WO2015152380A1 - 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
- Publication number
- WO2015152380A1 WO2015152380A1 PCT/JP2015/060492 JP2015060492W WO2015152380A1 WO 2015152380 A1 WO2015152380 A1 WO 2015152380A1 JP 2015060492 W JP2015060492 W JP 2015060492W WO 2015152380 A1 WO2015152380 A1 WO 2015152380A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- copper foil
- carrier
- layer
- release layer
- peeling
- Prior art date
Links
Classifications
-
- 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
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- 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
-
- 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
-
- 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
- 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
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
-
- 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
- B32B2311/00—Metals, their alloys or their compounds
- B32B2311/24—Aluminium
-
- 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
- B32B2457/00—Electrical equipment
- B32B2457/08—PCBs, i.e. printed circuit boards
Definitions
- This invention relates to the copper foil with a carrier, the manufacturing method of this copper foil with a carrier, the copper clad laminated board obtained using this copper foil with a carrier, and a printed wiring board.
- the present invention relates to a carrier-attached copper foil that hardly oxidizes the surface of the copper foil after peeling off the carrier.
- Patent Document 1 states that “provides a copper foil with a carrier that can be peeled off after a lamination process on an insulating substrate while the ultrathin copper layer does not peel off from the carrier before the lamination process on the insulating substrate”.
- a copper foil with a carrier constituted by laminating molybdenum, cobalt, or molybdenum-cobalt alloy in this order is disclosed.
- Patent Document 2 states that “an electrolytic copper foil with a carrier foil having a bonding interface layer on the surface of the carrier foil, and an auxiliary metal layer and an electrolytic copper foil layer on the bonding interface layer.
- An electrolytic copper foil with a carrier foil provided with a bonding interface layer formed using an organic agent or a metal material on the smooth surface side is disclosed.
- the copper foil with a carrier as described above is first laminated with a prepreg or a resin in a manufacturing process of a printed wiring board, and processed into a copper-clad laminate. And in the state which peeled the carrier of the copper foil with a carrier from the copper clad laminated board, it may be stored and transported until the subsequent laser drilling process and circuit formation process.
- the copper foil with a carrier disclosed in Patent Document 1 employs nickel and molybdenum, cobalt, or a molybdenum-cobalt alloy as an intermediate layer laminated between the copper foil carrier and the ultrathin copper layer. Therefore, when the ultrathin copper layer is exposed by peeling at the interface between the ultrathin copper layer and the intermediate layer, the ultrathin copper layer immediately contacts with the atmosphere and oxidation proceeds immediately.
- the electrolytic copper foil with a carrier foil disclosed in Patent Document 2 has an organic agent that forms a bonding interface layer on the surface layer of the auxiliary metal layer when the carrier foil is peeled from the electrolytic copper foil layer.
- This organic agent plays a role as a rust prevention layer of the electrolytic copper foil layer.
- the electrolytic copper foil with carrier foil disclosed in Patent Document 2 is difficult to separate the organic agent and the auxiliary metal uniformly in the same plane, so the rust prevention function varies, and after the carrier foil is peeled off The oxidation of the surface of the electrolytic copper foil proceeds locally.
- the hole diameter varies in the laser drilling process when wiring the ultra-thin copper foil. If the hole diameter varies, a hole diameter different from the required range is formed, resulting in a defective product. In addition, since the portion where the surface is oxidized is more easily etched than the portion which is not oxidized, the etching process during pattern formation also varies. If the etching process varies, the circuit width differs from the required range, resulting in a defective product. In particular, when the circuit is remarkably thinned, the possibility of disconnection increases.
- the present inventors have achieved the above-mentioned problems by adopting the copper foil with carrier described below.
- the copper foil with carrier according to the present invention is a copper foil with carrier laminated in the order of a carrier, a release layer, and a copper foil, and the release surface of the copper foil immediately after carrier release of the copper foil with carrier.
- a lightness L * value of the difference between the lightness L * value of the release surface after the copper foil after the carrier peel was left temperature 25 ° C. and under a constant-temperature humidified atmosphere of 50% humidity and 70% 3 days 1.5 It is within.
- 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 the steps A, B, and C described below. And A: A step of forming an inorganic release layer or an organic release layer as a release layer on the surface of the carrier. B: The process of forming the metal dispersion layer containing an organic component as a peeling layer on the surface of the said inorganic peeling layer or the organic peeling layer. C: A step of forming a copper foil on the surface of the metal dispersion layer.
- 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 copper foil with a carrier according to the present invention Since the copper foil with a carrier according to the present invention has an excellent anti-oxidation property on the surface of the copper foil after peeling the carrier, it is processed into a copper-clad laminate and then stored or transported in a state where the carrier is peeled off. Even if it is, oxidation of the copper foil surface hardly occurs. Therefore, even if the copper foil with a carrier according to the present invention is stored in the atmosphere for 3 days or more without peeling the carrier and subjecting the copper foil surface to a special rust prevention treatment, laser drilling or pattern formation is performed. Variation in etching process is small. Therefore, the copper foil with a carrier according to the present invention can form a hole diameter and a circuit width within a required range. Further, it is possible to avoid a possibility that the circuit is remarkably thinned and disconnection occurs.
- the copper foil with a carrier according to the present invention has a lightness L * value of the peeled surface of the copper foil immediately after the carrier peeling of the copper foil with the carrier and the copper foil after the carrier peeling at a temperature of 25 ° C. and a humidity of 50% to 70%.
- the difference between the lightness L * value of the peeled surface after being left for 3 days in a constant temperature and humid atmosphere is within 1.5.
- the peeling surface of copper foil here is the surface on the side where the carrier of copper foil is peeled off.
- the surface of the copper foil carrier from which the carrier has been peeled is referred to as a peeled surface.
- this copper foil with a carrier is equipped with the layer structure laminated
- the copper foil with carrier according to the present invention adopts the lightness L * value by color difference measurement as an index of the antioxidant property of the copper foil after carrier peeling.
- the lightness L * value by color difference measurement represents a brighter color tone as the value increases, and represents a darker tone as the value decreases.
- the peeling surface of the copper foil after carrier peeling is oxidized, the degree of black is high and the lightness L * value by color difference measurement is low. Therefore, the smaller the difference between the lightness L * value of the peeled surface of the copper foil immediately after the carrier peeling and the lightness L * value of the peeled surface of the copper foil after the carrier is left to stand, the copper foil after the carrier peeling.
- the inventors of the present invention described “the brightness L * value of the peeled surface of the copper foil immediately after the carrier peeling” and “the copper foil after the carrier peeling in a constant temperature and humid atmosphere at a temperature of 25 ° C. and a humidity of 50% to 70%. It was conceived that if the difference from the “lightness L * value of the peeled surface after being left for 3 days” is within 1.5, it can be determined that the copper foil after carrier peeling has excellent antioxidant properties.
- the difference in the lightness L * value of the peeled surface of the copper foil before and after the carrier peeling is more preferably 1.0 or less, and further preferably 0.5 or less.
- the copper foil from which the carrier has been peeled is left to stand for 3 days in a constant temperature humidified atmosphere at a temperature of 25 ° C. and a humidity of 50% to 70%, and then the copper foil is spaced at an interval of 10 cm.
- the standard deviation ⁇ of the brightness L * value of the peeled surface of the copper foil measured at a plurality of locations is preferably 1 or less.
- the standard deviation ⁇ of the lightness L * value of the peeled surface is more preferably 0.7, and further preferably 0.5.
- the copper foil with a carrier according to the present invention is produced by continuously producing copper on the surface of the carrier wound up in a roll shape by the production method, so that the winding direction and its There is a width direction perpendicular to the winding direction. Therefore, in the present invention, the standard deviation ⁇ in the width direction is used in order to capture the variation in the brightness L * value of the peeled surface in the width direction of the copper foil after carrier peeling. This is because when the oxidation is locally progressing on the copper foil surface after the carrier peeling, the local variation of the lightness L * value in the color difference measurement becomes large.
- the copper foil with a carrier according to the present invention has a standard deviation ⁇ of the lightness L * value of the peeled surface of the copper foil measured at a plurality of locations at intervals of 10 cm in the width direction, it is 1 or less. It can be judged that it has excellent antioxidant properties with little variation. Therefore, the copper foil with a carrier according to the present invention can reduce the variation in the hole diameter in the laser drilling process to the copper foil and the variation in the etching process at the time of pattern formation over the width direction.
- the brightness L * value of the peeling surface of the said copper foil immediately after peeling a carrier is 50 or less. This is because, if the lightness L * value immediately after the carrier peeling is 50 or less, the laser processability is enhanced, and the variation in the lightness L * value caused by the standing time after the carrier peeling and the environmental change tends to be reduced. Therefore, by setting the lightness L * value immediately after the carrier peeling to 50 or less, a via having a uniform hole diameter can be formed by laser processing, and the uniformity within the same surface of the etching process during pattern formation can be improved.
- the lightness L * value immediately after the carrier peeling is more preferably 45 or less, still more preferably 43 or less, and particularly preferably 40 or less, from the viewpoint of reducing variations in the lightness L * value caused by subsequent standing time or environmental changes. Is preferred.
- the carrier is a material having a predetermined thickness in order to improve the handleability of the thin copper foil, and the material is not particularly limited.
- a carrier that can be energized such as an aluminum foil, a copper foil, or a resin film whose surface is metal-coated is used. It is preferable.
- the thickness of the carrier is not limited, but when a copper foil is used as the carrier, a thickness of 7 ⁇ m to 210 ⁇ m is preferable in consideration of handling properties. In order to expect a copper foil as a carrier to serve as a reinforcing material for preventing wrinkles, a thickness of at least 7 ⁇ m is required.
- the release layer is a layer that exists in a state of being sandwiched between the carrier and the copper foil, and allows the carrier to be peeled off.
- the release layer is either “an inorganic release layer using an inorganic component” or “an organic release layer using an organic component”.
- “Inorganic release layer using inorganic components” includes metals such as chromium, nickel, molybdenum, cobalt, iron, titanium, tungsten, phosphorus, zinc, tantalum, vanadium, alloys of these metals, or these The listed metal oxides or oxides of these listed metal alloys can be used.
- the thickness of the inorganic release layer is preferably 1 nm to 1000 nm.
- the organic release layer using an organic component can stabilize the carrier peel strength at a lower level than the inorganic release layer.
- the organic component is preferably one or more selected from nitrogen-containing organic compounds, sulfur-containing organic compounds, and carboxylic acids.
- 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, imidazole, etc. 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 100 nm.
- the release layer in the present invention preferably includes a “metal dispersion layer containing an organic component” on the surface of either the inorganic release layer or the organic release layer described above.
- the metal dispersion layer is a layer containing an organic component and a metal component, and is provided on the surface of either the inorganic release layer or the organic release layer after providing the inorganic release layer or the organic release layer on the surface of the carrier. Is.
- the “organic component” and the “metal component” can be present in an appropriate and uniform manner on the surface of the copper foil after the carrier peeling, and the metal on the surface of the inorganic peeling layer or the organic peeling layer.
- the “organic component” is preferably the organic component used in the organic release layer.
- the “metal component” preferably contains 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 metal dispersion layer is preferably 5 nm to 100 nm. When the thickness of the metal dispersion layer is 5 nm or more, the antioxidant property on the surface of the copper foil after carrier peeling is excellent. Moreover, when the thickness is 100 nm or less, the copper foil formed on the surface of the metal dispersion layer can be formed uniformly.
- Copper foil The copper foil provided on the surface of the above-described release layer of the copper foil with a carrier according to the present invention is not particularly limited in the formation method, but an electrolytic method is preferably employed.
- This copper foil is laminated with an insulating resin layer to form a copper-clad laminate, and is used for circuit formation.
- This copper foil is not particularly limited in thickness. However, a thickness of 12 ⁇ m or less is desirable. This is because when it is thicker than 12 ⁇ m, the significance of the copper foil with carrier is lost.
- the following various surface treatments can also be performed on the outer surface of the copper foil. This surface treatment is performed by appropriately combining rust prevention treatment, roughening treatment, silane coupling agent treatment, etc. according to the application. For example, a roughening process may be added to obtain an anchor effect. This is because high adhesion strength, heat resistance, and the like are improved as compared with the case where the surface of the copper foil is not roughened.
- 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 an inorganic release layer or an organic release layer as a release layer on the surface of the carrier.
- the step A it is preferable to use a solution in which an organic component or an inorganic component used for forming an inorganic release layer or an organic release layer is dissolved, a dipping method in which a carrier is immersed in the solution, and a shower on the surface on which the release layer is formed.
- a ring method, a spray method, a dropping method, an electrodeposition method, or the like is used.
- the method for forming the release layer in the present invention is not limited to the methods listed here.
- the inorganic release layer as described above, metals such as chromium, nickel, molybdenum, cobalt, iron, titanium, tungsten, phosphorus, zinc, tantalum, vanadium, or these are listed. Metal alloys, oxides of these enumerated metals, oxides of these enumerated metals, or the like can be used.
- the organic component is a mixture of one or more selected from nitrogen-containing organic compounds, sulfur-containing organic compounds, and carboxylic acids. It can be used suitably. The concentration of the inorganic component or organic component in the solution after dissolving the inorganic component or organic component, the temperature of the solution, the treatment time, and the like can be appropriately set.
- Step B is a step of forming a metal dispersion layer containing an organic component as a part of the release layer on the surface of the inorganic release layer or the organic release layer obtained in Step A.
- a carrier on which an inorganic release layer or an organic release layer is formed is immersed in a metal component-containing solution in which an organic component coexists, and an anode electrode is formed on the surface of the carrier on which the inorganic release layer or the organic release layer is formed.
- a metal dispersion layer containing an organic component can be formed on the surface of the inorganic release layer or the organic release layer.
- the organic component used for forming the metal dispersion layer the same organic component as the organic component used for forming the organic release layer described above can be used. Moreover, as above-mentioned as a metal component used for formation of the said metal dispersion layer, nickel and / or cobalt can be used conveniently.
- a metal component used for formation of the said metal dispersion layer nickel and / or cobalt can be used conveniently.
- the content ratio of the metal component and the organic component in the metal component-containing solution is 0.5 mg / L of the organic component with respect to the metal component concentration of 10 g / L to 50 g / L. It is preferable to contain L to 10 mg / L. If the concentration of the organic component is higher than 10 mg / L for a metal component concentration of 10 g / L to 50 g / L, the peel strength between the inorganic release layer or the organic release layer and the metal dispersion layer may be insufficient. It is not preferable.
- the current density is preferably 0.01 A / dm 2 to 10 A / dm 2 as the electrolysis conditions of the metal component-containing solution.
- Step C is a step of forming a copper foil on the surface of the metal dispersion layer obtained in Step B.
- the method for forming the copper foil is not particularly limited, but it is preferable to employ an electrolytic method.
- an electrolytic solution that can be used as a copper ion supply source, such as a copper sulfate-based solution or a copper pyrophosphate-based solution.
- the carrier in which the metal dispersion layer is formed is immersed in the electrolytic solution, the anode electrode is disposed on the surface of the carrier on which the metal dispersion layer is formed, and electrolysis is performed by using the electrolyte.
- a copper foil can be formed on the surface of the layer.
- the carrier-attached copper foil according to the present invention described above can be obtained.
- the copper foil with a carrier obtained by the manufacturing method has a “lightness L * value of the peeled surface of the copper foil immediately after carrier peeling” and a “constant temperature of the copper foil after carrier peeling at a temperature of 25 ° C. and a humidity of 50% to 70%.
- the difference from the “lightness L * value of the peeled surface after being left for 3 days in a humidified atmosphere” is within 1.5. Therefore, according to the manufacturing method of the copper foil with a carrier of this invention, it becomes possible to provide stably the copper foil with a carrier provided with the antioxidant characteristic which the copper foil after carrier peeling was excellent.
- 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 the roll lamination system and the casting system which are the prior art.
- the copper-clad laminate according to the present invention comprises a laminated copper foil “lightness L * value of the peeled surface of the copper foil immediately after carrier peeling” and “a copper foil after carrier peeling at a temperature of 25 ° C. and a humidity of 50% to
- the difference from the “lightness L * value of the peeled surface after being left for 3 days in a 70% constant temperature humidified atmosphere” is within 1.5. Therefore, even if the carrier of the copper-clad laminate is peeled off and left in the atmosphere for 3 days or more, there are few variations in the laser drilling of the copper foil and the etching process during pattern formation.
- the copper foil layer on the surface thereof has good anti-oxidation characteristics, it is possible to form the hole diameter and circuit width within the required range. Further, it is possible to avoid a possibility that the circuit is remarkably thinned and disconnection occurs.
- 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 copper foil with a carrier according to the present invention is suitable for forming a fine pattern circuit required for a printed wiring board because the surface of the copper foil after peeling the carrier has an excellent antioxidant property.
- the printed wiring board according to the present invention can be used for laser drilling or patterning on the copper foil layer on the surface even if the carrier is peeled off at the stage of the copper clad laminate and left in the atmosphere for 3 days or more. There is little variation in the etching process during formation. Therefore, the printed wiring board according to the present invention can form a hole diameter according to a required range or a circuit having a circuit width. Further, it is possible to avoid a possibility that the circuit is remarkably thinned and disconnection occurs.
- Samples A to E in which a carrier, a release layer, and a copper foil were laminated in this order were prepared as copper foils with a carrier.
- the working samples A to E differ only in the composition of the solution used to form the release layer used, and the other sample preparation conditions are the same.
- the implementation samples B to E will be described with respect to differences from the implementation sample A.
- Example Sample A uses an electrolytic copper foil having a width of 1350 mm and a thickness of 18 ⁇ m as a carrier, and is dipped 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 for pickling. The oil component and the surface oxide film adhering to the surface were removed.
- the pickled carrier was dipped 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 release layer having a thickness of 10 nm on the surface of the carrier.
- the carrier on which the organic release layer is formed is immersed in a solution having a nickel concentration of 20 g / L, a CBTA concentration of 0.5 mg / L, a liquid temperature of 40 ° C., and a pH of 3 produced using nickel sulfate, and a current density of 8 A / dm 2.
- the nickel layer containing a 90 nm-thick organic component was formed as a metal dispersion layer on the surface of the organic release layer.
- Example Sample B had a CBTA concentration of 2 mg / L of the solution forming the metal dispersion layer.
- Implementation sample C had a CBTA concentration of 5 mg / L of the solution forming the metal dispersion layer.
- Example Sample D used a solution having a chromium concentration of 5 g / L as a solution for forming an inorganic release layer. Moreover, the solution similar to the implementation sample B was used for forming the metal dispersion layer.
- Implementation sample E is a carrier having an organic release layer formed in the same manner as implementation sample A. Cobalt concentration is 20 g / L, CBTA concentration is 2 mg / L, liquid temperature is 40 ° C., and pH is 3 It was immersed in a solution and electrolyzed under conditions of a current density of 1 A / dm 2 to form a cobalt layer containing an organic component having a thickness of 90 nm as a metal dispersion layer on the surface of the organic release layer.
- a comparative sample containing no organic component or inorganic component was prepared in the solution forming the metal dispersion layer.
- a solution having a nickel concentration of 20 g / L prepared using nickel sulfate and containing no organic component or inorganic component was used as the solution for forming the metal dispersion layer.
- the comparative sample was produced on the same conditions as the implementation sample A.
- Each of the above-mentioned implementation samples A to E and the copper foil with a carrier of the comparative sample was brought into contact with a prepreg (manufactured by Mitsubishi Gas Chemical Co., Inc .: GHPL-830NX-A), and a pressing pressure of 3. Lamination was performed under the conditions of 9 MPa, a temperature of 220 ° C., and a press time of 90 minutes to produce a 50 cm square copper-clad laminate. Then, the carrier is peeled from the copper-clad laminate produced using the copper foil with carrier of each of the implementation samples A to E and the comparative sample, and the lightness L * immediately after the carrier peeling of the peeled surface of the copper foil after the carrier peeling . Value, difference in lightness L * value before and after standing, and standard deviation ( ⁇ ) of lightness L * value after the standing period were measured to confirm the presence or absence of antioxidant properties.
- Evaluation method of lightness L * value immediately after carrier peeling About the obtained copper clad laminated board immediately after carrier peeling, the lightness L * value was measured about the predetermined location of the peeling surface of copper foil. The lightness L * value was measured according to JIS standard Z8722 using a spectroscopic color difference meter SE2000 manufactured by Nippon Denshoku Industries Co., Ltd., and the lightness L * value was obtained from the result based on JIS standard Z8729.
- Evaluation method of difference in lightness L * value before and after standing The obtained copper-clad laminate after peeling the carrier is left indoors (temperature 25 ° C, humidity 50% to 70%) for 3 days, once a day. time lightness L * value was measured for a predetermined portion of the release surface of the copper foil after the carrier peeling, the peeled surface after the lapse of lightness L * value and a predetermined time of the release surface of the copper foil after the carrier peeling described above for The difference from the lightness L * value was determined.
- Table 1 summarizes the evaluation results of the working samples A to E and the comparative sample and the conditions (solution for forming the inorganic release layer or organic release layer, solution for forming the metal dispersion layer) during the preparation of the working samples A to E and the comparative sample. Show. While referring to the results shown in Table 1, the examples of the present invention and the comparative examples are compared.
- the variation in the hole diameter in the laser drilling process accompanying the oxidation and the variation in the etching treatment were confirmed.
- the comparative sample was confirmed to have a large variation in the hole diameter and the etching treatment, while the sample samples A to E were not confirmed to have a large variation in the hole diameter and the etching treatment.
- the copper foil If the standard deviation ( ⁇ ) of the lightness L * value measured at intervals of 10 cm in the width direction is 1 or less, it can be determined that the copper foil has excellent antioxidant characteristics with little variation over the width direction of the copper foil. Furthermore, if the lightness L * value of the copper foil surface immediately after carrier peeling is 50 or less, vias with a uniform hole diameter can be formed by laser processing, and the uniformity within the same plane of the etching process during pattern formation can be improved. I can say that.
- the copper foil with carrier and the method for producing the copper foil with carrier according to the present invention it is possible to effectively prevent oxidation of the peeled surface of the copper foil after carrier peeling. Therefore, according to the copper foil with a carrier and the method for producing a copper foil with a carrier according to the present invention, it is possible to provide a copper foil with a carrier that is unlikely to be oxidized in the copper foil after peeling the carrier. It can employ
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Laminated Bodies (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
A:キャリアの表面に剥離層として無機剥離層又は有機剥離層を形成する工程。
B:当該無機剥離層又は有機剥離層の表面に剥離層として有機成分を含む金属分散層を形成する工程。
C:当該金属分散層の表面に銅箔を形成する工程。
本件発明に係るキャリア付銅箔は、当該キャリア付銅箔のキャリア剥離直後の銅箔の剥離面の明度L*値と、キャリア剥離後の銅箔を温度25℃且つ湿度50%~70%の恒温加湿雰囲気下で3日間放置した後の当該剥離面の明度L*値との差が1.5以内であることを特徴とする。ここでいう、銅箔の剥離面とは、銅箔のキャリアを剥離した側の面のことである。以降も銅箔のキャリアを剥離した側の面を剥離面と称す。そして、このキャリア付銅箔は、「キャリア」、「剥離層」、「銅箔」の順に積層した層構成を備える。よって、以下において、「明度L*値」、「キャリア」、「剥離層」、「銅箔」に関して順に述べる。
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、従来技術である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、キャリアを剥離した後の銅箔の表面が優れた酸化防止特性を備えるため、プリント配線板に求められるファインパターン回路の形成に好適である。さらに、本件発明に係るプリント配線板は、銅張積層板の段階でキャリアを剥離して大気中で3日以上に放置しても、その表面にある銅箔層へのレーザー孔あけや、パターン形成時のエッチング処理におけるバラツキが少ない。ゆえに、本件発明に係るプリント配線板は、要求範囲に応じた孔径の形成や、回路幅の回路形成が可能となる。また、回路が著しく細線化して断線が発生する可能性も回避することができる。
実施試料A~E及び比較試料の評価結果、実施試料A~E及び比較試料作製時の条件(無機剥離層又は有機剥離層を形成する溶液、金属分散層を形成する溶液)を表1にまとめて示す。当該表1に示す結果を参照しつつ、本件発明の実施例と比較例についての対比を行う。
キャリア剥離直後の銅箔の剥離面の明度L*値は、実施試料A~Eがいずれも50以下であったのに対し、比較試料は、52.7であった。
3日目までにおける明度L*値と0日目における明度L*値との差の最大値は、実施試料A~Eが、いずれも1.5以内であったのに対し、比較試料は、5.0であった。
キャリア剥離後の銅箔の剥離面の明度L*値のバラツキ(標準偏差:σ)は、実施試料A~Eがいずれも1以下であったのに対し、比較試料は、1.8であった。
Claims (10)
- キャリア、剥離層、銅箔の順に積層されたキャリア付銅箔であって、
当該キャリア付銅箔のキャリア剥離直後の銅箔の剥離面の明度L*値と、キャリア剥離後の銅箔を温度25℃且つ湿度50%~70%の恒温加湿雰囲気下で3日間放置した後の剥離面の明度L*値との差が1.5以内であることを特徴とするキャリア付銅箔。 - 前記キャリア剥離後の銅箔を、温度25℃且つ湿度50%~70%の恒温加湿雰囲気下で3日間放置した後、当該銅箔の幅方向10cm間隔で複数箇所について測定した当該銅箔の剥離面の明度L*値の標準偏差σが1以下である請求項1に記載のキャリア付銅箔。
- 前記キャリアを剥離した直後の、前記銅箔の剥離面の明度L*値が50以下である請求項1又は請求項2に記載のキャリア付銅箔。
- 前記剥離層が、無機成分を用いた無機剥離層、又は、有機成分を用いた有機剥離層である請求項1~請求項3のいずれかに記載のキャリア付銅箔。
- 前記剥離層が、前記無機剥離層又は前記有機剥離層と前記銅箔の間に、さらに有機成分を含む金属分散層を備える請求項4に記載のキャリア付銅箔。
- 前記有機成分は、窒素含有有機化合物、硫黄含有有機化合物、及びカルボン酸の中から選択される1種又は2種以上からなるものである請求項4又は請求項5に記載のキャリア付銅箔。
- 前記金属分散層は、ニッケル及び/又はコバルトを主成分として含むものである請求項5に記載のキャリア付銅箔。
- 請求項1~請求項7のいずれか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A、B、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。
A:キャリアの表面に剥離層として無機剥離層又は有機剥離層を形成する工程。
B:当該無機剥離層又は有機剥離層の表面に剥離層として有機成分を含む金属分散層を形成する工程。
C:当該金属分散層の表面に銅箔を形成する工程。 - 請求項1~請求項7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7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。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580015880.2A CN106133200B (zh) | 2014-04-02 | 2015-04-02 | 带载体的铜箔、带载体的铜箔的制造方法、用带载体的铜箔得到的覆铜层压板以及印刷线路板 |
KR1020167023855A KR101832806B1 (ko) | 2014-04-02 | 2015-04-02 | 캐리어가 구비된 구리박, 캐리어가 구비된 구리박의 제조 방법, 캐리어가 구비된 구리박을 사용하여 얻어지는 구리 클래드 적층판 및 프린트 배선판 |
MYPI2016703415A MY190559A (en) | 2014-04-02 | 2015-04-02 | Copper foil provided with carrier, method of manufacturing copper foil provided with carrier, and copper clad laminate manufactured by using copper foil provided with carrier and manufacturing method of printed wiring board |
JP2015517506A JP6054523B2 (ja) | 2014-04-02 | 2015-04-02 | 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の製造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-076392 | 2014-04-02 | ||
JP2014076392 | 2014-04-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015152380A1 true WO2015152380A1 (ja) | 2015-10-08 |
Family
ID=54240688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/060492 WO2015152380A1 (ja) | 2014-04-02 | 2015-04-02 | 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 |
Country Status (6)
Country | Link |
---|---|
JP (1) | JP6054523B2 (ja) |
KR (1) | KR101832806B1 (ja) |
CN (1) | CN106133200B (ja) |
MY (1) | MY190559A (ja) |
TW (1) | TWI592066B (ja) |
WO (1) | WO2015152380A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017073121A1 (ja) * | 2015-10-28 | 2017-05-04 | 三井金属鉱業株式会社 | プリント配線板の製造方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102137068B1 (ko) * | 2019-11-27 | 2020-07-23 | 와이엠티 주식회사 | 캐리어박 부착 금속박, 이의 제조방법 및 이를 포함하는 적층체 |
CN112361731A (zh) * | 2020-11-05 | 2021-02-12 | 陕西汉和新材料科技有限公司 | 一种防止铜箔氧化的方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001140090A (ja) * | 1999-11-11 | 2001-05-22 | Mitsui Mining & Smelting Co Ltd | キャリア箔付電解銅箔及びその製造方法 |
JP2014005545A (ja) * | 2013-08-30 | 2014-01-16 | Mitsui Mining & Smelting Co Ltd | キャリア箔付電解銅箔、キャリア箔付電解銅箔の製造方法及びそのキャリア箔付電解銅箔を用いて得られる銅張積層板 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05228130A (ja) | 1992-02-19 | 1993-09-07 | Otax Kk | 血液監視用携帯装置 |
JP3690962B2 (ja) | 2000-04-26 | 2005-08-31 | 三井金属鉱業株式会社 | キャリア箔付電解銅箔及びそのキャリア箔付電解銅箔の製造方法並びに銅張積層板 |
JP3973197B2 (ja) | 2001-12-20 | 2007-09-12 | 三井金属鉱業株式会社 | キャリア箔付電解銅箔及びその製造方法 |
CN1984527B (zh) | 2005-12-15 | 2010-12-01 | 古河电气工业株式会社 | 带载体的极薄铜箔及印刷电路基板 |
TWI402009B (zh) * | 2007-12-10 | 2013-07-11 | Furukawa Electric Co Ltd | Surface treatment of copper foil and circuit substrate |
CN102574365B (zh) * | 2009-07-24 | 2015-11-25 | 三菱瓦斯化学株式会社 | 树脂复合电解铜箔、覆铜层压板和印刷线路板 |
-
2015
- 2015-04-02 MY MYPI2016703415A patent/MY190559A/en unknown
- 2015-04-02 TW TW104111075A patent/TWI592066B/zh active
- 2015-04-02 JP JP2015517506A patent/JP6054523B2/ja active Active
- 2015-04-02 KR KR1020167023855A patent/KR101832806B1/ko active IP Right Grant
- 2015-04-02 CN CN201580015880.2A patent/CN106133200B/zh active Active
- 2015-04-02 WO PCT/JP2015/060492 patent/WO2015152380A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001140090A (ja) * | 1999-11-11 | 2001-05-22 | Mitsui Mining & Smelting Co Ltd | キャリア箔付電解銅箔及びその製造方法 |
JP2014005545A (ja) * | 2013-08-30 | 2014-01-16 | Mitsui Mining & Smelting Co Ltd | キャリア箔付電解銅箔、キャリア箔付電解銅箔の製造方法及びそのキャリア箔付電解銅箔を用いて得られる銅張積層板 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017073121A1 (ja) * | 2015-10-28 | 2017-05-04 | 三井金属鉱業株式会社 | プリント配線板の製造方法 |
JP6131395B1 (ja) * | 2015-10-28 | 2017-05-17 | 三井金属鉱業株式会社 | プリント配線板の製造方法 |
KR20180041167A (ko) * | 2015-10-28 | 2018-04-23 | 미쓰이금속광업주식회사 | 프린트 배선판의 제조 방법 |
CN108029202A (zh) * | 2015-10-28 | 2018-05-11 | 三井金属矿业株式会社 | 印刷电路板的制造方法 |
TWI626873B (zh) * | 2015-10-28 | 2018-06-11 | Mitsui Mining & Smelting Co., Ltd. | 印刷配線板之製造方法 |
KR102039844B1 (ko) | 2015-10-28 | 2019-11-01 | 미쓰이금속광업주식회사 | 프린트 배선판의 제조 방법 |
CN108029202B (zh) * | 2015-10-28 | 2020-01-21 | 三井金属矿业株式会社 | 印刷电路板的制造方法 |
Also Published As
Publication number | Publication date |
---|---|
KR101832806B1 (ko) | 2018-02-28 |
JP6054523B2 (ja) | 2016-12-27 |
CN106133200B (zh) | 2018-04-27 |
MY190559A (en) | 2022-04-27 |
CN106133200A (zh) | 2016-11-16 |
TW201603659A (zh) | 2016-01-16 |
TWI592066B (zh) | 2017-07-11 |
JPWO2015152380A1 (ja) | 2017-04-13 |
KR20160114696A (ko) | 2016-10-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7691487B2 (en) | Electrodeposited copper foil with carrier foil | |
TWI582275B (zh) | 具有載體之銅箔、具有載體之銅箔之製造方法、使用具有載體之銅箔所得之貼銅積層板及印刷配線板 | |
JP2005076091A (ja) | キャリア付き極薄銅箔の製造方法、及びその製造方法で製造されたキャリア付き極薄銅箔 | |
WO2014006781A1 (ja) | 極薄銅箔及びその製造方法、並びに極薄銅層 | |
JP5859155B1 (ja) | 複合金属箔及びその製造方法並びにプリント配線板 | |
JP6111017B2 (ja) | プリント配線板用銅箔及びそれを用いた積層体、プリント配線板及び電子部品 | |
JP2007186797A (ja) | キャリア付き極薄銅箔の製造方法、及び該製造方法で製造された極薄銅箔、該極薄銅箔を使用したプリント配線板、多層プリント配線板、チップオンフィルム用配線基板 | |
WO2015080052A1 (ja) | キャリア箔付銅箔及び銅張積層板 | |
JP6054523B2 (ja) | 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の製造方法 | |
WO2011086972A1 (ja) | 電子回路及びその形成方法並びに電子回路形成用銅張積層板 | |
WO2017141983A1 (ja) | プリント配線板の製造方法 | |
CN108029202A (zh) | 印刷电路板的制造方法 | |
JP2005288856A (ja) | キャリア箔付電解銅箔及びその製造方法並びにそのキャリア箔付電解銅箔を用いた銅張積層板 | |
JP3812834B2 (ja) | キャリア箔付電解銅箔並びにその製造方法及びそのキャリア箔付電解銅箔を用いた銅張積層板 | |
JP2009081396A (ja) | プリント配線板用銅箔及びその表面処理方法 | |
JP6140480B2 (ja) | キャリア付銅箔、キャリア付銅箔の製造方法、プリント配線板、プリント回路板、銅張積層板、及び、プリント配線板の製造方法 | |
JPWO2011105318A1 (ja) | 印刷回路基板用銅箔及び印刷回路基板用銅張積層板 | |
JP2012057231A (ja) | プリント基板用圧延銅箔、及びその製造方法 | |
JP5074822B2 (ja) | 表面処理銅箔 | |
TWI853007B (zh) | 印刷配線板用金屬箔、附載體金屬箔及覆金屬層積板、以及使用其等的印刷配線板的製造方法 | |
JP6246486B2 (ja) | キャリア付銅箔及びその製造方法、銅張積層板の製造方法及びプリント配線板の製造方法 | |
JP6176948B2 (ja) | キャリア付銅箔、キャリア付銅箔の製造方法、プリント回路板の製造方法、銅張積層板の製造方法、及び、プリント配線板の製造方法 | |
JP6329727B2 (ja) | キャリア付銅箔、キャリア付銅箔の製造方法、プリント配線板、プリント回路板、銅張積層板、及び、プリント配線板の製造方法 | |
JP2011012297A (ja) | プリント配線板用銅箔 | |
JP6336142B2 (ja) | キャリア付銅箔、キャリア付銅箔の製造方法、プリント回路板の製造方法、銅張積層板の製造方法、及び、プリント配線板の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2015517506 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15773406 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20167023855 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase | ||
122 | Ep: pct application non-entry in european phase |
Ref document number: 15773406 Country of ref document: EP Kind code of ref document: A1 |