WO2013125558A1 - 配線基板、これを用いた実装構造体および配線基板の製造方法 - Google Patents
配線基板、これを用いた実装構造体および配線基板の製造方法 Download PDFInfo
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- WO2013125558A1 WO2013125558A1 PCT/JP2013/054120 JP2013054120W WO2013125558A1 WO 2013125558 A1 WO2013125558 A1 WO 2013125558A1 JP 2013054120 W JP2013054120 W JP 2013054120W WO 2013125558 A1 WO2013125558 A1 WO 2013125558A1
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- 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
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/036—Multilayers with layers of different types
-
- 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
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4602—Manufacturing multilayer circuits characterized by a special circuit board as base or central core whereon additional circuit layers are built or additional circuit boards are laminated
-
- 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
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
- H05K3/4661—Adding a circuit layer by direct wet plating, e.g. electroless plating; insulating materials adapted therefor
-
- 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
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
- H05K3/467—Adding a circuit layer by thin film methods
-
- 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
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
- H05K3/4673—Application methods or materials of intermediate insulating layers not specially adapted to any one of the previous methods of adding a circuit layer
-
- 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
- H05K2201/0175—Inorganic, non-metallic layer, e.g. resist or dielectric for printed capacitor
-
- 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
- H05K2201/0183—Dielectric layers
- H05K2201/0195—Dielectric or adhesive layers comprising a plurality of layers, e.g. in a multilayer structure
-
- 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
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0206—Materials
- H05K2201/0209—Inorganic, non-metallic particles
-
- 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
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0263—Details about a collection of particles
- H05K2201/0269—Non-uniform distribution or concentration of particles
-
- 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
- H05K2201/06—Thermal details
- H05K2201/068—Thermal details wherein the coefficient of thermal expansion is important
-
- 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
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3431—Leadless components
- H05K3/3436—Leadless components having an array of bottom contacts, e.g. pad grid array or ball grid array components
Definitions
- the present invention relates to a wiring board used for electronic equipment (for example, various audiovisual equipment, home appliances, communication equipment, computer equipment and peripheral devices thereof), a mounting structure using the wiring board, and a method of manufacturing the wiring board. .
- this wiring board for example, a wiring board having an insulating layer made of a resin material, such as that disclosed in Japanese Patent Laid-Open No. 8-118194, is used.
- a resin material having a larger thermal expansion coefficient than that of the electronic component is used for the insulating layer, the thermal expansion coefficient of the wiring board tends to be larger than the thermal expansion coefficient of the electronic component.
- connection reliability between the wiring board and the electronic component is likely to be lowered, and the electrical reliability of the mounting structure is likely to be lowered.
- An object of the present invention is to provide a wiring board that meets the demand for improving the electrical reliability of a mounting structure, a mounting structure using the wiring board, and a method for manufacturing the wiring board.
- the wiring board in one embodiment of the present invention includes an inorganic insulating layer, a first resin layer formed on one main surface of the inorganic insulating layer, and a second resin layer formed on the other main surface of the inorganic insulating layer. And a conductive layer partially formed on one main surface of the second resin layer opposite to the inorganic insulating layer.
- the inorganic insulating layer includes a plurality of first inorganic insulating particles partially connected to each other, and a gap surrounded by the plurality of first inorganic insulating particles is formed. A part of the first resin layer and a part of the second resin layer enter the gap.
- a mounting structure in an embodiment of the present invention includes the above-described wiring board and an electronic component mounted on one main surface of the wiring board on the second resin layer side.
- a method for manufacturing a wiring board according to an embodiment of the present invention includes a plurality of first inorganic insulating particles partially connected to each other, and an inorganic insulating material in which a gap surrounded by the plurality of first inorganic insulating particles is formed. Providing a layer. Moreover, the manufacturing method mentioned above is equipped with the process of arrange
- the inorganic insulating layer in which the first resin precursor is disposed is heated and pressurized at a temperature lower than the curing start temperature of the first resin material, and the gap of the inorganic insulating layer is increased.
- the manufacturing method mentioned above heats the said inorganic insulating layer and the said 1st resin precursor at the temperature more than the curing start temperature of the said 1st resin material, and makes the said 1st resin precursor a 1st resin layer.
- a process is provided.
- the inorganic insulating layer in which the second resin precursor is disposed is heated and pressurized at a temperature lower than the curing start temperature of the second resin material, and the gap between the inorganic insulating layers is increased.
- the manufacturing method mentioned above heats the said inorganic insulating layer and the said 2nd resin precursor at the temperature more than the hardening start temperature of the said 2nd resin material, and makes the said 2nd resin precursor a 2nd resin layer.
- a process is provided.
- the manufacturing method described above includes a step of forming a conductive layer on one main surface of the second resin layer opposite to the inorganic insulating layer.
- the insulating layer includes the inorganic insulating layer disposed between the first resin layer and the second resin layer, the thermal expansion coefficient of the insulating layer is reduced. Can do. Therefore, since the connection reliability between the wiring board and the electronic component can be increased, the electrical reliability of the mounting structure can be improved.
- the mounting structure in one embodiment of the present invention since the wiring board described above is provided, the electrical reliability of the mounting structure can be improved.
- a wiring board having excellent connection reliability with an electronic component can be manufactured, and thus the electrical reliability of the mounting structure can be improved.
- the mounting structure 1 shown in FIG. 1 is used for electronic devices such as various audiovisual devices, home appliances, communication devices, computer devices or peripheral devices thereof.
- the mounting structure 1 includes an electronic component 2 and a wiring board 3 on which the electronic component 2 is mounted on one main surface.
- the electronic component 2 is flip-chip mounted on the wiring board 3 via bumps 4 containing a conductive material such as solder.
- a semiconductor element such as an IC or an LSI can be used.
- the electronic component 2 is made of a semiconductor material such as silicon, germanium, gallium arsenide, gallium arsenide phosphorus, gallium nitride, or silicon carbide.
- the thickness of the electronic component 2 is, for example, 0.05 mm or more and 1 mm or less.
- the thermal expansion coefficient in the plane direction (XY plane direction) of the electronic component 2 is, for example, 3 ppm / ° C. or more and 5 ppm / ° C. or less.
- the thickness of the electronic component 2 is determined by observing the cross section of the electronic component 2 with a scanning electron microscope or a transmission electron microscope, measuring the length along the thickness direction (Z direction) at 10 or more points, and calculating the average value. Measured by calculating.
- the coefficient of thermal expansion of the electronic component 2 is measured by a measuring method according to JIS K7197-1991 using a commercially available TMA apparatus.
- the thickness and the coefficient of thermal expansion of each member are measured in the same manner as the electronic component 2.
- the wiring substrate 3 includes a core substrate 5 and a pair of wiring layers 6 formed on both main surfaces of the core substrate 5.
- the thickness of the wiring board 3 is, for example, not less than 0.05 mm and not more than 1.5 mm.
- the Young's modulus of the wiring board 3 is, for example, 5 GPa or more and 30 GPa or less.
- the thermal expansion coefficient in the planar direction of the wiring board 3 is, for example, 4 ppm / ° C. or more and 20 ppm / ° C. or less.
- the Young's modulus of the wiring board 3 is obtained by dividing the tensile stress per unit cross-sectional area obtained by cutting a rectangular test piece from the wiring board 3 and measuring the test piece with a tensile tester by the amount of elongation of the resin. Can be measured.
- the Young's modulus of each member is measured in the same manner as the wiring board 3 unless otherwise specified.
- the core substrate 5 increases the Young's modulus of the wiring substrate 3.
- the core substrate 5 includes a base body 7, a pair of conductive layers 8A formed on both main surfaces of the base body 7, a cylindrical through-hole conductor 9 that electrically connects the pair of conductive layers 8A, and a cylindrical shape. And an insulator 10 filled in the through-hole conductor 9.
- the base body 7 increases the Young's modulus of the core substrate 5.
- the base body 7 is positioned on the main surface of the inorganic insulating layer 11A opposite to the first resin layer 12A, the first resin layer 12A positioned between the pair of inorganic insulating layers 11A, and the pair of inorganic insulating layers 11A. Second resin layer 13A.
- the inorganic insulating layer 11 ⁇ / b> A increases the Young's modulus of the base 7 and reduces the coefficient of thermal expansion of the base 7.
- the inorganic insulating layer 11A is composed of an inorganic insulating portion mainly composed of an inorganic insulating material, and a gap G is formed in the inorganic insulating portion. As shown in FIG. 2, in the gap G, a part of the first resin layer 12A and a part of the second resin layer 13A, which will be described later, enter.
- the thickness of the inorganic insulating layer 11A is, for example, 3 ⁇ m or more and 100 ⁇ m or less, which corresponds to, for example, 5% or more and 50% or less of the thickness of the first resin layer 12A.
- the Young's modulus of the inorganic insulating layer 11A is, for example, 20 GPa or more and 50 GPa or less.
- the thermal expansion coefficient in the planar direction of the inorganic insulating layer 11A is, for example, 0 ppm / ° C. or more and 10 ppm / ° C. or less. Note that the Young's modulus of the inorganic insulating layer 11A is measured by a measurement method according to ISO 527-1: 1993 using a nanoindenter.
- the content ratio of the inorganic insulating portion in the inorganic insulating layer 11A is, for example, 62 volume% or more and 75 volume% or less.
- the content ratio of the gap G in the inorganic insulating layer 11A is, for example, 25 volume% or more and 38 volume% or less.
- the content ratio of a part of the first resin layer 12A and a part of the second resin layer 13A in the gap G is, for example, 99.5% by volume or more and 100% by volume or less.
- the width of the gap G is, for example, not less than 10 nm and not more than 300 nm.
- the width of the gap G is determined by observing a cross section of the inorganic insulating layer 11A with a scanning electron microscope or a transmission electron microscope, photographing an enlarged cross section so as to include the gap G of 20 to 50, and expanding the cross section.
- the average value of the maximum diameters of the respective gaps G is obtained by regarding the width of the gap G.
- the inorganic insulating part includes a plurality of first inorganic insulating particles 14 made of an inorganic insulating material.
- the inorganic insulating material has a smaller coefficient of thermal expansion than the resin material, the coefficient of thermal expansion of the inorganic insulating part is small. Therefore, when the first resin layer 12A and the second resin layer 13A formed on both main surfaces of the inorganic insulating layer 11A are thermally expanded, the inorganic insulating layer 11A restrains the first resin layer 12A and the second resin layer 13A. Therefore, the thermal expansion coefficient of the base body 7 can be reduced.
- the plurality of first inorganic insulating particles 14 included in the inorganic insulating portion are connected to each other so as to form the neck N, and a gap G surrounded by the first inorganic insulating particles 14 connected to each other is formed. Is formed. A part of the first resin layer 12A and a part of the second resin layer 13A enter the gap G. As a result, the adhesive strength between part of the first resin layer 12A and the second resin layer 13A and the inorganic insulating layer 11A can be improved. Accordingly, it is possible to reduce the separation of the first resin layer 12A and the second resin layer 13A from the inorganic insulating layer 11A.
- the plurality of first inorganic insulating particles 14 are connected to each other, the plurality of first inorganic insulating particles 14 are bound to each other.
- the Young's modulus of the inorganic insulating layer 11A can be improved. Accordingly, when the first resin layer 12A and the second resin layer 13A are thermally expanded, the inorganic insulating layer 11A can favorably restrain the first resin layer 12A and the second resin layer 13A, and the thermal expansion of the base body 7 is achieved. The rate can be further reduced.
- the first inorganic insulating particles 14 are made of an inorganic insulating material such as silicon oxide, aluminum oxide, magnesium oxide or calcium oxide. Among these, it is desirable to use silicon oxide. Since silicon oxide has a lower dielectric loss tangent than other inorganic insulating materials, the signal transmission characteristics of the conductive layer 8A can be improved.
- the first inorganic insulating particles 14 are preferably made of an amorphous material. As a result, the anisotropy of the thermal expansion coefficient due to the crystal structure of the first inorganic insulating particles 14 can be reduced, and the generation of cracks in the inorganic insulating layer 11A can be reduced.
- the average particle diameter of the first inorganic insulating particles 14 is, for example, not less than 3 nm and not more than 110 nm.
- the Young's modulus of the first inorganic insulating particles 14 is, for example, 10 GPa or more and 100 GPa or less.
- the coefficient of thermal expansion of the first inorganic insulating particles 14 is, for example, not less than 0.5 ppm / ° C. and not more than 15 ppm / ° C. Note that the average particle size of the first inorganic insulating particles 14 was expanded to include 20 to 50 particles by observing the polished surface or fractured surface of the inorganic insulating layer 11A with a field emission electron microscope.
- the average particle diameter of each member is measured in the same manner as the first inorganic insulating particles 14 unless otherwise specified.
- the inorganic insulating part desirably includes the second inorganic insulating particles 15 having an average particle diameter larger than that of the first inorganic insulating particles 14.
- the inorganic insulating part is formed by connecting the plurality of first inorganic insulating particles 14 to each other and the first inorganic insulating particles 14 and the second inorganic insulating particles 15 in part.
- the average particle size of the second inorganic insulating particles 15 is larger than the average particle size of the first inorganic insulating particles 14, when cracks occur in the inorganic insulating portion, the cracks cause the second inorganic insulating particles 15 to break. Since a large amount of energy is required for detouring, this crack extension can be suppressed.
- the second inorganic insulating particles 15 are made of the same material as the first inorganic insulating particles 14, for example, and have the same characteristics. Among these, it is desirable to use the same material as the first inorganic insulating particles 14 for the second inorganic insulating particles 15.
- the average particle diameter of the second inorganic insulating particles 15 is, for example, not less than 0.5 ⁇ m and not more than 5 ⁇ m.
- the average particle size of the second inorganic insulating particles 15 is determined by first observing the cross section of the inorganic insulating layer 11A with a scanning electron microscope or a transmission electron microscope, and paying attention to at least 30 particles in the cross section.
- each particle was polished by 0.2 ⁇ m, the particle size of these particles was measured at each polishing cross section, the value showing the maximum diameter of the focused particle was regarded as the diameter of each particle, and the average value thereof was calculated. calculate. Then, this average value is obtained by measuring at least 30 arbitrary selected cross sections and further calculating the average value calculated at each cross section.
- the content ratio of the first inorganic insulating particles 14 in the inorganic insulating part is, for example, 20% by volume or more and 90% by volume or less.
- the content ratio of the second inorganic insulating particles 15 in the inorganic insulating part is, for example, 10% by volume to 80% by volume.
- the first resin layer 12 ⁇ / b> A is a main part of the base body 7.
- the first resin layer 12A includes, for example, a first resin portion 16A, a base material 17 covered with the first resin portion 16A, and filler particles 19 covered with the first resin portion 16A. A part of the first resin portion 16A enters the gap G, so that a part of the first resin layer 12A enters the gap G.
- the thickness of the first resin layer 12A is, for example, not less than 0.01 mm and not more than 0.3 mm.
- the Young's modulus of the first resin layer 12A is, for example, not less than 0.2 GPa and not more than 20 GPa.
- the thermal expansion coefficient in the planar direction of the first resin layer 12A is, for example, 3 ppm or more and 20 ppm or less.
- the content ratio of the base material 17 in the first resin layer 12A is, for example, 20% by volume or more and 50% by volume or less.
- the content ratio of the filler particles 19 in the first resin layer 12A is, for example, 10% by volume or more and 40% by volume or less.
- the first resin portion 16A is a main portion of the first resin layer 12A, and is made of a resin material such as an epoxy resin, a virmaleimide triazine resin, or a cyanate resin.
- the Young's modulus of the first resin portion 16A is, for example, not less than 0.1 GPa and not more than 5 GPa.
- the thermal expansion coefficient of the first resin portion 16A is, for example, 20 ppm / ° C. or more and 50 ppm / ° C. or less.
- the first resin portion 16A enters the gap G of the inorganic insulating layer 11A.
- the Young's modulus of the first resin portion 16A is smaller than the first inorganic insulating particles 14 and the second inorganic insulating particles 15, the first resin portion 16A relaxes the stress applied to the inorganic insulating layer 11A, Generation or extension of cracks in the inorganic insulating layer 11A can be reduced.
- the base material 17 increases the Young's modulus of the first resin layer 12A and reduces the thermal expansion coefficient in the planar direction of the first resin layer 12A.
- this base material 17 for example, a woven or non-woven fabric constituted by fibers or a fiber in which fibers are arranged in one direction can be used. Examples of the fibers include glass fibers, resin fibers, carbon fibers, or metal fibers. Etc.
- the Young's modulus of the base material 17 is, for example, 10 GPa or more and 25 GPa or less.
- the thermal expansion coefficient in the planar direction of the substrate 17 is, for example, not less than 2 ppm / ° C. and not more than 25 ppm / ° C.
- the filler particles 19 are dispersed in the first resin layer 12A, and increase the Young's modulus of the first resin layer 12A and reduce the thermal expansion coefficient of the first resin layer 12A.
- the filler particles 19 are made of an inorganic insulating material such as silicon oxide, aluminum oxide, aluminum nitride, aluminum hydroxide, or calcium carbonate, for example.
- the average particle diameter of the filler particles 19 is, for example, not less than 0.3 ⁇ m and not more than 5 ⁇ m.
- the Young's modulus of the filler particles 19 is, for example, 40 GPa or more and 90 GPa or less.
- the thermal expansion coefficient of the filler particles 19 is, for example, 0 ppm / ° C. or more and 15 ppm / ° C. or less.
- the second resin layer 13A supports the conductive layer 8A described above.
- the second resin layer 13A includes, for example, a second resin portion 18A and filler particles 19 that are covered with the second resin portion 18A and dispersed in the second resin layer 13A.
- a part of the second resin portion 18A enters the gap G, and a part of the first resin layer 12A enters the gap G.
- the thickness of the second resin layer 13A is, for example, not less than 3 ⁇ m and not more than 20 ⁇ m.
- the Young's modulus of the second resin layer 13A is, for example, not less than 0.2 GPa and not more than 20 GPa.
- the thermal expansion coefficient in the planar direction of the second resin layer 13A is, for example, not less than 20 ppm / ° C. and not more than 70 ppm / ° C.
- the content ratio of the filler particles 19 in the second resin layer 13A is, for example, 10% by volume or more and 70% by volume or less.
- the second resin portion 18A is made of the same material as the first resin portion 16A, for example, and has the same characteristics.
- the second resin portion 18A enters the gap G of the inorganic insulating layer 11A. As a result, similarly to the first resin portion 16A, the stress applied to the inorganic insulating layer 11A can be relaxed.
- the conductive layer 8A disposed on both main surfaces of the base 7 is made of a conductive material such as copper, silver, gold, or aluminum.
- the thickness of the conductive layer 8A is, for example, 3 ⁇ m or more and 20 ⁇ m or less.
- the Young's modulus of the conductive layer 8A is, for example, 80 GPa or more and 200 GPa or less.
- the thermal expansion coefficient in the planar direction of the conductive layer 8A is, for example, not less than 16 ppm / ° C. and not more than 18 ppm / ° C.
- the through-hole conductor 9 penetrates the base body 7 in the thickness direction, and is intended to electrically connect a pair of conductive layers 8A formed on both main surfaces of the base body 7.
- the through-hole conductor 9 is made of the same material as that of the conductive layer 8A, for example, and has the same characteristics.
- the through-hole conductor 9 is formed in a cylindrical shape along the inner wall of a columnar through-hole T that penetrates the base body 7 in the thickness direction.
- the diameter of the through hole T is, for example, not less than 0.1 mm and not more than 1 mm.
- An insulator 10 made of a resin material such as an epoxy resin is disposed inside the cylindrical through-hole conductor 9.
- the through hole conductor 9 may be filled in the through hole T.
- the wiring layers 6 disposed on both main surfaces of the core substrate 5 described above include the inorganic insulating layer 11B, the first resin layer 12B formed on one main surface of the inorganic insulating layer 11B, and the other main layers of the inorganic insulating layer 11B.
- the inorganic insulating layer 11B improves the Young's modulus of the wiring layer 6 and reduces the coefficient of thermal expansion of the wiring layer 6.
- the inorganic insulating layer 11B is made of, for example, the same material as that of the inorganic insulating layer 11A and has the same structure and characteristics. A part of the first resin layer 12B and a part of the second resin layer 13B enter the gap G of the inorganic insulating layer 11B.
- the first resin layer 12B functions as an adhesive layer between the inorganic insulating layer 11B and another member.
- the first resin layer 12B includes, for example, the first resin portion 16B and the filler particles 19 covered with the first resin portion 16B.
- the first resin layer 12B is made of the same material as the second resin layer 13A and has the same structure. And has characteristics. Part of the first resin portion 16B enters the gap G, so that part of the first resin layer 12B enters the gap G.
- the second resin layer 13B supports the conductive layer 8B.
- the second resin layer 13B includes the second resin portion 18B and filler particles 19 that are covered and dispersed by the second resin portion 18B.
- the second resin layer 13B is made of the same material as the second resin layer 13A. Have similar structure and properties. Part of the second resin portion 18B enters the gap G, so that part of the second resin layer 12B enters the gap G.
- the conductive layer 8B is partially formed on the main surface of the second resin layer 13B opposite to the inorganic insulating layer 11B, and functions as a ground wiring, a power supply wiring, or a signal wiring.
- the conductive layer 8B is made of the same material as that of the conductive layer 8A, for example, and has the same structure and characteristics.
- the third resin layer 20 covers the conductive layer 8B partially formed on the second resin layer to reduce short circuit between the conductive layers 8B in the planar direction, and is the same as the first resin layer 12B. It is the composition. As shown in FIG. 1, the first resin layer 12 ⁇ / b> B and the third resin layer 20 are the same insulating layers. However, when attention is paid to one inorganic insulating layer 11, the first resin layer 12 ⁇ / b> B and the third resin layer 20 directly What is in contact is the first resin layer 12B, and what is not in direct contact with the inorganic insulating layer 11 is the third resin layer 20.
- the via conductor 21 electrically connects the plurality of conductive layers 8B in the thickness direction, and penetrates the first resin layer 12B, the inorganic insulating layer 11B, and the second resin layer 13B.
- the via conductor 21 is made of, for example, the same material as that of the conductive layer 8A and has the same structure and characteristics.
- the second resin layer 13 is interposed between the inorganic insulating layer 11 and the conductive layer 8.
- the second resin layer 13 has a smaller Young's modulus than the inorganic insulating layer 11 and the conductive layer 8 compared to the case where the conductive layer 8 is formed directly on the inorganic insulating layer 11.
- the thermal stress caused by the difference in thermal expansion coefficient between the insulating layer 11 and the conductive layer 8 can be relaxed, and the peeling of the conductive layer 8 from the inorganic insulating layer 11 can be reduced.
- the second resin portion 18 enters the gap G of the inorganic insulating layer 11, an anchor effect is generated, and the second resin layer 13 and the plurality of first inorganic insulating particles 14 included in the inorganic insulating layer 11 are included.
- the contact area with the plurality of second inorganic insulating particles 15 is increased.
- the adhesive strength between the second resin layer 13 and the inorganic insulating layer 11 is improved, the peeling of the conductive layer 8 from the inorganic insulating layer 11 can be satisfactorily reduced.
- first resin layer 12 and the second resin layer 13 having a Young's modulus smaller than that of the inorganic insulating layer 11 are formed on both main surfaces of the inorganic insulating layer 11.
- the first resin layer 12 and the second resin layer 13 are deformed, and the stress applied to the inorganic insulating layer 11 can be relaxed. It is possible to reduce the occurrence of cracks in 11 and favorably reduce the disconnection of the conductive layer 8 due to the cracks.
- first resin layer 12 and the second resin layer 13 enter the gap G of the inorganic insulating layer 11.
- first resin layer 12 and the second resin layer 13 can be satisfactorily reduced from being peeled off from the inorganic insulating layer 11, so that the conductive layers 8 or the through-hole conductors 9 adjacent to each other in the plane direction or The occurrence of migration between via conductors 21 can be satisfactorily reduced.
- the first resin layer 12 and the second resin layer 13 that have entered the gap G are preferably connected in the gap G.
- the gap G is filled with a part of the first resin layer 12 and a part of the second resin layer 13, the occurrence of migration between the through-hole conductors 9 and the via conductors 21 adjacent in the plane direction. Can be reduced satisfactorily.
- the first resin layer 12 and the second resin layer 13 that have entered the gap G are connected by a curved surface in the gap G.
- the connection area between the first resin layer 12 and the second resin layer 13 is increased, the adhesive strength can be improved. Therefore, since the peeling between the first resin layer 12 and the second resin layer 13 that have entered the gap G can be reduced satisfactorily, the migration between the through-hole conductors 9 adjacent to each other in the planar direction and between the via conductors 21 is also possible. Can be satisfactorily reduced. Further, when the wiring board 3 is heated, blistering due to moisture entering the peeled portion can be reduced.
- the content ratio of the filler particles 19 in the region on the conductive layer 8 side is smaller than the content ratio of the filler particles 19 in the region on the inorganic insulating layer 11 side. desirable.
- the region of the second resin layer 13 on the conductive layer 8 side and the conductive layer 8 It is possible to reduce the coefficient of thermal expansion. Therefore, it is possible to satisfactorily reduce the peeling between the second resin layer 13 and the conductive layer 8 while reducing the peeling between the second resin layer 13 and the inorganic insulating layer 11.
- the second resin layer 13 located on one main surface of the inorganic insulating layer 11 is divided into two in the planar direction so that the thickness is uniform, and the one close to the inorganic insulating layer 11 is defined as the first region, and the conductive layer 8
- the ratio of the number of filler particles 19 located in the first region of the filler particles 19 in the second resin layer 13 is, for example, 55% or more and 70% or more
- the ratio of the number of filler particles 19 located in the two regions is, for example, 30% or more and 45% or more.
- the third resin layer 20 is preferably made of the same resin material as the second resin layer 13. As a result, since the adhesive strength between the second resin layer 13 and the third resin layer 20 can be improved, peeling between the second resin layer 13 and the third resin layer 20 can be reduced.
- the content ratio of the filler particles 19 in the region on the conductive layer 8 side is smaller than the content ratio of the filler particles 19 in the region on the opposite side to the conductive layer 8. Is desirable. As a result, the difference in the coefficient of thermal expansion between the region on the conductive layer 8 side of the third resin layer 20 and the region on the conductive layer 8 side of the second resin layer 13 can be reduced. Separation from the three resin layers 20 can be reduced.
- the third resin layer 20 located on one main surface of the inorganic insulating layer 11 is divided into two parts in the plane direction so that the thickness is uniform, and the one farther from the conductive layer 8 is defined as the first region.
- the ratio of the number of filler particles 19 located in the first region out of the filler particles 19 in the third resin layer 20 is, for example, 55% or more and 70% or more.
- the ratio of the number of filler particles 19 located in the region is, for example, 30% or more and 45% or more.
- the content ratio of the second inorganic insulating particles 15 in the region on the second resin layer 13 side is the second inorganic insulating particles 15 in the region on the first resin layer 12 side. It may be larger than the content ratio.
- An inorganic insulating sol 11x having a solid content including the first inorganic insulating particles 14 and the second inorganic insulating particles 15 and a solvent in which the solid content is dispersed is prepared.
- the solid content in the inorganic insulating sol 11x is, for example, 10% by volume to 50% by volume. By setting it as 10 volume% or more, while reducing the viscosity of the inorganic insulating sol 11x, by setting it as 50 volume% or less, the productivity of the inorganic insulating layer 11 formed from the inorganic insulating sol 11x can be improved. Further, the content ratio of the solvent in the inorganic insulating sol 11x is, for example, 50% by volume or more and 90% by volume or less.
- the content ratio of the first inorganic insulating particles 14 in the solid content of the inorganic insulating sol 11x is, for example, 20% by volume or more and 90% by volume or less, and the content ratio of the second inorganic insulating particles 15 in the solid content of the inorganic insulating sol 11x is For example, it is 10 volume% or more and 80 volume% or less.
- Solvents contained in the inorganic insulating sol 11x are, for example, methanol, isopropanol, n-butanol, ethylene glycol, ethylene glycol monopropyl ether, methyl ethyl ketone, methyl isobutyl ketone, xylene, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, dimethylacetamide. And / or an organic solvent containing a mixture of two or more selected from these may be used.
- a support sheet 22 formed of a resin material such as PET resin or a metal material such as copper is prepared, and an inorganic insulating sol 11x is applied to one main surface of the support sheet 22. Apply.
- the inorganic insulating sol 11x can be applied using, for example, a dispenser, a bar coater, a die coater, or screen printing.
- the inorganic insulating sol 11x contracts as the solvent evaporates, but the solvent is contained in the gap G surrounded by the first inorganic insulating particles 14 and the second inorganic insulating particles 18, and the first inorganic insulating sol 11x.
- the particles 14 and the second inorganic insulating particles 18 themselves are not included.
- the inorganic insulating sol 11x includes the second inorganic insulating particles 15 having a large average particle diameter, the gap G is reduced correspondingly, and the region filled with the solvent is reduced.
- the solvent evaporates the amount of shrinkage of the solid content of the inorganic insulating sol 11x is reduced.
- the generation of cracks due to the shrinkage of the solid content of the inorganic insulating sol 11x can be reduced. Even if a crack occurs, the extension of the crack can be suppressed by the second inorganic insulating particles 15 having a large average particle diameter.
- the inorganic insulating sol 11x is dried by, for example, heating and air drying.
- the drying temperature is, for example, 20 ° C. or more and lower than the boiling point of the solvent (the boiling point of the lowest boiling solvent when two or more solvents are mixed), and the drying time is, for example, 20 seconds to 30 minutes. is there.
- the inorganic insulating sol 11x in the present embodiment includes the first inorganic insulating particles 14 having a small average particle diameter.
- the heating temperature of the inorganic insulating sol 11x is relatively low, for example, less than the crystallization start temperature of the first inorganic insulating particles 14 and the second inorganic insulating particles 15, the first inorganic insulating particles 14 are bonded together. It can be firmly connected.
- the heating temperature of the inorganic insulating sol 11 x is lower than the crystallization start temperature of the first inorganic insulating particles 14 and the second inorganic insulating particles 15.
- the crystallized particles can be prevented from shrinking due to phase transition, and the occurrence of cracks in the inorganic insulating layer 11 can be reduced.
- the first inorganic insulating particles 14 and the second inorganic insulating particles 15 maintain the shape of the particles, while the first inorganic insulating particles 14 and the first inorganic insulating particles 14 and the first inorganic insulating particles 14 2
- the inorganic insulating particles 15 can be connected only in the proximity region.
- the first inorganic insulating particles 14 and the first inorganic insulating particles 14 and the second inorganic insulating particles 15 can be connected to each other.
- the open pore gap G can be easily formed between the first inorganic insulating particles 14. Can be formed.
- the temperature at which the first inorganic insulating particles 14 can be firmly connected is, for example, about 250 ° C. when the average particle size of the first inorganic insulating particles 14 is 110 nm or less, and the average particle size is 15 nm. When it is below, it is about 150 degreeC.
- the crystallization start temperature of silicon oxide contained in the first inorganic insulating particles 14 and the second inorganic insulating particles 18 is about 1300 ° C.
- the heating temperature of the inorganic insulating sol 11x is, for example, 100 ° C. or more and less than 700 ° C., and the heating time is, for example, 0.5 hour or more and 24 hours or less.
- the laminated sheet 23 including the support sheet 22 and the inorganic insulating layer 11 formed on one main surface of the support sheet 22 is produced.
- the uncured first resin material 16Ax, the base material 17 coated with the uncured first resin material 16Ax, and the uncured first resin material 16Ax are coated.
- the first resin precursor 12Ax including the filler particles 19 thus prepared is prepared, and the inorganic insulating layer 11A of the laminated sheet 23 is laminated on both main surfaces of the first resin precursor 12Ax.
- the inorganic resin layer 11A and the first resin precursor 12Ax are heated and pressurized to cure the uncured first resin material 16Ax, thereby forming the first resin layer 12A.
- the uncured first resin material 16Ax enters a part of the gap G of the inorganic insulating layer 11A, and the first resin material 16Ax is cured to become the first resin portion 16A.
- a part of the resin layer 12A enters the inorganic insulating layer 11A.
- the support sheet 22 is peeled from the inorganic insulating layer 11A, and one main surface of the inorganic insulating layer 11A is exposed.
- the uncured resin is a resin in an A-stage or B-stage conforming to ISO 472: 1999.
- the heating and pressing of the inorganic insulating layer 11A and the first resin precursor 12Ax are performed until the uncured first resin material 16Ax enters the gap G between the inorganic insulating layers 11A until the curing start temperature of the uncured first resin material 16Ax. At a temperature below. As a result, the uncured first resin material 16Ax fluidizes and well enters the gap G of the inorganic insulating layer 11A. Thereafter, heating and pressurization are performed at a temperature that is equal to or higher than the curing start temperature of the uncured first resin material 16Ax and lower than the thermal decomposition temperature. As a result, the first resin material 16Ax that has entered the gap G of the inorganic insulating layer 11A is cured to form the first resin portion 16A.
- the heating temperature is, for example, 110 ° C. or more and 180 ° C. or less
- the pressing pressure is, for example, 2 MPa or more and 3 MPa or less
- the heating time is, for example, 0 .5 hours or more and 2 hours or less.
- the heating temperature is, for example, 190 ° C. or more and 230 ° C. or less
- the pressing pressure is, for example, 2 MPa or more and 3 MPa or less
- the heating time is, for example, 0.5 hours or more and 2 hours or less.
- the curing start temperature is a temperature at which the resin becomes a C-stage according to ISO 472: 1999.
- the thermal decomposition temperature is a temperature at which the mass of the resin is reduced by 5% in thermogravimetry according to ISO11358: 1997.
- a second resin precursor 13Ax including uncured second resin material 18Ax and filler particles 19 covered with uncured second resin material 18Ax is prepared. Then, the main surface of the inorganic insulating layer 11A opposite to the first resin layer 12A is laminated on both main surfaces of the second resin precursor 13Ax.
- the first resin layer 12A, the inorganic insulating layer 11A, and the second resin precursor 13Ax are heated and pressurized to cure the uncured second resin material 18Ax.
- a resin layer 13A is formed.
- the uncured second resin material 18Ax enters into a part of the gap G of the inorganic insulating layer 11A, and the second resin material 18Ax is cured to become the second resin portion 18A.
- a part of the resin layer 13A enters the inorganic insulating layer 11A.
- the first resin layer 12A, the inorganic insulating layer 11A, and the second resin precursor 13Ax are heated and pressed first until the uncured second resin material 18Ax enters the gap G of the inorganic insulating layer 11A.
- the temperature is lower than the curing start temperature of the resin material 18Ax.
- the uncured second resin material 18Ax fluidizes and well enters the gap G of the inorganic insulating layer 11A.
- heating is performed at a temperature equal to or higher than the curing start temperature of the uncured second resin material 18Ax and lower than the thermal decomposition temperature of the first resin material 16A and the second resin material 18A.
- the second resin material 18Ax that has entered the gap G of the inorganic insulating layer 11A is cured to form the second resin portion 18A.
- the heating temperature is, for example, 90 ° C. or more and 160 ° C. or less, and the pressing pressure is, for example, 0.1 MPa or more and 2 MPa or less.
- the subsequent heating is performed in an air atmosphere, the heating temperature is, for example, 190 ° C. or more and 230 ° C. or less, and the heating time is, for example, 0.5 hours or more and 2 hours or less.
- a through-hole conductor 9 that penetrates the base body 7 in the thickness direction is formed, and a conductive layer 8 ⁇ / b> A is formed on the base body 7. Specifically, this is performed as follows.
- a plurality of through holes T penetrating the substrate 7 in the thickness direction are formed by, for example, drilling or laser processing.
- a cylindrical through-hole conductor 9 is formed by depositing a conductive material on the inner wall of the through-hole T by, for example, electroless plating, vapor deposition, CVD, or sputtering.
- the inside of the cylindrical through-hole conductor 9 is filled with a resin material or the like to form the insulator 10.
- a conductive material is deposited on the exposed portion of the insulator 9 by, for example, an electroless plating method, a vapor deposition method, a CVD method, or a sputtering method.
- the conductive layer 8A is formed by patterning the deposited conductive material using a photolithographic technique and etching.
- the core substrate 5 is manufactured as described above.
- covered with uncured 1st resin material 16Bx. 12Bx is laminated.
- the inorganic insulating layer 11B is laminated on the main surface of the first resin precursor 12Bx opposite to the conductive layer 8A.
- the main surface of the inorganic insulating layer 11B opposite to the first resin precursor 12Bx includes the uncured second resin material 18Bx and the filler particles 19 covered with the uncured second resin material 18Bx.
- Two resin precursors 13Bx are laminated.
- the first resin precursor 12Bx, the inorganic insulating layer 11B, and the second resin precursor 13Bx are heated and pressurized at the same time, so that the uncured second resin material 16Bx and the uncured second resin material 16Bx.
- the first resin layer 12B and the second resin layer 13B are formed by curing the two resin material 18Bx.
- the uncured first resin material 16Bx and the uncured second resin material 18Bx enter the gap G of the inorganic insulating layer 11B, and the first resin material 16Bx and the second resin material 18Bx. Is cured to become the first resin portion 16B and the second resin portion 18B, and part of the first resin layer 12B and the second resin layer 13B enters the inorganic insulating layer 11B.
- the heating and pressurization of the first resin precursor 12Bx, the inorganic insulating layer 11B, and the second resin precursor 13Bx are performed by first placing the uncured first resin material 16Bx and the uncured second resin material 18Bx into the gap between the inorganic insulating layer 11B. Until it enters G, it is performed at a temperature lower than the curing start temperature of the uncured first resin material 16Bx and the uncured second resin material 18Bx. At this time, the uncured first resin material 16Bx and the uncured second resin material 18Bx are fluidized and well enter the gap G of the inorganic insulating layer 11A. Thereafter, heating is performed at a temperature that is equal to or higher than the curing start temperature of the uncured first resin material 16Bx and the uncured second resin material 18Bx and less than the thermal decomposition temperature.
- Each condition in the heating and pressing of the first resin precursor 12Bx, the inorganic insulating layer 11B, and the second resin precursor 13Bx is the same as the heating and pressing condition in the step (6), for example.
- the first resin layer 12B and the second resin layer 13B may not be formed at the same time.
- a via conductor 21 that penetrates the first resin layer 12B, the inorganic insulating layer 11B, and the second resin layer 13B in the thickness direction is formed, and the conductive material is formed on the second resin layer 13B.
- Layer 8B is formed. Specifically, this is performed as follows.
- via holes V are formed in the first resin layer 12B, the inorganic insulating layer 11B, and the second resin layer 13B by, for example, a YAG laser device or a carbon dioxide gas laser device, and the conductive layer 8 (here, At least part of the conductive layer 8A) is exposed.
- the via conductor 21 is formed in the via hole V and the conductive layer 8B is formed on the second resin layer 13B by, for example, a semi-additive method or a subtractive method.
- a pair of wiring layers 6 are formed on both main surfaces of the core substrate 5 by repeating the steps (8) to (9). Then, by repeating this step, the wiring layer 6 can be multi-layered.
- the wiring board 6 can be manufactured as described above.
- the mounting shown in FIG. 1 is performed by flip-chip mounting the electronic component 2 on the wiring board 3 via the bumps 4 on the surface of the main surface of the wiring board 3 where the second resin layer 13B is exposed.
- the structure 1 can be produced.
- the first resin material 16 and the second resin material 18 are inserted into the gap G from both main surfaces of the inorganic insulating layer 11.
- the resin material can be efficiently entered into the gap G.
- the generation of voids that are not present can be reduced.
- the resin material can be effectively infiltrated into the inorganic insulating layer 11.
- the inorganic insulating layer 11 can be thickened and the Young's modulus of the wiring board 3 can be increased. Therefore, since the warp and deformation of the wiring board 3 can be reduced, the yield when the electronic component 2 is mounted on the wiring board 3 can be improved.
- the first resin precursor 12x and the second resin precursor 13x preferably include a plurality of dispersed filler particles 19 that are larger than the width of the gap G.
- the uncured first resin material 16x and the second resin material 18x of the first resin precursor 12Bx and the second resin precursor 13x enter the inorganic insulating layer 11, so that the plurality of filler particles 19 become the inorganic insulating layer.
- the first resin layer 12 ⁇ / b> B and the second resin layer 12 ⁇ / b> B are aggregated so as to be filtered on the surface layer 11, and the content ratio of the filler particles 19 is larger in the region closer to the inorganic insulating layer 11 than in the region far from the inorganic insulating layer 11.
- the resin layer 13 can be formed. Therefore, it is possible to easily manufacture inclined members having different coefficients of thermal expansion at both ends of the first resin layer 12B and the second resin layer 13, thereby improving the yield.
- the content ratio of the filler particles 19 in the first resin precursor 12x is, for example, 10% to 55% by volume.
- the content ratio of the filler particles 19 in the second resin precursor 13x is the same as that of the first resin precursor 12x.
- the content rate of the filler particle 19 in the 1st resin layer 12 is 10 volume% or more and 70 volume% or less, for example.
- the content ratio of the filler particles 19 in the second resin layer 13 is the same as that of the first resin layer 12.
- the uncured first resin material 16x and the uncured second resin material 18x are composed of only monomers and oligomers before entering the gap G of the inorganic insulating layer 11.
- the monomer and oligomer have a smaller molecular weight than the polymer, and therefore can enter the gap G satisfactorily.
- the uncured first resin material 16x and the uncured second resin material 18x have a monomer ratio larger than the oligomer ratio before entering the gap G of the inorganic insulating layer 11.
- the monomer has a smaller molecular weight than the oligomer, and therefore can enter the gap G satisfactorily.
- the monomer is a monomer.
- An oligomer is a polymer having a relatively low molecular weight in which 10 to 300 monomers are bonded.
- a polymer is a polymer with more than 300 monomers attached.
- step (5) when the thickness of the inorganic insulating layer 11A formed on both main surfaces of the first resin layer 12A is larger than the thickness of the first resin layer 12A, the first resin material 16A is inorganic. It is possible to reduce more than necessary to enter the gap G of the insulating layer 11A, and to reduce the generation of bubbles in the base material 17 covered with the first resin material 16A.
- the inorganic insulating sol 11x applied to one main surface of the support sheet 22 is allowed to stand for a certain time, and the second inorganic insulating particles 15 having a larger average particle size and larger mass than the first inorganic insulating particles 14. May be allowed to settle in the inorganic insulating sol 11x to the support sheet side, and more second inorganic insulating particles 15 may be collected on the support sheet side.
- step (5) the width of the gap G of the inorganic insulating layer 11 on the first resin layer 12A side can be reduced, and the first resin material 16A can be prevented from entering the gap G more than necessary.
- production of the bubble in 12 A of 1st resin layers can be reduced favorably.
- the configuration using the wiring substrate in which the wiring layers are formed on both main surfaces of the core substrate has been described as an example.
- the wiring substrate having only the core substrate or the wiring having only the wiring layer is described.
- a substrate (coreless substrate) may be used.
- the wiring board may have a solder resist layer containing a resin material on the upper and lower surfaces.
- the description of the underfill is omitted, but the mounting structure may have an underfill between the wiring board and the electronic component.
- the configuration in which the core substrate and the wiring layer include the inorganic insulating layer has been described as an example.
- the core substrate or only the wiring layer may include the inorganic insulating layer.
- the configuration in which the first resin layer includes the base material has been described as an example.
- the first resin layer may not include the base material.
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Abstract
Description
以下に、本発明の一実施形態における配線基板を含む実装構造体を、図面を参照しつつ詳細に説明する。
次に、前述した実装構造体1の製造方法を、図5から図12を参照しつつ説明する。
2 電子部品
3 配線基板
4 バンプ
5 コア基板
6 配線層
7 基体
8,8A,8B 導電層
9 スルーホール導体
10 絶縁体
11,11A,11B 無機絶縁層
11x 無機絶縁ゾル
12,12A,12B 第1樹脂層
12x,12Ax,12Bx 第1樹脂前駆体
13,13A,13B 第2樹脂層
13x,13Ax,13Bx 第2樹脂前駆体
14 第1無機絶縁粒子
15 第2無機絶縁粒子
16,16A,16B 第1樹脂部
16x,16Ax,16Bx 未硬化の第1樹脂材料
17 基材
18,18A,18B 第2樹脂部
18x,18Ax,18Bx 未硬化の第2樹脂材料
19 フィラー粒子
20 第3樹脂層
21 ビア導体
22 支持シート
23 積層シート
B 接続面
G 間隙
N ネック
T スルーホール
V ビア孔
Claims (9)
- 無機絶縁層と、該無機絶縁層の一主面に形成された第1樹脂層と、前記無機絶縁層の他主面に形成された第2樹脂層と、該第2樹脂層の前記無機絶縁層と反対側の一主面に部分的に形成された導電層とを有し、
前記無機絶縁層は、互いに一部で接続した複数の第1無機絶縁粒子を含むとともに、該複数の第1無機絶縁粒子に囲まれた間隙が形成されており、
前記第1樹脂層の一部および前記第2樹脂層の一部は、前記間隙に入り込んでいることを特徴とする配線基板。 - 請求項1に記載の配線基板において、
前記第1樹脂層の一部は、前記間隙において、前記第2樹脂層の一部と接していることを特徴とする配線基板。 - 請求項1に記載の配線基板において、
前記第2樹脂層は、前記間隙の幅よりも平均粒径が大きい、無機絶縁材料からなる複数のフィラー粒子を含み、
該複数のフィラー粒子は、前記第2樹脂層中に分散しており、
該第2樹脂層において、前記無機絶縁層側の領域における前記フィラー粒子の含有割合は、前記導電層側の領域における前記フィラー粒子の含有割合よりも小さいことを特徴とする配線基板。 - 請求項1に記載の配線基板において、
前記第2樹脂層の一主面に、前記導電層を被覆して形成された第3樹脂層をさらに有し、
該第3樹脂層は、前記第2樹脂層と同じ樹脂材料からなることを特徴とする配線基板。 - 請求項4に記載の配線基板において、
前記第3樹脂層は、前記複数のフィラー粒子を含み、
該複数のフィラー粒子は、前記第3樹脂層中に分散しており、
該第3樹脂層において、前記導電層と反対側の領域における前記フィラー粒子の含有割合は、前記導電層側の領域における前記フィラー粒子の含有割合よりも小さいことを特徴とする配線基板。 - 請求項1に記載の配線基板と、該配線基板の前記第2樹脂層側の一主面に実装された電子部品とを備えた実装構造体。
- 互いに一部で接続した複数の第1無機絶縁粒子を含むとともに、該複数の第1無機絶縁粒子に囲まれた間隙が形成された無機絶縁層を準備する工程と、
前記無機絶縁層の一主面に未硬化の第1樹脂材料からなる第1樹脂前駆体を層状に配置する工程と、
前記無機絶縁層の他主面に未硬化の第2樹脂材料からなる前記第2樹脂前駆体を層状に配置する工程と、
前記第1樹脂前駆体が配置された前記無機絶縁層を前記第1樹脂材料の硬化開始温度未満の温度で加熱するとともに加圧して、前記無機絶縁層の前記間隙の一部に前記第1樹脂前駆体の一部を入り込ませる工程と、
前記無機絶縁層および前記第1樹脂前駆体を前記第1樹脂材料の硬化開始温度以上の温度で加熱して、前記第1樹脂前駆体を第1樹脂層にする工程と、
前記第2樹脂前駆体が配置された前記無機絶縁層を前記第2樹脂材料の硬化開始温度未満の温度で加熱するとともに加圧して、前記無機絶縁層の前記間隙の一部に前記第2樹脂前駆体の一部を入り込ませる工程と、
前記無機絶縁層および前記第2樹脂前駆体を前記第2樹脂材料の硬化開始温度以上の温度で加熱して、前記第2樹脂前駆体を第2樹脂層にする工程と、
前記第2樹脂層の前記無機絶縁層と反対側の一主面に導電層を形成する工程とを備えることを特徴とする配線基板の製造方法。 - 請求項7に記載の配線基板の製造方法において、
前記第1樹脂前駆体を第1樹脂層にする工程を、前記無機絶縁層の前記間隙の一部に、前記第2樹脂材料の一部を入り込ませる工程の前に行なうことを特徴とする配線基板の製造方法。 - 請求項8に記載の配線基板の製造方法において、
前記第2樹脂前駆体を層状に配置する工程で、前記無機絶縁層の他主面に、前記間隙の幅よりも平均粒径が大きい、無機絶縁材料からなる複数のフィラー粒子を分散させた前記第2樹脂前駆体を層状に配置することを特徴とする配線基板の製造方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US14/380,207 US9693451B2 (en) | 2012-02-23 | 2013-02-20 | Wiring board, mounting structure using same, and method of manufacturing wiring board |
CN201380010603.3A CN104137658B (zh) | 2012-02-23 | 2013-02-20 | 布线基板、使用了该布线基板的安装结构体以及布线基板的制造方法 |
JP2014500728A JP5710066B2 (ja) | 2012-02-23 | 2013-02-20 | 配線基板、これを用いた実装構造体および配線基板の製造方法 |
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JP2012037391 | 2012-02-23 | ||
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PCT/JP2013/054120 WO2013125558A1 (ja) | 2012-02-23 | 2013-02-20 | 配線基板、これを用いた実装構造体および配線基板の製造方法 |
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Country | Link |
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US (1) | US9693451B2 (ja) |
JP (2) | JP5710066B2 (ja) |
CN (1) | CN104137658B (ja) |
WO (1) | WO2013125558A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015064668A1 (ja) * | 2013-10-29 | 2015-05-07 | 京セラ株式会社 | 配線基板、これを用いた実装構造体および積層シート |
Families Citing this family (2)
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JP6884207B2 (ja) * | 2017-06-27 | 2021-06-09 | 京セラ株式会社 | 有機絶縁体、金属張積層板および配線基板 |
CN113625651B (zh) * | 2020-05-07 | 2023-01-13 | 福建师范大学 | 逻辑控制器 |
Citations (3)
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JPH04133386A (ja) * | 1990-02-06 | 1992-05-07 | Matsushita Electric Works Ltd | プリント回路用基板 |
JP2007281115A (ja) * | 2006-04-05 | 2007-10-25 | Murata Mfg Co Ltd | 多層回路基板およびその製造方法 |
JP2011159649A (ja) * | 2010-01-29 | 2011-08-18 | Kyocera Corp | 配線基板 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US5275878A (en) | 1990-02-06 | 1994-01-04 | Matsushita Electric Works, Ltd. | Composite dielectric and printed-circuit use substrate utilizing the same |
JPH08118194A (ja) | 1994-10-24 | 1996-05-14 | Mishima Kosan Co Ltd | 切粉分離排出装置 |
US8299366B2 (en) * | 2009-05-29 | 2012-10-30 | Ibiden Co., Ltd. | Wiring board and method for manufacturing the same |
US8461462B2 (en) * | 2009-09-28 | 2013-06-11 | Kyocera Corporation | Circuit substrate, laminated board and laminated sheet |
WO2011037260A1 (ja) * | 2009-09-28 | 2011-03-31 | 京セラ株式会社 | 構造体およびその製造方法 |
CN103052501B (zh) * | 2010-07-30 | 2015-08-26 | 京瓷株式会社 | 绝缘片、其制造方法及采用了该绝缘片的结构体的制造方法 |
-
2013
- 2013-02-20 JP JP2014500728A patent/JP5710066B2/ja active Active
- 2013-02-20 CN CN201380010603.3A patent/CN104137658B/zh not_active Expired - Fee Related
- 2013-02-20 US US14/380,207 patent/US9693451B2/en active Active
- 2013-02-20 WO PCT/JP2013/054120 patent/WO2013125558A1/ja active Application Filing
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2015
- 2015-02-24 JP JP2015034134A patent/JP2015099941A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04133386A (ja) * | 1990-02-06 | 1992-05-07 | Matsushita Electric Works Ltd | プリント回路用基板 |
JP2007281115A (ja) * | 2006-04-05 | 2007-10-25 | Murata Mfg Co Ltd | 多層回路基板およびその製造方法 |
JP2011159649A (ja) * | 2010-01-29 | 2011-08-18 | Kyocera Corp | 配線基板 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015064668A1 (ja) * | 2013-10-29 | 2015-05-07 | 京セラ株式会社 | 配線基板、これを用いた実装構造体および積層シート |
CN105637987A (zh) * | 2013-10-29 | 2016-06-01 | 京瓷株式会社 | 布线基板、使用了该布线基板的安装结构体以及层叠片 |
US20160242283A1 (en) * | 2013-10-29 | 2016-08-18 | Kyocera Corporation | Wiring board, and mounting structure and laminated sheet using the same |
JPWO2015064668A1 (ja) * | 2013-10-29 | 2017-03-09 | 京セラ株式会社 | 配線基板、これを用いた実装構造体および積層シート |
Also Published As
Publication number | Publication date |
---|---|
CN104137658B (zh) | 2017-03-08 |
US20150037611A1 (en) | 2015-02-05 |
JP5710066B2 (ja) | 2015-04-30 |
CN104137658A (zh) | 2014-11-05 |
US9693451B2 (en) | 2017-06-27 |
JPWO2013125558A1 (ja) | 2015-07-30 |
JP2015099941A (ja) | 2015-05-28 |
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