Touch panel with adhesive layer

Abstract

A touch panel with an adhesive layer, comprising the adhesive layer (9) for sticking, on the entire surface of a display (20), a touch panel body (1) having an upper electrode plate having an upper electrode (3) formed of a transparent conductive film formed on the lower surface of an upper insulation substrate (2) formed of a transparent plastic film and a lower electrode plate having a lower electrode (5) formed of a transparent conductive film formed on the upper surface of a lower insulation substrate (4) formed of a transparent plastic film and opposed to the upper electrode plate through an air layer (6) between the upper electrode plate and the lower electrode plate and a separate support plate member (10) for the adhesive layer, wherein the bending rigidity of the transparent plastic film at a room temperature is 0.3 to 40 kgf.cm<2> when the width (b) of the separate support plate member (10) in cross section is 12 cm.

Description

technical field [0001] The present invention relates to a touch panel with an adhesive layer. The touch panel has no obstacles in the electrical inspection process and the appearance inspection process before delivery, and is free from bending of the product during the period before delivery and before being installed on the surface of a display after delivery. lead to performance degradation. Background technique [0002] For a long time, touch screen has been widely used, it is installed in cordless phones, mobile phones, calculators, notebook computers, PDA (Personal Digital Assistant), digital cameras, video cameras, business communication equipment, etc. An input device that performs various operations by pressing a pen or finger on the front of a monitor of an electronic device or a personal computer based on instructions on a see-through screen. [0003] In the touch screen, there is an upper electrode plate on which an upper electrode 103 made of a transparent condu...

AI Technical Summary

Problems solved by technology

[0005] However, in the case where the above-mentioned membrane / diaphragm structure is adopted for the touch panel, various problems may occur in the entire period from the electrical inspection process before shipment, the visual inspection process to the final mounting on the display surface.

[0006] That is, since the overall thickness of the touch screen of the membrane / diaphragm structure is thin, the entire touch screen is easily warped

In particular, when a hard coat layer is provided on the upper surface of the upper electrode plate, warping is likely to occur due to heating during the manufacturing process, etc.

When performing the visual inspection process with the entire touch panel warped, if the distance between the electrodes is the same, Newton’s rings will not appear and it will be judged as a good product. However, the lower electrode plate of the touch panel is mounted on the display evenly through the adhesive layer When , the distance between electrodes becomes inconsistent and Newton rings appear

On the contrary, if the distance between the electrodes is not uniform in the state where the entire touch panel is warped, it is judged as a defective product because Newton rings do not appear, but when the touch panel is actually mounted on the display, the distance between the electrodes becomes uniform. Newton's rings appear

In this way, due to the existence of problems such as Newton's rings caused by warping, it is difficult to make a correct judgment in the appearance inspection process of the touch screen with the diaphragm / diaphragm structure

[0007] In addition, in the electrical inspection process, as described above, since the total thickness of the lower insulating substrate 104 and the spacer 110 is thin, and the total thickness of the product is also thin, its bending rigidity is small, and the touch panel is easy to bend. When automatic inspection machines of the cassette rack type with glass-structured touch panels are shared, it is difficult to automate inspections

That is, when the touch panel with the adhesive layer at the lowermost stage of the box holder is pushed from the side direction and extruded, in addition, the touch panel with the adhesive layer taken out from the box holder is positioned on the jig and pushed from the side direction Adhesive touch screens can bend or come off the fixture when extruded

[0008] In addition, in other types of automatic or semi-automatic electrical inspection machines, the above-mentioned lower insulating substrate 104 and spacer 110 have a thin total thickness and a touch panel with low bending rigidity is easy to bend. , the lower insulating substrate will protrude and deform locally to the upper insulating substrate side according to the foreign matter

As a result, even if it is a good product, it will be judged as poor insulation due to the contact between the lower electrode plate and the upper electrode plate. The linearity check is performed on the side, and the bad judgment of the input near the input is made

In order to reduce these phenomena, it is considered to arrange the electrical inspection process to be carried out in a clean room, but this requires cost, and even so is not necessarily perfect

[0009] There are also problems: even if it is judged as qualified in the above-mentioned electrical inspection process and visual inspection process, the touch screen with a thin total thickness and low bending rigidity is easy to be bent. Even if it is subjected to any load during the period, it will still cause cracks due to product bending and performance deterioration of transparent conductive films.

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