WO2014091644A1 - 多層配線基板およびその製造方法 - Google Patents
多層配線基板およびその製造方法 Download PDFInfo
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- WO2014091644A1 WO2014091644A1 PCT/JP2013/005365 JP2013005365W WO2014091644A1 WO 2014091644 A1 WO2014091644 A1 WO 2014091644A1 JP 2013005365 W JP2013005365 W JP 2013005365W WO 2014091644 A1 WO2014091644 A1 WO 2014091644A1
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- electronic component
- insulating layer
- multilayer wiring
- wiring board
- 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
- H05K1/0296—Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295
- H05K1/0298—Multilayer circuits
-
- 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
-
- 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
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/115—Via connections; Lands around holes or via connections
-
- 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]
-
- 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
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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
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/42—Plated through-holes or plated via connections
- H05K3/429—Plated through-holes specially for multilayer circuits, e.g. having connections to inner circuit layers
-
- 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
- H05K3/4647—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits by applying an insulating layer around previously made via studs
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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
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
- H05K3/4682—Manufacture of core-less build-up multilayer circuits on a temporary carrier or on a metal foil
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/04105—Bonding areas formed on an encapsulation of the semiconductor or solid-state body, e.g. bonding areas on chip-scale packages
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73267—Layer and HDI connectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/1515—Shape
- H01L2924/15153—Shape the die mounting substrate comprising a recess for hosting the device
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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
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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
- H05K2203/14—Related to the order of processing steps
- H05K2203/1461—Applying or finishing the circuit pattern after another process, e.g. after filling of vias with conductive paste, after making printed resistors
- H05K2203/1469—Circuit made after mounting or encapsulation of the components
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
- Y10T29/49131—Assembling to base an electrical component, e.g., capacitor, etc. by utilizing optical sighting device
Definitions
- the present invention relates to a multilayer wiring board configured by alternately laminating a plurality of insulating layers and a plurality of conductor layers, and a method of manufacturing the same.
- the present invention has been made in view of these problems, and it is an object of the present invention to improve the degree of freedom of design in a multilayer wiring board incorporating electronic components.
- the present invention made to achieve the above object is configured by alternately laminating a plurality of insulating layers and a plurality of conductor layers, and in the insulating layer to electrically connect the upper surface and the lower surface of the insulating layer. And a plurality of insulating layers in which via conductors having a diameter reduced from the upper surface side to the lower surface side are formed, and a plurality of conductor layers. And an electronic component embedded in the first stacked body, the first stacked body being stacked on the first stacked body, and having a shape that decreases in diameter from the upper surface side to the lower surface side. It is a multilayer wiring board characterized by having a second laminated body configured by laminating at least one insulating layer in which a via conductor is formed inside and at least one conductive layer.
- the electronic component is embedded in the first stacked body, and at least one insulating layer and at least one conductor layer are stacked on the first stacked body.
- the constructed second laminate is further stacked. That is, when the number of insulating layers constituting the second laminate is small, the electronic component is incorporated in a region close to the upper surface of the multilayer wiring board. In addition, when the number of insulating layers constituting the second laminate is large, the electronic component is incorporated in a region apart from the upper surface of the multilayer wiring board.
- the area in which the electronic component is embedded is not limited to the upper surface of the multilayer wiring board, so the degree of freedom in design can be improved.
- the metal layer in contact with the lower portion of the electronic component may be formed below the electronic component in the first stacked body.
- the heat generated by the electronic component is conducted to the metal layer and released to the outside of the electronic component, so the heat dissipation of the electronic component can be improved.
- a plurality of electronic components are embedded in the first stacked body, and the plurality of electronic components are different from each other on the plane perpendicular to the stacking direction of the first stacked body. It is also good.
- the positions of the plurality of electronic components embedded in the first stacked body are not limited to one specific place in a plane perpendicular to the stacking direction of the first stacked body. For this reason, when incorporating a plurality of electronic components in a multilayer wiring board, it is possible to improve the degree of freedom of the embedded position.
- the multilayer wiring board of the present invention among the plurality of electronic components embedded in the first stacked body, one electronic component is used as the first electronic component, and one electronic component other than the first electronic component is Among the plurality of insulating layers constituting the first laminate, the second electronic component constitutes the first laminate, using the insulating layer in which the first electronic component is not embedded as the non-embedded insulating layer. Among the plurality of insulating layers, the non-buried insulating layer may be embedded.
- wiring can be formed in a region facing the first electronic component along the stacking direction in the non-buried insulating layer, and therefore, wiring in the non-buried insulating layer Density can be improved.
- the via conductor connected to the electronic component in the upper part of the electronic component has a length along the stacking direction of the first laminate that is greater than the insulating layer through which the via conductor penetrates. It may be long.
- the insulating layer in which the upper part of the electronic component is embedded is used as the first insulating layer, and the insulating layer stacked on the first insulating layer is used as the second insulating layer
- the via conductor is connected to the electronic component through the second insulating layer and further through the first insulating layer. For this reason, after laminating the first insulating layer and further laminating the second insulating layer, a process of forming a via hole which penetrates the second insulating layer and further passes through the inside of the first insulating layer to reach the electronic component is used. Therefore, the via conductor may be formed.
- the glass fiber layer may be laminated in the first laminate, and the electronic component may be embedded through the glass fiber layer.
- the rigidity of the portion in which the electronic component is embedded that is, the first laminate
- the housing hole formed in the first laminate to accommodate the electronic component in the first laminate before embedding the electronic component in the first laminate has a lower surface from the upper surface side.
- the shape may be reduced in diameter toward the side of.
- the present invention made to achieve the above object is configured by alternately laminating a plurality of insulating layers and a plurality of conductor layers, and insulating to electrically connect the upper surface and the lower surface of the insulating layer.
- a method of manufacturing a multilayer wiring board including a via conductor formed in a layer comprising: a plurality of insulating layers in which via conductors having a diameter reduced from the upper surface side toward the lower surface are formed;
- the metal is embedded in a region where the electronic component is embedded in the first laminate.
- This manufacturing method is a method of manufacturing the multilayer wiring board of the present invention, and by executing the method, the same effects as those of the multilayer wiring board of the present invention can be obtained.
- the metal layer is formed at a depth of the accommodation hole in order to form an accommodation hole reaching the metal layer without penetrating the metal layer by irradiating the laser toward the metal layer in the first stacked body. It can be controlled with high accuracy according to the position.
- the electronic component is embedded in a state where the lower portion of the electronic component and the metal layer are in contact with each other. For this reason, the heat which an electronic component emits is conducted to a metal layer, is emitted to the exterior of an electronic component, and can improve the heat dissipation of an electronic component.
- the electronic component is housed in the housing hole after the housing hole is formed. Before removing, the metal layer may be removed.
- FIG. 7 is a first cross-sectional view showing the manufacturing process of the multilayer wiring board 1 of the first embodiment.
- FIG. 7 is a second cross-sectional view showing the manufacturing process of the multilayer wiring board 1 of the first embodiment.
- FIG. 7 is a third cross-sectional view showing the manufacturing process of the multilayer wiring board 1 of the first embodiment.
- FIG. 7 is a fourth cross-sectional view showing the manufacturing process of the multilayer wiring board 1 of the first embodiment.
- FIG. 14 is a fifth cross-sectional view showing the manufacturing process of the multilayer wiring board 1 of the first embodiment.
- FIG. 13 is a sixth cross-sectional view showing the manufacturing process of the multilayer wiring board 1 of the first embodiment.
- FIG. 7 is a seventh cross-sectional view showing the manufacturing process of the multilayer wiring board 1 of the first embodiment.
- FIG. 13 is an eighth cross-sectional view showing the manufacturing process of the multilayer wiring board 1 of the first embodiment.
- It is sectional drawing which shows schematic structure of the multilayer wiring board 1 of 2nd Embodiment. It is sectional drawing which shows schematic structure of the multilayer wiring board 1 of 3rd Embodiment. It is sectional drawing which shows schematic structure of the multilayer wiring board 1 of 4th Embodiment. It is sectional drawing which shows schematic structure of the multilayer wiring board 1 of 5th Embodiment. It is sectional drawing which shows schematic structure of the multilayer wiring board 1 of 6th Embodiment. It is sectional drawing which shows schematic structure of the multilayer wiring board of another embodiment.
- the multilayer wiring board 1 of the first embodiment to which the present invention is applied is, as shown in FIG. 1, conductor layers 11, 12, 13, 14, 15, 16, 17 of a plurality of layers (eight layers in the present embodiment). , 18 and insulating layers 21, 22, 23, 24, 25, 26, 27 having a number of layers smaller than the conductor layers 11 to 18 (7 layers in this embodiment) are alternately stacked along the stacking direction SD And be configured.
- conductors 31, 32, 33, 34, 35 which are formed to extend in the stacking direction SD, respectively, in the insulating layers 21, 22, 23, 24, 25, 26, 27 constituting the multilayer wiring board 1. 36, 37 are provided.
- the conductor layers 11, 12, 13, 14, 15, 16, 17 are electrically connected to the conductor layers 12, 13, 14, 15, 16, 17, 18, respectively.
- solder resist layer 41 is stacked to cover the insulating layer 21 on the opposite side to the insulating layer 22 with the insulating layer 21 interposed therebetween, and the insulating layer 27 on the opposite side to the insulating layer 26 with the insulating layer 27 interposed therebetween.
- the solder resist layer 42 is laminated so as to cover the In the solder resist layers 41 and 42, openings 410 and 420 are formed in the regions where the conductor layers 11 and 18 are disposed, respectively. Further, the Ni / Au layer 43 is stacked on the conductor layer 18 in the opening 420.
- a support substrate 60 is prepared.
- the support substrate 60 is, for example, a plate-like member obtained by impregnating glass fiber with epoxy resin, and has high rigidity.
- the multilayer wiring board 1 is manufactured by laminating the conductor layers 11 to 18 and the insulating layers 21 to 27 and the like on both surfaces of the support substrate 60.
- the lower surface side of the support substrate 60 is omitted for simplification of the illustration.
- the release sheet 61 is crimped to the support substrate 60 by vacuum heat press, for example.
- the release sheet 61 is laminated.
- the release sheet 61 is configured by laminating a metal layer 611 (copper in the present embodiment) and a metal layer 612 (copper in the present embodiment). Since metal plating (for example, Cr plating) is performed between the metal layer 611 and the metal layer 612, the metal layer 611 and the metal layer 612 are stacked in a mutually peelable state.
- a film-like resin material for example, an epoxy resin
- the resin material is cured by pressure heating under vacuum to cure the solder resist layer 41.
- the release sheet 61 is covered with the solder resist layer 41.
- a laser is irradiated to a predetermined position on the surface of the solder resist layer 41 for each of both surfaces of the support substrate 60 to form openings 410 in the solder resist layer 41. Furthermore, a process (desmear process) for removing the smear generated in the opening 410 by the formation of the opening 410 is performed. Thereafter, electroless plating is performed to form a thin electroless plating layer (copper in the present embodiment) on the solder resist layer 41. Then, a predetermined resist pattern corresponding to the wiring pattern of the conductor layer 11 is formed on the electroless plating layer. Further, electroplating is performed to form a plated layer (copper in the present embodiment) in a region not covered with the resist. Thereafter, the unnecessary electroless plated layer and the resist are removed by etching. Thus, the metal conductor 62 is formed in the opening 410, and the conductor layer 11 having a predetermined wiring pattern is formed.
- a film-like resin material for example, an epoxy resin
- the resin material is cured by pressure heating under vacuum to harden the insulating layer 21.
- a plurality of via holes are formed in the insulating layer 21 by irradiating a laser to a predetermined position on the surface of the insulating layer 21. Further, a process (desmear process) is performed to remove the smear generated in the via hole by the formation of the via hole. Thereafter, electroless plating is performed to form a thin electroless plating layer (copper in this embodiment) on the insulating layer 21. Then, a predetermined resist pattern corresponding to the wiring pattern of the conductor layer 12 is formed on the electroless plating layer. Further, electroplating is performed to form a plated layer (copper in the present embodiment) in a region not covered with the resist. Thereafter, the unnecessary electroless plated layer and the resist are removed by etching. Thus, the via conductor 31 is formed in the via hole, and the conductor layer 12 having a predetermined wiring pattern is formed.
- the conductor layer 12 and the via conductor 31 are formed on the insulating layer 21.
- the insulating layers 22, 23, 24 and 25 and the conductor layers 13, 14, 15 and 16 are formed on the insulating layer 21.
- Via conductors 32, 33, 34, 35 are formed.
- the conductor layer 13 is composed of a predetermined wiring pattern 131 and a depth control pattern 132. Furthermore, the conductor layers 14, 15, 16 are disposed so as not to be opposed to the depth control pattern 132 along the stacking direction SD.
- a laser is irradiated on the surface of the insulating layer 25 at a position opposed to the depth control pattern 132 along the stacking direction SD, thereby penetrating the insulating layer 25 and the insulating layer 24 as shown in FIG.
- a bottomed hole 63 reaching the upper surface of the depth control pattern 132 in the insulating layer 23 is formed. Since the bottomed holes 63 are formed by laser processing, the bottomed holes 63 have a shape that is reduced in diameter from the upper surface of the insulating layer 25 toward the depth control pattern 132.
- a predetermined resist pattern 64 covering the wiring pattern of the conductor layer 16 is formed, and etching is performed. Thereby, as shown in FIG. 5, the depth control pattern 132 is removed.
- the electronic component 51 is accommodated in the bottomed hole 63.
- the insulating layer 26 is formed on the insulating layer 25 by using the same process as the formation of the insulating layers 21, 22, 23, 24, 25.
- the upper surface of the insulating layer 25 and the conductor layer 16 are covered with the insulating layer 26, and the gap between the bottomed hole 63 and the electronic component 51 is filled with the insulating layer 26.
- the electronic component 51 is embedded in the bottomed hole 63.
- a plurality of via holes 65 are formed in the insulating layer 21 as shown in FIG. Then, a desmear process is performed to remove the smear generated in the via hole 65. Thereafter, electroless plating is performed to form a thin electroless plating layer (copper in this embodiment) on the insulating layer 26. Then, a predetermined resist pattern corresponding to the wiring pattern of the conductor layer 17 is formed on the electroless plating layer. Further, electroplating is performed to form a plated layer (copper in the present embodiment) in a region not covered with the resist. Thereafter, the unnecessary electroless plated layer and the resist are removed by etching. Thereby, as shown in FIG. 9, the via conductor 36 is formed in the via hole 65, and the conductor layer 17 having a predetermined wiring pattern is formed.
- the insulating layer 27, the conductor layer 18, and the via conductor 37 are formed on the insulating layer 26 by using the same steps as the formation of the insulating layer 21, the conductor layer 12, and the via conductor 31. Then, after applying a solder resist made of an organic resin material such as epoxy resin so as to cover the insulating layer 27 and the conductor layer 18, the solder resist is patterned. Thereby, the solder resist layer 42 having the opening 420 in the region where the conductor layer 18 is disposed is formed on the insulating layer 27. Furthermore, the Ni / Au layer 43 is formed on the conductor layer 18 by performing electroless plating.
- the laminate 2 in which the conductor layers 11 to 18 and the insulating layers 21 to 27 are stacked on the metal layer 612 is separated from the support substrate 60. Thereby, two laminated bodies 2 can be obtained.
- the metal layer 612 and the metal conductor 62 are removed by etching. Thereby, as shown in FIG. 1, the solder resist layer 41 having the opening 410 in the region where the conductor layer 11 is disposed is formed on the insulating layer 21, and the multilayer wiring board 1 can be obtained.
- the insulating layers 23, 24, 25 in which the via conductors 33, 34, 35, 36 having a shape reduced in diameter from the upper surface side toward the lower surface side are formed.
- the insulating layer 27 has a via conductor 37 having a diameter reduced from the side to the side of the lower surface.
- the electronic component 51 is incorporated in a region close to the upper surface of the multilayer wiring board 1. Further, when the number of insulating layers constituting the second stacked body is large, the electronic component 51 is incorporated in a region separated from the upper surface of the multilayer wiring board 1.
- the area in which the electronic component 51 is embedded is not limited to the upper surface of the multilayer wiring board 1, so the degree of freedom in design can be improved.
- the insulating layers 23, 24, 25, in which the via conductors 33, 34, 35, 36 having a shape reduced in diameter from the upper surface side toward the lower surface side are formed. 26 in the middle of the first stacked body in the middle of the first stacked body producing step of producing the first stacked body formed by stacking the conductive layer 13 and the conductor layers 13, 14, 15, 16 and the first stacked body producing step.
- the depth control is performed without penetrating the depth control pattern 132 by irradiating the laser toward the depth control pattern 132 in the first stacked body.
- the depth of the bottomed hole 63 can be accurately controlled according to the position where the depth control pattern 132 is formed.
- the bottomed hole 63 has a shape that is reduced in diameter from the upper surface side to the lower surface side. Thereby, the opening of the bottomed hole 63 becomes wider than the bottom of the bottomed hole 63, so the electronic component 51 can be easily accommodated in the accommodation hole from the opening side of the bottomed hole 63, and the electronic component 51 can be reliably Can be mounted in the multilayer wiring board 1.
- the depth control pattern 132 is the metal layer in the present invention
- the bottomed hole 63 is the accommodation hole in the present invention.
- the multilayer wiring board 1 of the second embodiment is, as shown in FIG. 10, a point that an electronic component 52 embedded in the multilayer wiring board 1 is added, and a point that depth control patterns 132 and 142 are added. Except for the above, this embodiment is the same as the second embodiment.
- the electronic component 51 is embedded in the insulating layers 23, 24, 25 and 26, whereas the electronic component 52 is embedded in the insulating layers 24, 25 and 26.
- the depth control pattern 132 is formed on the insulating layer 22.
- the bottomed holes 63 are bottomed holes that penetrate the insulating layer 25 and the insulating layer 24 and reach the top surface of the depth control pattern 132 in the insulating layer 23. For this reason, the electronic component 51 is embedded in the inside of the insulating layers 23, 24, 25 and 26 with the lower part in contact with the depth control pattern 132.
- the depth control pattern 142 is formed on the insulating layer 23.
- the bottomed hole 66 is a bottomed hole which penetrates the insulating layer 25 and reaches the upper surface of the depth control pattern 142 in the insulating layer 24. For this reason, the electronic component 52 is embedded in the inside of the insulating layers 24, 25 and 26 with the lower part in contact with the depth control pattern 142.
- the insulating layers 22, 23, 24, 25, the conductor layers 13, 14, 15, 16 and the via conductors 32, 33, 34, 35 are formed on the insulating layer 21.
- the conductor layer 13 is composed of a predetermined wiring pattern 131 and a depth control pattern 132.
- the conductor layer 14 is composed of a predetermined wiring pattern 141 and a depth control pattern 142.
- a laser is irradiated on the surface of the insulating layer 25 at a position facing the depth control patterns 132 and 142.
- a bottomed hole 63 penetrating the insulating layer 25 and the insulating layer 24 to reach the upper surface of the depth control pattern 132 in the insulating layer 23, and a depth in the insulating layer 24 penetrating the insulating layer 25.
- a bottomed hole 66 reaching the upper surface of the control pattern 142 is formed.
- the electronic component 51 is accommodated in the bottomed hole 63, and the electronic component 52 is accommodated in the bottomed hole 66.
- the insulating layer 26 is formed on the insulating layer 25.
- the electronic component 51 is embedded in the bottomed hole 63, and the electronic component 52 is embedded in the bottomed hole 66.
- depth control patterns 132 and 142 in contact with the lower portions of the electronic components 51 and 52 are formed below the electronic components 51 and 52.
- the heat generated by the electronic components 51 and 52 is conducted to the depth control patterns 132 and 142 and released to the outside of the electronic components 51 and 52, so that the heat dissipation of the electronic components 51 and 52 can be improved. it can.
- the multilayer wiring board 1 of the third embodiment is the same as that of the second embodiment except that the depth control patterns 132 and 142 are omitted as shown in FIG. That is, the electronic component 51 is embedded in the inside of the insulating layers 23, 24, 25, 26 with the lower part in contact with the insulating layer 22. The electronic component 52 is embedded in the inside of the insulating layers 24, 25, 26 in a state where the lower part is in contact with the insulating layer 23.
- the method of embedding the electronic components 51 and 52 is the second embodiment except that a step of removing the depth control patterns 132 and 142 by etching after forming the bottomed holes 63 and 65 by laser irradiation is added. It is the same as the form.
- the electronic components 51 and 52 are embedded in the multilayer wiring board 1, and the electronic components 51 and 52 are different in position on a plane perpendicular to the stacking direction SD.
- the positions of the electronic components 51 and 52 embedded in the multilayer wiring board 1 are not limited to one specific place in a plane perpendicular to the stacking direction SD. Therefore, when the electronic components 51 and 52 are embedded in the multilayer wiring board 1, the degree of freedom of the embedded position can be improved.
- the multilayer wiring board 1 of the fourth embodiment is the same as the third embodiment except that the electronic component 51 is embedded in the inside of the insulating layers 22, 23, 24, 25 as shown in FIG. Next, a method of embedding the electronic components 51 and 52 will be described.
- the conductor layer 12 is composed of a predetermined wiring pattern 121 and a depth control pattern 122. Furthermore, the conductor layer 14 is composed of a predetermined wiring pattern 141 and a depth control pattern 142.
- a predetermined resist pattern that covers the wiring pattern of the conductor layer 15 is formed, and etching is performed. Thereby, the depth control pattern 122 is removed. Thereafter, the electronic component 51 is accommodated in the bottomed hole 67. Then, the insulating layer 25 is formed on the insulating layer 24. As a result, the upper surface of the insulating layer 24 and the conductor layer 15 are covered with the insulating layer 25, and the insulating layer 25 is filled in the gap between the bottomed hole 67 and the electronic component 51. The electronic component 51 is embedded in the portion 67. Then, the via conductor 35 is formed in the insulating layer 25 and the conductor layer 16 is formed on the insulating layer 25.
- a predetermined resist pattern that covers the wiring pattern of the conductor layer 16 is formed, and etching is performed. Thereby, the depth control pattern 142 is removed. Thereafter, the electronic component 52 is accommodated in the bottomed hole 66. Then, the insulating layer 26 is formed on the insulating layer 25. As a result, the upper surface of the insulating layer 25 and the conductor layer 16 are covered with the insulating layer 26, and the insulating layer 26 is filled in the gap between the bottomed hole 66 and the electronic component 52. The electronic component 52 is embedded in the portion 66. The subsequent steps are the same as in the first embodiment.
- the electronic component 51 is embedded also in the insulating layers 22 and 23 in which the electronic component 52 is not embedded. For this reason, in the insulating layers 22 and 23 in which the electronic component 51 is embedded, wiring can be formed in a region facing the electronic component 52 along the stacking direction SD, so the insulation in which the electronic component 51 is embedded The wiring density in the layers 22 and 23 can be improved.
- via conductors 68 are used instead of via conductors 36 connecting the electronic components 51 and the conductor layer 17 with different heights of the electronic components 51. Except the point provided, it is the same as 1st Embodiment.
- the height of the electronic component 51 (the length along the stacking direction SD) is smaller than the height of the bottomed hole 63. For this reason, the electronic component 51 of the first embodiment is embedded in the inside of the insulating layers 23, 24, 25, 26, whereas the electronic component 51 of the fifth embodiment is of the insulating layers 23, 24, 25. It is embedded inside.
- the via conductor 68 electrically connects the electronic component 51 and the conductor layer 17, and the length along the stacking direction SD is longer than the insulating layer 26 through which the via conductor 68 penetrates. Therefore, after the insulating layer 25 is stacked and the insulating layer 26 is further stacked, a via is formed by passing through the insulating layer 26 and further passing through the insulating layer 25 to reach the electronic component 51.
- the conductor 68 may be formed. That is, in order to form the via conductor 68, it is not necessary to use the process of forming the via conductor 35 after laminating the insulating layer 25 and further forming the via conductor 36 after laminating the insulating layer 26. Therefore, the process of forming the via conductor 68 can be simplified.
- the multilayer wiring board 1 of the sixth embodiment is the same as that of the first embodiment except that a glass fiber layer 69 is included in the insulating layer 24 as shown in FIG. Therefore, the bottomed holes 63 and the via conductors 34 are formed through the glass fiber layer 69.
- the glass fiber layer 69 is stacked in the insulating layer 24, and the electronic component 51 is embedded through the glass fiber layer 69. Thereby, in the multilayer wiring board 1, the rigidity of the portion in which the electronic component 51 is embedded can be enhanced.
- the electronic component is embedded in the multilayer wiring board, but as shown in FIG. 15, the core substrate 102 supporting the multilayer wiring board 101 in which the electronic component 51 is embedded is provided. It is also possible for the electronic component 53 to be embedded further.
- SYMBOLS 1 Multilayer wiring board, 11, 12, 13, 14, 15, 16, 17, 18 ... Conductor layer, 21, 22, 23, 24, 25, 26, 27 ... Insulating layer, 31, 32, 33, 34, 35, 36, 37, 68 ... via conductors, 51, 52 ... electronic parts, 63, 66, 67 ... bottomed holes, 69 ... glass fiber layer, 132, 142 ... patterns for depth control
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Abstract
Description
また、本発明の多層配線基板において、第1積層体内において、電子部品の下部と接する金属層が電子部品の下方に形成されているようにしてもよい。
また、本発明の多層配線基板において、第1積層体内に複数の電子部品が埋め込まれ、複数の電子部品は互いに、第1積層体の積層方向に垂直な平面上での位置が異なるようにしてもよい。
また、第1積層体内の金属層に向けてレーザを照射することにより、金属層を貫通することなく金属層に到る収容孔を形成するため、収容孔の深さを、金属層を形成する位置に応じて精度よく制御することができる。
以下に本発明の第1実施形態を図面とともに説明する。
本発明が適用された第1実施形態の多層配線基板1は、図1に示すように、複数層(本実施形態では8層)の導体層11,12,13,14,15,16,17,18と、導体層11~18より1層少ない層数(本実施形態では7層)の絶縁層21,22,23,24,25,26,27とが積層方向SDに沿って交互に積層されて構成される。
次に、本発明が適用された多層配線基板1の製造方法を説明する。
そして、エポキシ樹脂等の有機樹脂材料で構成されたソルダーレジストを絶縁層27と導体層18を覆うように塗布した後に、このソルダーレジストをパターニングする。これにより、導体層18が配置されている領域に開口部420を有するソルダーレジスト層42が絶縁層27上に形成される。さらに、無電解メッキを行うことにより、導体層18上にNi/Au層43を形成する。
また、多層配線基板1の製造方法は、上面の側から下面の側に向うに従って縮径した形状を有するビア導体33,34,35,36が内部に形成された絶縁層23,24,25,26と、導体層13,14,15,16とを積層して構成された第1積層体を作製する第1積層体作製工程と、第1積層体作製工程の途中で、第1積層体内において電子部品51が埋め込まれる領域に深さ制御用パターン132を形成する深さ制御用パターン形成工程と、第1積層体の上面の側から、第1積層体内の深さ制御用パターン132に向けてレーザを照射することにより、積層方向SDに延びて深さ制御用パターン132を貫通することなく深さ制御用パターン132に到る有底孔63を形成する有底孔形成工程と、有底孔63内に電子部品51を収容する収容工程と、有底孔63内に電子部品51を収容した後に、第1積層体上に絶縁層26を積層する絶縁層積層工程とを有する。
(第2実施形態)
以下に本発明の第2実施形態を図面とともに説明する。なお第2実施形態では、第1実施形態と異なる部分を説明する。
深さ制御用パターン132は、絶縁層22上に形成されている。そして有底孔63は、絶縁層25と絶縁層24を貫通して絶縁層23内の深さ制御用パターン132の上面に到る有底孔である。このため電子部品51は、その下部が深さ制御用パターン132に接した状態で、絶縁層23,24,25,26の内部に埋め込まれている。
まず、第1実施形態で示したように、絶縁層21上に、絶縁層22,23,24,25と導体層13,14,15,16とビア導体32,33,34,35を形成する。なお、導体層13は、所定の配線パターン131と深さ制御用パターン132とから構成される。さらに、導体層14は、所定の配線パターン141と深さ制御用パターン142とから構成される。
以下に本発明の第3実施形態を図面とともに説明する。なお第3実施形態では、第2実施形態と異なる部分を説明する。
すなわち電子部品51は、その下部が絶縁層22に接した状態で、絶縁層23,24,25,26の内部に埋め込まれている。また電子部品52は、その下部が絶縁層23に接した状態で、絶縁層24,25,26の内部に埋め込まれている。
以下に本発明の第4実施形態を図面とともに説明する。なお第4実施形態では、第3実施形態と異なる部分を説明する。
次に、電子部品51,52を埋め込む方法を説明する。
その後、有底孔67内に電子部品51を収容する。そして、絶縁層24上に、絶縁層25を形成する。これにより、絶縁層24の上面と導体層15が絶縁層25に被覆されるとともに、有底孔67と電子部品51との間の隙間に絶縁層25が充填された状態になり、有底孔67内に電子部品51が埋め込まれる。そして、絶縁層25内にビア導体35を形成するとともに絶縁層25上に導体層16を形成する。
その後、有底孔66内に電子部品52を収容する。そして、絶縁層25上に、絶縁層26を形成する。これにより、絶縁層25の上面と導体層16が絶縁層26に被覆されるとともに、有底孔66と電子部品52との間の隙間に絶縁層26が充填された状態になり、有底孔66内に電子部品52が埋め込まれる。その後の工程は第1実施形態と同様である。
以下に本発明の第5実施形態を図面とともに説明する。なお第5実施形態では、第1実施形態と異なる部分を説明する。
このため、絶縁層25を積層し更に絶縁層26を積層した後に、絶縁層26を貫通し更に絶縁層25内を通過して電子部品51に到るビアホールを形成するという工程を用いることによりビア導体68を形成すればよい。すなわち、ビア導体68を形成するために、絶縁層25を積層した後にビア導体35を形成し、さらに、絶縁層26を積層した後にビア導体36を形成するという工程を用いる必要がない。このため、ビア導体68を形成する工程を簡略化することができる。
以下に本発明の第6実施形態を図面とともに説明する。なお第6実施形態では、第1実施形態と異なる部分を説明する。
したがって、有底孔63とビア導体34は、ガラス繊維層69を貫通して形成されている。
例えば上記実施形態では、多層配線基板内に電子部品が埋め込まれているものを示したが、図15に示すように、電子部品51が埋め込まれている多層配線基板101を支持するコア基板102内に電子部品53が更に埋め込まれるようにすることも可能である。
Claims (9)
- 複数の絶縁層と複数の導体層とを交互に積層して構成され、前記絶縁層の上面と下面とを電気的に接続するために前記絶縁層内に形成されるビア導体を備える多層配線基板であって、
前記上面の側から前記下面の側に向うに従って縮径した形状を有する前記ビア導体が内部に形成された複数の前記絶縁層と、複数の前記導体層とを積層して構成された第1積層体と、
前記第1積層体内に埋め込まれた電子部品と、
前記第1積層体上に積層され、前記上面の側から前記下面の側に向うに従って縮径した形状を有する前記ビア導体が内部に形成された少なくとも1層の前記絶縁層と、少なくとも1層の前記導体層とを積層して構成された第2積層体とを有する
ことを特徴とする多層配線基板。 - 前記第1積層体内において、前記電子部品の下部と接する金属層が前記電子部品の下方に形成されている
ことを特徴とする請求項1に記載の多層配線基板。 - 前記第1積層体内に複数の前記電子部品が埋め込まれ、
複数の前記電子部品は互いに、前記第1積層体の積層方向に垂直な平面上での位置が異なる
ことを特徴とする請求項1または請求項2に記載の多層配線基板。 - 前記第1積層体内に埋め込まれた複数の前記電子部品のうち、1つの前記電子部品を第1電子部品とし、前記第1電子部品とは別の1つの前記電子部品を第2電子部品とし、
前記第1積層体を構成する複数の前記絶縁層のうち、前記第1電子部品が埋め込まれていない前記絶縁層を非埋込絶縁層として、
前記第2電子部品は、前記第1積層体を構成する複数の前記絶縁層のうち、前記非埋込絶縁層内にも埋め込まれている
ことを特徴とする請求項3に記載の多層配線基板。 - 前記電子部品の上部で該電子部品と接続される前記ビア導体は、前記第1積層体の積層方向に沿った長さが、該ビア導体が貫通している前記絶縁層よりも長い
ことを特徴とする請求項1~請求項4の何れか1項に記載の多層配線基板。 - 前記第1積層体内にガラス繊維層が積層されており、
前記電子部品は、前記ガラス繊維層を貫通して埋め込まれている
ことを特徴とする請求項1~請求項5の何れか1項に記載の多層配線基板。 - 前記電子部品を前記第1積層体内に埋め込む前に前記第1積層体内に前記電子部品を収容するために前記第1積層体内に形成される収容孔は、前記上面の側から前記下面の側に向うに従って縮径した形状を有する
ことを特徴とする請求項1~請求項6の何れか1項に記載の多層配線基板。 - 複数の絶縁層と複数の導体層とを交互に積層して構成され、前記絶縁層の上面と下面とを電気的に接続するために前記絶縁層内に形成されるビア導体を備える多層配線基板の製造方法であって、
前記上面の側から前記下面の側に向うに従って縮径した形状を有する前記ビア導体が内部に形成された複数の前記絶縁層と、複数の前記導体層とを積層して構成された第1積層体を作製する第1積層体作製工程と、
前記第1積層体作製工程の途中で、前記第1積層体内において前記電子部品が埋め込まれる領域に金属層を形成する金属層形成工程と、
前記第1積層体の上面の側から、前記第1積層体内の前記金属層に向けてレーザを照射することにより、前記第1積層体の積層方向に延びて前記金属層を貫通することなく前記金属層に到る収容孔を形成する収容孔形成工程と、
前記収容孔内に電子部品を収容する収容工程と、
前記収容孔内に前記電子部品を収容した後に、前記第1積層体上に絶縁層を積層する絶縁層積層工程とを有する
ことを特徴とする多層配線基板の製造方法。 - 前記収容孔を形成した後であり且つ前記収容孔内に前記電子部品を収容する前に、前記金属層を除去する除去工程を有する
ことを特徴とする請求項8に記載の多層配線基板の製造方法。
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US14/651,384 US20150327362A1 (en) | 2012-12-12 | 2013-09-11 | Multilayer wiring substrate and production method therefor |
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EP13862412.7A EP2934075A1 (en) | 2012-12-12 | 2013-09-11 | Multilayer wiring substrate and production method therefor |
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2013
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- 2013-09-11 WO PCT/JP2013/005365 patent/WO2014091644A1/ja active Application Filing
- 2013-09-11 EP EP13862412.7A patent/EP2934075A1/en not_active Withdrawn
- 2013-09-11 US US14/651,384 patent/US20150327362A1/en not_active Abandoned
- 2013-09-11 CN CN201380065360.3A patent/CN104854969A/zh active Pending
- 2013-12-02 TW TW102143955A patent/TW201431455A/zh unknown
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KR102281458B1 (ko) * | 2014-06-23 | 2021-07-27 | 삼성전기주식회사 | 소자 내장형 인쇄회로기판, 반도체 패키지 및 그 제조방법 |
Also Published As
Publication number | Publication date |
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KR20150084979A (ko) | 2015-07-22 |
TW201431455A (zh) | 2014-08-01 |
EP2934075A1 (en) | 2015-10-21 |
US20150327362A1 (en) | 2015-11-12 |
JP2014116548A (ja) | 2014-06-26 |
CN104854969A (zh) | 2015-08-19 |
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