WO2009101723A1 - 電子部品内蔵基板の製造方法 - Google Patents
電子部品内蔵基板の製造方法 Download PDFInfo
- Publication number
- WO2009101723A1 WO2009101723A1 PCT/JP2008/067280 JP2008067280W WO2009101723A1 WO 2009101723 A1 WO2009101723 A1 WO 2009101723A1 JP 2008067280 W JP2008067280 W JP 2008067280W WO 2009101723 A1 WO2009101723 A1 WO 2009101723A1
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- WIPO (PCT)
- Prior art keywords
- electronic component
- substrate
- conductor pattern
- manufacturing
- protective film
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- H01L2924/01093—Neptunium [Np]
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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
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/14—Integrated circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0335—Layered conductors or foils
- H05K2201/0341—Intermediate metal, e.g. before reinforcing of conductors by plating
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- 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
- H05K2201/0347—Overplating, e.g. for reinforcing conductors or bumps; Plating over filled vias
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- 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
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- 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
- H05K2201/095—Conductive through-holes or vias
- H05K2201/0959—Plated through-holes or plated blind vias filled with insulating material
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- 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
- H05K2201/0969—Apertured conductors
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- 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
- H05K2201/09818—Shape or layout details not covered by a single group of H05K2201/09009 - H05K2201/09809
- H05K2201/09918—Optically detected marks used for aligning tool relative to the PCB, e.g. for mounting of components
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- 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
- H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
- H05K2201/10621—Components characterised by their electrical contacts
- H05K2201/10674—Flip chip
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- 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
- H05K2203/03—Metal processing
- H05K2203/0361—Stripping a part of an upper metal layer to expose a lower metal layer, e.g. by etching or using a laser
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- 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
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- 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
- H05K3/22—Secondary treatment of printed circuits
- H05K3/24—Reinforcing the conductive pattern
- H05K3/243—Reinforcing the conductive pattern characterised by selective plating, e.g. for finish plating of pads
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- 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
- H05K3/425—Plated through-holes or plated via connections characterised by the sequence of steps for plating the through-holes or via connections in relation to the conductive pattern
- H05K3/427—Plated through-holes or plated via connections characterised by the sequence of steps for plating the through-holes or via connections in relation to the conductive pattern initial plating of through-holes in metal-clad substrates
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- 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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- H—ELECTRICITY
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- 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
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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.
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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
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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.
- Y10T29/49144—Assembling to base an electrical component, e.g., capacitor, etc. by metal fusion
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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.
- Y10T29/49155—Manufacturing circuit on or in base
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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.
- Y10T29/49155—Manufacturing circuit on or in base
- Y10T29/49165—Manufacturing circuit on or in base by forming conductive walled aperture in base
Definitions
- the present invention relates to a method of manufacturing an electronic component built-in substrate in which electronic components such as semiconductor elements are accommodated.
- Patent Document 1 The electronic module manufacturing method disclosed in Patent Document 1 will be briefly described as follows. (1) A base material provided with a conductor layer made of copper or the like on the surface of a support plate such as aluminum is prepared, and a plurality of recesses are formed on the surface (conductor layer side) of the base material using a laser or the like. . These recesses are formed so as to correspond to the respective terminals of the electronic component to be mounted. (2) The electronic components are arranged on the base material so that the terminals are aligned with the corresponding concave portions, and are fixed via an adhesive layer. (3) An insulating layer and a conductor layer are laminated on a base material on which electronic components are arranged, and pressed. (4) A through-hole is provided in the substrate after pressing, and the conductor layers on both main surfaces of the substrate are made conductive by copper plating. (5) A conductor pattern is formed by a subtractive method.
- the formation of the conductor pattern that is electrically connected to the electronic component is performed by the subtractive method.
- the subtractive method is a method in which an etching resist is formed on a metal foil or a conductor layer, and a portion of the metal foil or conductor layer where the etching resist is not formed is removed by etching with an etching solution to form a conductor pattern. (See Printed Wiring Technology Reading Book: Nikkan Kogyo Shimbun)
- a phenomenon occurs in which the metal foil or conductor layer under the etching resist is dissolved and removed in the horizontal direction.
- Patent Document 1 it is difficult to incorporate an electronic component having a narrow pitch between adjacent terminals, that is, an electronic component having a narrow pitch terminal.
- the pad diameter for connecting to the electronic component is not sufficiently secured, and there is a possibility that connection reliability is impaired.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of manufacturing an electronic component built-in substrate that can form a fine pattern and can secure connection reliability with the built-in electronic component.
- the method for manufacturing an electronic component built-in substrate includes: A step of forming a protective film made of metal on at least a part of the metal foil of the support substrate made of a support plate and metal foil; Forming a conductive pattern made of metal on the protective film by an additive method; Placing the electronic component on the substrate on which the conductor pattern is formed, such that the circuit formation surface of the electronic component and the formation surface of the conductor pattern face each other; Coating the electronic component with an insulating resin; Etching the metal foil using a first etchant; and Electrically connecting a terminal of the electronic component and a part of the conductor pattern,
- the protective film does not dissolve in the first etching solution or has a slower etching rate than the metal foil.
- the metal foil and the conductor pattern are made of copper
- the protective film is preferably made of one or more metals selected from nickel, titanium, and tin.
- the first etchant is preferably an alkali etchant.
- the method further includes a step of forming an adhesive resin on the conductor pattern forming surface before the electronic component is arranged, and the electronic component and the substrate are bonded via the adhesive resin.
- the adhesive resin preferably contains an inorganic filler.
- the formation region of the adhesive resin is wider than the area of the circuit formation surface of the electronic component.
- the conductor pattern may include a mark for positioning when the electronic component is arranged.
- the protective film may be formed to match the pattern shape of the conductor pattern to be formed.
- the protective film may be formed on the entire surface of the metal foil.
- the method further includes a step of etching away the protective film in unnecessary portions using the second etching solution. It is preferable that the conductor pattern does not dissolve in the second etching solution or has a slower etching rate than the protective film.
- an electronic component built-in substrate that can be finely patterned and can secure connection reliability with built-in electronic components.
- FIG. 6 is a sectional view (No. 1) showing a stacking step of Embodiment 2.
- FIG. 8 is a cross-sectional view (part 2) illustrating the stacking process of the second embodiment. It is sectional drawing which shows a mode after peeling a carrier from the board
- FIG. 6D is a cross-sectional view illustrating a state in which a via hole and a through hole are formed in the substrate of FIG. 6D. It is sectional drawing which shows a mode after performing the electroless copper plating and the electrolytic copper plating to the board
- FIG. 7A It is sectional drawing of the electronic component built-in board
- FIG. It is sectional drawing which shows the support base material used at the manufacturing process of the electronic component built-in board
- FIG. It is sectional drawing which shows a mode that the plating resist layer was formed on the support base material of FIG. 7A.
- FIG. 7B It is sectional drawing which shows a mode that the copper plating layer was formed in the non-formation part of a plating resist layer in the board
- FIG. 7K It is sectional drawing which shows a mode that the through-hole filler was filled inside the through-hole conductor of the board
- FIG. 5 is a schematic cross-sectional view of the electronic component built-in substrate 1 manufactured by the manufacturing method of the first embodiment.
- the electronic component built-in substrate 1 is used as, for example, a core substrate of a multilayer printed wiring board.
- the electronic component built-in substrate 1 is laminated on the core material 3 so as to cover the electronic component 2, the core material 3 having a penetrating portion (opening) for embedding the electronic component 2, and the core material 3.
- the covering material 4 the adhesive resin 5, the filling resin 6, the inner layer conductor patterns 10 and 50, the outer layer conductor patterns 60 and 70, and the through-hole conductor 80.
- the core material 3 is made of, for example, a base material obtained by impregnating a glass cloth, an aramid nonwoven fabric or a glass nonwoven fabric with an epoxy resin, a BT (bismaleimide triazine) resin, a polyimide resin, or the like, and has a thickness of about 150 ⁇ m.
- the coating material 4 may be a resin base material reinforced with glass fibers, or may be a resin base material made of an inorganic filler and a thermosetting resin.
- the amount of the inorganic filler is preferably 30 wt% to 90 wt%.
- the thickness of the covering material 4 is about 50 ⁇ m.
- the core material 3 and the covering material 4 are base materials reinforced with glass fibers and may further contain 30 to 60 wt% of an inorganic filler.
- the conductor pattern 10 is formed on the first surface side (side facing the circuit formation surface of the electronic component 2) of the electronic component built-in substrate 1 (hereinafter referred to as a first inner layer).
- the conductor pattern 10 has a thickness of about 20 ⁇ m, and a part of the conductor pattern 10 becomes the first inner layer via land 11 and the first inner layer through hole land 13 connected to the through hole conductor 80.
- the via land 11 of the first inner layer is electrically connected to the via conductor 12 that is electrically connected to the terminal 20 of the electronic component 2 such as an IC chip.
- the adhesive resin 5 is, for example, an insulating resin containing an inorganic filler such as silica or alumina, and secures the fixing strength of the electronic component 2 and also the electronic component 2 and the insulating material (for example, the core material 3, the covering material 4, It plays a role of absorbing strain generated by the gap of the thermal expansion coefficient with the filling resin 6).
- the adhesive resin 5 is preferably made of a thermosetting resin and 70 to 90 wt% inorganic filler.
- the filling resin 6 is preferably made of a thermosetting resin and an inorganic filler.
- the inorganic filler for example, Al 2 O 3 , MgO, BN, AlN, or SiO 2 can be used, and the amount of the inorganic filler in that case is preferably 30 to 60 wt%.
- the thermosetting resin for example, an epoxy resin, a phenol resin or a cyanate resin having high heat resistance is preferable, and among them, an epoxy resin having excellent heat resistance is particularly preferable.
- the conductor pattern 50 is formed on the inner side (hereinafter referred to as the second inner layer) of the second surface (the main surface opposite to the first surface) of the electronic component built-in substrate 1 and is connected to the through-hole conductor 80.
- a second inner layer through-hole land 51 is provided. Its thickness is about 20 ⁇ m.
- the first inner layer through-hole land 13 and the second inner layer through-hole land 51 are electrically connected through a through-hole conductor 80.
- the conductor pattern 60 is formed on the first surface (hereinafter referred to as a first outer layer) of the electronic component built-in substrate 1, and is connected to the first outer layer via land 61 and the through-hole conductor 80. 1 through-hole land 81 of one outer layer.
- the thickness of the conductor pattern 60 is about 20 ⁇ m.
- the first outer via land 61 and the first inner via land 11 are electrically connected via a via conductor 12.
- the via conductor 12 is a filled via in which a via hole is filled with copper plating or the like.
- the conductor pattern 70 is formed on the second surface (hereinafter, referred to as a second outer layer) of the electronic component built-in substrate 1, and the second outer layer through-hole land 82 connected to the through-hole conductor 80. Including.
- the thickness of the conductor pattern 70 is about 20 ⁇ m.
- a protective film 105 is interposed between the first inner via land 11 and the first outer via land 61 and between the first inner through-hole land 13 and the first outer through-land land 81. is doing.
- a protective film 505 is interposed between the second inner through-hole land 51 and the second outer through-hole land 82.
- Step of forming conductor pattern 10 First, the support base material 100 shown in FIG. 1A is prepared.
- the support substrate 100 is composed of a copper foil 101 having a thickness of about 3 ⁇ m and a carrier 102 having a thickness of about 75 ⁇ m.
- the carrier (support plate) 102 is made of copper, and is bonded to the copper foil 101 so as to be peeled (separated) through an adhesive layer (peeling layer) (not shown).
- a dry film-like photosensitive resist 103 is laminated on the surface (copper foil 101 side) of the support substrate 100 (see FIG. 1B). Then, a mask film having a predetermined pattern is brought into close contact with the laminated photosensitive resist 103, exposed to ultraviolet rays, and developed with an alkaline aqueous solution. As a result, the plating resist layer 104 having an opening corresponding to only the conductor pattern 10 is formed (see FIG. 1C).
- the substrate of FIG. 1C is washed with water and dried, and then electrolytic nickel plating is performed to form a protective film 105 having a thickness of about 3 ⁇ m (see FIG. 1D). Then, further electrolytic copper plating is performed to form a copper plating layer 106 having a thickness of about 20 ⁇ m on the protective film 105 (see FIG. 1E). Then, when the plating resist layer 104 is removed, washed with water and dried, the substrate of FIG. 1F on which the conductor pattern 10 is formed is obtained.
- the alignment mark 107 is formed simultaneously with the conductor pattern 10.
- the alignment mark 107 is a mark for positioning when the electronic component 2 is placed (mounted).
- the alignment mark 107 may be used as a positioning mark when forming a via hole reaching each terminal 20 of the electronic component 2 or when forming a through hole for the through-hole conductor 80.
- the first inner via land 11 is formed simultaneously with the conductor pattern 10.
- the conductor pattern 10 is formed by growing plating on a portion where the plating resist pattern is not formed (so-called additive method). For this reason, in the present embodiment, the shape of the conductor pattern 10 can be maintained and refinement can be achieved.
- the additive method includes the full additive method and the semi-additive method. Since both processes are well-known (for example, refer to the printed wiring technology book reader: Nikkan Kogyo Shimbun), detailed explanation is omitted.
- the adhesive resin 5 is applied on the conductor pattern 10 of the substrate of FIG. 1F (see FIG. 2A).
- the adhesive resin 5 is an insulating resin containing an inorganic filler such as silica or alumina.
- the filler refers to a dispersion material having an aspect ratio of 1 to 1.2 of the longest length / shortest length.
- the adhesive resin 5 is applied to a predetermined region so as to cover at least the first inner via land 11. This coating region is preferably in a range wider than the area of the circuit forming surface of the electronic component 2.
- the electronic component 2 After applying the adhesive resin 5, the electronic component 2 is placed on the substrate of FIG. 2A by a so-called face-down method. At that time, as shown in FIG. 2B, the terminals 20 of the electronic component 2 and the via lands 11 of the first inner layer are aligned. An alignment mark 107 is used to align the electronic component 2 and the first inner via land 11. As shown in FIG. 2C, the first inner via land 11 is, for example, a donut-shaped conductor pattern having an opening therein. FIG. 2C is a plan view of the first inner via land 11 viewed from the electronic component 2 side.
- FIG. 3A On the substrate of FIG. 2B (on the placement surface of the electronic component 2), a core material 3 having an opening, a covering material 4, and a substrate 500 on which a conductor pattern 50 is formed Is placed and thermocompression bonded.
- the substrate of FIG. 3B in which the core material 3, the covering material 4, and the substrate 500 are laminated on the substrate of FIG. 2B is obtained.
- the core material 3 and the covering material 4 before the thermocompression bonding step are semi-cured base materials. Therefore, the resin component contained in the core material 3 and the covering material 4 flows into the opening of the core material 3 in the thermocompression bonding process. Thereby, the opening of the core material 3 is filled with the filling resin 6.
- the substrate 500 is created by obtaining the same steps as the above-described method (the formation step of the conductor pattern 10) from the support base material 100 of FIG. 1A until the substrate of FIG. 1F is obtained. That is, first, a support base material (consisting of a copper foil 501 having a thickness of about 3 ⁇ m and a carrier (support plate) 502 having a thickness of about 75 ⁇ m) is prepared. Then, a dry film-like photosensitive resist is laminated on the supporting substrate. Then, a mask film on which a predetermined pattern is formed is brought into close contact with the laminated photosensitive resist, and exposure and development are performed, so that a plating resist layer in which only a portion corresponding to the conductor pattern 50 is opened is formed. Then, after washing and drying the substrate after the plating resist layer is formed, electrolytic nickel plating and electrolytic copper plating are performed, and the plating resist layer is removed to obtain the substrate 500 in which the conductor pattern 50 is formed on the protective film 505. .
- the carrier 102 and the carrier 502 are peeled (separated) from the substrate of FIG. 3B to obtain the substrate of FIG. 4A.
- the copper foil 101 and the copper foil 501 are removed from the substrate of FIG. 4A by etching to obtain the substrate of FIG. 4B.
- an alkali etchant alkali ammoniacal aqueous solution
- nickel does not dissolve, or at least the dissolution rate is significantly slower than copper. Therefore, the protective films 105 and 505 function as an etching resist, and the inner conductor patterns 10 and 50 are protected without being affected by the etching.
- via holes 108 are formed at predetermined locations on the substrate of FIG. 4B by a carbon dioxide (CO 2 ) laser, a UV-YAG laser, or the like (see FIG. 4C). Specifically, as shown in FIG. 4C, the adhesive resin 5 in the region surrounded by the first inner via land 11 is scraped off until reaching the corresponding terminal 20 by the laser or the like.
- CO 2 carbon dioxide
- UV-YAG laser UV-YAG laser
- a through hole 109 is formed in the substrate of FIG. 4C by a known drilling method using a mechanical drill or the like (see FIG. 4D).
- a process for removing smear remaining on the bottom of the via hole 108 and the inner surface of the through hole 109 is performed.
- the desmear treatment is performed using a permanganate method. Specifically, first, the substrate shown in FIG. 4D is subjected to a conditioner (resin swelling) treatment, followed by a desmear treatment solution of permanganate: 40 to 80 g / l and temperature: 50 to 80 ° C. for about 5 to 20 minutes. Immerse. It is then washed with water, dipped in a neutralized solution, washed with water and dried. As a result, smear is removed from the substrate of FIG. 4D, and a clean surface is exposed.
- a conditioner resin swelling
- the catalyst of FIG. 4D is immersed in a catalyzing solution containing a complex salt (or colloid) of tin-palladium, and a catalyst for initiating electroless copper plating is formed on both main surfaces of the substrate, the inner surfaces of the via holes 108, And adsorbed to the inner surface of the through hole 109. Then, when the substrate on which the catalyst is adsorbed is immersed in an electroless copper plating solution, electroless copper plating films are formed on both main surfaces of the substrate.
- a catalyzing solution containing a complex salt (or colloid) of tin-palladium
- a catalyst for initiating electroless copper plating is formed on both main surfaces of the substrate, the inner surfaces of the via holes 108, And adsorbed to the inner surface of the through hole 109.
- an electrolytic copper plating film is formed thereon to form a copper plating film 115 composed of the electroless copper plating film and the electrolytic copper plating film.
- the copper plating film 115 is also formed in the via hole 108 and the surface of the through hole 109 to form the via conductor 12 and the through hole conductor 80 (see FIG. 4E).
- a through-hole filler 83 made of an inorganic filler and a thermosetting resin is filled in the through-hole conductor 80, dried and cured (see FIG. 4F).
- a filling method in this case for example, a known method such as screen printing can be employed.
- a dry film-like photosensitive resist is laminated on each of the main surfaces of the substrate in FIG. 4F. Then, a mask film on which a predetermined pattern is formed is brought into close contact with each photosensitive resist, exposed to ultraviolet rays, and developed with an alkaline aqueous solution. As a result, plating resist layers 116 and 506 in which only portions corresponding to the conductor patterns 60 and 70 are opened are formed (see FIG. 4G).
- the substrate of FIG. 4G is washed with water and dried, and then electroless copper plating and electrolytic copper plating are performed.
- a copper plating layer 117 having a thickness of about 20 ⁇ m is formed in the openings of the plating resist layers 116 and 506 (see FIG. 4H).
- the plating resist layers 116 and 506 are removed, and the substrate is washed and dried to obtain the substrate shown in FIG. 4I.
- the conductive patterns 60 and 70 are formed by etching and removing the copper plating films 115 on both main surfaces of the substrate of FIG. 4I (see FIG. 4J).
- a through-hole covering film 118 covering the through-hole filler 83 is formed.
- the conductor pattern is formed by a so-called semi-additive method. In this case, an alkaline etchant is also used as the etching solution.
- the protective films 105 and 505 function as an etching resist, and the inner conductor patterns 10 and 50 are protected without being affected by the etching.
- the electronic component built-in substrate 1 shown in FIG. 5 is obtained.
- an etching solution in which nickel is dissolved and copper is not dissolved, or an etching solution having a large nickel dissolution rate / copper dissolution rate ratio is used.
- it is an etching solution of a mixed solution of perwater, nitric acid, phosphoric acid and the like.
- the first inner layer conductor pattern 10a (the portion of the first inner layer conductor pattern 10 excluding the first inner layer via land 11 and the first inner layer through-hole land 13) and the second inner layer are patterned.
- the inner-layer conductor pattern 50a (the portion of the second inner-layer conductor pattern 50 excluding the second inner-layer through-hole land 51) has a concave shape with respect to the surface of the core substrate.
- the first inner layer conductor pattern 10a does not include the alignment mark.
- the second inner layer conductor pattern 50a does not include the alignment mark.
- the electronic component built-in substrate 1 manufactured as described above has the following excellent features.
- the conductor pattern 10 electrically connected to the terminal 20 of the electronic component 2 is formed by the additive method, the conductor pattern 10 can be easily made into a fine pattern.
- the first inner conductor pattern 10a and the first inner via land 11 are finely formed, so that it is easy to incorporate electronic components having terminals with a narrow pitch.
- the via land diameter of the inner layer can be increased by making the first inner layer conductive pattern 10a fine. This facilitates the alignment between the electronic component and the inner via land, and also increases the connection reliability between the terminal of the electronic component and the inner via land.
- the protective film 105 functions as an etching resist and protects the conductor pattern 10, so that the pattern shape of the conductor pattern 10 is hardly damaged. Therefore, a fine pattern can be maintained. Further, since the shape of the first inner via land 11 and the via conductor 12 connected thereto are also protected by the protective film 105, the connection reliability with the electronic component 2 can be ensured.
- Embodiment 2 Next, a method for manufacturing the electronic component built-in substrate according to Embodiment 2 will be described with reference to FIGS. 6A to 6J.
- symbol is attached
- the substrate of FIG. 3A in the process of FIG. 3A, the substrate of FIG. A substrate 500 on which the pattern 50 was formed was laminated.
- a board electronic circuit board 2
- Stage single-sided copper-clad laminate, insulating material 602 is the same material as coating material 4).
- thermosetting resin or the thermosetting resin and the inorganic filler flow into the through hole (opening) of the core material 3 from the insulating material 602 of the core material 3 or the covering material 600.
- the opening of the core material 3 is filled with the filling resin 6.
- the carrier (support plate) 102 was peeled off. Then, only the copper foil 101 on the first surface side was removed by etching from the substrate of FIG. 6C (see FIG. 6D).
- the etching solution used is the same as the etching solution used in the process of FIG.
- the copper foil 601 on the second surface side was protected with a resist.
- FIG. 6E through holes 603 were formed in the via hole 108 and the first inner through-hole land 13 using the alignment mark 107.
- electroless copper plating and electrolytic copper plating were performed on the entire substrate to form via conductors 12 and through-hole conductors 604.
- FIG. 6G a through-hole filler 605 made of an inorganic filler and a thermosetting resin was filled into the through-hole conductor 604.
- an electroless copper plating film and an electrolytic copper plating film were formed on both main surfaces of the substrate of FIG. 6G (see FIG. 6H).
- FIG. 6I the unnecessary portion of the copper plating film was dissolved and removed to form a conductor pattern 606.
- the conductor pattern 606 is formed by a subtractive method. As in the first embodiment, the conductor pattern may be formed by a semi-additive method. At the time of forming the conductor pattern 606, a through-hole covering film 607 was formed on the through-hole filler 605 at the same time.
- the conductor pattern is not formed inside the insulating material 602 (that is, the insulating resin for incorporating the electronic component) on the second surface side.
- the insulating material 602 that is, the insulating resin for incorporating the electronic component
- Embodiment 3 Next, a method for manufacturing the electronic component built-in substrate according to Embodiment 3 will be described with reference to FIGS. 7A to 7P.
- symbol is attached
- the support base material 100 comprised from the copper foil 101 and the carrier 102 was prepared. Then, as shown in FIG. 7A, a nickel layer 701 having a thickness of about 3 ⁇ m was formed on the surface of the support base 100 (copper foil 101 side). At this time, the nickel layer 701 was formed on the entire surface of the copper foil 101. Subsequently, a plating resist was formed on the surface of the support substrate 100 (copper foil 101 side), and the plating resist was patterned by a photographic method (formation of the plating resist layer 104) (see FIG. 7B). Then, as shown in FIG. 7C, an electrolytic copper plating film (copper plating layer 106) was formed on a portion where the plating resist layer 104 was not formed. Next, as shown in FIG. 7D, the plating resist layer 104 was removed. Next, the electronic component 2 was mounted (see FIGS. 7E and 7F) in the same process as in the first embodiment (see FIGS. 2A and 2B).
- covering material 600 were laminated
- the carrier (support plate) 102 was peeled off.
- the copper foil 101 was selectively etched away using the same etching solution as in the first and second embodiments, and the unnecessary portion of the nickel layer 701 was selectively etched away. Thereby, the protective film 702 was formed (see FIG. 7J).
- etching solution at this time NP-1865 manufactured by MEC was used.
- a through hole 703 was formed in the substrate of FIG. 7J.
- the via hole 704 reaching the terminal 20 of the electronic component 2 was formed using the protective film 702 as a conformal mask (see FIG. 7K).
- the subsequent steps are the same as those in the second embodiment (FIGS. 6F to 6J).
- the conductor patterns on both main surfaces may be formed using a semi-additive method.
- FIG. 8 is an example of a build-up multilayer printed wiring board using the electronic component built-in substrate of FIG. 7P as a core substrate.
- a manufacturing process of the build-up multilayer printed wiring board of FIG. 8 will be briefly described.
- interlayer resin insulation layers 801 and 802 are formed on the first surface and the second surface of the core substrate (that is, the electronic component built-in substrate in FIG. 7P), respectively.
- openings reaching the conductor patterns 10 and 606 formed on the core substrate are provided in the interlayer resin insulating layers 801 and 802. At this time, it is also possible to form an opening reaching the through-hole covering film or the via conductor.
- conductor patterns 803 and 804 are formed on the interlayer resin insulation layers 801 and 802, respectively.
- via conductors 805 and 806 are formed in the openings of the interlayer resin insulation layers 801 and 802, respectively.
- the manufacturing method of the build-up multilayer printed wiring board has been described by taking the core substrate of Embodiment 3 as an example.
- a buildup layer is formed on the core substrate of Embodiment 1 (see FIG. 5) or the core substrate of Embodiment 2 (see FIG. 6J) to manufacture a buildup multilayer printed wiring board.
- a buildup layer is formed on the core substrate of Embodiment 1 (see FIG. 5) or the core substrate of Embodiment 2 (see FIG. 6J) to manufacture a buildup multilayer printed wiring board.
- the surface of the conductor pattern 10a on the first surface side of the core substrate is recessed with respect to the first surface of the core substrate.
- the surface of the conductor pattern 10a on the first surface side of the core substrate is located substantially on the same surface as the first surface of the core substrate. Therefore, in the manufacture of the build-up multilayer printed wiring board, the depth of the opening for forming the via conductor can be made shallower by using the core substrate of the third embodiment than the core substrates of the first and second embodiments. . As a result, it can be said that the connection reliability between the conductor pattern on the core substrate and the conductor pattern on the interlayer resin insulation layer tends to be high.
- the protective films 105 and 702 may employ titanium, tin, or the like in addition to nickel.
- the electronic component built-in substrate according to the present invention can be miniaturized and enhanced in function, and can further ensure the connection reliability of the electronic component. Therefore, application to mobile devices typified by mobile phones can be expected.
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Abstract
Description
(1)アルミニウム等の支持板の表面に、銅等からなる導体層が設けられた基材を準備し、この基材の表面(導体層側)にレーザ等を用いて複数の凹部を形成する。これらの凹部は、実装する電子部品の各端子に対応するように形成される。
(2)各端子をそれぞれ対応する各凹部に合わせるようにして、当該電子部品を基材上に配置し、接着層を介して固定する。
(3)電子部品を配置した基材上に、絶縁層と、導体層とを積層し、プレスする。
(4)プレス後の基板に貫通孔を設け、銅めっきにより、基板両主面の導体層を導通させる。
(5)サブトラクティブ法によって導体パターンを形成する。
支持板と、金属箔とからなる支持基材の前記金属箔上の少なくとも一部に、金属からなる保護膜を形成する工程と、
前記保護膜上に金属からなる導体パターンをアディティブ法により形成する工程と、
前記導体パターンが形成された基板上に、電子部品を該電子部品の回路形成面と前記導体パターンの形成面とが向かい合うように配置する工程と、
前記電子部品を絶縁性樹脂で被覆する工程と、
第1のエッチング液を用いて、前記金属箔をエッチング除去する工程と、
前記電子部品の端子と前記導体パターンの一部とを電気的に接続する工程と、を有し、
前記保護膜は、前記第1のエッチング液に対して、溶解しない、あるいは、前記金属箔に比べてエッチング速度が遅い、ことを特徴とする。
前記保護膜が、ニッケル、チタン、錫の内の一種以上の金属からなることが好ましい。
前記導体パターンは、前記第2のエッチング液に対して、溶解しない、あるいは、前記保護膜に比べてエッチング速度が遅いようにすることが好ましい。
2 電子部品
3 コア材
4 被覆材
5 接着樹脂
6 充填樹脂
10、50、60、70 導体パターン
11 第1の内層のビアランド
12 ビア導体
13 第1の内層のスルーホールランド
20 端子
51 第2の内層のスルーホールランド
61 第1の外層のビアランド
80 スルーホール導体
81 第1の外層のスルーホールランド
82 第2の外層のスルーホールランド
105、505 保護膜
図5は、実施形態1の製造方法により製造された電子部品内蔵基板1の概略断面図である。この電子部品内蔵基板1は、例えば、多層プリント配線板のコア基板等として使用される。
被覆材4は、コア材3と同様に、ガラス繊維で強化された樹脂基材であってもよいし、無機フィラーと熱硬化性樹脂からなる樹脂基材であってもよい。無機フィラーの量は30wt%から90wt%であるのが好ましい。被覆材4の厚さは、約50μmである。
また、コア材3、被覆材4は、ガラス繊維で強化された基材であって、さらに、無機フィラーを30~60wt%含んでいても良い。
また、第2の内層のスルーホールランド51と第2の外層のスルーホールランド82との間には、保護膜505が介在している。
先ず、図1Aに示す支持基材100を準備する。支持基材100は、厚さ約3μmの銅箔101と、厚さ約75μmのキャリア102とから構成される。キャリア(支持板)102は、銅からなり、図示しない接着層(剥離層)を介して、銅箔101と剥離(分離)可能に接着している。
そして、ラミネートした感光性レジスト103に、所定のパターンが形成されたマスクフィルムを密着させ、紫外線で露光し、アルカリ水溶液で現像する。
その結果、導体パターン10に相当する部分のみが開口しためっきレジスト層104が形成される(図1C参照)。
それから、さらに電解銅めっきを行い、保護膜105上に、厚さ約20μmの銅めっき層106を形成する(図1E参照)。
そして、めっきレジスト層104を除去し、水洗乾燥すると、導体パターン10が形成された図1Fの基板が得られる。
また、第1の内層のビアランド11も導体パターン10と同時に形成される。
アディテブ法はフルアディティブ法とセミアディティブ法を含む。両者の工程は、周知(例えば、プリント配線技術読本 発行所:日刊工業新聞社 参照)なので、詳しい説明は省略する。
続いて、図1Fの基板の導体パターン10上に接着樹脂5を塗布する(図2A参照)。接着樹脂5は、上述したように、例えば、シリカやアルミナ等の無機フィラーを含む絶縁性樹脂である。ここで、フィラーとは、最長長/最短長のアスペクト比が1~1.2である分散材をいう。接着樹脂5は、少なくとも第1の内層のビアランド11を覆うよう、所定領域に塗布される。この塗布領域は、電子部品2の回路形成面の面積より広い範囲であるのが好ましい。
第1の内層のビアランド11は、図2Cに示すように、内部に開口部を有する、例えば、ドーナツ状の導体パターンである。図2Cは、第1の内層のビアランド11を電子部品2側から見た平面図である。
続いて、図3Aに示すように、図2Bの基板上(電子部品2の配置面上)に、開口部を有するコア材3と、被覆材4と、導体パターン50が形成された基板500とを載置し、加熱圧着する。
これにより、図2Bの基板に、コア材3と、被覆材4と、基板500とが積層された図3Bの基板が得られる。
ここで、加熱圧着工程前のコア材3と被覆材4は半硬化状態の基材である。したがって、加熱圧着工程で、コア材3と被覆材4に含まれる樹脂成分がコア材3の開口部に流出する。これにより、コア材3の開口部は充填樹脂6で充填される。
即ち、先ず、支持基材100と同様の構成の支持基材(厚さ約3μmの銅箔501と、厚さ約75μmのキャリア(支持板)502とから構成される。)を準備する。そして、かかる支持基材上にドライフィルム状の感光性レジストをラミネートする。それから、ラミネートした感光性レジストに所定のパターンが形成されたマスクフィルムを密着させ、露光・現像することで、導体パターン50に相当する部分のみが開口しためっきレジスト層が形成される。
そして、めっきレジスト層形成後の基板を水洗乾燥した後、電解ニッケルめっきと、電解銅めっきを行い、めっきレジスト層を除去すると、保護膜505上に導体パターン50が形成された基板500が得られる。
続いて、図3Bの基板からキャリア102と、キャリア502とを剥離(分離)し、図4Aの基板を得る。
そして、図4Aの基板から銅箔101と、銅箔501とをエッチングにより除去し、図4Bの基板を得る。
本実施形態では、この際のエッチング液(エッチャント)としてアルカリエッチャント(アルカリアンモニア性の水溶液)を使用する。かかるアルカリエッチャントでは、ニッケルは溶けない、あるいは、少なくとも銅より溶解速度が著しく遅くなる。したがって、保護膜105、505がエッチングレジストとして機能し、内層の導体パターン10、50は、エッチングの影響を受けず保護されることになる。
そして、この触媒が吸着した基板を無電解銅めっき液に浸せきすると、基板の両主面に無電解銅めっき膜が形成される。続いて、形成された無電解銅めっき膜をシード層として、この上に電解銅めっき膜を形成し、無電解銅めっき膜と電解銅めっき膜とからなる銅めっき膜115を形成する。この時、同時に、ビアホール108内や貫通孔109の表面にも銅めっき膜115が形成され、ビア導体12、スルーホール導体80が形成される(図4E参照)。
その結果、導体パターン60、70に相当する部分のみが開口しためっきレジスト層116、506が形成される(図4G参照)。
それから、めっきレジスト層116、506を除去し、水洗乾燥することで、図4Iの基板が得られる。
導体パターンは、所謂、セミアディティブ法で形成されている。この際のエッチング液も上記同様、アルカリエッチャントを使用する。これにより、保護膜105、505がエッチングレジストとして機能し、内層の導体パターン10、50は、エッチングの影響を受けず保護される。
続いて、実施形態2に係る電子部品内蔵基板の製造方法について、図6A~図6Jを用いて説明する。なお、実施形態1と共通する部分については、同一符号を付し、説明を省略する。
実施形態1では、図3Aの工程において、電子部品2を搭載した図2Bの基板と、コア材3(B-stageの基材)と、被覆材4(B-stageの基材)と、導体パターン50が形成された基板500とを積層した。
その代わり、実施形態2では、図6Aに示すように、電子部品2を搭載した基板(図2Bの基板)と、コア材3と被覆材600(銅箔601と絶縁材602とからなるB-stageの片面銅張積層板。絶縁材602は、被覆材4と同様の材質である。)を積層した。
そして、図6Cの基板から、第1面側の銅箔101のみをエッチング除去した(図6D参照)。使用したエッチング液は実施形態1の図4Bの工程で用いたエッチング液と同様である。なお、第2面側の銅箔601はレジストで保護した。
そして、図6Fに示すように、基板全体に無電解銅めっき、電解銅めっきを行って、ビア導体12、スルーホール導体604を形成した。
次に、図6Gに示すように、スルーホール導体604の内部に無機フィラーと熱硬化性樹脂とからなるスルーホール充填材605を充填した。
そして、図6Gの基板の両主面上に、無電解銅めっき膜と電解銅めっき膜を形成した(図6H参照)。
次に、図6Iに示すように、不要部分の銅めっき膜を溶解除去して導体パターン606を形成した。本実施形態では、サブトラクティブ法により、導体パターン606を形成した。なお、実施形態1と同様に、セミアディティブ法により導体パターンを形成してもよい。
導体パターン606の形成の際、同時に、スルーホール充填材605上にスルーホールカバーリング膜607を形成した。
続いて、実施形態3に係る電子部品内蔵基板の製造方法について、図7A~図7Pを用いて説明する。なお、実施形態1、2と共通する部分については、同一符号を付し、説明を省略する。
続いて、この支持基材100の表面(銅箔101側)にめっきレジストを形成し、写真法により、めっきレジストをパターン化した(めっきレジスト層104の形成)(図7B参照)。
そして、図7Cに示すように、めっきレジスト層104の非形成部分に、電解銅めっき膜(銅めっき層106)を形成した。
次に、図7Dに示すように、めっきレジスト層104を除去した。
次に、実施形態1と同様の工程で(図2A、図2B参照)、電子部品2を実装した(図7E、図7F参照)。
次に、図7Iに示すように、キャリア(支持板)102を剥離した。
次に、実施形態1、2と同様のエッチング液を用いて、銅箔101を選択的にエッチング除去し、そして、不要部分のニッケル層701を選択的にエッチング除去した。これにより、保護膜702が形成された(図7J参照)。この際のエッチング液は、メック社製のNP-1865を用いた。
以降の工程(図7Lから図7P)は、実施形態2と同様(図6Fから図6J)である。
なお、図7Pの電子部品内蔵基板において、両主面上の導体パターンは、セミアディティブ法を使用して、形成されてもよい。
先ず、コア基板(即ち、図7Pの電子部品内蔵基板)の第1面及び第2面上に、それぞれ層間樹脂絶縁層801及び802を形成する。その後、コア基板に形成されている導体パターン10、606に到達する開口部を層間樹脂絶縁層801、802に設ける。この時、スルーホールカバーリング膜やビア導体に到達する開口部を形成することも可能である。続いて、層間樹脂絶縁層801及び802上に、それぞれ導体パターン803及び804を形成する。その際、同時に層間樹脂絶縁層801及び802の開口部に、それぞれビア導体805及び806を形成する。これにより、導体パターン10と導体パターン803が接続し、導体パターン606と導体パターン804が接続する。
Claims (10)
- 支持板と、金属箔とからなる支持基材の前記金属箔上の少なくとも一部に、金属からなる保護膜を形成する工程と、
前記保護膜上に金属からなる導体パターンをアディティブ法により形成する工程と、
前記導体パターンが形成された基板上に、電子部品を該電子部品の回路形成面と前記導体パターンの形成面とが向かい合うように配置する工程と、
前記電子部品を絶縁性樹脂で被覆する工程と、
第1のエッチング液を用いて、前記金属箔をエッチング除去する工程と、
前記電子部品の端子と前記導体パターンの一部とを電気的に接続する工程と、を有し、
前記保護膜は、前記第1のエッチング液に対して、溶解しない、あるいは、前記金属箔に比べてエッチング速度が遅い、
ことを特徴とする電子部品内蔵基板の製造方法。 - 前記金属箔及び前記導体パターンが銅からなり、
前記保護膜が、ニッケル、チタン、錫の内の一種以上の金属からなる、
ことを特徴とする請求項1に記載の電子部品内蔵基板の製造方法。 - 前記第1のエッチング液がアルカリエッチャントである、
ことを特徴とする請求項2に記載の電子部品内蔵基板の製造方法。 - 前記電子部品の配置前に、前記導体パターン形成面上に接着樹脂を形成する工程をさらに有し、
前記電子部品と前記基板は、前記接着樹脂を介して接着されている、
ことを特徴とする請求項1に記載の電子部品内蔵基板の製造方法。 - 前記接着樹脂には、無機フィラーが含まれる、
ことを特徴とする請求項4に記載の電子部品内蔵基板の製造方法。 - 前記導体パターンには、前記電子部品を配置する際の位置決めのためのマークが含まれる、
ことを特徴とする請求項1に記載の電子部品内蔵基板の製造方法。 - 前記保護膜は、形成する前記導体パターンのパターン形状に合致するようにして形成される、
ことを特徴とする請求項1に記載の電子部品内蔵基板の製造方法。 - 前記保護膜は、前記金属箔上の全面に形成される、
ことを特徴とする請求項1に記載の電子部品内蔵基板の製造方法。 - 第2のエッチング液を用いて、不要な部分の前記保護膜をエッチング除去する工程をさらに有し、
前記導体パターンは、前記第2のエッチング液に対して、溶解しない、あるいは、前記保護膜に比べてエッチング速度が遅い、
ことを特徴とする請求項8に記載の電子部品内蔵基板の製造方法。 - 前記接着樹脂の形成領域は、前記電子部品の回路形成面の面積より広い範囲である、
ことを特徴とする請求項4に記載の電子部品内蔵基板の製造方法。
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JP2009553332A JPWO2009101723A1 (ja) | 2008-02-11 | 2008-09-25 | 電子部品内蔵基板の製造方法 |
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US (1) | US8225503B2 (ja) |
JP (1) | JPWO2009101723A1 (ja) |
KR (1) | KR101085288B1 (ja) |
CN (1) | CN101946568B (ja) |
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WO (1) | WO2009101723A1 (ja) |
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Also Published As
Publication number | Publication date |
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CN101946568B (zh) | 2012-07-25 |
US8225503B2 (en) | 2012-07-24 |
JPWO2009101723A1 (ja) | 2011-06-02 |
US20090199399A1 (en) | 2009-08-13 |
CN101946568A (zh) | 2011-01-12 |
KR20100102229A (ko) | 2010-09-20 |
KR101085288B1 (ko) | 2011-11-22 |
TWI373287B (en) | 2012-09-21 |
TW200935992A (en) | 2009-08-16 |
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