KR20130108902A - Touch screen panel with one body type flexible printed circuit board - Google Patents

Abstract

PURPOSE: A touch screen panel with a flexible printed circuit board (FPCB) is provided to have a simple manufacturing process by omitting an FPCB bonding process and a forming process of an electrode for connecting an indium tin oxide (ITO) sensor part and the FPCB. CONSTITUTION: One end of a conductive sensor part (A) is extended to form an extension part (B). A conductive pattern (b2) of an FPCB is formed in the extension part. The conductive sensor part comprises a sensor section in which a pattern is formed by depositing conductive compounds on one surface of a tempered glass or film. The conductive sensor part is formed on a window board layer (10) or a conductive film layer (20). An optically clear adhesive (OCA) layer attaches the window board layer or the conductive film layer.

Description

TOUCH SCREEN PANEL WITH ONE BODY TYPE FLEXIBLE PRINTED CIRCUIT BOARD}

The present invention relates to a touch screen panel in which a flexible printed circuit board is integrally formed, and specifically, one end of a window substrate layer or a conductive film layer in which a conductive sensor region of the touch screen panel is formed, and is flexible to the extended portion. The present invention relates to a touch screen panel in which a conductive pattern of a printed circuit board is formed, and the window substrate layer or the conductive film layer and the flexible printed circuit board are integrally formed.

Touch Screen Panel, an industry that is rapidly growing recently, is a new input method that can replace the input method such as a mouse or keyboard, and the user directly touches the desired information on the screen by using his / her fingers while looking at the screen. It is a new input method that can be input. Therefore, it is evaluated as the most ideal input method under the GUI (Graphical User Interface) environment because it can be easily operated by anyone, and is currently used as a mobile phone, navigation, PMP, bank teller and dispenser, public information issuing machine, guide of various tourism and major institutions. It is widely used in various fields such as appliances.

Resistive and capacitive methods have been mainly applied to the touch screen panel as described above. However, the touch screen panel has a higher transmittance than Apple's resistive method and has a multi-touch function that recognizes two or more locations at the same time. Since adopting the touch screen panel of the electrostatic method to the iPhone, it has been expanding rapidly to the smartphone, tablet PC, etc., and is growing rapidly in terms of scale, and as a related prior art, Korean Patent Publication No. 10-0681157, Korean Patent Publication No. 10-2012-0006176, Patent Literature 2, Korean Patent Application Publication No. 10-2011-0040543, Patent Literature 3, Korean Patent Application Publication No. 10-2010-0073546 and Patent Literature Korean Patent Publication No. 10-2008-0110158 has five persons.

Meanwhile, the conventional touch screen panel has a structure in which a flexible window printed circuit board 30 is inserted and compressed between the window substrate layer 10, the conductive film layer 20, and the conductive film layers, as shown in FIG. 1. have. In the conventional touch screen panel, the flexible printed circuit board 30 is inserted between the upper conductive film layer 20a and the lower conductive film layer 20b as shown in FIG. 2. After connecting to the conductive pattern electrode formed on the conductive film layer is typically subjected to a bonding process by applying a pressure for 10 seconds or more using a high temperature of 150 ℃ and a strong pressure of 2MPa.

Here, the flexible printed circuit board 30 is a flexible printed circuit board, which is usually laminated on a copper foil laminated plate as a conductor on top of an insulator film, printed a circuit, and then the copper foil laminated plate to correspond to the printed circuit pattern. By etching, removing the resist, applying an insulating ink, printing the names, symbols, etc. of each part on the upper surface thereof, and then manufacturing holes and shapes. As shown in FIG. 3, the conductive pattern b2 is formed on the surface contacting the base film b1, and various patterns can be designed according to the applied product.

On the other hand, the touch screen panel has a laminated structure of the window substrate layer 10 and the conductive film layer 20 and ITO (Indium Tin Oxide) on one surface of the window substrate layer 10 and the conductive film layer 20 According to the structure in which the conductive pattern layer (I) is formed, it is classified into a GFF type, a G1F type, a GG type, or a G2 type as shown in Table 1 below.

division rescue Reference GFF
type Window substrate layer 10-Upper conductive film layer 20a-OCA layer 40-Lower conductive film layer 20b Figure 4a
Reference G1F
type Window Substrate Layer 10-OCA Layer 40-Conductive Film Layer 20 Figure 4b
Reference G2
type Window substrate layer 10-OCA layer 40-x, y-axis sensor layers Ia, Ib Figure 4c
Reference In the above, the window substrate layer 10 is a tempered glass material

Referring to the structure of the touch screen panel described in [Table 1] in detail, as shown in Figure 4a, the GFF type, the upper conductive film layer 20a, the lower portion of the window substrate layer 10 of the tempered glass material, The lower conductive film layer 20b in which the sensor layer is formed by depositing the conductive pattern layer I such as the OCA layer 40 and ITO is formed, and a total of two film layers are stacked.

In addition, in the G1F type, as shown in FIG. 4B, a conductive film in which a sensor layer is formed by depositing a conductive pattern layer I such as an OCA layer 40 and ITO under the window substrate layer 10 of tempered glass material The layer 20 is configured so that a total of one film layer is laminated.

In addition, in the G2 type, as shown in FIG. 4C, an OCA layer 40 is formed below the window substrate layer 10 of tempered glass material, and a conductive pattern layer such as ITO is formed on the rear surface thereof in the x-axis direction. The conductive film layer 20 formed with the y-axis sensor layer Ib formed by forming the x-axis sensor layer Ia and the conductive pattern layer such as ITO in the y-axis direction, and then the insulating layer 50 is laminated. The type is a type that uses a total of one sheet of tempered glass.

Here, a transparent PET film or the like may be used for the window substrate layer 10 instead of tempered glass, and in addition to the flexible printed circuit board 30 between the window substrate layer 10 and the conductive film layer 20 in the structure. The electrode, the adhesive layer, the dot, the decorative layer, etc. may be formed, but this is a well-known technique, and a detailed description thereof will be omitted since it can be variously modified according to its type, structure, and use environment.

In addition to indium tin oxide (ITO) used in the present invention, indium zinc oxide (IZO), indium tin zinc oxide (IZTO), PEDOT [poly (3,4-ethylenedioxythiophene)], CTO (Cadmiun Tin Oxide), Carbon nanotube (CNT), zinc oxide (ZnO), silver nano wire (silver nano wire) and the like can be applied.

On the other hand, the conventional touch screen panel as described above, as shown in Figure 4, to form an electrode 60 for receiving the electrical signal of the conductive sensor unit, the flexible printed circuit board 30 on the electrode 60 As a result of the bonding process, the manufacturing process becomes complicated, and manufacturing costs increase due to a decrease in process yield due to poor connection.

Patent Document 1: Korean Patent Publication No. 10-0681157 (Structure of capacitive touch panel and its manufacturing method) Patent Document 2: Korean Laid-Open Patent Publication No. 10-2012-0006176 (Capacitance Touch Sensor and Capacitive Touch Panel Integrated with Window Panel Including It) Patent Document 3: Korean Laid-Open Patent Publication No. 10-2011-0040543 (Method of manufacturing a capacitive touch panel pad and a capacitive touch panel manufactured thereby) Patent Document 4: Korean Laid-Open Patent Publication No. 10-2010-0073546 (Capacitive touch panel and capacitive touch system including the same) Patent Document 5: Korean Laid-Open Patent Publication No. 10-2008-0110158 (capacitive touch panel and keypad integrated communication terminal device including the same)

The present invention provides a method for solving the above problems by forming a window substrate layer or a conductive film layer and a flexible printed circuit board integrally formed with a conductive sensor unit, and separately bonding the flexible printed circuit board and the ITO sensor unit; As the formation process of the electrodes for connecting the flexible printed circuit boards is omitted, the manufacturing process is simplified, the defect rate is reduced, and the manufacturing cost can be reduced. The task is to provide.

The present invention provides a touch screen panel including a window substrate layer or a conductive film layer on which a conductive sensor unit is formed, an OCA layer for adhering the window substrate layer or the conductive film layer, or an insulating layer for preventing the conduction of the conductive sensor unit. In one embodiment, the conductive sensor unit extends one end to form an extension part, and the touch screen panel in which the flexible printed circuit board is integrally formed is formed on the extension part. .

The conductive sensor unit is a touch screen panel in which the flexible printed circuit board is integrally formed, wherein the sensor region is formed by depositing a conductive compound on one surface of the tempered glass or film to form a pattern. The material is PET (polyethyleneterephthalate), PEI (polyetherimide), PAR (polyacrylate), PES (polyethersulphone), PEN (polyethyelenen napthalate), PPS (polyphenylene sulfide), PA (polyallylate), PI (polyimide), PC (polycarbonate), TAC (cellulose triacetate), CAP (cellulose acetate propionate) is selected from one type, and the conductive compound is ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), IZTO (Indium Tin Zinc Oxide), PEDOT (poly 3,4-ethylenedioxythiophene), CTO (Cadmiun Tin Oxide), CNT (Carbon Nanotube), zinc oxide (ZnO) or silver nano wire (1 or more) is preferably used in combination .

The present invention extends one end of the conductive sensor portion formed on the window substrate layer or the conductive film layer, and forms a conductor pattern of the flexible printed circuit board in the extended portion, thereby forming the window substrate layer or the conductive film layer and the flexible printed circuit board. The integrated structure simplifies the manufacturing process by omitting the process of separately bonding the flexible printed circuit board and the process of forming electrodes for connecting the ITO sensor unit and the flexible printed circuit board, respectively, and reducing the defective rate due to the reduction of the process. In addition, the manufacturing cost can be reduced.

1 is a view showing the structure of a general touch screen panel.
FIG. 2 is a view illustrating the structure of the general touch screen panel of FIG. 1 separately. FIG.
3 is a view showing the structure of a typical flexible printed circuit board.
FIG. 4 is a diagram illustrating the structure of a window substrate layer and a conductive film layer for each type with respect to the general touch screen panel of FIG. 1. FIG.
FIG. 5 is a view illustrating an area of a conductive sensor unit in which a conductive sensor pattern is formed on a window substrate layer and a conductive film layer of a general touch screen panel.
6 is a view showing the structure of the window substrate layer and the conductive film layer of each type of the touch screen panel according to an embodiment of the present invention.
7 is a view illustrating a state in which a conductive sensor unit and a flexible printed circuit board are connected in the touch screen panel of FIG. 6.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the detailed description, reference to configurations and operations easily understood by those skilled in the art will be briefly or omitted.

FIG. 5 is a view illustrating an area of a conductive sensor unit in which a conductive sensor pattern is formed on a window substrate layer and a conductive film layer of a general touch screen panel, and FIG. 6 is a window substrate layer and conductive layer of a touch screen panel according to an embodiment of the present invention. 7 is a view illustrating a structure of a film layer for each type, and FIG. 7 is a view illustrating a state in which a conductive sensor unit and a flexible printed circuit board are connected in the touch screen panel of FIG. 6, and the present invention is a conductive sensor in FIGS. 6 and 7. OCA layer 40 or the conductive sensor unit for adhering the window substrate layer 10 or the conductive film layer 20 and the window substrate layer 10 or the conductive film layer 20 in which the portion A is formed In the touch screen panel including an insulating layer (50) for preventing the energization of (A), the conductive sensor portion (A) extends one end to form an extension portion (B), the extension portion (B) On flexible printed circuit boards The conductive pattern b2 (see FIG. 3) of the (FPCB, flexible printed circuit board) 30 is integrally formed.

As illustrated in FIG. 3, the conductor pattern b2 is a pattern in which electrical components such as integrated circuits, resistors, or switches are fixed to the upper surface of the base film b1 of the general flexible printed circuit board 30 with a conductive material. It means the design of various patterns according to the applied products.

That is, according to the present invention, unlike the prior art in which the conductor pattern b2 is formed on the base film b1 and then separately bonded, as illustrated in FIGS. 6A to 6D and 7A and 7B, the conductive sensor unit ( The conductor pattern b2 is formed on the extension portion B itself, which extends from one end of A).

In the present invention, as shown in FIG. 5, the conductive sensor part A is formed by depositing a conductive pattern layer I such as ITO on one surface of the window substrate layer 10 or the film layer 20. It means the member in which the formed sensor area S is located.

In addition, as shown in FIG. 7A, the extension part B may include a conductive sensor part of the window substrate layer 10 or the conductive film layer 20 according to the type, structure, use environment, and function of the touch screen panel. It may extend in a region of A), or as shown in FIG. 7B, may extend to the same width as the film of the tempered glass of the window substrate layer 10 or the film of the conductive film layer 20.

In addition, the conductor pattern b2 and the contact thereof are also manufactured to correspond to the width of the extension portion B as described above.

Accordingly, the present invention extends the extension portion B to one end of the conductive sensor portion A, thereby transmitting an electrical signal from the sensor formed in the sensor region S to the conductor pattern b2 formed in the extension portion B itself. It is characterized by a simple structure that is directly received.

On the other hand, the configuration of the window substrate layer 10 and the conductive film layer 23 can be divided into GFF type, G1F type, GG type or G2 type, as described above, each type according to the present invention An example is as follows.

First, Figure 6a shows a GFF type according to the present invention, the conductive pattern layer (I) such as the upper conductive film layer 20a, OCA layer 40 and ITO under the window substrate layer 10 of the tempered glass material The lower conductive film layer 20b having the sensor layer formed thereon by depositing the deposited layer is stacked, and the conductive sensor unit A is " upper conductive film layer 20a-OCA layer 40-lower conductive film layer 20b. ", The extension portion (B) is integrally formed at one end of the conductive sensor portion (A), and a conductor pattern (b2) (see Fig. 3) is formed on the extension portion (B).

Figure 6b is a G1F type according to the present invention, a conductive film formed by forming a sensor layer by depositing a conductive pattern layer (I) such as OCA layer 40 and ITO under the window substrate layer 10 of the tempered glass material A layer 20 is constructed so that a total of one film layer is laminated, and the conductive sensor unit A is "a window substrate layer 10-OCA layer 40-a conductive film layer 20 of tempered glass material". Although the structure has a structure, an extension part B is integrally formed at one end of the conductive sensor part A, and a conductor pattern b2 (see FIG. 3) is formed on the extension part B.

6A and 6B, an optically clear adhesive layer, an OCA layer (Optically Clear Adhesive Layer) 40, is laminated between the upper conductive film layer 20a and the lower conductive film layer 20b as shown in FIG. 6A. The conductive film layers may be bonded to each other or laminated between the window substrate layer 10 of the tempered glass material-the conductive film layer 20 as shown in FIG. 6B and the window substrate layer 10 of the tempered glass material. The conductive film layer 20 serves to adhere to each other.

FIG. 6C illustrates a G2 type according to the present invention, in which an OCA layer 40 is formed under the window substrate layer 10 of tempered glass material, and a conductive pattern layer such as ITO is formed on the rear surface thereof in the x-axis direction. The conductive film layer 20 formed with the y-axis sensor layer Ib formed by forming the x-axis sensor layer Ia and the conductive pattern layer such as ITO in the y-axis direction, and then the insulating layer 50 is laminated. Type, and a total of one sheet of tempered glass is used, and the conductive sensor portion A is formed of "window substrate layer 10-OCA layer 40-x, y-axis sensor layers Ia and Ib" of tempered glass material. Although having a structure, the extension part B is integrally formed at one end of the conductive sensor part A, and a conductor pattern b2 (see FIG. 3) is formed on the extension part B.

The insulating layer 50 is a screen printing, gravure by selecting one type of epoxy resin, polyurethane resin, silicone resin, insulating ink that is a compound having an insulating property so that the conductive sensor (A) is not energized between the sensors The insulating layer is formed by a conventional printing method such as printing, and printing by various methods is possible in addition to the printing method defined above.

In the present invention, the extension portion (B) may be formed on any one or both sides of the window substrate layer 10 and the conductive film layer 20 in consideration of the function, use environment, etc. of the product.

In addition, the window substrate layer 10 may use a transparent film instead of tempered glass, and an adhesive layer, a dot, a decoration layer, etc. may be formed between the window substrate layer 10 and the conductive film layer 20. Since it is a well-known technique and a range which can be variously modified according to the type, structure, and use environment, the detailed description is abbreviate | omitted.

And in the present invention, the material is PET (polyethyleneterephthalate), PEI (polyetherimide), PAR (polyacrylate), PES (polyethersulphone), PEN (polyethyelenen napthalate), PPS (polyphenylene sulfide), PA (polyallylate), PI (polyimide) ), PC (polycarbonate), TAC (cellulose triacetate), CAP (cellulose acetate propionate) can be selected one.

In addition, although the conductive compound used in the present invention has been described as indium tin oxide (ITO) as an embodiment, indium zinc oxide (IZO), indium tin zinc oxide (IZTO), and PEDOT (poly (3,4) in addition to ITO -ethylenedioxythiophene)), CTO (Cadmiun Tin Oxide), CNT (Carbon Nanotube), zinc oxide (ZnO), silver nano wire (silver nano wire) can be applied.

Accordingly, the present invention extends one end of the tempered glass or conductive film layer 20 constituting the window substrate layer 10 as the conductive sensor unit A, and the conductor of the flexible printed circuit board 30 to the extended portion. By forming the pattern (b2) and integrally forming the tempered glass or film and the flexible printed circuit board 30, the process is simplified as the process of separately bonding the flexible printed circuit board 30 is excluded, and the defect rate Not only is this reduction reduced, there is no need to provide a flexible printed circuit board 30 separately, which reduces the material cost.

As described above, the touch screen panel formed integrally with the flexible printed circuit board according to the present invention has been described as described above, but this is merely described, for example, and various changes and modifications may be made without departing from the technical spirit of the present invention. Those skilled in the art will appreciate that changes are possible.

10: window substrate layer 20: conductive film layer
20a: upper conductive film layer 20b: lower conductive film layer
30: flexible printed circuit board 40: OCA layer
50: insulating layer 60: electrode
A: conductive sensor portion B: extension portion
b1: base film b2: conductor pattern
S: Sensor area I: Conductive pattern layer
Ia: x-axis sensor layer Ib: y-axis sensor layer

Claims (4)

A touch screen panel including a window substrate layer or a conductive film layer on which a conductive sensor unit is formed, an OCA layer for adhering the window substrate layer or a conductive film layer, or an insulating layer for preventing the conduction of the conductive sensor unit.
The conductive sensor unit extends one end to form an extension,
And a flexible printed circuit board in which the flexible printed circuit board is formed integrally with the extension part.
The method of claim 1,
The conductive sensor unit is a touch screen panel in which the flexible printed circuit board is formed integrally, characterized in that the sensor region formed by depositing a conductive compound on one surface of the tempered glass or film to form a pattern.
The method of claim 2,
The film, the material
PET (polyethyleneterephthalate), PEI (polyetherimide), PAR (polyacrylate), PES (polyethersulphone), PEN (polyethyelenen napthalate), PPS (polyphenylene sulfide), PA (polyallylate), PI (polyimide), PC (polycarbonate), TAC (cellulose) A touch screen panel in which a flexible printed circuit board is integrally formed, wherein one type is selected from triacetate and CAP (cellulose acetate propionate).
The method of claim 2,
The conductive compound,
ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), IZTO (Indium Tin Zinc Oxide), PEDOT (poly (3,4-ethylenedioxythiophene)), CTO (Cadmiun Tin Oxide), CNT (Carbon Nanotube), Zinc Oxide ( ZnO) or silver nano wire (1) or a touch screen panel in which a flexible printed circuit board is integrally formed.

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