JPS5940425A - Method of producing spacer in touch type input device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to display devices such as CRTs for computer terminals.
The present invention relates to input devices that may be used, and particularly relates to a method for detecting a suppression position when a panel surface is pressed with a suppression pen or the like, and for creating a spacer in a touch type input device.

Conventionally, various types of input devices of this type have been proposed. One of them is the device shown in FIG.

That is, FIG. 1 shows a cross section of an input device, in which indium oxide (InO8) is placed on a transparent base substrate 1 made of acrylic resin, and on a polyester base film 2a.
One electrode 2 is laminated with a transparent resistance layer 2b made of tin oxide (8nO,), and a columnar insulating spacer 3 made of silicon 414N is provided protrudingly on top of this electrode 2. On top is another electrode 4 laminated on a base film 4a, which is a resistance layer 4b, similar to the electrode 2, and is superimposed so that the resistance M4b faces the resistance layer 2b of the first electrode 2. It is coated with a transparent protective sheet 5 made of polyester film. As shown in FIGS. 2(a) and (b)K, one electrode 2
A terminal electrode 2C made of silver or the like is formed on both ends of the terminal electrode 4, and the terminal electrode 2C is formed on the other electrode 4.
Terminal electrodes 4C are formed at both ends perpendicular to C, and no voltage is alternately applied between the terminal electrodes 2C and between the terminal electrodes 40.

Therefore, as shown in FIG. 3, when the top of the protective sheet 5 is pressed with the tapered suppressing ben 6, the resistor layer 2b and the resistor M4b come into contact, and the voltage is alternately detected in the resistor layer to which no voltage is applied. Therefore, suppressed signals can be detected.

The formation of the spacer in such an input device is as follows.

First, a photoresist layer is coated on the electrode 2 on which the resistive layer 2b has been formed, and a mask coated with a desired pattern is applied and exposed. Next, the unnecessary photoresist Mk is removed using a mask and etched, and the remaining spacer 3 is formed from the first resist layer.

[2 However, depending on the above manufacturing method, it is difficult to completely remove the edges of the photoresist layer once coated on the electrode 2 even if there is a defect in the coated layer, and it is difficult to completely remove the edges, including the two electrodes. This resulted in a non-defective product, causing an increase in costs.

The present invention has been made in view of the above points, and an object of the present invention is to provide a method for manufacturing a spacer in which even if the spacer is defective, the electrode can be used again and the yield is improved.
To do this, a photosensitive film was crimped onto the electrodes, a negative film with a patterned pattern was layered on top of the photosensitive film, and the film was exposed to light.

After developing and removing the unexposed parts of the photosensitive film,
The manufacturing process is characterized by heating and drying and forming a spacer of a desired shape using a photosensitive film on the electrode surface.

Embodiments of the present invention will be described below based on the drawings.

FIG. 4 is a diagram showing the manufacturing process of an embodiment of the present invention. First, a transparent resistance layer 2b made of indium oxide and tin oxide is laminated on a base film 2a made of transparent polyester, and a sheet-like electrodeposition 2 Prepare. Of course, terminal electrodes 2C for voltage application are formed at both ends of this resistance layer 2b.

A sheet-like photosensitive film 8 is laminated on the resistive layer 2b of the electrode 2 by pressing with a roller 7 as shown in FIG. There are T-1015 (manufactured by Liston Co., Ltd.) and 605F (Hitachi, Ltd.), which are sheet-like sheets with adhesive strength that will stick to the substrate by pressing lightly, and can be used inadvertently. has adhesive strength to the extent that it does not peel off, and can be relatively easily separated from the substrate using fingers or a jig tube Y.

Next, as shown in FIG. 4 (1), a pattern-printed negative film 9 is placed on top of the photosensitive film 8 for masking, and then exposed. After heat treatment of this first material, εI】
Then, as shown in FIG. 4(C), the film is developed with a developer 10, the unexposed areas are washed, and projections 8a and electrodes 2 are formed on the electrode 2 by the photosensitive film 8, as shown in FIG. 4(d) (4). After heating and drying, the protrusion 8a is completed as the spacer 3.

In addition, there are many shapes of the spacer 3 mentioned above! Can be formed into 11 shuttles.

The most common type is a columnar dot spacer as shown in Figure 15), but if necessary, it can be a lattice-shaped spacer with mutually connected parts as shown in Figure 6, or a lattice spacer as shown in Figure 7. As shown in the figure, it is possible to form a honeycomb-shaped spacer or the like in which regular hexagons are arranged in a row.

To assemble the input device, the electrode 2 with the space 3 manufactured as described above is placed on the spacer substrate 1, and an electrode 4 similar to the electrode 2 is placed on the spacer 3 so that its resistance layer 4b is connected to the spacer 3.
All you have to do is place it on top and cover it with the protective sheet 5.

In the above embodiment, the spacer 3 was integrally molded only on the lower electrode 2, but contrary to the stiffness, it is integrally formed with the upper electrode 4 that faces the electrode 2, and the temperature is good. Both 2 and 4 different positions MK' may be formed.

The present invention is as described above, and in particular, in the spacer manufacturing process, a photosensitive film is pressure-bonded onto an electrode, a pattern is formed on the photosensitive film, and a negative film is layered, the stiffness is exposed, developed, and exposed to light. After removing the unexposed portion of the photosensitive film, the photosensitive film was dried by heating to form spacers 2 in a desired pattern on the electrode surface using the photosensitive film.

Therefore, what is laminated as a spacer material on the electrode is a film-like photosensitive sheet, and even if a defect occurs in the spacer material during the layering process, it can be easily peeled off from the electrode and the electrode can be used again. This will improve yields and reduce costs. Also, the spacer material is in sheet form, so can it be simply crimped? [Since it is stacked on top of the other layers, work efficiency can also be improved.

[Brief explanation of the drawing]

Figure 1 is a partial cross-sectional view of the touch type input device, Figure 2 shows the power & of the touch type input device, (a) is the lower electrode, (1)
) is the upper electrode. Is Figure 3 the operating state of the touch-type human power edict? FIG. 4 is a diagram showing the manufacturing process of the spacer of the present invention, in which (a) is a photosensitive film lamination process, (b) is an exposure process, (C) is a development process, and (d) is a partial cross-sectional view. indicates the state after cleaning. FIG. 5 is a perspective view showing an example of the spacer shape, FIG. 6 is a perspective view showing another example of the spacer shape, and FIG. 7 is a perspective view showing another example of the spacer shape. 2... Electrode, 3... Spacer, 4...
...Electrode, 8...Photosensitive film, 9...
...Negative film. Figure 1 Figure 2 (a) ? Figure 2 (b) Figure 4 2145 Figure 6 Figure 7

Claims (1)

[Claims] The 51CL detects the input position by placing two electrodes facing each other with a spacer in between and bringing both electrodes into contact.In a touch-type input device, a photosensitive film is crimped onto one electrode, and a photosensitive film is placed on the photosensitive film. After pattern formation, negative films were layered, the stiffness was exposed and developed, and the unexposed parts of the photosensitive film were removed, followed by heating and drying to form spacers with a desired pattern on one electrode surface using the photosensitive film. A method for manufacturing a spacer for a touch input device, characterized in that: