JP4733573B2 - Shield material and manufacturing method thereof - Google Patents

Description

  The present invention relates to a shielding material and a manufacturing method thereof, and more particularly to a shielding material that shields electromagnetic waves leaking from a PDP (plasma display panel) and a manufacturing method thereof.

  In recent years, PDPs (plasma display panels) having features such as a wide viewing angle, good display quality, and a large screen have been rapidly expanded in applications such as multimedia display devices.

  A PDP is a display device using gas discharge, which excites gas sealed in a tube by discharge and generates a line spectrum with a wide wavelength from the ultraviolet region to the near infrared region. A phosphor is disposed in the PDP tube, and this phosphor is excited by a line spectrum in the ultraviolet region to generate light in the visible region.

  Electromagnetic waves such as microwaves and ultra-low frequencies are generated by driving the PDP and leak to the outside, albeit slightly. Since the regulations for leakage of electromagnetic waves are stipulated in information equipment and the like, it is necessary to suppress the leakage of electromagnetic waves below a specified value.

  In addition, since the display screen of the PDP is smooth, the incident light is reflected when the light from the outside is incident on the display screen, and the contrast ratio of the screen is reduced. Therefore, the reflection of the incident light from the outside is suppressed. There is a need.

  Further, the near infrared wavelength emitted from the PDP is close to the wavelength (800 nm to 1000 nm) used in the remote control device and optical communication, and if these devices are operated near the PDP, malfunction may occur. Therefore, it is necessary to prevent leakage of near infrared rays from the PDP.

  For these purposes, a shield material is installed in front of the display screen of the PDP.

  Conventional shield materials include a type that is directly attached to a display screen of a PDP. As shown in FIG. 1, in such a shield material, a metal pattern layer constituted by a sticking adhesive layer 120, a resin layer 140, a copper mesh portion 160a, and a ground (grounding) portion 160b connected thereto on the separator 100. 160 are formed in order. An antireflection / near-infrared absorbing film 200 is formed on the copper mesh portion 160a of the metal pattern layer 160 via an adhesive layer 180, and the ground portion 160b is exposed at the periphery of the shield material. . Then, the separator 100 is peeled off from the shield material, and the exposed adhesive layer 120 for pasting is pasted on the display screen of the PDP. Furthermore, the ground portion 160b exposed at the peripheral edge portion of the shield material is connected to the ground terminal of the PDP casing.

As similar to such a shielding material, Patent Document 1 describes that an optical filter provided with an electromagnetic wave shielding layer or an antireflection layer is directly attached to a display screen of a PDP through adhesiveness.
JP 2005-107199 A

  In the shield material of FIG. 1 described above, the antireflection / near infrared absorption film 200 having a certain degree of rigidity is formed on the copper mesh portion 160a of the metal pattern layer 160, and the metal pattern layer including the earth portion 160b is formed. A thin resin layer 140, a sticking adhesive layer 120 (about 45 μm in total) and a separator 100 are formed under the whole.

  In such a shield material, when the separator 100 is peeled off and the adhesive layer 120 for application is attached to the PDP, only the thin resin layer 120 and the adhesive layer 140 exist under the ground portion 160b of the metal pattern layer 160. In this case, the rigidity of the portion is weakened and curling is likely to occur, which may make it difficult to paste the display on the display screen of the PDP.

  The present invention has been created in view of the above problems, and in a shield material that is directly attached to a display screen of a PDP, even if the separator is peeled off, the PDP is stably prevented from being turned over at the ground. It aims at providing the shielding material which can be affixed on the display screen, and its manufacturing method.

In order to solve the above-mentioned problems, the present invention relates to a shield material, which is a metal pattern layer composed of a sticking adhesive layer attached to a PDP, a metal pattern portion and a ground portion connected to the peripheral portion of the metal pattern portion. And the metal pattern layer formed on the adhesive layer for application, with the metal pattern portion embedded in the adhesive layer for application and the lower surface of the ground portion exposed. A resin layer formed on the entire metal pattern layer, an adhesive layer formed on the resin layer corresponding to the entire metal pattern layer, and the adhesive layer corresponding to the entire metal pattern layer. And an antireflection film formed on the layer , wherein the antireflection film further has a near infrared absorption function .

  In the shielding material of the present invention, the separator provided on the lower surface of the sticking adhesive layer is peeled off, and the exposed sticking adhesive layer is pasted on the display screen of the PDP to function as an electromagnetic shielding material.

  In the shield material of the present invention, an antireflection film having a certain degree of rigidity is formed through the resin layer and the adhesive layer over the entire surface opposite to the surface on which the separator of the metal pattern layer is provided. Therefore, even if the separator is peeled off from the shield material, the ground part of the metal pattern layer is reinforced by the antireflection film to ensure rigidity, so that the ground part is not curled and can be stably attached to the PDP. can do. The antireflection film may further have a near infrared absorption function.

  As described above, in the present invention, since the ground portion of the metal pattern layer is reinforced by the antireflection (or near infrared absorption) film even if the separator is peeled off, the shield material is stably displayed on the PDP. Can be pasted on the screen.

  Embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
2 is a cross-sectional view showing the shield material according to the first embodiment of the present invention, FIG. 3 is a cross-sectional view showing the state in which the shield material is affixed to the display screen of the PDP, and FIGS. It is sectional drawing which shows a method.

  As shown in FIG. 2, in the shielding material 1 of the first embodiment of the present invention, a separator 10 (film thickness: about 75 μm) formed by forming a release layer made of silicone or the like on a PET (polyethylene terephthalate) film. ) Is formed on the adhesive layer 12 (film thickness: about 25 μm). A metal pattern layer 14 (film thickness: about 10 μm) made of copper or the like that functions as an electromagnetic wave shielding layer is formed on the sticking adhesive layer 12. The metal pattern layer 14 includes a mesh-shaped metal pattern portion 14a disposed in the central main portion and a ground (ground) portion 14b connected to the peripheral portion and arranged in a ring shape. The metal pattern layer 14 is formed on the sticking adhesive layer 12 with the metal pattern portion 14a embedded in the sticking adhesive layer 12, and the lower surface of the ground part 14b is exposed. That is, the sticking adhesive layer 12 is partially formed below the metal pattern portion 14a of the metal pattern layer 14, and the lower surface of the ground portion 14b is exposed.

  A resin layer 16 (film thickness: about 15 μm) is formed on the entire metal pattern layer 14. The resin layer 16 may be formed by applying twice or three times, or may be formed by stacking different kinds of resins. Further, an adhesive layer 18 (film thickness: about 25 μm) is formed on the resin layer 16 corresponding to the entire metal pattern layer 14. An antireflection / near-infrared absorbing film 20 (film thickness: about 100 μm) is formed on the adhesive layer 18 corresponding to the entire metal pattern layer 14. The antireflection / near-infrared absorbing film 20 is configured by forming an antireflection layer on the upper surface of a PET film and forming a near-infrared absorbing layer on the lower surface. Or you may comprise by affixing the PET film in which the antireflection layer was formed on the PET film in which the near-infrared absorption layer was formed. A TAC (triacetyl cellulose) film may be used instead of the PET film.

  The antireflection / near infrared absorption film 20 may be an antireflection film having only an antireflection function, and the adhesive layer 18 may have a near infrared absorption function, or a near infrared absorption film may be separately provided between other layers. May be.

  As shown in FIG. 3, in the shield material 1 of the present embodiment, the separator 10 is peeled along the interface between the peelable layer of the separator 10 and the sticking adhesive layer 12 when installed on the display screen of the PDP. And the adhesion layer 12 for sticking exposed to the lower surface side is stuck on the display screen (glass arrange | positioned ahead) of PDP3, and functions as an electromagnetic wave shielding material. Further, the ground portion 14b is connected to the ground terminal of the PDP casing by a connection fitting or the like.

  In the shielding material 1 of this embodiment, the antireflection / near infrared absorbing film having a certain degree of rigidity through the resin layer 16 and the adhesive layer 18 over the entire surface opposite to the surface on which the separator 10 of the metal pattern layer 14 is provided. 20 is formed. Therefore, even if the separator 10 is peeled off from the shield material 1, the ground portion 14b of the metal pattern layer 14 is reinforced by the antireflection / near-infrared absorbing film 20 to ensure rigidity. There is no fear.

  For example, since the thickness from the lower surface of the ground portion 14b to the upper surface of the antireflection / near-infrared absorbing film 20 is about 150 μm or more by adopting the film thickness configuration as described above, even after the separator 10 is peeled off The overall rigidity of the metal pattern layer 14 including the ground portion 14b is reinforced, and the ground portion 14b can be handled stably without being turned up.

Next, the manufacturing method of the shielding material 1 of this embodiment is demonstrated. As shown in FIG. 4A, first, a first separator 30 composed of a PET film and a release layer made of silicone or the like formed thereon is prepared. Next, an acrylic adhesive layer 18 and a polyester resin layer 16 are sequentially formed on the release layer of the first separator 30. The resin layer 16 may be formed by applying twice or three times, or may be formed by stacking different kinds of resins.
Furthermore, a copper foil 14 x blackened on one surface by electrolytic plating is prepared, and the blackened surface of the copper foil 14 x is stuck on the resin layer 16. In this way, a structure in which the adhesive layer 18, the resin layer 16, and the copper foil 14x are laminated on the first separator 30 in order from the bottom is prepared.

  Next, as shown in FIG. 4B, a resist film (not shown) is patterned on the copper foil 14x by a roll-to-roll method, and the copper foil 14x is wet-etched using the resist film as a mask. Then, the metal pattern layer 14 is formed. Thereafter, the resist film is removed. The metal pattern layer 14 includes a metal pattern portion 14a disposed at the central main portion and a ground portion 14b disposed in a ring shape at the peripheral edge portion connected to the metal pattern portion 14a.

  At this time, since the adhesive layer 18 that functions as a reinforcing layer is present in addition to the resin layer 16 between the first separator 30 and the copper foil 14x, it can withstand the pressure of the etching solution supplied in a spray form. The copper foil 14x can be etched stably. Further, by disposing the resin layer 16 between the copper foil 14x and the adhesive layer 18, the adhesive layer 18 is prevented from being discolored by the etching solution, and the transparency of the adhesive layer 18 can be maintained.

  Next, the exposed surface of the metal pattern layer 14 is blackened by subjecting the metal pattern layer 14 to a chemical conversion treatment with a mixed solution of a sodium chlorite aqueous solution and a caustic soda aqueous solution. Since the surface of the metal pattern layer 14 on the side of the resin layer 16 has already been blackened in the above-described process, both sides and side surfaces of the metal pattern layer 14 are all blackened when this process is completed.

  Subsequently, as shown in FIG. 4C, an adhesive film covering the metal pattern portion 14a of the metal pattern layer 14 and exposing the ground portion 14b is disposed and heated at about 70 ° C. The adhesive layer 12 for sticking is formed by pressing. Thereby, the adhesive layer 12 for sticking is formed by embedding the metal pattern portion 14a with the ground portion 14b exposed, and the upper surface thereof is flattened. Further, as shown in FIG. 4C, the second separator 10 is stuck on the sticking adhesive layer 12.

  Next, as shown in FIG. 5A, the first separator 30 is peeled along the interface between the first separator 30 and the adhesive layer 18 to expose the adhesive layer 18. After that, as shown in FIG. 5B, an antireflection / near-infrared absorbing film 20 having a size corresponding to the entire metal pattern layer 14 is formed on the exposed surface of the adhesive layer 18 (the lower surface in FIG. 5B). Adhere.

  In addition, before forming the 2nd separator 10, the 1st separator 30 may be peeled and the antireflection / near-infrared absorption film 20 may be stuck, and the order of a manufacturing process can be set arbitrarily.

  Thus, the shield material 1 (FIG. 2) of the first embodiment is formed.

  In the manufacturing method described above, when preparing the structure (FIG. 4A) in which the adhesive layer 18, the resin layer 16, and the copper foil 14 x are laminated on the first separator 30, the adhesive layer 18 is the resin layer 16. It is necessary to use a material having a relatively high adhesive strength, and it is often impossible to freely select various materials that can be reworked (replaced).

  For this reason, in the prior art, an adhesive layer that is difficult to rework is used as the adhesive layer 120 for sticking (FIG. 1) and attached to the PDP. However, it is difficult to paste it, and the yield may be reduced.

  However, in the present embodiment, the adhesive layer 12 for pasting that is attached to the display screen of the PDP is different from the adhesive layer 18 that functions as a reinforcing layer when patterning the copper foil 14x. Since what can be reworked (replaced) can be freely selected and used, the manufacturing yield of the shielding material can be improved.

(Second Embodiment)
FIG. 6 is a cross-sectional view showing a shield material according to a second embodiment of the present invention, FIG. 7 is a cross-sectional view showing a state in which the shield material is similarly attached to the display screen of the PDP, and FIGS. It is sectional drawing which shows a method.

  A feature of the second embodiment is that the structure in which the metal pattern layer 14, the resin layer 16, and the adhesive layer 18 in the first embodiment are formed in order from the bottom is turned upside down, and the ground portion 14b is formed below the metal pattern layer 14. It is to arrange a near-infrared absorbing film that reinforces.

  As shown in FIG. 6, in the shield material 2 of the second embodiment, the adhesive layer 12 for sticking is formed on the separator 10, and the near-infrared absorbing film 22 is formed thereon. A first adhesive layer 18 is formed on the near-infrared absorbing film 22 to cover the whole. A resin layer 16 corresponding to the entire near-infrared absorbing film 22 is formed on the first adhesive layer 18.

  Furthermore, a metal pattern layer 14 that functions as an electromagnetic wave shielding layer is formed on the resin layer 16 corresponding to the entire near-infrared absorbing film 22. The metal pattern layer 14 is composed of a metal pattern portion 14 a disposed in the central main portion and a ground portion 14 b connected to the peripheral portion in a ring shape, and the ground portion 14 b is adhered onto the near infrared ray absorbing film 22. The layer 18 and the resin layer 16 are disposed.

  Further, the second adhesive layer 28 is partially formed on the metal pattern layer 14 so as to cover the metal pattern portion 14a of the metal pattern layer 14 and expose the ground portion 14b. The second adhesive layer 28 is formed by embedding the metal pattern portion 14b, and the upper surface thereof is formed flat. Moreover, the antireflection film 24 is stuck on the second adhesive layer 28, and the ground portion 14b is exposed.

  As described above, in the second embodiment, the near-infrared absorbing film 22 having a certain degree of rigidity is provided under the metal pattern layer 14 through the resin layer 16 and the first adhesive layer 18 over the entire metal pattern layer 14, and the ground portion 14b. Is reinforced.

  As shown in FIG. 7, in the shield material 2 of the second embodiment, the separator 10 is peeled from the shield material 2 when installed on the display screen of the PDP, as in the first embodiment. And the exposed adhesion layer 12 for sticking is stuck on the display screen (glass arrange | positioned ahead) of PDP3, and functions as an electromagnetic wave shielding material. Further, the ground portion 14b is connected to the ground terminal of the PDP casing by a conductive tape or the like.

  In the second embodiment, the near-infrared film 22 is arranged so as to correspond to the entire metal pattern layer 14 on the surface side of the metal pattern layer 14 where the separator 10 is provided, thereby reinforcing the ground portion 14b to ensure rigidity. is doing. Therefore, even after the separator 10 is peeled off, the problem of curling of the ground portion 14b of the metal pattern layer 14 is eliminated, and the sealing material can be stably attached to the display screen of the PDP. .

  As shown in FIG. 8A, the manufacturing method of the shielding material 2 according to the second embodiment is as follows. First, the first adhesive layer 18 and the resin layer are formed on the first separator 30 by the same method as the first embodiment. A structure in which 16 and the metal pattern layer 14 are laminated is created. Next, as shown in FIG. 8B, an antireflection film 24 is stuck on the metal pattern portion 14a via the second adhesive layer 28 so that the ground portion 14b of the metal pattern layer 14 is exposed.

  Next, as shown in FIG. 8C, the lower surface of the first adhesive layer 18 is exposed by peeling the first separator 30. Subsequently, as shown in FIG. 9A, a near-infrared absorbing film 22 having a size corresponding to the entire metal pattern layer 14 is formed on the exposed surface (the lower surface in FIG. 9A) of the first adhesive layer 18. Adhere. Further, as shown in FIG. 9B, the exposed surface of the near-infrared absorbing film 22 (the lower surface in FIG. 9B) is attached through the adhesive layer 12 so as to correspond to the entire metal pattern layer 14. 2 The separator 10 is stuck.

  In addition, before sticking the antireflection film 24, the 1st separator 30 may be peeled and the near-infrared film 22 and the 2nd separator 10 may be stuck, and the order of a manufacturing process can be set arbitrarily. .

  The shield material 2 (FIG. 6) of 2nd Embodiment is obtained by the above.

  Also in the manufacturing method of the second embodiment, the adhesive layer 12 for application to be attached to the PDP can be different from the first adhesive layer 18 used as a reinforcing layer when patterning the copper foil 14x. Any material that can be reworked (replaced) can be freely selected and used, and the production yield of the shield material can be improved.

FIG. 1 is a cross-sectional view showing a conventional shielding material. FIG. 2 is a cross-sectional view showing the shield material according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view showing a state where the shield material according to the first embodiment of the present invention is affixed to the display screen of the PDP. 4A to 4C are cross-sectional views (No. 1) showing the manufacturing method of the shield material according to the first embodiment of the present invention. 5A and 5B are sectional views (No. 2) showing the method for manufacturing the shield material according to the first embodiment of the present invention. FIG. 6 is a cross-sectional view showing a shield material according to a second embodiment of the present invention. FIG. 7 is a cross-sectional view showing a state where the shield material of the second embodiment of the present invention is affixed to the display screen of the PDP. 8A to 8C are cross-sectional views (No. 1) showing the method for manufacturing the shield material according to the second embodiment of the present invention. FIGS. 9A and 9B are sectional views (No. 2) showing the method for manufacturing the shield material according to the second embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 ... Shielding material, 3 ... PDP, 10, 30 ... Separator, 12 ... Adhesive layer for sticking, 14 ... Metal pattern layer, 14a ... Metal pattern part, 14b ... Ground part, 16 ... Resin layer, 18, 28 ... Adhesive layer, 20 ... antireflection / near infrared absorbing film, 22 ... near infrared absorbing film, 24 ... antireflection film.

Claims (6)

An adhesive layer for application to be attached to the PDP;
A metal pattern layer composed of a metal pattern portion and a ground portion connected to the peripheral portion thereof, wherein the metal pattern portion is embedded in the adhesive layer for sticking and a lower surface of the ground portion is exposed In the metal pattern layer formed on the adhesive layer for sticking,
A resin layer formed by covering the entire metal pattern layer;
An adhesive layer formed on the resin layer corresponding to the entire metal pattern layer;
An antireflection film formed on the adhesive layer corresponding to the entire metal pattern layer ,
The said antireflection film is further equipped with the near-infrared absorption function, The shielding material characterized by the above-mentioned . It further has a separator attached to the lower surface of the adhesive layer for application,
The shielding material according to claim 1, wherein when the adhesive layer for application is attached to the PDP, the separator is peeled off to expose the adhesive layer for application.   The shielding material according to claim 1, wherein the adhesive layer for application can be replaced. Preparing a structure in which an adhesive layer, a resin layer, and a metal layer are sequentially formed on the first separator;
Patterning the metal layer to form a metal pattern layer composed of a metal pattern portion and a ground portion connected to the periphery of the metal pattern portion; and
Forming a second separator on the metal pattern part via an adhesive layer for application so that the ground part is exposed;
Before or after the step of forming the second separator, the first separator is peeled to expose the adhesive layer, and an antireflection film corresponding to the entire metal pattern layer is formed on the exposed surface of the adhesive layer. A process ,
The said antireflection film is further provided with the near-infrared absorption function, The manufacturing method of the shielding material characterized by the above-mentioned . Preparing a structure in which a first adhesive layer, a resin layer, and a metal layer are sequentially formed on the first separator;
Patterning the metal layer to form a metal pattern layer composed of a metal pattern portion and a ground portion connected to the periphery of the metal pattern portion; and
Forming an antireflection film on the metal pattern portion of the metal pattern layer through a second adhesive layer so that the ground portion is exposed;
Before or after the step of forming the antireflection film, the first pressure-sensitive adhesive layer is exposed by peeling off the first separator, and the near-infrared light corresponding to the entire metal pattern layer on the exposed surface of the first pressure-sensitive adhesive layer Forming an absorbent film;
Forming a second separator on the exposed surface of the near-infrared absorbing film via a sticking adhesive layer.   The said separator is peeled when installing the shielding material obtained by the said manufacturing method in PDP, The exposed surface of the said adhesion layer for sticking is stuck to PDP, The Claim 4 or 5 characterized by the above-mentioned. Manufacturing method of shield material.

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