second sensing electrode layer 20 respectively have a first electrode 11 and a second electrode 21, that is, the first sensing electrode layer 10 has a plurality of first electrodes 11, and the second sensing electrode layer 20 has a plurality of first electrodes 11. A plurality of second electrodes 21 .

For example, the first sensing electrode layer 10 can be a receiving (RX) electrode layer disposed on the lower layer, while the second sensing electrode layer 20 is a transmitting (TX) electrode layer disposed on the upper layer, which are distributed on the touch panel. The sensing area provides sensing during user operation, and the surrounding area is the frame area of the touch panel. Generally speaking, the wiring lines of the first electrodes 11 on the first sensing electrode layer 10 and the second electrodes 21 on the second sensing electrode layer 20 are roughly vertical, and because they need to be bonded to each other later, in terms of size, That is to say, the first sensing electrode layer 10 and the second sensing electrode layer 20 are also roughly the same; similarly, this part is only an example for illustration in conjunction with the drawings, and is not used to limit the type of its circuit layout, and the drawings The aspects in the drawings are only for illustration, and are not intended to limit the scope of rights to be protected by the present invention.

Then, there is a first bonding area (bonding area) 12 on the first sensing electrode layer 10, which is electrically connected to the first electrode 11 to facilitate communication with the external connection; The region 22 is then electrically connected to the aforementioned second electrode 11 . The first sensing electrode layer 10 and the second sensing electrode layer 20 are attached to each other by the first adhesive layer 30, wherein the first adhesive layer 30 is most commonly OCA optical adhesive (Optical Clear Adhesive; OCA), which can be used Curing by ultraviolet light produces an adhesive effect, and at the same time has a high light transmittance (>99%), so it is suitable for bonding of this type of product; in order to make the first bonding area of the lower first sensing electrode layer 10 still It can be exposed that openings 23 are provided at corresponding positions on the second sensing electrode layer 10 .

Next, please refer to FIG. 3 , which shows a schematic diagram of the shortest distance between the opening of the touch panel module and the second electrode provided by the present invention. Because of this structure, the vicinity of the opening 23 must become the position with the weakest relative bonding force. Once peeling occurs, it will inevitably start from the adjacent area, thus affecting the adjacent second electrode 21; in order to overcome this inherent limitation, the present invention uses the first The relative distance D between the two electrodes 21 and the opening 23 is increased. In other words, the shortest distance D between the opening 23 and the second electrode 21 is designed to be more than 2.5 millimeters (mm), thereby greatly reducing the peeling near the opening 23 and affecting the second electrode. 21, thereby increasing the yield of production.

In practice, taking the example of an indium tin oxide (ITO) film or a composite film composed of an ITO film and a copper film, when the surface resistance of the second sensing electrode layer 20 is greater than 70 ohms/square (ohm/sq) , and less than or equal to 100 ohms/square, the shortest distance D between the opening 23 and the second electrode 21 is preferably 2.5 to 3.5 millimeters; and when the surface resistance of the second sensing electrode layer 20 is less than or equal to 70 ohms/square ( ohm/sq), the shortest distance D between the opening 23 and the second electrode 21 is preferably 3.5-4.5 millimeters; in this way, this bad situation can be greatly reduced.

Next, please refer to FIG. 4 , a second adhesive layer 40 can be provided on the second sensing electrode layer 20 for subsequent bonding of the substrate (not shown in the figure), forming a double-layer thin film (Glass Film Film; GFF) type. state. Wherein, the material of the substrate can be glass, or glass doped with polyethylene terephthalate (polyethylene terephthalate; PET) and other materials; and the second adhesive layer 40 is the same as the aforementioned first adhesive layer 30, and can It is OCA optical glue.

To sum up, according to the touch panel module provided by the present invention, the distance between the opening of the upper sensing electrode layer and the electrode is widened, so that even if there is a peeling phenomenon, the electrode will not be affected, and the overall performance can be improved. The yield rate has greatly improved the competitive advantage of the industry.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications based on the features and spirit described in the scope of the application of the present invention shall be included in the scope of the patent application of the present invention.

Claims (6)

1. A touch panel module, characterized in that it comprises: a first sensing electrode layer, the first sensing electrode layer has a plurality of first electrodes and a first bonding area electrically connected to the first electrodes; and A second sensing electrode layer, the second sensing electrode layer has a plurality of second electrodes and a second bonding area electrically connected to the second electrodes, the second sensing electrode layer is arranged on the first sensing electrode layer on, and adjacent to the second bonding area, there is an opening for the first bonding area to be exposed; Wherein, the shortest distance between the opening and the second electrodes is more than 2.5 mm. 2. The touch panel module according to claim 1, wherein the second sensing electrode layer is an indium tin oxide film. 3. The touch panel module according to claim 1, wherein the second sensing electrode layer is a composite film composed of an indium tin oxide film and a copper film. 4. The touch panel module according to claim 1, wherein when the surface resistance of the second sensing electrode layer is greater than 70 ohms/square and less than or equal to 100 ohms/square, the opening and the second electrodes The shortest distance is 2.5 to 3.5 mm. 5. The touch panel module according to claim 1, wherein when the surface resistance of the second sensing electrode layer is less than or equal to 70 ohms/square, the shortest distance between the opening and the second electrodes is 3.5- 4.5 mm. 6. The touch panel module as claimed in claim 1, further comprising an adhesive layer for adhering the first sensing electrode layer and the second sensing electrode layer.