JP2010149428A - Metal tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal tape capable of minimizing curl when peeling a metal tape body. <P>SOLUTION: The metal tape 10 is constituted by peelably affixing the metal tape body 4 having an adhesive layer 12 onto a mount 11 subjected to the peeling processing. The affixing face 11a of the mount to the metal tape body 4 is subjected to emboss processing. The metal tape body 4 is used for the noise countermeasure of a liquid crystal module 1, for example. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a metal tape used, for example, for measures against noise in a liquid crystal module, and more particularly to a technique for eliminating curling of a metal tape body.

  Since a liquid crystal display device is a flat display device having excellent characteristics such as thinness, light weight, and low power consumption, it is a mobile device such as a so-called PDA or a mobile phone, a display unit of a personal computer, and a liquid crystal television. It is used for a wide range of applications.

  The liquid crystal display device includes a liquid crystal display panel having a structure in which a liquid crystal layer is sandwiched between a pair of display panel substrates, that is, an array substrate and a counter substrate, and is selected for each pixel between the array substrate and the counter substrate. In addition, the liquid crystal layer is controlled by applying a voltage to display an image. Here, for example, in an active matrix liquid crystal display panel, thin film transistors (TFTs) are formed as switching elements using amorphous silicon or polysilicon semiconductor on an array substrate, and pixel electrodes and scanning lines connected to the switching elements. , Signal lines and the like are formed. On the other hand, a counter electrode made of indium tin oxide (ITO) or the like, a color filter, or the like is formed on the counter substrate.

  In the liquid crystal display device having the above-described configuration, a drive circuit is formed around the liquid crystal display panel, and further, a flexible wiring board or the like is connected to form a module. In this liquid crystal module, noise countermeasures are essential. It has become. When electromagnetic waves or the like enter the drive circuit or the flexible wiring board, the electromagnetic wave failure leads to malfunction of the circuit, and the reliability of the liquid crystal module is greatly impaired.

Under such circumstances, proposals regarding the shield structure have been made in various directions as countermeasures against noise in liquid crystal modules (see, for example, Patent Document 1). In Patent Document 1, in a liquid crystal display panel in which an IC chip is mounted on a terminal formed in a terminal forming portion of a substrate, an IC chip is placed on at least one of the front and back surfaces of the IC chip mounting portion on the substrate. A liquid crystal display panel on which an electromagnetic shielding tape for protecting from the above is pasted is disclosed. The electromagnetic shielding tape has a configuration in which a conductor made of a metal film such as copper foil is formed on the lower layer side of an insulating cover film, and an adhesive layer is formed on the lower layer side of the conductor. The effect on electromagnetic interference can be obtained simply by attaching.
JP 2004-29448 A

  By the way, although the electromagnetic shielding tape described in the above-mentioned patent document 1 is composed of a cover film, a metal film, and an adhesive layer, most simply, a shielding effect can be obtained simply by attaching a metal foil having an adhesive. Can be obtained. In this case, the metal tape main body having the adhesive layer may be peeled and bonded to the release mount, and the metal tape main body having the adhesive layer may be peeled off from the mount and attached to the liquid crystal module. .

  However, a metal tape body made of a metal foil or the like tends to curl when peeled off from the mount, which causes a reduction in work efficiency such as a very difficult pasting operation. Further, if the metal tape body is curled, wrinkles, streaks and the like are formed on the surface, resulting in a great loss of aesthetics. Once wrinkles and streaks on the surface of the metal tape body are formed, it is difficult to erase them.

  The present invention has been proposed in view of such a conventional situation, curling that occurs when the metal tape body is peeled off can be minimized, the pasting operation is easy, and the aesthetic appearance is impaired. An object is to provide a metal tape that does not occur.

  In order to achieve the above-described object, the metal tape of the present invention is a metal tape in which a metal tape body having an adhesive layer is releasably bonded onto a release-treated mount, and the metal of the mount The bonding surface of the tape main body is embossed.

  By embossing the mount, the area of adhesion with the adhesive layer of the metal tape body is reduced. As a result, less tension is required for peeling, and the metal tape body is less likely to curl. Further, since the adhesive layer is the same as the conventional one, the adhesive force does not decrease.

  In the metal tape of the present invention, the tension required when the metal tape main body is peeled off is greatly reduced, so that the force applied to the metal tape main body can be reduced and curling can be suppressed. Therefore, the pasting operation is easy, and the working efficiency can be improved. Further, since curling is suppressed as described above, wrinkles, streaks and the like are not formed on the metal tape body, and the aesthetic appearance is not impaired.

  Hereinafter, specific embodiments of a metal tape to which the present invention is applied will be described in detail with reference to the drawings.

  First, the metal tape of the present invention is used, for example, as a countermeasure against noise in a liquid crystal module, and is used by being attached to the back surface of the liquid crystal module 1 as shown in FIGS. 1 (a) and 1 (b). Is. The liquid crystal module 1 has a liquid crystal display panel 2 in which peripheral circuits such as a drive circuit and a power supply circuit are formed in an outer peripheral portion (so-called frame region), for example, and the peripheral circuit of the liquid crystal display panel 2 for connecting the external circuit to an external circuit. The flexible wiring board 3 is connected to the liquid crystal display panel 2 on the display surface side and folded back to the back side along the display panel, for example. A metal tape body 4 having an adhesive layer is attached so as to cover the surface, and is configured to prevent generation of noise due to intrusion of electromagnetic waves or the like. 1A shows a state before the metal tape main body 4 is attached, as viewed from the back surface side which is the non-display surface side of the liquid crystal module 1, and FIG. 1B shows the metal tape main body. 4 shows a state after 4 is attached. The connector portion of the flexible wiring board 3 is a free end so as to be flexible without being covered by the metal tape body 4.

  The affixing of the metal tape body 4 is effective not only for noise suppression but also for preventing the flexible wiring board 3 from being lifted, for example. If there is no fixing means, the flexible wiring board 3 is attached in a state of being lifted from the back surface of the liquid crystal display panel 2, and becomes an obstacle in assembling the liquid crystal module 1, for example. If the flexible wiring board 3 is fixed by affixing the metal tape main body 4 to eliminate the lifting, workability and the like can be greatly improved.

  The metal tape main body 4 to be attached to the liquid crystal module 1 is supplied as a metal tape in a state of being attached on the mount, and is used by being peeled off from the mount. FIG. 2 shows a schematic configuration of the metal tape 10. The metal tape 10 is formed by laminating a metal tape main body 4 having an adhesive layer 12 formed on a mount 11 whose surface has been released.

  The metal tape body 4 is formed of any metal or alloy, and a sheet-like metal or alloy such as a metal foil is used. As a metal which comprises the metal tape main body 4, copper (Cu), aluminum (Al) etc. can be mentioned, for example, Therefore, what is necessary is just to use copper foil, aluminum foil, etc.

  The pressure-sensitive adhesive layer 12 is provided for attaching the metal tape body 4 to the liquid crystal module 1 or the like, and a normal pressure-sensitive adhesive or adhesive can be used. For example, the adhesive layer 12 is not formed on the entire surface of the metal tape main body 4 but is partially formed by omitting a part thereof so that the metal tape main body 4 can be easily peeled and curling is suppressed. In this case, the adhesive force (adhesive force) to the liquid crystal module 1 or the like is reduced. Therefore, in the present invention, the pressure-sensitive adhesive layer 12 is applied and formed on the entire surface of the metal tape body 4 so as to ensure the pressure-sensitive adhesive force (adhesive force).

  For the mount 11, paper having an appropriate thickness is usually used, but is not limited thereto, and may be a plastic sheet, for example. When paper or the like is used for the mount 11, it is necessary to release the surface of the adhesive layer 12 so that the adhesive layer 12 can be easily peeled off. By subjecting the surface of the mount 11 to a mold release process, the metal tape body 4 having the adhesive layer 12 can be quickly peeled off from the mount 11.

  When using the metal tape, as shown in FIG. 3, the metal tape main body 4 is peeled off together with the adhesive layer 12 from the mount 11, and this is attached to the back surface of the liquid crystal module 1, for example. At this time, even if the mount 11 is subjected to the mold release treatment, the adhesive force (adhesive force) of the adhesive layer 12 works, so it is necessary to apply a certain amount of tension. Due to the tension at the time of peeling, as shown in FIG. 4A, the metal tape main body 4 after being peeled is curled, and the attaching operation becomes very difficult. For example, even if the metal tape body 4 that has been curled once is extended by hand, the curl cannot be completely eliminated as shown in FIG. It is difficult to extend it well by hand, but it is also difficult to attach the corrugated metal tape body 4 to the liquid crystal module 1.

  Therefore, in the metal tape 10 of the present embodiment, embossing is performed on the mount 11, the adhesion area between the mount 11 and the adhesive layer 12 is reduced, and less tension is applied when the metal tape body 4 is peeled off, The generation of the curl is suppressed.

  FIG. 5 shows a laminated state of the metal tape main body 4 having the embossed mount 11 and the adhesive layer 12. Of the two front and back surfaces of the mount 11, the bonding surface 11a of the metal tape main body 4 is embossed to form a convex portion 11b. The adhesive layer 12 comes into contact with the mount 11 only at the convex portion 11b, and the bonding area between the mount 11 and the adhesive layer 12 is greatly reduced.

  For example, as shown in FIG. 6, the metal tape main body 4 is bonded to the mount 11 in a plurality of arrayed forms. For example, as shown in FIG. 7, if embossing is performed so that the circular protrusions 11 b are arranged on the surface of the mount 11, the adhesion area of each metal tape body 4 to the adhesive layer 12 can be reduced. In addition, the shape of the convex part 11b formed by embossing is not restricted circularly, It can be made into arbitrary shapes.

  For embossing of the mount 11, for example, a press device may be used to compress a portion other than the portion that becomes the convex portion 11 b of the mount 11. When the mount 11 is formed of paper, it is possible to reduce the thickness of the portion other than the convex portion 11b by the compression and form the convex portion 11b. Of course, not limited to this, for example, as shown in FIG. 8, it is also possible to deform the mount 11 with a press or the like to form irregularities and form the convex portions 11b. Further, for example, when the mount 11 is a plastic sheet or the like, it is possible to form irregularities during molding or the like.

  As described above, embossing is performed on the mount 11 to reduce the adhesion area with the adhesive layer 12 formed on the surface of the metal tape main body 4, thereby necessitating the peeling of the metal tape main body 4 from the mount 11. Less tension is required. Thereby, the metal tape main body 4 becomes difficult to curl, and the tape attaching operation to the liquid crystal module 1 can be easily performed. The improvement in workability of the tape affixing work leads to an improvement in work efficiency in the liquid crystal assembly work.

  Moreover, curling of the metal tape main body 4 also leads to suppression of wrinkles, streaks and the like in the metal tape main body, and the aesthetic appearance of the metal tape main body 4 to be attached can be maintained.

It is a schematic plan view of the back surface of a liquid crystal module, (a) shows the state before metal tape main body sticking, (b) shows the state after metal tape main body sticking, respectively. It is sectional drawing which shows schematic structure of a metal tape. It is a schematic sectional drawing of the state which started peeling of the metal tape main body from the mount. (A) is a schematic diagram of the curled metal tape main body, (b) is a schematic diagram of the state which extended the curled metal tape main body. It is sectional drawing which shows typically the state which embossed the mount. It is a schematic plan view of the metal tape which bonded the some metal tape main body on the mount. It is a schematic perspective view which shows an example of the mount used for the metal tape shown in FIG. It is typical sectional drawing which shows the other example of embossing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal module, 2 Liquid crystal display panel, 3 Flexible wiring board, 4 Metal tape main body, 10 Metal tape, 11 Mount, 11b Convex part, 12 Adhesive layer

Claims (3)

A metal tape in which a metal tape body having an adhesive layer is releasably bonded onto a release-treated mount,
The metal tape characterized by the embossing being given to the bonding surface of the said metal tape main body of the said mount.   2. The metal tape according to claim 1, wherein the metal tape body is attached to a liquid crystal module and used for noise countermeasures.   The metal tape according to claim 1 or 2, wherein the metal tape main body is made of Cu or Al.

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