JPH10270496A - 電子装置、情報処理装置、半導体装置並びに半導体チップの実装方法 - Google Patents
電子装置、情報処理装置、半導体装置並びに半導体チップの実装方法Info
- Publication number
- JPH10270496A JPH10270496A JP9075970A JP7597097A JPH10270496A JP H10270496 A JPH10270496 A JP H10270496A JP 9075970 A JP9075970 A JP 9075970A JP 7597097 A JP7597097 A JP 7597097A JP H10270496 A JPH10270496 A JP H10270496A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- semiconductor chip
- wiring board
- electrode pad
- bump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
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- H05K1/00—Printed circuits
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- H05K1/111—Pads for surface mounting, e.g. lay-out
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- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
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- H05K3/00—Apparatus or processes for manufacturing printed circuits
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Abstract
電極パッド4Aとバンプ電極15との間に隙間が生じ、
配線基板1の電極パッド4Aとバンプ電極15との接続
不良が発生する。 【解決手段】 配線基板1の実装面に接着材を介在して
固定され、かつ前記配線基板1の電極パッド4Aにバン
プ電極15を介在して外部端子13が電気的に接続され
た半導体チップ10を有する電子装置であって、前記電
極パッド4Aに凹部4Bが形成され、この凹部4B内に
おいて前記電極パッド4Aと前記バンプ電極15とが接
続されている。前記電極パッド4Aは柔軟層3の表面上
に形成され、前記凹部4Bは前記電極パッド4A及び柔
軟層3の弾性変形によって形成されている。
Description
に接着材を介在して固定され、かつ前記配線基板の電極
パッドにバンプ電極を介在して外部端子が電気的に接続
された半導体チップを有する電子装置及び半導体装置に
適用して有効な技術に関するものである。
装する実装方法として、配線基板の電極パッドと半導体
チップの外部端子との間にバンプ電極を介在して行うフ
リップチップ法がある。このフリップチップ法には、C
CB(Controled Collapse Bonding)法とFCA(Fli
p Chip Attach)法とがある。
半導体チップの外部端子とをバンプ電極で固着し、両者
間を電気的にかつ機械的に接続する方法である。具体的
には、まず、半導体チップの外部端子上に鉛(Pb)−錫
(Sn)組成の金属材からなるボール形状のバンプ電極を
形成する。次に、配線基板の電極パッドと半導体チップ
の外部端子との間にバンプ電極が介在されるように、配
線基板上に半導体チップを配置する。次に、熱処理を施
してバンプ電極を溶融し、配線基板の電極パッドと半導
体チップの外部端子とを固着する。このCCB法は、配
線基板の電極パッドと半導体チップの外部端子とをバン
プ電極で固着するので、配線基板と半導体チップとの熱
膨張係数の差に起因する熱応力がバンプ電極に集中し、
この熱応力によってバンプ電極が破損する場合がある。
そこで、CCB法においては、配線基板の電極パッドと
半導体チップの外部端子とをバンプ電極で固着した後、
配線基板と半導体チップとの間に樹脂を充填し、バンプ
電極の機械的強度を樹脂の機械的強度で補う試みがなさ
れている。この技術はアンダーフィル構造と称され、半
導体装置のパッケージング技術に利用されている。アン
ダーフィル構造の半導体装置については、例えば工業調
査会から発行された電子材料〔1996年、4月号、第
14頁乃至第19頁〕に記載されている。
上に形成されたバンプ電極を配線基板の電極パッドに圧
接し、両者間を電気的にかつ機械的に接続する方法であ
る。具体的には、まず、半導体チップの外部端子上に金
(Au)からなるスタッドバンプ構造のバンプ電極を形成
する。次に、配線基板の電極パッドと半導体チップの外
部端子との間にバンプ電極が介在されるように、配線基
板上に熱硬化性樹脂からなるシート形状の接着材を介在
して半導体チップを配置する。次に、半導体チップを熱
圧着し、配線基板の電極パッドにバンプ電極を接続した
状態で接着材を硬化させる。室温状態に戻った接着材に
は熱収縮力及び熱硬化収縮力等の圧縮力が生じ、この圧
縮力によってバンプ電極は配線基板の電極パッドに圧接
される。このFCA法は、前述のCCB法と異なり、配
線基板の電極パッドと半導体チップの外部端子とをバン
プ電極で固着していないので、配線基板と半導体チップ
との熱膨張係数の差に起因する熱応力がバンプ電極に集
中することはない。また、配線基板の電極パッドにバン
プ電極を接続する工程と、配線基板と半導体チップとの
間に樹脂を充填する工程が同一工程でなされる。このF
CA法は、配線基板上に複数個の半導体チップを塔載す
るメモリモジュール、CPU(Central Processing U
nit)モジュール等の電子装置の製造に有効である。
開平4−345041号公報並びに特開平5−1752
80号公報に記載されている。
FCA法について検討した結果、以下の問題点を見出し
た。
る接着材はバンプ電極よりも熱膨張係数が大きい樹脂で
形成されているので、接着材の厚さ方向の膨張量はバン
プ電極の高さ方向の膨張量よりも大きい。このため、温
度サイクル試験時において、配線基板の電極パッドとバ
ンプ電極との間に隙間が生じ、配線基板の電極パッドと
バンプ電極との接続不良が発生する。
よってバンプ電極は配線基板の電極パッドに圧接されて
いるが、熱の変化による膨張、収縮の変異量はバンプ電
極よりも接着材の方が大きいので、温度サイクル試験時
の膨張、収縮の繰り返しによってバンプ電極の先端(配
線基板の電極パッド側)に塑性変形が生じ、バンプ電極
の高さが低くなる。このため、配線基板の電極パッドと
バンプ電極との間に隙間が生じ、配線基板の電極パッド
とバンプ電極との接続不良が発生する。
バンプ電極との接続信頼性を高めることが可能な技術を
提供することにある。
な特徴は、本明細書の記述及び添付図面によって明らか
になるであろう。
発明のうち、代表的なものの概要を簡単に説明すれば、
下記のとおりである。
され、かつ前記配線基板の電極パッドにバンプ電極を介
在して外部端子が電気的に接続された半導体チップを有
する電子装置であって、前記電極パッドに凹部が形成さ
れ、この凹部内において前記電極パッドと前記バンプ電
極とが接続されている。前記電極パッドは柔軟層の表面
上に形成され、前記凹部は前記電極パッド及び柔軟層の
弾性変形によって形成されている。
当する分、配線基板と半導体チップとの間の隙間が狭く
なるので、配線基板と半導体チップとの間に介在される
接着材の厚さを薄くできる。この結果、接着材の厚さ方
向の膨張量を低減することができるので、温度サイクル
試験時における配線基板の電極パッドとバンプ電極との
接続不良を防止でき、両者間の接続信頼性を高めること
ができる。
の変異量を低減することができるので、温度サイクル試
験時の膨張、収縮の繰り返しによって生じるバンプ電極
の先端(配線基板の電極パッド側)の塑性変形を抑制でき
る。
施の形態を詳細に説明する。
全図において、同一機能を有するものは同一符号を付
け、その繰り返しの説明は省略する。
1であるメモリモジュール(電子装置)の平面図であり、
図2は、図1に示すA−A線の位置で切った要部断面図
であり、図3は、図2の要部拡大断面図である。
は、図1に示すように、配線基板1の実装面上に実装部
品として4つの半導体チップ10及び1つの半導体装置
20を塔載し、1つのメモリシステムを構成している。
4つの半導体チップ10の夫々には、記憶回路として例
えばSRAM(Static Random Access Memory)が塔
載されている。1つの半導体装置20には、4つの半導
体チップ10の夫々の記憶回路を制御する制御回路が塔
載されている。
ジット基板2の一表面上に柔軟層3を形成した構造で構
成されている。リジット基板2は、例えばガラス繊維に
エポキシ樹脂又はポリイミド樹脂を含浸させた樹脂基板
で構成されている。本実施形態のリジット基板2は多層
配線構造で構成されている。柔軟層3は、例えばエポキ
シ系の低弾性樹脂で形成されている。
ていないが、複数の電極パッド4Aが配置されている。
この複数の電極パッド4Aの夫々は、柔軟層3の表面上
を延在する配線4Cを介して、リジット基板2の一表面
上を延在する配線2Aに電気的に接続されている。配線
2Aは、リジット基板2の内部配線2Cを介して、リジ
ット基板2の裏面上に配置された複数の電極パッド2B
の夫々に電気的に接続されている。この複数の電極パッ
ド2Bの夫々には、例えばPb−Sn組成の金属材から
なるボール形状のバンプ電極17が電気的にかつ機械的
に接続されている。電極パッド4A、配線4C、配線2
A、電極パッド2B、内部配線2Cの夫々は例えば銅
(Cu)膜で形成されている。
保護膜5で被覆され、前記リジット基板2の裏面は保護
膜6で被覆されている。この保護膜5、保護膜6の夫々
は例えばポリイミド系の樹脂で形成されている。
の外部端子とリード22のインナー部とをボンディング
ワイヤ23で電気的に接続し、これらの半導体チップ2
1、リード22のインナー部及びボンディングワイヤ2
3等を樹脂封止体24で封止した構造で構成されてい
る。この半導体装置20のリード22のアウター部は、
配線基板1の電極パッド4Aに半田によって電気的にか
つ機械的に接続されている。
装面に接着材16を介在して接着固定されている。接着
材16は、例えばエポキシ系の熱硬化性樹脂で形成され
ている。
に、例えば単結晶珪素からなる半導体基板11を主体に
構成されている。半導体基板11の素子形成面(図3に
おいて下面)にはSRAMを構成する素子が形成され、
また、半導体基板11の素子形成面上には複数の外部端
子13が配置されている。この複数の外部端子13の夫
々は、半導体基板11の素子形成面上に絶縁層12を介
在して形成された配線層のうち、最上層の配線層に形成
され、例えばアルミニウム(Al)膜又はアルミニウム合
金膜で形成されている。複数の外部端子13の夫々は、
配線層に形成された配線を介してSRAMを構成する素
子に電気的に接続されている。最上層の配線層上には最
終保護膜14が形成されている。この最終保護膜14
は、例えばポリイミド・イソインドロ・キナゾリンジオ
ン(PIQ)樹脂で形成されている。
ップ10の外部端子13と前記配線基板1の電極パッド
4Aとの間には、バンプ電極15が介在されている。バ
ンプ電極15は、半導体チップ10の最終保護膜14に
形成された開口を通して、半導体チップ10の外部端子
13に固着され、電気的にかつ機械的に接続されてい
る。また、バンプ電極15は、配線基板1の保護膜5に
形成された開口を通して、配線基板1の電極パッド4A
に圧接され、電気的にかつ機械的に接続されている。こ
のバンプ電極15の圧接による接続は、熱収縮力及び熱
硬化収縮力等で接着材16に生じた圧縮力によって行な
われている。つまり、半導体チップ10は配線基板1の
実装面上にFCA法によって実装されている。
いが、例えばスタッドバンプ構造で構成されている。ス
タッドバンプ構造はボールボンディング法によって形成
される。ボールボンディング法は、Auワイヤの先端部
に形成されたボールを半導体チップの外部端子に熱圧着
し、その後、ボールの部分からAuワイヤを切断してバ
ンプ電極を形成する方法である。
ド4Aには凹部4Bが形成され、この凹部4B内におい
て、バンプ電極15と電極パッド4Aとが接続されてい
る。このバンプ電極15と電極パッド4Aとの接続は、
配線基板1の実装面から深さ方向に向って、半導体装置
20のリード22と電極パッド4Aとの接続よりも深い
位置で行なわれている。
に介在された接着材16の厚さは、図3に示すように、
配線基板1と半導体チップ10との間の隙間t2で規定
される。この隙間t2はバンプ電極15の高さで規定さ
れるが、バンプ電極15と電極パッド4Aとの接続が電
極パッド4Aに形成された凹部4B内において行なわれ
ているので、凹部4Bの凹み量t1に相当する分だけ狭
くなる。つまり、配線基板1の電極パッド4Aに凹部4
Bを形成し、この凹部4B内において、バンプ電極15
と電極パッド4Aとを接続することにより、凹部4Bの
凹み量t1に相当する分、配線基板1と半導体チップ1
0との間の隙間t2が狭くなるので、配線基板1と半導
体チップ10との間に介在される接着材16の厚さを薄
くすることができる。したがって、バンプ電極15の高
さを低くすることなく、配線基板1と半導体チップ10
との間に介在された接着材16の厚さ方向の膨張量を低
減することができる。
ッド4A及び柔軟層3の弾性変形によって形成されてい
る。この電極パッド4A及び柔軟層3の弾性変形は、配
線基板1の実装面上に半導体チップ10を実装する際、
半導体チップ10の圧着力でバンプ電極15が電極パッ
ド4Aを押圧することによって発生するので、バンプ電
極15には電極パッド4A及び柔軟層3の弾性力が作用
している。
び半導体チップ10の実装方法を図4乃至図7(製造方
法を説明するための断面図)を用いて説明する。
(A)に示すように、半導体チップ10の外部端子13上
にスタッドバンプ構造のバンプ電極15をボールボンデ
ィング法で形成する。ボールボンディング法は、Auワ
イヤの先端部に形成されたボールを半導体チップの外部
端子に熱圧着し、その後、ボールの部分からAuワイヤ
を切断してバンプ電極を形成する方法であるので、スタ
ッドバンプ構造のバンプ電極15の場合、リフトオフ法
及びボール供給法で形成されたバンプ電極に比べて高さ
が高くなる。
用キャリア治具30に前記半導体チップ10を装着して
バーンイン試験を施す。バーンイン試験は、顧客での使
用条件に比べて過酷な使用条件(負荷を与えた状態)で半
導体チップ10の回路動作を行い、顧客での使用中に欠
陥になるもの、ある意味では欠陥を加速的に発生せし
め、顧客に出荷する前の初期段階において不良品を排除
する目的として行なわれる。ベアチップ用キャリア治具
30は、主に、半導体チップ10を装着するベース部材
31と、絶縁性フィルム32Aの一表面に配線32Bが
形成されたフィルム部材32と、半導体チップ10の位
置合わせを行うガイド部材33と、半導体チップ10を
加圧固定する蓋部材34とで構成されている。このベア
チップ用キャリア治具30は絶縁性フィルム32Aに形
成された接続孔32Cを通して配線32Bとバンプ電極
15とを接続する構成になっているので、バンプ電極1
5の高さは絶縁性フィルム32Aの厚さよりも高くして
おかなければらない。
40上に前記半導体チップ10を配置し、半導体チップ
10を圧着してバンプ電極15の高さを揃える。
の実装面のチップ塔載領域にシート形状(フィルム形状)
に加工された接着材16を貼り付ける。接着材16は例
えばエポキシ系の熱硬化性樹脂で形成されている。配線
基板1は、リジット基板2の一表面上に柔軟層3を形成
した構造で構成され、柔軟層3の表面上に複数の電極パ
ッド4A及び配線4Cが配置され、柔軟層3の表面及び
配線4Cの表面が保護膜5で被覆され、リジット基板2
の裏面が保護膜6で被覆されている。
の実装面のチップ塔載領域上に接着材16を介在して半
導体チップ10を配置すると共に、配線基板1の電極パ
ッド4Aと半導体チップ10の外部端子13との間にバ
ンプ電極15を配置する。
プ10をヒータ41で熱圧着し、バンプ電極15で電極
パッド4Aを押圧して電極パッド4Aに凹部4Bを形成
し、この状態で接着材16を硬化させる。この工程にお
いて、凹部4Bの凹み量に相当する分、配線基板1と半
導体チップ10との間の隙間が狭くなり、配線基板1と
半導体チップ10との間に介在された接着材16の厚さ
が薄くなる。また、凹部4Bは電極パッド4A及び柔軟
層3の弾性変形によって形成されるので、バンプ電極1
5には電極パッド4A及び柔軟層3の弾性力が作用す
る。この工程により、図8に示すように、配線基板1上
に半導体チップ10が実装される。
上に半導体装置20を配置するともに、電極パッド4A
上にペート状の半田を介在してリード22を配置する。
を溶融し、配線基板1の電極パッド4Aと半導体装置2
0のリード22とを固着する。これにより、配線基板1
上に半導体装置20が実装される。
複数の電極パッド2Bの夫々にボール形状のバンプ電極
17を固着し、この後、洗浄処理及びベーク処理を施す
ことにより、図1及び図2に示すメモリモジュール(電
子装置)が完成する。
て熱膨張係数の小さい材料で形成する。
効果が得られる。
介在して固定され、かつ前記配線基板1の電極パッド4
Aにバンプ電極15を介在して外部端子13が電気的に
接続された半導体チップ10を有する電子装置であっ
て、前記電極パッド4Aに凹部4Bを形成し、この凹部
4B内において前記電極パッド4Aと前記バンプ電極1
5とを接続する。この構成により、凹部4Bの凹み量t
1に相当する分、配線基板1と半導体チップ10との間
の隙間t2が狭くなるので、配線基板1と半導体チップ
10との間に介在される接着材16の厚さを薄くでき
る。この結果、接着材16の厚さ方向の膨張量を低減す
ることができるので、温度サイクル試験時における配線
基板1の電極パッド4Aとバンプ電極15との接続不良
を防止でき、両者間の接続信頼性を高めることができ
る。
収縮の変異量を低減することができるので、温度サイク
ル試験時の膨張、収縮の繰り返しによって生じるバンプ
電極15の先端(配線基板の電極パッド側)の塑性変形を
抑制できる。したがって、配線基板1の電極パッド4A
とバンプ電極15との接続不良を防止でき、両者間の接
続信頼性を高めることができる。
面上に形成し、前記凹部4Bを前記電極パッド4A及び
柔軟層3の弾性変形によって形成する。この構成によ
り、電極パッド15に電極パッド4A及び柔軟層3の弾
性力が作用するので、配線基板1の電極パッド4Aとバ
ンプ電極15との圧接力が増加する。
てバンプ電極16が上方に移動しても、バンプ電極15
の移動に追従して凹部4Bの凹み量が変動するので、電
極パッド4Aとバンプ電極15との接続を確保できる。
樹脂からなるシート形状の接着材16を用いた例につい
て説明したが、例えば、異方性導電樹脂フィルム(Ani
s-otropic Conductive Film)や熱可塑性樹脂フィルム
を用いて行ってもよい。
形状の接着材16を貼り付けた例について説明したが、
図9(断面図)に示すように、シート形状の接続材16を
半導体チップ10に張り付けて行ってもよい。
チップ10との間に隙間を持たせた例について説明した
が、図10(断面図)に示すように、配線基板1に半導体
チップ10を接触させてもよい。この場合、電極パッド
4Aの領域上にしか接着材16が介在されないので、更
に、配線基板1の電極パッド4Aとバンプ電極15との
接続信頼性を高めることができる。
で形成した例について説明したが、バンプ電極15は、
例えばPb−Sn組成やSn−Ag組成からなる合金材
で形成してもよい。この場合、リフトオフ法やボール供
給法で形成されるので、図11(断面図)に示すように、
バンプ電極15はボール形状で形成される。
柔軟層3を介在して電極パッド4Aが形成された配線基
板1を用い、電極パッド4Aに凹部4Bを形成した例に
ついて説明したが、図12(断面図)に示すように、リジ
ット基板からなる配線基板19に溝19Aが形成され、
溝19A内に電極パッド4Aが形成され、溝19A内に
おいて、電極パッド4Aとバンプ電極15とが接続され
た構造で構成してもよい。この場合、溝19の深さに相
当する分、配線基板19と半導体チップ10との間の隙
間が狭くなるので、配線基板19と半導体チップ10と
の間に介在される接着材16の厚さを薄くできる。
2である半導体装置の断面図である。
ように、配線基板1の実装面上に実半導体チップ10を
塔載している。配線基板1は、前述の実施形態1と同様
に、リジット基板2の一表面上に柔軟層3を形成した構
造で構成されている。
ていないが、複数の電極パッド4Aが配置されている。
この複数の電極パッド4Aの夫々は、柔軟層3の表面上
を延在する配線4Cを介して、リジット基板2の一表面
上を延在する配線2Aに電気的に接続されている。配線
2Aは、リジット基板2の内部配線2Cを介して、リジ
ット基板2の裏面上に配置された複数の電極パッド2B
の夫々に電気的に接続されている。この複数の電極パッ
ド2Bの夫々には、例えばPb−Sn組成の金属材から
なるボール形状のバンプ電極17が電気的にかつ機械的
に接続されている。
保護膜5で被覆され、前記リジット基板2の裏面は保護
膜6で被覆されている。この保護膜5、保護膜6の夫々
は例えばポリイミド系の樹脂で形成されている。
装面に接着材16を介在して接着固定されている。接着
材16は、例えばエポキシ系の熱硬化性樹脂で形成され
ている。
素からなる半導体基板を主体に構成されている。半導体
基板の素子形成面上には複数の外部端子13が配置され
ている。この複数の外部端子13の夫々は、半導体基板
の素子形成面上に形成された配線層のうち最上層の配線
層に形成され、最上層の配線層上には最終保護膜14が
形成されている。
記配線基板1の電極パッド4Aとの間には、バンプ電極
15が介在されている。バンプ電極15は、半導体チッ
プ10の最終保護膜14に形成された開口を通して、半
導体チップ10の外部端子13に固着され、電気的にか
つ機械的に接続されている。また、バンプ電極15は、
配線基板1の保護膜5に形成された開口を通して、配線
基板1の電極パッド4Aに圧接され、電気的にかつ機械
的に接続されている。このバンプ電極15の圧接による
接続は、熱収縮力及び熱硬化収縮力等で接着材16に生
じた圧縮力によって行なわれている。つまり、半導体チ
ップ10は配線基板1の実装面上にFCA法によって実
装されている。
ド4Aには凹部4Bが形成され、この凹部4B内におい
て、バンプ電極15と電極パッド4Aとが接続されてい
る。
に介在された接着材16の厚さは、配線基板1と半導体
チップ10との間の隙間で規定される。この隙間はバン
プ電極15の高さで規定されるが、バンプ電極15と電
極パッド4Aとの接続が電極パッド4Aに形成された凹
部4B内において行なわれているので、凹部4Bの凹み
量に相当する分だけ狭くなる。つまり、配線基板1の電
極パッド4Aに凹部4Bを形成し、この凹部4B内にお
いて、バンプ電極15と電極パッド4Aとを接続するこ
とにより、凹部4Bの凹み量に相当する分、配線基板1
と半導体チップ10との間の隙間が狭くなるので、配線
基板極1と半導体チップ10との間に介在される接着材
16の厚さを薄くすることができる。したがって、バン
プ電極15の高さを低くすることなく、配線基板1と半
導体チップ10との間に介在された接着材16の厚さ方
向の膨張量を低減することができる。
ッド4A及び柔軟層3の弾性変形によって形成されてい
る。この電極パッド4A及び柔軟層3の弾性変形は、配
線基板1の実装面上に半導体チップ10を実装する際、
半導体チップ10の圧着力でバンプ電極15が電極パッ
ド4Aを押圧することによって発生するので、バンプ電
極15には電極パッド4A及び柔軟層3の弾性力が作用
している。
実施形態1と同様の方法で実装される。なお、柔軟層3
は接着材16の材料に比ベて熱膨張係数の小さい材料で
形成する。
の実施形態と同様の効果を得ることができる。
3であるCPUモジュール(電子装置)の平面図であり、
図15は図14に示すB−B線の位置で切った断面図で
あり、図16は図14に示すC−Cの位置で切った断面
図である。
ジュール50は、熱伝導度が高い金属板からなる熱拡散
板52をベースとし、この熱拡散板52にCPUモジュ
ール50の電力の殆どを消費して発熱量の大きいCPU
ベアチップ56とCPUモジュール基板51とを直接接
続した構造で構成されている。CPUベアチップ56と
CPUモジュール基板51は金ワイヤで電気的に接続さ
れ、CPUベアチップ56を収納したキャビティ53に
は、CPUモジュール基板51が直方体になるようにポ
ッティング樹脂55が充填されている。このように構成
されたCPUモジュール基板51には、さらに、キャッ
シュサブモジュール65、システムコントローラ60及
びインターフェース用コネクタ64といった主要部品が
塔載されている。キャッシュサブモジュール65とCP
Uモジュール基板51は、図16に示すように、バンプ
電極57を介して電気的に接続されている。
適応システムによりCPUモジュール50に塔載され
ず、インターフェース用コネクタ64からクロックを供
給する場合がある。小型チップ部品63は、比較的高周
波領域のノイズ対策として実装するチップセラミックコ
ンデンサ、及びバスのプルアップや初期設定のストラッ
ピング用のプルダウン、信号のダンピング等に使用する
チップ抵抗、及び温度センサーとして用いるチップサー
ミスタ等である。大型チップ部品62は、CPUベアチ
ップ56がクロック停止状態から復帰してクロック供給
を開始して通常動作状態に遷移する時などのように比較
的低周波領域での電源ノイズを吸収するための大容量の
例えばチップタンタルコンデンサや、温度のセンシング
をシリアルを介して温度情報を伝送するインテリジェン
トな温度センサー、及びCPUモジュール50が要求す
る特殊な電源電圧を作るのに必要なDC/DCコンバー
タやコイル、大容量のコンデンサなどである。
は、非同期型若しくはクロック同期型のSRAMが使用
され、データが格納されるキャッシュSRAM65Aを
必要なキャッシュ容量に応じて例えば256[kB]の
容量が必要であれば1[Mb]の容量のキャッシュSR
AM65Aを2個塔載し、512[kB]の容量が必要
であれば1[Mb]の容量のキャッシュSRAM65A
を4個塔載する。キャッシュサブモジュール65には4
個の塔載スペースがあるので2[Mb]構成のキャッシ
ュSRAM65Aを使用すれば1[MB]のキャッシュ
容量を確保できる。
にキャッシュSRAM65Aに格納したデータのアドレ
スの一部を格納するTAG・SRAM65B及び必要に
応じて、デカップリング用のチップセラミックコンデン
サや、例えば1[Mb]のキャッシュSRAM65Aを
2個用いて256[kB]のキャッシュ容量を実現する
か、4個用いて512[kB]の容量を実現するかの選
択を行うためのジャンパ用チップ抵抗が実装される。
65Bに要求される容量及びビット構成はキャッシュ方
式により様々であるのでここでは説明しない。キャッシ
ュSRAM65AとTAG・SRAM65Bのパッケー
ジ形態は、両方ともベアチップの場合、両方ともプラス
チックやセラミックでモールドされたパッケージの場
合、いずれかがベアチップで、いずれかがモールドされ
たパッケージの場合があるが、本実施形態では、キャッ
シュSRAM65Aにベアチップを使い、TAG・SR
AM65BにプラスチックモールドされたQFPを使っ
た場合である。
7に示すように、熱拡散板52には複数の固定用の穴が
設けられているだけで、電子部品等は一切塔載、実装せ
ず、水平平面型の熱インターフェースを供給する。この
ように、熱抵抗が低く単純な形状の熱インターフェイス
を供給することで、情報処理装置システムの放熱情報設
計が容易となる。
0は、図18に示すようなノートブック型パーソナルコ
ンピュータ等の情報処理装置70に組み込まれる。情報
処理装置70は液晶パネル71と調整ボリューム72等
を持つ構造で構成される。CPUモジュール50をマザ
ーボード73に接続し、CPUモジュール50の熱拡散
板52を下部筐体74に取り付ける事で、熱は主に下部
筐体74側に伝導し、マザーボード73には殆ど伝導し
ていかないので、キーボード75に熱が伝わらないの
で、キーボード75が熱くて情報処理装置70を操作す
るユーザに不快感を与えない情報処理装置が実現でき
る。なお、図18中、76はPCカードソケットであ
り、77はHDD/CD−ROMドライブである。ま
た、CPUモジュール50の熱拡散板52側を下部筐体
74に密着させるには、薄い熱伝導シートを使う方法及
びシリコングリースを塗布する方法等がある。
前記実施形態に基づき具体的に説明したが、本発明は、
前記実施形態に限定されるものではなく、その要旨を逸
脱しない範囲において種々変更可能であることは勿論で
ある。
的なものによって得られる効果を簡単に説明すれば、下
記のとおりである。
され、かつ前記配線基板の電極パッドにバンプ電極を介
在して外部端子が電気的に接続された半導体チップを有
する電子装置において、配線基板の電極パッドとバンプ
電極との接続信頼性を高めることができる。
て固定され、かつ前記配線基板の電極パッドにバンプ電
極を介在して外部端子が電気的に接続された半導体チッ
プを有する半導体装置において、配線基板の電極パッド
とバンプ電極との接続信頼性を高めることができる。
ップチップ実装であるため、基板表面からチップ裏面ま
での実装高さ及び実装エリアを他のワイヤボンディング
構造やフラットパッケージ(QFP)と比較して、実装高
さを低く、実装エリアを小さくすることができ、高密度
実装が可能となる。
ム(例えば情報処理装置)の薄型化、小型化が実現でき
る。
板は表面上の柔軟層が沈み込むため、実装高さは更に低
くすることができる。
(電子装置)の平面図である。
である。
図である。
図である。
図である。
図である。
図である。
る。
ある。
ある。
ある。
図である。
(電子装置)の平面図である。
面図である。
面図である。
す平面図である。
装置の概略構成図である。
電極パッド、4B…凹部、5,6…保護膜、10…半導
体チップ、13…外部端子、14…最終保護膜、15…
バンプ電極、16…接着材、19…配線基板、19A…
溝、20…半導体装置、22…リード、30…ベアチッ
プ用キャリア治具、40…ガラス基板、41…ヒータ、
50…CPUモジュール(電子装置)、51…CPUモジ
ュール基板、52…熱拡散板、53…キャビティ、55
…ポッティング樹脂、60…システムコントローラ、6
1…クロックドライバ、62…大型チップ部品、63…
小型チップ部品、64…インターフェース用コネクタ、
65…キャッシュサブモジュール、65A…キャッシュ
SRAM、65B…TAG・SRAM、70…情報処理
装置、71…液晶パネル、72…調整ボリューム、73
…マザーボード、74…下部筐体、75…キーボード、
76…PCカードソケット、77…HDD/CD−RO
Mドライブ。
Claims (16)
- 【請求項1】 配線基板の実装面に接着材を介在して固
定され、かつ前記配線基板の電極パッドにバンプ電極を
介在して外部端子が電気的に接続された半導体チップを
有する電子装置であって、前記電極パッドに凹部が形成
され、この凹部内において前記電極パッドと前記バンプ
電極とが接続されていることを特徴とする電子装置。 - 【請求項2】 前記電極パッドは柔軟層の表面上に形成
され、前記凹部は前記電極パッド及び前記柔軟層の弾性
変形によって形成されていることを特徴とする請求項1
に記載の電子装置。 - 【請求項3】 前記柔軟層はリジット基板の表面上に形
成されていることを特徴とする請求項2に記載の電子装
置。 - 【請求項4】 前記柔軟層は、前記接着材に比べて熱膨
張係数が小さい材料で形成されていることを特徴とする
請求項2又は請求項3に記載の電子装置。 - 【請求項5】 前記バンプ電極は、前記半導体チップの
外部端子に固着され、前記配線基板の電極パッドに圧接
されていることを特徴とする請求項1乃至請求項4のう
ちいずれか1項に記載の電子装置。 - 【請求項6】 前記バンプ電極はスタッドバンプ構造で
構成されていることを特徴とする請求項1乃至請求項5
のうちいずれか1項に記載の電子装置。 - 【請求項7】 前記接着材は、異方性導電樹脂フィルム
を使用していることを特徴とする請求項1乃至請求項6
のうちいずれか1項に記載の電子装置。 - 【請求項8】 請求項1乃至請求項7のうちいずれか1
項に記載の電子装置を組み込んでいることを特徴とする
情報処理装置。 - 【請求項9】 配線基板の実装面に接着材を介在して固
定され、かつ前記配線基板の電極パッドにバンプ電極を
介在して外部端子が電気的に接続された半導体チップを
有する半導体装置であって、前記電極パッドに凹部が形
成され、この凹部内において前記電極パッドと前記バン
プ電極とが接続されていることを特徴とする半導体装
置。 - 【請求項10】 前記電極パッドは柔軟層の表面上に形
成され、前記凹部は前記電極パッド及び前記柔軟層の弾
性変形によって形成されていることを特徴とする請求項
9に記載の半導体装置。 - 【請求項11】 前記柔軟層はリジット基板の表面上に
形成されていることを特徴とする請求項10に記載の半
導体装置。 - 【請求項12】 前記柔軟層は、前記接着材に比べて熱
膨張係数が小さい材料で形成されていることを特徴とす
る請求項10又は請求項11に記載の半導体装置。 - 【請求項13】 前記バンプ電極は、前記半導体チップ
の外部端子に固着され、前記配線基板の電極パッドに圧
接されていることを特徴とする請求項9乃至請求項12
のうちいずれか1項に記載の半導体装置。 - 【請求項14】 前記バンプ電極は、スタッドバンプ構
造で構成されていることを特徴とする請求項9乃至請求
項13のうちいずれか1項に記載の半導体装置。 - 【請求項15】 前記接着材は異方性導電樹脂フィルム
を使用していることを特徴とする請求項9乃至請求項1
4のうちいずれか1項に記載の半導体装置。 - 【請求項16】 配線基板の実装面に接着材を介在して
固定され、かつ前記配線基板の電極パッドにバンプ電極
を介在して外部端子が電気的に接続される半導体チップ
の実装方法であって、リジット基板上に柔軟層を介在し
て電極パッドが形成された配線基板と、外部端子上にバ
ンプ電極が形成された半導体チップを準備する工程と、
前記配線基板の実装面上に接着材を介在して前記半導体
チップを配置すると共に、前記配線基板の電極パッドと
前記半導体チップの外部端子との間に前記バンプ電極を
配置する工程と、前記半導体チップを熱圧着し、前記バ
ンプ電極で押圧して前記電極パッドに凹部を形成し、こ
の状態で前記接着材を硬化させる工程を備えたことを特
徴とする半導体チップの実装方法。
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9075970A JPH10270496A (ja) | 1997-03-27 | 1997-03-27 | 電子装置、情報処理装置、半導体装置並びに半導体チップの実装方法 |
TW087103476A TW418467B (en) | 1997-03-27 | 1998-03-10 | Process for mounting electronic device and semiconductor device |
SG1998000615A SG75830A1 (en) | 1997-03-27 | 1998-03-25 | Process for mounting electronic device and semiconductor device |
KR1019980010568A KR19980080736A (ko) | 1997-03-27 | 1998-03-26 | 전자장치 및 반도체 장치의 실장방법 |
US09/048,054 US6208525B1 (en) | 1997-03-27 | 1998-03-26 | Process for mounting electronic device and semiconductor device |
US09/565,070 US6461896B1 (en) | 1997-03-27 | 2000-05-05 | Process for mounting electronic device and semiconductor device |
US09/769,341 US20010002163A1 (en) | 1997-03-27 | 2001-01-26 | Process for mounting electronic device and semiconductor device |
US09/769,243 US20010002162A1 (en) | 1997-03-27 | 2001-01-26 | Process for mounting electronic device and semiconductor device |
US10/224,504 US6737741B2 (en) | 1997-03-27 | 2002-08-21 | Process for mounting electronic device and semiconductor device |
US10/224,339 US6780677B2 (en) | 1997-03-27 | 2002-08-21 | Process for mounting electronic device and semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9075970A JPH10270496A (ja) | 1997-03-27 | 1997-03-27 | 電子装置、情報処理装置、半導体装置並びに半導体チップの実装方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003086817A Division JP2003249522A (ja) | 2003-03-27 | 2003-03-27 | 電子装置の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10270496A true JPH10270496A (ja) | 1998-10-09 |
Family
ID=13591610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9075970A Withdrawn JPH10270496A (ja) | 1997-03-27 | 1997-03-27 | 電子装置、情報処理装置、半導体装置並びに半導体チップの実装方法 |
Country Status (5)
Country | Link |
---|---|
US (6) | US6208525B1 (ja) |
JP (1) | JPH10270496A (ja) |
KR (1) | KR19980080736A (ja) |
SG (1) | SG75830A1 (ja) |
TW (1) | TW418467B (ja) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2000019516A1 (en) * | 1998-09-30 | 2000-04-06 | Seiko Epson Corporation | Semiconductor device, connection method for semiconductor chip, circuit board and electronic apparatus |
EP1026744A1 (en) * | 1999-01-14 | 2000-08-09 | Sony Corporation | Video display and manufacturing method therefor |
US6492737B1 (en) | 2000-08-31 | 2002-12-10 | Hitachi, Ltd. | Electronic device and a method of manufacturing the same |
US6492829B1 (en) * | 2000-03-17 | 2002-12-10 | Hitachi, Ltd. | Contactor for inspection |
US6553660B2 (en) | 2000-08-31 | 2003-04-29 | Hitachi, Ltd. | Electronic device and a method of manufacturing the same |
US6646350B2 (en) | 2000-08-04 | 2003-11-11 | Hitachi, Ltd. | Semiconductor device |
US6660942B2 (en) | 2000-04-06 | 2003-12-09 | Shinko Electric Industries Co., Ltd. | Semiconductor device with an exposed external-connection terminal |
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US6410364B1 (en) | 1998-09-30 | 2002-06-25 | Seiko Epson Corporation | Semiconductor device, method of connecting a semiconductor chip, circuit board, and electronic equipment |
WO2000019516A1 (en) * | 1998-09-30 | 2000-04-06 | Seiko Epson Corporation | Semiconductor device, connection method for semiconductor chip, circuit board and electronic apparatus |
US6656771B2 (en) | 1998-09-30 | 2003-12-02 | Seiko Epson Corporation | Semiconductor device, method of connecting a semiconductor chip, circuit board, and electronic equipment |
EP1026744A1 (en) * | 1999-01-14 | 2000-08-09 | Sony Corporation | Video display and manufacturing method therefor |
US6876073B2 (en) | 2000-03-17 | 2005-04-05 | Renesas Technology Corp. | Semiconductor device and contractor for inspection |
US6492829B1 (en) * | 2000-03-17 | 2002-12-10 | Hitachi, Ltd. | Contactor for inspection |
US6660942B2 (en) | 2000-04-06 | 2003-12-09 | Shinko Electric Industries Co., Ltd. | Semiconductor device with an exposed external-connection terminal |
US6646350B2 (en) | 2000-08-04 | 2003-11-11 | Hitachi, Ltd. | Semiconductor device |
US6722028B2 (en) | 2000-08-31 | 2004-04-20 | Renesas Technology Corp. | Method of making electronic device |
SG101995A1 (en) * | 2000-08-31 | 2004-02-27 | Hitachi Ltd | An electronic device and a method of manufacturing the same |
US6553660B2 (en) | 2000-08-31 | 2003-04-29 | Hitachi, Ltd. | Electronic device and a method of manufacturing the same |
US6492737B1 (en) | 2000-08-31 | 2002-12-10 | Hitachi, Ltd. | Electronic device and a method of manufacturing the same |
US7015070B2 (en) | 2000-08-31 | 2006-03-21 | Renesas Technology Corp. | Electronic device and a method of manufacturing the same |
KR100776867B1 (ko) * | 2000-08-31 | 2007-11-16 | 가부시키가이샤 히타치세이사쿠쇼 | 전자 장치 및 그 제조 방법 |
JP2010192918A (ja) * | 2002-04-29 | 2010-09-02 | Interconnect Portfolio Llc | ダイレクト・コネクト形信号システム |
JP2011039507A (ja) * | 2003-01-22 | 2011-02-24 | Semiconductor Energy Lab Co Ltd | 半導体装置及び電子機器 |
JP2006098206A (ja) * | 2004-09-29 | 2006-04-13 | Kyocera Corp | 圧力検出装置用パッケージおよび圧力検出装置 |
JP4535825B2 (ja) * | 2004-09-29 | 2010-09-01 | 京セラ株式会社 | 圧力検出装置用パッケージおよび圧力検出装置 |
WO2011037185A1 (ja) * | 2009-09-24 | 2011-03-31 | 京セラ株式会社 | 実装用基板、発光体、および実装用基板の製造方法 |
JPWO2011037185A1 (ja) * | 2009-09-24 | 2013-02-21 | 京セラ株式会社 | 実装用基板、発光体、および実装用基板の製造方法 |
KR101651272B1 (ko) * | 2015-09-30 | 2016-08-26 | (주)플렉스컴 | 이방성 접착제를 이용하여 접속영역의 스트레스가 완화되는 연성 패키지 |
Also Published As
Publication number | Publication date |
---|---|
US20010002163A1 (en) | 2001-05-31 |
KR19980080736A (ko) | 1998-11-25 |
US20020195718A1 (en) | 2002-12-26 |
US6780677B2 (en) | 2004-08-24 |
US6208525B1 (en) | 2001-03-27 |
SG75830A1 (en) | 2000-10-24 |
TW418467B (en) | 2001-01-11 |
US20020192865A1 (en) | 2002-12-19 |
US20010002162A1 (en) | 2001-05-31 |
US6461896B1 (en) | 2002-10-08 |
US6737741B2 (en) | 2004-05-18 |
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