WO2015170715A1 - キャリア付銅箔、キャリア付銅箔の製造方法、キャリア付銅箔を用いて得られる銅張積層板及びプリント配線板 - Google Patents
キャリア付銅箔、キャリア付銅箔の製造方法、キャリア付銅箔を用いて得られる銅張積層板及びプリント配線板 Download PDFInfo
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- WO2015170715A1 WO2015170715A1 PCT/JP2015/063223 JP2015063223W WO2015170715A1 WO 2015170715 A1 WO2015170715 A1 WO 2015170715A1 JP 2015063223 W JP2015063223 W JP 2015063223W WO 2015170715 A1 WO2015170715 A1 WO 2015170715A1
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- Prior art keywords
- carrier
- copper foil
- layer
- organic
- 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
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
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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
- C25D1/00—Electroforming
- C25D1/20—Separation of the formed objects from the electrodes with no destruction of said electrodes
- C25D1/22—Separating compounds
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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
- H05K1/03—Use of materials for the substrate
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/022—Processes for manufacturing precursors of printed circuits, i.e. copper-clad substrates
- H05K3/025—Processes for manufacturing precursors of printed circuits, i.e. copper-clad substrates by transfer of thin metal foil formed on a temporary carrier, e.g. peel-apart copper
Definitions
- the invention according to the present application relates to a copper foil with a carrier, a method for producing a copper foil with a carrier, a copper-clad laminate and a printed wiring board obtained using the copper foil with a carrier.
- it relates to a peelable copper foil with a carrier.
- a copper foil with a carrier has been used as a material for manufacturing a printed wiring board used in the fields of the electric and electronic industries.
- this copper foil with a carrier is laminated with an insulating layer constituting material such as a prepreg by hot press forming to form a copper-clad laminate, and is used for manufacturing a printed wiring board.
- the copper foil with a carrier is a peelable copper foil with a carrier that is laminated with an insulating layer constituent material by hot press forming to form a copper clad laminate, and then peeled off and removed from the copper clad laminate.
- this peelable type copper foil with carrier copper foil with carrier having various peeling layers is supplied to the market.
- the copper foil with a carrier disclosed in Patent Document 1 is a copper foil with a carrier provided with a copper foil carrier, an intermediate layer laminated on the copper foil carrier, and an ultrathin copper layer formed on the intermediate layer.
- nickel and molybdenum or cobalt or a molybdenum-cobalt alloy are laminated in this order on a copper foil carrier. That is, in the copper foil with a carrier of Patent Document 1, a release layer using nickel and an inorganic material such as molybdenum or cobalt is formed between the copper foil carrier and the ultrathin copper layer.
- the electrolytic copper foil with a carrier disclosed in Patent Document 2 includes a bonding interface layer on the surface of the carrier, and an auxiliary metal layer and an electrolytic copper foil layer on the bonding interface layer.
- a bonding interface layer formed using an organic agent or metal material on the smooth surface side of the carrier using a film or metal material having a smooth surface with a roughness (Rz) of 0.05 ⁇ m to 4.0 ⁇ m
- a surface of the bonding interface layer is provided with a nickel layer having a thickness of 0.08 ⁇ m to 2.0 ⁇ m or a cobalt layer having a thickness of 0.05 ⁇ m to 3.0 ⁇ m as an auxiliary metal layer.
- an electrolytic copper foil layer is provided.
- a bonding interface layer using an organic agent or a metal material and an auxiliary metal layer using an inorganic material such as nickel or cobalt are provided between the carrier and the electrolytic copper foil layer. Is formed.
- Patent Document 1 when an intermediate layer made of nickel, molybdenum, cobalt, or the like is formed on the surface of the carrier by electrolytic treatment, the adhesion amount of nickel, molybdenum, or cobalt constituting the intermediate layer is such that the carrier and the ultrathin copper layer Affects the peel strength. If the adhesion amount of nickel is insufficient and the adhesion amount of molybdenum or cobalt is too large, the adhesive force between the copper foil carrier and the intermediate layer is reduced, and unintentional peeling of the carrier may occur during handling. In addition, the intermediate layer may remain in the ultrathin copper layer when the carrier is peeled off. Moreover, when the adhesion amount of nickel increases, pinholes increase on the surface on the ultrathin copper layer side, resulting in poor performance of the printed wiring board.
- the electrolytic treatment for forming the intermediate layer tends to be concentrated at the electrode end compared to the center of the electrode, and the current density tends to be high, so the current density is not uniform across the entire copper foil carrier. .
- the current density non-uniformity becomes remarkable. Therefore, it becomes difficult to uniformly form a layer made of nickel layer, molybdenum, cobalt, or the like on the surface of the copper foil carrier, and in particular, the peel strength varies in the width direction of the copper foil carrier.
- the carrier may be partially peeled during handling or laminated with the insulating layer constituent material, and then the carrier is pulled. When peeling off, the carrier may be difficult to peel off partially. In particular, if the carrier is difficult to partially peel after the pressing step with the insulating layer constituent material, the ultrathin copper layer may be broken. In addition, if the peel strength of the carrier is partially high, an excessive load is applied to the substrate, causing the substrate to warp or twist.
- an auxiliary metal layer using an inorganic material such as nickel or cobalt is formed by electrolytic treatment on the surface layer of the bonding interface layer using an organic agent. Therefore, similarly to the copper foil with a carrier of Patent Document 1, the electrolytic copper foil with a carrier of Patent Document 2 is more likely to concentrate current at the electrode end portion than the center portion of the electrode during electrolytic treatment, and the current density is increased. Due to this tendency, it is difficult to form the auxiliary metal layer uniformly, and it is difficult to sufficiently reduce the variation in the peel strength in the width direction of the electrolytic copper foil with carrier.
- the present invention is to provide a copper foil with a carrier in which the peel strength at the interface between the carrier and the copper foil layer is stabilized.
- the inventors of the present invention have solved the above-mentioned problems by adopting the copper foil with carrier described below.
- the copper foil with carrier according to the present invention comprises a copper foil layer on the surface of the carrier via a bonding interface layer, and the coefficient of variation in peel strength between the carrier and the copper foil layer ( CV) is 0.2 or less.
- the manufacturing method of copper foil with carrier according to the present invention is a manufacturing method of the above-described copper foil with carrier, and includes steps A, B, and C described below. It is characterized by that.
- Step A A step of forming a release layer as a bonding interface layer on the surface of the carrier.
- Step B Using an organic component-containing solution containing sulfate as a metal component source and having a chloride ion concentration of 1 g / L or less, a metal component as a part of the bonding interface layer is formed on the surface of the release layer. Forming an organic layer containing.
- Process C The process of forming a copper foil layer on the surface of the organic layer containing the said metal component.
- Copper-clad laminate The copper-clad laminate according to the present invention is obtained by using the above-described copper foil with a carrier.
- Printed wiring board The printed wiring board according to the present invention is obtained using the above-described copper foil with a carrier.
- the coefficient of variation (CV) in the peel strength between the carrier and the copper foil layer is 0.2 or less, the variation in the peel strength in the width direction of the carrier is small and stable.
- the carrier can be peeled off.
- the metal component does not react with the chloride ion by suppressing the mixing of the chloride ion into the organic layer containing the metal component. Can be combined efficiently. Therefore, the organic layer containing a metal component can be stably formed on the surface of the release layer.
- FIG. 1 It is a cross-sectional schematic diagram which shows the layer structure of the copper foil with a carrier which concerns on this invention. It is a schematic diagram of sample preparation used for evaluation of variation in peel strength. It is a figure which shows the measurement result of the peeling strength of each sample of Example 2.
- FIG. 1 It is a cross-sectional schematic diagram which shows the layer structure of the copper foil with a carrier which concerns on this invention. It is a schematic diagram of sample preparation used for evaluation of variation in peel strength. It is a figure which shows the measurement result of the peeling strength of each sample of Example 2.
- the copper foil with a carrier according to the present invention is a copper foil with a carrier having a copper foil layer on the surface of the carrier via a bonding interface layer, and a coefficient of variation (CV) in peel strength between the carrier and the copper foil layer. Is 0.2 or less.
- FIG. 1 shows a schematic cross-sectional view of a basic layer configuration of a carrier-attached copper foil according to the present invention. In addition, FIG. 1 is described so that the lamination state of each layer can be grasped, and does not reflect the actual thickness of each layer.
- the copper foil 1 with a carrier according to the present invention has a layer configuration of carrier 2 / bonding interface layer 6 / copper foil layer 5.
- “coefficient of variation (CV) in peel strength between carrier and copper foil layer” will be described in this order.
- Coefficient of variation (CV) in peel strength between carrier and copper foil layer In the copper foil with carrier according to the present invention, the coefficient of variation (CV) in peel strength between the carrier and the copper foil layer is 0.2 or less. A more preferable coefficient of variation (CV) in peel strength between the carrier and the copper foil layer is 0.15 or less. This peel strength is a value measured according to JIS C 6481-1996.
- the coefficient of variation (CV) is 0.2 or less, there is little variation in peel strength in the width direction between the carrier and the copper foil layer. Therefore, it is possible to avoid the deterioration of the peeling workability caused by an increase in the peel strength variation, and the carrier can be peeled stably. Therefore, no carrier fragments remain on the surface of the copper foil layer when the carrier is peeled off.
- the lower limit value of the coefficient of variation (CV) of the peel strength is not defined, but as the coefficient of variation (CV) is smaller, the uniformity of the peel strength in the entire region of the carrier-attached copper foil is increased and the product quality is improved. Can be made.
- the peel strength between the carrier and the copper foil layer is preferably 3 g / cm to 50 g / cm, more preferably 5 g / cm to 30 g / cm, and 7 g More preferably, it is from / cm to 20 g / cm.
- the peel strength is less than 3 g / cm, the carrier and the copper foil layer may be partially peeled unintentionally during winding of the copper foil with a carrier or the production of a copper clad laminate. Defects such as blistering and slippage are likely to occur.
- the peel strength exceeds 50 g / cm, it is difficult to peel off the carrier from the copper foil layer.
- the carrier is a material having a predetermined thickness for improving the handleability of a thin copper foil layer, and there is no particular limitation on the material.
- the copper foil layer is formed by electrolysis, it is preferable to use, as a carrier, an energizable material such as an aluminum foil, a copper foil, or a resin film whose surface is metal-coated.
- the thickness of the carrier is not particularly limited. However, when copper foil is used as the carrier, it is preferably 7 ⁇ m to 210 ⁇ m in consideration of handling properties. In the case where a copper foil as a carrier is expected to serve as a reinforcing material for preventing wrinkles, a thickness of at least 7 ⁇ m is required.
- the bonding interface layer is a layer that is sandwiched between the carrier and the copper foil layer and allows the carrier to be peeled off from the copper foil layer.
- the bonding interface layer is preferably composed of a “peeling layer” provided on the surface of the carrier and an “organic layer containing a metal component” provided on the surface of the peeling layer.
- the joining interface layer 6 consists of the peeling layer 3 and the organic layer 4 containing a metal component.
- the release layer 3 is preferably an “organic release layer” or an “inorganic release layer”.
- the “organic peeling layer” is preferably composed of one or more selected from a nitrogen-containing organic compound, a sulfur-containing organic compound and a carboxylic acid as an organic component.
- the nitrogen-containing organic compound include 1,2,3-benzotriazole, carboxybenzotriazole (hereinafter referred to as “CBTA”), N ′, N′-bis, which are triazole compounds having a substituent. (Benzotriazolylmethyl) urea, 1H-1,2,4-triazole, 3-amino-1H-1,2,4-triazole and the like are preferably used.
- the sulfur-containing organic compound it is preferable to use mercaptobenzothiazole, thiocyanuric acid, 2-benzimidazolethiol, or the like.
- the carboxylic acid it is particularly preferable to use a monocarboxylic acid, and it is particularly preferable to use oleic acid, linoleic acid, linolenic acid, or the like.
- the thickness of the organic release layer is preferably 1 nm to 10 nm.
- the “inorganic release layer” includes, as an inorganic component, metals such as chromium, nickel, molybdenum, iron, titanium, tungsten, phosphorus, zinc, tantalum, vanadium, alloys of these enumerated metals, or these enumerated Metal oxides or oxides of these listed metal alloys can be used.
- metals such as chromium, nickel, molybdenum, iron, titanium, tungsten, phosphorus, zinc, tantalum, vanadium, alloys of these enumerated metals, or these enumerated Metal oxides or oxides of these listed metal alloys can be used.
- metals such as chromium, nickel, molybdenum, iron, titanium, tungsten, phosphorus, zinc, tantalum, vanadium, alloys of these enumerated metals, or these enumerated Metal oxides or oxides of these listed metal alloys can be used.
- the binary alloy nickel-chromium,
- Ternary alloys include nickel-iron-chromium, nickel-chromium-molybdenum, nickel-chromium-tungsten, nickel-chromium-copper, nickel-chromium-phosphorus, cobalt-iron-chromium, cobalt-chromium-molybdenum. Cobalt-chromium-tungsten, cobalt-chromium-copper, cobalt-chromium-phosphorus, and the like can be used.
- the thickness of the inorganic release layer is preferably 1 nm to 300 nm, and more preferably 2 nm to 50 nm.
- the organic layer 4 containing a metal component constitutes a bonding interface layer together with the release layer described above.
- the organic layer containing a metal component is a layer containing a metal component and an organic component, and is preferably provided on the surface of the release layer after providing the release layer on the surface of the carrier.
- the surface of the release layer is in a state where the organic component and the inorganic component coexist.
- This organic layer containing a metal component is obtained by an electrolytic method using an organic component-containing solution in which the organic component is present at a concentration of 0.5 mg / L to 10 mg / L for a metal component concentration of 10 g / L to 50 g / L. It is preferable to form.
- the electrolytic treatment is performed using a wide electrolysis apparatus, not only the metal component but also the organic component adheres to the electrode end portion where the current is concentrated as compared with the center portion of the electrode. Concentration can be avoided. Therefore, the organic component is formed on the surface of the release layer in a state of being uniformly dispersed in the metal component. Therefore, variation in the peel strength in the width direction can be effectively reduced, and the carrier can be peeled stably after press molding without causing partial peeling failure.
- organic peeling layer As the organic component contained in the organic layer containing the metal component.
- the organic component described above is less likely to cause interdiffusion between the carrier and the copper foil layer during press molding at a high temperature. Therefore, since the organic layer containing the metal component exists in a state where the organic component is uniformly dispersed in the metal component on the surface of the release layer, it is possible to effectively reduce the variation in the peel strength in the width direction. .
- a metal component containing nickel and / or cobalt as a main component. This is because it has excellent heat stability when processed into a copper-clad laminate and does not change the carrier peeling characteristics.
- the thickness of the organic layer containing a metal component is preferably 5 nm to 100 nm. If it is in this range, the organic layer containing a metal component can be formed more uniformly.
- Copper foil layer The formation method of the copper foil layer is not particularly limited, but an electrolytic method is preferably employed.
- the copper foil layer is laminated with an insulating layer constituting material to form a copper clad laminate, and is used for circuit formation.
- the thickness of the copper foil layer is not particularly limited, but is preferably 12 ⁇ m or less. This is because when the thickness is larger than 12 ⁇ m, the significance of the copper foil with carrier is lost.
- the surface of the copper foil layer can be subjected to a surface treatment such as a rust prevention treatment or a silane coupling agent treatment depending on the application. For example, when the roughening treatment is performed to obtain the anchor effect, the adhesion strength, heat resistance, and the like are improved as compared with the case where the roughening treatment is not performed.
- the manufacturing method of the copper foil with a carrier which concerns on this invention is a manufacturing method of the copper foil with a carrier mentioned above, Comprising: Each process of the process A, the process B, and the process C which are described below is provided. Hereinafter, each step will be described.
- Step A is a step of forming a release layer as a bonding interface layer on the surface of the carrier.
- a solution in which an organic component or an inorganic component for forming an organic release layer or an inorganic release layer is dissolved is used, a dipping method in which a carrier is immersed in the solution, a showering method for a surface on which a release layer is formed, and a spray method
- the release layer is preferably formed using a dropping method, an electrodeposition method, or the like.
- the method for forming the release layer in the present invention is not limited to the methods listed here.
- an organic peeling layer When forming an organic peeling layer, as described above, a mixture of one or more selected from nitrogen-containing organic compounds, sulfur-containing organic compounds, and carboxylic acids is preferably used as the organic component. be able to.
- an inorganic release layer As an inorganic component, as an inorganic component, a metal such as chromium, nickel, molybdenum, iron, titanium, tungsten, phosphorus, zinc, tantalum, vanadium, or any of these listed metals.
- An alloy, an oxide of these enumerated metals, an oxide of an alloy of these enumerated metals, or the like can be used. What is necessary is just to set suitably regarding the density
- Step B an organic component-containing solution containing sulfate as a metal component source and having a chloride ion concentration of 1 g / L or less is bonded to the surface of the release layer obtained in Step A.
- This is a step of forming an organic layer containing a metal component as part of the interface layer.
- the surface of the release layer is obtained by immersing the carrier in which the release layer is formed in an organic component-containing solution in which a metal component is allowed to coexist, placing an anode electrode on the surface of the release layer, and electrolyzing the solution.
- An organic layer containing a metal component can be formed.
- the organic component used for forming the organic layer containing a metal component the organic components listed in the above-described formation of the organic release layer can be used.
- the same organic component used for forming the organic release layer it is preferable to use the same organic component used for forming the organic release layer as the organic component of the organic layer containing the metal component.
- nickel and / or cobalt can be suitably used as the metal component used for forming the organic layer containing the metal component.
- the organic component-containing solution is a solution containing sulfate as a metal component source and having a chloride ion concentration of 1 g / L or less.
- concentration of chloride ions in the organic component-containing solution exceeds 1 g / L, the chloride ions and the metal component react chemically, and the chemical bond between the metal component and the organic component is likely to be hindered.
- chemical bonding between the metal component and the organic component can be promoted, and the organic layer containing the metal component can be stably formed on the surface of the release layer.
- the content ratio of the organic component and the metal component in the organic component-containing solution preferably includes 0.5 mg / L to 10 mg / L of the organic component with respect to the metal component concentration of 10 g / L to 50 g / L. Within this range, the uniformity when electrodepositing the metal component can be sufficiently improved.
- the electrolysis condition of the organic component-containing solution is preferably a current density of 0.01 A / dm 2 to 10 A / dm 2 .
- Step C is a step of forming a copper foil layer on the surface of the organic layer containing the metal component obtained in Step B.
- the method for forming the copper foil layer is not particularly limited, but an electrolytic method is preferably employed.
- an electrolytic solution such as a copper sulfate-based solution, a copper pyrophosphate-based solution, a copper sulfamate solution, or a copper cyanide-based solution can be used.
- step C the carrier in which the organic layer containing the metal component is formed is immersed in the electrolytic solution, the anode electrode is disposed on the surface of the organic layer containing the metal component, and the electrolytic solution is electrolyzed, thereby A copper foil layer can be formed on the surface of the organic layer containing.
- the surface of the copper foil layer may be subjected to rust prevention treatment in consideration of long-term storage.
- the copper clad laminated board which concerns on this invention is obtained using the above-mentioned copper foil with a carrier, It is characterized by the above-mentioned.
- the concept of the copper clad laminate referred to in the present invention includes both a rigid copper clad laminate and a flexible copper clad laminate. If it is a rigid copper clad laminated board, it can be manufactured using a hot press system or a continuous laminating system. And if it is a flexible copper clad laminated board, it is possible to use a roll laminating system and a casting system.
- the copper clad laminate according to the present invention has a coefficient of variation (CV) in peel strength between the laminated carrier and the copper foil layer of 0.2 or less. Therefore, the copper-clad laminate has a small variation in peel strength between the laminated carrier and the copper foil layer in the width direction of the carrier, so that the carrier can be stably peeled from the copper foil layer.
- CV coefficient of variation
- the printed wiring board which concerns on this invention is obtained using the above-mentioned copper foil with a carrier, It is characterized by the above-mentioned.
- the manufacturing method of the printed wiring board which concerns on this invention For example, if a circuit is formed by etching the above-described rigid copper-clad laminate, a rigid printed wiring board can be obtained.
- a circuit is formed by etching a flexible copper-clad laminate, a flexible printed wiring board having good bending performance can be obtained.
- the coefficient of variation (CV) of the peel strength between the laminated carrier and the copper foil layer is 0.2 or less, so the carrier of the laminated carrier and the copper foil layer The variation in peel strength in the width direction is small, and the carrier can be peeled stably from the copper foil layer.
- Examples 1 to 3 differ only in the organic component content of the solution forming the organic layer, and the other production conditions are the same. Therefore, after describing the first embodiment, the differences between the second embodiment and the third embodiment from the first embodiment will be described.
- Example 1 an electrolytic copper foil having a width of 1350 mm and a thickness of 18 ⁇ m was used as a carrier, and the pickling treatment was performed by immersing in a dilute sulfuric acid solution having a sulfuric acid concentration of 150 g / L and a liquid temperature of 30 ° C. for 30 seconds. The oil and fat component and the surface oxide film were removed.
- the carrier subjected to the pickling treatment was washed with water and then immersed in a solution having a CBTA concentration of 5 g / L, a liquid temperature of 40 ° C., and a pH of 5 for 30 seconds to form an organic peeling layer having a thickness of 5 nm on the surface of the carrier. .
- the carrier on which the organic release layer has been formed is immersed in a solution having a nickel sulfate concentration of 240 g / L, a CBTA concentration of 0.5 mg / L, a liquid temperature of 40 ° C., and a pH of 3, and electrolyzed under a current density of 8 A / dm 2 .
- the organic layer containing the metal component was formed on the surface of the organic release layer so that the total thickness of the bonding interface layer including the organic release layer and the organic layer containing the metal component was 15 nm.
- the solution used for forming the organic layer containing the metal component did not use nickel chloride as the metal component source, so the concentration of chloride ions was 1 g / L or less.
- the carrier on which the organic layer containing the metal component is formed is immersed in a copper electrolyte solution having a copper concentration of 65 g / L, a sulfuric acid concentration of 150 g / L, and a liquid temperature of 45 ° C., and electrolyzed under the condition of a current density of 15 A / dm 2 .
- a copper foil layer having a thickness of 3 ⁇ m was formed on the surface of the organic layer containing the metal component.
- a rust prevention process is performed and the copper foil with a carrier laminated
- Example 2 the CBTA concentration of the solution forming the organic layer containing the metal component was 2 mg / L.
- Example 3 the CBTA concentration of the solution forming the organic layer containing the metal component was 5 mg / L.
- Comparative Example 1 In Comparative Example 1, the carrier of Comparative Example 1 under the same conditions as in Example 1 except that a solution having a nickel sulfate concentration of 240 g / L that does not contain an organic component was used as a solution for forming an organic layer containing a metal component. An attached copper foil was produced.
- Comparative Example 2 In Comparative Example 2, a solution having a nickel sulfate concentration of 240 g / L, a nickel chloride concentration of 50 g / L, and a CBTA concentration of 2 mg / L was used as a solution for forming an organic layer containing a metal component. The chloride ion concentration of the solution was 15 g / L. Other than that, the copper foil with a carrier of the comparative example 2 was produced on the conditions similar to Example 1. FIG.
- FIG. 3 shows the results when the peel strength of each sample of the copper foil with carrier of Example 2 was measured.
- FIG. 3 shows the peel strength of each sample corresponding to the position before the width direction and the length direction of the copper foil with carrier are cut.
- the carrier-attached copper foil of each Example provided with an organic layer in which a metal component and an organic component coexist had a variation coefficient (CV) of peel strength of 0.17 or less. Moreover, the average of the peeling strength of the copper foil with a carrier of each Example was 20 g / cm or less.
- the carrier-attached copper foil of Comparative Example 1 provided with the metal layer composed only of the metal component not containing the organic component has an average peel strength of 24.6 g / cm.
- the coefficient of variation (CV) in peel strength was 0.276, which was higher than 0.2.
- the copper foil with a carrier of the comparative example 2 using the solution whose chloride ion concentration of the solution which forms the organic layer containing a metal component is 15 g / L has an average peel strength of 7.3 g / cm, although the CBTA concentration conditions were the same as in Example 2, the peel strength variation coefficient (CV) was 0.222, which was higher than 0.2 as in Comparative Example 1.
- the coefficient of variation (CV) in the peel strength between the carrier and the copper foil layer is 0.2 or less, the variation in the peel strength in the width direction of the carrier is small and stable.
- the carrier can be peeled from the copper foil layer.
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Abstract
Description
工程A:キャリアの表面に接合界面層として剥離層を形成する工程。
工程B:金属成分源としての硫酸塩を含み、塩化物イオンの濃度が1g/L以下である有機成分含有溶液を用いて、当該剥離層の表面に、前記接合界面層の一部として金属成分を含む有機層を形成する工程。
工程C:当該金属成分を含む有機層の表面に銅箔層を形成する工程。
本件発明に係るキャリア付銅箔は、キャリアの表面に接合界面層を介して銅箔層を備えるキャリア付銅箔であって、当該キャリアと当該銅箔層との剥離強度の変動係数(CV)が、0.2以下であることを特徴とする。図1に本件発明に係るキャリア付銅箔の基本的層構成の断面模式図を示す。なお、図1は各層の積層状態を把握できるように記載したものであり、現実の各層の厚さを反映させたものではない。図1に示すように、本件発明に係るキャリア付銅箔1は、キャリア2/接合界面層6/銅箔層5の層構成を備える。以下において、「キャリアと銅箔層との剥離強度の変動係数(CV)」、「キャリア」、「接合界面層」、「銅箔層」について順に説明する。
変動係数(CV)=標準偏差(stdev)/平均値(ave)・・・(式)
本件発明に係るキャリア付銅箔の製造方法は、上述したキャリア付銅箔の製造方法であり、以下に述べる工程A、工程B、工程Cの各工程を備えることを特徴とする。以下、各工程毎に説明する。
本件発明に係る銅張積層板は、上述のキャリア付銅箔を用いて得られることを特徴とする。本件発明でいう銅張積層板の概念には、リジッド銅張積層板及びフレキシブル銅張積層板の双方が含まれる。リジッド銅張積層板であれば、ホットプレス方式や連続ラミネート方式を用いて製造することが可能である。そして、フレキシブル銅張積層板であれば、ロールラミネート方式やキャスティング方式を用いることが可能である。
本件発明に係るプリント配線板は、上述のキャリア付銅箔を用いて得られることを特徴とする。本件発明に係るプリント配線板の製造方法に関して特段の限定はない。例えば、上述したリジッド銅張積層板をエッチング加工する等して回路形成すれば、リジッドプリント配線板が得られる。また、フレキシブル銅張積層板をエッチング加工する等して回路形成すれば、良好な屈曲性能を備えるフレキシブルプリント配線板が得られる。本件発明に係るキャリア付銅箔は、積層されたキャリアと銅箔層との剥離強度の変動係数(CV)が、0.2以下であるため、積層されたキャリアと銅箔層とのキャリアの幅方向における剥離強度のバラツキが小さく、安定してキャリアを銅箔層から剥離することができる。
比較例1では、金属成分を含む有機層を形成する溶液として、有機成分を含まない、硫酸ニッケル濃度240g/Lの溶液を用いた以外は、実施例1と同様の条件で比較例1のキャリア付銅箔を作製した。
比較例2では、金属成分を含む有機層を形成する溶液として、硫酸ニッケル濃度240g/L、塩化ニッケル濃度50g/L、CBTA濃度2mg/Lの溶液を用いた。当該溶液の塩化物イオン濃度は、15g/Lであった。それ以外は、実施例1と同様の条件で比較例2のキャリア付銅箔を作製した。
上述した実施例1~実施例3及び比較例1、比較例2のキャリア付銅箔をプリプレグ(三菱瓦斯化学株式会社製:GHPL-830MBT)にそれぞれ当接させ、真空プレス機を使用して、プレス圧25kg/cm2、温度220℃、プレス時間90分の条件で積層し銅張積層板を作製した。そして、各実施例1~実施例3及び比較例1、比較例2のキャリア付銅箔を用いて作製した銅張積層板を、図2の模式図に示すように、キャリア付銅箔の幅方向に13箇所、長さ方向に5箇所に切り分け、計65個の100mm×70mmの試料とし、各試料について剥離強度を測定した。なお、各試料の剥離強度の測定は、JIS C6481-1996に準拠して行った。
2 キャリア
3 剥離層
4 金属成分を含む有機層
5 銅箔層
6 接合界面層
Claims (9)
- キャリアの表面に接合界面層を介して銅箔層を備えるキャリア付銅箔であって、
当該キャリアと当該銅箔層との剥離強度の変動係数(CV)が、0.2以下であることを特徴とするキャリア付銅箔。 - 前記接合界面層は、前記キャリアの表面に設けられる剥離層と、当該剥離層の表面に設けられる金属成分を含む有機層とからなる請求項1に記載のキャリア付銅箔。
- 前記金属成分が、ニッケル、及び/又は、コバルトを含む請求項1に記載のキャリア付銅箔。
- 前記剥離層が、有機成分からなる請求項2又は請求項3に記載のキャリア付銅箔。
- 前記有機層は、前記剥離層で用いた有機成分を含む請求項4に記載のキャリア付銅箔。
- 前記剥離層が、無機成分からなる請求項2又は請求項3に記載のキャリア付銅箔。
- 請求項1~請求項6に記載のキャリア付銅箔の製造方法であって、
以下に述べる工程A、工程B、工程Cの各工程を備えることを特徴とするキャリア付銅箔の製造方法。
工程A:キャリアの表面に接合界面層として剥離層を形成する工程。
工程B:金属成分源としての硫酸塩を含み、塩化物イオンの濃度が1g/L以下である有機成分含有溶液を用いて、当該剥離層の表面に、前記接合界面層の一部として金属成分を含む有機層を形成する工程。
工程C:当該金属成分を含む有機層の表面に銅箔層を形成する工程。 - 請求項1~請求項6のいずれかに記載のキャリア付銅箔を用いて得られることを特徴とする銅張積層板。
- 請求項1~請求項6のいずれかに記載のキャリア付銅箔を用いて得られることを特徴とするプリント配線板。
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| US20230020180A1 (en) * | 2019-11-27 | 2023-01-19 | Ymt Co.,Ltd. | Carrier foil-attached metal foil, method of manufacturing the same, and laminate including the same |
| JP2024506607A (ja) * | 2020-12-10 | 2024-02-14 | ワイエムティー カンパニー リミテッド | キャリア付き金属箔用剥離層およびそれを備える金属箔 |
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| KR101942257B1 (ko) | 2016-12-13 | 2019-01-25 | 전남대학교산학협력단 | 골다공증 저항성 마우스 모델 및 이를 이용한 골다공증 예방 또는 치료 활성 물질의 스크리닝 방법 |
| JP2018171899A (ja) * | 2017-03-31 | 2018-11-08 | Jx金属株式会社 | 離型層付銅箔、積層体、プリント配線板の製造方法及び電子機器の製造方法 |
| CN107475698B (zh) * | 2017-06-23 | 2020-04-10 | 安庆师范大学 | 一种超薄铜箔剥离层Ni-Cr-B-P的制备方法 |
| KR102686711B1 (ko) * | 2020-12-10 | 2024-07-19 | 와이엠티 주식회사 | 캐리어 부착 금속박용 이형층 및 이를 포함하는 금속박 |
| KR102511335B1 (ko) * | 2022-05-09 | 2023-03-17 | 와이엠티 주식회사 | 캐리어 부착 금속박용 복합 이형층 및 이를 포함하는 금속박 |
| KR20240085453A (ko) * | 2022-12-08 | 2024-06-17 | 롯데에너지머티리얼즈 주식회사 | 캐리어박 부착 동박 및 이를 이용한 동박 적층판 |
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| JPWO2015170715A1 (ja) | 2017-04-20 |
| TWI582275B (zh) | 2017-05-11 |
| TW201544636A (zh) | 2015-12-01 |
| KR20160111985A (ko) | 2016-09-27 |
| CN106460212B (zh) | 2019-05-14 |
| KR101807453B1 (ko) | 2017-12-08 |
| CN106460212A (zh) | 2017-02-22 |
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