JP5205867B2 - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- JP5205867B2 JP5205867B2 JP2007219278A JP2007219278A JP5205867B2 JP 5205867 B2 JP5205867 B2 JP 5205867B2 JP 2007219278 A JP2007219278 A JP 2007219278A JP 2007219278 A JP2007219278 A JP 2007219278A JP 5205867 B2 JP5205867 B2 JP 5205867B2
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- semiconductor element
- electrode terminal
- external connection
- semiconductor
- bonding
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Classifications
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- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
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Description
また、基板上に、第1の半導体チップと、当該第1の半導体チップよりも大であって当該第1の半導体チップ上に積層配置された第2の半導体チップとが配置され、当該第2の半導体チップと基板との間に、複数の柱状の支持部を配設してなる構成が提案されている。(例えば、特許文献2参照)
(実施形態1)
本発明による半導体装置の実施形態その1について、図1乃至図9を用いて説明する。
そして、当該ボンディングステージに配設されたヒーターにより所定温度、例えば50℃〜200℃に加熱する。
当該接着剤層103は、塗布または貼付け等により予め配設される。
かかる導電性パッド110の表面へのバンプ111の配設は、第2の半導体素子104に於ける外部接続用電極端子104eが配設された位置に対応するように行われる。
即ち、当該バンプ111の高さは、第1の半導体素子102と接着剤層103との厚さからもたらされる高さと略一致する高さとされる。
この結果、前記バンプ111は、第2の半導体素子104に於ける外部接続用電極端子104eそれぞれの略直下に位置する。
かかるボンディングワイヤ109の接続の際、第2の半導体素子104の外部接続用電極端子104eの被ワイヤボンディング部は、前記バンプ111により機械的に支持され、当該第2の半導体素子104の湾曲が抑制されて、その破損が防止される。
この時、当該ボンディングワイヤ109に、所望のルーピング形状を付与する。
この様にして、半導体素子の外部接続電極端子と配線基板上の電極端子との間をワイヤボンディング法により接続した後、 配線基板101の主面上に形成された半導体素子の積層構造体を、ボンディングワイヤ108、109などと共に、封止用樹脂112より被覆する。(図3C参照)
封止用樹脂112の被覆方法としては、周知のトランスファーモールド法、コンプレッションモールド法、あるいはポッティング法を適用することができる。
尚、前記配線基板101が大判であって、当該配線基板101の一方の主面に、半導体素子の積層構造体が複数個形成される工程をとる場合(図示せず)には、前記外部接続用端子114の形成後、前記樹脂封止部112及び配線基板101をその積層方向(厚さ方向)に切断することにより、個片化された半導体装置100を得る。
次いで、当該ボール172を、ボンディングキャピラリ161により荷重と超音波振動を付与しつつ、被接続部材、即ち配線基板101の表面に配設された導電性パッド110上に押圧し、当該導電性パッド110に接続する。(図4B参照)
かかる接続処理により、前記ボール172は変形し、導電性パッド110表面に対し、平板状部をもって接続される。
これにより、前記導電性パッド110上には、平版状基部111aとその上面に突出した突出部111bを有するバンプ111が形成される。
即ち、バンプ111の突出部111b上面を、前記第1の半導体素子102側から第2の半導体素子104の延出方向に沿って降下する傾斜面とする。
かかる平坦面の形成は、前記図4に示す工程の後、バンプ111の頂部に、前記配線基板101と並行な平坦部を有するスタンピングツール又は平板状部材等を押し付けることにより行われる。
かかる積層構造体は、前記図4に示した方法を繰り返すことにより形成することができる。当該多段(多層)積層バンプの配設により、第2の半導体素子4の延出部の支持を確実に行うことができる。
即ち、当該バンプ111は、第2の半導体素子104に於ける複数の外部接続用電極端子104eそれぞれの略直下に位置して配設されている。(図示される状態では10個)
この様な形態であれば、第2の半導体素子104に於ける複数の外部接続用電極端子104eに対するワイヤボンディングの際、個々の被ボンディング電極端子に印加される押圧に対してその直下に位置するバンプ111が対応して、良好なワイヤボンディングがなされる。
又は、当該バンプ111を、半導体素子(前記半導体装置100に於ける第2の半導体素子104)の長手方向の端部の辺の略中央部にのみ配設(1個)する。(図6C参照)
あるいは、当該バンプ111を、半導体素子(前記半導体装置100に於ける第2の半導体素子104)の長手方向の端部両隅部、及び当該端部の辺の略中央部に配設(計3個)する。(図6D参照)
また、前記バンプ111は、半導体素子(前記半導体装置100に於ける第2の半導体素子104)の外部接続用電極端子配列の線上に位置することに限られず、当該外部接続用電極端子配列の線上から内側あるいは外側に偏寄して配置してもよい。(図示せず)
これらのバンプ配設構造に於いては、前記導電性パッド110は、長尺状である必要はなく、バンプ111が配設される箇所に対応して、選択的に配設されることを可とする。
これにより、半導体装置に於ける第1の半導体素子102と第2の半導体素子104との配置構成の設計自由度が向上する。
(実施形態2)
本発明による半導体装置の実施形態その2について、図9乃至図13用いて説明する。
この為、第1の半導体素子202の側部に於いて、第2の半導体素子204の延出(突出)部と配線基板201との間は離間している。
また、前記アンダーフィル材206は、熱硬化性あるいは熱可塑性の絶縁性樹脂を主体として形成され、例えばエポキシ系、ポリイミド系、アクリル系、あるいはシリコン系樹脂が適用される。
当該配線基板201は、必要に応じて多層配線構造がとられる。またアンダーフィル材206は、ノズル251を介して当該配線基板201上に選択的に滴下される。
当該ボンディングツール261による押圧および加熱を伴って、当該第1の半導体素子202の外部接続用突起電極202eを、配線基板201上の電極端子203に接続する。(図10C参照)
即ち、当該第1の半導体素子202は、フェイスダウン形態をもって搭載される。
かかるアンダーフィル材206の配設により、配線基板201の電極端子201eへの
第1の半導体素子202の外部接続用突起電極202eの接続が強化されると共に、当該第1の半導体素子202と配線基板201との間の空間への水分などの侵入が防止される。
かかる導電性パッド209の表面へのバンプ210の配設は、第2の半導体素子204に於ける外部接続用電極端子の配設された位置に対応するよう行われる。そして、当該バンプ210の高さは、前記第1の半導体素子202の背面の位置する高さと略同等の高さあるいはこれより若干低い高さとされる。(図11B参照)
即ち、当該バンプ210の高さは、外部接続用突起電極202eを含む第1の半導体素子202の厚さからもたらされる高さと略一致するかあるいはこれより若干低い高さとされる。当該バンプ210の高さが、外部接続用突起電極202eを含む第1の半導体素子202の厚さからもたらされる高さよりも若干低い高さとされる場合には、その高さは、後の工程で配設され、ワイヤボンディングがなされる第2の半導体素子204に於ける撓み量が、許容値を越えることのない高さとされる。
この結果、前記バンプ210は、第2の半導体素子204に於ける外部接続用電極端子204eそれぞれの略直下に位置することとなる。
かかるボンディングワイヤ208の接続の際、前記バンプ210によって、第2の半導体素子204の被ワイヤボンディング部は機械的に支持され、当該第2の半導体素子204の湾曲が抑制され、その破損が防止される。
この時、当該ボンディングワイヤ208には、所望のルーピング形状を付与する。
樹脂被覆方法としては、前述の如くトランスファーモールド法、コンプレッションモールド法、あるいはポッティング法を適用することができる。
尚、前記配線基板201が大判であって、当該配線基板201の一方の主面に、半導体素子の積層構造体が複数個形成される工程をとる場合(図示せず)には、前記外部接続用端子213の形成後、前記樹脂封止部211及び配線基板201をその積層方向(厚さ方向)に切断することにより、個片化された半導体装置200を得る。
かかる構成により、第2の半導体素子204に於ける外部接続用電極端子204eへのワイヤボンディングの際、当該バンプ210は、当該半導体素子204に生ずる湾曲に対し面接触状態をもって接する。(図13B参照)
これにより、当該半導体素子204はその湾曲が抑制され、破損が防止される。
(実施形態3)
本発明による半導体装置の実施形態その3について、図14乃至図22を用いて説明する。
そして、当該ボンディングステージに配設されたヒーターにより、当該配線基板301を所定温度、例えば50℃〜200℃に加熱する。
次いで、吸着コレット352によりその上面(電子回路形成面)が吸着された第2の半導体素子304を第1の半導体素子302上に載置し、当該吸着コレット352による押圧を伴って、当該第2の半導体素子304の裏面あるいは第1の半導体素子302の上面に予め選択的に配設された接着剤層305より、当該第2の半導体素子304を第1の半導体素子302上に固着する。(図15C参照)
前記接着剤層305は、塗布または貼付け等により予め配設される。
次いで、ボンディングキャピラリ371を用い、リバースボンディング法を適用して、ボンディングワイヤ311の始端であるボール部を配線基板301上の電極端子308に接続する。
この時、当該ボンディングワイヤ311には、所望のルーピング形状を付与する。
即ち、バンプ314aならびにバンプ314bは、積層構造をもってバンプ314を構成する。
この時、当該第3の半導体素子306に於ける外部接続用電極端子306eは、第1の半導体素子302の外部接続用電極端子302eの上に配設されたバンプ314の略直上に位置する。
かかるボンディングワイヤ313の接続の際、第3の半導体素子306の被ワイヤボンディング部は、バンプ314によって機械的に支持され、当該第3の半導体素子306の湾曲が抑制され、その破損が防止される。
この時、当該ボンディングワイヤ313には、所望のルーピング形状を付与する。
次いで、前記配線基板301の主面上に形成された半導体素子の積層構造体は、ボンディングワイヤと共に封止用樹脂315により被覆される。(図17C参照)
当該樹脂被覆を施す方法としては、周知のトランスファーモールド法、コンプレッションモールド法、あるいはポッティング法を適用することができる。
尚、前記配線基板301が大判であって、当該配線基板301の一方の主面に、半導体素子の積層構造体が複数個形成される工程をとる場合(図示せず)には、前記外部接続用端子316の形成後、前記樹脂封止部315及び配線基板301をその積層方向(厚さ方向)に切断することにより、個片化された半導体装置300を得る。
かかる構成により、第3の半導体素子306に於ける複数の外部接続用電極端子306eに対するワイヤボンディングの際、個々の被ボンディング電極端子に印加される押圧に対しその直下に位置するバンプ314が対応して、良好なワイヤボンディングがなされる。
あるいは、当該バンプ314bを、第1の半導体素子302に於ける外部接続用電極端子302e配列の内、選択された複数個(ここでは計4個)の外部接続用端子に於けるバンプ314a上のボンディングワイヤ311の終端部に対し配設する。(図18C参照)
すなわち、前記ボンディングワイヤ311の終端が接続されたバンプ314aの全てに 対してバンプ314bを配設することは行わず、その配設箇所を適宜選択する。
尚、当該図19Aも、前記図14Aに於いて、破線Aにより囲繞された矩形領域を表示している。
当該バンプ配設部325は、前記外部接続用電極端子302eと同様の材料から形成された端子パッド部と、その上に形成された少なくとも一つのバンプを含む。当該バンプは必要に応じて複数個積層される。
尚、当該図21Aも、前記図14Aに於いて、破線Aにより囲繞された矩形領域を表示している。
(実施形態4)
前述の如く、配線基板上に複数個の半導体素子を積層して搭載・配設する際に、当該半導体素子間に、所謂スペーサ部材を配設して積層構造を形成する場合がある。
(実施形態5)
本発明による半導体装置の実施形態その5について、図28乃至図31を用いて説明する。
当該接着剤503は、銀(Ag)、金(Au)、パラジウム(Pd)、銅(Cu)等の導電性材料からなる微粒子を含有していてもよい。
次いで、オーブン、ヒーターブロック等により例えば、150℃〜200℃に加熱して、前記接着剤503を硬化せしめ、第1の半導体素子502をダイステージ501a上に固着する。(図29C参照)
次いで、前記リードフレーム構造体501を、ダイボンダのボンディングステージ(図示せず)上に載置し、当該ボンディングステージに配設されたヒーターにより所定温度、例えば50℃〜200℃に加熱する。
当該スペーサ506は、シリコン(Si)片からなり、その被固着面には予め接着剤層507が被覆されている。
当該バンプ505aは、ボンディングキャピラリ571を用いての所謂ボールボンディング法によって形成することができる。
ここで、当該ボンディングワイヤ504は、その始端がリード501bのインナーリード部501b1に接続され、その終端は第1の半導体素子502の外部接続用電極端子502eに配設されているバンプ505a上に接続される。
即ち、第1の半導体素子502の外部接続用電極端子502e上には、バンプ505a及びバンプ505bが積層(縦積み)状態をもって配設される。
この時、当該第2の半導体素子508は、その外部接続用電極端子508eが、積層(縦積み)構造体とされているバンプ505の略直上に位置して固着される。
かかるバンプ511の配設の際、第2の半導体素子508の被ボンディング部は、前記バンプ505によって機械的に支持され、当該第2の半導体素子508の湾曲が抑制され、その破損が防止される。
ここで、当該ボンディングワイヤ510の始端がリード501bのインナーリード部501b1に接続され、またその終端は第2の半導体素子508の外部接続用電極端子508e上に配設されているバンプ511に接続される。
当該樹脂被覆は、周知のトランスファーモールド法を適用して行うことができる。
本発明は、本実施形態5に於けるTSOP型半導体装置の他、J型の外部接続端子を有する所謂SOJ(Small Out−line J−leaded Package)型半導体装置、あるいは外部接続端子を4方向に配置した所謂QFP(Quad Flat Package)型半導体装置にも適用することができる。
以下に本発明の特徴を付記する。
(付記1)
電極端子が配設された支持基体と、
前記支持基体上に搭載された中間部材と、
一部が前記中間部材により支持されて、前記支持基体上に配設された半導体素子と、
前記半導体素子の電極端子に対応して、前記支持基体上あるいは前記中間部材上に配設された凸状部材と
を具備し、
前記半導体素子の電極端子と前記支持基体上の電極端子が、ボンディングワイヤにより接続されてなることを特徴とする半導体装置。
(付記2)
前記中間部材は、他の半導体素子あるいはスペーサ部材であることを特徴とする付記1記載の半導体装置。
(付記3)
電極端子が配設された支持基板と、
前記支持基板上に搭載された第1の半導体素子と、
一部が前記第1の半導体素子により支持されて、前記支持基板上に配設された第2の半導体素子と、
前記第2の半導体素子の電極端子に対応して、前記支持基板上に配設された凸状部材と
を具備し、
前記第2の半導体素子の電極端子と前記支持基板上の電極端子が、ボンディングワイヤにより接続されてなることを特徴とする半導体装置。
(付記4)
電極端子が配設された支持基板と、
前記支持基板上に搭載されたスペーサ部材と、
一部が前記スペーサ部材により支持されて、前記支持基板上に配設された半導体素子と、
前記半導体素子の電極端子に対応して、前記支持基板上に配設された凸状部材と
を具備し、
前記半導体素子の電極端子と前記支持基板上の電極端子が、ボンディングワイヤにより接続されてなることを特徴とする半導体装置。
(付記5)
電極端子が配設された支持基板と、
前記支持基板上に搭載された第1の半導体素子と、
前記第1の半導体素子上に搭載されたスペーサ部材と、
一部が前記スペーサ部材により支持されて、前記支持基板上に配設された第2の半導体素子と、
前記第2の半導体素子の電極端子に対応して、前記第1の半導体素子上に配設された凸状部材と
を具備し、
前記第2の半導体素子の電極端子と前記支持基板上の電極端子が、ボンディングワイヤにより接続されてなることを特徴とする半導体装置。
(付記6)
ダイステージと、
前記ダイステージの周囲に配設された複数のリードと、
前記ダイステージ上に搭載された第1の半導体素子と、
前記第1の半導体素子上に配置されたスペーサと、
一部が前記スペーサに支持されて前記第1の半導体素子上に配設された第2の半導体素子と、
前記第2の半導体素子の電極端子に対応して、前記第1の半導体素子上に配設された凸状部材と
を有し、
前記第2の半導体素子の電極端子と前記リードが、ボンディングワイヤにより接続されてなることを特徴とする半導体装置。
(付記7)
前記凸状部材は、金属バンプであることを特徴とする付記1乃至6の何れか1項に記載の半導体装置。
(付記8)
前記第2の半導体素子は、前記第1の半導体素子から前記支持基板上に片持ち梁状に延出してなることを特徴とする付記3記載の半導体装置。
(付記9)
電極端子が配設された支持基体上に、中間部材を搭載する工程と、
前記支持基体上に、凸状部材を配設する工程と、
前記中間部材上に、半導体素子をフェイスアップ状態をもって搭載する工程と、
前記半導体素子の電極端子と前記支持基体の電極端子とをワイヤボンディング法により接続する工程と
を含むことを特徴とする半導体装置の製造方法。
(付記10)
電極端子が配設された支持基板上に、第1の半導体素子を搭載する工程と、
前記支持基板上に、凸状部材を配設する工程と、
前記第1の半導体素子上に、第2の半導体素子をフェイスアップ状態をもって搭載する工程と、
前記第2の半導体素子の電極端子と前記支持基板の電極端子とをワイヤボンディング法により接続する工程と
を含むことを特徴とする半導体装置の製造方法。
(付記11)
前記凸状部材は、金属バンプでありボールボンディング法により形成されることを特徴とする付記8又は9記載の半導体装置の製造方法。
(付記12)
前記第1の半導体素子上に前記第2の半導体素子を搭載する工程に於いて、
前記第1の半導体素子上に、第2の半導体素子を片持ち梁状に延出せしめて搭載することを特徴とする付記10記載の半導体装置の製造方法。
(付記13)
前記第1の半導体素子上に前記第2の半導体素子を搭載する工程に於いて、
前記第1の半導体素子上にスペーサ部材を搭載してから、第2の半導体素子を配設する
ことを特徴とする付記10記載の半導体装置の製造方法。
101、201、301、401:配線基板
102、202、302、402、502:第1の半導体素子
104、204、304、406、508:第2の半導体素子
306:第3の半導体素子
404、506:スペーサ
111、210、314、412、505:凸状部材(バンプ)
108、109、208、311、312、313、410、411、504、510:ボンディングワイヤ
112、211、315、413、512:封止用樹脂
114、213、317、415、501b2:外部接続用端子
Claims (5)
- 電極端子が配設された支持基体と、
前記支持基体上に搭載された中間部材と、
一部が前記中間部材により支持されて、前記支持基体上に配設された半導体素子と、
前記半導体素子の電極端子の直下において、前記支持基体上に配設された凸状部材とを有し、
前記凸状部材の高さは、前記中間部材と前記半導体素子とが接する面の位置する高さよりも低く、
前記中間部材は、他の半導体素子あるいはスペーサ部材であり、
前記半導体素子の電極端子と前記支持基体上の電極端子が、ボンディングワイヤにより接続されることを特徴とする半導体装置。 - 前記凸状部材は、金属バンプであることを特徴とする請求項1に記載の半導体装置。
- 電極端子が配設された支持基体上に、中間部材を搭載する工程と、
前記支持基体上に、前記中間部材の前記支持基体と対向する面と平行な前記中間部材の第1の面の位置する高さよりも低く凸状部材を配設する工程と、
前記中間部材上に、半導体素子をフェイスアップ状態をもって搭載する工程と、
前記半導体素子の電極端子と前記支持基体の電極端子とをワイヤボンディング法により接続する工程とを含み、
前記中間部材は、他の半導体素子あるいはスペーサ部材であることを特徴とする半導体装置の製造方法。 - 前記凸状部材は、前記半導体素子の電極端子と前記支持基体の電極端子とをワイヤボンディング法により接続する工程における前記半導体素子の撓み量の許容値を超えない範囲で、前記中間部材の第1の面の位置する高さよりも低く配設される請求項3に記載の半導体装置の製造方法。
- 前記凸状部材は、金属バンプでありボールボンディング法により形成されることを特徴とする請求項3に記載の半導体装置の製造方法。
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JP2009054747A (ja) | 2009-03-12 |
CN101378051B (zh) | 2012-10-10 |
CN101378051A (zh) | 2009-03-04 |
US20090057891A1 (en) | 2009-03-05 |
TWI397988B (zh) | 2013-06-01 |
KR101051350B1 (ko) | 2011-07-22 |
US8198728B2 (en) | 2012-06-12 |
TW200915532A (en) | 2009-04-01 |
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