WO2020071287A1 - 銅張積層板、配線板、及び樹脂付き銅箔 - Google Patents
銅張積層板、配線板、及び樹脂付き銅箔Info
- Publication number
- WO2020071287A1 WO2020071287A1 PCT/JP2019/038309 JP2019038309W WO2020071287A1 WO 2020071287 A1 WO2020071287 A1 WO 2020071287A1 JP 2019038309 W JP2019038309 W JP 2019038309W WO 2020071287 A1 WO2020071287 A1 WO 2020071287A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- copper
- copper foil
- group
- clad laminate
- insulating layer
- Prior art date
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- 0 *BOc(c(*)c1*)c(*)c(*)c1-c(c(*)c1*)c(*)c(*)c1O** Chemical compound *BOc(c(*)c1*)c(*)c(*)c1-c(c(*)c1*)c(*)c(*)c1O** 0.000 description 1
Images
Classifications
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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
- H05K1/05—Insulated conductive substrates, e.g. insulated metal substrate
- H05K1/056—Insulated conductive substrates, e.g. insulated metal substrate the metal substrate being covered by an organic insulating layer
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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
- H05K1/0313—Organic insulating material
- H05K1/032—Organic insulating material consisting of one material
- H05K1/0326—Organic insulating material consisting of one material containing O
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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
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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
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
- C08G65/48—Polymers modified by chemical after-treatment
- C08G65/485—Polyphenylene oxides
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/227—Measuring photoelectric effect, e.g. photoelectron emission microscopy [PEEM]
- G01N23/2273—Measuring photoelectron spectrum, e.g. electron spectroscopy for chemical analysis [ESCA] or X-ray photoelectron spectroscopy [XPS]
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0017—Etching of the substrate by chemical or physical means
- H05K3/002—Etching of the substrate by chemical or physical means by liquid chemical etching
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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
- B32B2311/00—Metals, their alloys or their compounds
- B32B2311/12—Copper
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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
- B32B2371/00—Polyethers, e.g. PEEK, i.e. polyether-etherketone; PEK, i.e. polyetherketone
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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
- B32B2457/00—Electrical equipment
- B32B2457/08—PCBs, i.e. printed circuit boards
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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
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0166—Polymeric layer used for special processing, e.g. resist for etching insulating material or photoresist used as a mask during plasma etching
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0335—Layered conductors or foils
- H05K2201/0355—Metal foils
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- 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
Definitions
- the present invention relates to a copper-clad laminate, a wiring board, and a copper foil with resin.
- Patent Document 1 As a metal-clad laminate obtained using such a resin composition containing polyphenylene ether as a substrate material, for example, a metal-clad laminate described in Patent Document 1 can be mentioned.
- Patent Document 1 includes a cured insulating layer containing a polyphenylene ether compound, a metal layer bonded to the insulating layer, and an intermediate layer containing a silane compound interposed between the insulating layer and the metal layer.
- a metal-clad laminate in which the metal layer has a bonding surface bonded to the insulating layer via the intermediate layer, and the ten-point average roughness Rz of the bonding surface is 0.5 ⁇ m or more and 4 ⁇ m or less.
- Patent Literature 1 it is disclosed that a metal-clad laminate that can produce a printed wiring board with reduced loss during signal transmission can be obtained.
- wiring boards such as printed wiring boards are required to further increase the signal transmission speed in order to cope with high frequencies.
- wiring boards used in various electronic devices are also required to be hardly affected by changes in the external environment and the like. For example, high heat resistance is required to prevent delamination during heating.
- various studies have been made on copper-clad laminates, wiring boards, and copper foil with resin.
- the present invention has been made in view of such circumstances, and provides a copper-clad laminate and a resin-coated copper foil capable of suitably producing a wiring board having a high signal transmission speed and high heat resistance.
- the purpose is to do.
- Another object of the present invention is to provide a wiring board having a high signal transmission speed and high heat resistance.
- One aspect of the present invention is a copper-clad laminate including an insulating layer and a copper foil in contact with at least one surface of the insulating layer, wherein the insulating layer is a carbon-carbon unsaturated double Including a cured product of a resin composition containing a modified polyphenylene ether compound terminal-modified by a substituent having a bond, the copper-clad laminate is subjected to etching treatment with a copper chloride solution to expose the insulating layer on the exposed surface.
- the amount of chromium element measured by X-ray photoelectron spectroscopy is 7.5 atomic% or less based on the total amount of elements measured by X-ray photoelectron spectroscopy, and the surface roughness of the exposed surface is 10% or less. It is a copper-clad laminate having a point average roughness of 2.0 ⁇ m or less.
- the substituent is preferably a group represented by the following formula (1) or the following formula (2).
- R 1 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms
- R 2 represents an alkylene group having 1 to 10 carbon atoms or a direct bond.
- R 3 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.
- Another aspect of the present invention is a resin-coated copper foil including a resin layer and a copper foil present in contact with at least one surface of the resin layer, wherein the resin layer is formed of carbon-carbon.
- FIG. 1 is a schematic cross-sectional view illustrating an example of the copper-clad laminate according to the embodiment of the present invention.
- FIG. 2 is a schematic sectional view showing an example of the prepreg according to the embodiment of the present invention.
- FIG. 3 is a schematic sectional view showing an example of the wiring board according to the embodiment of the present invention.
- FIG. 4 is a schematic sectional view showing another example of the wiring board according to the embodiment of the present invention.
- FIG. 5 is a schematic cross-sectional view showing an example of the copper foil with resin according to the embodiment of the present invention.
- a wiring board obtained by forming a wiring by partially removing a copper foil provided in a copper-clad laminate another insulating layer is formed on the surface of the insulating layer exposed by the wiring formation.
- no wiring made of copper foil exists between these insulating layers. From this, it was thought that the delamination between the insulating layers was not affected by the copper foil provided on the copper-clad laminate used to obtain the wiring board.
- the present inventors have conducted various studies on the effects of the remaining metal components and surface roughness.As a result, delamination between the insulating layers was performed by etching the copper-clad laminate with a copper chloride solution. It has been found that the likelihood of occurrence varies depending on the amount of chromium element present on the exposed surface where the insulating layer is exposed and the surface roughness.
- the present inventors have performed an etching process on the copper-clad laminate with a copper chloride solution, and the exposed surface where the insulating layer is exposed has a predetermined chromium element amount and a predetermined surface roughness. It has been found that a copper-clad laminate can suppress the occurrence of delamination in a wiring board obtained using the same. That is, instead of specifying the copper foil removal conditions (etching conditions) and the composition of the copper foil, the amount of chromium element and the surface roughness of the exposed surface where the insulating layer is exposed by the predetermined etching process are set to predetermined values. It has been found that a copper-clad laminate as described below can suppress the occurrence of delamination in a wiring board obtained by using the same. From these facts, the following invention has been conceived.
- a copper-clad laminate according to an embodiment of the present invention includes an insulating layer and a copper foil that is in contact with at least one surface of the insulating layer.
- the copper-clad laminate 11 includes an insulating layer 12 and a copper foil 13 arranged so as to be in contact with both surfaces thereof.
- the copper clad laminate may be provided with a copper foil in contact with only one surface of the insulating layer.
- FIG. 1 is a schematic sectional view showing the configuration of the copper-clad laminate 11 according to the present embodiment.
- the copper-clad laminate 11 includes a cured product of a resin composition in which the insulating layer 12 contains a modified polyphenylene ether compound terminal-modified with a substituent having a carbon-carbon unsaturated double bond. Further, the copper clad laminate 11 is subjected to an X-ray photoelectron spectroscopy (XPS) on the exposed surface where the insulating layer 12 is exposed by etching the copper clad laminate 11 with a copper chloride solution. ) Is 7.5 atomic% or less with respect to the total amount of elements measured by XPS.
- the copper-clad laminate 11 has a surface roughness of the exposed surface of not more than 2.0 ⁇ m in ten-point average roughness.
- the cured product contained in the insulating layer is a cured product obtained by curing a resin composition containing the modified polyphenylene ether compound. It is thought that the property can be improved.
- the present inventors have found that delamination occurring between layers is affected by the originally existing copper foil even when no copper foil exists between them. From this, it is considered that an etching residue derived from the copper foil exists on the exposed surface where the insulating layer is exposed by the etching process. The present inventors have guessed that if a compound containing a chromium element is present as this etching residue, delamination is likely to occur when heated.
- the amount of chromium element present on the exposed surface is small as described above, the amount of chromium element also present on the surface of the insulating layer existing between wirings in the wiring board manufactured from the copper-clad laminate, that is, It is considered that the amount of the compound containing chromium element is small. From this, it is considered that the copper-clad laminate has high heat resistance that can sufficiently suppress delamination even when heated.
- the copper-clad laminate has high heat resistance.
- the cured product contained in the insulating layer is a cured product obtained by curing the resin composition containing the modified polyphenylene ether compound, the cured product has a low dielectric constant and a low dielectric loss tangent. From this, it is considered that this wiring board can reduce the transmission loss due to the dielectric around the wiring and can increase the signal transmission speed.
- the smoothness of the contact surface between the copper foil and the insulating layer is also high. From this, it is considered that the wiring board obtained from the copper-clad laminate has high smoothness of the contact surface between the wiring and the insulating layer. It is considered that the signal transmitted through the wiring is concentrated near the surface of the conductor forming the wiring due to the skin effect. This effect is considered to be more remarkable as the signal transmitted through the wiring has a higher frequency. Then, when the contact surface between the wiring and the insulating layer becomes smooth, the signal flowing through the wiring flows near the surface having high smoothness, so that the transmission distance is shortened. From this, it is considered that this wiring board can reduce the transmission loss caused by the conductor forming the wiring and can increase the signal transmission speed.
- this wiring board can reduce both the transmission loss caused by the conductor forming the wiring and the transmission loss caused by the dielectric around the wiring, and can increase the signal transmission speed.
- the copper-clad laminate is a copper-clad laminate capable of suitably producing a wiring board having a high signal transmission speed and high heat resistance.
- the resin composition used in the present embodiment contains the modified polyphenylene ether compound.
- modified polyphenylene ether compound used in the present embodiment is not particularly limited as long as it is a polyphenylene ether terminal-modified with a substituent having a carbon-carbon unsaturated double bond.
- the substituent having a carbon-carbon unsaturated double bond is not particularly limited.
- Examples of the substituent include a substituent represented by the following formula (1) or the following formula (2).
- R 1 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms
- R 2 represents an alkylene group having 1 to 10 carbon atoms or a direct bond.
- R 3 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.
- Examples of the substituent represented by the formula (1) include a vinylbenzyl group (ethenylbenzyl group) such as a p-ethenylbenzyl group and an m-ethenylbenzyl group.
- Examples of the substituent represented by the formula (2) include an acrylate group and a methacrylate group.
- the modified polyphenylene ether has a polyphenylene ether chain in the molecule, and preferably has, for example, a repeating unit represented by the following formula (3) in the molecule.
- R 4 to R 7 are each independent. That is, R 4 to R 7 may be the same or different groups.
- R 4 to R 7 each represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, a formyl group, an alkylcarbonyl group, an alkenylcarbonyl group, or an alkynylcarbonyl group. Among them, a hydrogen atom and an alkyl group are preferable.
- R 4 to R 7 specific examples of the functional groups include the following.
- the alkyl group is not particularly limited, but is preferably, for example, an alkyl group having 1 to 18 carbon atoms, more preferably an alkyl group having 1 to 10 carbon atoms. Specific examples include a methyl group, an ethyl group, a propyl group, a hexyl group, and a decyl group.
- the alkenyl group is not particularly limited, but is preferably, for example, an alkenyl group having 2 to 18 carbon atoms, more preferably an alkenyl group having 2 to 10 carbon atoms. Specific examples include a vinyl group, an allyl group, and a 3-butenyl group.
- the alkynyl group is not particularly limited, but is preferably, for example, an alkynyl group having 2 to 18 carbon atoms, more preferably an alkynyl group having 2 to 10 carbon atoms. Specific examples include an ethynyl group and a prop-2-yn-1-yl group (propargyl group).
- the alkylcarbonyl group is not particularly limited as long as it is a carbonyl group substituted with an alkyl group.
- an alkylcarbonyl group having 2 to 18 carbon atoms is preferable, and an alkylcarbonyl group having 2 to 10 carbon atoms is more preferable.
- Specific examples include an acetyl group, a propionyl group, a butyryl group, an isobutyryl group, a pivaloyl group, a hexanoyl group, an octanoyl group, and a cyclohexylcarbonyl group.
- the alkenylcarbonyl group is not particularly limited as long as it is a carbonyl group substituted with an alkenyl group.
- an alkenylcarbonyl group having 3 to 18 carbon atoms is preferable, and an alkenylcarbonyl group having 3 to 10 carbon atoms is more preferable.
- Specific examples include an acryloyl group, a methacryloyl group, and a crotonoyl group.
- the alkynylcarbonyl group is not particularly limited as long as it is a carbonyl group substituted with an alkynyl group.
- an alkynylcarbonyl group having 3 to 18 carbon atoms is preferable, and an alkynylcarbonyl group having 3 to 10 carbon atoms is more preferable.
- a propioloyl group and the like can be mentioned.
- the weight average molecular weight (Mw) of the modified polyphenylene ether compound used in the present embodiment is not particularly limited. Specifically, it is preferably from 500 to 5,000, more preferably from 800 to 4,000, and still more preferably from 1,000 to 3,000.
- the weight average molecular weight may be a value measured by a general molecular weight measuring method, and specifically, a value measured using gel permeation chromatography (GPC) and the like can be mentioned.
- GPC gel permeation chromatography
- m is a value such that the weight average molecular weight of the modified polyphenylene ether compound falls within such a range. It is preferred that Specifically, m is preferably 1 to 50.
- the polyphenylene ether has excellent low dielectric properties and is not only excellent in heat resistance of the cured product but also excellent in moldability. Become. This is thought to be due to the following.
- the weight average molecular weight of the ordinary polyphenylene ether is within such a range, the heat resistance of the cured product tends to decrease because the molecular weight is relatively low.
- the modified polyphenylene ether compound has an unsaturated double bond at a terminal, it is considered that a cured product having sufficiently high heat resistance can be obtained.
- the modified polyphenylene ether compound When the weight average molecular weight of the modified polyphenylene ether compound is within such a range, the modified polyphenylene ether compound has a relatively low molecular weight, and thus is considered to be excellent in moldability. Therefore, it is considered that such a modified polyphenylene ether compound is not only excellent in heat resistance of the cured product but also excellent in moldability.
- the average number of the substituents (the number of terminal functional groups) at the molecular end per one molecule of the modified polyphenylene ether is not particularly limited. Specifically, the number is preferably 1 to 5, more preferably 1 to 3, and even more preferably 1.5 to 3. If the number of the terminal functional groups is too small, the cured product tends to be insufficient in heat resistance. Further, when the number of terminal functional groups is too large, the reactivity becomes too high, and for example, problems such as a decrease in storage stability of the resin composition and a decrease in fluidity of the resin composition may occur. .
- the number of terminal functional groups of the modified polyphenylene ether compound includes a numerical value representing the average value of the substituents per molecule of all the modified polyphenylene ether compounds present in 1 mol of the modified polyphenylene ether compound.
- This number of terminal functional groups can be measured, for example, by measuring the number of hydroxyl groups remaining in the obtained modified polyphenylene ether compound and calculating the decrease from the number of hydroxyl groups of the polyphenylene ether before modification. The decrease from the number of hydroxyl groups of the polyphenylene ether before modification is the number of terminal functional groups.
- a method for measuring the number of hydroxyl groups remaining in the modified polyphenylene ether compound is as follows: a quaternary ammonium salt (tetraethylammonium hydroxide) associated with a hydroxyl group is added to a solution of the modified polyphenylene ether compound, and the UV absorbance of the mixed solution is measured. By doing so.
- a quaternary ammonium salt tetraethylammonium hydroxide
- the intrinsic viscosity of the modified polyphenylene ether compound used in the present embodiment is not particularly limited. Specifically, it is preferably from 0.03 to 0.12 dl / g, more preferably from 0.04 to 0.11 dl / g, and further preferably from 0.06 to 0.095 dl / g. preferable. If the intrinsic viscosity is too low, the molecular weight tends to be low, and it tends to be difficult to obtain low dielectric properties such as a low dielectric constant and a low dielectric loss tangent. On the other hand, if the intrinsic viscosity is too high, the viscosity is high, sufficient fluidity cannot be obtained, and the moldability of the cured product tends to decrease. Therefore, when the intrinsic viscosity of the modified polyphenylene ether compound is within the above range, excellent heat resistance and moldability of the cured product can be realized.
- the intrinsic viscosity here is an intrinsic viscosity measured in methylene chloride at 25 ° C. More specifically, for example, a 0.18 g / 45 ml methylene chloride solution (liquid temperature 25 ° C.) is measured using a viscometer. And the like.
- a viscometer for example, AVS500 ⁇ Visco ⁇ System manufactured by Schott and the like can be mentioned.
- modified polyphenylene ether compound examples include a modified polyphenylene ether compound represented by the following formula (4) and a modified polyphenylene ether compound represented by the following formula (5). Further, as the modified polyphenylene ether compound, these modified polyphenylene ether compounds may be used alone, or two kinds of modified polyphenylene ether compounds may be used in combination.
- R 8 to R 15 and R 16 to R 23 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, a formyl group, an alkylcarbonyl group, an alkenylcarbonyl.
- X 1 and X 2 each independently represent a substituent having a carbon-carbon unsaturated double bond.
- a and B each represent a repeating unit represented by the following formula (6) and the following formula (7).
- Y represents a linear, branched, or cyclic hydrocarbon having 20 or less carbon atoms.
- R 24 to R 27 and R 28 to R 31 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, a formyl group, an alkylcarbonyl group, an alkenylcarbonyl group, or an alkynylcarbonyl group.
- R 8 to R 15 and R 16 to R 23 are each independent as described above. That is, R 8 to R 15 and R 16 to R 23 may be the same group or different groups.
- R 8 to R 15 and R 16 to R 23 each represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, a formyl group, an alkylcarbonyl group, an alkenylcarbonyl group, or an alkynylcarbonyl group.
- a hydrogen atom and an alkyl group are preferable.
- s and t preferably indicate 0 to 20, respectively, as described above. It is preferable that s and t indicate numerical values such that the sum of s and t is 1 to 30. Therefore, it is more preferable that s represents 0 to 20, t represents 0 to 20, and the sum of s and t represents 1 to 30.
- R 24 to R 27 and R 28 to R 31 are independent of each other. That is, R 24 to R 27 and R 28 to R 31 may be the same or different groups.
- R 24 to R 27 and R 28 to R 31 each represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, a formyl group, an alkylcarbonyl group, an alkenylcarbonyl group, or an alkynylcarbonyl group. Among them, a hydrogen atom and an alkyl group are preferable.
- R 8 to R 31 are the same as R 5 to R 8 in the above formula (3).
- Y is a linear, branched or cyclic hydrocarbon having 20 or less carbon atoms as described above.
- Examples of Y include a group represented by the following formula (8).
- R 32 and R 33 each independently represent a hydrogen atom or an alkyl group.
- the alkyl group include a methyl group.
- the group represented by the formula (8) include a methylene group, a methylmethylene group, and a dimethylmethylene group. Among them, a dimethylmethylene group is preferable.
- modified polyphenylene ether compound represented by the formula (4) include, for example, a modified polyphenylene ether compound represented by the following formula (9).
- modified polyphenylene ether compound represented by the formula (5) include, for example, a modified polyphenylene ether compound represented by the following formula (10) and a modified polyphenylene ether represented by the following formula (11) And the like.
- s and t are the same as s and t in the formulas (6) and (7).
- R 1 and R 2 are the same as R 1 and R 2 in the formula (1).
- Y is the same as Y in the above (5).
- R 3 is the same as R 3 in the above formula (2).
- the method for synthesizing the modified polyphenylene ether compound used in the present embodiment is not particularly limited as long as the modified polyphenylene ether compound terminal-modified with a substituent having a carbon-carbon unsaturated double bond can be synthesized. Specific examples include a method of reacting a compound in which a substituent having a carbon-carbon unsaturated double bond and a halogen atom are bonded to polyphenylene ether.
- Examples of the compound in which a substituent having a carbon-carbon unsaturated double bond is bonded to a halogen atom include, for example, a compound in which the substituent represented by the above formulas (2) and (3) is bonded to a halogen atom. And the like.
- Specific examples of the halogen atom include a chlorine atom, a bromine atom, an iodine atom, and a fluorine atom, and among them, a chlorine atom is preferable.
- Specific examples of the compound in which a substituent having a carbon-carbon unsaturated double bond is bonded to a halogen atom include p-chloromethylstyrene and m-chloromethylstyrene.
- the raw material polyphenylene ether is not particularly limited as long as it can finally synthesize a predetermined modified polyphenylene ether compound.
- a polyphenylene ether such as polyphenylene ether or poly (2,6-dimethyl-1,4-phenylene oxide) comprising 2,6-dimethylphenol and at least one of bifunctional phenol and trifunctional phenol is used. And the like as a main component.
- the bifunctional phenol is a phenol compound having two phenolic hydroxyl groups in a molecule, for example, tetramethylbisphenol A and the like.
- the trifunctional phenol is a phenol compound having three phenolic hydroxyl groups in a molecule.
- the method described above can be used as a method for synthesizing the modified polyphenylene ether compound. Specifically, the above-mentioned polyphenylene ether and a compound in which a substituent having a carbon-carbon unsaturated double bond is bonded to a halogen atom are dissolved in a solvent and stirred. By doing so, the polyphenylene ether reacts with the compound in which the substituent having a carbon-carbon unsaturated double bond is bonded to a halogen atom, and the modified polyphenylene ether compound used in the present embodiment is obtained.
- the reaction is preferably performed in the presence of an alkali metal hydroxide. By doing so, it is believed that this reaction proceeds favorably. This is presumably because the alkali metal hydroxide functions as a dehydrohalogenating agent, specifically, a dehydrochlorinating agent. That is, an alkali metal hydroxide desorbs hydrogen halide from a compound in which a phenol group of polyphenylene ether, a substituent having a carbon-carbon unsaturated double bond, and a halogen atom are bonded, and so on. Thus, it is considered that a substituent having a carbon-carbon unsaturated double bond is bonded to the oxygen atom of the phenol group instead of the hydrogen atom of the phenol group of the polyphenylene ether.
- a dehydrohalogenating agent specifically, a dehydrochlorinating agent. That is, an alkali metal hydroxide desorbs hydrogen halide from a compound in which a phenol group of polyphenylene ether,
- the alkali metal hydroxide is not particularly limited as long as it can function as a dehalogenating agent, and examples thereof include sodium hydroxide.
- the alkali metal hydroxide is usually used in the form of an aqueous solution, and specifically, is used as an aqueous sodium hydroxide solution.
- reaction conditions such as the reaction time and the reaction temperature also differ depending on the compound in which the substituent having a carbon-carbon unsaturated double bond is bonded to a halogen atom, etc., and may be any conditions under which the above-described reaction suitably proceeds.
- the reaction temperature is preferably from room temperature to 100 ° C., more preferably from 30 to 100 ° C.
- reaction time is preferably 0.5 to 20 hours, more preferably 0.5 to 10 hours.
- the solvent used in the reaction can dissolve polyphenylene ether and a compound in which a substituent having a carbon-carbon unsaturated double bond is bonded to a halogen atom, and polyphenylene ether and a carbon-carbon unsaturated double bond can be dissolved.
- the above reaction is preferably carried out in the presence of not only an alkali metal hydroxide but also a phase transfer catalyst. That is, the above reaction is preferably performed in the presence of an alkali metal hydroxide and a phase transfer catalyst. By doing so, it is considered that the above reaction proceeds more suitably. This is thought to be due to the following.
- the phase transfer catalyst has a function of incorporating an alkali metal hydroxide, and is soluble in both a polar solvent phase such as water and a non-polar solvent phase such as an organic solvent. This is considered to be due to the fact that the catalyst is capable of transporting.
- the aqueous solution of sodium hydroxide is used for the reaction. It is considered that even when the solvent is dropped, the solvent and the aqueous solution of sodium hydroxide are separated, and the sodium hydroxide is hardly transferred to the solvent. In that case, it is considered that the aqueous sodium hydroxide solution added as the alkali metal hydroxide hardly contributes to the promotion of the reaction.
- phase transfer catalyst is not particularly limited, but examples thereof include quaternary ammonium salts such as tetra-n-butylammonium bromide.
- the resin composition used in the present embodiment preferably contains the modified polyphenylene ether compound obtained as described above as the modified polyphenylene ether compound.
- the resin composition may contain a curing agent.
- the resin composition may not contain a curing agent, but preferably contains a curing agent in order to suitably cure the modified polyphenylene ether compound.
- the curing agent is a curing agent that can react with the polyphenylene ether compound to cure the resin composition containing the polyphenylene ether compound.
- the curing agent is not particularly limited as long as it is a curing agent that can cure the resin composition containing the polyphenylene ether compound.
- the curing agent examples include styrene, a styrene derivative, a compound having an acryloyl group in a molecule, a compound having a methacryloyl group in a molecule, a compound having a vinyl group in a molecule, a compound having an allyl group in a molecule, and a molecule.
- examples thereof include a compound having an acenaphthylene structure, a compound having a maleimide group in a molecule, and a compound having an isocyanurate group in a molecule.
- styrene derivative examples include bromostyrene and dibromostyrene.
- the compound having an acryloyl group in the molecule is an acrylate compound.
- the acrylate compound include a monofunctional acrylate compound having one acryloyl group in the molecule and a polyfunctional acrylate compound having two or more acryloyl groups in the molecule.
- the monofunctional acrylate compound include methyl acrylate, ethyl acrylate, propyl acrylate, and butyl acrylate.
- Examples of the polyfunctional acrylate compound include diacrylate compounds such as tricyclodecane dimethanol diacrylate.
- the compound having a methacryloyl group in the molecule is a methacrylate compound.
- the methacrylate compound include a monofunctional methacrylate compound having one methacryloyl group in the molecule and a polyfunctional methacrylate compound having two or more methacryloyl groups in the molecule.
- the monofunctional methacrylate compound include methyl methacrylate, ethyl methacrylate, propyl methacrylate, and butyl methacrylate.
- Examples of the polyfunctional methacrylate compound include dimethacrylate compounds such as tricyclodecane dimethanol dimethacrylate.
- the compound having a vinyl group in the molecule is a vinyl compound.
- the vinyl compound include a monofunctional vinyl compound having one vinyl group in the molecule (monovinyl compound) and a polyfunctional vinyl compound having two or more vinyl groups in the molecule.
- the polyfunctional vinyl compound include divinylbenzene and polybutadiene.
- the compound having an allyl group in the molecule is an allyl compound.
- the allyl compound include a monofunctional allyl compound having one allyl group in the molecule and a polyfunctional allyl compound having two or more allyl groups in the molecule.
- the polyfunctional allyl compound include triallyl isocyanurate compounds such as triallyl isocyanurate (TAIC), diallyl bisphenol compounds, and diallyl phthalate (DAP).
- the compound having an acenaphthylene structure in the molecule is an acenaphthylene compound.
- examples of the acenaphthylene compound include acenaphthylene, alkylacenaphthylenes, halogenated acenaphthylenes, and phenylacenaphthylenes.
- alkyl acenaphthylenes examples include 1-methylacenaphthylene, 3-methylacenaphthylene, 4-methylacenaphthylene, 5-methylacenaphthylene, 1-ethylacenaphthylene, and 3-ethylacena Phthalene, 4-ethylacenaphthylene, 5-ethylacenaphthylene and the like.
- halogenated acenaphthylenes examples include 1-chloroacenaphthylene, 3-chloroacenaphthylene, 4-chloroacenaphthylene, 5-chloroacenaphthylene, 1-bromoacenaphthylene, and 3-bromoacenaphthylene Len, 4-bromoacenaphthylene, 5-bromoacenaphthylene and the like.
- phenylacenaphthylene examples include 1-phenylacenaphthylene, 3-phenylacenaphthylene, 4-phenylacenaphthylene, 5-phenylacenaphthylene and the like.
- the acenaphthylene compound may be a monofunctional acenaphthylene compound having one acenaphthylene structure in the molecule, or a polyfunctional acenaphthylene compound having two or more acenaphthylene structures in the molecule, as described above. .
- the compound having a maleimide group in the molecule is a maleimide compound.
- the maleimide compound include a monofunctional maleimide compound having one maleimide group in a molecule, a polyfunctional maleimide compound having two or more maleimide groups in a molecule, and a modified maleimide compound.
- the modified maleimide compound include a modified maleimide compound in which a part of the molecule is modified with an amine compound, a modified maleimide compound in which a part of the molecule is modified with a silicone compound, and a part of the molecule which is an amine compound. And a modified maleimide compound modified with a silicone compound.
- the compound having an isocyanurate group in the molecule is an isocyanurate compound.
- the isocyanurate compound include a compound further having an alkenyl group in the molecule (alkenyl isocyanurate compound), and examples thereof include trialkenyl isocyanurate compounds such as triallyl isocyanurate (TAIC).
- the curing agent among the above, for example, the polyfunctional acrylate compound, the polyfunctional methacrylate compound, the polyfunctional vinyl compound, the styrene derivative, the allyl compound, the maleimide compound, the acenaphthylene compound, and the isocyanurate compound And the like, and the polyfunctional vinyl compound, the acenaphthylene compound, and the allyl compound are more preferable.
- the polyfunctional vinyl compound divinylbenzene is preferable.
- the allyl compound an allyl isocyanurate compound having two or more allyl groups in a molecule is preferable, and triallyl isocyanurate (TAIC) is more preferable.
- the above curing agents may be used alone or in combination of two or more.
- the weight average molecular weight of the curing agent is not particularly limited, and is, for example, preferably from 100 to 5,000, more preferably from 100 to 4,000, and still more preferably from 100 to 3,000. If the weight average molecular weight of the curing agent is too low, the curing agent may be likely to volatilize from the components of the resin composition. If the weight average molecular weight of the curing agent is too high, the viscosity of the varnish of the resin composition and the melt viscosity during heat molding may be too high. Therefore, when the weight average molecular weight of the curing agent is within such a range, a resin composition having more excellent heat resistance of the cured product can be obtained.
- the resin composition containing the polyphenylene ether compound can be appropriately cured by the reaction with the polyphenylene ether compound.
- the weight average molecular weight may be a value measured by a general molecular weight measuring method, and specifically, a value measured using gel permeation chromatography (GPC) and the like can be mentioned.
- the average number of functional groups (functional groups) per molecule of the curing agent that contributes to the reaction with the polyphenylene ether compound varies depending on the weight average molecular weight of the curing agent. And preferably 2 to 18. If the number of the functional groups is too small, the cured product tends to have insufficient heat resistance. On the other hand, if the number of functional groups is too large, the reactivity becomes too high, and for example, problems such as a decrease in storage stability of the resin composition and a decrease in fluidity of the resin composition may occur.
- the content of the modified polyphenylene ether compound is preferably 30 to 90 parts by mass, more preferably 50 to 90 parts by mass, based on 100 parts by mass of the total of the modified polyphenylene ether compound and the curing agent.
- the content of the curing agent is preferably from 10 to 70 parts by mass, more preferably from 10 to 50 parts by mass, based on 100 parts by mass of the total of the modified polyphenylene ether compound and the curing agent.
- the content ratio of the modified polyphenylene ether compound to the curing agent is preferably from 90:10 to 30:70 by mass, and more preferably from 90:10 to 50:50.
- the resin composition according to the exemplary embodiment may contain components (other components) other than the modified polyphenylene ether compound and the crosslinking agent as needed, as long as the effects of the present invention are not impaired.
- Other components contained in the resin composition according to the present embodiment include, for example, a silane coupling agent, a flame retardant, an initiator, an antifoaming agent, an antioxidant, a heat stabilizer, an antistatic agent, and ultraviolet absorption.
- the composition may further include additives such as an agent, a dye or a pigment, a lubricant, and an inorganic filler.
- the resin composition may contain a thermosetting resin such as an epoxy resin, an unsaturated polyester resin, a thermosetting polyimide resin, a maleimide compound, and a modified maleimide compound.
- a thermosetting resin such as an epoxy resin, an unsaturated polyester resin, a thermosetting polyimide resin, a maleimide compound, and a modified maleimide compound.
- the modified maleimide compound include a maleimide compound in which at least a part of the molecule is modified with a silicone compound, a maleimide compound in which at least a part of the molecule is modified with an amine compound, and the like.
- the resin composition according to the present embodiment may contain a silane coupling agent.
- the silane coupling agent may be contained in the resin composition, or may be contained as a silane coupling agent surface-treated in advance with the inorganic filler contained in the resin composition.
- the silane coupling agent is preferably contained as a silane coupling agent surface-treated in advance with an inorganic filler, and thus contained as a silane coupling agent surface-treated with an inorganic filler in advance.
- the resin composition also contains a silane coupling agent.
- the prepreg may contain a silane coupling agent which has been surface-treated on a fibrous base material in advance.
- the silane coupling agent examples include a silane coupling agent having at least one functional group selected from the group consisting of a vinyl group, a styryl group, a methacryl group, an acrylic group, and a phenylamino group. That is, the silane coupling agent has at least one of a vinyl group, a styryl group, a methacryl group, an acryl group, and a phenylamino group as a reactive functional group, and further has a methoxy group or an ethoxy group. Examples include compounds having a hydrolyzable group.
- silane coupling agent those having a vinyl group include, for example, vinyltriethoxysilane, vinyltrimethoxysilane and the like.
- examples of the silane coupling agent having a styryl group include p-styryltrimethoxysilane and p-styryltriethoxysilane.
- Examples of the silane coupling agent having a methacryl group include 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltriethoxysilane, and 3-methacryloxypropylmethyl. Examples include diethoxysilane and 3-methacryloxypropylethyldiethoxysilane.
- silane coupling agent having an acryl group examples include 3-acryloxypropyltrimethoxysilane and 3-acryloxypropyltriethoxysilane.
- silane coupling agent having a phenylamino group examples include N-phenyl-3-aminopropyltrimethoxysilane and N-phenyl-3-aminopropyltriethoxysilane.
- the resin composition according to the present embodiment may contain a flame retardant, as described above. By containing a flame retardant, the flame retardancy of a cured product of the resin composition can be increased.
- the flame retardant is not particularly limited. Specifically, in the field of using a halogen-based flame retardant such as a brominated flame retardant, for example, ethylenedipentabromobenzene, ethylenebistetrabromoimide, decabromodiphenyloxide, and tetradecabromomelting point having a melting point of 300 ° C. or more are used. Diphenoxybenzene is preferred.
- a phosphate ester-based flame retardant a phosphate ester-based flame retardant, a phosphazene-based flame retardant, a bisdiphenylphosphine oxide-based flame retardant, and a phosphinate-based flame retardant are exemplified.
- Specific examples of the phosphate ester-based flame retardant include a condensed phosphate ester of dixylenyl phosphate.
- Specific examples of the phosphazene-based flame retardant include phenoxyphosphazene.
- the bisdiphenylphosphine oxide-based flame retardant include xylylenebisdiphenylphosphine oxide.
- Specific examples of the phosphinate-based flame retardant include, for example, metal phosphinates of aluminum dialkylphosphinates. As the flame retardant, each exemplified flame retardant may be used alone, or two or more flame retardants may be used in combination.
- the resin composition according to the present embodiment may contain an initiator (reaction initiator). Even if the polyphenylene ether resin composition is composed of the maleimide compound, the modified polyphenylene ether compound, and the crosslinking agent, the curing reaction can proceed. In addition, the curing reaction can proceed with only the modified polyphenylene ether. However, depending on the process conditions, it may be difficult to raise the temperature until curing progresses, so a reaction initiator may be added.
- the reaction initiator is not particularly limited as long as it can promote a curing reaction between the maleimide compound, the modified polyphenylene ether compound, and the crosslinking agent.
- An oxidizing agent such as lonitrile can be used. If necessary, a metal carboxylate can be used in combination. By doing so, the curing reaction can be further accelerated.
- ⁇ , ⁇ ′-bis (t-butylperoxy-m-isopropyl) benzene is preferably used. Since ⁇ , ⁇ '-bis (t-butylperoxy-m-isopropyl) benzene has a relatively high reaction initiation temperature, it suppresses the acceleration of the curing reaction at the time when it is not necessary to cure the prepreg, for example. Thus, the storage stability of the polyphenylene ether resin composition can be prevented from lowering. Further, ⁇ , ⁇ ′-bis (t-butylperoxy-m-isopropyl) benzene has low volatility, so that it does not volatilize during prepreg drying or storage and has good stability.
- the reaction initiator may be used alone or in combination of two or more.
- the resin composition according to the present embodiment may contain a filler such as an inorganic filler.
- a filler such as an inorganic filler.
- the filler include, but are not particularly limited to, those added to the cured product of the resin composition to enhance heat resistance and flame retardancy. Further, by including a filler, heat resistance and flame retardancy can be further improved.
- Specific examples of the filler include silica such as spherical silica, metal oxides such as alumina, titanium oxide and mica, metal hydroxides such as aluminum hydroxide and magnesium hydroxide, talc, aluminum borate, and sulfuric acid. Barium, calcium carbonate, and the like. As the filler, silica, mica, and talc are preferable, and spherical silica is more preferable.
- filler may be used alone, or two or more kinds may be used in combination.
- the filler may be used as it is, or may be one that has been surface-treated with the silane coupling agent.
- its content is preferably from 30 to 270% by mass, more preferably from 50 to 250% by mass, based on the resin composition.
- the copper foil is not particularly limited as long as the exposed surface is as described above when the copper-clad laminate is etched with a copper chloride solution. Specifically, the amount of chromium element measured by XPS on the exposed surface is 7.5 atomic% or less based on the total amount of elements measured by XPS, and the surface roughness of the exposed surface is: There is no particular limitation as long as the copper foil has a ten-point average roughness of 2.0 ⁇ m or less.
- the etching process of the copper-clad laminate when forming the exposed surface is an etching process with a copper chloride solution, and is a process of removing the copper foil.
- this solution is etched at a temperature of 45 ° C. for 90 seconds (for example, when the thickness of the copper foil is 18 ⁇ m), and thereafter, using city water or pure water at room temperature. This is a process in which the copper foil is removed by washing with water.
- the chromium element amount measured by XPS is 7.5 atomic% or less and 7.0 atomic% or less with respect to the total element amount measured by XPS, as described above. Is preferable, and it is more preferable that it is 6.5 atomic% or less. If the amount of the chromium element is too large, the heat resistance tends to decrease, for example, the adhesion between the layers decreases, and the resulting copper-clad laminate tends to undergo delamination when heated. For this reason, the smaller the amount of the chromium element is, the better, but in practice, the limit is about 0.1 atomic%. For this reason, it is preferable that the amount of the chromium element be 0.1 to 7.5 atomic%.
- the XPS can be measured by using general X-ray photoelectron spectroscopy. Specifically, the sample can be measured by irradiating the sample with X-rays under vacuum using PHI $ 5000 Versaprobe manufactured by ULVAC-PHI, Inc.
- a nitrogen element which can be confirmed by XPS is present on the exposed surface.
- the nitrogen element that can be confirmed by XPS means that the amount of nitrogen element is equal to or greater than the detection limit of XPS, specifically, 0.1 atomic% or more.
- the exposed surface preferably has a nitrogen element amount measured by XPS of at least 1.0 atomic%, and more preferably 2.5 atomic% with respect to the total element amount measured by XPS. Is more preferably 3.5 atomic% or more.
- the present inventors have found that when a nitrogen element which can be confirmed by XPS is present on the exposed surface, delamination hardly occurs even when the obtained wiring board is heated. As described above, the present inventors speculated that if a compound containing a chromium element is present as an etching residue, delamination is likely to occur when heated. On the other hand, when a compound containing a nitrogen element is present as an etching residue in an amount that can be confirmed by X-ray photoelectron spectroscopy, the surface of an insulating layer existing between wirings in a wiring board manufactured from the copper-clad laminate is measured. It is considered that a compound containing a certain amount or more of nitrogen element is present also on the top.
- the compound containing the nitrogen element enhances the interlayer adhesion between the insulating layer and the insulating layer, and makes it difficult for delamination to occur.
- This is considered to provide a copper-clad laminate capable of suitably producing a wiring board having higher heat resistance.
- the amount of the nitrogen element is too small, the effect of suppressing the occurrence of delamination due to the presence of the nitrogen element tends to be insufficient.
- the nitrogen element is preferably derived from a nitrogen atom contained in a compound having an amino group, and more preferably derived from a nitrogen atom contained in a silane coupling agent having an amino group.
- the fact that the nitrogen element is derived from a nitrogen atom contained in a compound having an amino group means that the compound containing a nitrogen element, which is present as an etching residue, is a compound having an amino group. It is considered that such a copper foil is specifically a copper foil having a layer treated with a silane coupling agent having an amino group in a molecule as a silane coupling agent layer described later.
- the compound having an amino group that is, the silane coupling agent having an amino group in the molecule, enhances the interlayer adhesion between the insulating layer and the insulating layer, and has the effect of preventing the occurrence of delamination. It is thought to play effectively. From this, it is considered that a copper-clad laminate capable of suitably producing a wiring board having higher heat resistance is obtained.
- chromium (Cr) element and the nitrogen (N) element copper (Cu) element, carbon (C) element, oxygen (O) element, silicon (Si)
- Cu copper
- C carbon
- O oxygen
- Si silicon
- One or more elements selected from elements, nickel (Ni), zinc (Zn), and cobalt (Co) may be present.
- the amount of each of these elements is, for example, preferably from 0 to 90 atomic%, more preferably from 0 to 80 atomic%, and more preferably from 0 to 80 atomic%, based on the total amount of elements measured by XPS. More preferably, it is 70 atomic%.
- the copper foil include a copper foil obtained by subjecting a copper foil base material to various treatments.
- the treatment is not particularly limited as long as the treatment is performed on a copper foil used for a copper-clad laminate.
- Examples of the treatment include a roughening treatment, a heat treatment, a rust prevention treatment, and a silane coupling agent treatment.
- the copper foil may be subjected to any one of the treatments, or may be a combination of two or more kinds. When two or more treatments are performed, it is preferable to perform the roughening treatment, the heat treatment, the rust prevention treatment, and the silane coupling agent treatment in this order.
- the copper foil substrate only needs to contain copper, and examples thereof include a foil-like substrate made of copper or a copper alloy.
- the copper alloy include an alloy containing copper and at least one selected from the group consisting of nickel, phosphorus, tungsten, arsenic, molybdenum, chromium, cobalt, and zinc.
- the roughening treatment may be a roughening treatment generally performed when manufacturing a copper foil, and is not particularly limited, and the surface of the copper foil base material or the like to be treated is provided with roughened particles. And the like.
- the copper foil surface is covered with roughened particles made of copper or a copper alloy.
- the region composed of the roughened particles is also called a roughened layer.
- the copper foil may have a layer (roughened layer) formed by the roughening treatment.
- the heat treatment may be a heat treatment generally performed when producing a copper foil, is not particularly limited, for example, nickel, cobalt, copper, and zinc, a heat-resistant layer containing a simple substance or an alloy.
- the processing to be formed is exemplified. Even if the region formed by this heat treatment is not completely layered, it is also called a heat-resistant layer.
- the copper foil may have a layer (heat-resistant layer) formed by the heat-resistant treatment.
- the rust prevention treatment may be a rust prevention treatment generally performed when producing a copper foil, and is not particularly limited, but is preferably a treatment for forming a rust prevention layer containing nickel.
- examples of the rust prevention treatment include a chromate treatment. Even if the region formed by this rust-proof treatment is not completely layered, it is also called a rust-proof layer.
- the copper foil may have a layer (rust prevention layer) formed by the rust prevention treatment.
- the silane coupling agent treatment may be a silane coupling agent treatment that is generally performed when producing a copper foil, and is not particularly limited.
- the silane coupling agent treatment may be performed on the surface of the copper foil or the like that is an object to be treated. And a process of applying a silane coupling agent.
- the silane coupling agent treatment the silane coupling agent may be applied and then dried or heated.
- an alkoxy group of the silane coupling agent reacts and binds to copper or the like constituting a copper foil to be processed.
- the region formed by the combined silane coupling agent is a silane coupling agent layer.
- the copper foil may have a layer (silane coupling agent layer) formed by the silane coupling agent treatment.
- the copper foil include a copper foil including a copper foil substrate and a coating layer disposed on the copper foil substrate.
- the coating layer include a roughened layer, a heat-resistant layer, a rust-proof layer, and a silane coupling agent layer.
- the copper foil may be provided with these layers alone as the coating layer, or may be provided by laminating two or more layers.
- the said coating layer consists of multiple layers, it is preferable to provide in order of the said copper foil base material, a roughening layer, a heat-resistant layer, a rust prevention layer, and a silane coupling agent layer.
- the roughened layer examples include a layer containing roughened particles made of copper or a copper alloy.
- the copper alloy is the same as the copper alloy in the copper foil substrate.
- the roughened layer is obtained by, for example, roughening the copper foil base material.
- the roughening layer after forming roughened particles obtained by roughening the copper foil substrate, nickel, cobalt, copper, zinc and the like, particles composed of a simple substance or an alloy, secondary particles and Examples include a layer formed as tertiary particles. That is, the roughened layer may be a layer containing not only the roughened particles but also particles made of a simple substance or an alloy, such as nickel, cobalt, copper, and zinc.
- Examples of the heat-resistant layer include a layer containing a simple substance or an alloy of nickel, cobalt, copper, and zinc.
- the heat-resistant layer may be a single layer or two or more layers.
- Examples of the heat-resistant layer include a layer in which a nickel layer and a zinc layer are stacked.
- Examples of the rust preventive layer include a layer containing chromium, such as a chromate treatment layer.
- the rustproof layer is obtained, for example, by subjecting a copper foil substrate provided with the heat-resistant layer and the like to a chromate treatment.
- the silane coupling agent layer is a layer obtained by treating with a silane coupling agent.
- a layer obtained by treating a copper foil substrate provided with the rust-preventive layer or the like with a silane coupling agent may be mentioned.
- silane coupling agent examples include a silane coupling agent having an amino group in a molecule and a silane coupling agent having a carbon-carbon unsaturated double bond in a molecule.
- the silane coupling agent having an amino group in the molecule includes a compound having an amino group as a reactive functional group and further having a hydrolyzable group such as a methoxy group and an ethoxy group.
- Specific examples of the silane coupling agent having an amino group in the molecule include N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane and N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane.
- Ethoxysilane 1-aminopropyltrimethoxysilane, 2-aminopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 1,2-diaminopropyltrimethoxysilane, 3-amino-1-propenyltrimethoxysilane, 3- Aminopropyl triethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine, N-phenyl-3-aminopropyltrimethoxysilane, N- (vinylbenzyl) -2-aminoethyl- 3-aminopropyltrimethoxysilane, 3-aminopro Rutriethoxysilane, 3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-amino
- the silane coupling agent having a carbon-carbon unsaturated double bond in the molecule include at least one functional group selected from the group consisting of a methacryloxy group, a styryl group, a vinyl group, and an acryloxy group. And the like. That is, the silane coupling agent has at least one of a methacryloxy group, a styryl group, a vinyl group, and an acryloxy group as a reactive functional group, and further has a hydrolyzable group such as a methoxy group or an ethoxy group. And the like.
- Examples of the silane coupling agent having a carbon-carbon unsaturated double bond in a molecule include the following silane coupling agents.
- silane coupling agents having a methacryloxy group in a molecule include, for example, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-methacryloxypropylmethyldiethoxy Silane and 3-methacryloxypropylethyldiethoxysilane.
- silane coupling agent having a styryl group in a molecule include p-styryltrimethoxysilane and p-styryltriethoxysilane.
- silane coupling agent having a vinyl group in a molecule examples include vinyl triethoxy silane and vinyl trimethoxy silane.
- silane coupling agent having an acryloxy group in a molecule examples include 3-acryloxypropyltrimethoxysilane and 3-acryloxypropyltriethoxysilane.
- the chromium element amount can be adjusted, for example, by adjusting the thickness of a layer containing chromium, such as a chromate layer, in the coating layer.
- the nitrogen element can be present by forming a layer using a silane coupling agent having an amino group in the molecule as the silane coupling agent layer. Further, the amount (nitrogen element amount) can be adjusted by adjusting the thickness and the like of a layer obtained by using a silane coupling agent having an amino group in a molecule as a silane coupling agent layer.
- the average roughness of the exposed surface is 10 ⁇ m or less in average roughness, preferably 1.8 ⁇ m or less, more preferably 1.5 ⁇ m or less. It is considered that the lower the surface roughness of the exposed surface, that is, the higher the smoothness of the exposed surface, the higher the smoothness of the contact surface between the copper foil and the insulating layer, thereby reducing loss during signal transmission. It is preferable in that it can be performed. On the other hand, the surface roughness of the exposed surface is limited to about 0.2 ⁇ m in ten-point average roughness Rz, even if it is low.
- the surface roughness of the exposed surface is 0.2 ⁇ m or more in ten-point average roughness Rz. Accordingly, the surface roughness of the exposed surface is preferably 0.2 to 2.0 ⁇ m, more preferably 0.5 to 2.0 ⁇ m, and more preferably 0.6 to 1 ⁇ m in ten-point average roughness Rz. It is more preferably 0.8 ⁇ m, most preferably 0.6 to 1.5 ⁇ m.
- the ten-point average roughness Rz which is the surface roughness here, is based on JIS B 0601: 1994, and can be measured by a general surface roughness measuring instrument or the like. Specifically, for example, it can be measured using a surface roughness shape measuring instrument (SURFCOM500DX) manufactured by Tokyo Seimitsu Co., Ltd.
- SURFCOM500DX surface roughness shape measuring instrument
- the average roughness of the exposed surface can be adjusted by adjusting the average roughness of the surface of the copper foil on the side in contact with the insulating layer.
- the average roughness of the surface of the copper foil on the side in contact with the insulating layer is preferably 0.5 to 2.0 ⁇ m as a ten-point average roughness Rz.
- the copper foil has a surface having a large average roughness, a so-called M surface, as a surface in contact with the insulating layer. Then, it is sufficient that the above-mentioned coating layer is formed on the M surface side.
- the surface of the copper foil having a small average roughness may be formed with the above-mentioned coating layer as in the case of the M surface, or may be formed with only the rust prevention layer. However, the coating layer may not be formed.
- the resin composition used in the present embodiment may be prepared and used in a varnish form.
- a varnish form for the purpose of impregnating a base material (fibrous base material) for forming the prepreg. That is, the resin composition may be used as one prepared in a varnish form (resin varnish).
- the modified polyphenylene ether compound and the curing agent are dissolved in a resin varnish.
- Such a varnish-like composition (resin varnish) is prepared, for example, as follows.
- each component that can be dissolved in an organic solvent is put into an organic solvent and dissolved. At this time, heating may be performed if necessary. Thereafter, if necessary, a component that does not dissolve in the organic solvent is added, and the mixture is dispersed using a ball mill, a bead mill, a planetary mixer, a roll mill, or the like until a predetermined dispersion state is obtained. Is prepared.
- the organic solvent used here is not particularly limited as long as it dissolves the modified polyphenylene ether compound and the curing agent and does not inhibit the curing reaction. Specifically, for example, toluene, methyl ethyl ketone (MEK) and the like are mentioned.
- the insulating layer may include not only a cured product of the resin composition but also a fibrous base material.
- the fibrous base material the same as the fibrous base material contained in the prepreg described later can be used.
- the resin composition not only the copper-clad laminate but also a prepreg, a copper foil with resin, and a wiring board can be obtained as follows.
- the above-mentioned varnish-like composition may be used as the resin composition.
- the prepreg 1 includes the resin composition or a semi-cured product 2 of the resin composition, and a fibrous base material 3.
- the prepreg 1 includes a resin composition or a semi-cured product 2 of the resin composition in which a fibrous base material 3 is present. That is, the prepreg 1 includes the resin composition or the semi-cured product 2 of the resin composition, and the fibrous base material 3 existing in the resin composition or the semi-cured product 2 of the resin composition.
- FIG. 2 is a schematic sectional view showing an example of the prepreg 1 according to the present embodiment.
- the semi-cured product is a resin composition in which the resin composition is partially cured to such a degree that it can be further cured. That is, the semi-cured product is a semi-cured resin composition (B-staged). For example, when heated, the viscosity of the resin composition first decreases gradually, and thereafter, the curing starts, and the viscosity gradually increases. In such a case, the semi-cured state includes a state after the viscosity starts to increase and before complete curing.
- the prepreg may include a semi-cured resin composition as described above, or may include the uncured resin composition itself. That is, a prepreg including a semi-cured product of the resin composition (the B-stage resin composition) and a fibrous base material may be used, or the resin composition before curing (the A-stage resin composition) ) And a prepreg comprising a fibrous base material. Specifically, a resin composition in which a fibrous base material is present may be used. In addition, the resin composition or the semi-cured product of the resin composition may be obtained by drying and / or heating the resin composition.
- the method for producing the prepreg is not particularly limited as long as it is a method capable of producing the prepreg.
- a method capable of producing the prepreg for example, there is a method of impregnating a fibrous base material with a resin composition, for example, a resin composition prepared in a varnish form. That is, examples of the prepreg include those obtained by impregnating a fibrous base material with the resin composition.
- the method of impregnation is not particularly limited as long as the method can impregnate the fibrous base material with the resin composition.
- a method using a roll, a die coat, and a bar coat, spraying, and the like are not limited to the dip.
- a method for producing a prepreg after the impregnation, at least one of drying and heating may be performed on the fibrous base material impregnated with the resin composition. That is, as a method of manufacturing a prepreg, for example, a method of impregnating a resin composition prepared in a varnish form into a fibrous base material, followed by drying, a method of drying the resin composition prepared in a varnish form on the fibrous base material After impregnation, a method of heating, a method of impregnating a fibrous base material with a resin composition prepared in a varnish form, drying, and then heating are used.
- the fibrous base material used when producing the prepreg include, for example, glass cloth, aramid cloth, polyester cloth, liquid crystal polymer (Liquid Crystal Plastic): nonwoven fabric, glass nonwoven fabric, aramid nonwoven fabric, polyester nonwoven fabric , Pulp paper, and linter paper.
- a glass cloth is used, a laminate having excellent mechanical strength can be obtained, and particularly, a flattened glass cloth is preferable.
- the glass cloth is not particularly limited, and examples thereof include glass cloths made of low dielectric constant glass such as E glass, S glass, NE glass, L glass, and Q glass.
- the flattening treatment can be performed by continuously pressing the glass cloth with an appropriate pressure with a press roll to compress the yarn flatly.
- the thickness of the fibrous base material for example, a thickness of 0.01 to 0.3 mm can be generally used.
- Impregnation of the fibrous base material with the resin composition is performed by dipping, coating or the like. This impregnation can be repeated a plurality of times as necessary. At this time, it is also possible to repeat the impregnation using a plurality of resin compositions having different compositions and concentrations, and finally adjust the composition and the impregnation amount to the desired values.
- the fibrous base material impregnated with the resin composition (resin varnish) is heated at a desired heating condition, for example, at 80 to 180 ° C. for 1 to 10 minutes.
- a desired heating condition for example, at 80 to 180 ° C. for 1 to 10 minutes.
- the solvent is volatilized from the resin varnish, and the solvent is reduced or removed to obtain a prepreg in a pre-cured (A stage) or semi-cured state (B stage).
- the method of manufacturing the copper-clad laminate according to the present embodiment is not particularly limited as long as the copper-clad laminate can be manufactured.
- a method for producing the copper-clad laminate for example, except for using the resin composition and the copper foil, it is possible to obtain a copper-clad laminate in the same manner as a general method for producing a copper-clad laminate. it can.
- a method using the prepreg is exemplified.
- one or more prepregs are stacked, and further, on both upper and lower surfaces or one surface thereof, the copper foil is contacted with the prepreg so that the copper foil is A method of stacking and laminating them by heating and pressing to form a laminate and the like can be given.
- a step of obtaining the resin composition a step of impregnating the resin composition with a fibrous base material to obtain a prepreg, and laminating the copper foil on the prepreg
- a step of obtaining a copper-clad laminate including an insulating layer containing a cured product of the resin composition and a copper foil present in contact with at least one surface of the insulating layer by heat-press molding
- a copper-clad laminate having copper foil on both sides or a copper-clad laminate having copper foil on one side can be produced.
- the heating and pressing conditions can be set as appropriate depending on the thickness of the laminated board to be manufactured, the type of the resin composition contained in the prepreg, and the like.
- the temperature can be 170 to 210 ° C.
- the pressure can be 3.5 to 4 MPa
- the time can be 60 to 150 minutes.
- the copper-clad laminate may be manufactured without using a prepreg. For example, there is a method in which a varnish-like resin composition or the like is applied on the copper foil, a layer containing the curable composition is formed on the copper foil, and then heating and pressing are performed.
- a wiring board according to another embodiment of the present invention includes a wiring obtained by partially removing the copper foil provided on the copper-clad laminate, and the insulating layer. That is, as shown in FIG. 3, the wiring board 21 includes the insulating layer 12 and, on both surfaces thereof, the wiring 14 obtained by partially removing the copper foil provided in the copper-clad laminate. Is mentioned. Further, the wiring board may be provided with wiring in contact with only one surface of the insulating layer.
- FIG. 3 is a cross-sectional view illustrating the configuration of the wiring board 21 according to the present embodiment.
- the wiring board 21 includes the insulating layer 12 and the wiring 14 existing in contact with at least one surface of the insulating layer 12.
- Examples of the wiring board 21 include a wiring board in which the surface 15 of the insulating layer 12 existing between the wirings 14 has the following surface, like the exposed surface.
- the amount of chromium element measured by XPS is 7.5 atomic% or less with respect to the total amount of elements measured by XPS.
- the surface roughness of the surface 15 is 2.0 ⁇ m or less in ten-point average roughness.
- the insulating layer 12 includes the surface 15 corresponding to the exposed surface.
- the same layer as the insulating layer of the copper clad laminate may be used.
- the wiring 17 include a wiring formed by partially removing a copper foil of the copper-clad laminate.
- Such wirings include, for example, subtractive, additive, semi-additive (Semi Additive Process), modified semi-additive (Modified Semi Additive Process), chemical mechanical polishing (CMP), trench, ink jet, and the like. And wiring formed by a method using transfer or the like.
- This copper-clad laminate has high signal transmission speed and high heat resistance. This is considered to be due to the wiring board obtained using the copper-clad laminate. Specifically, as described above, it is considered that the occurrence of delamination can be sufficiently suppressed because the amount of the compound containing a chromium element existing between the wirings is small. Further, it is considered that the high signal transmission speed is due to the fact that, as described above, the insulating layer has a low dielectric constant and a low dielectric loss tangent, and further, the smoothness of the contact surface between the wiring and the insulating property is high. Can be
- the wiring board according to the present embodiment may have one insulating layer as shown in FIG. 3, or may have a plurality of insulating layers as shown in FIG. .
- the wiring may be disposed on a surface of the plurality of the insulating layers, or may be disposed between the insulating layers. It may be.
- the wiring board 31 according to the present embodiment has a plurality of the insulating layers 12 as shown in FIG. Then, in the wiring board 31, the wiring 14 is disposed between the insulating layers 12.
- FIG. 4 is a schematic sectional view showing another example of the wiring board 31 according to the embodiment of the present invention.
- the wiring board as shown in FIG. 4 is manufactured, for example, as follows.
- the prepreg is laminated on at least one side of a wiring board as shown in FIG. 3, and further, if necessary, a copper foil is laminated thereon, followed by heating and pressing. Wiring is formed by etching the copper foil on the surface of the laminate thus obtained. In this way, a multilayer wiring board as shown in FIG. 4 can be manufactured.
- Such a wiring board is a multilayer wiring board having a high signal transmission speed and high heat resistance. Specifically, it is a multi-layer wiring board, high heat resistance, delamination hardly occurs even when heated, so even if the wiring is arranged between the insulating layer and the insulating layer, The occurrence of separation between the insulating layer and the insulating layer can be suppressed.
- a copper foil with resin according to another embodiment of the present invention includes a resin layer and a copper foil present in contact with one surface of the resin layer.
- the resin-attached copper foil 41 includes a resin layer 42 and a copper foil 43 arranged to be in contact with one surface thereof.
- FIG. 5 is a cross-sectional view showing the configuration of the copper foil with resin 41 according to the present embodiment.
- the resin layer 42 contains the resin composition (A-stage resin composition) or a semi-cured resin composition (B-stage resin composition) as described above. Further, the resin layer only needs to contain the resin composition or a semi-cured product of the resin composition, and may or may not contain a fibrous base material. Further, as the fibrous base material, the same as the fibrous base material of the prepreg can be used.
- the copper foil 43 is the same as the copper foil provided on the copper-clad laminate.
- the amount of chromium measured by X-ray photoelectron spectroscopy on the exposed surface where the resin layer after curing and etching the resin-coated copper foil with a copper chloride solution is exposed It is 7.5 atomic% or less with respect to the total amount of elements measured by X-ray photoelectron spectroscopy, and the surface roughness of the exposed surface is 2.0 ⁇ m or less in ten-point average roughness.
- Such a resin-coated copper foil can suitably produce a wiring board having a higher signal transmission speed and a higher heat resistance.
- the method for manufacturing the resin-coated copper foil according to the present embodiment is not particularly limited as long as the method can manufacture the resin-coated copper foil.
- a resin-attached copper foil can be obtained in the same manner as a general method for producing a resin-attached copper foil, except that the resin composition and the copper foil are used.
- there is a method of applying the resin composition for example, a resin composition prepared in a varnish form, on the copper foil. That is, examples of the copper foil with resin according to the embodiment of the present invention include those obtained by applying the resin composition to the copper foil.
- the method of applying is not particularly limited as long as the method can apply the resin composition to the copper foil.
- a method using a roll, a die coat, and a bar coat, spraying, and the like can be mentioned.
- a method for producing a copper foil with a resin after the application, at least one of drying and heating may be performed on the copper foil to which the resin composition has been applied. That is, as a method of producing a resin-coated copper foil, for example, a method of applying a resin composition prepared in a varnish form on a copper foil and then drying the resin composition prepared in a varnish form, Examples of the method include a method in which the resin composition is applied on a foil and then heated, and a method in which the resin composition prepared in a varnish form is applied on a copper foil, dried, and then heated.
- the copper foil to which the resin composition has been applied is heated under desired heating conditions, for example, at 80 to 180 ° C. for 1 to 10 minutes, so that the copper foil before curing (A stage) or semi-cured state (B stage) can be obtained.
- a resin-coated copper foil is obtained.
- a copper-clad laminate according to one embodiment of the present invention is a copper-clad laminate including an insulating layer and a copper foil that is in contact with at least one surface of the insulating layer, wherein the insulating layer includes carbon.
- the amount of chromium element measured by X-ray photoelectron spectroscopy on the exposed surface is 7.5 atomic% or less based on the total amount of elements measured by X-ray photoelectron spectroscopy.
- the surface roughness is not more than 2.0 ⁇ m in ten-point average roughness.
- the cured product contained in the insulating layer is a cured product obtained by curing the resin composition containing the modified polyphenylene ether compound, it is considered that the heat resistance of the insulating layer can be increased. .
- the present inventors have found that delamination occurring between layers is affected by the originally existing copper foil even when no copper foil exists between them. From this, it is considered that an etching residue derived from the copper foil exists on the exposed surface where the insulating layer is exposed by the etching process. The present inventors have guessed that if a compound containing a chromium element is present as this etching residue, delamination is likely to occur when heated.
- the amount of chromium element present on the exposed surface is small as described above, the amount of chromium element also present on the surface of the insulating layer existing between wirings in the wiring board manufactured from the copper-clad laminate, that is, It is considered that the amount of the compound containing chromium element is small. From this, it is considered that the copper-clad laminate has high heat resistance that can sufficiently suppress delamination even when heated.
- the cured product contained in the insulating layer is a cured product obtained by curing the resin composition containing the modified polyphenylene ether compound, the cured product has a low dielectric constant and a low dielectric loss tangent. From this, it is considered that this wiring board can reduce the transmission loss due to the dielectric around the wiring and can increase the signal transmission speed.
- the smoothness of the contact surface between the copper foil and the insulating layer is also high. From this, it is considered that the wiring board obtained from the copper-clad laminate has high smoothness of the contact surface between the wiring and the insulating layer. It is considered that the signal transmitted through the wiring is concentrated near the surface of the conductor forming the wiring due to the skin effect. This effect is considered to be more remarkable as the signal transmitted through the wiring has a higher frequency. Then, when the contact surface between the wiring and the insulating layer becomes smooth, the signal flowing through the wiring flows near the surface having high smoothness, so that the transmission distance is shortened. From this, it is considered that this wiring board can reduce the transmission loss caused by the conductor forming the wiring and can increase the signal transmission speed.
- this wiring board can reduce both the transmission loss caused by the conductor forming the wiring and the transmission loss caused by the dielectric around the wiring, and can increase the signal transmission speed.
- the copper-clad laminate is a copper-clad laminate capable of suitably producing a wiring board having a high signal transmission speed and high heat resistance.
- the substituent is preferably a group represented by the formula (1) or the formula (2).
- the modified polyphenylene ether can maintain the low dielectric constant and dielectric loss tangent of polyphenylene ether, and can further enhance the curability. Therefore, the insulating layer containing the cured product of the modified polyphenylene ether is considered to be a layer having a low dielectric constant and a low dielectric loss tangent and a high heat resistance. From these facts, it is considered that a copper-clad laminate can be obtained in which a signal transmission speed is higher and a wiring board having higher heat resistance can be suitably manufactured.
- the copper-clad laminate it is preferable that a nitrogen element which can be confirmed by X-ray photoelectron spectroscopy exists on the exposed surface.
- the present inventors have found that, when a nitrogen element which can be confirmed by X-ray photoelectron spectroscopy is present on the exposed surface, delamination hardly occurs even when heated. As described above, the present inventors speculated that if a compound containing a chromium element is present as an etching residue, delamination is likely to occur when heated. On the other hand, when a compound containing a nitrogen element is present as an etching residue in an amount that can be confirmed by X-ray photoelectron spectroscopy, the surface of an insulating layer existing between wirings in a wiring board manufactured from the copper-clad laminate is measured. It is considered that a compound containing a certain amount or more of nitrogen element is present also on the top.
- the compound containing the nitrogen element enhances the interlayer adhesion between the insulating layer and the insulating layer, and makes it difficult for delamination to occur.
- This is considered to provide a copper-clad laminate capable of suitably producing a wiring board having higher heat resistance.
- the amount of nitrogen element measured by X-ray photoelectron spectroscopy on the exposed surface is 1.0 atomic% or more based on the total amount of elements measured by X-ray photoelectron spectroscopy. It is preferred that
- the nitrogen element is preferably derived from a nitrogen atom contained in the compound having an amino group.
- the nitrogen element is derived from a nitrogen atom contained in a compound having an amino group means that the compound containing a nitrogen element, which is present as an etching residue, is a compound having an amino group. Then, it is considered that the compound having the amino group enhances the interlayer adhesion between the insulating layer and the insulating layer, and more effectively exerts the effect that interlayer delamination hardly occurs. From this, it is considered that a copper-clad laminate capable of suitably producing a wiring board having higher heat resistance is obtained.
- a wiring board according to another aspect of the present invention is characterized by including a wiring obtained by partially removing the copper foil provided in the copper-clad laminate, and the insulating layer.
- the wiring board has a plurality of the insulating layers, and the wiring is disposed between the insulating layers.
- a multilayer wiring board having a high signal transmission speed and high heat resistance can be provided. Specifically, it is a multi-layer wiring board, high heat resistance, delamination hardly occurs even when heated, so even if the wiring is arranged between the insulating layer and the insulating layer, The occurrence of separation between the insulating layer and the insulating layer can be suppressed.
- the resin-coated copper foil according to another embodiment of the present invention is a resin-coated copper foil including a resin layer and a copper foil that is in contact with at least one surface of the resin layer, wherein the resin The layer contains a resin composition containing a modified polyphenylene ether compound terminal-modified with a substituent having a carbon-carbon unsaturated double bond or a semi-cured product of the resin composition, and the resin layer is cured.
- the amount of chromium measured by X-ray photoelectron spectroscopy on the exposed surface where the resin layer after the resin-coated copper foil is cured by etching with a copper chloride solution is measured by X-ray photoelectron spectroscopy. It is 7.5 atomic% or less with respect to the element amount, and the surface roughness of the exposed surface is 2.0 ⁇ m or less in ten-point average roughness.
- the resin layer contains a resin composition containing the modified polyphenylene ether compound or a semi-cured product of the resin composition. From this, when the resin-coated copper foil is used when manufacturing a wiring board, the insulating layer obtained by curing the resin layer has the resin composition or a semi-cured product of the resin composition cured. It is considered that the heat resistance of the insulating layer can be improved because the cured product is included.
- an etching residue derived from the copper foil is present on the exposed surface where the resin layer after the resin layer is cured by etching the copper foil with the resin obtained by curing the resin layer with a copper chloride solution.
- the amount of chromium element present on the exposed surface as the etching residue is small as described above, when the resin-coated copper foil is used in manufacturing a wiring board, an insulating layer existing between wirings in the wiring board is used. It is considered that the amount of the chromium element existing on the surface of, that is, the amount of the compound containing the chromium element is small. From this, it is considered that the copper foil with resin has high heat resistance, which can sufficiently suppress delamination even when heated.
- the insulating layer obtained by curing the resin layer includes a cured product obtained by curing the resin composition or a semi-cured product of the resin composition.
- the cured product includes a cured product obtained by curing a resin composition containing the modified polyphenylene ether compound. Therefore, an insulating layer obtained by curing the resin layer has a low dielectric constant and a low dielectric tangent. From this, it is considered that this wiring board can reduce the transmission loss due to the dielectric around the wiring and can increase the signal transmission speed.
- the smoothness of the contact surface between the copper foil and the resin layer is also high. From this, it is considered that when the resin-coated copper foil is used in manufacturing a wiring board, the smoothness of the contact surface between the wiring and the insulating layer obtained by curing the resin layer is high. It is considered that the signal transmitted through the wiring is concentrated near the surface of the conductor forming the wiring due to the skin effect. This effect is considered to be more remarkable as the signal transmitted through the wiring has a higher frequency. Then, when the contact surface between the wiring and the insulating layer becomes smooth, the signal flowing through the wiring flows near the surface having high smoothness, so that the transmission distance is shortened. From this, it is considered that this wiring board can reduce the transmission loss caused by the conductor forming the wiring and can increase the signal transmission speed.
- this wiring board can reduce both the transmission loss caused by the conductor forming the wiring and the transmission loss caused by the dielectric around the wiring, and can increase the signal transmission speed.
- the resin-coated copper foil is a copper-clad laminate that can suitably produce a wiring board having a high signal transmission speed and high heat resistance.
- the present invention it is possible to provide a copper-clad laminate and a resin-coated copper foil capable of suitably producing a wiring board having a high signal transmission speed and a high heat resistance. Further, according to the present invention, it is possible to provide a wiring board having a high signal transmission speed and high heat resistance.
- Modified polyphenylene ether compound Modified PPE-1: It is a modified polyphenylene ether obtained by reacting polyphenylene ether with chloromethylstyrene.
- polyphenylene ether (SA90 manufactured by SABIC Innovative Plastics, two terminal hydroxyl groups, weight average molecular weight Mw 1700) was placed in a 1-liter three-necked flask equipped with a temperature controller, a stirrer, a cooling device, and a dropping funnel.
- the obtained solid was analyzed by 1 H-NMR (400 MHz, CDCl 3 , TMS). As a result of NMR measurement, a peak derived from a vinylbenzyl group (ethenylbenzyl group) was confirmed at 5 to 7 ppm. Thus, it was confirmed that the obtained solid was a modified polyphenylene ether having a vinylbenzyl group as a substituent in the molecule at the molecular terminal. Specifically, it was confirmed that the polyphenylene ether was ethenylbenzylated.
- the obtained modified polyphenylene ether compound is represented by the above formula (10), wherein Y is a dimethylmethylene group (represented by the formula (8), and R 32 and R 33 in the formula (8) are methyl groups). ), Wherein R 1 was a hydrogen atom and R 2 was a methylene group.
- the number of terminal functional groups of the modified polyphenylene ether was measured as follows.
- the modified polyphenylene ether was accurately weighed. The weight at that time is defined as X (mg).
- TEAH tetraethylammonium hydroxide
- the absorbance (Abs) at 318 nm was measured using a UV spectrophotometer (UV-1600 manufactured by Shimadzu Corporation). Then, from the measurement results, the number of terminal hydroxyl groups of the modified polyphenylene ether was calculated using the following equation.
- Residual OH amount ( ⁇ mol / g) [(25 ⁇ Abs) / ( ⁇ ⁇ OPL ⁇ X)] ⁇ 10 6
- ⁇ indicates the extinction coefficient, which is 4700 L / mol ⁇ cm.
- OPL is the cell optical path length, which is 1 cm.
- the calculated residual OH content (the number of terminal hydroxyl groups) of the modified polyphenylene ether was almost zero, indicating that the hydroxyl groups of the polyphenylene ether before modification were substantially modified. From this, it was found that the decrease from the number of terminal hydroxyl groups of the polyphenylene ether before modification was the number of terminal hydroxyl groups of the polyphenylene ether before modification. That is, it was found that the number of terminal hydroxyl groups of the polyphenylene ether before modification was the number of terminal functional groups of the modified polyphenylene ether. That is, the number of terminal functional groups was two.
- the intrinsic viscosity (IV) of the modified polyphenylene ether was measured in methylene chloride at 25 ° C. Specifically, the intrinsic viscosity (IV) of the modified polyphenylene ether was measured by using a 0.18 g / 45 ml methylene chloride solution (liquid temperature: 25 ° C.) of the modified polyphenylene ether using a viscometer (AVS500, manufactured by Schott, Visco, System). It was measured. As a result, the intrinsic viscosity (IV) of the modified polyphenylene ether was 0.09 dl / g.
- Modified PPE-2 Modified polyphenylene ether in which the terminal hydroxyl group of polyphenylene ether is modified with a methacryl group (having a structure represented by formula (11), wherein in formula (11), R 3 is a methyl group, Y is a dimethylmethylene group (formula (8) Wherein R 32 and R 33 in the formula (8) are methyl groups), a modified polyphenylene ether compound, SA9000 manufactured by SABIC Innovative Plastics, and an intrinsic viscosity (IV) in methylene chloride at 25 ° C. 0.085 dl / g, weight average molecular weight Mw2000, number of terminal functional groups 1.8)
- thermosetting curing agent having two or more carbon-carbon unsaturated double bonds at molecular terminals
- TAIC triallyl isocyanurate (a thermosetting curing agent having three carbon-carbon unsaturated double bonds at molecular terminals, TAIC manufactured by Nippon Kasei Co., Ltd., weight average molecular weight Mw 249)
- DVB divinylbenzene (a thermosetting curing agent having two carbon-carbon unsaturated double bonds at molecular terminals, DVB810 manufactured by Nippon Steel & Sumitomo Metal Corporation, molecular weight 130)
- Epoxy compound dicyclopentadiene epoxy resin (HP-7200 manufactured by DIC Corporation)
- Phenol novolak resin Phenol novolak resin (TD2131 manufactured by DIC Corporation)
- Silica 1 spherical silica treated with vinylsilane (SC2300-SVJ manufactured by Admatechs Co., Ltd.)
- Silica 2 spherical silica treated with aminosilane (SC2500-SXJ manufactured by Admatechs Co., Ltd.)
- Flame retardants Flame retardants: SAYTEX8010 manufactured by Albemarle
- the obtained varnish was impregnated in a glass cloth, and then heated and dried at 100 to 170 ° C. for about 3 to 6 minutes to produce a prepreg.
- the glass cloth is specifically a # 1078 type, L glass manufactured by Asahi Kasei Corporation. At that time, the content (resin content) of the resin composition was adjusted to be about 66% by mass.
- Copper foil-1 Copper foil whose entire surface is treated with a silane coupling agent having an amino group in the molecule (FV-WS (amino) manufactured by Furukawa Electric Co., Ltd., copper foil treated with aminosilane, M-face chromium (Attached amount: 7.4 atomic%, ten-point average roughness Rz of M plane: 1.3 ⁇ m, thickness: 18 ⁇ m)
- Copper foil-2 Copper foil whose surface is entirely treated with a silane coupling agent having a vinyl group in the molecule (FV-WS (low chrome) manufactured by Furukawa Electric Co., Ltd., copper foil treated with vinylsilane, M surface) (Chromium adhesion amount: 3.7 atomic%, M-plane ten-point average roughness Rz: 1.3 ⁇ m, thickness: 18 ⁇ m)
- Copper foil-3 Copper foil whose surface has been entirely treated with a silane coupling agent having an amino group in the molecule (TLC-V1, manufactured by Nanya
- the obtained copper-clad laminate was etched using a cupric chloride solution (solution temperature: 45 ° C.) for 90 seconds, and then washed with city water or pure water at normal temperature. By doing so, the copper foil was removed.
- a surface element analysis by XPS was performed on a surface (exposed surface) of the insulating layer exposed by the etching treatment.
- the M surface (contact surface) was irradiated with X-rays under the following conditions in a direction perpendicular to the M surface under vacuum, the irradiation height was adjusted, and the M surface (contact surface) was released with ionization of the sample The measurement was performed at a position where the photoelectrons to be detected can be detected with the highest intensity.
- the XPS was measured under the following conditions using PHI $ 5000 Versaprobe manufactured by ULVAC-PHI, Inc.
- X-ray used Monochrome Al-K ⁇ ray X-ray beam diameter: about 100 ⁇ m ⁇ (25 W, 15 kV) Analysis area: about 100 ⁇ m ⁇ The value obtained by the above measurement was quantitatively converted by using a relative sensitivity coefficient incorporated in analysis software provided in the above device.
- the surface roughness (ten-point average roughness Rz) of the exposed surface, the ten-point average roughness Rz, which is the surface roughness herein, is based on JIS B 0601: 1994, and is a surface roughness manufactured by Tokyo Seimitsu Co., Ltd.
- the shape was measured using a shape measuring instrument (SURFCOM500DX).
- One metal foil (copper foil) of the evaluation substrate was processed to form ten wires having a line width of 100 to 300 ⁇ m, a line length of 1000 mm, and a line length of 20 mm.
- a two-layered prepreg and a metal foil (copper foil) were secondarily laminated on the surface of the substrate on which the wiring was formed, on the side where the wiring was formed, to produce a three-layer board.
- the line width of the wiring was adjusted so that the characteristic impedance of the wiring after forming the three-layer plate was 50 ⁇ .
- the transmission loss (pass loss) (dB / m) at 12.5 GHz of the wiring formed on the obtained three-layer plate was measured using a network analyzer (N5230A manufactured by Keysight Technology Co., Ltd.).
- the prepreg is stacked one by one on the front and back sides of the copper-clad laminate subjected to the entire surface etching treatment, and heated and pressed at a temperature of 200 ° C. and a pressure of 3 MPa for 100 minutes, so that both sides are formed.
- a copper-clad laminate to which a copper foil was adhered was obtained.
- the formed copper-clad laminate was cut into 50 mm ⁇ 50 mm, and the double-sided copper foil was removed by etching.
- the laminate for evaluation thus obtained was immersed in a solder bath at 288 ° C. for 30 seconds. Then, the immersed laminate was visually observed for the occurrence of blistering. This observation was made on the two laminates.
- solder heat resistance 1 A laminate for evaluation was obtained in the same manner as in the evaluation of the solder heat resistance, and the laminate for evaluation was immersed in boiling ion-exchanged water for 4 hours before being immersed in a solder bath at 288 ° C. for 30 seconds. Other than the above, the evaluation was the same as in the evaluation of the solder heat resistance. The evaluation criteria were the same as in the evaluation of the solder heat resistance.
- solder heat resistance 2 In the same manner as in the evaluation of the solder heat resistance, a laminate for evaluation was obtained, and the laminate for evaluation was immersed in boiling ion-exchanged water for 6 hours before being immersed in a solder bath at 288 ° C. for 30 seconds. Other than the above, the evaluation was the same as in the evaluation of the solder heat resistance. The evaluation criteria were the same as in the evaluation of the solder heat resistance.
- each metal-clad laminate shows that the copper foil marked with “ ⁇ ” was used in the column of copper foil in Table 1.
- the amount of chromium element obtained by XPS measurement on the exposed surface is 7.5 atomic% or less, and the surface roughness of the exposed surface is 2.0 ⁇ m or less in ten-point average roughness.
- the transmission loss is lower than that in the case of not (Comparative Examples 1 to 4), and Heat resistance was high.
- the heat resistance of the copper-clad laminates according to Examples 1 to 7 was higher than that in the case where the chromium element amount exceeded 7.5 atomic% (Comparative Examples 1 and 2).
- the copper-clad laminates according to Examples 1 to 7 are not a resin composition containing the modified polyphenylene ether compound but a resin composition containing an epoxy compound and a phenol novolak compound as the insulating layer ( The transmission loss was lower than that of Comparative Example 3). Further, the copper-clad laminates according to Examples 1 to 7 have lower transmission loss than the case where the surface roughness of the exposed surface exceeds 2.0 ⁇ m in ten-point average roughness (Comparative Example 4). Was.
- a copper-clad laminate and a resin-coated copper foil capable of suitably producing a wiring board having a high signal transmission speed and high heat resistance. Further, according to the present invention, a wiring board having a high signal transmission speed and high heat resistance is provided.
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Abstract
Description
本発明の実施形態に係る銅張積層板は、絶縁層と、前記絶縁層の少なくとも一方の表面に接触して存在する銅箔とを備える。この銅張積層板11は、図1に示すように、絶縁層12と、その両面に接触するように配置される銅箔13とを備えるものが挙げられる。また、前記銅張積層板は、前記絶縁層の一方の面上にのみ、銅箔が接触して備えられるものであってもよい。なお、図1は、本実施形態に係る銅張積層板11の構成を示す概略断面図である。
本実施形態において用いられる樹脂組成物は、上述したように、前記変性ポリフェニレンエーテル化合物を含有する。
本実施形態において用いられる変性ポリフェニレンエーテル化合物は、炭素-炭素不飽和二重結合を有する置換基により末端変性されたポリフェニレンエーテルであれば、特に限定されない。
前記樹脂組成物は、硬化剤を含有してもよい。前記樹脂組成物には、硬化剤を含有しなくてもよいが、前記変性ポリフェニレンエーテル化合物を好適に硬化させるために、硬化剤を含有していることが好ましい。前記硬化剤は、前記ポリフェニレンエーテル化合物と反応して前記ポリフェニレンエーテル化合物を含む樹脂組成物を硬化させることができる硬化剤である。また、前記硬化剤は、前記ポリフェニレンエーテル化合物を含む樹脂組成物を硬化させることができる硬化剤であれば、特に限定されない。前記硬化剤としては、例えば、スチレン、スチレン誘導体、分子中にアクリロイル基を有する化合物、分子中にメタクリロイル基を有する化合物、分子中にビニル基を有する化合物、分子中にアリル基を有する化合物、分子中にアセナフチレン構造を有する化合物、分子中にマレイミド基を有する化合物、及び分子中にイソシアヌレート基を有する化合物等が挙げられる。
本実施形態に係る樹脂組成物は、本発明の効果を損なわない範囲で、必要に応じて、前記変性ポリフェニレンエーテル化合物及び前記架橋剤以外の成分(その他の成分)を含有してもよい。本実施の形態に係る樹脂組成物に含有されるその他の成分としては、例えば、シランカップリング剤、難燃剤、開始剤、消泡剤、酸化防止剤、熱安定剤、帯電防止剤、紫外線吸収剤、染料や顔料、滑剤、及び無機充填材等の添加剤をさらに含んでもよい。また、前記樹脂組成物には、前記変性ポリフェニレンエーテル化合物以外にも、エポキシ樹脂、不飽和ポリエステル樹脂、熱硬化性ポリイミド樹脂、マレイミド化合物、及び変性マレイミド化合物等の熱硬化性樹脂を含有してもよい。前記変性マレイミド化合物としては、例えば、分子中の少なくとも一部がシリコーン化合物で変性されたマレイミド化合物、及び分子中の少なくとも一部がアミン化合物で変性されたマレイミド化合物等が挙げられる。
前記銅箔は、前記銅張積層板を塩化銅溶液でエッチング処理したら、前記露出面が、上記のようになる銅箔であれば、特に限定されない。具体的には、前記露出面における、XPSにより測定されるクロム元素量が、XPSにより測定される全元素量に対して、7.5原子%以下であり、前記露出面の表面粗さは、十点平均粗さで2.0μm以下となるような銅箔であれば、特に限定されない。前記露出面を形成するときの、前記銅張積層板のエッチング処理は、塩化銅溶液でのエッチング処理であり、前記銅箔が除去される処理である。具体的には、塩化第二銅溶液を用い、この液温が45℃で、90秒間(例えば、銅箔の厚みが18μmの場合)エッチングし、その後、市水又は純水を用い、常温で水洗することにより、前記銅箔が除去される処理である。
本実施形態で用いる樹脂組成物は、ワニス状に調製して用いてもよい。例えば、プリプレグを製造する際に、プリプレグを形成するための基材(繊維質基材)に含浸することを目的として、ワニス状に調製して用いてもよい。すなわち、樹脂組成物は、ワニス状に調製されたもの(樹脂ワニス)として用いてもよい。また、本実施形態で用いる樹脂組成物において、前記変性ポリフェニレンエーテル化合物と前記硬化剤とは、樹脂ワニス中に溶解されたものである。このようなワニス状の組成物(樹脂ワニス)は、例えば、以下のようにして調製される。
本発明の他の実施形態に係る配線板は、前記銅張積層板に備えられる前記銅箔を部分的に除去されてなる配線と、前記絶縁層とを備える。すなわち、この配線板21は、図3に示すように、前記絶縁層12と、その両面に、前記銅張積層板に備えられる前記銅箔を部分的に除去されてなる配線14とを備えるものが挙げられる。また、前記配線板は、前記絶縁層の一方の面上にのみ、配線が接触して備えられるものであってもよい。なお、図3は、本実施形態に係る配線板21の構成を示す断面図である。
本発明の他の実施形態に係る樹脂付き銅箔は、樹脂層と、前記樹脂層の一方の表面に接触して存在する銅箔とを備える。この樹脂付き銅箔41は、図5に示すように、樹脂層42と、その一方の面に接触するように配置される銅箔43とを備えるものが挙げられる。なお、図5は、本実施形態に係る樹脂付き銅箔41の構成を示す断面図である。
本実施例において、樹脂組成物を調製する際に用いる各成分について説明する。
変性PPE-1:
ポリフェニレンエーテルとクロロメチルスチレンとを反応させて得られた変性ポリフェニレンエーテルである。
ここで、εは、吸光係数を示し、4700L/mol・cmである。また、OPLは、セル光路長であり、1cmである。
ポリフェニレンエーテルの末端水酸基をメタクリル基で変性した変性ポリフェニレンエーテル(式(11)に示す構造を有し、式(11)中、R3がメチル基であり、Yがジメチルメチレン基(式(8)で表され、式(8)中のR32及びR33がメチル基である基)である変性ポリフェニレンエーテル化合物、SABICイノベーティブプラスチックス社製のSA9000、25℃の塩化メチレン中で固有粘度(IV)0.085dl/g、重量平均分子量Mw2000、末端官能基数1.8個)
TAIC:トリアリルイソシアヌレート(炭素-炭素不飽和二重結合を分子末端に3つ有する熱硬化性硬化剤、日本化成株式会社製のTAIC、重量平均分子量Mw249)
DVB:ジビニルベンゼン(炭素-炭素不飽和二重結合を分子末端に2つ有する熱硬化性硬化剤、新日鐵住金株式会社製のDVB810、分子量130)
エポキシ化合物:ジシクロペンタジエンエポキシ樹脂(DIC株式会社製のHP-7200)
フェノールノボラック樹脂:フェノールノボラック樹脂(DIC株式会社製のTD2131)
シリカ1:ビニルシラン処理された球状シリカ(株式会社アドマテックス製のSC2300-SVJ)
シリカ2:アミノシラン処理された球状シリカ(株式会社アドマテックス製のSC2500-SXJ)
PBP:α,α’-ジ(t-ブチルパーオキシ)ジイソプロピルベンゼン(日油株式会社製のパーブチルP(PBP))
イミダゾール化合物:2-エチル-4-イミダゾール(四国化成工業株式会社製の2E4MZ)
難燃剤:アルベマール社製のSAYTEX8010
次に、樹脂組成物の調製方法について説明する。
次に、得られたワニスをガラスクロスに含浸させた後、100~170℃で約3~6分間加熱乾燥することによりプリプレグを作製した。上記ガラスクロスは、具体的には、旭化成株式会社製の♯1078タイプ、Lガラスである。その際、樹脂組成物の含有量(レジンコンテント)が約66質量%となるように調整した。
銅箔-1:分子中にアミノ基を有するシランカップリング剤で全面を表面処理した銅箔(古河電気工業株式会社製のFV-WS(アミノ)、アミノシラン処理を施した銅箔、M面クロム付着量:7.4原子%、M面の十点平均粗Rz:1.3μm、厚み:18μm)
銅箔-2:分子中にビニル基を有するシランカップリング剤で全面を表面処理した銅箔(古河電気工業株式会社製のFV-WS(低クロム)、ビニルシラン処理を施した銅箔、M面クロム付着量:3.7原子%、M面の十点平均粗Rz:1.3μm、厚み:18μm)
銅箔-3:分子中にアミノ基を有するシランカップリング剤で全面を表面処理した銅箔(南亜プラスチック社製のTLC-V1、アミノシラン処理を施した銅箔、M面クロム付着量:1.8原子%、M面の十点平均粗Rz:1.3μm、厚み:18μm)
銅箔-4:分子中にアミノ基を有するシランカップリング剤で全面を表面処理した銅箔(台日古河銅箔股彬有限公司製のFX-WS、アミノシラン処理を施した銅箔、M面クロム付着量:7.4原子%、M面の十点平均粗Rz:1.3μm、厚み:18μm)
銅箔-5:分子中にアミノ基を有するシランカップリング剤で全面を表面処理した銅箔(長春ジャパン株式会社製のVFPR1、アミノシラン処理を施した銅箔、M面クロム付着量:7.4原子%、M面の十点平均粗Rz:1.3μm、厚み:18μm)
銅箔-6:分子中にビニル基を有するシランカップリング剤で全面を表面処理した銅箔(古河電気工業株式会社製のFV-WS(ビニル)、ビニルシラン処理を施した銅箔、M面クロム付着量:7.4原子%、M面の十点平均粗Rz:1.3μm、厚み:18μm)
銅箔-7:分子中にアミノ基を有するシランカップリング剤で全面を表面処理した銅箔(三井金属鉱業株式会社製のMLS-G、アミノシラン処理を施した銅箔、M面クロム付着量:2.2原子%、M面の十点平均粗Rz:2.8μm、厚み:18μm)
得られた銅張積層板に対して、塩化第二銅溶液(液温45℃)を用い、90秒間エッチングし、その後、市水又は純水を用い、常温で水洗した。そうすることによって、前記銅箔が除去された。
X線ビーム径:約100μmφ(25W、15kV)
分析領域:約100μmφ
上記測定により得られた値を、上記装置に備えられる解析ソフトに組み込まれた相対感度係数を用いて、定量換算した。
前記露出面の表面粗さ(十点平均粗さRz)を、ここでの表面粗さである十点平均粗さRzは、JIS B 0601:1994に準拠し、株式会社東京精密製の表面粗さ形状測定機(SURFCOM500DX)を用いて測定した。
前記銅張積層板(評価基板)を、以下に示す方法により評価を行った。
評価基板(金属張積層板)の一方の金属箔(銅箔)を加工して、線幅100~300μm、線長1000mm、線間20mmの配線を10本形成させた。この配線を形成させた基板の、配線を形成させた側の表面上に、前記プリプレグ2枚及び金属箔(銅箔)を2次積層することによって、3層板を作製した。なお、配線の線幅は、3層板を作製した後の配線の特性インピーダンスが50Ωとなるように調整した。
前記評価基板を作製する際に、全面エッチング処理した銅張積層板に対して、プリプレグを表裏に一枚ずつ重ね、温度200℃、圧力3MPaの条件で100分間加熱・加圧することによって、両面に銅箔が接着された銅張積層板を得た。この形成された銅張積層板を50mm×50mmに切断し、両面銅箔をエッチングして除去した。このようにして得られた評価用積層体を、288℃の半田槽中に30秒間浸漬した。そして、浸漬した積層体に、膨れの発生の有無を目視で観察した。この観察を2つの積層体に対して行った。膨れの発生が確認されなければ(膨れの発生数が0であれば)、「○」と評価した。また、膨れの発生数が1であれば、「△」と評価し、膨れの発生数が2であれば、「×」と評価した。
前記半田耐熱性の評価と同様にして、評価用積層体を得て、その評価用積層体を288℃の半田槽中に30秒間浸漬する前に、沸騰したイオン交換水に4時間浸漬させたこと以外、前記半田耐熱性の評価と同様にした。評価基準も、前記半田耐熱性の評価と同様にした。
前記半田耐熱性の評価と同様にして、評価用積層体を得て、その評価用積層体を288℃の半田槽中に30秒間浸漬する前に、沸騰したイオン交換水に6時間浸漬させたこと以外、前記半田耐熱性の評価と同様にした。評価基準も、前記半田耐熱性の評価と同様にした。
Claims (8)
- 絶縁層と、前記絶縁層の少なくとも一方の表面に接触して存在する銅箔とを備える銅張積層板であって、
前記絶縁層は、炭素-炭素不飽和二重結合を有する置換基により末端変性された変性ポリフェニレンエーテル化合物を含有する樹脂組成物の硬化物を含み、
前記銅張積層板を塩化銅溶液でエッチング処理して前記絶縁層が露出された露出面における、X線光電子分光法により測定されるクロム元素量が、X線光電子分光法により測定される全元素量に対して、7.5原子%以下であり、
前記露出面の表面粗さが、十点平均粗さで2.0μm以下であることを特徴とする銅張積層板。 - 前記露出面には、X線光電子分光法により確認可能な窒素元素が存在する請求項1又は請求項2に記載の銅張積層板。
- 前記露出面における、X線光電子分光法により測定される窒素元素量が、X線光電子分光法により測定される全元素量に対して、1.0原子%以上である請求項1~3のいずれか1項に記載の銅張積層板。
- 前記窒素元素は、アミノ基を有する化合物に含まれる窒素原子由来である請求項3又は請求項4に記載の銅張積層板。
- 請求項1~5のいずれか1項に記載の銅張積層板に備えられる前記銅箔を部分的に除去されてなる配線と、前記絶縁層とを備えることを特徴とする配線板。
- 前記絶縁層を複数層有し、
前記配線が、前記絶縁層と前記絶縁層との間に配置される請求項6に記載の配線板。 - 樹脂層と、前記樹脂層の少なくとも一方の表面に接触して存在する銅箔とを備える樹脂付き銅箔であって、
前記樹脂層は、炭素-炭素不飽和二重結合を有する置換基により末端変性された変性ポリフェニレンエーテル化合物を含有する樹脂組成物又は前記樹脂組成物の半硬化物を含み、
前記樹脂層を硬化させた前記樹脂付き銅箔を塩化銅溶液でエッチング処理して硬化後の前記樹脂層が露出された露出面における、X線光電子分光法により測定されるクロム元素量が、X線光電子分光法により測定される全元素量に対して、7.5原子%以下であり、
前記露出面の表面粗さが、十点平均粗さで2.0μm以下であることを特徴とする樹脂付き銅箔。
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- 2019-09-27 CN CN201980064349.2A patent/CN112789167A/zh active Pending
- 2019-09-27 KR KR1020217011712A patent/KR20210070310A/ko not_active Application Discontinuation
- 2019-09-27 US US17/281,845 patent/US11895770B2/en active Active
- 2019-09-27 WO PCT/JP2019/038309 patent/WO2020071287A1/ja active Application Filing
- 2019-09-27 JP JP2020550403A patent/JP7445830B2/ja active Active
- 2019-10-02 TW TW108135745A patent/TW202019692A/zh unknown
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Also Published As
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JP7445830B2 (ja) | 2024-03-08 |
JPWO2020071287A1 (ja) | 2021-09-02 |
CN112789167A (zh) | 2021-05-11 |
KR20210070310A (ko) | 2021-06-14 |
US20220015230A1 (en) | 2022-01-13 |
TW202019692A (zh) | 2020-06-01 |
US11895770B2 (en) | 2024-02-06 |
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