CN109189267B

CN109189267B - Method for solving etching marks of touch screen

Info

Publication number: CN109189267B
Application number: CN201811042555.7A
Authority: CN
Inventors: 胡川; 刘小军; 丁永生; 华远洪
Original assignee: Wuhu Lunfeng Electronic Technology Co ltd
Current assignee: Wuhu Lunfeng Electronic Technology Co ltd
Priority date: 2018-09-07
Filing date: 2018-09-07
Publication date: 2021-06-04
Anticipated expiration: 2038-09-07
Also published as: CN109189267A

Abstract

The invention discloses a method for solving etching marks of a touch screen, relates to the field of touch screens, and prints a shadow eliminating liquid after finishing the steps of cutting, curing and etching the touch screen.

Description

Method for solving etching marks of touch screen

Technical Field

The invention relates to the field of touch screens, in particular to a method for solving etching marks of a touch screen.

Background

The touch screen becomes the most intuitive human-computer interaction device and is widely applied to the control input of various electronic equipment. The existing touch screen manufacturing scheme comprises a wet method scheme and a dry method scheme, wherein the wet method scheme is to etch a required touch pattern by adopting a printing etching paste corrosion mode, the dry method scheme is to etch the required touch pattern by adopting a laser mode, and the two schemes have respective advantages and disadvantages;

dry method, which uses light to carve out the circuit; the light spot is about 0.02-0.03 MM, and the burnt line spacing is about 0.03 MM; such thin lines are difficult to see by naked eyes, so that the dry method has the advantage of beautiful appearance due to good appearance visual effect; the method has the defects that the efficiency is low because all circuits are moved for 2-4 times by using a beam of light, and meanwhile, in order to avoid the interference of redundant residual conducting layers in some places on sensing signals of the touch screen, redundant conducting layers need to be cleaned by conducting blocks with useless edges through multiple times of laser, so that the production efficiency is seriously influenced for batch production, particularly on products with large typesetting and large size, and the cost is increased.

The wet method is to etch the needed touch pattern by printing etching paste, and all the circuit printing can be etched at one time by screen printing, so that the method has the advantage of high efficiency, and the method can also completely etch the redundant unnecessary conductive part to reduce the interference to the touch screen; however, the screen plate has a limit on the width of the printed circuit, generally, the required line width is more than 0.3MM, some companies try to use 0.2MM, but the yield is reduced, the etched 0.3MM part of the circuit is 10 times wider than the 0.03MM part of the circuit in a dry method, and a color difference and a dent with a low height are generated after the conductive layer part is removed and the etched part is not removed, so that the printed circuit can be obviously seen by naked eyes after being made into a touch screen, particularly under the conditions of a certain angle and light reflection; the problems of 'bottom shadow' and 'etching mark' in the industry are solved, and the appearance effect of the product is seriously influenced.

Chinese patent application CN104571764A discloses a capacitive touch screen structure with low etching mark and its manufacturing method, the structure includes: a substrate; the shielding layer is arranged above the first surface of the substrate and corresponds to the frame area; the first shadow eliminating layer is formed on the shielding layer and the exposed first surface of the substrate; the first conducting layer is formed on the first shadow eliminating layer and comprises a plurality of first conducting electrodes which are parallel to the first direction and are arranged at intervals and can be connected with the circuit board; an insulating layer formed on the first conductive layer; the second conducting layer is formed on the second shadow eliminating layer and comprises a plurality of second conducting electrodes which are parallel to the second direction and are arranged at intervals and can be connected with the circuit board; and a second shadow layer formed on the second conductive layer. The device has the advantages that: the chromatic aberration of the first conducting layer, the second conducting layer and the etching area is reduced, the phenomenon of 'etching marks' of the capacitive touch screen is reduced, the visibility of the touch screen is improved, the steps are complicated, the production efficiency is influenced, and the practicability is low.

Disclosure of Invention

The invention aims to provide a method for solving the etching mark of a touch screen, so as to solve the defects caused by the prior art.

A method for solving etching marks of a touch screen is used for printing a shadow eliminating liquid after the steps of material cutting, curing and etching of the touch screen are finished, and the method comprises the following specific steps:

step one, after the etching paste is printed on the etching screen, etching a required conductive layer;

step two, obtaining the etched thickness according to the etched thickness of the conductive layer, obtaining the thickness of the shadow eliminating liquid to be printed according to the etched thickness, wherein the screen printing plate for printing the shadow eliminating liquid adopts the etched screen printing plate in the step one, and the thickness of the shadow eliminating liquid can be adjusted by adjusting the thickness of the photosensitive adhesive on the printing screen printing plate;

and step three, printing the shadow eliminating liquid by using a printing screen, and filling the originally etched dents back, so that the thickness of the printing shadow eliminating liquid can be ensured to fill and level the etching marks, and the etching marks caused by the height difference of the concave and convex parts are solved.

Preferably, the vanishing liquid is an insulating liquid medicine, and the color of the liquid medicine is similar to that of the corroded part.

Preferably, when the conductive layer is ITO, the thickness of the conductive layer is the sheet resistance thickness of ITO.

Preferably, when the conductive layer is a nano silver material, the thickness of the conductive layer is the OC thickness on the surface of the nano silver material.

The invention has the advantages that: the wire harness cutting device is simple in structure and convenient to operate, two operators can cut wire harnesses simultaneously by arranging the two oblique cutting mechanisms, the working efficiency is improved, and meanwhile, the air cylinder can be flatly placed and stored when not in use, so that the occupied space is small, and the maintenance is convenient.

Drawings

Fig. 1 is a schematic structural diagram of a conventional product.

FIG. 2 is a schematic diagram of a prior art process for thinning a circuit by reducing etching traces.

FIG. 3 is a schematic diagram of a printing vanishing liquid for reducing etching marks in the present invention.

Fig. 4 is a schematic diagram of the structure of the product after the invention is used.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Example 1

As shown in fig. 1 to 4, a method for solving etching marks of a touch screen, which is used for printing a shadow eliminating liquid after finishing the steps of cutting, curing and etching the touch screen, comprises the following specific steps:

In this embodiment, the shadow eliminating liquid is an insulating liquid medicine, the color of the liquid medicine is similar to the color of the corroded part, and when the conductive layer is ITO, the thickness of the conductive layer is the sheet resistance thickness of ITO.

Example 2

In this embodiment, the shadow eliminating liquid is an insulating liquid, the color of the liquid is similar to the color of the portion to be etched, when the conductive layer is made of a nano silver material, the thickness of the conductive layer is the OC thickness of the surface of the nano silver material, which is different from that of embodiment 1, the thickness of the conductive layer is different, and the thickness of the printed shadow eliminating liquid is different.

The working process and principle are as follows: the invention fills the originally etched dents by printing the shadow eliminating liquid, solves the problems of etching marks caused by the height difference of concave and convex, and the color of the shadow eliminating liquid is similar or the same as that of the etched parts, thus solving the problem of bottom shadow caused by color difference, and the shadow eliminating liquid is insulating and avoiding the problem of conducting short circuit with the original touch pattern.

Based on the above, the method has the advantages that the steps are simple, the implementation is easy, the step of printing the shadow eliminating liquid is only added in the existing process, the etching screen plate is used for printing the shadow eliminating liquid, the cost is saved, the problem of etching marks in the manufacturing of the touch screen is solved, and the yield is improved.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. A method for solving etching marks of a touch screen is characterized by comprising the following steps: printing a shadow eliminating liquid after finishing the process steps of cutting, curing and etching the touch screen, and specifically comprising the following steps:

2. The method for solving the etching mark of the touch screen as claimed in claim 1, wherein: the vanishing liquid is an insulating liquid medicine, and the color of the liquid medicine is similar to that of the corroded part.

3. The method for solving the etching mark of the touch screen as claimed in claim 1, wherein: when the conducting layer is ITO, the thickness of the conducting layer is the sheet resistance thickness of the ITO.

4. The method for solving the etching mark of the touch screen as claimed in claim 1, wherein: when the conducting layer is made of the nano-silver material, the thickness of the conducting layer is equal to the thickness of OC on the surface of the nano-silver material.