TWI465985B - Touch panel and manufacturing method - Google Patents

Description

Touch panel and method of manufacturing same

The invention provides a touch panel and provides a touch panel with better mass production yield and rapid mass production, and a manufacturing method thereof.

In today's market for consumer electronics products, portable electronic products such as personal digital assistants (PDAs), mobile phones, notebooks, and tablet PCs have been widely used. A touch panel is used as an interface tool for data communication. In addition, since the design of electronic products is currently in the direction of light, thin, short and small, there is not enough space on the product to accommodate traditional input devices such as keyboards and mice, especially in the demand for tablet PCs that are designed with humanity in mind. Next, touch panels have become one of the key components. In addition to the multi-level menu design requirements, the touch panel can also have the functions of keyboard, mouse and other humanized operation modes.

At present, the outermost layer of the touch panel structure and the environment is usually a tempered glass substrate, and then a touch sensing layer is adhered. For example, indium tin oxide (ITO) is used as a conductive material to integrate the touch panel. Then, it is combined with the display panel (ie, the backlight module) to form a complete touch display device. As described above, the glass substrate and the touch sensing layer are pasted together by an optical glue. In addition, at the periphery of the glass substrate, an image layer black frame is often printed by ink screen printing to shield the wiring. However, since the screen printing is one-by-one printing, the mass production efficiency is poor, however, the net The printing of the screen is not easy to control the thickness uniformity of the image layer due to the characteristics of the screen opening rate, the dry plate or the ink or the like, so that the printing quality is unstable and the yield is lowered.

It is an object of the present invention to provide a touch panel which is excellent in mass production yield and which can be mass-produced rapidly and a method of manufacturing the same.

In order to achieve the above objective, the touch panel of the present invention comprises: a first transparent substrate, a patterned light shielding layer, a touch sensing structure, and a plastic substrate, wherein the patterned light shielding layer is disposed on the first transparent substrate a lower surface, wherein the touch sensing structure is disposed under the patterned light shielding layer, and the touch sensing structure is provided with one of a transparent sensing series and an upper peripheral line connected to each other, and the upper peripheral line The plastic substrate is integrally formed on the upper surface of the first transparent substrate.

The above further includes a hard coating layer disposed under the patterned light shielding layer.

To achieve the above object, an easy adhesion layer is provided between the first transparent substrate of the present invention and the plastic substrate.

To achieve the above object, the patterned light-shielding layer of the present invention is relatively located at the peripheral frame edge of the first transparent substrate.

In order to achieve the above object, the touch sensing structure of the present invention further has a lower transparent sensing series and a lower peripheral line formed on a second transparent substrate, and the second transparent substrate is adhered to the hardened coating. The upper transparent sensing series and the lower transparent sensing series are interlaced, and the lower peripheral line is located below the patterned light shielding layer.

The method for manufacturing the touch panel of the present invention includes: providing a first transparent substrate; forming a patterned light shielding layer on the lower surface of the first transparent substrate; forming a touch sensing structure. The surface of the patterned light-shielding layer forms a transparent sensing series and an upper peripheral line connected to each other, and the upper peripheral circuit is located below the patterned light-shielding layer; on the upper surface of the first transparent substrate.

The method for manufacturing the touch panel of the present invention includes: providing a first transparent substrate; forming a patterned light shielding layer, and printing a patterned light shielding layer on the lower surface of the first transparent substrate; forming a touch a sensing structure, a transparent sensing series and an upper peripheral line are formed on the surface of the patterned light shielding layer, and the upper peripheral circuit is located below the patterned light shielding layer; and a second transparent substrate is provided to form a The transparent sensing series and the lower peripheral line are on the second transparent substrate; the first transparent substrate and the second transparent substrate are bonded in a roll-to-roll bonding manner; and the first transparent substrate is The upper surface integrally forms a plastic substrate.

To achieve the above object, the present invention can form an easy-adhesion layer on the upper surface of the first transparent substrate before forming the plastic substrate.

In order to achieve the above object, the present invention further comprises a hardened coating layer formed on the surface of the patterned light shielding layer before forming the touch sensing structure.

As shown in the first figure, it is a schematic diagram of a touch panel provided by the first embodiment of the present invention. The touch panel 1 of the present invention comprises: a first transparent substrate 10, a patterned light shielding layer 20, a touch sensing structure 30, and a plastic substrate 40 having a corresponding upper surface 11 and a lower surface 12, patterned cover The light layer 20 is disposed on the lower surface 12 of the first transparent substrate, and is located at a peripheral edge of the first transparent substrate 20. The touch sensing structure 30 is disposed under the patterned light shielding layer 20, and the touch sensing structure 30 is provided with a transparent sensing series 31 and an upper peripheral line 32 connected to each other, and the upper peripheral line 32 is relatively located in the pattern. Below the shading layer 20. The upper peripheral line 32 is covered by the patterned light shielding layer 20. The touch sensing structure 40 can be a capacitive touch sensing structure and a resistive touch sensing structure. The plastic substrate 40 is injection molded on the upper surface 11 of the first transparent substrate. As a protective layer, since the plastic substrate has plasticity, various shapes and outer frames can be formed through the injection molding method, so that the appearance can be variously designed. Improve design limitations that are difficult for traditional full-plane glass processing.

FIG. 2 is a schematic view showing a touch panel provided by a second embodiment of the present invention. The touch panel 1 of the present invention comprises: a first transparent substrate 10, a patterned light shielding layer 20, a touch sensing structure 30, a plastic substrate 40, and a hardened coating layer 50. The patterned light shielding layer 20 is disposed on the first transparent layer. The lower surface 12 of the substrate may be located at a peripheral edge of the first transparent substrate 20. The hard coat layer 50 is located under the patterned light shielding layer 20. The touch sensing structure 30 is disposed under the hard coat layer 50.

At the time of production, the first transparent substrate 10 is first provided. Forming the light-shielding layer 20 on the lower surface 12 of the first transparent substrate. As shown in FIG. 3(A), the patterned light-shielding layer 20 may be a design pattern printed by at least one layer of ink, which may be formed by printing. Alternatively, it can be formed by photoresist lithography. Forming a touch sensing structure on the surface of the patterned light shielding layer 20, and sequentially forming a transparent conductive layer 33 and a metal layer 34 on the surface of the patterned light shielding layer 20, as shown in the third figure (B), wherein The manner in which the transparent conductive layer and the metal layer are formed may be, for example, physical vapor deposition or chemical vapor deposition. Patterning is further performed to form a transparent sensing series 31 and an upper peripheral line 32 which are connected to each other, as shown in the third figure (C), and the upper peripheral line 32 is located below the patterned light shielding layer 20. The patterning process can be a roll-to-roll yellow process or a printing etch process. Finally, the surface 11 of the first transparent substrate is directly ejected to form a plastic substrate 40. As shown in FIG. 3D, the first transparent substrate 10 can be placed in the mold 60, and the molded plastic is integrally injected by the mold. The substrate 40; of course, there may be different integral molding methods according to requirements, such as: precision injection molding, micro injection molding, micro-injection molding, micro-structure injection molding, fine-tuning injection compression molding, micro Injection molding, precision lamination resin molding, precision deposition (Deposition) resin molding, etc.

Moreover, before the plastic substrate 40 is formed, the easy-adhesion layer 70 can be formed on the upper surface 11 of the first transparent substrate, as shown in the third embodiment of the fourth figure, which can be further strengthened by the easy-adhesion layer 70. The bonding stability between the first transparent substrate 10 and the plastic substrate 40 is achieved.

As shown in the fifth embodiment, the touch sensing structure further has a lower transparent sensing series 35 and a lower peripheral line 36 formed on the second transparent substrate 37, and the second transparent substrate 37 is pasted. Below the upper transparent sensing series 31, the upper transparent sensing series 31 and the lower transparent sensing series 35 are interlaced with each other, and the lower peripheral line 36 is located opposite the patterned light shielding layer 20. When making, please refer to the sixth figure at the same time, and also provide the first transparent substrate 10 first. A patterned light shielding layer 20 is formed on the first transparent substrate lower surface 12. Forming a touch sensing structure on the surface of the patterned light shielding layer 20, further comprising forming a hardened coating layer on the surface of the patterned light shielding layer 20, forming a hardened coating 50 on the surface of the patterned light shielding layer 20, The coating 50 covers the patterned light-shielding layer 20 and the first transparent substrate 10, so that the gap between the patterned light-shielding layer 20 and the first transparent substrate 10 can be made flat, so that the subsequent process can be easily fabricated. A transparent conductive layer (not shown) and a metal layer (not shown) are formed on the surface of the hard coat layer 50, and patterned to form the upper transparent sensing series 31 and the upper peripheral line 3. Further, a second transparent substrate 37 is provided, and a transparent conductive layer (not shown) and a metal layer (not shown) are sequentially formed on the second transparent substrate 37, and then patterned to form a lower transparent sensing series 35. And the lower peripheral line 36 is on the second transparent substrate 37. The patterning process can be a roll-to-roll yellow process or a printing etch process. The upper transparent sensing series 31 and the lower transparent sensing series 35 are interlaced with each other. The first transparent substrate 10 and the second transparent substrate 37 are bonded by the adhesive layer 80 in a roll-to-roll bonding manner. The adhesive layer 80 further has an opening for electrically connecting the upper gold finger and the lower gold finger to the FPC.

Although the present invention has been disclosed above by way of example, it is not intended to limit the invention. The scope of the present invention is defined by the scope of the claims, and the scope of the invention is intended to be limited by the scope of the invention.

1‧‧‧ touch panel

10‧‧‧First transparent substrate

11‧‧‧ upper surface

12‧‧‧ Lower surface

20‧‧‧ patterned blackout layer

30‧‧‧Touch sensing structure

31‧‧‧Transparent sensing series

32‧‧‧Upper peripheral lines

33‧‧‧Transparent conductive layer

34‧‧‧metal layer

35‧‧‧Transparent transparent sensing series

36‧‧‧Lower peripheral lines

37‧‧‧Second transparent substrate

40‧‧‧Plastic substrate

50‧‧‧ hardened coating

60‧‧‧Mold

70‧‧‧Easy layer

80‧‧‧Adhesive layer

The first figure shows the structure of the first embodiment of the touch panel of the present invention.

The second figure shows a schematic structural view of a second embodiment of the touch panel of the present invention.

The third diagrams (A) to (D) show the structure of the manufacturing method of the touch panel of the present invention.

The fourth figure shows the structure of the third embodiment of the touch panel of the present invention. Figure.

FIG. 5 is a schematic structural view of a fourth embodiment of the touch panel of the present invention.

FIG. 6 is a structural exploded view showing a fourth embodiment of the touch panel of the present invention.

1‧‧‧ touch panel

10‧‧‧First transparent substrate

11‧‧‧ upper surface

12‧‧‧ Lower surface

20‧‧‧ patterned blackout layer

30‧‧‧Touch sensing structure

31‧‧‧Transparent sensing series

32‧‧‧Upper peripheral lines

40‧‧‧Plastic substrate

Claims (11)

A touch panel includes: a first transparent substrate having a corresponding upper surface and a lower surface; a patterned light shielding layer disposed on the lower surface; and a touch sensing structure disposed on the patterned shading Under the layer, the touch sensing structure is provided with one transparent sensing series and one upper peripheral line connected to each other, and the upper peripheral circuit is located below the patterned light shielding layer; and a plastic substrate, An integrally formed plastic substrate is on the upper surface of the first transparent substrate. The touch panel of claim 1, further comprising a hardened coating disposed under the patterned light shielding layer. The touch panel of claim 1, wherein an easy adhesion layer is disposed between the first transparent substrate and the plastic substrate. The touch panel of claim 1, wherein the patterned light shielding layer is located at a peripheral edge of the first transparent substrate. The touch panel of any one of claims 1 to 4, wherein the touch sensing structure further has a lower transparent sensing series and a lower peripheral line formed on a second transparent substrate. The second transparent substrate is adhered to the upper transparent sensing series, the upper transparent sensing series and the lower transparent sensing series are interlaced, and the lower peripheral circuit is opposite to the patterned light shielding layer. Below. A method for manufacturing a touch panel, comprising: providing a first transparent substrate; forming a patterned light shielding layer on a lower surface of the first transparent substrate; Forming a touch sensing structure, forming a transparent sensing series and an upper peripheral line on the surface of the patterned light shielding layer, wherein the upper peripheral circuit is opposite to the patterned light shielding layer; and the first transparent The upper surface of the substrate integrally forms a plastic substrate. A method for manufacturing a touch panel, comprising: providing a first transparent substrate; forming a patterned light shielding layer on a lower surface of the first transparent substrate; forming a touch sensing structure, forming a mutual surface on the surface of the patterned light shielding layer Connecting a transparent sensing series and an upper peripheral line, wherein the upper peripheral circuit is located below the patterned light shielding layer; providing a second transparent substrate to form a transparent sensing series and a lower peripheral line in the second a transparent substrate; the first transparent substrate and the second transparent substrate are bonded in a roll-to-roll manner; and the plastic substrate is integrally formed on the upper surface of the first transparent substrate. The method of manufacturing a touch panel according to claim 6 or 7, wherein the integrally formed plastic substrate forms an easy-adhesion layer on the upper surface of the first transparent substrate. The method of manufacturing a touch panel according to claim 6 or claim 7, further comprising forming a hardened coating on the surface of the patterned light shielding layer before forming the touch sensing structure. The method for manufacturing a touch panel according to claim 6 or 7, wherein the method of forming the patterned light shielding layer is a printing method. The method for manufacturing a touch panel according to claim 6 or 7, wherein the method of forming the patterned light shielding layer is a photoresist lithography method.