TWI235623B - Manufacturing method for arranging electric circuit on touch panel using metal filming technology - Google Patents

Abstract

The present invention provides a manufacturing method for arranging electric circuit on a touch panel using metal filming technology, which employs the metal filming technology to uniformly deposit the conductive metal onto the transparent conductive layer of a glass substrate at the positions close to the edges to form the required electric circuit. Thus, the present invention can effectively improve the uniformity of the circuit depth, provide higher hardness, and better weather durability and chemical resistance.

Description

1235623 Amendment 92131635 V. Description of the invention (1) [Technical field to which the invention belongs] • The present invention is a manufacturing method for laying electrical control circuits on the conductive glass of a touch panel, especially a method using metal coating technology to uniformly conduct conductive metals. Sentences are stacked on a transparent conductive layer of a glass substrate near its edges to form a manufacturing method of a desired electrical control circuit. [Previous technology] In recent years, touch-sensitive human-machine interfaces, such as: Touch Panel, have been widely used in various electronic products, such as: Global Positioning System (GPS), personal digital Assistants (pda), cellular phones, and hand-held PCs to replace traditional input devices (such as keyboards and mice). This design change significantly not only enhances The human-machine interface affinity of these electronic devices also frees up more space for the installation of large display panels because of the omission of traditional input devices, making it easy for users to browse data. Traditionally, the touch technology used in touch panels is divided into optical, ultrasonic, infrared, capacitive, and resistive types according to their operating principles. However, resistive types are still used today. (Film on Glass) touch technology is most widely used in various terminal products. Refer to Figure 1 for a traditional resistive touch panel. This type of touch panel is sensed by voltage detection. A transparent conductive glass (ITO Glass) 10 covered with a conductive layer of tin oxide (IT0) and a transparent conductive film (ITO Film) 20 made of indium tin oxide (IT0) material, wherein the transparent conductive glass 1〇 And the film 20, the screen printing technology is used to print a conductive silver paste (si Iver paste) to each of the glass 10 and the film 20 adjacent to its edge.

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Set 'to form the required electrical control lines 1 1 and 21, and then, on each of the electrical control lines 11 and 21, sequentially form an insulating layer 12, 22 and a bonding layer 13, 23, and transparently A plurality of spaced-apart dot spacers 30 are placed between the conductive glass 10 and the thin film 20, and flexible cables 1 1 1 and 2 1 1 are placed on each of the electric control lines 1 丨 and 21, that is, The transparent conductive glass 10 and the thin film 20 can be sealed and integrated by using each of the bonding layers 3, 2 3 to make the required touch panel. 0 When the user directly touches the transparent conductive with a finger, pen or other medium When a certain position on the film 20 is formed, the transparent conductive film 20 at that position will be electrically connected with the transparent conductive glass 10, and a potential difference will be generated at the corresponding position. The control circuit of the circuit board is Lines n and 21 j further calculate the coordinate values of the touched positions from the different potential differences sensed by the electric control lines 11 and 21, and display a cursor at the corresponding coordinate position of the touch panel. With the matching instructions, the transparency on the upper axis of the glass film is different from zero. In general, the traditional resistive touch panel can be divided into four wires according to the disconnection of its electrical control circuit. Five-wire or six-wire different line types are used as an example. Refer to Figure 2. The four electrical control lines of the touch panel in the X and γ axis directions are all transparent and conductive glass substrates. The layer is adjacent to its periphery, and its transparent conductive thin layer is only provided with one electrical control line for sampling X and Y voltage values, a total of 5 electrical control lines. When the user touches the position of point P on the touch panel with a finger or a pen, the control circuit will supply 5 volts of power to the two electrical control lines 1 and 2 on the conductive layer of the glass substrate, and one electrical control line 4 and 5 In the grounded state (gr 0 und, ie, electricity, etc.) 'At this time', the contact position will change due to impedance changes, which will produce

Page 6 1235623 j No. 9213〗 f ^ V. Description of the invention (3) J This transmission: The electrical control circuit on the conductive film can sample the voltage value of Vpy, otherwise 'when the control circuit is responsible for "The second special power supply, and make the other two electronic control lines 1 and 5 = when the connection is also evil (ground '# voltage is zero), the electrical control line of the transparent conductive thin S will sample to the voltage value of Vpx, etc. Vpx and Vpy = After the control circuit's calculation and comparison, you can quickly know the coordinate position of the? Point. ^ At present, in traditional touch panels, whether it is four-wire, five-wire, or linear 4 The special electronic control circuits are screen printing processes that use conductive oil (silver glue) to print on the transparent conductive layer of the glass substrate through screen printing. However, due to the characteristics of the screen and ink, the imaging of these electronic control circuits Quality, there are always the following problems, which affect the performance and manufacturing surface of the touch panel: For this reason, the angle W1, the uniformity and stability of the resistance is not easy to control: it can be known from the calculation formula of the lower resistance: $ 4 电 R = P * L / A = p * L / dh, where R is the resistance of the wire; p is the electrical control wiring material The specific resistance coefficient (specific resistance I is the cross-sectional area of the electronic control line; d is the width of the line; h is the thickness of the line. If the material and wiring type of the electrical control line are fixed, it will affect the resistance of these electrical control lines. The parameter is its width and thickness, which means that a uniform line is obtained, and it is the key to obtain a stable resistance value. However, when the conductive ink (silver glue) is printed to the transparent conductive layer using the traditional screen printing process' Due to the aperture ratio of the screen mesh, the ink area under the conductive ink is generally less than 50% of the screen area, resulting in the unevenness of the corresponding mesh position on the printed surface of these electronic control circuits. In addition, plus five, the description of the invention (4) The dry version of the DJ or the ink-spraying of the stomach, all make these targeted for reporting; especially the touch panel printing process produced by the manufacturing process is in Jiang Yudao The adhesion between the surfaces of electric glass is not #: Traditional screen printing is "". After printing from ink (silver glue) to the transparent conductive layer, it is dried after drying. The electrical control circuit is tested by a standard stylus hardness tester. This kind of electric control j ί :::; force only Withstand _ the wrong pen hardness' over electricity # 3 winding: poor weather resistance and chemical resistance: the silver glue formed by the traditional screen printing process, the composition contains about ⑽ solvent, so that the silver glue can be in a state, ί During the irritable process, the solvent will dominate as the temperature rises, and it will be attached to the transparent conductive layer of the glass substrate. The electrical layer is adhered to the transparent guide ring by the adhesive force of the adhesive. After the electric control circuit is dry, it will stick to silver when the process or tincture or clear gas will reduce the adhesive force of the colloid: ί The adhesion on the transparent conductive layer will appear as the force of the colloid decreases. The problem of unstable quality. Production 4. High processing difficulty and difficult to control quality: The silver glue of "=" is a heat curing type, and silver glue can increase printing difficulty and quality control. = ί; Γ ^ A waste of human power and man-hours, and the bottleneck is limited, so the touch panel made cannot always be 1235623

According to the above description, how to develop a better process to produce high-quality control circuits ’has become an important issue for today ’s touch panel design and manufacturing manufacturers. [Summary of the Invention] ^ Youzhong used the traditional screen printing process to print conductive ink (silver glue) on the transparent conductive layer of a glass substrate. Many things happened. Panel manufacturing experience and technology, the above-mentioned lack of careful study of various solutions, and after continuous research and improvement, finally developed the design of the present invention using a metal-plated field 1 触控 touch panel installation of electrical control circuit manufacturing Method, which is a method of coating technology. 1. Conductive metal is evenly deposited on a glass substrate. The transparent layer is located near the edge of the electrical layer to form the required electrical control circuit. @ 1 improves the uniformity of the circuit thickness, and Make it have higher hardness, and the weather resistance and chemical resistance of pregnancy.詈 Μ ί The review committee can further understand and understand the purpose, shape, structure, and effect of the present invention, and hereby give examples to illustrate the details below. [Embodiment]

The present invention is a method for laying electricity on a touch panel using metal coating technology: belonging to 21 manufacturing method. The method is to use metal coating technology to deposit conductive conductive materials on a conductive glass of a touch panel adjacent to its edge. = The required electrical control circuit. In a preferred embodiment of the present invention, it is shown that the method includes the following steps: 1235623 _ plug No. 92131635__ year month day _ correction ___ 5. Description of the invention (6) (50 0 1) First, refer to the section As shown in FIG. 4, a transparent conductive glass 40 for making a touch panel is first sent to a washing machine 60. The conductive glass 40 includes a glass substrate 41, and the glass substrate 41 is covered with an oxide. The transparent conductive layer 42 of indium tin (ITO) material, the cleaning machine 60 is used to clean the surface of the transparent conductive layer 42 (Spray rinsing), scrubbing (brushing) and blowing (blowing) to remove the Impurities or dirt on the surface of the transparent conductive layer 42; (5 0 2) 后 After the cleaning is completed, apply printing technology to the 'preserved central position' on the transparent conductive layer 42 as shown in FIG. 5 and apply An anti-etching ink layer 4 3; (503) 嗣, send the conductive glass 40 into an etching tank 70, and refer to FIG. 6 to perform the post-etching treatment on the transparent conductive layer 4 2 on the glass substrate 41 The transparent conductive layer 42 is etched near its periphery without applying the anti-etching ink layer 43. (504) The conductive glass 40 is sent to an ink-removing tank 80, as shown in FIG. 7. By the ink-removing tank 80, the anti-money engraved ink coated on the surface of the transparent conductive layer 4 2 is shown. Layer 4 3 is removed; (5 0 5) 俟 After the deinking process is completed, a developing technology is used to form a mask 44 on the glass substrate 41 and the transparent conductive layer 42, as shown in FIG. 8. Only the predetermined part 4 41 of the electric control circuit to be set is exposed; (506) 嗣 'Then the conductive glass 40 is sent to a basement room 90, refer to FIG. 9' for the electric control circuit to be set The predetermined part 4 41 is plated to make the conductive metal 91 丨 (such as silver ions) in the target material 91 (target, such as silver) free from the impact, and uniformly adhere to the predetermined part 4 41; (507 ) The conductive metal 911 deposited on the predetermined portion 441 is deposited 1235623 ___ Case No. 92131635 V. Description of the invention (7)

When a desired electrical control circuit is formed to a predetermined thickness, the shielding layer 44 is further removed ', that is, the required electrical control circuit 45 is formed on the conductive glass 40, as shown in FIG. 10. In this embodiment, since the electric control lines 45 are uniformly stacked from the conductive metal 9 11 contained in the target 9 丨, not only the thickness is uniform, the resistance value is stable, and the hardness is high. The electrical control circuit formed by silver is taken as an example, and it has been experimentally proven that it can pass a pencil hardness test of at least 9H. In addition: Since this embodiment is based on a metal coating technology, the conductive metal g 1 1 is directly deposited in a predetermined manner on the glass substrate 41 and the transparent conductive layer 4 2 to form a desired electrical control circuit. 45. Therefore, the electric control circuit 45 is not only stable in quality and not affected by solvents or moisture, and when it is manufactured, it only needs to set related operating equipment and equipment to set the required operating parameters to produce products of consistent quality, which is effective. It avoids the problem of excessive reliance on the skills and experience of the printing staff. In addition, in the embodiment, when the metal coating process is performed, the dry material 91 and the conductive metal 911 contained therein are not limited by the effective time of the traditional silver glue, so it can be exempted from time to time. The problems of ink and screen cleaning not only effectively improve the quality of the electrical control circuit 45 on the conductive glass 40, improve the product yield, but also greatly reduce the unnecessary waste of manpower and man-hours. > The above is only a preferred embodiment of the present invention, but when the actual yoke of the present invention is used, the material used for the transparent conductive layer is not limited to indium tin oxide material, the metal coating technology and the target used The materials are not limited to sputtering technology and silver. According to the technical concept of the present invention, those who are familiar with this technology use /, dagger materials and metal coating technology, so that conductive metals are directly deposited and attached to the conductive glass by metal coating. 4 〇's predetermined position to form the required

No. j 92131 V. The electric control circuit 4 5 of the description of invention (8), all of you jg 4 »a η in Taiyanri M + ί belong to the technical model that you want to protect. The electric control circuit, " controls the performance of your mouth on the broken glass substrate near its periphery, the quality and impedance stability, and the fourth, η \ θ Υ ,, Therefore, in another preferred embodiment of the present invention, referring to ji 〇 ^. Second, when the conductive glass 40 is manufactured, the transparent conductive layer 42 of the glass substrate 41 may be adjacent to the transparent conductive layer 42 by using gold, aluminum, and copper. An electric control circuit 47 is arranged on the edge, and as for the positions near and / or on the glass substrate 41, another electronic control circuit is laid using screen printing technology and the electric control circuits 47 and 48 are arranged on the glass substrate 41. Electrically connected, so that while improving the overall performance of the touch panel, the production cost of the product can be further reduced. The above description is only the best embodiment of the present invention, but the structural features of the present invention are not limited to this. Any changes or modifications that can be easily considered by those skilled in the art in the field of the present invention can be covered. The scope of patents in this case is as follows. 1235623

[Schematic description], Figure 1 is an assembly schematic diagram of the traditional touch panel structure. The thin film of the film is a schematic diagram of conductive glass and transparent conductive plane in the first touch panel structure. FIG. 3 is a schematic diagram of a manufacturing process of a preferred embodiment of the present invention. Fig. 4 is a schematic view of cleaning conductive glass in the preferred embodiment. ~ Illustration. Figure 10 is a drawing made by the preferred embodiment. Fig. 11 is a schematic perspective view made according to another preferred embodiment of the present invention. Fig. 5 is a schematic sectional view after the layer in the preferred embodiment. Fig. 6 is a schematic diagram in the preferred embodiment. Fig. 7 is a schematic diagram in the preferred embodiment. Fig. 8 is a schematic sectional view in the preferred embodiment. FIG. 9 shows that in the preferred embodiment, conductive glass is coated with an anti-etching ink, conductive glass is etched, conductive glass is deinked, and conductive glass is coated with a masking layer, and then conductive glass is sputtered. The three-dimensional schematic of the conductive glass that breaks out of the conductive glass [Description of the main component symbols] Transparent conductive glass .............. 40 1235623 _ Case No. 92131635_ Year Month Day __ Schematic simple description ' Glass substrate .............. 41 Transparent conductive layer ... ......... 42 Insect-proof ink layer ... 43 Masking layer ... .... 44 Pre-determined position of electric control circuit ......... 441 Electric control circuit ......... ....... 4 5, 4, 7 and 4 8 washing machine .............. 60.Etching groove .............. ......... 70 Go to the ink tank ............... ........ 80 Sputtering Chamber ............ .90 9 &# ............................. 91 Conductive metal......... ................. 911 ❿

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Claims (1)

1235623 Please amend the scope of patent SR 92131635, a method for manufacturing electric control wires on the touch panel by using metal coating technology. The method includes the following steps: First, a transparent conductive glass is used to make a touch panel. 'The conductive glass includes a glass substrate, and the glass substrate is covered with a transparent conductive layer, and the surface of the transparent conductive layer 42 is cleaned, brushed, and blow-dried' to remove impurities or dirt on the surface of the transparent conductive layer 42. After the cleaning is completed, using a printing technology, an anti-etching ink layer is coated on the transparent conductive layer at a predetermined reserved central position; 嗣 'the transparent conductive layer is etched, and the glass substrate is adjacent to / 、 The transparent conductive layer surname without surrounding the anti-etching ink layer is engraved; the anti-etching ink layer coated on the surface of the transparent conductive layer is removed; 显影 After the deinking process is completed, the development technology is used again Forming a masking layer on the glass substrate and the transparent conductive layer to expose only a predetermined portion of the electric control circuit to be set; The predetermined part of the control circuit is sputtered, so that the conductive metal in the target material is dissipated by the impact and uniformly adheres to the predetermined part; 俟 The conductive metal attached to the predetermined part is deposited to a predetermined thickness to form the required electricity When the circuit is controlled, the masking layer is removed, that is, the required electrical control circuit is formed on the conductive glass. 2. The manufacturing method according to item 丨 in the scope of the patent application, wherein the transparent glass substrate is not covered with the transparent conductive layer, and another group of electrical control circuits can be arranged by using metal plating and technology. The two groups Electrical control circuit Page 15 1235623 _Case No. 92131635_ Year Month Date__ VI. The scope of patent application is in a state of mutual continuity. 3. The manufacturing method as described in item 1 of the scope of the patent application, wherein the transparent glass substrate is not covered with the transparent conductive layer, and another set of electrical control circuits can be arranged by screen printing technology. The control lines are electrically connected to each other. Mold 4. The manufacturing method as described in item 1 of the scope of patent application, wherein the transparent conductive layer may be a transparent conductive layer made of an indium tin oxide material. k 5. The manufacturing method as described in item 1 of the scope of patent application, wherein the target material may be a target material whose main component is silver. Page 16