TW201413554A - Manufacturing technique of single layer capacitive touch screen and electronic equipment processing method using the touch screen - Google Patents

Abstract

A manufacturing technique of a single layer capacitive touch screen includes the following steps. Step S1: providing a glass substrate; step S2: CNC pre-processing the glass substrate to form a contour groove of a terminal product on one side of the glass substrate; step S3: reinforcing the glass substrate; step S4: surface treating the glass substrate; step S5: electroplating an ITO conductive film to the glass substrate; step S6: making electrode pattern on the ITO conductive film; step S7: making a conducting wiring and forming a circuit interface terminal on one end of the glass substrate; step S8: cutting the glass substrate; step S9: CNC edge grinding; and step S10: bonding an FPC to the circuit interface terminal of the glass substrate. Because the manufacturing technique of the single layer capacitive touch screen and the electronic equipment processing method using the single layer capacitive touch screen adopt a step of CNC pre-processing the glass substrate to form a depth followed by a reinforcing treatment, the strength of the single layer capacitive touch screen after processing will not degrade.

Description

Single-layer capacitive touch screen manufacturing process and adopting the touch type Screen electronic device processing method

The invention relates to a method for manufacturing a capacitive touch screen, in particular to a single-layer capacitive touch screen manufacturing process and an electronic device processing method using the touch screen.

A general capacitive touch panel has a multi-layered structure of a touch sensing layer (English: Touch Sensor) under a cover glass (or a PET film), which increases the design difficulty and Increasing costs is also time consuming. Since the conventional projected capacitive touch panel must be made of a touch sensing layer using 1 or 2 pieces of glass, and a cover plate, a complicated structure is caused. Therefore, touch panel module manufacturers are actively integrating touch sensors into surface covers, hoping to reduce material costs and reduce the thickness and weight of touch panel modules. Therefore, the ultimate solution for capacitive touch is that R&D personnel can use the single-layer protective glass to complete the touch function. This way of forming all the touch sensing circuits on the protective glass, the thinnest and lightest structure, the lowest material cost, the lowest production equipment cost investment, and the largest touch panel output capability. Although each touch module factory has different names for this new process, including Touch on lens, one glass solution, window integrated sensor touch, direct patterned window, etc., these are all integrated into the surface cover of the touch sensor. Board method. Each method uses a piece of glass as a substrate for the surface cover and the touch sensor, referred to as a "single layer capacitive touch screen".

It is understood that since 2011, many brand manufacturers such as NOKIA, Apple, Samsung, etc., have begun to demand lighter, thinner and more cost-competitive touch panels, which is expected to contribute to single-layer capacitive touch. Accelerated popularity of controlled screen technology. The benefits of a single-layer capacitive touch screen are the lowest material cost, the best optical characteristics, and the lightest weight. Use on non-display screens such as mirrors, tables, windows, vending machines, or replace keyboards and buttons. The application is mainly for industrial, military, outdoor use and external touch.

However, single-layer capacitive touch screens have many challenges in development, such as whether to apply the post-coating or to post-coating. The problems of fragmentation and scratching during the strengthening process, the processing of the printing surface, the coating film used, the impedance of the conductive film, and the capacitive coupling with the LCD Vcom layer. In particular, many current single-layer capacitive touch screen manufacturing processes generally perform a CNC molding process after forming a touch sensing layer on a glass, so that the original strength of the glass is destroyed, and the production time is excessively expensive. Insufficient mass production. Therefore, it is necessary to provide a new single-layer capacitive touch screen process and an electronic device processing method using the touch screen.

In order to overcome the problem of poor manufacturing of the single-layer capacitive touch screen of the prior art, the present invention provides a single-layer capacitive touch screen manufacturing process with lower cost and high yield and an electronic device using the touch screen Equipment processing method.

The technical solution of the present invention is to provide a single-layer capacitive touch screen manufacturing process, which includes the following steps: Step S1: providing a glass substrate; Step S2: CNC pre-processing the glass substrate, on the glass substrate Forming the end product outline contour groove; step S3: strengthening the glass substrate; step S4: surface treating the glass substrate; step S5: plating the ITO conductive film to the glass substrate; step S6: forming an electrode pattern on the ITO conductive film Step S7: forming a conductive line and forming a circuit interface end at one end of the glass substrate; step S8: cutting the glass substrate; step S9: CNC edging; and step S10: bonding the FPC to the circuit interface end of the glass substrate.

Preferably, in step S2, the thickness of the groove processing is 1/4-1/2 of the thickness of the glass substrate.

Preferably, in step S2, the contoured groove is consistent with the finished product shape to be processed, and is performed at a ratio of 1:1.

Preferably, in step S2, after the CNC processing of the outline groove is completed, the cleaning is performed with water or an air gun.

Preferably, in step S3, organic chemicals are applied to the profiled grooves outside the glass substrate before the glass substrate is fed into the strengthening furnace for strengthening.

Preferably, in step S8, the glass substrate needs to be turned over, that is, the side having the groove is set downward, and the shape setting before cutting is 0.01-0.05 mm smaller than the original shape.

Preferably, in step S6, a plurality of touch-sensitive electrode patterns are formed on the ITO conductive film, and when the ITO conductive film is a layer, the plurality of touch-sensitive electrode patterns are a diamond pattern or a strip pattern, when the ITO When the conductive film is two layers, the plurality of touch-sensitive electrode patterns are a mesh pattern.

Preferably, in step S7, a metal layer is plated on the glass substrate and the metal layer is etched by an etching process to form the conductive line, and a circuit interface end is formed at one end of the glass substrate.

The technical solution of the present invention is to provide another electronic device processing method using a single-layer capacitive touch screen, which comprises a single-layer capacitive touch screen, and a mobile phone or tablet module. The layer capacitive touch screen manufacturing process comprises the following steps: Step S1: providing a glass substrate; Step S2: CNC pre-processing the glass substrate, forming a terminal product outline groove on one side of the glass substrate; Step S3: strengthening the a glass substrate; step S4: surface treating the glass substrate; step S5: plating an ITO conductive film to the glass substrate; step S6: forming an electrode pattern on the ITO conductive film; and step S7: fabricating a conductive line at one end of the glass substrate Forming a circuit interface end; step S8: cutting the glass substrate; step S9: CNC edging; and step S10: bonding the FPC to the circuit interface end of the glass substrate.

Preferably, the method further comprises the step of assembling the single-layer capacitive touch screen to the display module of the mobile phone or the tablet.

Compared with the prior art, the single-layer capacitive touch screen manufacturing process of the present invention and the electronic device processing method using the single-layer capacitive touch screen use a depth of a part of the glass CNC in advance and then strengthen the processing. After the processing, the single-layer capacitive touch screen will not lose its strength. The manufacturing process is easy to process, the strength is not lost, and no additional precision equipment is needed. In addition, after the groove is formed, the process is particularly cleaned by using water or an air gun, thereby reducing the rupture of the product which is generally cleaned by ultrasonic cleaning. Again, the pre-processing of the process The processing groove is less than or equal to half the thickness of the glass substrate, so that the crack caused by the hard force which cannot be properly discharged during the subsequent strengthening process can be effectively avoided. Moreover, before the strengthening step, the process is to apply organic chemicals to the grooves to effectively protect the glass substrate from chemical changes during the strengthening process. Further, in the cutting step, the glass substrate is turned over, that is, the side having the groove is set downward, and when the appearance before cutting is set, it must be 0.01-0.05 mm smaller than the original shape, that is, The cutting edge is 0.01-0.05 mm smaller than the outer shape of the product, which can effectively prevent the portion of the original groove edge from being reinforced when the secondary CNC is edged. At the same time, the manufacturing method of the capacitive touch screen provided by the invention only needs to etch the ITO line once in a single layer, and the process involved, the yield can be greatly improved, and the cost is reduced. In addition, because it is only a single-sided etched trace, a simple lithography production line can produce such functional glass, which solves the bottleneck that the current capacitive touch screen needs to rely on a high lithography production line.

1 is a flow chart of a single-layer capacitive touch screen manufacturing process according to a first embodiment of the present invention.

2 is a flow chart of a method for processing an electronic device using the single-layer capacitive touch screen shown in FIG. 1 according to a second embodiment of the present invention.

The present invention will be further described in detail below with reference to the drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1 is a method for fabricating an electric layer capacitive touch screen according to a first embodiment of the present invention, which includes the following steps: Step S101: providing a glass substrate; Step S102: CNC pre-processing the glass substrate, through CNC Equipment in the glass The outer contour groove of the end product is pre-machined on one side of the glass substrate. First, the machining path of the CNC equipment is set, and the processing path is consistent with the finished product shape to be processed, and is performed at a ratio of 1:1, and the CNC is outside. The thickness of the type processing is 1/4-1/2 of the thickness of the glass substrate, and the thickness is not more than 1/2, that is, it is necessary to retain a thickness of at least 1/2 or more when the outline groove is completed. After the CNC treatment, the cleaning is performed with water or air gun; step S103: strengthening the glass substrate, and the glass substrate is subjected to the first CNC external processing, that is, the glass substrate is sent to the strengthening furnace for strengthening treatment, and the glass substrate is fed. Before the furnace is strengthened, an organic chemical is applied to the groove of the glass substrate to protect the groove on the glass substrate from chemical change during strengthening; step S104: surface treating the glass substrate; step S105: electroplating ITO conductive film to the glass substrate, the surface of the substrate is plated with one or two transparent conductive films, namely ITO (full name: Indium Tin Oxides, Chinese: indium tin oxide); step S106: in the ITO conductive film Forming an electrode pattern, forming a plurality of touch-sensitive electrode patterns on the ITO conductive film, the pattern may be a diamond pattern or a strip pattern or a mesh pattern, and when the ITO conductive film is a layer, the plurality of touch-sensitive electrode patterns a diamond pattern or a strip pattern, when the ITO conductive film is two layers, the plurality of touch-sensitive electrode patterns are a mesh pattern; Step S107: plating a metal layer on the glass substrate; Step S108: at the metal Conducting a conductive line on the layer, the circuit is formed by etching the metal layer by etching, and forming a circuit interface end at one end of the glass substrate; Step S109: cutting the glass substrate, in this step, the glass substrate needs to be turned over, that is, having a concave The side of the groove is set downward, and the shape of the groove before cutting is 0.01-0.05mm smaller than the original shape, that is, the cutting edge is 0.01-0.05mm smaller than the outer shape of the product, of which 0.05 is the most Preferably, step S110: CNC edging the glass substrate; and step S111: bonding (Fonding) FPC, bonding FPC by ACF (full name: Anisotropic Conductive Film, Chinese: anisotropic conductive film) The PMMA substrate corresponds to the interface end of the circuit.

Compared with the prior art, the single-layer capacitive touch screen manufacturing process of the present invention adopts the depth of a part of the glass CNC in advance and then strengthens the processing, so the single-layer capacitive touch screen intensity after processing is not It will be lost, the production process is easy to process, the strength will not be lost, and no additional precision equipment is needed. In addition, after the groove is formed, the process is particularly cleaned by using water or an air gun, thereby reducing the rupture of the product which is generally cleaned by ultrasonic cleaning. Moreover, the pre-machined groove of the processing process is less than or equal to half of the thickness of the glass substrate, so that the crack caused by the hard force that cannot be properly discharged during the subsequent strengthening process can be effectively avoided. Moreover, before the strengthening step, the process is to apply organic chemicals to the grooves to effectively protect the glass substrate from chemical changes during the strengthening process. Further, in the cutting step, the glass substrate is turned over, that is, the side having the groove is set downward, and when the appearance before cutting is set, it must be 0.01-0.05 mm smaller than the original shape, that is, The cutting edge is 0.01-0.05 mm smaller than the outer shape of the product, which can effectively prevent the portion of the original groove edge from being reinforced when the secondary CNC is edged. At the same time, the manufacturing method of the capacitive touch screen provided by the invention only needs to etch the ITO line once in a single layer, and the process involved, the yield can be greatly improved, and the cost is reduced. In addition, because it is only a single-sided etched trace, a simple lithography production line can produce such functional glass, which solves the bottleneck that the current capacitive touch screen needs to rely on a high lithography production line.

Referring to FIG. 2, the present invention provides a method for processing an electronic device using the single-layer capacitive touch screen, which includes the following steps: Step S201: providing a glass substrate; Step S202: CNC pre-processing the glass substrate, and passing the CNC The device pre-processes the outline contour groove of the end product on the side of the glass substrate, first sets the processing path of the CNC device, and the processing path is consistent with the finished product shape to be processed, and is performed at a ratio of 1:1, and The thickness of the CNC profile processing is 1/4-1/2 of the thickness of the glass substrate, and the thickness is not more than 1/2, that is, it is necessary to retain at least 1/2 thickness, when the appearance is completed. After the CNC processing of the contour groove, the cleaning is performed with water or air gun; step S203: strengthening the glass substrate, and the glass substrate is subjected to the first CNC external processing, that is, the glass substrate is sent to the strengthening furnace for strengthening treatment, and the glass is Before the substrate is fed into the strengthening furnace, organic chemicals need to be applied to the grooves of the glass substrate to protect the grooves on the glass substrate from chemical replacement during strengthening; Step S204: surface treating the glass substrate; step S205: plating an ITO conductive film to the glass substrate, and plating one or two transparent conductive films on the surface of the substrate, namely ITO (full name: Indium Tin Oxides, Chinese: indium tin oxide) Step S206: forming an electrode pattern on the ITO conductive film, and forming a plurality of touch-sensitive electrode patterns on the ITO conductive film, the pattern may be a diamond pattern or a strip pattern or a mesh pattern, when the ITO conductive film is In a layer, the plurality of touch-sensitive electrode patterns are a diamond pattern or a strip pattern. When the ITO conductive film is two layers, the plurality of touch-sensitive electrode patterns are a mesh pattern; and step S207: on the glass substrate Electroplating a metal layer; step S208: forming a conductive line on the metal layer, the circuit is etched by etching to form the circuit layer, and forming a circuit interface end at one end of the glass substrate; step S209: cutting the glass substrate, in this step The glass substrate needs to be turned over, that is, the side with the groove is set downward, and the shape setting before cutting is smaller than the original shape. 0.01-0.05mm, that is, the cutting edge is 0.01-0.05mm smaller than the product appearance, wherein 0.05 is the best; step S210: CNC grinding the glass substrate; and step S211: bonding (Fonding) FPC, using ACF ( Full name: Anisotropic Conductive Film, Chinese: anisotropic conductive film) Bonding FPC to the corresponding circuit interface end of the PMMA substrate. Step S212: assembling the single-layer capacitive touch screen to a mobile phone or tablet module, providing a mobile phone or tablet module, each of which includes a display module, and assembling the single-layer capacitive touch screen Complete the assembly of electronic devices to the display module of the mobile phone or tablet.

Compared with the prior art, the single-layer capacitive touch screen manufacturing process of the present invention adopts the depth of a part of the glass CNC in advance and then strengthens the processing, so the single-layer capacitive touch screen intensity after processing is not It will be lost, the production process is easy to process, the strength will not be lost, and no additional precision equipment is needed. In addition, after the groove is formed, the process is particularly cleaned by using water or an air gun, thereby reducing the rupture of the product which is generally cleaned by ultrasonic cleaning. Furthermore, the pre-machined groove of the processing process is less than or equal to half the thickness of the glass substrate, so It can effectively avoid the crack caused by the hard force that cannot be properly discharged during the subsequent strengthening process. Moreover, before the strengthening step, the process is to apply organic chemicals to the grooves to effectively protect the glass substrate from chemical changes during the strengthening process. Further, in the cutting step, the glass substrate is turned over, that is, the side having the groove is set downward, and when the appearance before cutting is set, it must be 0.01-0.05 mm smaller than the original shape, that is, The cutting edge is 0.01-0.05 mm smaller than the outer shape of the product, which can effectively prevent the portion of the original groove edge from being reinforced when the secondary CNC is edged. At the same time, the manufacturing method of the capacitive touch screen provided by the invention only needs to etch the ITO line once in a single layer, and the process involved, the yield can be greatly improved, and the cost is reduced. In addition, because it is only a single-sided etched trace, a simple lithography production line can produce such functional glass, which solves the bottleneck that the current capacitive touch screen needs to rely on a high lithography production line.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalents, and improvements made within the principles of the present invention should be included in the scope of the present invention.

Claims (10)

A single-layer capacitive touch screen manufacturing process includes the following steps: Step S1: providing a glass substrate; Step S2: CNC (Computerized Numerical Control) pre-processing the glass substrate, forming a terminal product appearance on one side of the glass substrate a contour groove; step S3: strengthening the glass substrate; step S4: surface treating the glass substrate; step S5: plating an ITO conductive film to the glass substrate; step S6: forming an electrode pattern on the ITO conductive film; step S7: making a a conductive line, and forming a circuit interface end at one end of the glass substrate; step S8: cutting the glass substrate; step S9: CNC edging; and step S10: bonding the FPC to the circuit interface end of the glass substrate. The single-layer capacitive touch screen manufacturing process according to claim 1, wherein in the step S2, the thickness of the groove processing is 1/4-1/2 of the thickness of the glass substrate. The single-layer capacitive touch screen manufacturing process according to claim 1, wherein in step S2, the outer contour groove is consistent with the finished product shape to be processed, and is 1:1. The ratio is carried out. The single-layer capacitive touch screen manufacturing process according to claim 1, wherein in step S2, after the CNC processing of the outline groove is completed, the cleaning is performed with water or an air gun. The single-layer capacitive touch screen manufacturing process according to claim 1, wherein in step S3, a contour groove is required outside the glass substrate before the glass substrate is sent to the strengthening furnace for strengthening. Apply organic chemicals. The single-layer capacitive touch screen manufacturing process according to claim 1, wherein in step S8, the glass substrate needs to be turned over, that is, the side with the groove is set downward, and the process is performed. When setting the shape before cutting, it must be 0.01-0.05mm smaller than the original shape. The single-layer capacitive touch screen manufacturing process according to claim 1, wherein in step S6, a plurality of touch-sensitive electrode patterns are formed on the ITO conductive film, when When the ITO conductive film is a layer, the plurality of touch-sensitive electrode patterns are a diamond pattern or a strip pattern. When the ITO conductive film is two layers, the plurality of touch-sensitive electrode patterns are a mesh pattern. The single-layer capacitive touch screen manufacturing process according to claim 1, wherein in step S7, a metal layer is electroplated on the glass substrate and the metal layer is etched by an etching technique to form the conductive line. And forming a circuit interface end at one end of the glass substrate. An electronic device processing method using a single-layer capacitive touch screen, comprising a single-layer capacitive touch screen, and a mobile phone or tablet module, wherein the single-layer capacitive touch screen electronic device The processing method includes a single-layer capacitive touch screen manufacturing process as claimed in any one of claims 1 to 8. An electronic device processing method using a single-layer capacitive touch screen according to claim 9, wherein the method further comprises assembling the single-layer capacitive touch screen to a display mode of the mobile phone or the tablet computer. The assembly steps of the group.