JPH0778706B2 - Input device and manufacturing method thereof - Google Patents

Description

The present invention relates to an input device and a manufacturing method thereof.

[Conventional technology]

In the conventional device of this type, the two electrodes forming the input device are solid electrodes on the entire surface, and the surface resistance value of the electrodes is considerably low in order to improve the resistance value uniformity of the electrodes. .

[Problems to be solved by the invention]

That is, in order to reduce the power consumption of the conventional input device,
Although it is advantageous to increase the surface resistance value of the electrode, there is a problem that the surface resistance value of the electrode must be reduced in manufacturing the electrode in order to accurately detect the position of the pressing point. there were.

The present invention has been made to solve such a conventional problem, and an object thereof is to be able to detect the position of the pressing point with high accuracy even if the electrode surface resistance value on the substrate is large.

[Means for solving problems]

In the input device of the present invention, electrodes are formed on a substrate surface, and two substrates having electrode terminals at both ends of the electrodes are arranged so that the electrode surfaces face each other and in a direction in which the electrode terminals intersect. In the input device described above, the electrode resistance is adjusted by forming a plurality of regions in which the electrode is not formed inside and the entire circumference is surrounded by the electrode with a constant density on the electrode surface. It is characterized by

In the method for manufacturing an input device according to the present invention, electrodes are formed on the surface of a substrate, and two substrates having electrode terminals at both ends of the electrodes are arranged so that the electrode surfaces face each other, and the electrode terminals intersect. In a method of manufacturing an input device arranged in a direction, a step of forming a solid electrode on the surface of the substrate, and then selectively removing the solid electrode, and a constant density on the electrode surface, the electrode inside Is not formed, and a plurality of regions whose entire periphery is surrounded by the electrodes are formed to adjust the electrode resistance.

[Work]

 The operation of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the basic structure of the present invention.

In FIG. 1, by patterning, an electrodeless portion 4 is formed to reduce the area of the electrode on the electrode surface,
Increase the resistance between the electrode terminals.

〔Example〕

(Example 1) FIG. 2 shows a PET (188μ) film on the upper substrate, glass (1.1 mm thick) on the lower substrate, and vapor-deposited ITO on the electrode (upper substrate 500Ω /
□, lower substrate 200Ω / □), Ag paste was used for the electrode terminals, and grid patterning was applied to the electrode ITO so that the area ratio was 1/2, and a voltage detection type input device was prototyped.
Place a spacer of several tens of μ between the upper and lower substrates.
A seal adhesive was placed in the direction. Substrate size is about 110
X 150 mm, the patterning was done by etching, at -100 micron square pitch, the etched area was 70 micron square. The resistance value is initially in the X direction
What was 280Ω changed to 700Ω, and the Y direction changed from 360Ω to 850Ω. It was about 2.4 to 2.5 times on both sides, not a simple increase in area ratio. This is easy to understand by considering one block of the grid electrode shown in FIG. That is, it is considered that the area A of the electrode 2 shows the resistance value for the area and the area B of the electrode 2 does not show the resistance value for the area. In addition, the accuracy hardly changed, and the transmittance as a two-substrate structure was improved from about 78% at the initial stage to about 80%. Furthermore, in this input device, the input with a finger, a ball-point pen, etc. can be made as smooth as that without patterning, and there is no input dead point.

(Example 2) The grating pitch and the etched portion in Example 1 were
When the same patterning was performed as shown in FIG. 4, the resistance value was about 4 times that of both substrates, and the transmittance was about 3
% Improved.

The input device of the present invention may be a current detection type instead of the voltage detection type. Further, the substrate may be transparent or opaque, and the same applies to the electrodes. In addition to patterning, patterning can also be done with a laser cutter, etc.
The same effect can be realized. Furthermore, the patterning shape may be round, polygonal or any shape having a constant density.

〔The invention's effect〕

As described above, according to the present invention, it is possible to manufacture a substrate in which the resistance value accuracy does not decrease even if the electrode resistance on the substrate is large. Further, it is now possible to change the difficulty of manufacturing, in which the electrode resistance value on the substrate is increased while maintaining the resistance value uniformity, to a method of patterning by etching or the like during the process. Furthermore, in the transparent input device, high transmittance can be achieved at the same time, and it becomes easy to provide a very high-quality input device.

[Brief description of drawings]

FIG. 1 is a basic structural diagram of the present invention, and FIGS. 2, 3 and 4 are diagrams showing an embodiment of the present invention. 1 ... Substrate 2 ... Electrode 3 ... Electrode terminal 4 ... Area without electrodes.

Front page continuation (72) Inventor Minoru Ikegami 3-5 Yamato, Suwa City, Nagano Seiko Epson Co., Ltd. (56) Reference JP-A-56-97137 (JP, A)

Claims (2)

[Claims] 1. An electrode is formed on the surface of a substrate, and two substrates having electrode terminals at both ends of the electrode are arranged so that the electrode surfaces face each other and in a direction in which the electrode terminals intersect. In the input device, the electrode resistance is adjusted by forming a plurality of regions in which the electrode is not formed inside and the entire periphery is surrounded by the electrode at a constant density on the electrode surface. Characteristic input device. 2. An electrode is formed on a surface of a substrate, and two substrates having electrode terminals at both ends of the electrode are arranged so that the electrode surfaces face each other and in a direction in which the electrode terminals intersect. In the method of manufacturing an input device, the step of forming a solid electrode on the surface of the substrate, and then the solid electrode is selectively removed, and the electrode is formed inside the electrode surface with a constant density. And a step of adjusting a resistance of the electrode by forming a plurality of regions all of which are surrounded by the electrode.