WO2005083157A1 - 灰色化処理面を備える表面処理銅箔、その表面処理銅箔の製造方法及びその表面処理銅箔を用いたプラズマディスプレイの前面パネル用の電磁波遮蔽導電性メッシュ - Google Patents
灰色化処理面を備える表面処理銅箔、その表面処理銅箔の製造方法及びその表面処理銅箔を用いたプラズマディスプレイの前面パネル用の電磁波遮蔽導電性メッシュ Download PDFInfo
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- WO2005083157A1 WO2005083157A1 PCT/JP2005/003386 JP2005003386W WO2005083157A1 WO 2005083157 A1 WO2005083157 A1 WO 2005083157A1 JP 2005003386 W JP2005003386 W JP 2005003386W WO 2005083157 A1 WO2005083157 A1 WO 2005083157A1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0094—Shielding materials being light-transmitting, e.g. transparent, translucent
- H05K9/0096—Shielding materials being light-transmitting, e.g. transparent, translucent for television displays, e.g. plasma display panel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/20—Constructional details
- H01J11/34—Vessels, containers or parts thereof, e.g. substrates
- H01J11/44—Optical arrangements or shielding arrangements, e.g. filters, black matrices, light reflecting means or electromagnetic shielding means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
- H05K3/382—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the metal
- H05K3/384—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the metal by plating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0335—Layered conductors or foils
- H05K2201/0355—Metal foils
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/03—Metal processing
- H05K2203/0307—Providing micro- or nanometer scale roughness on a metal surface, e.g. by plating of nodules or dendrites
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
- H05K2203/0703—Plating
- H05K2203/0723—Electroplating, e.g. finish plating
Definitions
- Surface-treated copper foil having a gray-treated surface, a method for producing the surface-treated copper foil, and an electromagnetic wave shielding conductive mesh for a front panel of a plasma display using the surface-treated copper foil
- the present invention relates to a surface-treated copper foil having a gray-treated surface and an electromagnetic wave shielding metal mesh for a front panel of a plasma display using the surface-treated copper foil.
- the present invention provides a surface-treated copper foil suitable for producing an electromagnetic wave shielding conductive mesh for a front panel of a plasma display.
- the conductive mesh for shielding of a plasma display panel has changed from a metallized fiber fabric to a conductive mesh.
- Several methods have been established for the production of this conductive mesh.
- One method is to laminate the surface-treated copper foil on a PET film and attach them together, and then to manufacture them using photolithographic etching.
- the other is a conductive mesh of the surface-treated copper foil alone, in which the surface-treated copper foil is etched together with the supporting substrate by photolithographic etching, and then the supporting substrate is peeled off.
- the conductive mesh is manufactured by the above-described method, the conductive mesh itself is incorporated in the front panel, and the surface force can be visually recognized through the front glass.
- One surface of the surface-treated copper foil processed into the conductive mesh is treated to be black to enhance the brightness of transmitted light.
- a black lining process or the like for forming a copper oxide layer for improving the adhesion of the multilayer printed wiring board to the resin layer of the inner circuit has been diverted.
- the above-described blackening process has a serious problem. That is, when a large amount of copper black oxide is applied to the surface of the copper foil, a good blackened surface is certainly obtained. However, the black oxidized product of copper formed on the surface of the copper foil is more likely to fall off from the blackened surface as the amount of adhesion increases, and a so-called powder drop phenomenon occurs, and the blackened surface is immediately damaged. Handling becomes difficult. Further, the black color tone lacks stability.
- the dropped black oxide is mixed into an unnecessary portion, or is dispersed in the transparent adhesive layer during the transparency treatment for integrating with the glass of the front panel, and the transparency is reduced. Can also be a factor of deteriorating.
- a drawback of the conventional surface-treated copper foil having a brownish surface is that the brownish surface is not uniform in color but has unevenness on the entire surface.
- the brown treatment in the same plane has not been made uniform, and this has caused a variation in the cross-sectional shape of the mesh obtained by etching.
- the brown surface was susceptible to damage by rubbing the surface lightly.
- the copper foil having the blackened surface and the browned surface described above has a problem in the stability of the color tone in terms of V and misalignment. In order to reduce the variation between lots, strict control of the manufacturing conditions is required. This requires a lot of process management labor and cost, and there are certain limits to lowering product prices and supplying them to the market.
- Prior art that is generally considered relevant includes the following documents.
- Non-Patent Document 1 Technical Trends of PDP Materials Hitachi Chemical Technical Report No. 33 (1999
- Patent Document 1 JP-A-11-186785
- the copper foil having the blackened surface and the browned surface described above has a problem in terms of a color tone that can be confirmed in a state of the copper foil, and is added to the electromagnetic wave shielding conductive mesh. It did not take into account the color tones when incorporated into the front panel of a plasma display.
- a front filter When manufacturing a conductive mesh 15 with a 200 ⁇ m pitch and a line width of 20 m or less, prepare a PET film F as shown in Fig. 14 (a) and provide an adhesive layer 20 on its surface. Fig. 14 (b ). Then, as shown in FIG. 14 (c), a metal seed layer S having a thickness of not more than m is formed on the adhesive layer 20 by using a sputtering method, an electroless plating method, etc. As shown in d), a copper layer C with a level of 3 m or less is formed by electrolytic copper plating.
- an etching resist layer R is formed on the copper layer C as shown in FIG. 14 (e), and a conductive mesh pattern is formed on the etching resist layer R as shown in FIG. 15 (f).
- Exposure of P, development and etching as shown in FIG. 15 (g) results in the state shown in FIG. 15 (h), and removal of the etching resist layer R results in the state shown in FIG. 15 (i). It becomes.
- the surface of the conductive mesh 15 is subjected to a blackening treatment, so that a blackening treatment layer 17 is formed on the surface of the conductive mesh as shown in FIG. 15 (j).
- the blackening process is completed, the first transparent substrate 19a constituting the front filter is brought into contact with the blackened conductive mesh 5 ′ as shown in FIG. 16 (k) and pressed.
- the blackened conductive mesh 15 ′ is pushed into the adhesive layer 20 to perform the transparentizing process.
- the PET film is peeled off.
- the front surface filter 11 is completed by bonding the adhesive layer 20 and the second transparent substrate 19b.
- the inventors of the present invention have, as a result of earnest research, come up with the idea of manufacturing a conductive mesh for shielding electromagnetic waves using a surface-treated copper foil having a grayed surface described below.
- a surface-treated copper foil with this grayed surface electromagnetic wave shielding is required before the transparentizing process in the manufacturing process of the front filter of the plasma display panel.
- the color of the surface of the conductive mesh for use is gray, and the surface of the conductive mesh for shielding electromagnetic waves turns black after the transparency treatment, and becomes visible.
- the surface-treated copper foil provided with the gray-treated surface according to the present invention includes a case where the surface treatment layer is not provided and a case where the surface treatment copper layer is provided. Therefore, although the heat-resistant treatment layer is not essential, it is necessary to ensure long-term storage properties as a surface-treated copper foil.
- the surface-treated copper foil according to the present invention will be described.
- the surface-treated copper foil according to the present invention is "a surface-treated copper foil provided with a gray-treated surface on a rough surface of an electrolytic copper foil, and the gray-treated surface is weight provided on one surface of a copper foil layer thickness 200mgZm 2 - a cobalt sulfate plated layer of 350MgZm 2, and a surface treated copper foil, wherein the cross-sectional height of graying treated surface of its is 200nm or less (Hereinafter, referred to as “first surface-treated copper foil.”)
- FIG. 1 schematically shows a cross-sectional layer configuration of the surface-treated copper foil la.
- FIG. 1 a cobalt sulfate plating layer 4 is formed on the rough surface of the electrolytic copper foil 7, and the opposite surface (corresponding to a glossy surface in the case of the electrolytic copper foil) is made of fine copper particles 3 and rough.
- the surface-treated copper foil la subjected to the dani-treatment is schematically described as an example.
- the opposite side of the copper foil used at this time may be subjected to roughening treatment or not subjected to roughening treatment. Therefore, FIG. 2 schematically shows a surface-treated copper foil lb when the roughening treatment on the opposite surface is omitted.
- the roughening treatment layer 2 composed of the fine copper particles 3 is formed for the purpose of improving the adhesiveness to the base material or the like, and may be provided as needed.
- a method of forming the roughened layer 2 a method of adhering and forming fine copper particles as described above, a method of adhering fine copper oxide, and the like can be adopted. There is no limitation on the dani processing method
- the cobalt sulfate plating layer 4 is provided on the roughened surface of the copper foil layer 7 having certain irregularities.
- the roughness of the rough surface the roughness corresponding to the rough surface of electrolytic copper foil with a nominal thickness of 35 / zm or less is most appropriate, and the tip of the stylus has a radius of curvature of 2 m.
- the average roughness (Ra) specified in JIS B 0601 when measured with a needle-type roughness meter is within 1.O / zm or less, and the 10-point average roughness (Rz) is within 4.O / zm or less. Is preferred.
- the average roughness (Ra) is less than or equal to 0, and the 10-point average roughness (Rz) is less than or equal to 2.8 m.
- the stability of the gray color tone of the surface-treated copper foil is dramatically improved, and the black color tone after the transparency processing in the front panel manufacturing process of the plasma display panel is also less varied.
- the term "conorelet sulfate layer 4" as used herein means a layer formed by a plating method using a cobalt sulfate solution.
- the cobalt sulfate plating layer 4 can be visually recognized as gray in the state of the surface-treated copper foil.
- the transparent display process was performed in the above-mentioned front panel manufacturing process of the plasma display panel, and the surface of the grayed surface was covered with a resin film or an adhesive resin, it was visually recognized as black. You can do it.
- This change in color is caused by the fact that when dark-colored clothes get wet with water, a water curtain is formed on the surface of the garment that should have been rough, and a smooth surface is formed. As a result, the same effect as visually recognizable as a darker color tone can be obtained.
- the cobalt sulfate plated layer 4 by those of the adopted manufacturing methods weight thickness 200MgZm 2 one 350 mg / m 2 to be described later, excellent in solubility in copper etching solution, and, graying surface Can be formed.
- Cobalt layer of copper foil having a blackish message key film using a conventional cobalt layer has a weight thickness is LOOOmgZm 2 before and after, were those different in quality that solubility of very Atsugu plated layer .
- the dissolution rate of the copper etchant slows down, and the element itself, cobalt, accumulates at a high concentration in the copper etchant, causing a drop in the etchant titer.
- the converted weight in the present invention is a value converted into the weight of cobalt. Convert weight, the surface-treated copper foil is dissolved in an acid solution to obtain the cobalt amount per unit area by plasma emission spectrometry or the like, in which translated into a weight per surface treated copper foil lm 2.
- a second feature of the surface-treated copper foil according to the present invention is that the gray-finished surface has a cross-sectional height of 200 nm or less, which is not extremely rough. Is a major feature. That is, it can be said that the surface is extremely smooth and gray. However, to avoid misunderstanding, it should be noted that there is naturally a variation within the normal manufacturing process, and it is not necessary that the cross-sectional height at all positions be 200 nm or less. It is natural that there may be cross-sectional heights exceeding 200 nm that reflect variations in the manufacturing process. FIG.
- FIG. 3 shows a FIB observation image obtained by observing a cross section using a FIB analyzer in order to measure the cross section height of the cobalt sulfate plating layer 4 of the surface-treated copper foil 1 according to the present invention.
- Fig. 3 shows the case where the gray surface is formed on the glossy surface of the electrolytic copper foil. This FIB observation image was observed from a direction having an angle of 60 ° with respect to the surface to be observed.
- the cross section of the grayed surface has certain irregularities.
- the stylus type surface roughness is used. It is common to use a meter.
- the surface roughness is at a level where it is impossible to measure the roughness accurately using a surface roughness meter. Therefore, in the present invention, the maximum difference between the peak and the valley in the field of view of the FIB observation image is defined as the “cross-sectional height” as a value corresponding to Rmax measured by a surface roughness meter.
- the local force indicated by “d” in FIG. 3 is the cross-sectional height of FIG.
- the cobalt sulfate layer 4 is formed with an extremely uniform thickness along the shape of the copper foil surface, and maintains a state of being completely adhered to the underlying copper foil surface. No trouble spots such as the lifting force of the cobalt plating layer 4 were found, and no spots that would give notice of powder falling were found.
- FIGS. 4 and 5 FIB observation of the cross-sectional force of the conventional blackened surface formed on the surface of the copper foil as described above gives the results shown in FIGS. 4 and 5.
- it is a force that the shape constituting the blackened surface grows in a dendritic shape and is considerably protruded from the underlying copper foil. Therefore, when the section height (d) at this time is measured, the case of FIG. In Fig. 5, the force S is about 270nm in Fig. 5, and it can be seen that the surface is considerably rough.
- such a blackened surface with a branch shape is a surface where the dendrites are easily broken and easily damaged, and if the broken pieces fall off, powder falls off Naturally, it is considered to be a cause of color unevenness when visually observed from the blackened surface.
- the surface-treated copper foil according to the present invention described above can be understood from the FIB cross-sectional observation image of FIG. 3 to have an extremely smooth surface. Then, the L value of this grayed surface in the Lab color system is 43 or less.
- the upper limit is not particularly limited, but empirically, the lower limit seems to be about 38.
- the grayed surface of the surface-treated copper foil according to the present invention also has a certain gloss, and it is more preferable to express the degree of the gloss using the gloss.
- the glossiness of the grayed surface according to the present invention is preferably such that the glossiness [Gs (60 °)] is 10 or less as a result of forming the grayed surface on the rough surface of the electrolytic copper foil. is there.
- the gloss is 10 or more, the so-called metallic luster becomes noticeable.
- the lower limit of the glossiness is not defined, but it is empirically that the lower limit is about 0.5. More preferably, the glossiness is in the range of 0.5-3.0. When the glossiness is in this range, the stability of the gray color tone is the best.
- the gray-treated surface of the surface-treated copper foil described above can be visually recognized as black when a transparent resin film is closely attached to the surface.
- the black density when directly observing the grayed surface was 0.7.1-2.2 (measurement conditions: StatusT, Sampling aparture 1.5 X 2 mm, no polarizing filter).
- the black density becomes 1.4 or more (the empirical upper limit is about 1.8).
- the black density of the blackened surface of the surface-treated copper foil that has been used for the electromagnetic shielding mesh of the plasma display panel is about 1.0 or more when directly observing the blackened surface.
- the black density in the present invention is measured based on JIS B 9620 and JIS B 9622, and employs the above-described measurement conditions.
- Second surface-treated copper foil This surface-treated copper foil is obtained by forming a water-proofing treatment layer on the surface of the above-mentioned first surface-treated copper foil to ensure long-term storage.
- FIG. 6 schematically illustrates a cross-sectional layer configuration of a surface-treated copper foil lc provided with a protection layer 5 on both sides.
- FIG. 7 shows a surface-treated copper foil Id in which the roughening treatment is omitted on one side.
- organic protection such as imidazole and benzotriazole
- inorganic protection using zinc alloys such as zinc or brass which are commonly used. It is possible.
- the protection layer may be provided on at least both sides of the surface-treated copper foil according to the present invention, which is to be provided on the opposite side where the cobalt sulfate plating layer is provided. It is a matter of course.
- these protection layers 5 prevent the fine copper particles 3 of the roughening treatment layer 2 from falling off and prevent the cobalt sulfate layer 4 from falling. It not only serves as a protective layer, but also maintains its appearance as a surface-treated copper foil over a long period of time. It is particularly preferable that a zinc-nickel alloy layer or a zinc-cobalt layer be provided on the protection layer 5. It is considered that by using these protection treatment layers 5 in combination with the coconut sulfate layer 4, it functions as a dissolution promoter for dissolving the coconut sulfate layer 4 by etching. That is, dissolution of the cobalt sulfate plating layer 4 occurs more quickly when the zinc-nickel alloy layer or the zinc-cobalt layer is provided than when the cobalt sulfate plating layer 4 exists alone.
- FIG. 8 and FIG. 9 schematically show the cross-sectional layer configuration of a surface-treated copper foil lc provided with a protection layer 5 and a chromate treatment layer 6 on both sides.
- the only difference from the surface-treated copper foil having the protection layer 5 is that it has the chromate treatment layer 6.
- the other configuration is the same.
- the chromate treatment layer 6 is formed on one or both surfaces after the formation of the protection layer 5 made of a zinc nickel alloy or a zinc-conolate alloy or the like. And this The presence of the chromate treatment layer 6 significantly improves the oxidation resistance of the surface-treated copper foil, and effectively prevents cosmetic corrosion such as discoloration.
- the manufacturing method of the first surface-treated copper foil described above employs a manufacturing method including the following steps. This manufacturing method is based on the premise that a stirring bath is employed.
- the copper foil used in the method for producing a surface-treated copper foil according to the present invention does not matter whether or not the roughening treatment is performed on the opposite surface on which the cobalt sulfate plating layer is formed as described above. is there. It should be noted here that the conditions for roughening are not particularly limited.For example, when these ultra-fine copper particles are formed, a copper electrolyte containing arsenic is generally used. Can be used.
- it is a copper sulfate based solution, copper concentration 5—10gZl, sulfuric acid concentration 100—120gZl, chlorine concentration 20—30ppm, 9—Ferakudidine 50—30 Omg / U, liquid temperature 30—40 ° C, current density 5 — 20AZdm 2 etc.
- the rough surface of the above-mentioned copper foil contains cobalt sulfate (heptahydrate) of lOgZl-40g Zl, and has a pH of 4.0 or more and a liquid temperature of 30 ° C or less.
- the concentration of cobalt sulfate the lower the concentration of cobalt sulfate, the better graying state can be produced. If the cobalt sulfate (heptahydrate) in the cobalt sulfate plating solution is less than 10 g / l, the electrodeposition speed of the cobalt sulfate plating layer formed by using a stirring bath is reduced. The thickness of the nickel layer tends to be uneven, resulting in a lack of industrial productivity.
- the amount of cobalt sulfate (heptahydrate) exceeds 40 gZl, the formed cobalt sulfate plating layer is less likely to form dense irregularities, and as a result, does not have a good gray state.
- the solution pH of the cobalt sulfate plating solution at this time is adjusted to a range of 4.0 or more as a target. It is more preferably in the range of 4.5-5.5. Within this range, a good gray cobalt plating layer with good yield can be obtained. It is not preferable to add another electrolyte such as sodium hydroxide or potassium hydroxide in order to adjust the pH. The metallic color is likely to be added to the gray of the cobalt plating layer.
- the solution pH is stabilized in the range of 4.0 or more by maintaining the metal ion concentration in the solution constant.
- the electrodeposited cobalt ions can be dissolved and supplied using a soluble cobalt electrode, or the concentration of metal ions can be continuously monitored to adjust the hydroxyl ion concentration. It is desirable to adopt a method of stabilizing the cobalt ion concentration by appropriately adding the dani cobalt.
- the cobalt sulfate plating solution at this time is preferably used at a temperature of 30 ° C or lower.
- the lower the liquid temperature at this time the better the grayed surface tends to be obtained. If the liquid temperature is set to 30 ° C or less, the method for producing the first surface-treated copper foil A described above is not roughened. Can be obtained.
- the stirring at this time is preferably performed so that the flow rate of the solution as a result of the stirring is in the range of 20 cm / s to 40 cm / s.
- the flow rate of the solution is less than 20 cm / s, in the above solution composition, the supply of ions to the surface to be coated with cobalt to be electrodeposited becomes slow, the time required for electrodeposition becomes long, and the force is obtained. That is, the color tone of the grayed surface to be obtained tends to vary.
- the flow velocity force of the solution exceeds OcmZs, the ion supply speed by stirring becomes too high, the grayed surface becomes closer to black, and the lubricating force becomes more metallic luster. It is no longer the grayed surface that is where it does.
- the current density when performing electrolysis it is to use 4AZdm 2 following current.
- 4AZdm 2 following current.
- a cobalt sulfate plating layer having excellent fine irregularities and excellent adhesion to organic materials can be formed without roughening the copper foil surface.
- a method is used in which an electrolytic current is applied to an excessively thick plating region.
- the current density should be as small as possible.However, considering the industrial productivity, the current density is 0.5 A / d m 2 can be determined as the lower limit.
- the copper foil that has undergone the above steps is washed with water and dried to obtain a surface-treated copper foil having a cobalt sulfate plating layer as a grayed surface.
- washing method and drying method There is no particular limitation on the washing method and drying method here, and it is possible to adopt a method that can be considered normally.
- a surface-treated copper foil having the cobalt sulfate plating layer as a gray-treated surface is produced in the same manner as in the above-mentioned method for producing the first surface-treated copper foil, and thereafter, the surface is protected.
- the formation of the treatment layer is performed. Therefore, the manufacturing flow is as follows: "a) forming a gray cobalt sulfate plating layer on the glossy surface of the copper foil; b) forming a protective coating layer on both sides or one side of the copper foil having the gray cobalt sulfate plating layer formed thereon. C) Then, wash with water and dry.
- the method for producing the first surface-treated copper foil simply includes an additional step of forming a heat-resistant treatment layer.
- the protection layer is formed on both sides or one side of the copper foil on which the formation of the gray cobalt sulfate plating layer has been completed.
- organic protective materials such as imidazole and benzotriazole
- inorganic protective materials such as zinc and zinc alloys such as brass, etc.
- the zinc-nickel alloy plating solution used here is not particularly limited.
- nickel sulfate is used in a nickel concentration of 1 12.5 gZl
- zinc pyrophosphate is used in a zinc concentration of 0.1-lgZl
- pyrophosphate is used.
- the conditions such as potassium acid 50-500 gZl, liquid temperature 20-50 ° C, pH 8-11, current density 0.3-lOAZdm 2 are adopted.
- zinc-cobalt alloy plating will be described.
- the zinc-conoleto alloy plating solution used here is not particularly limited, but, for example, for example, the cobalt concentration is 1-2.5 g / l using cobalt sulfate, and the zinc concentration is 0.1-2.5 g using zinc pyrophosphate. lg / l, potassium pyrophosphate 50-500 gZl, liquid temperature 20-50. C, pH8-11, current density. 3—Use the conditions of lOAZdm 2 .
- the anti-corrosion treatment layer obtained by combining this zinc-cobalt alloy plating with the chromate treatment described later exhibits particularly excellent corrosion resistance.
- a chromate treatment step may be provided after the formation of the above-described anti-reflection treatment layer.
- a replacement treatment in which the chromate solution is brought into contact with the surface of the copper foil or an electrolytic chromate treatment in which a chromate film is formed by electrolysis in the chromate solution may be employed.
- the chromate solution used here it is possible to use those in the range used in a usual manner. After that, it is washed with water and dried to obtain a surface-treated copper foil having a grayed surface.
- the surface-treated copper foil provided with the grayed surface according to the present invention described above has a good gray color with a smoothing power against powder from the grayed surface.
- the grayed layer can be etched away by a normal copper etching process. Therefore, it is possible to easily process it into an arbitrary shape by using a process for manufacturing a printed wiring board. Considering these facts, it can be said that it is most suitable for the application of the electromagnetic wave shielding conductive mesh incorporated in the front panel of the plasma display panel.
- the surface-treated copper foil having a grayed surface according to the present invention is used for an electromagnetic wave shielding conductive mesh for a front panel of a plasma display panel, despite the fact that the cobalt sulfate plating layer is very thin. It has a good gray color to withstand. Since the cobalt content is low, the etching characteristics are good, and the solution life is prolonged without lowering the titer of the ordinary copper etching solution based on iron chloride and sulfuric acid. It becomes possible to meet.
- the method for producing a surface-treated copper foil according to the present invention can produce the above-mentioned surface-treated copper foil with high yield, and the cobalt sulfate plating layer formed by adopting the above-described production conditions is most suitable. It dissolves in the copper etchant at high efficiency.
- the first surface-treated copper foil la shown in FIG. 1 was manufactured, and an electromagnetic wave shielding conductive mesh shape was experimentally manufactured by an etching method to confirm the etching performance.
- a copper foil having a nominal thickness of 15 m obtained by electrolyzing a copper sulfate solution was used. Then, the copper foil was immersed in a dilute sulfuric acid solution having a sulfuric acid concentration of 150 gZl and a liquid temperature of 30 ° C. for 30 seconds to clean the surface.
- the glossy surface of the electrolytic copper foil having a nominal thickness of 15 m was subjected to a roughening treatment.
- the fine copper particles 3 are adhered and formed on one surface of the copper foil 7 and are copper sulfate based solutions having a concentration of 10 gZl copper, 100 gZl sulfuric acid, 25 ppm chlorine, 9 ppm Electrolysis conditions of a solution of luacridine 140 mg gZl, a liquid temperature of 38 ° C, a current density of 15 AZdm 2 , and an electrolysis time of 2 seconds were used.
- FIG. 10 shows the copper foil surface subjected to the roughening treatment.
- a cobalt sulfate plating layer was formed on the rough surface of the electrolytic copper foil as step a).
- the formation of the cobalt sulfate plating layer is performed by adjusting the current density of lAZdm 2 using a cobalt sulfate plating solution with a 20 g Zl cobalt sulfate (pH 7), a pH of 5.5, and a liquid temperature of 27 ° C as a stirring bath.
- a gray cobalt sulfate plating layer (equivalent thickness: 27 Omg / m 2 ) was formed.
- the concentration of the cobalt ion in the solution was particularly adjusted.
- FIG. 11 and FIG. 12 show the formed conoremet sulfate layer.
- FIG. 11 is a scanning electron microscope image observed at low magnification
- FIG. 12 is a scanning electron microscope image observed at high magnification.
- the rough surface shape of the underlying electrolytic copper foil can be clearly understood, and it can be understood that the graying treatment layer itself is extremely thin.
- step (b) pure water is sufficiently showered and washed, and is retained in a drying furnace at an atmospheric temperature of 150 ° C for 4 seconds from an electric heater to remove moisture and to obtain a very good color tone.
- a surface-treated copper foil la having a grayed surface was obtained.
- a washing step with pure water for 15 seconds is provided between each of the above-mentioned steps in principle to prevent the carry-in of the solution in the pretreatment step.
- the grayed surface of the obtained surface-treated copper foil is covered with an electromagnetic wave shielding mesh for a plasma display, and is subjected to a transparentizing process to determine whether or not the force appears to be blackened. I made a decision.
- the black density of the grayed surface before the formation of the transparent resin film was 0.9, and an epoxy resin was applied as a transparent resin film to this grayed surface, dried, cured, and cured. ⁇
- An alternative method of observing the changed color tone of the grayed surface through the resin layer was adopted. As a result, the grayed surface was observed as black with a black density of 1.5.
- a dry film serving as an etching resist was bonded to both surfaces of the surface-treated copper foil obtained as described above. Then, only the dry film on the grayed surface side is overlaid with a mask film for testing to prototype an electromagnetic wave shielding conductive mesh, the mesh pitch is 200 m, the mesh line width is 10 ⁇ m, and the mesh bias angle is 45 ° Then, a conductive mesh pattern having a mesh electrode portion on the periphery was exposed to ultraviolet light. At this time, the entire surface of the etching resist layer on the opposite side was also exposed to ultraviolet light so that it could not be removed by subsequent development. Thereafter, development was performed using an alkaline solution to form an etching pattern.
- FIG. 13 shows an etched state of a test pattern (13 m wide circuit) for evaluating the etching property. As can be seen from FIG. 13, a beautiful circuit having no etching residue and an extremely excellent etching factor is obtained.
- a second surface-treated copper foil lc provided with a zinc-nickel alloy layer as a protection layer was manufactured, and the electromagnetic wave shielding conductive mesh shape was tested by an etching method. And the etching performance was confirmed. Therefore, since the steps up to the formation of the graying treatment layer using the cobalt sulfate plating layer are the same as those in the first embodiment, only the conditions for the prevention treatment will be described.
- the converted thickness of the gray cobalt sulfate plating layer was 270 mgZ m (? Me.
- both sides of the copper foil on which the formation of the gray cobalt sulfate plating layer was completed on one side of Example 1 were plated using a zinc-nickel alloy plating solution, and a zinc-nickel alloy layer was formed on both sides. It was formed.
- the zinc-nickel alloy layer has a nickel concentration of 2.Og / l using nickel sulfate, a zinc concentration of 0.5g / l using zinc pyrophosphate, a potassium concentration of 250gZl, a liquid temperature of 35 ° C, pH10, Electrolysis was performed for 5 seconds under the condition of a current density of 5 AZdm 2 to uniformly and smoothly deposit on both surfaces.
- the grayed surface of the obtained surface-treated copper foil is covered with an electromagnetic wave shielding mesh for a plasma display, and is subjected to a transparentizing process to determine whether or not the force appears to be blackened. I made a decision.
- the black density of the grayed surface before the formation of the transparent resin film was 0.9, and as a result of evaluation using the same alternative method as in Example 1, the grayed surface had a black density of 1.6. Was observed.
- Example 2 In the same manner as in Example 1, an electromagnetic wave shielding conductive mesh was prototyped using the obtained surface-treated copper foil. As a result, very good etching was performed with no residual etching that hindered the etching operation even when the anti-reflection treatment layer was present.
- a second surface-treated copper foil le provided with a zinc-nickel alloy layer and a chromate treatment layer as a protection layer was manufactured, and the electromagnetic wave shielding conductive mesh shape was formed.
- the converted thickness of the gray cobalt sulfate plating layer is 270 mgZm 2 as in Example 1.
- Example 2 In the same manner as in Example 2, a zinc-nickel alloy plating solution was used to form a zinc-nickel alloy layer on both surfaces, and then a chromate treatment was performed on both surfaces.
- electrolytic chromate treatment was employed, and the electrolysis conditions were chromic acid 5. Og / U pH 11.5, liquid temperature 35 ° C, current density 8 AZdm 2 , and electrolysis time 5 seconds.
- the grayed surface of the obtained surface-treated copper foil is covered with an electromagnetic wave shielding mesh for a plasma display, and is subjected to a transparency treatment to determine whether or not it has a force that appears blackened. I made a decision.
- the black density of the grayed surface before the formation of the transparent resin film was 0.9, and as a result of evaluation using the same alternative method as in Example 1, the grayed surface had a black density of 1.5. Was observed.
- Example 2 In the same manner as in Example 1, an electromagnetic wave shielding conductive mesh was prototyped using the obtained surface-treated copper foil. As a result, very good etching was performed with no residual etching that hindered the etching operation even when the anti-reflection treatment layer was present.
- a second surface-treated copper foil lc provided with a zinc-cobalt alloy layer as a protection layer was manufactured, and the shape of the electromagnetic wave shielding conductive mesh was experimentally determined by an etching method. And the etching performance was confirmed. Therefore, since the steps up to the formation of the graying treatment layer using the cobalt sulfate plating layer are the same as those in the first embodiment, only the conditions for the prevention treatment will be described.
- the converted thickness of the gray cobalt sulfate plating layer is 270 mgZm 2 as in Example 1.
- a zinc-cobalt alloy layer is formed on both surfaces of the copper foil on which the formation of the gray cobalt sulfate layer has been completed on the glossy surface of Example 1 by using a zinc-cobalt alloy plating solution. It was done.
- Zinc-cobalt alloy layer is made of conorate sulfate with cobalt concentration of 2.Og / l, zinc pyrophosphate with zinc concentration of 0.5g / l, potassium pyrophosphate with 250gZl, liquid temperature of 35 ° C, pH10, Electrolyze for 5 seconds at a current density of 5 AZdm 2 for uniformity on both sides And it was made to deposit smoothly.
- the grayed surface of the obtained surface-treated copper foil is covered with an electromagnetic wave shielding mesh for a plasma display, and is subjected to a transparentizing process to determine whether or not it has a blackened force. I made a decision.
- the black density of the grayed surface before the formation of the transparent resin film was 0.93, and as a result of evaluation using the same alternative method as in Example 1, the grayed surface had a black density of 1.6. Was observed.
- Example 2 In the same manner as in Example 1, an electromagnetic wave shielding conductive mesh was prototyped using the obtained surface-treated copper foil. As a result, very good etching was performed with no residual etching that hindered the etching operation even when the anti-reflection treatment layer was present.
- Example 4 In the same manner as in Example 4, a zinc-cobalt alloy layer was formed on both surfaces using a zinc-conolate alloy plating solution, and then a chromate treatment was performed on both surfaces. .
- electrolytic chromate treatment was adopted, and the electrolysis conditions were chromic acid 5. Og / l, pH 11.5, liquid temperature 35 ° C, current density 8 AZdm 2 , and electrolysis time 5 seconds.
- the pure water is sufficiently showered and washed, and is retained in a drying furnace having an atmosphere temperature of 150 ° C for 4 seconds from an electric heater to remove moisture and to remove water.
- a surface-treated copper foil le having a grayed surface with a good color tone was always obtained.
- a washing step with pure water for 15 seconds is provided between each of the above-mentioned steps, in principle, to prevent carry-in of the solution in the pretreatment step.
- the gray-treated surface of the obtained surface-treated copper foil is covered with an electromagnetic wave shielding mesh for a plasma display, and is subjected to a transparency treatment to determine whether or not it has a force that appears black. I made a decision.
- the black density of the grayed surface before the formation of the transparent resin film was 0.9, and as a result of evaluation using the same alternative method as in Example 1, the grayed surface had a black density of 1.6. Was observed.
- Example 2 In the same manner as in Example 1, an electromagnetic wave shielding conductive mesh was prototyped using the obtained surface-treated copper foil. As a result, very good etching was performed with no residual etching that hindered the etching operation even when the anti-reflection treatment layer was present.
- the present example was performed without roughening the roughened surface of the electrolytic copper foil.
- a gray layer was formed on the roughened side of the electrolytic copper foil by a cobalt sulfate plating layer, and the second surface-treated copper foil lb shown in FIG. 2 was manufactured.
- the same evaluation as in Example 1 was performed. Was done. Therefore, the description of the steps will be the same as in Example 1, and will not be repeated here.
- the gray cobalt sulfate plating layer had a converted thickness of 268 mgZm 2 .
- the morphology of the formed cobalt sulfate plating layer is observed in the same manner as shown in FIGS.
- the grayed surface of the obtained surface-treated copper foil is covered with an electromagnetic shielding mesh for a plasma display, and is subjected to a transparentizing process to determine whether or not the force appears to be blackened. I made a decision.
- the black density of the grayed surface before the formation of the transparent resin film was 0.9, and as a result of evaluation using the same alternative method as in Example 1, the grayed surface had a black density of 1.6. Was observed.
- Example 2 In the same manner as in Example 1, an electromagnetic wave shielding conductive mesh was prototyped using the obtained surface-treated copper foil. As a result, very good etching was performed with no etching residue that hindered the etching operation.
- Example 6 the glossy surface of the electrolytic copper foil was not subjected to the roughening treatment, but the roughened surface was subjected to the graying treatment, and the first surface-treated copper foil lb shown in FIG. was manufactured and the shape of the electromagnetic wave shielding conductive mesh was experimentally manufactured by an etching method to confirm the etching performance.
- a copper foil having a nominal thickness of 15 m obtained by electrolyzing a copper sulfate solution was used. Then, the copper foil was immersed in a dilute sulfuric acid solution having a sulfuric acid concentration of 150 gZl and a liquid temperature of 30 ° C. for 30 seconds to clean the surface. [0097] Then, a cobalt sulfate plating layer was formed as a) step on the rough surface of the copper foil.
- step b sufficiently pure water is showered and washed, and is retained for 4 seconds in a drying oven at an atmospheric temperature of 150 ° C from an electric heater to remove moisture and to obtain a very good color tone. Lb of a surface-treated copper foil having a gray-treated surface was obtained.
- a washing step with pure water for 15 seconds is provided between each of the above-mentioned steps in principle to prevent the carry-in of the solution in the pretreatment step.
- the gray-treated surface of the obtained surface-treated copper foil was covered with an electromagnetic wave shielding mesh for a plasma display, and it was determined whether or not it had a blackened appearance when subjected to a transparency treatment. I made a decision.
- the black density of the grayed surface before the formation of the transparent resin film was 0.9, and as a result of evaluation using the same alternative method as in Example 1, the grayed surface had a black density of 1.6. Was observed.
- Example 6 the glossy surface of the electrolytic copper foil was not subjected to the roughening treatment, but the roughened surface was subjected to the graying treatment, and the first surface-treated copper foil lb shown in FIG. was manufactured and the shape of the electromagnetic wave shielding conductive mesh was experimentally manufactured by an etching method to confirm the etching performance.
- a copper foil having a nominal thickness of 15 m obtained by electrolyzing a copper sulfate solution was used. Then, the copper foil was immersed in a dilute sulfuric acid solution having a sulfuric acid concentration of 150 gZl and a liquid temperature of 30 ° C. for 30 seconds to clean the surface.
- a cobalt sulfate plating layer was formed on the rough surface of the copper foil as a) step.
- the concentration of cobalt ions in the solution was not adjusted. This is because it was considered that the adjustment of the metal ion concentration was unnecessary because of the short-time electrolysis.
- the morphology of the formed cobalt sulfate plating layer is observed as shown in FIGS.
- step b sufficiently pure water is showered and washed, and is retained in a drying furnace at an atmospheric temperature of 150 ° C for 4 seconds from an electric heater to remove moisture and to obtain a very good color tone. Lb of a surface-treated copper foil having a gray-treated surface was obtained.
- a washing step with pure water for 15 seconds is provided between each of the above-mentioned steps in principle to prevent the carry-in of the solution in the pretreatment step.
- the gray-treated surface of the obtained surface-treated copper foil was covered with an electromagnetic wave shielding mesh for a plasma display, and it was determined whether or not it had a force that appeared black when subjected to a transparency treatment. I made a decision.
- the black density of the grayed surface before the formation of the transparent resin film was 0.9, and as a result of evaluation using the same alternative method as in Example 1, the grayed surface had a black density of 1.5. Was observed.
- Example 2 In the same manner as in Example 1, an electromagnetic wave shielding conductive mesh was prototyped using the obtained surface-treated copper foil. As a result, very good etching was performed with no etching residue that hindered the etching operation.
- a second surface-treated copper foil Id provided with a zinc-conorate alloy layer as a protective layer was manufactured, and the electromagnetic wave shielding conductive mesh shape was etched by an etching method. It was manufactured experimentally and its etching performance was confirmed. Therefore, since the steps up to the formation of the graying treatment layer by the cobalt sulfate plating layer are the same as those in Example 7, only the protection treatment conditions will be described.
- the converted thickness of the gray cobalt sulfate plating layer was 268 mgZ m (? Me.
- Example 7 On both sides of the copper foil on which the formation of the gray cobalt sulfate plating layer was completed on one side of Example 7, a zinc-conoleto alloy layer was formed on both sides under the same conditions as in Example 4. . Then, pure water was sufficiently showered and washed in the same manner as in Example 1, and retained in a drying furnace with an atmosphere temperature of 150 ° C. for 4 seconds from an electric heater to remove moisture and obtain a very good color tone. A surface-treated copper foil Id having a grayed surface was obtained. In principle, a washing step with pure water for 15 seconds is provided between each of the above-mentioned steps to prevent carry-in of the solution in the pretreatment step.
- Example 2 In the same manner as in Example 1, an electromagnetic wave shielding conductive mesh was prototyped using the obtained surface-treated copper foil. As a result, very good etching was performed with no etching residue that hindered the etching operation.
- a second surface-treated copper foil If provided with a zinc-cobalt alloy layer and a chromate treatment layer as a protection layer was manufactured, and the electromagnetic wave shielding conductive mesh was formed.
- the steps up to the formation of the graying treatment layer by the cobalt sulfate plating layer are the same as those in the seventh embodiment, only the conditions for the prevention treatment will be described.
- the converted thickness of the gray cobalt sulfate plating layer is 270 mgZm 2 as in Example 7.
- Example 4 In the same manner as in Example 4, a zinc-cobalt alloy layer was formed on both surfaces using a zinc-conorate alloy plating solution, and then the same chromate treatment as in Example 5 was performed on both surfaces. He did it.
- the pure water is sufficiently showered and washed, and is retained in a drying furnace at an atmospheric temperature of 150 ° C for 4 seconds from an electric heater to remove moisture, and A surface-treated copper foil If provided with a grayed surface having a good color tone was always obtained.
- a washing step with pure water for 15 seconds is provided between each of the above-mentioned steps, in principle, to prevent carry-in of the solution in the pretreatment step.
- the grayed surface of the obtained surface-treated copper foil was covered with an electromagnetic wave shielding mesh for a plasma display, and it was determined whether or not it had a force that appeared black when subjected to a transparency treatment. I made a decision.
- the black density of the grayed surface before the formation of the transparent resin film was 0.9, and as a result of evaluation using the same alternative method as in Example 1, the grayed surface had a black density of 1.6. Was observed.
- Example 2 In the same manner as in Example 1, an electromagnetic wave shielding conductive mesh was prototyped using the obtained surface-treated copper foil. As a result, very good etching was performed with no residual etching that hindered the etching operation even when the anti-reflection treatment layer was present.
- the surface-treated copper foil having the grayed surface according to the present invention can be prepared by using a normal copper etching solution, without any color unevenness of the grayed surface, no powder falling off the surface, and no rubbing force. It is possible to form a high-quality black mask without color unevenness by using it for an electromagnetic wave shielding conductive mesh on the front panel of a plasma display panel. Further, if it can be supplied as a surface-treated copper foil having a gray-treated surface, it is possible to omit the blackening process in the front panel manufacturing process. Furthermore, the surface-treated copper foil having this grayed surface can adopt the conventional copper foil surface treatment process by adopting the above-described manufacturing method, and does not require new manufacturing equipment. . Therefore, a high-quality product without color unevenness can be manufactured with high yield, so that the production cost can be reduced.
- FIG. 1 is a diagram schematically showing a cross-sectional layer configuration of a surface-treated copper foil having a grayed surface.
- FIG. 2 is a diagram schematically illustrating a cross-sectional layer configuration of a surface-treated copper foil having a grayed surface.
- FIG. 3 is an FIB observation image of a cross-sectional layer configuration of a surface-treated copper foil having a grayed surface.
- FIG. 4 is an FIB observation image of a cross-sectional layer configuration of a surface-treated copper foil having a grayed surface.
- FIG. 5 is a FIB observation image of a cross-sectional layer configuration of a surface-treated copper foil having a grayed surface.
- FIG. 9 is a diagram schematically illustrating a cross-sectional layer configuration of a surface-treated copper foil having a graying-treated surface.
- FIG. 13 is a scanning electron microscope image of an etching test pattern.
- FIG. 14 is a schematic diagram showing a manufacturing flow of a front panel of a conventional plasma display panel.
- FIG. 15 is a schematic diagram showing a manufacturing flow of a front panel of a conventional plasma display panel.
- FIG. 16 is a front panel of a conventional plasma display panel. Schematic diagram showing the manufacturing flow of
Abstract
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KR101065758B1 (ko) * | 2003-02-27 | 2011-09-19 | 후루카와 덴키 고교 가부시키가이샤 | 전자파 실드용 동박, 그 제조방법 및 전자파 실드체 |
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2004
- 2004-03-02 JP JP2004057179A patent/JP4458521B2/ja not_active Expired - Fee Related
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2005
- 2005-03-01 CN CN2005800064619A patent/CN1934293B/zh not_active Expired - Fee Related
- 2005-03-01 WO PCT/JP2005/003386 patent/WO2005083157A1/ja active Application Filing
- 2005-03-01 KR KR1020067017514A patent/KR100869196B1/ko active IP Right Grant
- 2005-03-02 TW TW094106234A patent/TWI280079B/zh not_active IP Right Cessation
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008100104A1 (en) * | 2007-02-16 | 2008-08-21 | Dongjin Semichem Co., Ltd | Filter for shielding electromagnetic interference and display device provided with the same |
CN101606447B (zh) * | 2007-02-16 | 2012-07-04 | 株式会社东进世美肯 | 用于屏蔽电磁干扰的过滤器及设置该过滤器的显示器 |
CN102812792A (zh) * | 2010-03-30 | 2012-12-05 | Jx日矿日石金属株式会社 | 电磁波屏蔽用复合体 |
CN102812792B (zh) * | 2010-03-30 | 2015-06-24 | Jx日矿日石金属株式会社 | 电磁波屏蔽用复合体 |
CN105109260A (zh) * | 2015-07-31 | 2015-12-02 | 广东欧珀移动通信有限公司 | 压铸铝合金外观表面处理方法及手机外壳 |
CN105109260B (zh) * | 2015-07-31 | 2018-01-19 | 广东欧珀移动通信有限公司 | 压铸铝合金外观表面处理方法及手机外壳 |
Also Published As
Publication number | Publication date |
---|---|
CN1934293B (zh) | 2010-04-21 |
JP4458521B2 (ja) | 2010-04-28 |
CN1934293A (zh) | 2007-03-21 |
TW200533251A (en) | 2005-10-01 |
TWI280079B (en) | 2007-04-21 |
KR100869196B1 (ko) | 2008-11-18 |
KR20070004658A (ko) | 2007-01-09 |
JP2005248221A (ja) | 2005-09-15 |
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