WO2010038489A1 - 電子部品内蔵配線板及びその製造方法 - Google Patents
電子部品内蔵配線板及びその製造方法 Download PDFInfo
- Publication number
- WO2010038489A1 WO2010038489A1 PCT/JP2009/054958 JP2009054958W WO2010038489A1 WO 2010038489 A1 WO2010038489 A1 WO 2010038489A1 JP 2009054958 W JP2009054958 W JP 2009054958W WO 2010038489 A1 WO2010038489 A1 WO 2010038489A1
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- Prior art keywords
- electronic component
- conductor pattern
- wiring board
- built
- hole
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/01—Tools for processing; Objects used during processing
- H05K2203/0147—Carriers and holders
- H05K2203/0156—Temporary polymeric carrier or foil, e.g. for processing or transferring
-
- 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
- H05K2203/01—Tools for processing; Objects used during processing
- H05K2203/0191—Using tape or non-metallic foil in a process, e.g. during filling of a hole with conductive paste
-
- 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
- H05K2203/04—Soldering or other types of metallurgic bonding
- H05K2203/049—Wire bonding
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/14—Related to the order of processing steps
- H05K2203/1461—Applying or finishing the circuit pattern after another process, e.g. after filling of vias with conductive paste, after making printed resistors
- H05K2203/1469—Circuit made after mounting or encapsulation of the components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4602—Manufacturing multilayer circuits characterized by a special circuit board as base or central core whereon additional circuit layers are built or additional circuit boards are laminated
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to an electronic component built-in wiring board in which an electronic component such as a semiconductor element is accommodated.
- Patent Document 1 For example, in Patent Document 1, (a) a step of attaching a sheet such as a UV tape to the bottom of a through hole formed in the core substrate, (b) a semiconductor element such as an IC chip on the sheet, and a terminal to which the sheet is bonded A step of placing the substrate in contact with the surface, (c) a step of filling the resin in the through hole, (d) a step of curing the filled resin, (e) a step of peeling the sheet, (f) an upper surface of the semiconductor element.
- a method of manufacturing a multilayer printed wiring board having a step of forming a buildup layer is disclosed.
- the terminals of the semiconductor element and the wiring of the build-up layer can be appropriately electrically connected, and a highly reliable multilayer printed wiring board with a built-in semiconductor element can be manufactured.
- a sheet such as a UV tape needs to be affixed substantially horizontally to the bottom of the core substrate.
- burrs or the like generated when the through holes are formed in the core substrate hinder horizontal sticking.
- it is necessary to form a conductor pattern on both main surfaces of the core substrate When a sheet is attached in such a case, the conductor pattern portion and the vicinity of the through hole end are formed. As shown in FIG. 13A, there is a possibility that the sheet may be distorted due to the level difference generated therebetween.
- the filled resin may enter the gap between the core substrate and the sheet.
- the present invention has been made in view of the above-described conventional problems, and the electronic component built-in wiring board and the core substrate that are excellent in quality such as connection reliability are provided by accurately arranging the electronic component in the core substrate. It is an object of the present invention to provide a manufacturing method that facilitates accurate placement of electronic components on a substrate.
- the electronic component built-in wiring board according to the present invention, A core substrate; Electronic components housed in through holes provided in the core substrate; A first conductor pattern formed on at least one main surface of the core substrate; A second conductor pattern formed on the same surface as the surface on which the first conductor pattern is formed; One or more interlayer insulation layers and conductor pattern layers formed on the core substrate, The second conductor pattern is formed on at least a part of the periphery of the end face of the through hole.
- the terminal of the electronic component may be electrically connected to the conductor pattern layer formed on the interlayer insulating layer via a via conductor provided in any of the interlayer insulating layers.
- the terminal of the electronic component may be electrically connected to the conductor pattern layer formed on any one of the interlayer insulating layers via a conductor bump or a conductive adhesive layer.
- the pad of the electronic component is formed on one of the main surfaces of the core substrate via another conductor pattern and a wire different from the first conductor pattern and the second conductor pattern. It may be electrically connected.
- the second conductor pattern may be formed in a portion of the periphery of the end face of the through hole that faces through the through hole.
- the second conductor pattern may be formed in a frame shape on the periphery of the end face of the through hole.
- the second conductor pattern may be continuously formed in a frame shape on the periphery of the end face of the through hole.
- the second conductor pattern may be formed to include a discontinuous portion in a frame shape on the periphery of the end face of the through hole.
- the side surface of the second conductor pattern may be substantially flush with the inner wall surface provided with the through hole of the core substrate.
- a part of the second conductor pattern may protrude into the through hole.
- the second conductor pattern may be formed at a predetermined distance from the contour of the end face of the through hole.
- the maximum width of the second conductor pattern may be larger than the maximum width of the first conductor pattern.
- the thickness of the second conductor pattern is substantially the same as the thickness of the first conductor pattern.
- a resin material is filled in a gap between the electronic component and the inner wall of the core substrate in the through hole.
- the electronic component is accommodated in the through hole so that a circuit non-formation surface of the electronic component faces a formation surface of the second conductor pattern on the core substrate.
- the second conductor pattern may be formed on both main surfaces of the core substrate.
- the manufacturing method of the electronic component built-in wiring board Providing a through hole for accommodating an electronic component in the core substrate; Forming a first conductor pattern and a second conductor pattern on the same main surface of at least one of the core substrates; A step of attaching an adhesive tape to the formation surface of the first conductor pattern and the second conductor pattern in the core substrate; Placing the electronic component on the adhesive surface of the adhesive tape at the bottom of the through hole; Filling a resin material in a gap between the placed electronic component and the inner wall of the core substrate, and fixing the electronic component; After fixing the electronic component, having the step of peeling the adhesive tape, The second conductor pattern is formed on at least a part of a peripheral edge of the end face of the through hole.
- the method may further include forming a via conductor that electrically connects the terminal of the electronic component and the conductor pattern layer in the insulating layer.
- the second conductor pattern may be formed in a portion of the periphery of the end face of the through hole that faces through the through hole.
- the second conductor pattern may be formed in a frame shape on the periphery of the end face of the through hole.
- the second conductor pattern may be continuously formed in a frame shape on the peripheral edge of the through hole.
- the second conductor pattern may be formed on the periphery of the end face of the through hole so as to include a discontinuous portion in a frame shape.
- the second conductor pattern may be formed such that its side surface is substantially flush with the inner wall surface of the core substrate in which the through hole is provided.
- the second conductor pattern may be formed so that a part of the second conductor pattern protrudes into the through hole.
- the second conductor pattern may be formed a predetermined distance away from the contour of the end face of the through hole.
- the maximum width of the second conductor pattern may be larger than the maximum width of the first conductor pattern.
- the adhesive tape is a UV tape whose adhesiveness is reduced by irradiation with ultraviolet rays.
- the thickness of the second conductor pattern is preferably substantially the same as the thickness of the first conductor pattern.
- FIG. 5 is a schematic cross-sectional view of the electronic component built-in wiring board 1 manufactured by the manufacturing method of the first embodiment.
- the electronic component built-in wiring board 1 includes a core substrate 2, an electronic component 3 accommodated (inner layer) in the core substrate 2, conductor patterns 4 and 5 formed on both main surfaces of the core substrate 2, and interlayer insulation. Layers 6 and 7, conductor patterns 8 and 9 formed on interlayer insulating layers 6 and 7, respectively, and conductor pattern 10 formed on one main surface of core substrate 2.
- the core substrate 2 is a substrate obtained by impregnating a reinforcing material (base material) with a resin, and the thickness thereof is about 110 ⁇ m.
- a reinforcing material base material
- the thickness thereof is about 110 ⁇ m.
- the reinforcing material glass cloth (glass cloth), glass nonwoven fabric, aramid nonwoven fabric and the like can be suitably employed.
- any insulating material having the same strength as these can be used.
- epoxy resin epoxy resin, BT (bismaleimide triazine) resin, polyimide resin, etc. can be adopted.
- the conductor patterns 4 and 5 are made of copper or the like, and the thickness thereof is about 20 ⁇ m.
- the conductor pattern 4 is formed on one main surface (hereinafter referred to as a first surface) of the core substrate 2, and the conductor pattern 5 is on the other main surface (hereinafter referred to as a second surface) of the core substrate 2. Is formed.
- the conductor pattern 4 and the conductor pattern 5 are electrically connected through the through-hole conductor 20.
- the electronic component 3 is an IC chip and is accommodated in the through hole 21 of the core substrate 2 by a so-called face-up method.
- the interlayer insulating layers 6 and 7 are plate materials obtained by impregnating a reinforcing material such as glass fiber or aramid fiber with a resin such as an epoxy resin, a polyester resin, a polyimide resin, a BT resin, or a phenol resin. Is also composed of prepreg.
- the interlayer insulating layer 6 is formed on the first surface side of the core substrate 2 and the interlayer insulating layer 7 is formed on the second surface side, and the thickness thereof is about 60 ⁇ m.
- the conductor patterns 8 and 9 are made of copper or the like, and the thickness thereof is about 20 ⁇ m.
- the conductor pattern 8 is formed on the interlayer insulating layer 6 and is electrically connected to the conductor pattern 4 and the terminal 30 of the electronic component 3 via the via conductor 60.
- the conductor pattern 9 is formed on the interlayer insulating layer 7 and is electrically connected to the conductor pattern 9 via the via conductor 70.
- the conductor pattern 10 is formed on the second surface side of the core substrate 2, similarly to the conductor pattern 5.
- the conductor pattern 10 is made of copper or the like and has a thickness of about 20 ⁇ m. Although the details will be described later, the conductor pattern 10 is used for accurately arranging the electronic component 3 and is not electrically connected to other conductor patterns.
- a copper-clad laminate in which copper foils 101 and 102 having a thickness of about 12 ⁇ m are laminated on both main surfaces of a core substrate 2 having a thickness of about 110 ⁇ m is prepared.
- through holes 103 are formed in the copper-clad laminate of FIG. 1A by a known drilling method using a drill or the like (see FIG. 1B).
- the through hole 103 may be formed by a carbon dioxide (CO 2 ) laser, an Nd—YAG laser, an excimer laser, or the like.
- a treatment for removing smear remaining on the inner surface of the through-hole 103 is performed, and then the copper-clad laminate of FIG. 1B is subjected to electroless copper plating and electrolytic copper plating. Then, as shown in FIG. 1C, copper plating films 104 and 105 are formed on both main surfaces of the copper-clad laminate of FIG. 1B, and through-hole conductors 20 are formed.
- the conductor pattern 10a is a prototype of the conductor pattern 10 (before drilling), and is formed to be larger than the area of the mounting surface (that is, the circuit non-forming surface) of the electronic component 3 as shown in FIG. 4A.
- the formation area of the conductor pattern 10a is equal to the area when the contour of the circuit non-formation surface (rectangular shape) of the electronic component 3 is expanded by a predetermined length L (about 50 ⁇ m).
- the through-hole 21 for accommodating the electronic component 3 is formed by a known drilling method using a drill or the like (see FIG. 1E).
- the through holes 21 may be formed by a carbon dioxide (CO 2 ) laser, an Nd—YAG laser, an excimer laser, or the like.
- the conductor pattern 10 is formed by this drilling. 4B, the conductor pattern 10 is formed in a frame shape on the second surface of the core substrate 2 so as to surround the end surface on the second surface side of the through hole 21 without any gap.
- the frame width of the through hole 21 is about 8.1 mm.
- the conductor pattern 10 may be formed in advance before the through hole 21 is formed. In this case, the conductor pattern 10 is also formed in the process of forming the conductor patterns 4 and 5.
- the tape 201 is attached to the second surface side of the substrate of FIG. 1E (see FIG. 2A).
- UV tape for example, Adwill D series of Lintec Co., Ltd.
- the tape 201 is affixed substantially horizontally without distortion by the presence of the conductor pattern 10 having the same thickness as the conductor pattern 5 and formed so as to surround the end surface on the second surface side of the through hole 21. Becomes easy.
- the electronic component 3 is placed on the adhesive (adhesive) surface of the tape 201 by a so-called face-up method (see FIG. 2B).
- the electronic component 3 can also be accurately arranged without being displaced in the vertical direction.
- a film-shaped resin material (prepreg in the present embodiment) having a thickness of about 60 ⁇ m is laminated on the first surface of the substrate of FIG. 2B by a vacuum lamination method.
- an interlayer insulating layer 6 is formed as shown in FIG. 3A.
- the resin material flows into the through-hole conductor 20 and also flows into the gap between the electronic component 3 and the inner wall of the core substrate 2 in the through hole 21. Thereby, the gap between the electronic component 3 and the inner wall of the core substrate 2 is filled with the resin material.
- the conductor pattern 10 surrounds the end surface on the second surface side of the through hole 21 without a gap, and is in close contact with the tape 201. For this reason, the resin material that has flowed into the gap between the electronic component 3 and the inner wall of the core substrate 2 does not flow out onto the second surface of the core substrate 2 with the conductor pattern 10 serving as a wall.
- a film-like resin material (prepreg in the present embodiment) having a thickness of about 60 ⁇ m is laminated on the second surface of the substrate of FIG. 3B by a vacuum lamination method. Thereby, as shown in FIG. 3C, the interlayer insulating layer 7 is formed. During the lamination, the resin material flows into the through-hole conductor 20 so that the inside of the through-hole conductor 20 is filled with the resin material.
- the electronic component 3 can be accommodated in a face-down manner.
- via holes are formed at predetermined locations on the substrate of FIG. 3C using a carbon dioxide (CO 2 ) laser, UV-YAG laser, or the like, and conductor patterns 8 and 9 and via conductors 60 and 70 are formed by an additive method.
- CO 2 carbon dioxide
- UV-YAG laser UV-YAG laser
- the conductor pattern 10 having the same thickness as the conductor pattern 5 is formed on the second surface of the core substrate 2, and the end surface on the second surface side of the through hole 21 is provided. It is formed in a frame shape so as to surround it. For this reason, it becomes easy to stick the tape 201 substantially horizontally without distortion.
- the electronic component 3 can be placed at a predetermined position inside the through hole 21 in a substantially horizontal manner by the tape 201 attached substantially horizontally. Thereby, the flatness of the interlayer insulating layer 6 can be ensured. As a result, the conductor pattern 8 can be finely formed on the interlayer insulating layer 6, and the via conductor 60 can be formed with high accuracy. Therefore, the connection reliability between the terminal 30 of the electronic component 3 and the via conductor 60 is improved.
- the conductor pattern 10 surrounds the end surface of the through hole 21 on the second surface side without a gap so as to create a wall, so that the resin material does not flow out onto the second surface of the core substrate 2 during lamination. . For this reason, the flatness of the upper surface (circuit formation surface) of the accommodated electronic component 3 can be further ensured.
- FIG. 6 is an example of a build-up multilayer printed wiring board obtained by further multilayering the electronic component built-in wiring board 1 of FIG. The manufacturing process of this build-up multilayer printed wiring board will be briefly described below.
- interlayer insulating layers 601 and 602 are formed on the first surface and the second surface of the electronic component built-in wiring board 1, respectively. Thereafter, openings reaching the conductor patterns 8 and 9 formed in the electronic component built-in wiring board 1 are provided in the interlayer insulating layers 601 and 602.
- conductor patterns 603 and 604 are formed on the interlayer insulating layers 601 and 602, respectively.
- via conductors 605 and 606 are formed in the openings of the interlayer insulating layers 601 and 602, respectively.
- interlayer insulating layers 607 and 608, conductor patterns 609 and 610, and via conductors 611 and 612 are formed.
- solder resist a liquid or dry film photosensitive resist (solder resist) is applied or laminated on both main surfaces of the substrate. Then, a mask film on which a predetermined pattern is formed is brought into close contact with the surface of the photosensitive resist, exposed to ultraviolet rays, and developed with an alkaline aqueous solution. As a result, the solder resist layers 613 and 614 provided with openings for exposing the portions to be the solder pads of the conductor patterns 609 and 610 are formed, and the build-up multilayer printed wiring board of FIG. 6 is obtained.
- the conductor pattern 10 is formed to be substantially flush with the contour of the end surface on the second surface side of the through hole 21 as shown in FIG. 4B, but is not limited thereto.
- the conductor pattern 10 is filled with a resin material up to the wall.
- the distance from the contour in this case is preferably shorter than the line width (that is, the frame width) of the conductor pattern 10.
- the conductor pattern 10 may be formed so as to slightly protrude inside the through hole 21 as shown in FIG. 9B. In order to form the conductor pattern 10 in this manner, a slightly complicated process is required as compared with the above embodiment, but the substantially horizontal application of the tape 201 is further facilitated.
- the outline of the end face of the through hole 21 is rectangular, and the outline of the conductor pattern 10 is also rectangular.
- both the end face shape of the through hole 21 and the shape of the conductor pattern 10 are both.
- the present invention is not limited to the above embodiment.
- the outline of the end face of the through hole 21 and the outline of the conductor pattern 10 may be elliptical.
- the shape of the conductor pattern 10 may not be the same shape as the contour of the end face of the through hole 21 (see FIG. 9D). Furthermore, the line width of the conductor pattern 10 may not be uniform (see FIG. 9E).
- the conductor pattern 10 is formed so that the end surface of the through-hole 21 may be surrounded without a space
- a part of the resin material that has flowed into the gap between the electronic component 3 and the inner wall of the core substrate 2 during the formation of the interlayer insulating layer 6 causes the wall of the conductor pattern 10 to There is a risk that it may flow out onto the second surface of the core substrate 2.
- the effect that the tape 201 can be easily applied substantially horizontally remains unchanged.
- the gap between the conductor patterns 10 is filled with the resin material, an effect of improving the adhesion between the core substrate 2 and the interlayer insulating layer 6 is produced. Therefore, it can be said that the conventional problems can be sufficiently solved.
- the conductor pattern 10 is not necessarily formed so as to surround the end face of the through hole 21.
- the conductor pattern 10 may be formed in a manner as shown in FIGS. 9G to 9I.
- the conductor pattern 10 only needs to be formed so that the tape 201 can be easily applied substantially horizontally.
- the conductor pattern 10 may be formed not only on one main surface of the core substrate 2 but also on both main surfaces.
- the conductor pattern 10 is formed on both main surfaces of the core substrate 2, and the copper plating film 700 that connects both is formed on the side surface of the through hole 21.
- the conductor pattern 10 and the copper plating film 700 are formed as shown in FIG. 9J, in addition to the effects described above, a shielding effect can also be achieved.
- the conductor pattern 10 has been described as being not electrically connected to another conductor pattern (that is, a dummy conductor pattern). However, it goes without saying that the conductor pattern 10 is electrically connected to other conductor patterns and functions as an electric circuit. Alternatively, the second conductor pattern may be used as a power supply conductor or a ground conductor.
- the electronic component 3 accommodated in the core substrate 2 is not limited to a semiconductor element such as an IC chip.
- the capacitor can be accommodated in the core substrate 2 by the same procedure (FIGS. 2B to 3B) as in the above embodiment.
- the gap between the electronic component 3 and the inner wall of the core substrate 2 is filled with the resin material constituting the interlayer insulating layer 6.
- the electronic component 3 may be fixed by other methods. For example, before forming the interlayer insulating layer 6 (that is, before laminating the resin material), an insulating resin (for example, made of a thermosetting resin and an inorganic filler) is applied between the electronic component 3 and the inner wall of the core substrate 2. The electronic component 3 may be fixed by filling the gap.
- the terminal 30 of the electronic component 3 is connected with the conductor pattern 8 on the interlayer insulation layer 6 via the via conductor 60
- the electronic component 3 may be mounted by wire bonding connection.
- the electronic component 3 is placed on the adhesion (adhesion) surface of the tape 201 of the substrate of FIG.
- the electronic component 3 is provided with pads (not shown) on the upper surface (circuit formation surface) instead of the connection terminals. Then, as shown in FIG.
- the pads of the electronic component 3 and the pads on the core substrate 2 are connected by wires 111 (gold or aluminum thin wires).
- wires 111 gold or aluminum thin wires.
- the present invention can also be applied when the electronic component 3 is flip-chip mounted.
- the base material 120 is laminated instead of the tape 201 on the second surface side of the substrate of FIG. 1E.
- the base material 120 includes an insulating material 121 such as a prepreg, a pad 122 formed on the insulating material 121, and a solder bump 123 formed on the pad 122.
- the electronic component 3 is mounted in a face-down manner. That is, the electronic component 3 provided with the bump 31 is placed in the through hole 21 of the substrate of FIG. 12A with the circuit forming surface facing down, and is placed on the base material 120, and the bump 31 of the electronic component 3 and the solder bump 123 is joined.
- the underfill material 124 is filled into the gaps of the through holes 21 of the core substrate 2.
- the underfill material 124 is, for example, an insulating resin containing an inorganic filler such as silica or alumina.
- the underfill material 124 secures the fixing strength of the electronic component 3, and the thermal expansion coefficient gap between the electronic component 3 and the core substrate 2. It plays a role in absorbing the generated distortion.
- the electronic component 3 can be placed at a predetermined position inside the through hole 21 in a substantially horizontal manner.
- the conductive adhesive layer (not shown) formed on the pad 122 and the bumps 31 of the electronic component 3 may be electrically connected.
- the conductive adhesive layer is made of, for example, tin plating, solder plating, or alloy plating such as tin-silver-copper plating.
- the technology according to the present invention can be widely applied to wiring boards that house electronic components therein.
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Abstract
Description
コア基板と、
該コア基板に設けられた通孔に収容される電子部品と、
前記コア基板の少なくとも何れか一方の主面上に形成される第1の導体パターンと、
該第1の導体パターンの形成面と同一面上に形成される第2の導体パターンと、
前記コア基板上に形成される1又は複数の層間絶縁層及び導体パターン層と、を備え、
前記第2の導体パターンは、前記通孔の端面の周縁の少なくとも一部に形成されている、ことを特徴とする。
コア基板に電子部品を収容するための通孔を設ける工程と、
前記コア基板の少なくとも何れか一方の同一主面上に、第1の導体パターン及び第2の導体パターンを形成する工程と、
前記コア基板における前記第1の導体パターン及び前記第2の導体パターンの形成面に、粘着テープを貼り付ける工程と、
前記電子部品を前記通孔の底部における前記粘着テープの粘着面上に載置する工程と、
載置した前記電子部品と前記コア基板の内壁との隙間に樹脂材料を充填し、前記電子部品を固定する工程と、
前記電子部品の固定後、前記粘着テープを剥離する工程と、を有し、
前記第2の導体パターンは、前記通孔の端面の周縁の少なくとも一部に形成される、ことを特徴とする。
前記絶縁層に、前記電子部品の端子と前記導体パターン層とを電気的に接続するビア導体を形成する工程と、をさらに有してもよい。
2 コア基板
3 電子部品
4、5、8~10 導体パターン
6、7 層間絶縁層
20 スルーホール導体
21 通孔
30 端子
60、70 ビア導体
その結果、導体パターン609,610のはんだパッドとなる部分を露出させるための開口部が設けられたソルダーレジスト層613,614が形成され、図6のビルドアップ多層プリント配線板が得られる。
この場合の工程では、図11Aに示すように、図2Aの基板のテープ201の接着(粘着)面上に、フェースアップ方式で電子部品3を載置する。この電子部品3には、その上面(回路形成面)に、接続端子の代わりに、図示しないパッドが設けられている。
そして、図11Bに示すように、電子部品3のパッドとコア基板2上のパッド(ここでは、導体パターン4の一部)とを、ワイヤ111(金やアルミニウムの細線)で接続する。
この場合も上記実施形態と同様、電子部品3の上面(回路形成面)の平坦性が確保されているため、ワイヤボンディング接続の精度が向上する。
尚、パッド122上に形成した導電性接着層(図示せず)と電子部品3のバンプ31とを電気的に接続させるようにしてもよい。導電性接着層は、例えば、錫めっき、半田めっき、若しくは、錫-銀-銅めっきなどの合金めっきで構成される。
Claims (28)
- コア基板と、
該コア基板に設けられた通孔に収容される電子部品と、
前記コア基板の少なくとも何れか一方の主面上に形成される第1の導体パターンと、
該第1の導体パターンの形成面と同一面上に形成される第2の導体パターンと、
前記コア基板上に形成される1又は複数の層間絶縁層及び導体パターン層と、を備え、
前記第2の導体パターンは、前記通孔の端面の周縁の少なくとも一部に形成されている、
ことを特徴とする電子部品内蔵配線板。 - 前記電子部品の端子が、何れかの前記層間絶縁層に設けられたビア導体を介して、当該前記層間絶縁層上に形成された前記導体パターン層と電気的に接続されている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記電子部品の端子が、導体バンプ、または、導電性接着層を介して、何れかの前記層間絶縁層上に形成された前記導体パターン層と電気的に接続されている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記電子部品のパッドが、前記コア基板の何れか一方の主面上に形成された、前記第1の導体パターン及び前記第2の導体パターンとは異なる他の導体パターンとワイヤーを介して電気的に接続されている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記第2の導体パターンは、前記通孔の端面の周縁の内、前記通孔を介して向かい合う部分に形成されている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記第2の導体パターンは、前記通孔の端面の周縁に枠状に形成されている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記第2の導体パターンは、前記通孔の端面の周縁に、枠状に連続して形成されている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記第2の導体パターンは、前記通孔の端面の周縁に、枠状に不連続部分を含んで形成されている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記第2の導体パターンの側面は、前記コア基板の前記通孔が設けられた内壁面と略同一平面となっている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記第2の導体パターンの一部は、前記通孔内に突出している、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記第2の導体パターンは、前記通孔の端面の輪郭から所定距離離間して形成されている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記第2の導体パターンの最大幅が、前記第1の導体パターンの最大幅よりも大きい、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記第2の導体パターンの厚みは、前記第1の導体パターンの厚みと略同一である、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記通孔内における前記電子部品と前記コア基板の内壁との隙間に、樹脂材料が充填されている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記電子部品は、該電子部品の回路非形成面が、前記コア基板における前記第2の導体パターンの形成面と向かい合うようにして前記通孔内に収容されている、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - 前記第2の導体パターンは、前記コア基板の両主面上に形成される、
ことを特徴とする請求項1に記載の電子部品内蔵配線板。 - コア基板に電子部品を収容するための通孔を設ける工程と、
前記コア基板の少なくとも何れか一方の同一主面上に、第1の導体パターン及び第2の導体パターンを形成する工程と、
前記コア基板における前記第1の導体パターン及び前記第2の導体パターンの形成面に、粘着テープを貼り付ける工程と、
前記電子部品を前記通孔の底部における前記粘着テープの粘着面上に載置する工程と、
載置した前記電子部品と前記コア基板の内壁との隙間に樹脂材料を充填し、前記電子部品を固定する工程と、
前記電子部品の固定後、前記粘着テープを剥離する工程と、を有し、
前記第2の導体パターンは、前記通孔の端面の周縁の少なくとも一部に形成される、
ことを特徴とする電子部品内蔵配線板の製造方法。 - 前記電子部品と前記コア基板上に層間絶縁層と導体パターン層を形成する工程と、
前記絶縁層に、前記電子部品の端子と前記導体パターン層とを電気的に接続するビア導体を形成する工程と、をさらに有する、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。 - 前記第2の導体パターンは、前記通孔の端面の周縁の内、前記通孔を介して向かい合う部分に形成される、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。 - 前記第2の導体パターンは、前記通孔の端面の周縁に枠状に形成される、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。 - 前記第2の導体パターンは、前記通孔の端面の周縁に、枠状に連続して形成される、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。 - 前記第2の導体パターンは、前記通孔の端面の周縁に、枠状に不連続部分を含んで形成される、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。 - 前記第2の導体パターンは、その側面が前記コア基板の前記通孔が設けられた内壁面と略同一平面となるように形成される、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。 - 前記第2の導体パターンは、その一部が前記通孔内に突出するように形成される、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。 - 前記第2の導体パターンは、前記通孔の端面の輪郭から所定距離離間して形成される、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。 - 前記第2の導体パターンの最大幅が、前記第1の導体パターンの最大幅よりも大きい、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。 - 前記粘着テープは、紫外線の照射により粘着性が低下するUVテープである、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。 - 前記第2の導体パターンの厚みは、前記第1の導体パターンの厚みと略同一である、
ことを特徴とする請求項17に記載の電子部品内蔵配線板の製造方法。
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US20120142147A1 (en) | 2012-06-07 |
US20100078205A1 (en) | 2010-04-01 |
CN102150482A (zh) | 2011-08-10 |
CN102150482B (zh) | 2013-07-10 |
US8466372B2 (en) | 2013-06-18 |
KR20110045098A (ko) | 2011-05-03 |
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