JP5195422B2 - 配線基板、実装基板及び電子装置 - Google Patents
配線基板、実装基板及び電子装置 Download PDFInfo
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- JP5195422B2 JP5195422B2 JP2008510896A JP2008510896A JP5195422B2 JP 5195422 B2 JP5195422 B2 JP 5195422B2 JP 2008510896 A JP2008510896 A JP 2008510896A JP 2008510896 A JP2008510896 A JP 2008510896A JP 5195422 B2 JP5195422 B2 JP 5195422B2
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- region
- wiring board
- reinforcing
- bent
- wiring
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49822—Multilayer substrates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/4985—Flexible insulating substrates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/562—Protection against mechanical damage
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
- H05K1/0281—Reinforcement details thereof
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
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- H05K3/4688—Composite multilayer circuits, i.e. comprising insulating layers having different properties
- H05K3/4691—Rigid-flexible multilayer circuits comprising rigid and flexible layers, e.g. having in the bending regions only flexible layers
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- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
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- H01L2224/02—Bonding areas; Manufacturing methods related thereto
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- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
- H01L2224/321—Disposition
- H01L2224/32151—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
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- H01L2924/0001—Technical content checked by a classifier
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- H01L2924/151—Die mounting substrate
- H01L2924/153—Connection portion
- H01L2924/1531—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/161—Cap
- H01L2924/1615—Shape
- H01L2924/16152—Cap comprising a cavity for hosting the device, e.g. U-shaped cap
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- H01L2924/351—Thermal stress
- H01L2924/3511—Warping
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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
- H05K2201/01—Dielectrics
- H05K2201/0183—Dielectric layers
- H05K2201/0187—Dielectric layers with regions of different dielectrics in the same layer, e.g. in a printed capacitor for locally changing the dielectric properties
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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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
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- H05K2201/2009—Reinforced areas, e.g. for a specific part of a flexible printed circuit
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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
- H05K2203/30—Details of processes not otherwise provided for in H05K2203/01 - H05K2203/17
- H05K2203/302—Bending a rigid substrate; Breaking rigid substrates by bending
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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
- H05K3/4614—Manufacturing multilayer circuits by laminating two or more circuit boards the electrical connections between the circuit boards being made during lamination
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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
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Description
しかしながら、電子部品を搭載した平面基板を曲面化させる場合には、電子部品のサイズ、あるいは曲面の曲率に応じて、はんだ接続不良が発生するという課題がある。また、平面状の配線基板への搭載を前提とした電子部品を、曲面で構成された配線基板上に実装した場合にも、電子部品のサイズ、あるいは曲面の曲率に応じて、はんだ接続不良が発生するという課題は同様である。
本発明の第1−2の視点においては、複数の絶縁層および配線層が交互に積層され、配線層間がビア接続され、可撓性を有する配線基板において、外部応力に対して補強された補強領域と、外部応力に対して前記補強領域よりも屈曲しやすい屈曲領域と、前記補強領域と前記屈曲領域の間の領域に配されるとともに、外部応力に対して前記補強領域よりも屈曲しやすく前記屈曲領域よりも屈曲しにくく、かつ、前記屈曲領域から前記補強領域に伝わる応力を緩和する応力緩和領域と、を含み、前記配線基板の前記補強領域において、前記配線基板の表面は平坦であり、前記配線基板の前記応力緩和領域において、前記配線基板が、その両面に曲率を有する面を含み、前記応力緩和領域の前記絶縁層のいずれか又は全ての重合度は、前記補強領域の前記絶縁層のいずれか又は全ての重合度よりも小さく、かつ、前記屈曲領域の前記絶縁層のいずれか又は全ての重合度より大きく構成され、前記補強領域近傍から前記屈曲領域近傍にかけて高い重合度から低い重合度に連続的に変化していることを特徴とする。(構成1−2)
本発明の前記配線基板において、前記絶縁層のいずれか又は全ては、感光性絶縁材料よりなることが好ましい。(構成6)
本発明の前記配線基板において、基板の片面又は両面において前記補強領域の外周境界線で囲まれた領域以内に複数のパッド部が配設されていることが好ましい。(構成7)
本発明の前記実装基板において、前記配線基板の一部または全てが湾曲したときに、前記補強領域の曲率は、前記屈曲領域の曲率よりも小さいことが好ましい。(構成9)
本発明の前記電子装置において、前記実装基板は、前記保持部材により保持される部位の一部または全部に前記補強領域が配され、その隣接する領域に前記応力緩和領域が配されることが好ましい。(構成11)
10 曲面基板(配線基板)
10a 補強領域
10b 応力緩和領域
10c 屈曲領域
10d 準補強領域
11 絶縁層
12 配線層
13、13A、13B、13C 絶縁層
14 ビア
14a バンプ
15 配線層
15a パッド部
16 配線層
16a パッド部
20 電子部品
30 はんだボール
40 マスク
50 保持部材
60 筐体
110 半導体装置
112 基板
114 半導体チップ
116 バンプ
118 構造物
120 接着剤
122 アンダーフィル
124 ボールバンプ
126 凹陥部
128 隙間
201 電子部品
202 はんだボール
203 配線基板
204 パッド
205 配線
206 ビア
301 配線基板
301a コア基板
301b ビルドアップ層
302、303 内部導体層
304、305 層間絶縁膜
306 表面導体層
307 ソルダーレジスト
309 端子電極(パッド)
310 電子部品
311 導電性接合材料
312 絶縁性変形阻害部(ビア)
401 多層配線基板
402 補強層
403 接着剤層
404 屈曲部
501 フレキシブル配線回路基板
502 ベース絶縁層
503 導体層
504 カバー絶縁層
505 電子部品
506 端子
507 補強板
508 補強部分
509 屈曲部分
511 実装支持部
512 応力緩和部
513 開口部
514 バンプ
本発明の実施形態1に係る実装基板について図面を用いて説明する。図1は、本発明の実施形態1に係る実装基板の構成および特性を示した図面であり、(a)は断面図であり、(b)はA−A´間の配線基板の弾性率に係る特性図である。図2は、本発明の実施形態1に係る実装基板における基材の第1の曲面形状を模式的に示した(A)上面図、(B)X−X´間の断面図、(C)Y−Y´間の断面図である。図3は、本発明の実施形態1に係る実装基板における基材の第2の曲面形状を模式的に示した(A)上面図、(B)X−X´間の断面図、(C)Y−Y´間の断面図である。
ボール30を介して電子部品20と配線基板10を機械的、電気的に接続する。
次に、本発明の実施形態2に係る実装基板について図面を用いて説明する。図5は、本発明の実施形態2に係る実装基板の構成および特性を示した図面であり、(a)は断面図であり、(b)はA−A´間の配線基板の弾性率に係る特性図である。図6は、本発明の実施形態2に係る実装基板の補強領域、応力緩和領域、及び屈曲領域を模式的に示した平面図である。
本発明の実施形態3に係る実装基板について図面を用いて説明する。図7は、本発明の実施形態3に係る実装基板の構成および特性を示した図面であり、(a)は断面図であり、(b)はA−A´間の配線基板の弾性率に係る特性図である。図8は、本発明の実施形態3に係る実装基板の補強領域、応力緩和領域、及び屈曲領域を模式的に示した平面図である。
本発明の実施形態4に係る実装基板について図面を用いて説明する。図9は、本発明の実施形態4に係る実装基板の構成および特性を示した図面であり、(a)は断面図であり、(b)はA−A´間の配線基板の弾性率に係る特性図である。
次に、本発明の実施形態5に係る実装基板について図面を用いて説明する。図11は、本発明の実施形態5に係る実装基板を実装した電子装置の構成および実装基板の特性を示した図面であり、(a)は部分断面図であり、(b)はB−B´間の配線基板の弾性率に係る特性図である。
Claims (11)
- 複数の絶縁層および配線層が交互に積層され、配線層間がビア接続され、可撓性を有する配線基板において、
外部応力に対して補強された補強領域と、
外部応力に対して前記補強領域よりも屈曲しやすい屈曲領域と、
前記補強領域と前記屈曲領域の間の領域に配されるとともに、外部応力に対して前記補強領域よりも屈曲しやすく前記屈曲領域よりも屈曲しにくく、かつ、前記屈曲領域から前記補強領域に伝わる応力を緩和する応力緩和領域と、
を含み、
前記配線基板の前記補強領域において、前記配線基板の表面は平坦であり、
前記配線基板の前記応力緩和領域において、前記配線基板が、その両面に曲率を有する面を含み、
前記応力緩和領域の前記絶縁層のいずれか又は全ての結晶度は、前記補強領域の前記絶縁層のいずれか又は全ての結晶度よりも小さく、かつ、前記屈曲領域の前記絶縁層のいずれか又は全ての結晶度より大きく構成され、前記補強領域近傍から前記屈曲領域近傍にかけて高い結晶度から低い結晶度に連続的に変化していることを特徴とする配線基板。 - 複数の絶縁層および配線層が交互に積層され、配線層間がビア接続され、可撓性を有する配線基板において、
外部応力に対して補強された補強領域と、
外部応力に対して前記補強領域よりも屈曲しやすい屈曲領域と、
前記補強領域と前記屈曲領域の間の領域に配されるとともに、外部応力に対して前記補強領域よりも屈曲しやすく前記屈曲領域よりも屈曲しにくく、かつ、前記屈曲領域から前記補強領域に伝わる応力を緩和する応力緩和領域と、
を含み、
前記配線基板の前記補強領域において、前記配線基板の表面は平坦であり、
前記配線基板の前記応力緩和領域において、前記配線基板が、その両面に曲率を有する面を含み、
前記応力緩和領域の前記絶縁層のいずれか又は全ての重合度は、前記補強領域の前記絶縁層のいずれか又は全ての重合度よりも小さく、かつ、前記屈曲領域の前記絶縁層のいずれか又は全ての重合度より大きく構成され、前記補強領域近傍から前記屈曲領域近傍にかけて高い重合度から低い重合度に連続的に変化していることを特徴とする配線基板。 - 前記応力緩和領域の前記絶縁層のいずれか又は全ての結晶度は、前記補強領域の前記絶縁層のいずれか又は全ての結晶度よりも小さく、かつ、前記屈曲領域の前記絶縁層のいずれか又は全ての結晶度より大きく構成され、前記補強領域近傍から前記屈曲領域近傍にかけて高い結晶度から低い結晶度に連続的に変化していることを特徴とする請求項2記載の配線基板。
- 前記応力緩和領域の弾性率は、前記補強領域の弾性率よりも小さく、かつ、前記屈曲領域の弾性率よりも大きくなるように構成され、前記補強領域近傍から前記屈曲領域近傍にかけて高い弾性率から低い弾性率に連続的に変化していることを特徴とする請求項1乃至3のいずれか一に記載の配線基板。
- 前記補強領域の内周に配されるとともに、前記補強領域よりも屈曲しやすく、かつ、前記補強領域に囲まれることで補強された準補強領域を含み、
前記屈曲領域および前記応力緩和領域は、前記補強領域の外周に配されることを特徴とする請求項1乃至4のいずれか一に記載の配線基板。 - 前記絶縁層のいずれか又は全ては、感光性絶縁材料よりなることを特徴とする請求項1乃至5のいずれか一に記載の配線基板。
- 基板の片面又は両面において前記補強領域の外周境界線で囲まれた領域以内に複数のパッド部が配設されていることを特徴とする請求項1乃至6のいずれか一に記載の配線基板。
- 請求項7記載の配線基板と、
前記パッド部上に導電体を介して、電気的、機械的に接続された電子部品と、
を含むことを特徴とする実装基板。 - 前記配線基板の一部または全てが湾曲したときに、前記補強領域の曲率は、前記屈曲領域の曲率よりも小さいことを特徴とする請求項8記載の実装基板。
- 曲面を有する筐体と、
請求項8又は9記載の実装基板と、
前記筐体内に配設されるとともに、前記実装基板を保持する保持部材と、
を含むことを特徴とする電子装置。 - 前記実装基板は、前記保持部材により保持される部位の一部または全部に前記補強領域が配され、その隣接する領域に前記応力緩和領域が配されることを特徴とする請求項10記載の電子装置。
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JPWO2007119608A1 (ja) | 2009-08-27 |
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US20090107703A1 (en) | 2009-04-30 |
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