TWI470522B - Sensing structure for touch panel and manufacturing method thereof - Google Patents

Description

Touch panel sensing structure and manufacturing method thereof

The present invention relates to a touch panel, and more particularly to a method for manufacturing a touch panel sensing structure, thereby manufacturing a touch panel sensing structure having a reduced touch panel thickness.

The common types of touch panels are resistive, capacitive, ultrasonic, optical, etc. Among them, the most widely used is resistive, followed by capacitive, but after the iPhone was released, due to the use of projected capacitive touch The multi-touch function of the panel enables the capacitive touch panel to gain the attention of the market, and its advantages are waterproof, scratch-resistant, high transmittance and suitable temperature range, although the capacitive touch panel itself is priced. It is more expensive, but as the technology matures, it has gradually entered the market of small-sized touch panels.

In order to make the touch panel more user-friendly and convenient, it has gradually entered a small, smart, light and thin generation. Therefore, many companies have developed methods to reduce the thickness of the touch panel, such as the Republic of China Patent Gazette. No. M368846, the "modified touch panel structure" includes a transparent substrate 10, a color frame 20 is formed on the periphery of the surface of the transparent substrate 10, and a touch sensor 30 is disposed on the transparent substrate 10. The signal wire portion of the touch sensor 30 can be correspondingly disposed under the color frame 20, and the touch sensor utilizes the alignment effect of the bridge structure to reduce the number of layers in the overall process. The touch sensor 30 includes a capacitive sensing layer 12, a resistive layer 13 and a jumper conductive layer 14. The capacitive sensing layer 12 is attached to the transparent substrate 10, and the X-axis and the Y-axis track are equidistantly disposed. The sensing units 121a, 122a are on the same surface, wherein the sensing units 121a of the X-axis tracks are connected to each other, and the sensing units 122a of the Y-axis tracks are not connected, and finally the laying of the barrier layer 13 and the jumper conductive layer 14 will be The sensing units 121a and 122a of the shaft track are electrically connected to each other; however, between the X-axis and Y-axis sensing units 121a and 122a of the patent, a relatively uniform light transmittance is achieved, and each sensing unit 121a is provided. And 122a, the imitation texture of the same material, and the imitation texture must be spaced apart from the edges of the sensing units 121a, 122a by a gap 49a, and must be kept out of contact with each other, and the transparent substrate 10 and a display screen 92 of the touch panel are The adhesive layer is fixed by using an optical adhesive layer 91. No matter how the material of the optical adhesive layer 91 is improved, the presence of the optical adhesive layer 91 necessarily affects the overall light transmittance, and is equivalent to the manufacture of the finished product and the overlapping of the components. Cumbersome Reduction rate, based on the absence of the above techniques which still room for improvement in the conventional.

In view of the above disadvantages, the present invention provides a method for manufacturing a touch panel sensing structure, which uses only a single layer of glass and has the first insulating layer and the touch sensing layer disposed on the same plane, thereby effectively reducing the thickness of the panel and reducing the thickness thereof. The number of layers, which in turn increases yield.

The method for manufacturing the touch panel sensing structure includes the following steps: preparing a transparent substrate having an upper surface and a lower surface; forming a surface on the upper surface of the transparent substrate for the purpose of the above-mentioned purpose a corresponding touch sensing layer; a first insulating layer is disposed on a periphery of the upper surface of the transparent substrate and spaced apart from the touch sensing layer, and the first insulating layer and the touch sensing layer are in the same plane and have The same level of height; A conductive material is disposed between the touch sensing layer and the first insulating layer, and fills the trench; a conductive line is disposed on the first insulating layer, and has a first end and a second end, and The first end is connected to the conductive material; a second insulating layer is formed on the conductive line and the conductive material, and a conductive adhesive is coated on the second end of the conductive line and the second insulating layer, thereby bonding a soft The circuit board is electrically connected to the conductive line exposed at the side through the conductive adhesive.

Therefore, the touch panel sensing structure manufactured by the above steps includes: a transparent substrate having an upper surface and a lower surface; and a touch sensing layer disposed on the upper surface of the transparent substrate; An insulating layer is disposed on a periphery of the upper surface of the transparent substrate, and a trench is spaced apart from the touch sensing layer by the first insulating layer, and the first insulating layer and the touch sensing layer are in the same plane and have the same a conductive material disposed between the touch sensing layer and the first insulating layer and filling the trench; a conductive circuit disposed on the first insulating layer and having a first end and a first a second end, and the first end is electrically connected to the conductive material; a second insulating layer is disposed on the conductive line; a conductive adhesive is disposed on the second end of the conductive line And a function of circuit derivation; a flexible circuit board is fixed by the conductive adhesive, and electrically connected to the conductive line through the conductive adhesive.

By the above, one of the effects achieved by the present invention is that the use of a single piece of glass can reduce the thickness of the panel in the overall process, thereby increasing the light transmittance.

According to the above, the second effect of the present invention is that the first insulating layer and the touch sensing layer are disposed on the same plane, which can reduce the number of layers of the touch panel and simplify the manufacturing steps thereof, thereby reducing the thickness of the panel and improving the thickness. rate.

10‧‧‧Transparent substrate

11‧‧‧ upper surface

12‧‧‧ Lower surface

13‧‧‧ trench

20‧‧‧Touch touch layer

30‧‧‧First insulation

40‧‧‧Electrical materials

50‧‧‧Electrical circuit

51‧‧‧ first end

52‧‧‧ second end

60‧‧‧Second insulation

70‧‧‧ conductive adhesive

80‧‧‧Soft circuit board

90‧‧‧visible area

Fig. 1 is a manufacturing flow chart of the present invention.

2 to 9 are schematic views showing a preferred embodiment of the manufacturing process of the present invention.

Fig. 10 is a plan view showing a finished product of the present invention which is not covered with a second insulating layer.

Fig. 11 is a plan view showing the finished product covering the second insulating layer of the present invention.

For the convenience of the description, the central idea expressed by the present invention in the column of the above summary of the invention is expressed by the specific embodiments. The various items in the embodiments are set forth in proportion to the description and not in the

1 to FIG. 10, FIG. 1 is a manufacturing flow chart of the present invention, and FIGS. 2-9 are schematic views showing a preferred embodiment of the manufacturing process of the present invention. The manufacturing method of the touch panel sensing structure of the present invention comprises the following steps:

A transparent substrate 10 is provided, as shown in FIG. 2, having an upper surface 11 and a lower surface 12. In the present invention, the material of the transparent substrate 10 may be one of soft, rigid, transparent or translucent. The material of the transparent substrate 10 may be one of polycarbonate (PC), polyester (PET), and polymethyl methacrylate (PMMA).

A touch sensing layer 20 is formed, as shown in FIG. 3, formed in a central region of the upper surface 11. In the present invention, the touch sensing layer 20 can be formed by sputtering, wet etching or photo etching. In one case, the material of the touch sensing layer 20 may be Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Al-doped ZnO (AZO) or oxidation. One of the Impurity-Doped Oxides consisting of Antimony Tin Oxide' ATO .

Forming a first insulating layer 30, as shown in FIG. 4, covering the periphery of the upper surface 11. In this embodiment, the first insulating layer 30 is made of an opaque ink, and the touch sensing Layers 20 are in the same plane and have the same level The first insulating layer 30 can be attached to the upper surface 11 of the transparent substrate 10 by printing or coating, and the lower surface is separated by the printing and coating. 12, it can be used to shield the components provided on the upper surface 11.

A conductive material 40 is disposed. As shown in FIG. 5, in the embodiment, the conductive material 40 is an opaque material, one end of which is connected to the touch sensing layer 20, and the other end is connected to the first insulating layer. Above 30, and fills the trench 13.

A conductive line 50 is disposed, as shown in FIG. 6 and FIG. 10, which is screen printed and formed into a fine circuit by using silver glue, and is disposed on the first insulating layer 30, and has a first end 51 and a second The terminal 52 is electrically connected to the conductive material 40 at the first end 51. The second end 52 is used to collect the induced current on the touch sensing layer 20.

A second insulating layer 60 is formed. As shown in FIG. 7 and FIG. 10, FIG. 10 is a top view of the finished product of the present invention not covering the second insulating layer. In this embodiment, the conductive line 50 is covered by screen printing. The second end 52 is exposed on the second end 52, and the opaque insulating material is used to shield the conductive material 40, and the covering area is up to the conductive material 40, the conductive line 50 and the touch sensing layer 20, due to the touch sensing. Both the layer 20 and the transparent substrate 10 are transparent materials. Meanwhile, please refer to FIG. 11. FIG. 11 is a top view of the finished product covering the second insulating layer of the present invention, which is not covered by the second insulating layer 60, and is viewed from the lower surface 12 Can be a visible region 90, the second insulating layer 60 is used to shield the conductive material 40 in the visible region 90. In the present invention, the first insulating layer 30, the conductive material 40 and the second insulating layer 60 are substantially The same color or light transmissive material enables the second insulating layer 60 to function as both protection and shielding to avoid oxidation due to exposure to air.

A flexible circuit board 80 is disposed, as shown in FIG. 7 and FIG. 8, a conductive adhesive 70 is adhered to the second end 52 of the conductive line 50, and is passed through the conductive adhesive 70 and one end of the flexible circuit board 80. Electrical connection.

According to the manufacturing method described above, only the single-layer transparent substrate 10 is used, and the first insulating layer 30 and the touch-sensitive layer 20 are disposed on the same plane and have the same level, so that the cost of the glass and the optical adhesive layer can be saved. In addition to reducing the thickness, the manufacturing steps can be simplified, thereby increasing the light transmittance.

From the above steps, please refer to Figure 9 to Figure 11. The touch panel sensing structure of the present invention includes:

A transparent substrate 10 has an upper surface 11 and a lower surface 12.

A touch sensing layer 20 is disposed on the upper surface 11 of the transparent substrate 10.

A first insulating layer 30 is disposed on the periphery of the upper surface 11 of the transparent substrate 10 and is in the same plane as the touch sensing layer 20, and has the same horizontal height and is spaced apart from the touch sensing layer by a trench 13.

A conductive material 40 is a rectangular structure. The conductive material 40 is disposed between the touch sensing layer 20 and the first insulating layer 30 and fills the trench 13.

A conductive line 50 is disposed between the first insulating layer 30 and the conductive material 40 in a stepped manner, and has a first end 51 and a second end 52. The first end 51 is disposed on the conductive material 40. The second end 52 is disposed on the first insulating layer 30 and electrically connected to the conductive material 40.

A second insulating layer 60 is laid on the conductive line 50 in a screen printing manner and exposes the second end 52. In this embodiment, an opaque insulating material is used for shielding purposes, which covers The area includes the conductive material 40, the conductive line 50 and the touch sensing layer 20, and the area not covered by the second insulating layer 60 can be regarded as a visible area 90 by the lower surface 12. In the present invention, the first An insulating layer 30, a conductive material 40, and a second insulating layer 60 are substantially the same color, and may also be a light transmissive material, so that the second insulating layer 60 can have both protection and shielding functions, thereby avoiding exposure to Oxidation in the air.

A conductive adhesive 70 is disposed on the second end 52 of the conductive line 50 exposed by the second insulating layer 60 and functions as a circuit.

A flexible circuit board 80 is adhered and fixed by the conductive adhesive 70, and electrically connected to the conductive line 50 through the conductive adhesive 70.

With the above structure, the present invention utilizes the first insulating layer and the touch sensing layer on the same plane, which simplifies the manufacturing steps of the panel, thereby reducing the thickness and improving the yield, and more because a single transparent substrate is used. In addition to reducing the cost of a piece of glass, it is not necessary to laminate the transparent substrate and the display screen as in the prior art, and the auxiliary materials required for the process can be reduced, thereby reducing the cost. In addition, the conductive material and the conductive line are used. An electrically connected structure can greatly increase the strength of the passage and avoid damage caused by subsequent production processes.

While the invention has been described in terms of a preferred embodiment, the various embodiments may The above embodiments are merely illustrative of the invention and are not intended to limit the scope of the invention. All modifications or changes made without departing from the spirit of the invention are within the scope of the invention.

10. . . Transparent substrate

11. . . Upper surface

12. . . lower surface

13. . . Trench

20. . . Touch sensing layer

30. . . First insulating layer

40. . . Conductive material

50. . . Conductive line

51. . . First end

52. . . Second end

60. . . Second insulating layer

70. . . Conductive plastic

80. . . Flexible circuit board

Claims (8)

A touch panel sensing structure includes: a transparent substrate having an upper surface and a lower surface; a touch sensing layer disposed on an upper surface of the transparent substrate; and a first insulating layer disposed on the transparent a peripheral surface of the upper surface of the substrate, wherein the first insulating layer and the touch sensing layer are in the same plane and have the same horizontal height, wherein the touch sensing layer and the first insulating layer have a trench; a material disposed between the touch sensing layer and the first insulating layer and filling the trench; a conductive line disposed on the first insulating layer and having a first end and a second end And electrically connecting the first end to the conductive material; a second insulating layer is disposed on the conductive line; a conductive adhesive is disposed on the second end of the conductive line, and is made The function of circuit derivation; a flexible circuit board is fixed by the conductive adhesive and electrically connected to the conductive line through the conductive adhesive. The touch panel sensing structure of claim 1, wherein the first insulating layer, the conductive material and the second insulating layer are made of a light transmissive material. The touch panel sensing structure of claim 1, wherein the first insulating layer, the conductive material and the second insulating layer are substantially the same color. The touch panel sensing structure of claim 3, wherein the second insulating layer covers an area including the conductive material, the conductive line, and the touch sensing layer, which is not covered by the second insulating layer. It is viewed by the lower surface as a see-through visible area. A method of manufacturing a touch panel sensing structure, comprising: Preparing a transparent substrate having an upper surface and a lower surface; forming a corresponding touch sensing layer on the upper surface of the transparent substrate; forming a first insulating layer on the periphery of the upper surface of the transparent substrate, and the first insulating layer The layer is in the same plane as the touch sensing layer and has the same horizontal height, wherein the touch sensing layer and the first insulating layer have a trench between the touch sensing layer and the first insulating layer a conductive material is disposed to fill the trench; a conductive line is disposed on the first insulating layer, and has a first end and a second end, and the first end is connected to the conductive material; A second insulating layer is formed on the circuit and the conductive material; a conductive adhesive is applied to the second end of the conductive line, and a flexible circuit board is adhered thereto, and electrically connected to the conductive line through the conductive adhesive. The method for manufacturing a touch panel sensing structure according to claim 5, wherein the first insulating layer, the conductive material and the second insulating layer are made of a light transmissive material. The method for manufacturing a touch panel sensing structure according to claim 5, wherein the first insulating layer, the conductive material and the second insulating layer are substantially the same color. The method for manufacturing a touch panel sensing structure according to claim 7, wherein the second insulating layer covers the conductive material, the conductive line and the touch sensing layer, and the second insulating layer is not covered by the second insulating layer. The area is viewed from the lower surface as a see-through viewing area.