TWI509483B - Touch panel and manufacturing method - Google Patents

Description

Touch structure and manufacturing method thereof

The invention provides a touch structure, and provides a touch structure and a manufacturing method thereof, which have the advantages of reducing the thickness of the touch structure and the liquid crystal display device, reducing the manufacturing cost, and improving the manufacturing yield of the module.

In today's consumer electronics market, portable electronic products such as personal digital assistants (PDAs), mobile phones, notebooks, and tablet PCs have been widely used. The 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. Under the touch structure has become one of the key components. In addition to the multi-level menu design requirements, the touch-sensitive structure can also have the functions of a keyboard, a mouse, etc., and a humanized operation mode such as handwriting input, especially integrating the input and output in the same interface (screen). The traits are beyond the reach of other traditional input devices. A touch display device is further provided, and a touch structure is disposed on the display device, so that the touch structure provides a touchable area according to the display image of the display device, and the touch display device is used for the user to touch according to the touch object displayed on the screen. operating.

In order to achieve the design requirements of thinner devices, the traditional touch structure design (reinforced glass/film/film, G/F/F) will lead to an increase in the overall thickness of the touch display device, resulting in poor optical effects and affecting the touch display. The appearance of the device. Change late The SITO bridge structure is adopted, and a plurality of axial (X/Y) sensing electrodes are disposed on one surface of a single substrate, and an insulating layer is used to insulate the intersections of the plurality of axial (X/Y) sensing electrodes from each other. . However, the production process of such a SITO bridge structure is complicated, the manufacturing cost is too high, and the production yield is difficult to control.

In view of the problems existing in the prior art, the present invention provides a touch structure and a manufacturing method thereof, which have the advantages of thinner device, low manufacturing cost, and high module fabrication yield.

To achieve the above objective, the touch structure of the present invention comprises: a flexible transparent substrate, a complex array sensing series, an insulating layer, and a plurality of jumper wires; wherein the flexible transparent substrate has a display area and a terminal line area, the terminal line area is located at one side of the display area, the display area has a plurality of areas; each set of sensing series has a plurality of sensing columns, and each set of sensing series is respectively disposed in one of the display areas Each region is adjacently arranged, each sensing column has an extended end point in the terminal line region; the insulating layer is located above the terminal line region, and the insulating layer has an opening with respect to the plurality of extended end points; The connecting wires are disposed on the insulating layer, and each of the connecting wires electrically connects the extending end points via the openings to electrically connect the plurality of sensing columns.

For the above purposes, the insulating layer can be a photoresist or an insulating ink.

For the above purposes, the jumper wires may be silver paste, nano silver, graphite selenium or carbon nanotubes.

In order to achieve the above object, a method for manufacturing a touch structure of the present invention comprises: providing a flexible transparent substrate having a display area and a terminal line area, wherein the terminal line area is located on one side of the display area, and the display area has The plurality of regions are arranged adjacent to each other to form a transparent conductive layer on the surface of the flexible transparent substrate. Patterning the transparent conductive layer to form a complex array sensing series, each set of sensing series has The plurality of sensing columns are respectively disposed in an area of the display area, and each sensing column has an extended end point located in the terminal line area. An insulating layer is formed in the terminal line region, and the insulating layer covers a plurality of extended end points. The patterned insulating layer forms a plurality of openings at the plurality of extended end points, and forms a plurality of jumper wires connected in series to the insulating layer, and each of the jumper wires electrically connects the extended end points via the openings to electrically sense the plurality of sense lines Sexual connection.

In order to achieve the above object, a method for manufacturing a touch structure of the present invention comprises: providing a flexible transparent substrate with a roll-to-roll, having a display area and a terminal line area, wherein the terminal line area is located at a side of the display area, The display area has a plurality of regions, each of which is adjacently arranged to form a transparent conductive layer on the surface of the flexible transparent substrate. The roll-to-roll patterning transparent conductive layer forms a complex array sensing series, each set of sensing series has a plurality of sensing columns, and each set of sensing series is respectively disposed in one of the display areas, each sense The test column has an extended end point located in the terminal line region. The roll-to-roll forms an insulating layer in the terminal line region, and the insulating layer covers a portion of the plurality of extended end points. The roll-to-roll patterned insulating layer forms a plurality of openings at the plurality of extended end points, and the roll-to-roll forming jumper wires are connected in series to the insulating layer, and each of the jumper wires is electrically connected to the extended end point via the opening The complex sense column is electrically connected.

In order to achieve the above object, the method for fabricating the touch structure of the present invention, wherein the method of forming the insulating layer may be a coating method, a printing method or a lithography method.

To achieve the above object, the method for fabricating the touch structure of the present invention, wherein the method of forming the plurality of jumper wires may be a printing method or a photolithography method.

100,200‧‧‧Flexible transparent substrate

21‧‧‧Transparent conductive layer

110,210‧‧‧Sensor series

111a, 111b, 111c, 211a, 211b, 211c‧‧‧ Sensing columns

112a, 112b, 112c‧‧ ‧ bridge wiring

113a, 113b, 113c, 213a, 213b, 213c‧‧‧ extended endpoints

120a, 120b, 120c, 220a, 220b, 220c‧‧‧ jumper wires

150a, 150b, 150c, 250a, 250b, 250c‧‧‧ openings

160,260‧‧‧Insulation

170,270‧‧‧ transparent protective layer

180,280‧‧‧ display area

181,281‧‧‧Area

190,290‧‧‧Terminal line area

FIG. 1a is a schematic structural view of a touch structure according to an embodiment of the present invention.

Figure 1b is a cross-sectional view of the touch structure of Figure 1a according to a section line AA.

2a to 2e are diagrams showing the structure of a touch structure according to an embodiment of the present invention. Schematic diagram of the method of manufacture.

2f to 2k are cross-sectional views taken along line BB of the touch structure of FIGS. 2a to 2e.

Please refer to FIG. 1a for a schematic structural view of a touch structure according to an embodiment of the present invention, and FIG. 1b is a cross-sectional view of the touch structure of FIG. 1a according to a cross-sectional line AA. First, the touch structure of the present invention comprises: a flexible transparent substrate 100, a complex array sensing series, an insulating layer, and a plurality of jumper wires, wherein the flexible transparent substrate 100 is made of a flexible material, and Curl into a roller shape. The material of the flexible transparent substrate 100 may be, for example, one of PEN, PET, PES, flexible glass, PMMA, PC or PI, or may be a multilayer composite material of the above materials, and the above materials may be formed thereon. The substrate of the multi-layer transparent stack structure, the transparent stack structure of the plurality of layers may be, for example, an anti-reflection layer or the like, but is not limited thereto. The surface of the flexible transparent substrate 100 is provided with a display area 180 and a terminal line area 190. The terminal line area 190 is located on the side of the display area 180. The display area 180 has a plurality of areas 181, and each area 181 is adjacently arranged.

The complex array sensing series 110, wherein the material of the plurality of sensing series 110 can be, for example, a transparent conductive material, such as indium tin oxide, indium oxide, zinc oxide, indium zinc oxide, zinc oxide doped with aluminum, And one or a mixture of antimony-doped tin oxide, the number of sensing series may also be increased or decreased according to requirements, and each set of sensing series 110 is respectively disposed in one of the display areas 181, and each The group sensing series 110 has a plurality of sensing columns 111a, 111b, 111c, and the plurality of sensing columns 111a, 111b, 111c may have a hexagonal shape, a strip shape, a triangle shape, a diamond shape, a snowflake shape, etc., and the specific shape and size may be Selected according to the control IC, and each of the sensing series 110a, 110b, 110c has an extended terminal 113a, 113b, 113c located in the terminal line region 190.

The insulating layer 160 is disposed on the terminal line region 190. The material of the insulating layer 160 may be, for example, a photoresist or an insulating ink, but is not limited thereto. And the insulating layer 160 has an opening 150a, 150b, 150c with respect to the plurality of extended end points 113a, 113b, 113c. The plurality of jumper wires 120a, 120b, and 120c are disposed on the insulating layer 160, and each of the jumper wires 120a, 120b, and 120c is electrically connected to the extended end points 113a, 113b, and 113c via the openings 150a, 150b, and 150c to perform complex sensing. The columns 111a, 111b, and 111c are electrically connected. Further, the transparent transparent substrate 100 further has a transparent protective layer 170, and is covered only by a transparent protective layer 170 in a region (not shown) where the terminal line region 190 and the flexible circuit board are electrically connected. The transparent protective layer 170 may be made of cerium oxide (SiO ₂ ), an organic insulating material, an inorganic insulating material or a photoresist. The photoresist may be, for example, a liquid photoresist or a dry film photoresist, to prevent moisture intrusion of the sensing structure. Or the protection of oxidation is quite excellent.

Please refer to FIGS. 2 a to 2 e for a schematic diagram of a method for fabricating a touch structure according to an embodiment of the present invention, and FIGS. 2f to 2k for a touch structure according to FIGS. 2a to 2 e. Section line BB section view. First, a flexible transparent substrate 200 is provided having a display area 280 and a terminal line area 290. The terminal line area 290 is located on the side of the display area 280. The display area 280 has a plurality of areas 281, and each area 281 is adjacently arranged. A transparent conductive layer 11 is formed on the upper surface of the flexible transparent substrate 200. The transparent conductive layer 11 can be, for example, a metal oxide, a nano silver wire or a nano conductive metal. The metal oxide can be, for example, indium tin oxide. , ITO), indium zinc oxide (IZO), cadmium tin oxide (CTO), aluminum zinc oxide (AZO), indium tin zinc oxide (ITZO), Zinc oxide, cadmium oxide, hafnium oxide (HfO), indium gallium zinc oxide (InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO) Indium gallium magnesium oxide (InGaMgO) or indium gallium aluminum (indium gallium) Aluminum oxide, InGaAlO), etc.). The method of forming the transparent conductive layer 11 can be, for example, sputtering, vapor deposition, vacuum ion plating, electroplating, physical vapor deposition (PVD), chemical vapor deposition (CVD), or the like. Then, the first yellow light process is performed to pattern the transparent conductive layer 11 , wherein the first yellow light process comprises forming a patterned photoresist layer (not shown) on the transparent conductive layer 11 , and the material of the photoresist layer can be It is a liquid photoresist or a dry film photoresist. Then etching the transparent conductive layer 11 and removing the patterned photoresist layer to form a complex array sensing series 210, each set of sensing series 210 having a plurality of sensing columns 211a, 211b, 211c, each set of sensing strings Columns 210a, 210b, 210c are respectively disposed in one of the display regions 281, and each of the sensing series 210a, 210b, 210c has an extended terminal 213a, 213b, 213c located in the terminal line region 290. Forming an insulating layer 260 in the terminal line region 290, the insulating layer 260 covers a portion of the plurality of extending terminals 213a, 213b, 213c, wherein the method of forming the insulating layer may be, for example, a coating method, a printing method or a photolithography method, but Limited to this. Then, the patterned insulating layer 260 includes a second yellow light process, forming a plurality of openings 250a, 250b, and 250c at the plurality of extended end points 213a, 213b, and 213c; and then forming jumper wires 220a, 220b, and 220c to connect the plurality of openings 250a. The method for forming a plurality of jumper wires on the insulating layer 260, for example, may be a printing method or a lithography method, wherein the material of the plurality of jumper wires may be, for example, at least one conductive metal layer or a plurality of conductive metal layers. . The material may be a conductive metal or a conductive alloy such as a copper alloy, an aluminum alloy, gold, silver, aluminum, copper or molybdenum. The structure of the multi-layer conductive metal layer may be, for example, a stacked structure of a molybdenum layer/aluminum layer/molybdenum layer, or may be a conductive metal or a conductive alloy selected from the group consisting of copper alloy, aluminum alloy, gold, silver, aluminum, copper, molybdenum, and the like. Or a plurality of layers of conductive metal layer structures stacked with a plurality of materials, each of the jumper wires 220a, 220b, and 220c being electrically connected to the extending end points 213a, 213b, and 213c via the openings 250a, 250b, and 250c, so that the plurality of sensing columns 210a, 210b, 210c is electrically connected. Then, a transparent protective layer 270 is further formed on the flexible transparent substrate 200, and only the region where the terminal line region 290 and the flexible circuit board are electrically connected (not shown) is not covered by the transparent protective layer 270. cover. The transparent protective layer 270 is quite excellent in protection against moisture intrusion or oxidation of the sensing structure.

In another embodiment (not shown), the method of forming a touch structure provides a flexible flexible substrate roll with a flexible display to a roll-to-roll, having a display area and a terminal line area. The terminal line region is located at one side of the display area, and the display area has a plurality of regions, each of which is adjacently arranged to form a transparent conductive layer on the surface of the flexible transparent substrate web, wherein the method for forming the transparent conductive layer is, for example, a roll pair Roll sputtering, roll-to-roll evaporation, roll-to-roll vacuum ion plating, roll-to-roll plating, roll-to-roll physical vapor deposition (PVD), roll-to-roll chemical vapor deposition (CVD). And performing a roll-to-roll patterned transparent conductive layer, comprising a roll-to-roll first yellow light process to pattern the transparent conductive layer, wherein the roll-to-roll first yellow light process comprises forming a patterned photoresist layer (not shown) Shown on the transparent conductive layer, the material of the photoresist layer can be liquid photoresist or dry film photoresist. Then, the roll-to-roll etching transparent conductive layer is performed, and the patterned photoresist layer is removed to form a complex array sensing series. Each group of sensing series has a plurality of sensing columns, and each group of sensing series is respectively disposed on the display. In one of the zones, each sense train has an extended end point located in the terminal line zone. Then, the roll-to-roll is formed with an insulating layer over the terminal line region, and the insulating layer is overlaid on the plurality of extended end points of the portion, wherein the method of forming the insulating layer can be, for example, coating, printing or lithography. It is not limited to this. Then, the roll-to-roll patterned insulating layer comprises a second yellow light process, and a plurality of openings are formed on the insulating layer corresponding to the plurality of extended end points, and then the roll-to-roll forms a plurality of jumper wires connected in series to the insulating layer Above. The method of forming the plurality of jumper wires may be, for example, a roll-to-roll printing method or a roll-to-roll lithography method, wherein the material of the plurality of jumper wires may be, for example, at least one conductive metal layer or a plurality of conductive metal layers. The material may be a conductive metal or a conductive alloy such as a copper alloy, an aluminum alloy, gold, silver, aluminum, copper or molybdenum. The structure of the multi-layer conductive metal layer may be, for example, a stacked structure of a molybdenum layer/aluminum layer/molybdenum layer, or may be a conductive material selected from the group consisting of copper alloy, aluminum alloy, gold, silver, aluminum, copper, molybdenum, and the like. A multilayer conductive metal layer structure stacked with one or more materials of a metal or a conductive alloy. The plurality of jumper wires are electrically connected by extending the end points via the openings to electrically connect the plurality of sense columns. In this case, the touch signals generated on the plurality of sensing columns are electrically connected by the plurality of jumper wires, and the touch signals are transmitted to the axial terminal lines. Then, a transparent protective layer can be formed on the flexible transparent substrate, and only the region where the terminal line region and the flexible circuit board are electrically connected (not shown) is covered by the transparent protective layer. The transparent protective layer is excellent in protection against moisture intrusion or oxidation of the sensing structure. Fully automated production using the roll-to-roll process, it features features such as streamlined process, increased productivity, reduced manpower and improved product yield.

The invention has the advantages of thinner device, superior touch sensitivity, low manufacturing cost and high production yield. 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.

100‧‧‧Flexible transparent substrate

110‧‧‧Sensor series

111a, 111b, 111‧‧‧ Sensing columns

112a, 112b, 112c‧‧ ‧ bridge wiring

113a, 113b, 113c‧‧‧ extended endpoints

120a, 120b, 120c‧‧‧ jumper wires

160‧‧‧Insulation

170‧‧‧Transparent protective layer

180‧‧‧ display area

181‧‧‧Area

190‧‧‧Terminal line area

Claims (7)

A touch structure includes: a flexible transparent substrate having a display area and a terminal line area, the terminal line area is located on a side of the display area, the display area has a plurality of areas; a complex array sensing series, Each set of sensing series has a plurality of sensing columns, each set of sensing series is respectively disposed in an area of the display area, each area is adjacently arranged, and each sensing column has an extended end located at the terminal a line region; an insulating layer connected only to the terminal line region, and the insulating layer has an opening with respect to the extension ends; and a plurality of jumper wires disposed on the insulating layer, each span The connecting wires are electrically connected to the extending end points via the openings to electrically connect the plurality of sensing columns. The touch structure of claim 1, wherein the insulating layer is a photoresist or an insulating ink. The touch structure of claim 1, wherein the jumper wires are silver paste, nano silver, graphite selenium or carbon nanotubes. A method for manufacturing a touch structure, comprising: providing a flexible transparent substrate having a display area and a terminal line area, the terminal line area being located on a side of the display area, the display area having a plurality of areas, each The regions are adjacently arranged to form a transparent conductive layer on the surface of the flexible transparent substrate; the transparent conductive layer is patterned to form a complex array sensing series, and each set of sensing series has a plurality of sensing columns, each a sensing sequence is respectively disposed in an area of the display area, each sensing column has an extended end point located in the terminal line area; forming an insulating layer only connected to the terminal line area, the insulating layer covering the part Extended end a plurality of openings are formed at the extension ends; and a jumper wire is formed in series to connect the openings to the insulating layer, and each of the jumper wires is electrically connected to the extended end point via the opening to make the plurality Sensing the electrical connection. A manufacturing method of a touch structure, comprising: a roll-to-roll providing a flexible transparent substrate, having a display area and a terminal line area, the terminal line area being located at a side of the display area, the display area having a plurality of areas Each region is adjacently arranged to form a transparent conductive layer on the surface of the flexible transparent substrate; the transparent conductive layer is patterned by roll-to-roll to form a complex array sensing series, and each set of sensing series has a plurality of sensing columns, each of the sensing series being respectively disposed in an area of the display area, each sensing column having an extended end point located in the terminal line area; the roll-to-roll forming an insulating layer only connected to the terminal line a region, the insulating layer covers a portion of the extended end points; the roll-to-roll patterning the insulating layer forms a plurality of openings at the extended ends; and the roll-to-roll forming jumper wires are connected in series to the openings above the insulating layer Each of the jumper wires is electrically connected to the extended end point via the opening to electrically connect the plurality of sensing columns. The method for manufacturing a touch structure according to claim 4 or 5, wherein the method of forming the insulating layer may be a coating method, a printing method or a lithography method. The method for manufacturing a touch structure according to claim 4 or 5, wherein the method of forming the jumper wires may be a printing method or a photolithography method.