WO2005071742A1 - 積層型電子部品の製造方法 - Google Patents
積層型電子部品の製造方法 Download PDFInfo
- Publication number
- WO2005071742A1 WO2005071742A1 PCT/JP2004/018353 JP2004018353W WO2005071742A1 WO 2005071742 A1 WO2005071742 A1 WO 2005071742A1 JP 2004018353 W JP2004018353 W JP 2004018353W WO 2005071742 A1 WO2005071742 A1 WO 2005071742A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- main surface
- resin layer
- resin
- wiring conductor
- circuit element
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 229920005989 resin Polymers 0.000 claims abstract description 242
- 239000011347 resin Substances 0.000 claims abstract description 242
- 239000000758 substrate Substances 0.000 claims abstract description 106
- 239000004020 conductor Substances 0.000 claims abstract description 84
- 239000000919 ceramic Substances 0.000 claims abstract description 74
- 229920001187 thermosetting polymer Polymers 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000011800 void material Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 144
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 239000011889 copper foil Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 229910000679 solder Inorganic materials 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000011256 inorganic filler Substances 0.000 description 4
- 229910003475 inorganic filler Inorganic materials 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 244000062645 predators Species 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000010944 silver (metal) Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
- H05K1/185—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit
- H05K1/186—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit manufactured by mounting on or connecting to patterned circuits before or during embedding
- H05K1/187—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit manufactured by mounting on or connecting to patterned circuits before or during embedding the patterned circuits being prefabricated circuits, which are not yet attached to a permanent insulating substrate, e.g. on a temporary carrier
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
- H01L21/4814—Conductive parts
- H01L21/4846—Leads on or in insulating or insulated substrates, e.g. metallisation
- H01L21/4857—Multilayer substrates
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49822—Multilayer substrates
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- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/538—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates
- H01L23/5385—Assembly of a plurality of insulating substrates
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- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/538—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates
- H01L23/5389—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates the chips being integrally enclosed by the interconnect and support structures
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- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
- H01L25/162—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits the devices being mounted on two or more different substrates
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- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
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- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
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- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/16235—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation the bump connector connecting to a via metallisation of the item
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- H01L2924/01004—Beryllium [Be]
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- H01L2924/01078—Platinum [Pt]
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
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- H01L2924/01079—Gold [Au]
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/095—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00 with a principal constituent of the material being a combination of two or more materials provided in the groups H01L2924/013 - H01L2924/0715
- H01L2924/097—Glass-ceramics, e.g. devitrified glass
- H01L2924/09701—Low temperature co-fired ceramic [LTCC]
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- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/153—Connection portion
- H01L2924/1532—Connection portion the connection portion being formed on the die mounting surface of the substrate
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- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/161—Cap
- H01L2924/1615—Shape
- H01L2924/16152—Cap comprising a cavity for hosting the device, e.g. U-shaped cap
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- H01L2924/19—Details of hybrid assemblies other than the semiconductor or other solid state devices to be connected
- H01L2924/191—Disposition
- H01L2924/19101—Disposition of discrete passive components
- H01L2924/19105—Disposition of discrete passive components in a side-by-side arrangement on a common die mounting substrate
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/19—Details of hybrid assemblies other than the semiconductor or other solid state devices to be connected
- H01L2924/191—Disposition
- H01L2924/19101—Disposition of discrete passive components
- H01L2924/19106—Disposition of discrete passive components in a mirrored arrangement on two different side of a common die mounting substrate
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/35—Mechanical effects
- H01L2924/351—Thermal stress
- H01L2924/3511—Warping
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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
- H05K1/0306—Inorganic insulating substrates, e.g. ceramic, glass
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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
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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
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10227—Other objects, e.g. metallic pieces
- H05K2201/10378—Interposers
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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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/06—Lamination
- H05K2203/061—Lamination of previously made multilayered subassemblies
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
- H05K3/4614—Manufacturing multilayer circuits by laminating two or more circuit boards the electrical connections between the circuit boards being made during lamination
Definitions
- the present invention relates to a method for manufacturing a laminated electronic component in which a core substrate and a resin layer are pressure-bonded and laminated.
- Various high-frequency modules such as a chip antenna, a delay line, a high-frequency composite switch module, and a receiving device are mounted inside an information communication device such as a mobile phone.
- a high-frequency module is used in a state mounted on a mounting board such as a printed wiring board.
- a circuit element is generally mounted on a multilayer substrate.
- Patent Document 1 discloses a multilayer module in which circuit elements are mounted on a ceramic multilayer substrate in a state of being buried in a resin layer.
- thermosetting resin is in a semi-cured state (B-stage state or pre-predator state). Use the following method.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-188538
- the resin sheet does not lose its shape, such as via conductors, formed in the resin sheet even when it is heated and pressed with the ceramic multilayer substrate. Something with poor fluidity is used. For this reason, it was difficult to sufficiently spread the resin around the back side of the circuit element, and it was not possible to prevent the occurrence of cavities.
- the invention according to claim 1 provides a core substrate having one main surface and the other main surface, and having a first wiring conductor formed on the one main surface.
- a second wiring conductor comprising a thermosetting resin in a cured state or a semi-cured state, having one main surface and the other main surface, wherein a second wiring conductor is formed on the one main surface;
- the core substrate and the first resin layer are pressed against each other with the second main layer facing the first main surface of the resin layer.
- a circuit element is embedded in the first resin layer in advance, and the first resin layer is interposed between the second resin layers in a semi-cured state, which is an intermediate layer.
- the second resin layer is reliably inserted into the mounting surface of the circuit element, and the generation of cavities is prevented.
- a conductive portion is formed in the second resin layer over one main surface force and the other main surface, and the first wiring conductor of the core substrate and the second wiring conductor of the first resin layer are formed through the conductive portion. And electrically Connected.
- the circuit element is connected to the second wiring conductor. Therefore, the circuit element can be electrically connected to the first wiring conductor on the core substrate.
- the circuit element may be an active element such as a transistor, an IC, or an LSI, or a passive element such as a chip capacitor, a chip resistor, a chip thermistor, or a chip inductor.
- the first resin layer may be a cured resin substrate or a semi-cured resin sheet.
- the first resin layer may be laminated and pressure-bonded to the core substrate with the second resin layer interposed between the first resin layer and the first resin layer even if the first resin layer is press-bonded with a high pressure.
- the deformation of the oily layer is small and warpage can be prevented.
- the first resin layer and the second resin layer are strongly bonded, so that a strong resin layer is formed. There are advantages that can be.
- the step of preparing the first resin layer includes a support having one main surface and the other main surface, and a semi-cured state having the one main surface and the other main surface.
- the step of connecting circuit elements, the one main surface of the support and the one main surface of the resin sheet are opposed to each other, and the support and the resin sheet are pressure-bonded to form the resin sheet.
- a step of burying the circuit element in the resin a step of thermally curing a thermosetting resin contained in the resin sheet, and a step of peeling the resin sheet from the support to form the circuit element and the second element. Transferring a wiring conductor to the resin sheet.
- the circuit element is embedded in the first resin layer.
- the connection between the circuit element and the second wiring conductor is not disconnected when buried.
- the second resin layer has a smaller curing shrinkage in the main surface direction than the first resin layer.
- the second resin layer is cured after bonding with the core substrate.
- the resin shrinks when cured, whereas the core substrate does not shrink. This difference causes the multilayer electronic component to warp. Due to this warp, when this electronic component is mounted on a printed circuit board, the back electrode may not reach the electrodes on the printed circuit board, and conduction may not be established. Therefore, by reducing the shrinkage ratio of the second resin layer in the main surface direction, it is possible to suppress the occurrence of warpage and eliminate problems such as poor conduction.
- the curing shrinkage in the main surface direction can be reduced by making the thickness of the second resin layer smaller than that of the first resin layer.
- the cure shrinkage in the main surface direction means the ratio of the area after curing to the area before curing.
- the conductive portion may be formed of a via conductor formed by burying a conductive resin in a hole penetrating the second resin layer into one of the main surface forces and the other main surface.
- the conductive portion is made of conductive powder contained in the anisotropic conductive sheet. Is done.
- the first wiring conductor and the second wiring conductor provided at opposing positions can be reliably connected.
- the conductive portion is not limited to a via conductor or an anisotropic conductive sheet, but may be an external conductor provided along the outer surface of the resin layer.
- an external terminal electrode is formed on the other main surface of the first resin layer, and the external terminal electrode is electrically connected to the second wiring conductor via a via conductor. You may have it.
- the core substrate is a relatively low-strength substrate such as a low-temperature fired ceramic multilayer substrate
- the core substrate may be damaged by a drop impact, a thermal impact, or the like. Therefore, by providing external terminal electrodes on the first resin layer, that is, by providing the first resin layer on the mounting surface side of the core substrate, the first resin layer and the second resin layer become the core. It functions as a shock-absorbing layer of the substrate and can increase reliability.
- the core substrate is a ceramic multilayer substrate formed by laminating a plurality of ceramic layers with an internal conductor interposed therebetween, and the first wiring conductor is formed of the internal conductor via a via conductor. A structure that is electrically connected to at least one of them.
- the core substrate is not limited to a ceramic multilayer substrate, but may be a ceramic single-layer substrate, a resin multilayer substrate, or the like. Since a layer inductor and the like can be integrally formed, an electronic component suitable as a high-frequency module can be provided.
- a pad electrode is formed on the other main surface of the ceramic multilayer substrate, and the pad electrode is electrically connected to the internal conductor or the first wiring conductor via the via conductor.
- the method may further include a step of mounting a circuit element on the node electrode.
- a step of covering the case covering the circuit element mounted on the nod electrode with the ceramic multilayer substrate may be further provided.
- a step of molding a resin covering the circuit element mounted on the pad electrode on the other main surface of the ceramic multilayer substrate may be further provided.
- the mold resin can protect the circuit element, and can also be attracted by the mounter.
- a resin layer in which a circuit element is embedded via a resin layer in a semi-cured state may be laminated not only on one main surface side of the core substrate but also on the other main surface side.
- the resin is securely filled on the back side of the circuit element as in claim 1.
- the circuit element is embedded in the first resin layer in advance, and the first resin layer is a second layer in a semi-cured state, which is an intermediate layer. Since the resin layer is laminated and pressure-bonded to the core substrate, even if there is a gap on the back side of the circuit element, that is, on the side of the second wiring conductor, the second resin layer is pressure-bonded to this gap. Can be reliably filled with resin. Therefore, the generation of cavities can be prevented, and the circuit elements and the resin layer expand due to the heat during reflow. It is possible to eliminate the problem that occurs when the force in the direction in which the core substrate force is also applied or the short circuit between the electrodes of the circuit element due to the molten solder! Can be.
- FIG. 1 is a cross-sectional view of a first embodiment of a multilayer electronic component according to the present invention.
- FIG. 2 is a cross-sectional view of a multilayer electronic component according to a second preferred embodiment of the present invention.
- FIG. 3 is a cross-sectional view of a multilayer electronic component according to a third preferred embodiment of the present invention.
- FIG. 4 is a cross-sectional view of a multilayer electronic component according to a fourth preferred embodiment of the present invention.
- FIG. 5 is a cross-sectional view of a multilayer electronic component according to a fifth preferred embodiment of the present invention.
- FIG. 6 is a view showing a manufacturing process of a first resin layer in the multilayer electronic component.
- FIG. 7 is a view showing a manufacturing process of the multilayer electronic component.
- FIG. 1 shows a first embodiment of a multilayer electronic component according to the present invention.
- the multilayer electronic component A includes a ceramic multilayer substrate 1 composed of a plurality of ceramic layers, a resin layer (second resin layer) 10 fixed to the lower surface of the ceramic multilayer substrate 1, and a resin layer 10. It has a three-layer structure with a resin layer (first resin layer) 20 fixed to the lower surface of the substrate.
- the ceramic multilayer substrate 1 is, for example, a low-temperature fired ceramic multilayer substrate (LTCC), in which a plurality of ceramic layers are stacked via the internal electrode 2, and a via conductor 3 penetrating the ceramic layers in the thickness direction is provided. And are integrally fired.
- LTCC low-temperature fired ceramic multilayer substrate
- a multilayer capacitor, a multilayer inductor, and the like can be integrally formed.
- An element mounting pad electrode 4 is formed on the upper surface of the ceramic multilayer substrate 1, and a connection electrode 5 as a first wiring conductor is formed on the lower surface.
- the connection electrodes 5 are not limited to those individually formed on the lower surface of the ceramic multilayer substrate 1, and may be shared by the ends of the via conductors 3 exposed on the lower surface of the ceramic multilayer substrate 1.
- a circuit element 15 is mounted on the pad electrode 4 of the ceramic multilayer substrate 1.
- active elements such as ICs and LSIs and passive elements such as chip capacitors, chip resistors, chip thermistors, chip inductors, and filters can be used.
- Implementation method May be implemented by soldering or a conductive adhesive, or may be connected by using a bump, and may be connected by wire bonding.
- the resin layer 10 is a mixture of a thermosetting resin and an inorganic filler as appropriate, and functions as an adhesive layer for bonding the lower surface of the ceramic multilayer substrate 1 to the resin layer 20.
- a plurality of via conductors 11 penetrating in the thickness direction are formed in the resin layer 10. These via conductors 11 are connected to the connection electrodes 5 on the lower surface of the ceramic multilayer substrate 1 and the upper surface of a resin layer 20 described later. Are electrically connected to the electrodes 21 and 22 provided at the same time.
- the via conductor 11 of this embodiment is obtained by embedding a conductive resin in a through hole provided in the resin layer 10 and curing the resin.
- the resin layer 20 is a mixture of a thermosetting resin and an inorganic filler, and is fixed to the lower surface of the resin layer 10 so as to surround the circuit element 16.
- a nod electrode 21 as a second wiring conductor for connecting the circuit element 16 and a connection electrode 22 are formed on the upper surface of the resin layer 20 .
- a plurality of external terminal electrodes 23 are formed of copper foil. The reason why the external terminal electrode 23 is made of copper foil instead of a thick film electrode is that it is on the resin layer 20 side and cannot be formed by firing the conductive paste, and the copper foil and the resin are printed wiring. This is because, by applying the plate manufacturing method, it is possible to firmly bond together.
- the via conductor 24 is also formed by embedding a conductive resin in the through hole and curing the same as the via conductor 11.
- the via conductor 24 may be provided between the external terminal electrode 23 and the pad electrode 21.
- the external terminal electrodes 23 are provided on the lower surface of the resin layer 20.
- the present laminated electronic component can be connected to a printed circuit board or the like.
- the resin layer 20 can function as a shock absorbing layer for protecting the ceramic multilayer substrate 1 against a drop impact or a thermal shock.
- the resin layer 20 and the ceramic multilayer substrate 1 are laminated and pressure-bonded with the resin layer 10 in a semi-cured state interposed therebetween. Therefore, the resin layer 10 is filled on the back side of the circuit element 16 buried in the resin layer 20, that is, the side facing the resin layer 10, and no cavity is generated. Therefore, this electronic component must be When reflow mounting, the circuit element 16 and the resin layer 20 that prevent the cavity from expanding due to heat during reflow can be prevented from peeling from the ceramic multilayer substrate 1, and the electrodes of the circuit element 16 are melted. Problems such as short-circuiting with solder can also be solved.
- FIG. 2 shows a second embodiment of the multilayer electronic component.
- a case 30 that covers the circuit element 15 is placed on the surface of the ceramic multilayer substrate 1.
- a resin case or a metal case can be used.
- nickel, phosphor bronze, or the like is preferable in terms of processing efficiency and cost.
- FIG. 3 shows a third embodiment of the multilayer electronic component.
- resin 31 is molded on the surface of ceramic multilayer substrate 1 to cover circuit element 15.
- the resin 31 When the resin 31 is molded on the surface of the ceramic multilayer substrate 1, if the thermal expansion coefficients of the resin layer 31 on the front side and the resin layers 10 and 20 on the back side of the ceramic multilayer substrate 1 are different, the ceramics may not be formed due to the thermal history. Since the multilayer substrate 1 may be warped or cracked, the resin layers 10, 20, and 31 may have the same composition or may have a similar thermal expansion coefficient and use a material.
- FIG. 4 shows a fourth embodiment of the multilayer electronic component.
- the circuit element 15 shown in FIG. 1 is not directly connected to the upper surface of the ceramic multilayer substrate 1 but a resin layer 50 serving as an outer layer is fixed via a resin layer 40 serving as an intermediate layer. In addition, the circuit element 15 is embedded in the resin layer 50.
- the resin layer 40 is an intermediate layer that functions as an adhesive layer similar to the resin layer 10, and the resin layer 50 has substantially the same configuration as the resin layer 20. That is, a plurality of via conductors 41 penetrating in the thickness direction are formed in the resin layer 40, and the electrode 4 on the upper surface of the ceramic multilayer substrate 1 and the pad electrode 51 provided on the lower surface of the resin layer 50 are electrically connected. Connect to The circuit element 15 is connected to the nod electrode 51 and is embedded in the resin layer 50. Note that, unlike the resin layer 20, the resin layer 50 has no external terminal electrodes or via conductors.
- the resin layer 50 and the ceramic multilayer substrate 1 are sandwiched between the resin layers 40 in the semi-cured state.
- the resin layer 40 is surely filled on the back side of the circuit element 15 embedded in the resin layer 50, and no cavity is generated.
- FIG. 5 shows a fifth embodiment of the multilayer electronic component.
- the resin layer 10 having the via conductors 11 is used as the second resin layer.
- the same effect can be obtained by using the anisotropic conductive resin sheet 12.
- the resin layer 20 and the ceramic multilayer substrate 1 are laminated and pressure-bonded with the semi-cured anisotropic conductive resin sheet 12 therebetween, so that the ceramic multilayer facing in the thickness direction is pressed.
- the connection electrode 5 of the substrate 1 and the electrodes 21 and 22 of the resin layer 20 can be electrically connected.
- the anisotropic conductive resin sheet 12 since a part of the anisotropic conductive resin sheet 12 is filled on the back side of the circuit element 16, the generation of a cavity can be prevented.
- the ceramic multilayer substrate 1 and the resin layer 20 are accurately aligned, precise positioning is not required at the position of the anisotropic conductive resin sheet 12, so that There is an advantage that the lamination process can be simplified.
- the anisotropic conductive resin sheet 12 can be used in a softer state than a semi-cured state, that is, in an uncured state, and the filling property of the back side of the circuit element 16 is improved.
- a semi-cured resin sheet 20A, a support 25, and a support 26 are prepared.
- the resin sheet 20A is a mixture of a thermosetting resin (epoxy, phenol, cyanate, etc.) and an inorganic filler (Al 2 O 3, SiO 2, TiO 2, etc.), which is guided by a laser or the like.
- a thermosetting resin epoxy, phenol, cyanate, etc.
- an inorganic filler Al 2 O 3, SiO 2, TiO 2, etc.
- the semi-cured state refers to the B-stage state or pre-predator state.
- the via hole 24 is filled with a conductive resin (a mixture of metal particles such as Au, Ag, Cu, and Ni and a thermosetting resin such as epoxy, phenol, and cyanate).
- a conductive resin a mixture of metal particles such as Au, Ag, Cu, and Ni and a thermosetting resin such as epoxy, phenol, and cyanate.
- solder may be filled by reflow or the like after pressure bonding with the ceramic multilayer substrate 1.
- the thickness of the resin sheet 20A is Although it depends on the height, it is better to be 400 m thick. In this case, the ratio of the thickness of the ceramic to the thickness of the resin is about 10: 4.
- a copper foil having a thickness of about 10 to 40 m is plated or affixed on the upper surface of the support 25, and the copper foil is patterned through the steps of photolithography, exposure, development etching, and resist peeling. These become the second wiring conductors 21 and 22. Then, the circuit element 16 is mounted on the pad electrode 21.
- the external terminal electrode 23 is formed by similarly plating or affixing a copper foil on the lower surface of the support 26, and performing the steps of photoresist coating, exposure, development etching, and resist peeling, and patterning the copper foil. Form.
- the support 26 and the support 25 prepared as described above are positioned with the resin sheet 20 interposed therebetween, and are heated and pressed.
- the resin sheet 20A in a semi-cured state is pressed on the upper surface of the support 25 by heat compression, and at the same time, the periphery of the circuit element 16 is filled. However, the gap between the circuit element 16 and the support 25 may not be completely filled.
- the via conductor 24 provided on the resin sheet 20A is electrically connected to the electrode 22 on the support 25 and the electrode 23 on the support 26 by the heat compression.
- the resin sheet 20A is cured by heating while the supports 25 and 26 are pressed. After that, when the supports 25 and 26 are peeled off from the resin sheet 20A, the electrodes 21, 22 and 23 attached to the supports 25 and 26 are transferred to the resin sheet 20A, and as shown in FIG.
- the resin layer 20 becomes as shown. At this time, on the pad electrode 21 side of the circuit element 16, a concave portion 20 a not filled with resin may be formed.
- the ceramic multilayer substrate 1 is prepared.
- the ceramic multilayer substrate 1 is manufactured as follows.
- a ceramic slurry is applied on a resin film such as PET and dried to obtain a ceramic green sheet with a thickness of about 10 to 200 m.
- a ceramic powder contained in the ceramic slurry for example, a mixture of BaO, SiO 2, A 1 O, B O, CaO, etc. can be used.
- the same conductive paste as described above is printed in a desired pattern on the green sheet by screen printing or the like, and dried. This is the internal electrode 2.
- element mounting pad electrodes 4 and connection electrodes 5 are formed using the same conductive paste as described above.
- the conductive paste is Ag-based, it is around 850 ° C in air.
- the thickness of the laminate is, for example, about lmm. After baking, a film of NiZSn or NiZAu is formed on the electrodes exposed on the front and back surfaces as required.
- the ceramic multilayer substrate 1 is manufactured as described above.
- a semi-cured resin layer 10 serving as an intermediate layer is prepared.
- the semi-cured state refers to a B-stage state or a pre-predator state.
- the resin layer 10 is formed in a semi-cured resin sheet 10 by opening a conductive via hole 11 with a laser or the like, and a conductive resin (metal particles such as Au, Ag, Cu, Ni and epoxy, (A mixture of thermosetting resins such as phenol and cyanate).
- the resin sheet 10 is made of a thermosetting resin (epoxy, phenol, cyanate, etc.) mixed with an inorganic filler (Al 2 O 3, SiO 2, TiO 2, etc.).
- the thickness of the resin sheet 10 may be, for example, about 100 ⁇ m to 200 ⁇ m.
- the cured resin layer (resin plate) 20 is turned over so that the pad electrode 21 is exposed on the upper surface, and the semi-cured resin layer 10 is interposed on the resin layer 20. Then, the ceramic multilayer substrate 1 is positioned and press-bonded by heating (see (a) of FIG. 7).
- the resin layer 10 in the semi-cured state is pressed on the lower surface of the ceramic multilayer substrate 1 and also on the upper surface of the resin layer 20 by heating and pressing.
- the concave portion 20a existing between the circuit element 16 and the pad electrode 21 is also filled with the resin 10, thereby preventing the formation of a cavity.
- the resin layer 10 is cured by heating in the pressure-bonded state.
- the resin layer 20 and the ceramic At the same time as the layer substrate 1 is fixed via the resin layer 10, the electrode 5 on the lower surface of the ceramic multilayer substrate 1 and the resin layer 20 are connected via the via conductor 11 formed on the resin layer 10.
- the upper electrodes 21 and 22 are electrically connected (see FIG. 7B).
- circuit element 15 is mounted on the pad electrode 4 on the upper surface of the ceramic multilayer substrate 1, and the multilayer electronic component A shown in FIG. 7 (c) is completed.
- FIGS. 6 and 7 a method for manufacturing a single multilayer electronic component A has been described.
- the ceramic multilayer substrate 1, the resin layer 10, and the resin layer 20 are kept in a parent substrate state. Lamination ⁇ Crimped, then cut into pieces, may break!
- the cured resin layer 20 is pressed against the ceramic multilayer substrate 1 with the semi-cured resin layer 10 interposed therebetween. It may be pressed against the ceramic multilayer substrate 1 with the cured resin layer 10 in between!
- the external terminal electrode 23 is provided on the outer surface of the resin layer 20
- the external terminal electrode may be provided on the outer surface of the ceramic multilayer substrate 1.
- the ceramic multilayer substrate 1 is made of LTCC
- the strength is lower than that of the high temperature fired ceramic multilayer substrate (HTCC)
- the resin layer 20 should be on the mounting surface side, that is, the external terminal electrodes 23 should be resin. It is more desirable to provide a layer of 20 mm in terms of reliability.
- the ceramic multilayer substrate 1 is used as the core substrate
- a resin multilayer substrate may be used, or a ceramic single-layer substrate may be used.
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Description
Claims
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Cited By (4)
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WO2012107231A1 (de) * | 2011-02-09 | 2012-08-16 | Robert Bosch Gmbh | Vergossenes bauteil |
JPWO2016052284A1 (ja) * | 2014-09-30 | 2017-06-22 | 株式会社村田製作所 | 多層基板 |
US11201633B2 (en) | 2017-03-14 | 2021-12-14 | Murata Manufacturing Co., Ltd. | Radio frequency module |
US12040755B2 (en) | 2017-03-15 | 2024-07-16 | Murata Manufacturing Co., Ltd. | High-frequency module and communication device |
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JPH06152140A (ja) * | 1992-11-11 | 1994-05-31 | Hitachi Chem Co Ltd | 多層配線板の製造法 |
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WO2012107231A1 (de) * | 2011-02-09 | 2012-08-16 | Robert Bosch Gmbh | Vergossenes bauteil |
JPWO2016052284A1 (ja) * | 2014-09-30 | 2017-06-22 | 株式会社村田製作所 | 多層基板 |
US11201633B2 (en) | 2017-03-14 | 2021-12-14 | Murata Manufacturing Co., Ltd. | Radio frequency module |
US12040755B2 (en) | 2017-03-15 | 2024-07-16 | Murata Manufacturing Co., Ltd. | High-frequency module and communication device |
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