WO2007114111A1 - 多層配線基板とその製造方法 - Google Patents
多層配線基板とその製造方法 Download PDFInfo
- Publication number
- WO2007114111A1 WO2007114111A1 PCT/JP2007/056290 JP2007056290W WO2007114111A1 WO 2007114111 A1 WO2007114111 A1 WO 2007114111A1 JP 2007056290 W JP2007056290 W JP 2007056290W WO 2007114111 A1 WO2007114111 A1 WO 2007114111A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wiring board
- conductor
- electrically insulating
- multilayer wiring
- double
- Prior art date
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Classifications
-
- 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
- H05K3/462—Manufacturing multilayer circuits by laminating two or more circuit boards the electrical connections between the circuit boards being made during lamination characterized by laminating only or mainly similar double-sided circuit boards
-
- 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
- H05K1/0271—Arrangements for reducing stress or warp in rigid printed circuit boards, e.g. caused by loads, vibrations or differences in thermal expansion
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0335—Layered conductors or foils
- H05K2201/0355—Metal foils
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
- H05K2201/09781—Dummy conductors, i.e. not used for normal transport of current; Dummy electrodes of 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
- 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
-
- 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
- H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
- H05K2201/2072—Anchoring, i.e. one structure gripping into another
-
- 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
- H05K2203/063—Lamination of preperforated insulating 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/11—Treatments characterised by their effect, e.g. heating, cooling, roughening
- H05K2203/1189—Pressing leads, bumps or a die through an insulating 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
- 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
-
- 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
- H05K3/4038—Through-connections; Vertical interconnect access [VIA] connections
- H05K3/4053—Through-connections; Vertical interconnect access [VIA] connections by thick-film techniques
- H05K3/4069—Through-connections; Vertical interconnect access [VIA] connections by thick-film techniques for via connections in organic insulating substrates
-
- 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
- H05K3/4652—Adding a circuit layer by laminating a metal foil or a preformed metal foil pattern
-
- 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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1056—Perforating lamina
Definitions
- the present invention relates to a multilayer wiring board in which a plurality of layers of wiring are electrically connected by inner via hole connection and a method for manufacturing the same.
- the mainstream of interlayer connection of multilayer wiring boards has been metal-plated conductors formed on the inner wall of the through hole.
- An inner via hole connection method that allows interlayer connection across the wiring pattern position is attracting attention.
- An all-layer IVH structure resin multilayer substrate is manufactured by the inner via hole connection method.
- the via hole of the multilayer wiring board can be filled with a conductor to connect only the necessary layers, so that an inner via hole can be provided directly under the component land, thereby reducing the size and height of the board. Density mounting can be realized.
- FIG. 10A what is shown in FIG. 10A is an electrically insulating substrate 21, and protective films 22 are laminated on both sides of the electrically insulating substrate 21.
- a through hole 23 penetrating all of the electrically insulating substrate 21 and the protective film 22 is formed by laser processing or the like.
- the through hole 23 is filled with a conductor 29.
- the protective films 22 on both sides are peeled off.
- the state shown in FIG. 10D is obtained.
- the steps shown in Figure 10E The wire material 25 is bonded to the electrically insulating substrate 21 by heating and pressing. In this heating and pressing step, the conductor 29 electrically connects the wiring material 25 on the front and back surfaces.
- an electrically insulating base material filled with a conductor 24, manufactured in the same steps as shown in FIGS. 10A to 10D. 27 and wiring material 28 are laminated.
- the vertical force is further sandwiched between the press plates 31, and the wiring material 28 is adhered to the electrically insulating substrate 27 by heating and pressing.
- the double-sided wiring board 26 and the electrically insulating base material 27 are also bonded together.
- the conductor 24 electrically connects the wiring material 28 and the wiring 30 on the double-sided wiring board 26 as in the heating and pressing step shown in FIG. 10E.
- the number of layers of the multilayer wiring board is not limited to four, and the number of layers can be further increased by the same steps.
- the double-sided wiring board 26 and the press plate 31 have different dimensional variation behaviors during heating and pressing due to different materials.
- FIG. 10H shows an example in which the thermal expansion of the double-sided wiring board 26 is larger than that of the press plate 31, and the conductor 24 is deformed outward on the double-sided wiring board 26 side.
- the thermal expansion of the double-sided wiring board 26 is smaller than that of the press plate 31, the conductor 24 is It will be deformed inward on the double-sided wiring board 26 side.
- This misalignment distorts the coordinate position of the conductor 24 formed at a desired location on the electrical insulating base material 27, so that the diameter of the wiring pattern (ie, via land) that matches this conductor is It was necessary to design large enough to allow the deviation. As a result, there has been a problem that densification of the wiring board is hindered.
- the conductor is deformed in the shearing direction, so that the compressive force to be applied in the thickness direction of the conductor is relieved in the heating and pressing step.
- strong contact between the wiring material and the conductor could not be made, and there was a problem if the electrical connectivity between the conductor and the wiring material was deteriorated.
- Patent Document 1 is known as prior art document information related to the invention of this application.
- Patent Document 1 Japanese Patent Laid-Open No. 2005-150447
- An object of the present invention is to provide a high-density multilayer wiring board in which electrical connectivity between wiring layers in a conductor is ensured, and a method for manufacturing the same.
- the multilayer wiring board of the present invention penetrates through the first and second wirings provided on both sides of the electrically insulating substrate and the electrically insulating substrate.
- One embodiment of the present invention includes a first electrically insulating substrate having a first wiring on the surface, a second electrically insulating substrate for interlayer adhesion, and a second surface on the outermost layer surface.
- This wiring is a multilayer wiring board that is laminated by heating and pressing.
- the first wiring and the second wiring are electrically connected by a plurality of conductors penetrating the second electrically insulating base material and penetrated to the second electrically insulating base material.
- the plurality of conductors arranged in this manner is a multilayer wiring board including a throwing conductor. Due to the presence of the throwing conductor, the second electrically insulating substrate can change its dimensions following the first electrically insulating substrate when heated and pressurized.
- produces in the shear direction within a 2nd electrically insulating base material can be suppressed.
- the conductor formed on the electrically insulating substrate does not deform in the shear direction, distortion of the coordinate position of the conductor can be suppressed.
- the wiring pattern (via land) that matches the conductor can be suppressed. Therefore, it is possible to provide a high-density multilayer wiring board.
- Another embodiment of the present invention includes a through-hole forming step of forming a through-hole in an electrically insulating substrate, a filling step of filling the through-hole with a conductor, an electrically insulating substrate, A method for manufacturing a multilayer wiring board, comprising: a laminating step for forming a laminated structure including a double-sided wiring board; and a heating and pressing step for heating and pressurizing the laminated structure.
- the through-hole formed in the through-hole forming step includes a throwing through hole for forming a throwing conductor.
- the electrical insulating base material changes its dimensions following the double-sided wiring board during heating and pressurization, thereby suppressing distortion occurring in the shearing direction in the electrical insulating base material.
- the deformation of the conductor it is possible to ensure a strong contact between the conductor and the wiring material, and as a result, it is possible to provide a multilayer wiring board having excellent electrical connectivity.
- the electrically insulating substrate is heated and pressed with both surfaces sandwiched between the same kind of materials, the electrically insulating substrate is less likely to be distorted in the shear direction. It is possible to realize electrical connectivity with such a conductor.
- One embodiment of the present invention is a laminated structure in which a conductor forming step for forming a conductor on a wiring material, at least a wiring material, an electrically insulating substrate, and a double-sided wiring board are stacked. And a heating and pressing step for heating and pressurizing the laminated structure, and the conductor formed in the conductor forming step includes a throwing conductor. It is a manufacturing method. Due to the presence of the throwing conductor, the electrically insulating base material changes its dimensions following the double-sided wiring board when heated and pressurized, thereby suppressing distortion occurring in the shear direction in the electrically insulating base material. As a result, the deformation of the conductor is suppressed, and a strong contact between the conductor and the wiring material can be secured. A multilayer wiring board having excellent air connectivity can be provided.
- FIG. 1 is a cross-sectional view showing a structure of a multilayer wiring board according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view showing the structure of an electrically insulating substrate in the multilayer wiring board of the present invention.
- FIG. 3 is a partial cross-sectional view showing the surface structure of the multilayer wiring board in the first embodiment of the present invention.
- FIG. 4 is an external view showing a product portion of the multilayer wiring board in accordance with the first exemplary embodiment of the present invention.
- FIG. 5A is a step sectional view showing the method for manufacturing the multilayer wiring board according to the second embodiment of the present invention for each main step.
- FIG. 5B is a step sectional view showing the method for manufacturing the multilayer wiring board according to the second embodiment of the present invention for each main step.
- FIG. 5C is a step sectional view showing the method for manufacturing the multilayer wiring board described in the second embodiment of the present invention for each main step.
- FIG. 5D is a step sectional view showing the method of manufacturing the multilayer wiring board described in Embodiment 2 of the present invention for each main step.
- FIG. 5E is a step sectional view showing the method for manufacturing the multilayer wiring board described in the second embodiment of the present invention for each main step.
- FIG. 5F is a step sectional view showing the method for manufacturing the multilayer wiring board described in the second embodiment of the present invention for each main step.
- FIG. 5G is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 2 of the present invention for each main step.
- FIG. 5H is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 2 of the present invention for each main step.
- FIG. 51 is a step cross-sectional view showing the manufacturing method of the multilayer wiring board described in the second embodiment of the present invention for each main step.
- FIG. 6A is a step sectional view showing the method for manufacturing the multilayer wiring board according to the third embodiment of the present invention for each main step.
- FIG. 6B is a step sectional view showing the method for manufacturing the multilayer wiring board described in the third embodiment of the present invention for each main step.
- FIG. 6C is a step sectional view showing the method for manufacturing the multilayer wiring board according to the third embodiment of the present invention for each main step.
- FIG. 6D is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 3 of the present invention for each main step.
- FIG. 6E is a step sectional view showing the method for manufacturing the multilayer wiring board according to the third embodiment of the present invention for each main step.
- FIG. 6F is a step sectional view showing the method for manufacturing the multilayer wiring board described in the third embodiment of the present invention for each main step.
- FIG. 6G is a step sectional view showing the method for manufacturing the multilayer wiring board described in the third embodiment of the present invention for each main step.
- FIG. 7A is a step sectional view showing the method for manufacturing the multilayer wiring board described in the fourth embodiment of the present invention for each main step.
- FIG. 7B is a step sectional view showing the method for manufacturing the multilayer wiring board according to the fourth embodiment of the present invention for each main step.
- FIG. 7C is a step sectional view showing the method for manufacturing the multilayer wiring board according to the fourth embodiment of the present invention for each main step.
- FIG. 7D is a step sectional view showing the method of manufacturing the multilayer wiring board described in Embodiment 4 of the present invention for each main step.
- FIG. 7E is a step sectional view showing the method for manufacturing the multilayer wiring board according to the fourth embodiment of the present invention for each main step.
- FIG. 7F is a step sectional view showing the method for manufacturing the multilayer wiring board described in the fourth embodiment of the present invention for each main step.
- FIG. 7G is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 4 of the present invention for each main step.
- FIG. 8A is a step sectional view showing the method for manufacturing the multilayer wiring board according to the fifth embodiment of the present invention for each main step.
- FIG. 8B is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 5 of the present invention for each main step.
- FIG. 8C is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 5 of the present invention for each main step.
- FIG. 8D is a step sectional view showing the method of manufacturing the multilayer wiring board described in Embodiment 5 of the present invention for each main step.
- FIG. 8E is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 5 of the present invention for each main step.
- FIG. 8F is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 5 of the present invention for each main step.
- FIG. 8G is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 5 of the present invention for each main step.
- FIG. 8H is a step sectional view showing the method of manufacturing the multilayer wiring board described in Embodiment 5 of the present invention for each main step.
- FIG. 81 is a step sectional view showing the method of manufacturing the multilayer wiring board described in Embodiment 5 of the present invention for each main step.
- FIG. 9A is a step sectional view showing the method for manufacturing the multilayer wiring board according to the sixth embodiment of the present invention for each main step.
- FIG. 9B is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 6 of the present invention for each main step.
- FIG. 9C is a step cross-sectional view showing the method of manufacturing the multilayer wiring board according to Embodiment 6 of the present invention for each main step.
- FIG. 9D is a step sectional view showing the method of manufacturing the multilayer wiring board described in Embodiment 6 of the present invention for each main step.
- FIG. 9E is a step sectional view showing the method of manufacturing the multilayer wiring board described in Embodiment 6 of the present invention for each main step.
- FIG. 9F is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 6 of the present invention for each main step.
- FIG. 9G is a step sectional view showing the method of manufacturing the multilayer wiring board described in Embodiment 6 of the present invention for each main step.
- FIG. 9H is a step sectional view showing the method of manufacturing the multilayer wiring board described in Embodiment 6 of the present invention for each main step.
- FIG. 91 is a step sectional view showing the method for manufacturing the multilayer wiring board described in Embodiment 6 of the present invention for each main step.
- FIG. 10A is a step cross-sectional view showing a conventional method of manufacturing a multilayer wiring board for each main step.
- FIG. 10B is a step cross-sectional view showing a conventional multilayer wiring board manufacturing method for each main step.
- FIG. 10C is a step cross-sectional view showing a conventional method of manufacturing a multilayer wiring board for each main step.
- FIG. 10D is a step cross-sectional view showing a conventional method of manufacturing a multilayer wiring board for each main step.
- FIG. 10E is a cross-sectional view showing a conventional multilayer wiring board manufacturing method for each main step.
- FIG. 10F is a cross-sectional view showing a conventional multilayer wiring board manufacturing method for each main step.
- FIG. 10G is a step cross-sectional view showing a conventional multilayer wiring board manufacturing method for each main step.
- FIG. 10H is a step cross-sectional view showing a conventional multilayer wiring board manufacturing method for each main step.
- FIG. 101 is a step cross-sectional view showing a method for manufacturing a conventional multilayer wiring board for each main step.
- One embodiment of the present invention includes a first electrically insulating substrate having a first wiring on the surface, a second electrically insulating substrate for interlayer adhesion, and a second wiring on the outermost layer surface.
- a multilayer wiring board that is laminated by heating and pressing.
- the first wiring and the second wiring are electrically connected by a plurality of conductors arranged so as to penetrate through the second electrically insulating substrate, and penetrate through the second electrically insulating substrate.
- the plurality of conductors arranged in this manner is a multilayer wiring board including a throwing conductor. Due to the presence of the conductor for throwing, the second electrically insulating substrate can be heated and pressurized, and can follow the first electrically insulating substrate to change its dimensions.
- the strain generated in the shear direction in the conductive substrate can be suppressed.
- it is possible to suppress the deformation of the conductor ensure a strong contact between the conductor and the wiring material, and provide a multilayer wiring board with excellent electrical connectivity. can do.
- the conductor formed on the electrically insulating substrate does not deform in the shear direction, distortion of the coordinate position of the conductor can be suppressed, and as a result, the wiring pattern that matches the conductor (that is, via land) ) Can be designed to be small, and a high-density multilayer wiring board can be provided.
- the strain generated in the shear direction is a strain in a direction substantially parallel to the surface of the substrate, and refers to a strain in a direction in which the columnar conductor is inclined.
- One embodiment of the present invention is a multilayer wiring board characterized in that the diameter of the throwing conductor is different from the diameter of the other plurality of conductors arranged.
- One embodiment of the present invention is a multilayer wiring board, wherein the throwing conductor is disposed in a portion other than a product portion of the multilayer wiring board.
- the throwing conductor is disposed in a portion other than a product portion of the multilayer wiring board.
- One embodiment of the present invention is a multilayer wiring board characterized in that the conductor is formed by curing a conductive paste containing a thermosetting resin.
- a conductive paste as the conductor, it is possible to perform electrical connection between wiring layers by a simple manufacturing method using a printing method, and it is possible to provide a multilayer wiring board with excellent productivity.
- One embodiment of the present invention is a multilayer wiring board characterized in that the conductor is cured and formed upon heating and pressing. Since curing of the conductive paste and curing of the second electrically insulating substrate are performed simultaneously, a multilayer wiring board having excellent productivity can be provided.
- One embodiment of the present invention is a multilayer wiring board, wherein the conductor is already cured before being heated and pressed. Since the conductive paste is hardened before the second electrically insulating base material is applied, the rigidity of the conductor is increased, and as a result, the core material retention of the conductor is improved and the conductor is effectively deformed. Can be suppressed.
- One embodiment of the present invention provides a second electrical insulating property comprising a conductor for interlayer connection.
- the base material is composed of at least a core material and a thermosetting resin, and the thermosetting resin has the property that it melts upon heating and pressurization and decreases to the minimum melt viscosity, and then increases in viscosity and cures.
- the minimum melt viscosity is a multilayer wiring board characterized in that the conductor is set to a viscosity that holds the core material.
- the conductor holds the core material in the state where the viscosity of the thermosetting resin constituting the second electrically insulating substrate is the lowest, and as a result, in the shear direction in the electrically insulating substrate.
- the generated distortion can be suppressed, the deformation of the conductor can be suppressed, and a multilayer wiring board excellent in electrical connectivity can be provided.
- the term "electrical conductor holds the core material" as used herein means that the conductive material that does not decrease in rigidity even at high temperature when the thermosetting resin is softened and reaches a minimum melt viscosity.
- a compressive force is applied between the first wiring and the second wiring, and as a result, the conductor acts as a pile against the core of the second electrically insulating substrate. That is, due to the throwing effect of the conductor, the core material of the second electrically insulating substrate follows the dimensional change of the first electrically insulating substrate.
- One embodiment of the present invention is a multilayer wiring board characterized in that the first electrically insulating substrate having the first wiring on the surface is a multilayer wiring board. Conductor deformation is likely to occur.By changing the dimensions of the outermost layer of the high-layer substrate following the second electrically insulating substrate, deformation of the conductor can be suppressed. As a result, a high-density multilayer wiring board with excellent electrical connectivity can be provided.
- One embodiment of the present invention is a multilayer wiring board characterized in that the multilayer wiring board has a conductor disposed in all layers and is V-shaped. A high-density multilayer wiring board with excellent electrical connection reliability can be provided.
- One embodiment of the present invention includes a through-hole forming step of forming a through-hole in an electrically insulating substrate, a filling step of filling the through-hole with a conductor, an electrically insulating substrate and a double-sided wiring And a heating and pressurizing step for heating and pressurizing the stacked structure, and the through hole formed in the through hole forming step forms an anchoring conductor.
- a method for manufacturing a multilayer wiring board comprising a through hole for anchoring. Due to the presence of the conductor for throwing, the electrically insulating base material changes in dimensions following the double-sided wiring board under heating and pressurization. Suppresses distortion that occurs in the cutting direction and suppresses deformation of the conductor. Since it is possible to ensure a strong contact between the conductor and the wiring material, it is possible to provide a multilayer wiring board having excellent electrical connectivity.
- the electrically insulating substrate is heated and pressurized with both surfaces sandwiched between the same kind of materials, the electrically insulating substrate is less likely to be distorted in the shear direction. It is possible to realize electrical connectivity with such a conductor.
- One embodiment of the present invention is a laminated structure in which a conductor forming step for forming a conductor on a wiring material, at least a wiring material, an electrically insulating substrate, and a double-sided wiring board are stacked. And a patterning step for patterning the wiring material.
- the conductor formed in the conductor forming step is used for throwing.
- a method for producing a multilayer wiring board comprising: Due to the presence of the throwing conductor, the electrically insulating base material undergoes dimensional changes following the double-sided wiring board in heating and pressurization, thereby causing distortion in the shearing direction in the electrically insulating base material. As a result, the deformation of the conductor is suppressed, and a strong contact between the conductor and the wiring material can be secured, and a multilayer wiring board excellent in electrical connectivity can be provided. .
- One embodiment of the present invention is a stacked structure in which a conductor forming step for forming a conductor on a double-sided wiring board, at least a double-sided wiring board, an electrically insulating base material, and a wiring material are stacked. And a pattern forming step for patterning the wiring material.
- the conductor formed in the conductor forming step is a throwing conductor.
- a method for producing a multilayer wiring board comprising: Due to the presence of the throwing conductor, the electrically insulating base material changes its dimensions following the double-sided wiring board when heated and pressurized, thereby suppressing distortion occurring in the cutting direction in the electrically insulating base material.
- the deformation of the conductor is suppressed, a strong contact between the conductor and the wiring material can be ensured, and a multilayer wiring board excellent in electrical connectivity can be provided.
- the step of turning the member over after the conductor forming step is eliminated, and the production step can be simplified.
- the electrically insulating substrate is at least a core material and a thermosetting resin.
- the thermosetting resin is of a property that melts in the heating and pressurizing step and decreases to the minimum melt viscosity, then increases in viscosity and cures.
- the minimum melt viscosity is the core of the conductor.
- the conductor holds the core in the state where the viscosity of the thermosetting resin constituting the electrically insulating substrate is the lowest, as a result, the strain generated in the shear direction in the electrically insulating substrate This can suppress the deformation of the conductor and can provide a multilayer wiring board with excellent electrical connectivity.
- the heating and pressurizing step heats and pressurizes the laminated structure via a press plate, and the temperature between the laminated structure and the press plate is reached before the stacking deviation start temperature is reached.
- the stacking deviation start temperature is caused by the difference in the thermal expansion behavior between the press plate and the double-sided wiring board in the laminate structure.
- One embodiment of the present invention is a method for producing a multilayer wiring board, wherein the deviation generating step is performed by pressurizing at a pressure lower than the pressure applied at the time of the lowest melt viscosity of the electrically insulating substrate. .
- the deviation generating step is performed by pressurizing at a pressure lower than the pressure applied at the time of the lowest melt viscosity of the electrically insulating substrate.
- the heating and pressurizing step heats and pressurizes the laminated structure via the press plate, and the thermal expansion coefficient of the press plate is a double-sided surface constituting the laminated structure.
- a method for manufacturing a multilayer wiring board characterized by having substantially the same thermal expansion coefficient as that of the wiring board. Reduce the stress in the shearing direction that is applied to the electrically insulating base material by making the thermal expansion coefficient of the press plate and double-sided wiring board approximately the same below the stacking deviation start temperature. As a result, the conductor can be prevented from being deformed in the shearing direction, and a multilayer wiring board excellent in electrical connectivity can be provided.
- One embodiment of the present invention is a method for producing a multilayer wiring board, wherein the press plate has a multilayer structure comprising a high-rigidity portion on the surface and an internal thermal expansion adjusting portion.
- the thermal expansion properties can be set more delicately, and the difference in thermal expansion from the double-sided wiring board can be further reduced. It is possible to provide a multilayer wiring board that suppresses the deformation of the substrate and has excellent electrical connectivity.
- One embodiment of the present invention is a method for manufacturing a multilayer wiring board in which the double-sided wiring board is replaced with a multilayer wiring board.
- a high-density multilayer wiring board can be provided while ensuring stable electrical connectivity with a conductor.
- One embodiment of the present invention includes a first electrically insulating substrate having a first wiring on the surface, a second electrically insulating substrate for interlayer adhesion, and a second surface on the outermost layer surface.
- the wiring is a multilayer wiring board that is laminated by heating and pressing, and the first wiring and the second wiring are electrically connected by a conductor disposed through the second electrically insulating substrate.
- the second electrically insulating base material is a multi-layered wiring board characterized in that the second electrically insulating base material has a laminated structure whose dimensions change following the expansion and contraction of the first electrically insulating base material! .
- the second electrically insulating substrate When the second electrically insulating substrate is heated and pressurized, it changes in size following the first electrically insulating substrate, generating in the shear direction in the second electrically insulating substrate. Distortion can be suppressed. As a result, the deformation of the conductor can be suppressed, and a strong contact between the conductor and the wiring material can be secured, and a multilayer wiring board excellent in electrical connectivity can be provided. In addition, since the conductor formed on the electrically insulating substrate does not deform in the shear direction, distortion of the coordinate position of the conductor can be suppressed. As a result, the wiring pattern (via land) matching the conductor can be suppressed. The clearance can be designed to be small and a high-density multilayer wiring board can be provided.
- One embodiment of the present invention includes a through-hole forming step for forming a through-hole in an electrically insulating substrate, a filling step for filling the through-hole with conductivity, and at least one of the double-sided wiring boards.
- a laminating step in which an electrically insulating substrate and a wiring material are laminated to form a laminated structure, a heating and pressing step in which the laminated structure is attached by heating and pressing, and a wiring material.
- a pattern forming step for turning, and in the heating and pressurizing step, the electrically insulating base material changes in dimensions following the double-sided wiring substrate.
- the strain generated in the shear direction in the electrically insulating substrate is suppressed, and the deformation of the conductor is suppressed.
- One embodiment of the present invention includes a through hole forming step of forming a through hole in an electrically insulating base material, a filling step of filling the through hole with a conductor, and an electrically insulating base material. It comprises a laminating step in which at least two or more double-sided wiring boards are laminated to form a laminated structure, and a heating and pressing step for heating and pressurizing the laminated structure.
- the electrically insulating substrate is heated and pressurized with both surfaces sandwiched between the same kind of materials, it is difficult to generate strain in the shear direction on the electrically insulating substrate, and it is possible to make an electrical connection with a more stable conductor. Can be realized.
- One embodiment of the present invention includes a through-hole forming step for forming a through-hole in an electrically insulating substrate, a filling step for filling the through-hole with conductivity, and at least two or more double-sided wirings.
- a patterning step for laminating a substrate and a wiring material through an electrically insulating substrate to form a layered structure, a heating and pressing step for heating and pressing the layered structure, and a pattern for patterning the wiring material And a step of heating and pressurizing, wherein the electrically insulating base material changes dimensions following the double-sided wiring board.
- the insulating substrate When the insulating substrate is heated and pressurized, it changes its dimensions following the double-sided wiring board, thereby suppressing distortion that occurs in the shearing direction in the insulating substrate and consequently suppressing deformation of the conductor. As a result, a strong contact between the conductor and the wiring material can be ensured, and a multilayer wiring board excellent in electrical connectivity can be provided in a short lead time.
- One embodiment of the present invention is a laminated structure in which a conductor forming step for forming a conductor on a wiring material, and at least a wiring material, an electrically insulating substrate, and a double-sided wiring board are stacked.
- a layer forming step for forming an object, a heat pressurizing step for heating and pressurizing the layered structure, and a pattern forming step for patterning a wiring material. Is a method for manufacturing a multilayer wiring board, characterized in that the dimensions change following the double-sided wiring board.
- the electrical insulating base material changes its dimensions following the double-sided wiring board during heating and pressurization, the strain generated in the shearing direction in the electrical insulating base material is suppressed, and as a result, the deformation of the conductor is suppressed. As a result, it is possible to provide a multi-layer wiring board that can secure a strong contact between the conductor and the wiring material and has excellent electrical connectivity.
- One embodiment of the present invention includes a conductor forming step of forming a conductor on a double-sided wiring board, and at least a double-sided wiring board, an electrically insulating base material, and a wiring material.
- a method for manufacturing a multilayer wiring board characterized in that the dimensions change following the board. When the electrically insulating substrate changes its dimensions following the double-sided wiring board when it is heated and pressurized, it suppresses distortion that occurs in the shear direction in the electrically insulating substrate, resulting in deformation of the conductor.
- FIG. 1 is a cross-sectional view showing a configuration of a multilayer wiring board according to Embodiment 1 of the present invention.
- conductors 4 and 9 are formed in through holes 3 provided in the first electrically insulating base material 1 and the second electrically insulating base material 7, and can be arranged at any place. Since the electrical connection between the wiring layers is made, wiring can be accommodated with high density.
- This multilayer wiring board has a second electrically insulating substrate on both sides of the double-sided wiring board 6 serving as a core.
- the material 7 is laminated by heating and pressing.
- the double-sided wiring board 6 has a configuration in which the first wiring 10 is formed on the front and back surfaces of the first electrically insulating substrate 1.
- the through hole 3 formed in the second electrically insulating substrate 7 is filled with the conductor 4, and the second electrically insulating substrate 7 itself has a function for interlayer adhesion.
- One of the features of the present invention is that the size of the second electrically insulating base material 7 is changed following the expansion and contraction of the double-sided wiring board 6 in the pasting by heating and pressing. By doing so, the distortion generated in the shear direction of the second electrically insulating substrate 7 is suppressed, and the deformation of the conductor 4 is suppressed.
- the strain generated in the shear direction of the second electrically insulating substrate 7 is a strain in a direction substantially parallel to the surface of the substrate 7 and a strain in a direction in which the columnar conductors 4 and 9 are inclined.
- the second electrically insulating substrate 7 is composed of at least a core material 13 and a thermosetting resin 14.
- the boundary between the core material 13 and the thermosetting resin 14 is shown separately, but the present invention is not limited to this form.
- the core material 13 may be impregnated with a thermosetting resin 14. Even in such a case, it is preferable that a layer of the thermosetting resin 14 is formed on the surface of the core material 13 impregnated with the thermosetting resin 14.
- thermosetting resin 14 has a property of being melted during heating and pressurization, and after the viscosity is lowered to the minimum melt viscosity, the viscosity is increased and cured. More preferably, the thermosetting resin 14 holds the core material 13 at the minimum melt viscosity of the thermosetting resin 14.
- thermosetting resin In order that the thermosetting resin can hold the core material of the electrically insulating substrate even when the viscosity of the thermosetting resin is the lowest (that is, the lowest melt viscosity), By setting the viscosity, distortion generated in the shear direction in the electrically insulating substrate is suppressed, and deformation of the conductor is suppressed.
- thermosetting resin 14 holds the core material 13” means that even if the thermosetting resin 14 softens during heating and pressurization, the thermosetting resin 14 It means that the surrounded core material 13 has the same dimensional change behavior as that of the thermosetting resin 14. That is, the best of thermosetting resin 14 By setting the low melt viscosity to a relatively high viscosity, it refers to a state in which the dimensional change due to the thermal expansion coefficient of the core material is regulated.
- thermosetting resin 14 since the thermosetting resin 14 has a low rigidity in the softened state, the dimension changes following the first electrically insulating substrate 1. As a result, the core material 13 of the second electrically insulating substrate 7 changes following the dimensional change of the first electrically insulating substrate 1.
- the material of the core material 13 includes glass fiber woven fabric, nonwoven fabric, aramid fiber woven fabric, nonwoven fabric, fluorine-based resin fiber nonwoven fabric, polyimide resin, fluorine-based resin, liquid crystal polymer.
- a heat-resistant film or a porous film having the same strength can be used.
- thermosetting resin 14 an epoxy resin, a polyimide resin, a PPE resin, a PPO resin, or a phenol resin can be used.
- the thermosetting resin 14 contains a filler in terms of easy adjustment of the melt-cured physical properties of the thermosetting resin.
- a filler inorganic materials such as alumina, silica, and aluminum hydroxide can be used.
- one of the purposes of mixing the filler with the thermosetting resin is to physically adjust the flow of the resin.
- the filler material is not limited to the above-mentioned materials because it may be any filler material that achieves the above-mentioned purpose.
- a filler having a shape of about 0.5 to 5 ⁇ m! / it is preferable to use a filler having a shape of about 0.5 to 5 ⁇ m! /. If it is in the above-mentioned range, it is possible to select a particle size having good dispersibility in the used rosin.
- the filler by mixing the filler with the thermosetting resin, it is possible to suppress a decrease in viscosity with the filler while maintaining a long melting time as the resin material during heating and pressurization. As a result, the wiring 10 can be embedded while suppressing deformation of the electrically insulating base material 7 in the shear direction.
- FIG. 3 shows an enlarged surface layer portion of the state of the second electrically insulating base material 7 attached to the double-sided wiring board 6 on the surface.
- the first wiring 10 and the second surface on the outermost layer surface are formed by using the conductor 4 for interlayer connectivity provided through the second electrically insulating substrate 7.
- the conductor 4 provided on the second electrically insulating substrate 7 holds the core material 13 at the lowest melt viscosity of the thermosetting resin.
- the conductor 4 holds the core material 13
- the conductor 4 has the first melt viscosity.
- the compressive force applied to the conductor 4 is used to connect the wiring 12 and the wiring 10 on the double-sided wiring board 6 to each other. This is a state in which the throwing effect of the conductor 4 is exhibited. Due to the throwing effect by the conductor 4, the core material 13 of the second electrically insulating substrate 7 follows the dimensional change of the first electrically insulating substrate (double-sided wiring board 6).
- a plurality of conductors 4 are arranged on the second electrically insulating substrate 7.
- the conductor 4 is disposed at a location that does not affect the product design, and it is possible to adopt a diameter different from that of other conductors. In particular, it is preferable to increase the diameter of the conductor 4 for the purpose of improving anchorage.
- a part of the plurality of conductors 4 for connecting the wiring 12 and the wiring 10 plays a role as the throwing conductor 4.
- An example of a location that does not affect the product design shown here is that the entire wiring pattern can be achieved even if the wiring pattern (via land) that matches the conductor whose design wiring density is low is increased. Do not reduce the capacity! /.
- the product section here refers to a unit product area when an electronic component is mounted and a circuit function is realized, and indicates a portion incorporated in an electronic device.
- a conductor 4 (hereinafter referred to as a throwing conductor) for holding the core member 13 other than the product portion of the multilayer wiring board.
- a plurality of product parts 15 are usually arranged on the multilayer wiring board 16.
- a plurality of product parts such as a single multilayer wiring board, are cut out by external processing by mold processing or router processing. Therefore, it is not included in the product area within the plane of multilayer wiring board 16.
- There is a new area For example, there are regions such as regions 162 and 163 between the peripheral portion 161 and the product portion 15 of the multilayer wiring board 16. It is effective to provide the throwing conductor 4 in these portions. In this case, the throwing conductor 4 may not be involved in the connection between the wiring 12 and the wiring 10 in the product section 15. By disposing the conductor 4 in this way, the core material retaining property by the conductor 4 in the surface of the electrically insulating substrate 7 can be further improved.
- the throwing conductor 4 provided outside the product part is provided with a wiring 10 corresponding thereto.
- a compressive force is applied to the conductor 4 by the thickness of the wiring 10, and the throwing effect can be further enhanced.
- a glass epoxy substrate having a thickness of 60 ⁇ m was used as the first electrically insulating substrate 1 of the double-sided wiring board 6, and a glass epoxy substrate having a thickness of 40 m was used as the electrically insulating substrate 7.
- An example is shown in which a conductive paste having a diameter of 150 m, which has epoxy resin and copper powder power, is used as the conductor 4.
- the throwing effect of the conductor was confirmed when the average number of conductors on a large-sized wiring board was 10 or more Zcm2. Furthermore, when the number of conductors was 20 or more Zcm2, it was confirmed that a uniform throwing effect was exhibited in the plane.
- the wiring 12 shown in FIG. 1 has a foil-like wiring material applied to the surface of the electrically insulating substrate 7, and then a photosensitive resist is applied, the photosensitive resist is exposed and developed, and an opening portion is formed. Etching is performed to remove the photosensitive resist. For the exposure of the photosensitive resist, a pattern drawn so as to shield light from the film is transferred using a film mask to form a wiring pattern.
- the position of the wiring pattern (via land) that matches the conductor needs to be drawn in advance on the film mask. Therefore, when the position of the conductor described above is distorted, it is necessary to increase the diameter of the wiring pattern (via land) that matches the conductor so as to allow the distortion.
- the multilayer wiring board of the present embodiment is formed on an electrically insulating base. As a result, the distortion of the coordinate position of the conductor is suppressed. As a result, the clearance of the wiring pattern (via land) matching the conductor can be designed to be small, and a high-density multilayer wiring board can be provided.
- FIG. 1 shows a structure in which a double-sided wiring board 6 serving as a core is electrically connected by filling a through hole 3 with a conductor 9.
- the structure of the double-sided wiring board 6 serving as the core is not limited to this, and the same effect can be obtained with the double-sided wiring board 6 having a structure in which a conductor is formed on the wall surface of the through hole by plating or the like.
- the number of core wiring board layers is not limited to the double-sided wiring board, but may be a multilayer wiring board.
- the second electrically insulating substrate is changed in size following the core portion as the first electrically insulating substrate, as in the present invention.
- the deformation of the conductor can be suppressed even in the strong multilayer wiring board structure in which the conductor is easily deformed. As a result, a multilayer wiring board having eight or more wiring layers can be realized.
- a higher-density multilayer wiring board can be provided by disposing an electrically insulating base material provided with a conductor filled in through holes in all layers.
- the above-described conductor 4 is a conductive paste made of conductive particles and thermosetting resin, and this conductive paste is already cured when the electrically insulating substrate 7 is applied. It is preferable. When the electrically insulating base material 7 is attached by heating and pressing, the conductive paste is cured, so that the rigidity of the conductor is increased, and as a result, the anchoring property of the conductor can be further improved.
- the conductive paste may be cured simultaneously with the curing of the electrically insulating substrate 7.
- the curing step can be simplified, and a multilayer wiring board excellent in productivity can be provided.
- the conductive paste is cured simultaneously with the curing of the electrically insulating substrate 7, it is more preferable to set the curing start temperature of the conductive paste to be lower than the curing start temperature of the electrically insulating substrate 7.
- the conductive paste is cured first, so that the electrically insulating substrate 7
- the viscosity of the conductive paste decreases, the compression of the conductive paste increases, and as a result, the anchoring property of the conductor can be improved.
- the protective film 2 is pasted on the front and back surfaces of the electrically insulating substrate 1.
- the material of the electrically insulating substrate 1 a composite substrate of fibers and impregnated resin can be used.
- a woven fabric such as glass fiber, aramid fiber, fluorine-based fiber, or liquid crystal polymer can be used.
- epoxy resin, polyimide resin, PPE resin, PPO resin, phenol resin, etc. can be used as the impregnated resin.
- the base material is compressible, that is, the thickness shrinks when the base material is cured by hot pressing, from the viewpoint of electrical connectivity in a through-hole by a conductor described later. More preferably, it has properties. Specifically, a porous base material impregnated with a resin so that pores exist in the fiber is more preferable.
- a material having a three-layer structure in which an adhesive layer is provided on both sides of a film, which is used for a flexible wiring board as an electrically insulating substrate can also be used.
- a base material in which an adhesive layer is provided on both surfaces of a thermoplastic film base material such as a thermosetting resin film such as epoxy, a fluororesin, a polyimide resin, or a liquid crystal polymer.
- a thermoplastic film base material such as a thermosetting resin film such as epoxy, a fluororesin, a polyimide resin, or a liquid crystal polymer.
- the protective film 2 is a film made of polyethylene terephthalate (PET) or polyethylene naphthalate (PEN) as a main component and laminated on both surfaces of the electrically insulating substrate 1 by lamination. It is easy to apply and productive! It is a manufacturing method.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- a through-hole 3 penetrating the protective film 2 and the electrically insulating substrate 1 is formed.
- the through hole 3 can be formed by punching, drilling force, or laser processing.
- a carbon dioxide laser or YAG laser is used, the small-diameter through hole 3 can be formed in a short time, and an excellent productivity can be realized.
- the through hole 3 is filled with the conductor 9.
- a conductive paste is used as the material of the conductor 9, a printing method can be used, which is more preferable in terms of productivity.
- This conductive paste is composed of conductive particles of a metal such as copper, silver or gold or an alloy thereof and a thermosetting resin component.
- the conductor 9 is not limited to these materials as long as electrical connectivity can be ensured. For example, conductive particles may be filled.
- the particle diameter of the conductive particles is preferably set in accordance with the diameter of the through hole 3. As an example, for 50 to 200 ⁇ m through-hole diameters, it is preferable to use conductive particles having an average particle diameter of 1 to 5 ⁇ m. In order to stabilize the electrical connectivity, it is more preferable that the conductive particles are pre-selected so as to have a uniform particle size.
- the protective film 2 plays a role of protecting the conductor 9 from adhering to the surface of the electrically insulating substrate and a role of ensuring the filling amount of the conductor.
- the protective film 2 is peeled off, and the wiring material 5 is laminated on both sides of the electrically insulating substrate 1 to obtain the state shown in FIG. 5D.
- the filling amount of the conductor 9 is secured by the protective film 2. That is, the conductor 9 is in a state of protruding from the surface of the electrically insulating substrate 1 by the height of the thickness of the protective film 2.
- the wiring material 5 a copper foil having a roughened surface can be used.
- a surface treatment layer is adhered in a large amount, since these surface treatment layers have insulating properties, electrical contact with the conductor 9 is hindered, and as a result, in the multilayer wiring board. Via connection reliability will be degraded.
- the metal material for example, copper when the wiring material is copper foil
- the base material of the wiring material between the surface treatment layers is 50 nm or less. It is more preferable to form with a very thin thickness.
- the wiring material 5 is bonded to both sides of the electrically insulating substrate 1 by heating and pressing, and the conductor 9 is compressed in the thickness direction, so that the wiring material on the front and back surfaces is obtained. Connect 5 electrically.
- a pattern is formed by exposure and development.
- a dry film type and a liquid type can be used as the resist.
- fine pattern formation it is of course possible to print and form a resist material by screen printing or the like without using a photosensitive material!
- the double-sided wiring board 6 shown in FIG. 5F is manufactured.
- an electrically insulating base material manufactured by the same steps as shown in FIGS. 5A to 5D and filled with the conductor 4 7 and the wiring material 8 are stacked and formed to form a stacked structure (particularly, not labeled).
- the wiring material 8 may be the same copper foil used in FIG. 5D.
- this wiring material 8 is the outermost layer of a multilayer wiring board, it is preferable to use a so-called single-sided glossy foil with only one side roughened to flatten the surface of the electronic component mounting surface.
- the laminated material is further sandwiched by the press plate 11 from above and below, and the wiring material 8 is heated and pressed to adhere to the electrically insulating substrate 7.
- the double-sided wiring board 6 and the electrically insulating base material 7 are also bonded.
- the electrical insulating base material 7 follows the double-sided wiring board 6 and changes its size, thereby suppressing the distortion generated in the shear direction of the electrical insulating base material, resulting in the result.
- deformation of the conductor 9 can be suppressed.
- the conductor formed on the electrically insulating substrate does not deform in the shear direction, distortion of the coordinate position of the conductor can be suppressed.
- the clearance of the wiring pattern (via land) that matches the conductor can be designed to be small, and a high-density multilayer wiring board can be provided.
- a multilayer wiring board shown in FIG. 51 can be formed.
- the electrical insulating base material 7 is composed of a core material and a thermosetting resin on the multilayer wiring board of the present embodiment.
- the thermosetting resin can hold the core material at the minimum melt viscosity of the thermosetting resin. Therefore, the shearing direction shift of the electrically insulating substrate 7 is suppressed, and as a result, the shape of the conductor 9 is maintained.
- the core material holding action at the minimum melt viscosity of the thermosetting resin can be realized by increasing the minimum melting temperature of the thermosetting resin.
- thermosetting resin As a method for increasing the minimum melting temperature of the thermosetting resin, a method of preheating the thermosetting resin and adjusting the degree of curing may be used. Further, a filler may be mixed with the thermosetting resin. The melt-cured physical properties of the thermosetting resin can be easily adjusted by selecting the type, particle size or blending amount of the filler.
- the filler an inorganic material such as alumina, silica, hydroxide-aluminum, or the like can be used.
- the filler material is not limited to these if the purpose is satisfied. .
- the shape of the filler it is preferable to use a filler having an outer diameter of about 0.5 to 5 / zm. When the particle size is within this range, the dispersibility in cocoa is good.
- thermosetting resin By mixing the above-mentioned filler with thermosetting resin, it is possible to suppress a decrease in viscosity with the filler while maintaining a long melting time as a resin material during heating and pressurization. As a result, the wiring 10 can be embedded while suppressing deformation in the shear direction of the electrically insulating base material 7.
- the conductor 4 provided on the electrically insulating substrate 7 holds the core material at the minimum melt viscosity of the thermosetting resin.
- the conductor 4 is connected between the wiring 12 and the wiring 10 on the double-sided wiring board 6. Is demonstrated.
- the product section here refers to a unit product area when an electronic component is mounted and a circuit function is realized, and refers to a portion incorporated in an electronic device.
- the heating and pressurizing step the state before reaching the stacking deviation start temperature of the electrically insulating substrate 7 at the time of temperature rise, that is, below the stacking deviation start temperature, between the wiring material and the press plate in the stacked structure. It is more preferable to provide a step for generating a deviation.
- the stacking misalignment start temperature means that the electrical insulating base material 7 softens when the temperature rises by heating, and shear is caused by the difference in thermal expansion behavior between the press plate 11 and the double-sided wiring board 6 in the laminated structure. This is the temperature at which the deviation occurs.
- the deviation between the wiring material and the press plate is less than the stacking deviation start temperature at the time of temperature rise.
- the deviation between the wiring material and the press plate at the time of temperature rise in the step of generating the deviation is added at the lowest melt viscosity of the electrically insulating base material at or below the stacking deviation start temperature of the electrically insulating base material. This can be realized by pressurizing at a pressure lower than the pressure.
- the surface of the press plate or the wiring material is finely roughened, and the contact area seen microscopically is reduced, so that the displacement between the wiring material and the press plate is more likely to occur. it can.
- the thermal expansion coefficient is set to substantially the same as that of the double-sided wiring board 6 at a temperature equal to or lower than the lamination deviation start temperature of the electrically insulating base material 7.
- the press plate 11 it is preferable to use a stainless steel plate, an aluminum alloy, a copper alloy, a ceramic plate or the like. It is preferable to select a material having the same thermal expansion coefficient as that of the double-sided wiring board 6 as the material of the press plate 11.
- the press plate 11 has a multilayer structure including a high-rigidity portion on the surface and an internal thermal expansion adjusting portion.
- the high-rigidity part it is preferable to use a metal plate, a heat-resistant resin sheet, a ceramic sheet, a fiber / resin composite sheet, or the like, as the internal thermal expansion adjustment part, in which a stainless material is preferred.
- a metal plate a heat-resistant resin sheet, a ceramic sheet, a fiber / resin composite sheet, or the like
- the internal thermal expansion adjustment part in which a stainless material is preferred.
- a method for manufacturing a multilayer wiring board that has excellent electrical connectivity and enables high-density wiring design by suppressing deformation in the shear direction of a conductor. Can be provided.
- a laminated structure is formed by laminating and arranging an electrically insulating base material filled with a conductor and a wiring material on both sides of a double-sided wiring board.
- a method of laminating two or more double-sided wiring boards via an electrically insulating substrate filled with a conductor to form a laminated structure, or two or more double-sided wiring boards and a wiring material It is also possible to adopt a method in which a laminated structure is formed by laminating the above via an electrically insulating substrate filled with a conductor.
- a conductor 17 is formed on the surface of the wiring material 5.
- a metal foil can be used as the wiring material 5, and it is particularly preferable to use a copper foil having a roughened surface.
- a conductive paste made of conductive particles and a thermosetting resin is used as in the example shown in the first embodiment.
- a screen printing method which is a simple manufacturing method, is used.
- the wiring material 5 on which the conductor 17 is formed, the electrically insulating base material 1 and the wiring material 5 are laminated.
- the material of the electrically insulating substrate 1 a composite material of fiber and resin, a material in which an adhesive is formed on the film surface, or the like can be used.
- the conductor 17 is penetrated through the electrically insulating substrate 1 by heating and pressing, and the conductor 17 is compressed in the thickness direction, whereby the wiring material on the front and back surfaces is obtained. Are electrically connected.
- the double-sided wiring board 6 shown in FIG. 6D is obtained.
- the wiring board 6 is laminated and a laminated structure is formed.
- the laminated structure is further sandwiched between the pressing plates 11 and heated and pressurized.
- the conductor 18 penetrates the electrically insulating base material 7 so that the wiring material 5 and the wiring material 8 are electrically connected, and the electrically insulating base material 7 is connected to the double-sided wiring board 6 and the wiring. Adhere to material 8.
- the electrical insulating base material 7 is made to follow the double-sided wiring board 6 and the dimensions thereof are changed. As a result, the deformation of the conductor 18 can be suppressed.
- the multilayer wiring board shown in FIG. 6G can be formed.
- the conductor 18 is cured in advance before the heating and pressing step. Therefore, the rigidity of the conductor is increased, and as a result, the throwing effect of the conductor is enhanced, and the occurrence of deviation in the shear direction of the electrically insulating substrate can be suppressed.
- the electrical connectivity is excellent.
- FIGS. 7A to 7G Parts that overlap with the examples already described will be described in a simplified manner.
- the definition of terms in the following description is the same as in the first and second embodiments.
- the conductor 17 is formed on the surface of the wiring material 5 as shown in FIG. 7A.
- a metal foil can be used, and it is particularly preferable to use a copper foil whose surface is roughened.
- the conductor 17 the same material and construction method as in the example shown in Embodiment 3 can be used.
- the wiring material 5 on which the conductor 17 is formed, the electrically insulating base material 1, and the wiring material 5 are laminated.
- the material of the electrically insulating substrate 1 the materials already described in the embodiment 3 can be used.
- the wiring material 8 formed in the same steps as shown in FIG. 7A and having the conductor 18 formed on the surface, the electrically insulating substrate 7, the surface A laminated structure is formed by laminating and arranging the double-sided wiring board 6 on which the conductor 18 is formed by the same method as in FIG. 7A.
- the electrical insulating base material 7 is made to follow the double-sided wiring board 6 and the dimensions thereof are changed.
- the distortion generated in the breaking direction is suppressed, and as a result, the deformation of the conductor 18 is suppressed.
- Electrical As a technique for causing the insulating base material 7 to follow the double-sided wiring board 6, the technique already described in the first embodiment can be used.
- the multilayer wiring board shown in FIG. 7G can be formed.
- the conductor 18 is hardened before the heating and pressing step, the rigidity of the conductor 18 is increased, and as a result, the anchoring effect of the conductor 18 is increased. It is possible to suppress the occurrence of deviation in the shear direction of the electrically insulating substrate.
- the conductor 18 on the double-sided wiring board that is formed only by the wiring material, the surface on which the conductor is formed can be unified in one direction in the stacking step. As a result, there is no step of turning the member over after the conductor forming step, and the production steps can be simplified.
- the force lamination structure is an example in which a set of stacked objects is sandwiched between press plates during the heating and pressing step, and the laminated structure is limited to this. It is not done. For the purpose of increasing productivity, the same effect can be obtained even if molding is performed by laminating a plurality of laminates via a press plate and heating and pressing at once.
- the protective film 2 is formed on the front and back surfaces of the electrically insulating substrate 1.
- the electrically insulating substrate 1 a composite material of a core material and a thermosetting resin can be used, The detailed material structure is already the same as the example described in the first embodiment.
- a through-hole 3 penetrating the protective film 2 and the electrically insulating substrate 1 is formed.
- the through hole 3 is filled with the conductor 9.
- the conductor 9 it is more preferable to use a conductive paste. The reason is already described in the first embodiment.
- the wiring material 5 is bonded to both sides of the electrically insulating substrate 1 by heating and pressurizing, and the conductor 9 is compressed in the thickness direction so that the wiring on the front and back surfaces Connect materials electrically.
- the upper and lower layers of the laminated structure are further sandwiched between the press plates 11 and heated and pressurized.
- the multilayer wiring board shown in FIG. 81 can be formed by adhering the double-sided wiring board 6 via the electrically insulating base material 7.
- the electrical insulating base material 7 follows the double-sided wiring board 6 and changes its size, so that the distortion generated in the shear direction of the electrical insulating base material is suppressed, and as a result conductive The deformation of the body 4 is suppressed.
- the technique already described in the first embodiment can be used as a technique for causing the electrically insulating base material 7 to follow the double-sided wiring board 6, the technique already described in the first embodiment can be used.
- the shear stress generated in the electrically insulating base material 7 is not affected. Relatively small. As a result, compared to the example shown in the first embodiment, the advantage that the electrically insulating substrate 7 can be made to follow the double-sided wiring board 6 more easily is exhibited.
- the present invention provides a method for manufacturing a multilayer wiring board that has excellent electrical connectivity and enables high-density wiring design by suppressing deformation in the shear direction of a conductor. be able to. [0184] (Embodiment 6)
- the protective film 2 is formed on the front and back surfaces of the electrically insulating substrate 1.
- the electrically insulating substrate 1 a composite material of a core material and a thermosetting resin can be used.
- a through hole 3 penetrating both the protective film 2 and the electrically insulating substrate 1 is formed.
- the through hole 3 is filled with the conductor 9. It is more preferable to use a conductive paste as the conductor 9.
- the protective film 2 is peeled, and the wiring material 5 is laminated on both sides of the electrically insulating substrate 1, whereby the laminate shown in FIG. 9D is obtained.
- the wiring material 5 is bonded to both sides of the electrically insulating substrate 1 by heating and pressing, and the conductor 9 is compressed in the thickness direction. Electrically connect the wiring material on the back side.
- a laminated structure is formed by laminating and arranging one sheet of electrically insulating base material 7.
- the upper and lower layers of the laminated structure are further sandwiched between press plates 11 and heated and pressurized, so that the wiring material 8 passes through the double-sided wiring board 6 and the electrically insulating base material 7. Glue.
- the electrical insulating base material 7 follows the double-sided wiring board 6 and changes its dimensions, thereby suppressing the distortion that occurs in the shear direction of the electrical insulating base material. As a result, the deformation of the conductor 9 is suppressed.
- the technique already described in the first embodiment can be used.
- a plurality of double-sided wiring boards are formed in advance, and a desired number of layers of wiring boards are formed by heating and pressing at once through an electrically insulating base material. ing.
- a method for manufacturing a multilayer wiring board that has a short lead time, excellent electrical connectivity, and enables high-density wiring design.
- FIG. 91 shows an example of a six-layer wiring board, but the number of wiring board layers in the present invention is not limited to this. The same effect can be obtained with a multilayer wiring board with a larger number.
- a multilayer wiring board of the present invention it is possible to provide a multilayer wiring board that is excellent in electrical connectivity and enables high-density wiring design by a simple manufacturing method. Can do.
- the force lamination structure is shown in which an example in which a set of stacked objects are sandwiched between press plates during the heating and pressurizing step is performed. It is not done. For the purpose of increasing productivity, the same effect can be obtained even if molding is performed by laminating a plurality of laminates via a press plate and heating and pressing at once.
- the multilayer wiring board and the method for manufacturing the multilayer wiring board according to the present invention suppress distortion in the shear direction of the electrically insulating substrate when the electrically insulating substrate is attached by heating and pressing. By suppressing the deformation of the conductor provided on the electrically insulating base material, it is possible to provide a multilayer wiring board having excellent electrical connectivity. In addition, since the conductor formed on the electrically insulating substrate does not deform in the shear direction, distortion of the coordinate position of the conductor can be suppressed. As a result, the wiring pattern (via land) that matches the conductor Therefore, it is possible to provide a high-density multilayer wiring board. That is, the present invention This is useful for high-density multilayer wiring boards with an all-layer IVH structure with interlayer connection using conductors.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/279,890 US20100224395A1 (en) | 2006-03-28 | 2007-03-27 | Multilayer wiring board and its manufacturing method |
CN200780011258XA CN101411253B (zh) | 2006-03-28 | 2007-03-27 | 多层布线基板及其制造方法 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006087037A JP4797743B2 (ja) | 2006-03-28 | 2006-03-28 | 多層配線基板の製造方法 |
JP2006087036A JP4797742B2 (ja) | 2006-03-28 | 2006-03-28 | 多層配線基板とその製造方法 |
JP2006-087037 | 2006-03-28 | ||
JP2006-087036 | 2006-03-28 |
Publications (1)
Publication Number | Publication Date |
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WO2007114111A1 true WO2007114111A1 (ja) | 2007-10-11 |
Family
ID=38563380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/056290 WO2007114111A1 (ja) | 2006-03-28 | 2007-03-27 | 多層配線基板とその製造方法 |
Country Status (3)
Country | Link |
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US (1) | US20100224395A1 (ja) |
TW (1) | TW200803686A (ja) |
WO (1) | WO2007114111A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102196679A (zh) * | 2010-03-10 | 2011-09-21 | 富士通株式会社 | 制造多层印刷配线板的方法和多层印刷配线板 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5436774B2 (ja) * | 2007-12-25 | 2014-03-05 | 古河電気工業株式会社 | 多層プリント基板およびその製造方法 |
KR20110113980A (ko) * | 2010-04-12 | 2011-10-19 | 삼성전자주식회사 | 필름을 포함한 다층 인쇄회로기판 및 그 제조 방법 |
KR101767381B1 (ko) * | 2010-12-30 | 2017-08-11 | 삼성전자 주식회사 | 인쇄회로기판 및 이를 포함하는 반도체 패키지 |
US20120298412A1 (en) * | 2011-05-25 | 2012-11-29 | Samsung Electro-Mechanics Co., Ltd. | Printed circuit board and method of manufacturing the same |
KR20140008923A (ko) * | 2012-07-13 | 2014-01-22 | 삼성전기주식회사 | 코어리스 인쇄회로기판 및 그 제조 방법 |
KR20140047967A (ko) * | 2012-10-15 | 2014-04-23 | 삼성전기주식회사 | 다층형 코어리스 인쇄회로기판 및 그 제조 방법 |
CN104244614A (zh) * | 2013-06-21 | 2014-12-24 | 富葵精密组件(深圳)有限公司 | 多层电路板及其制作方法 |
US9821541B2 (en) * | 2015-07-14 | 2017-11-21 | uBeam Inc. | Laminate material bonding |
CN208159009U (zh) * | 2015-11-10 | 2018-11-27 | 株式会社村田制作所 | 树脂多层基板 |
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JP2000101248A (ja) * | 1998-09-24 | 2000-04-07 | Ibiden Co Ltd | 多数個取り多層プリント配線板 |
JP2003209356A (ja) * | 2002-01-15 | 2003-07-25 | Denso Corp | 多層基板の製造方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0247575B1 (en) * | 1986-05-30 | 1993-07-21 | Furukawa Denki Kogyo Kabushiki Kaisha | Multilayer printed wiring board and method for producing the same |
US5808874A (en) * | 1996-05-02 | 1998-09-15 | Tessera, Inc. | Microelectronic connections with liquid conductive elements |
US6753483B2 (en) * | 2000-06-14 | 2004-06-22 | Matsushita Electric Industrial Co., Ltd. | Printed circuit board and method of manufacturing the same |
TW200505304A (en) * | 2003-05-20 | 2005-02-01 | Matsushita Electric Ind Co Ltd | Multilayer circuit board and method for manufacturing the same |
US7332821B2 (en) * | 2004-08-20 | 2008-02-19 | International Business Machines Corporation | Compressible films surrounding solder connectors |
-
2007
- 2007-03-27 US US12/279,890 patent/US20100224395A1/en not_active Abandoned
- 2007-03-27 TW TW096110506A patent/TW200803686A/zh not_active IP Right Cessation
- 2007-03-27 WO PCT/JP2007/056290 patent/WO2007114111A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000101248A (ja) * | 1998-09-24 | 2000-04-07 | Ibiden Co Ltd | 多数個取り多層プリント配線板 |
JP2003209356A (ja) * | 2002-01-15 | 2003-07-25 | Denso Corp | 多層基板の製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102196679A (zh) * | 2010-03-10 | 2011-09-21 | 富士通株式会社 | 制造多层印刷配线板的方法和多层印刷配线板 |
Also Published As
Publication number | Publication date |
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TW200803686A (en) | 2008-01-01 |
TWI378755B (ja) | 2012-12-01 |
US20100224395A1 (en) | 2010-09-09 |
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