WO2012169249A1 - 液晶ポリマー銅張積層板及び当該積層板に用いる銅箔 - Google Patents
液晶ポリマー銅張積層板及び当該積層板に用いる銅箔 Download PDFInfo
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- WO2012169249A1 WO2012169249A1 PCT/JP2012/056318 JP2012056318W WO2012169249A1 WO 2012169249 A1 WO2012169249 A1 WO 2012169249A1 JP 2012056318 W JP2012056318 W JP 2012056318W WO 2012169249 A1 WO2012169249 A1 WO 2012169249A1
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- copper
- copper foil
- liquid crystal
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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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
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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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0274—Optical details, e.g. printed circuits comprising integral optical 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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- 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
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/38—Chromatising
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/58—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of copper
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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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
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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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
-
- 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
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0141—Liquid crystal polymer [LCP]
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12049—Nonmetal component
Definitions
- the present invention relates to a liquid crystal polymer copper clad laminate, and more particularly to a liquid crystal polymer copper clad laminate for a high frequency printed wiring board. Moreover, this invention relates to the copper foil used for the said liquid crystal polymer copper clad laminated board.
- Copper and copper alloy foils have greatly contributed to the development of electrical and electronic industries, and are indispensable particularly as printed circuit materials.
- Copper foil for printed wiring boards is generally used to produce a copper-clad laminate by laminating and bonding to a base material such as a synthetic resin board or film via an adhesive or under high temperature and high pressure without using an adhesive.
- a necessary circuit is printed through a resist coating and exposure process, and then an etching process for removing unnecessary portions is performed.
- the required elements are soldered to form various printed circuit boards for electronic devices.
- the copper foil for printed wiring boards differs in the surface (roughening surface) adhere
- the requirements for the roughened surface formed on the copper foil are as follows: 1) No oxidation discoloration during storage, 2) High peel strength with substrate, high temperature heating, wet processing, soldering, chemicals It is sufficient even after treatment or the like, and 3) there is no so-called etching residue generated after lamination with the substrate and etching.
- the present applicant formed a cobalt plating layer or a cobalt-nickel alloy plating layer on the surface of the copper foil and then formed a cobalt plating layer or a cobalt-nickel alloy plating layer as a printed circuit copper foil.
- a copper foil treatment method having excellent oxidation resistance without lowering the heat-resistant peel strength when an acrylic adhesive is used, as well as having the above-mentioned general characteristics ( Patent Document 1).
- rust prevention represented by chromium oxide single coating treatment or mixed coating treatment of chromium oxide and zinc and / or zinc oxide. Processing is performed.
- Patent Document 3 describes a copper foil for a high-frequency printed wiring board in which a copper-clad laminate in which a liquid crystal polymer film and a copper foil are laminated and a fine pattern can be formed thereon.
- an object of the present invention is to provide a copper-clad laminate in which a roughened copper foil made of copper-cobalt-nickel alloy plating and a liquid crystal polymer are bonded together, while having excellent peel strength and a copper foil circuit. It is to provide a copper clad laminate having no roughened particle residue on the liquid crystal polymer resin surface after etching. Moreover, the subject of this invention is providing the copper foil suitable for manufacture of such a copper clad laminated board.
- the present invention provides the following inventions.
- a copper clad laminate in which a copper foil and a liquid crystal polymer are bonded to each other, the copper foil having an adhesive surface with a liquid crystal polymer, a primary particle layer of copper, and copper, cobalt on the primary particle layer And a secondary particle layer made of a ternary alloy made of nickel, the average particle size of the primary particle layer is 0.25 to 0.45 ⁇ m, and the average particle size of the secondary particle layer is A copper clad laminate having a thickness of 0.05 to 0.25 ⁇ m.
- a copper foil for a circuit can be provided.
- the cobalt-nickel alloy plating layer may have a cobalt adhesion amount of 200 to 3000 ⁇ g / dm 2 and a cobalt ratio of 60 to 66 mass%.
- the zinc-nickel alloy plating layer has a total amount in the range of 150 to 500 ⁇ g / dm 2 , a nickel amount in the range of 50 ⁇ g / dm 2 or more, and a nickel ratio in the range of 0.16 to 0.40.
- -A nickel alloy plating layer can be formed.
- a rust-proofing layer can be formed on the zinc-nickel alloy plating layer.
- the independent film processing of chromium oxide or the mixed film processing layer of chromium oxide, zinc, and / or zinc oxide can be formed, for example.
- a silane coupling layer can be formed on the mixed film treatment layer.
- the copper-clad laminate according to the present invention has excellent peel strength with a liquid crystal polymer (LCP), and can have the characteristics that no coarse particle residue is generated on the liquid crystal polymer surface after circuit etching.
- LCP liquid crystal polymer
- FIG. It is the microscope picture of the surface at the time of performing the roughening process which consists of copper-cobalt-nickel alloy plating on the conventional copper foil.
- a primary particle layer is previously formed on a copper foil, and a secondary particle layer made of copper-cobalt-nickel alloy plating is formed on the primary particle layer. It is a microscope picture of a layer. According to the present invention, a primary particle layer is previously formed on a copper foil, and a secondary particle layer made of copper-cobalt-nickel alloy plating is formed on the primary particle layer. It is the microscope picture of the surface at the time of improving the roughness further by the layer.
- the copper foil used in the present invention may be either an electrolytic copper foil or a rolled copper foil.
- the surface of the copper foil that adheres to the resin base material that is, the roughened surface, has a “fisture” on the surface of the copper foil after degreasing for the purpose of improving the peel strength of the copper foil after lamination.
- a roughening treatment is performed to perform electrodeposition.
- the electrolytic copper foil has irregularities at the time of manufacture, the irregularities are further increased by enhancing the convex portions of the electrolytic copper foil by roughening treatment.
- the processing contents may be somewhat different between rolled copper foil and electrolytic copper foil.
- a known treatment related to copper foil roughening is included as necessary, and is referred to as “roughening treatment”.
- This roughening treatment is to be performed by copper-cobalt-nickel alloy plating (in the following explanation, the roughening treatment of copper-cobalt-nickel alloy plating is performed to clarify the difference from the previous step. Is called “secondary particle layer”), as described above, simply forming a copper-cobalt-nickel alloy plating layer on the copper foil causes problems such as etching residues on the liquid crystal polymer surface. Will occur.
- FIG. 3 A micrograph of the surface of the copper foil in which a copper-cobalt-nickel alloy plating layer is formed on the copper foil is shown in FIG. As shown in FIG. 3, fine particles developed in a dendritic shape can be seen. In general, the fine particles developed in a dendritic shape shown in FIG. 3 are produced at a high current density.
- FIG. 1 is a conceptual explanatory diagram showing the cause of the etching residue when the copper-cobalt-nickel alloy plating layer as shown in FIG. 3 is formed.
- fine particles are formed in a dendritic shape on the copper foil, but the dendritic particles tend to be broken by an external force and fall off from the root, so that they tend to remain after etching.
- the fine dendritic particles cause peeling due to “rubbing” during the treatment and soiling of the roll due to the peeling powder.
- a primary particle layer of copper is formed in advance on the surface of the copper foil, and then a secondary particle layer composed of a ternary alloy composed of copper, cobalt and nickel is formed on the primary particle layer.
- a secondary particle layer composed of a ternary alloy composed of copper, cobalt and nickel is formed on the primary particle layer.
- the high frequency generally refers to 1 GHz or more, and is typically 5 to 30 GHz.
- the average particle size of the primary particle layer is 0.25 to 0.45 ⁇ m
- the average particle size of the secondary particle layer made of a ternary alloy composed of copper, cobalt and nickel is 0.05 to 0.25 ⁇ m. As is clear from the examples shown below, this is the optimum condition for preventing etching residues.
- the primary particle layer and the secondary particle layer can be formed by an electroplating layer.
- the secondary particles are characterized by one or more dendritic particles grown on the primary particles.
- the average particle size of the secondary particle layer is as small as 0.05 to 0.25 ⁇ m, but this particle size can also be referred to as the particle height. That is, it can be said that one of the features of the present invention is that the height of the secondary particles is suppressed, and the separation (powder falling) of the particles causing the generation of etching residues is suppressed. On the other hand, in the present invention, an excellent peel strength can be secured by adopting a double structure of a primary particle layer and a secondary particle layer.
- the copper foil having the primary particle layer and the secondary particle layer thus formed can achieve an adhesive strength of 0.60 kg / cm or more with the liquid crystal polymer.
- Rz when the roughness of the surface on which the primary particle layer and the secondary particle layer are formed is observed, Rz can be 1.5 ⁇ m or less, and further Rz can be 1.0 ⁇ m or less. Lowering the surface roughness is more effective for suppressing etching residues.
- this plating condition is merely a suitable example, and the secondary particles are formed on the primary particles, and the average particle diameter plays a role in preventing powder falling. is there. Therefore, as long as the average particle diameter falls within the range of the present invention, the plating conditions other than those indicated below are not disturbed.
- the present invention includes these.
- Liquid composition Copper 10-20 g / L, Nickel 5-15 g / L, Cobalt 5-15 g / L pH: 2-3
- Liquid temperature 30-50 ° C
- Current density 24 to 50 A / dm 2
- Coulomb amount 34 to 48 As / dm 2
- a heat-resistant layer can be further formed on the secondary particle layer.
- the plating conditions are shown below.
- Liquid composition Nickel 5-20 g / L, Cobalt 1-8 g / L pH: 2-3
- the following heat-resistant layer can be further formed on the secondary particle layer.
- the plating conditions are shown below.
- Liquid composition Nickel 2-30 g / L, Zinc 2-30 g / L pH: 3-4
- plating conditions for forming a rust prevention layer In the present invention, the following rust preventive layer can be further formed.
- the plating conditions are shown below. In the following, conditions for the immersion chromate treatment are shown, but electrolytic chromate treatment may be used.
- Liquid composition potassium dichromate 1-10 g / L, zinc 0-5 g / L pH: 3-4
- Coulomb amount 0 to 2 As / dm 2 (for immersion chromate treatment)
- a silane coupling treatment in which a silane coupling agent is applied to at least the roughened surface on the rust preventive layer can be performed.
- the silane coupling agent include olefin silanes, epoxy silanes, acrylic silanes, amino silanes, and mercapto silanes, which can be appropriately selected and used.
- the application method may be any of spraying a silane coupling agent solution, coating with a coater, dipping, pouring and the like. Since these are already known techniques (see, for example, Japanese Patent Publication No. 60-15654), details are omitted.
- Copper as the secondary particles - cobalt - nickel alloy plating, by electrolytic plating, coating weight of 10 ⁇ 30mg / dm 2 of copper -100 ⁇ 3000 ⁇ g / dm 2 of cobalt -50 ⁇ 500 ⁇ g / dm 2 3 ternary alloy of nickel A layer can be formed.
- the amount of Cu adhesion is less than 10 mg / dm 2, it is difficult to form sufficiently large roughened particles, and the substrate adhesion tends to deteriorate. If the Cu adhesion amount exceeds 30 mg / dm 2 , the heat resistance and chemical resistance in the substrate characteristics tend to deteriorate.
- the amount of deposited Co is less than 100 ⁇ g / dm 2 , the etching property is deteriorated. If the amount of Co adhesion exceeds 3000 ⁇ g / dm 2 , it is not preferable when the influence of magnetism must be taken into account, and deterioration of acid resistance and chemical resistance can be considered.
- Ni adhesion amount When the Ni adhesion amount is less than 50 ⁇ g / dm 2 , the heat resistance deteriorates. On the other hand, when the Ni adhesion amount exceeds 500 ⁇ g / dm 2 , the etching property is lowered. That is, although it is not at a level where etching remains and etching cannot be performed, it becomes difficult to form a fine pattern.
- Preferred Co deposition amount is 500 ⁇ 2000 ⁇ g / dm 2, and preferably nickel coating weight is 50 ⁇ 300 ⁇ g / dm 2.
- copper - cobalt - deposition of nickel alloy plating it may be desirable is 10 ⁇ 30mg / dm 2 of copper -100 ⁇ 3000 ⁇ g / dm 2 of cobalt -50 ⁇ 500 ⁇ g / dm 2 of nickel.
- Each adhesion amount of the ternary alloy layer is a desirable condition, and a range exceeding this amount is not denied.
- an alkaline etching solution and a copper chloride based etching solution as described in the following examples are used.
- this etching solution and etching conditions are versatile, it should be understood that they are not limited to these conditions and can be arbitrarily selected.
- the cobalt-nickel alloy plating layer preferably has a cobalt adhesion amount of 200 to 3000 ⁇ g / dm 2 and a cobalt ratio of 60 to 66 mass%.
- This treatment can be regarded as a kind of rust prevention treatment in a broad sense.
- This cobalt-nickel alloy plating layer needs to be performed to such an extent that the adhesive strength between the copper foil and the substrate is not substantially lowered.
- a cobalt adhesion amount of less than 200 ⁇ g / dm 2 is not preferable because the heat-resistant peel strength is lowered, the oxidation resistance and chemical resistance are deteriorated, and the treated surface becomes reddish.
- cobalt adhesion amount exceeds 3000 ⁇ g / dm 2 , it is not preferable when the influence of magnetism must be taken into account, and deterioration of acid resistance and chemical resistance is considered.
- a preferable cobalt adhesion amount is 400 to 2500 ⁇ g / dm 2 .
- a zinc-nickel alloy plating layer can be further formed on the cobalt-nickel alloy plating.
- the total amount of the zinc-nickel alloy plating layer is 150 to 500 ⁇ g / dm 2 , and the nickel ratio is 16 to 40% by mass. This has a role of a heat-resistant rust-proof layer.
- This condition is also a preferable condition, and other known zinc-nickel alloy plating can be used. It will be understood that this zinc-nickel alloy plating is a preferred additional condition in the present invention.
- the heat and rust prevention ability is lowered and it becomes difficult to play a role as a heat and rust prevention layer, and if the total amount exceeds 500 ⁇ g / dm 2 The hydrochloric acid resistance tends to deteriorate.
- a cobalt-nickel alloy plating layer and further a zinc-nickel alloy plating layer can be sequentially formed on the copper-cobalt-nickel alloy plating layer as the secondary particle layer as necessary. it can.
- the total amount of cobalt and nickel deposited in these layers can also be adjusted. It is desirable that the total deposition amount of cobalt is 300 to 4000 ⁇ g / dm 2 and the total deposition amount of nickel is 150 to 1500 ⁇ g / dm 2 .
- the total deposition amount of cobalt is less than 300 ⁇ g / dm 2 , the heat resistance and chemical resistance are lowered, and when the total deposition amount of cobalt exceeds 4000 ⁇ g / dm 2 , etching spots may occur. Moreover, if the total adhesion amount of nickel is less than 150 ⁇ g / dm 2 , heat resistance and chemical resistance are lowered. When the total adhesion amount of nickel exceeds 1500 ⁇ g / dm 2 , an etching residue is generated.
- the total deposit of cobalt is 1500-3500 ⁇ g / dm 2 and the total deposit of nickel is 500-1000 ⁇ g / dm 2 . If the above conditions are satisfied, the conditions described in this paragraph need not be particularly limited.
- a preferable antirust treatment is a coating treatment of chromium oxide alone or a mixture coating treatment of chromium oxide and zinc / zinc oxide.
- Chromium oxide and zinc / zinc oxide mixture film treatment is a method of forming zinc or zinc oxide comprising zinc oxide and chromium oxide by electroplating using a plating bath containing zinc salt or zinc oxide and chromate. It is the process which coat
- the copper foil thus obtained has excellent peel strength with the liquid crystal polymer, and has oxidation resistance and hydrochloric acid resistance on the surface of the liquid crystal polymer after the circuit etching treatment.
- a printed circuit having a pitch of 150 ⁇ m or less can be etched with a CuCl 2 etching solution, and alkali etching can be performed.
- silane treatment for applying a silane coupling agent to at least the roughened surface on the rust preventive layer is performed for the main purpose of improving the adhesive force between the copper foil and the liquid crystal polymer.
- silane coupling agent used for the silane treatment include olefin silane, epoxy silane, acrylic silane, amino silane, and mercapto silane, which can be appropriately selected and used. .
- Application method may be any of spraying a silane coupling agent solution by spraying, coating with a coater, dipping, pouring and the like.
- Japanese Patent Publication No. 60-15654 describes that the adhesion between a copper foil and a resin substrate is improved by subjecting the rough surface of the copper foil to a chromate treatment followed by a silane coupling agent treatment. . Refer to this for details. Thereafter, if necessary, an annealing treatment may be performed for the purpose of improving the ductility of the copper foil.
- Example 1 to Example 9 A primary particle layer (Cu) and a secondary particle layer (copper-cobalt-nickel alloy plating) were formed on a rolled copper foil having a thickness of 12 ⁇ m within the following condition range.
- the bath composition and plating conditions used are as follows. [Bath composition and plating conditions]
- Examples 8 and 9 a heat-resistant layer 1, a heat-resistant layer 2, a rust-proof layer, and a weather-resistant layer were further formed on the roughened surface of the copper foil that had been subjected to the roughening treatment in the following procedure.
- Heat-resistant layer 1 The heat-resistant layer 1 was formed on the roughened surface of the copper foil subjected to the roughening treatment.
- the conditions for forming the heat-resistant layer 1 are shown below.
- Liquid composition Nickel 5-20 g / L, Cobalt 1-8 g / L pH: 2-3
- Heat-resistant layer 2 A heat-resistant layer 2 was formed on the copper foil provided with the heat-resistant layer 1.
- the conditions for forming the heat-resistant layer 2 are shown below.
- Liquid composition Nickel 2-30 g / L, Zinc 2-30 g / L pH: 3-4
- Liquid temperature 30-50 ° C
- Current density 1 to 2 A / dm 2
- Coulomb amount 1 to 2 As / dm 2
- Rust-proof layer On the copper foil which gave the said heat-resistant layers 1 and 2, the rust-proof layer was further formed. The conditions for forming the rust preventive layer are shown below.
- Table 1 shows the results of the diameter, peel strength, roughness (Rz), and presence / absence of residues of roughened particles.
- the sample for peel strength evaluation was an Example, a comparative example of a 12 ⁇ m thick copper foil and a 25 ⁇ m thick Kuraray liquid crystal polymer film (VECSTAR CT-25N) bonded together with a hot press to prepare a copper clad laminate, Circuit etching was performed and peel evaluation was performed.
- the peel strength was evaluated by a method in which a 3 mm-wide linear circuit was formed by the above-described circuit etching treatment and peeled away from the liquid crystal polymer film in a 90 ° direction.
- the average diameter of the primary particles was determined by observing the surface of the roughened surface of the sample subjected to the roughening treatment on the copper foil with an electron microscope (S4700, manufactured by Hitachi High-Technologies Corporation) at a magnification of 30000 times. Was used to measure the average particle size. Specifically, on the microscopic image, four measurement lines were drawn vertically and horizontally at locations where grain boundaries were clear and easy to measure, and the average particle diameter was measured from the number of particles intersecting the measurement line.
- the plating conditions for the first stage core particle formation and the electroplating for the second stage core particle growth are electroplating conditions for forming the first stage nucleating particles
- the second plating conditions are electroplating conditions for growing the second stage nucleating particles.
- the average particle size of the primary particles is 0.25 ⁇ m
- the average particle size of the secondary particles is 0.05 ⁇ m
- the normal peel strength is as high as 0.62 kg / cm
- the surface roughness Rz is 0.98 ⁇ m. It was characterized by no discoloration due to the residue of roughened particles after circuit etching.
- Example 4 the current density for forming the primary particles is 55 A / dm 2 and 3 A / dm 2 , and the coulomb amounts are 77 As / dm 2 and 12 As / dm 2. This is a case where 24 A / dm 2 and the coulomb amount are 34 As / dm 2 .
- the average particle diameter of primary particles is 0.35 ⁇ m
- the average particle diameter of secondary particles is 0.05 ⁇ m
- the normal peel strength is as high as 0.65 kg / cm
- the surface roughness Rz is 1.20 ⁇ m.
- after circuit etching it was characterized by no discoloration due to the residue of roughened particles.
- Example 5 the current density for forming the primary particles is 55 A / dm 2 and 3 A / dm 2 , and the coulomb amounts are 77 As / dm 2 and 12 As / dm 2. This is a case where 28 A / dm 2 is set and the coulomb amount is 39 As / dm 2 .
- the average particle diameter of the primary particles is 0.35 ⁇ m
- the average particle diameter of the secondary particles is 0.15 ⁇ m
- the normal peel strength is as high as 0.66 kg / cm
- the surface roughness Rz is 1.20 ⁇ m.
- after circuit etching it was characterized by no discoloration due to the residue of roughened particles.
- Example 7 the current density for forming the primary particles is 58 A / dm 2 and 4 A / dm 2 , and the coulomb amounts are 81 As / dm 2 and 16 As / dm 2. This is a case where 24 A / dm 2 and the coulomb amount are 34 As / dm 2 .
- the average primary particle diameter is 0.45 ⁇ m
- the secondary particle average particle diameter is 0.05 ⁇ m
- the normal peel strength is as high as 0.66 kg / cm
- the surface roughness Rz is 1.21 ⁇ m.
- after circuit etching it was characterized by no discoloration due to the residue of roughened particles.
- the comparative example has the following results.
- the current density for forming the primary particles is 47 A / dm 2 and 1 A / dm 2
- the coulomb amounts are 66 As / dm 2 and 4 As / dm 2.
- 24 A / dm 2 and the coulomb amount are 34 As / dm 2 .
- the average particle diameter of the primary particles was 0.15 ⁇ m
- the average particle diameter of the secondary particles was 0.05 ⁇ m.
- the normal peel strength was as low as 0.49 kg / cm
- the surface roughness Rz was as low as 0.87 ⁇ m.
- the current density for forming primary particles is 47 A / dm 2 and 1 A / dm 2
- the coulomb amounts are 66 As / dm 2 and 4 As / dm 2.
- 28 A / dm 2 is set and the coulomb amount is 39 As / dm 2 .
- the average particle size of the primary particles was 0.15 ⁇ m
- the average particle size of the secondary particles was 0.15 ⁇ m
- the current density for forming the primary particles is 47 A / dm 2 and 1 A / dm 2
- the coulomb amounts are 66 As / dm 2 and 4 As / dm 2.
- 31 A / dm 2 and the coulomb amount are 44 As / dm 2 .
- the average particle diameter of the primary particles was 0.15 ⁇ m
- the average particle diameter of the secondary particles was 0.25 ⁇ m.
- the normal peel strength was as low as 0.51 kg / cm, and the surface roughness Rz was 0.90 ⁇ m. A black discoloration due to the residue of roughened particles was observed after circuit etching, which was defective.
- the current density for forming primary particles is 47 A / dm 2 and 1 A / dm 2
- the coulomb amounts are 66 As / dm 2 and 4 As / dm 2.
- 34 A / dm 2 and the coulomb amount are 48 As / dm 2 .
- the average particle diameter of the primary particles was 0.15 ⁇ m
- the average particle diameter of the secondary particles was as large as 0.35 ⁇ m.
- the normal peel strength was as low as 0.52 kg / cm, and the surface roughness Rz was 0.91 ⁇ m. A black discoloration due to the residue of roughened particles was observed after circuit etching, which was defective.
- the current density for forming the primary particles is 51 A / dm 2 and 2 A / dm 2
- the coulomb amounts are 72 As / dm 2 and 8 As / dm 2.
- 34 A / dm 2 and the coulomb amount are 48 As / dm 2 .
- the average particle diameter of the primary particles was 0.25 ⁇ m
- the average particle diameter of the secondary particles was as large as 0.35 ⁇ m.
- the normal peel strength was 0.64 kg / cm, which was an example level, and the surface roughness Rz was 1.15 ⁇ m.
- black discoloration due to the residue of roughened particles was observed after circuit etching, which was defective.
- the current density for forming the primary particles is 55 A / dm 2 and 3 A / dm 2 , and the coulomb amounts are 77 As / dm 2 and 12 As / dm 2. This is a case where 34 A / dm 2 and the coulomb amount are 48 As / dm 2 .
- the average particle diameter of the primary particles was 0.35 ⁇ m, and the average particle diameter of the secondary particles was as large as 0.35 ⁇ m.
- the normal peel strength was 0.66 kg / cm, which was an example level, and the surface roughness Rz was 1.50 ⁇ m. A black discoloration due to the residue of roughened particles was observed after circuit etching, which was defective.
- the current density for forming the primary particles is 58 A / dm 2 and 4 A / dm 2
- the coulomb amounts are 81 As / dm 2 and 16 As / dm 2.
- 34 A / dm 2 and the coulomb amount are 48 As / dm 2 .
- the average particle diameter of the primary particles was 0.45 ⁇ m
- the average particle diameter of the secondary particles was as large as 0.35 ⁇ m.
- the normal peel strength was 0.66 kg / cm, which was an example level, but the surface roughness Rz was further increased to 1.55 ⁇ m. A black discoloration due to the residue of roughened particles was observed after circuit etching, which was defective.
- the copper-clad laminate of the present invention has a high peel strength with the liquid crystal polymer and an excellent effect that there is no residue of roughened particles on the resin surface after circuit etching. It can be seen that
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Abstract
Description
(1)銅箔と液晶ポリマーを貼り合わせた銅張積層板であって、当該銅箔は液晶ポリマーとの接着面に、銅の一次粒子層と、該一次粒子層の上に、銅、コバルト及びニッケルからなる3元系合金からなる二次粒子層とが形成されており、該一次粒子層の平均粒子径が0.25-0.45μmであり、該二次粒子層の平均粒子径が0.05-0.25μmである銅張積層板。
(2)前記一次粒子層及び二次粒子層が、電気めっき層である(1)に記載の銅張積層板。
(3)二次粒子が、前記一次粒子の上に成長した1又は複数個の樹枝状の粒子である(1)又は(2)に記載の銅張積層板。
(4)液晶ポリマーとの接着強度が0.60kg/cm以上である(1)~(3)のいずれか一項に記載の銅張積層板。
(5)銅箔の液晶ポリマーとの貼り合わせ面の粗さRzが1.5μm以下である(1)~(4)のいずれか一項に記載の銅張積層板。
(6)銅箔の液晶ポリマーとの貼り合わせ面の粗さRzが1.0μm以下である(1)~(5)のいずれか一項に記載の銅張積層板。
(7)高周波プリント配線板用である(1)~(6)のいずれか一項に記載の銅張積層板。
(8)液晶ポリマーと貼り合わせるための銅箔であって、当該銅箔は液晶ポリマーとの貼り合わせ面に、銅の一次粒子層と、該一次粒子層の上に、銅、コバルト及びニッケルからなる3元系合金からなる二次粒子層とが形成されており、該一次粒子層の平均粒子径が0.25-0.45μmであり、該二次粒子層の平均粒子径が0.05-0.25μmである銅箔。
(9)前記一次粒子層及び二次粒子層が、電気めっき層である(8)に記載の銅箔。
(10)液晶ポリマーとの接着強度が0.60kg/cm以上である(8)又は(9)に記載の銅箔。
(11)液晶ポリマーとの貼り合わせ面の粗さRzが1.5μm以下である(8)~(10)のいずれか一項に記載の銅箔。
(12)液晶ポリマーとの貼り合わせ面の粗さRzが1.0μm以下である(8)~(10)のいずれか一項に記載の銅箔。
銅の一次粒子のめっき条件の一例を挙げると、下記の通りである。なお、このめっき条件はあくまで好適な例を示すものであり、銅の一次粒子は銅箔上に形成される平均粒子径が主にエッチング残渣の原因となる粉落ち防止の役割を担うものである。したがって、平均粒子径が本発明の範囲に入るものであれば、下記に表示する以外のめっき条件であることは何ら妨げるものではない。本発明はこれらを包含するものである。
液組成 :銅10~20g/L、硫酸50~100g/L
液温 :25~50℃
電流密度 :1~58A/dm2
クーロン量:4~81As/dm2
なお、上記と同様に、このめっき条件はあくまで好適な例を示すものであり、二次粒子は一次粒子の上に形成されるものであり、平均粒子径が粉落ち防止の役割を担うものである。したがって、平均粒子径が本発明の範囲に入るものであれば、下記に表示する以外のめっき条件であることは何ら妨げるものではない。本発明はこれらを包含するものである。
液組成 :銅10~20g/L、ニッケル5~15g/L、コバルト5~15g/L
pH :2~3
液温 :30~50℃
電流密度 :24~50A/dm2
クーロン量:34~48As/dm2
本発明では、上記二次粒子層の上に、さらに耐熱層を形成することができる。このめっき条件を下記に示す。
液組成 :ニッケル5~20g/L、コバルト1~8g/L
pH :2~3
液温 :40~60℃
電流密度 :5~20A/dm2
クーロン量:10~20As/dm2
本発明では、上記二次粒子層の上に、さらに次の耐熱層を形成することができる。このめっき条件を下記に示す。
液組成 :ニッケル2~30g/L、亜鉛2~30g/L
pH :3~4
液温 :30~50℃
電流密度 :1~2A/dm2
クーロン量:1~2As/dm2
本発明では、さらに次の防錆層を形成することができる。このめっき条件を下記に示す。下記においては、浸漬クロメート処理の条件を示したが、電解クロメート処理でも良い。
液組成 :重クロム酸カリウム1~10g/L、亜鉛0~5g/L
pH :3~4
液温 :50~60℃
電流密度 :0~2A/dm2(浸漬クロメート処理のため)
クーロン量:0~2As/dm2(浸漬クロメート処理のため)
防錆層上の少なくとも粗化面にシランカップリング剤を塗布するシランカップリング処理を施すことができる。
このシランカップリング剤としては、オレフィン系シラン、エポキシ系シラン、アクリル系シラン、アミノ系シラン、メルカプト系シランを挙げることができるが、これらを適宜選択して使用することができる。
塗布方法はシランカップリング剤溶液のスプレーふきつけ、コーター塗布、浸漬、流しかけ等いずれでも良い。これらについては、既に公知の技術なので(例えば、特公昭60-15654号参照)、詳細は省略する。
このシラン処理に使用するシランカップリング剤としては、オレフィン系シラン、エポキシ系シラン、アクリル系シラン、アミノ系シラン、メルカプト系シランを挙げることができるが、これらを適宜選択して使用することができる。
厚み12μmの圧延銅箔に、下記に示す条件範囲で、一次粒子層(Cu)、二次粒子層(銅-コバルト-ニッケル合金めっき)形成した。
使用した浴組成及びめっき条件は、次の通りである。
[浴組成及びめっき条件]
液組成 :銅15g/L、硫酸75g/L
液温 :35℃
電流密度 :48~60A/dm2 および1~10A/dm2
クーロン量:70~90As/dm2 および5~20As/dm2
(B)二次粒子層の形成(Cu-Co-Ni合金めっき)
液組成 :銅15g/L、ニッケル8g/L、コバルト8g/L
pH :2
液温 :40℃
電流密度 :10~33A/dm2
クーロン量:30~45As/dm2
比較例において、使用した浴組成は実施例と同じである。めっき条件は、次の通りである。
[比較例1-比較例4におけるめっき条件]
(A)一次粒子層の形成(銅めっき)
電流密度 :30~47A/dm2 および1~5A/dm2
クーロン量:40~69As/dm2 および1~5As/dm2
(B)二次粒子層の形成(Cu-Co-Ni合金めっき条件)
電流密度 :10~34A/dm2
クーロン量:30~48As/dm2
[比較例5-比較例7におけるめっき条件]
(A)一次粒子層の形成(銅めっき)
電流密度 :48~60A/dm2 および1~10A/dm2
クーロン量:70~90As/dm2 および5~20As/dm2
(B)二次粒子層の形成(Cu-Co-Ni合金めっき条件)
電流密度 :34~50A/dm2
クーロン量:46~55As/dm2
粗化処理を施した銅箔の粗化処理面上に、耐熱層1を形成した。耐熱層1の形成条件を下記に示す。
液組成 :ニッケル5~20g/L、コバルト1~8g/L
pH :2~3
液温 :40~60℃
電流密度 :5~20A/dm2
クーロン量:10~20As/dm2
上記耐熱層1を施した銅箔上に、耐熱層2を形成した。耐熱層2の形成条件を下記に示す。
液組成 :ニッケル2~30g/L、亜鉛2~30g/L
pH :3~4
液温 :30~50℃
電流密度 :1~2A/dm2
クーロン量:1~2As/dm2
(3)防錆層
上記耐熱層1および2を施した銅箔上に、さらに防錆層を形成した。防錆層の形成条件を下記に示す。
液組成 :重クロム酸カリウム1~10g/L、亜鉛0~5g/L
pH :3~4
液温 :50~60℃
電流密度 :0~2A/dm2(浸漬クロメート処理のため)
クーロン量:0~2As/dm2(浸漬クロメート処理のため)
(4)耐候性層
上記耐熱層1、2および防錆層を施した銅箔上に、さらに耐候性層を形成した。形成条件を下記に示す。
アミノ基を有するシランカップリング剤として、N-2-(アミノエチル)-3-アミノプロピルトリメトキシシラン、N-2-(アミノエチル)-3-アミノプロピルトリエトキシシラン、N-2-(アミノエチル)-3-アミノプロピルメチルジメトキシシラン、3-アミノプロピルトリメトキシシラン、3-アミノプロピルトリエトキシシラン、3-トリエトキシシリル-N-(1,3-ジメチル-ブチリデン)プロピルアミン、N-フェニル-3-アミノプロピルトリメトキシシラン等が挙げられ、これらのシランカップリング剤を単独もしくは2種以上の組み合わせで、塗布・乾燥を行い、耐候性層を形成した。
また上記の銅張積層板を一般的な回路エッチング処理用の塩化銅溶液にて銅箔をエッチング除去した後、液晶ポリマーフィルム表面を光学顕微鏡にて観察することで粗化粒子の残渣の有無による変色具合を観察した。
また、比較例として、同様の結果を表1に示す。
実施例1は、一次粒子を形成する電流密度を51A/dm2と2A/dm2とし、クーロン量を72As/dm2と8As/dm2とした場合で、二次粒子を形成する電流密度を24A/dm2とし、クーロン量を34As/dm2とした場合である。
この結果、一次粒子の平均粒子径が0.25μmで、二次粒子の平均粒子径が0.05μmであり、常態ピール強度が0.62kg/cmと高く、さらに表面粗さRzが0.98μmであり、回路エッチング後に粗化粒子の残渣による変色がないという特徴を備えていた。
この結果、一次粒子の平均粒子径が0.25μmで、二次粒子の平均粒子径が0.15μmであり、常態ピール強度が0.63kg/cmと高く、表面粗さRzが0.98μmで、回路エッチング後に粗化粒子の残渣による変色がないという特徴を備えていた。
この結果、一次粒子の平均粒子径が0.25μmで、二次粒子の平均粒子径が0.25μmであり、常態ピール強度が0.64kg/cmと高く、表面粗さRzが1.02μmで、回路エッチング後に粗化粒子の残渣による変色がないという特徴を備えていた。
この結果、一次粒子の平均粒子径が0.35μmで、二次粒子の平均粒子径が0.05μmであり、常態ピール強度が0.65kg/cmと高く、表面粗さRzが1.20μmで、回路エッチング後に粗化粒子の残渣による変色がないという特徴を備えていた。
この結果、一次粒子の平均粒子径が0.35μmで、二次粒子の平均粒子径が0.15μmであり、常態ピール強度が0.66kg/cmと高く、表面粗さRzが1.20μmで、回路エッチング後に粗化粒子の残渣による変色がないという特徴を備えていた。
この結果、一次粒子の平均粒子径が0.35μmで、二次粒子の平均粒子径が0.25μmであり、常態ピール強度が0.67kg/cmと高く、表面粗さRzが1.51μmで、回路エッチング後に粗化粒子の残渣による変色がないという特徴を備えていた。
この結果、一次粒子の平均粒子径が0.45μmで、二次粒子の平均粒子径が0.05μmであり、常態ピール強度が0.66kg/cmと高く、表面粗さRzが1.21μmで、回路エッチング後に粗化粒子の残渣による変色がないという特徴を備えていた。
この結果、一次粒子の平均粒子径が0.45μmで、二次粒子の平均粒子径が0.15μmであり、常態ピール強度が0.67kg/cmと高く、表面粗さRzが1.54μmで、回路エッチング後に粗化粒子の残渣による変色がないという特徴を備えていた。
また、実施例8は耐熱層、防錆層及び耐候性層を形成しているが、実施例1~7と同程度の結果が得られた。
この結果、一次粒子の平均粒子径が0.45μmで、二次粒子の平均粒子径が0.25μmであり、常態ピール強度が0.67kg/cmと高く、表面粗さRzが1.60μmで、回路エッチング後に粗化粒子の残渣による変色がないという特徴を備えていた。
また、実施例9は耐熱層、防錆層及び耐候性層を形成しているが、実施例1~7と同程度の結果が得られた。
比較例1は、一次粒子を形成する電流密度を47A/dm2と1A/dm2とし、クーロン量を66As/dm2と4As/dm2とした場合で、二次粒子を形成する電流密度を24A/dm2とし、クーロン量を34As/dm2とした場合である。
この結果、一次粒子の平均粒子径が0.15μmで、二次粒子の平均粒子径が0.05μmであった。回路エッチング後に粗化粒子の残渣による変色がなかったが、常態ピール強度が0.49kg/cmと低く、さらに表面粗さRzが0.87μmと低かった。
この結果、一次粒子の平均粒子径が0.15μmで、二次粒子の平均粒子径が0.15μmであり、回路エッチング後に粗化粒子の残渣による変色がなかったが、常態ピール強度が0.49kg/cmと低く、さらに表面粗さRzが0.88μmと低かった。
この結果、一次粒子の平均粒子径が0.15μmで、二次粒子の平均粒子径が0.25μmであった。常態ピール強度が0.51kg/cmと低く、さらに表面粗さRzが0.90μmであった。回路エッチング後に粗化粒子の残渣による黒色変色が観察され、不良であった。
この結果、一次粒子の平均粒子径が0.15μmで、二次粒子の平均粒子径が0.35μmと大きくなった。常態ピール強度が0.52kg/cmと低く、さらに表面粗さRzが0.91μmであった。回路エッチング後に粗化粒子の残渣による黒色変色が観察され、不良であった。
この結果、一次粒子の平均粒子径が0.25μmで、二次粒子の平均粒子径が0.35μmと大きくなった。常態ピール強度が0.64kg/cmと実施例レベルであり、さらに表面粗さRzが1.15μmであった。しかしながら、回路エッチング後に粗化粒子の残渣による黒色変色が観察され、不良であった。
この結果、一次粒子の平均粒子径が0.35μmで、二次粒子の平均粒子径が0.35μmと大きくなった。常態ピール強度が0.66kg/cmと実施例レベルであり、さらに表面粗さRzが1.50μmであった。回路エッチング後に粗化粒子の残渣による黒色変色が観察され、不良であった。
この結果、一次粒子の平均粒子径が0.45μmで、二次粒子の平均粒子径が0.35μmと大きくなった。常態ピール強度が0.66kg/cmと実施例レベルであるが、さらに表面粗さRzが1.55μmと大きくなった。回路エッチング後に粗化粒子の残渣による黒色変色が観察され、不良であった。
この結果、一次粒子の平均粒子径が0.25μmで、粉落ちはなく、常態ピール強度が0.57kg/cmと低かった。さらに表面粗さRzが1.10μmであった。回路エッチング後に粗化粒子の残渣による変色は観察されなかった。
この結果、二次粒子の平均粒子径が0.60μmと大きくなった。常態ピール強度が0.65kg/cmと実施例レベルであり、さらに表面粗さRzが0.78μmであった。回路エッチング後に粗化粒子の残渣による黒色変色が観察され、不良であった。
Claims (12)
- 銅箔と液晶ポリマーを貼り合わせた銅張積層板であって、当該銅箔は液晶ポリマーとの接着面に、銅の一次粒子層と、該一次粒子層の上に、銅、コバルト及びニッケルからなる3元系合金からなる二次粒子層とが形成されており、該一次粒子層の平均粒子径が0.25-0.45μmであり、該二次粒子層の平均粒子径が0.05-0.25μmである銅張積層板。
- 前記一次粒子層及び二次粒子層が、電気めっき層である請求項1に記載の銅張積層板。
- 二次粒子が、前記一次粒子の上に成長した1又は複数個の樹枝状の粒子である請求項1又は2に記載の銅張積層板。
- 液晶ポリマーとの接着強度が0.60kg/cm以上である請求項1~3のいずれか一項に記載の銅張積層板。
- 銅箔の液晶ポリマーとの貼り合わせ面の粗さRzが1.5μm以下である請求項1~4のいずれか一項に記載の銅張積層板。
- 銅箔の液晶ポリマーとの貼り合わせ面の粗さRzが1.0μm以下である請求項1~5のいずれか一項に記載の銅張積層板。
- 高周波プリント配線板用である請求項1~6のいずれか一項に記載の銅張積層板。
- 液晶ポリマーと貼り合わせるための銅箔であって、当該銅箔は液晶ポリマーとの貼り合わせ面に、銅の一次粒子層と、該一次粒子層の上に、銅、コバルト及びニッケルからなる3元系合金からなる二次粒子層とが形成されており、該一次粒子層の平均粒子径が0.25-0.45μmであり、該二次粒子層の平均粒子径が0.05-0.25μmである銅箔。
- 前記一次粒子層及び二次粒子層が、電気めっき層である請求項8に記載の銅箔。
- 液晶ポリマーとの接着強度が0.60kg/cm以上である請求項8又は9に記載の銅箔。
- 液晶ポリマーとの貼り合わせ面の粗さRzが1.5μm以下である請求項8~10のいずれか一項に記載の銅箔。
- 液晶ポリマーとの貼り合わせ面の粗さRzが1.0μm以下である請求項8~10のいずれか一項に記載の銅箔。
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SG2013030176A SG189489A1 (en) | 2011-06-07 | 2012-03-12 | Liquid crystal polymer-copper clad laminate and copper foil used for liquid crystal polymer-copper clad laminate |
| EP12797597.7A EP2719799A1 (en) | 2011-06-07 | 2012-03-12 | Liquid crystal polymer-copper clad laminate and copper foil used for liquid crystal polymer-copper clad laminate |
| CN201280025459.6A CN103562440B (zh) | 2011-06-07 | 2012-03-12 | 液晶聚合物覆铜层压板及该层压板中使用的铜箔 |
| KR1020157013962A KR20150065927A (ko) | 2011-06-07 | 2012-03-12 | 액정 폴리머 구리 피복 적층판 및 당해 적층판에 사용하는 구리박 |
| KR1020137014530A KR101853519B1 (ko) | 2011-06-07 | 2012-03-12 | 액정 폴리머 구리 피복 적층판 및 당해 적층판에 사용하는 구리박 |
| US13/824,478 US9060431B2 (en) | 2011-06-07 | 2012-03-12 | Liquid crystal polymer copper-clad laminate and copper foil used for said laminate |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-127772 | 2011-06-07 | ||
| JP2011127772A JP5654416B2 (ja) | 2011-06-07 | 2011-06-07 | 液晶ポリマー銅張積層板及び当該積層板に用いる銅箔 |
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| Publication Number | Publication Date |
|---|---|
| WO2012169249A1 true WO2012169249A1 (ja) | 2012-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2012/056318 Ceased WO2012169249A1 (ja) | 2011-06-07 | 2012-03-12 | 液晶ポリマー銅張積層板及び当該積層板に用いる銅箔 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US9060431B2 (ja) |
| EP (1) | EP2719799A1 (ja) |
| JP (1) | JP5654416B2 (ja) |
| KR (2) | KR101853519B1 (ja) |
| CN (1) | CN103562440B (ja) |
| MY (1) | MY163318A (ja) |
| SG (1) | SG189489A1 (ja) |
| TW (2) | TWI554392B (ja) |
| WO (1) | WO2012169249A1 (ja) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2719799A1 (en) | 2014-04-16 |
| US9060431B2 (en) | 2015-06-16 |
| CN103562440A (zh) | 2014-02-05 |
| KR101853519B1 (ko) | 2018-04-30 |
| TWI554392B (zh) | 2016-10-21 |
| TW201302456A (zh) | 2013-01-16 |
| TW201542355A (zh) | 2015-11-16 |
| US20140093743A1 (en) | 2014-04-03 |
| KR20130085055A (ko) | 2013-07-26 |
| KR20150065927A (ko) | 2015-06-15 |
| JP5654416B2 (ja) | 2015-01-14 |
| MY163318A (en) | 2017-09-15 |
| CN103562440B (zh) | 2016-04-06 |
| TWI589434B (zh) | 2017-07-01 |
| JP2012255180A (ja) | 2012-12-27 |
| SG189489A1 (en) | 2013-05-31 |
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