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JP3570984B2 - Package for storing semiconductor elements - Google Patents
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JP3570984B2 - Package for storing semiconductor elements - Google Patents

Package for storing semiconductor elements Download PDF

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JP3570984B2
JP3570984B2 JP2000331615A JP2000331615A JP3570984B2 JP 3570984 B2 JP3570984 B2 JP 3570984B2 JP 2000331615 A JP2000331615 A JP 2000331615A JP 2000331615 A JP2000331615 A JP 2000331615A JP 3570984 B2 JP3570984 B2 JP 3570984B2
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dam frame
semiconductor element
conductor
external connection
dam
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JP2002141441A (en
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和之 岡田
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Kyocera Corp
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Kyocera Corp
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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10WGENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W70/00Package substrates; Interposers; Redistribution layers [RDL]
    • H10W70/60Insulating or insulated package substrates; Interposers; Redistribution layers
    • H10W70/67Insulating or insulated package substrates; Interposers; Redistribution layers characterised by their insulating layers or insulating parts
    • H10W70/68Shapes or dispositions thereof
    • H10W70/682Shapes or dispositions thereof comprising holes having chips therein
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10WGENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W72/00Interconnections or connectors in packages
    • H10W72/851Dispositions of multiple connectors or interconnections
    • H10W72/874On different surfaces
    • H10W72/884Die-attach connectors and bond wires
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10WGENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W90/00Package configurations
    • H10W90/701Package configurations characterised by the relative positions of pads or connectors relative to package parts
    • H10W90/731Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors
    • H10W90/734Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors between a chip and a stacked insulating package substrate, interposer or RDL
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10WGENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W90/00Package configurations
    • H10W90/701Package configurations characterised by the relative positions of pads or connectors relative to package parts
    • H10W90/751Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires
    • H10W90/754Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires between a chip and a stacked insulating package substrate, interposer or RDL

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  • Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、半導体集積回路素子等の半導体素子を収容するための半導体素子収納用パッケージに関するものである。
【0002】
【従来の技術】
従来、MPU等の半導体素子を収容するための半導体素子収納用パッケージとして、例えば図4に断面図で示すように、上面中央部に半導体素子Sが収容される穴部21aを有する配線基板21と、配線基板21の上面に穴部21aを取り囲んで形成され、穴部21aに収容された半導体素子Sを封止する封止材(図示せず)の穴部21a開口からの流出を防止するためのダム枠29とから構成されたパッケージが知られている。
【0003】
配線基板21は、この図の例では、上面中央部に半導体素子Sが搭載される搭載部22aを有する絶縁基板22と、中央部に半導体素子Sを収容する穴部21aを形成するための貫通穴25aを有するとともに上面に配線導体層24bが下面に接地用導体24aが被着形成された絶縁基板25と、中央部に貫通穴25aより大きい貫通穴27aを有するとともに上面に外部接続用導体24cが被着形成された絶縁基板27とを接着材23・26を介して積層することにより形成されている。なお、一般に、これらの絶縁基板22・25・27はガラス繊維入りの熱硬化性樹脂から成り、また、配線導体層24b・接地用導体24a・外部接続用導体24c等から成る配線導体24は銅等の金属箔から成り、さらには、接着材23・26はガラス繊維入りのエポキシ樹脂等の熱硬化性樹脂で構成されている。
【0004】
また、配線基板21の外周部には複数の貫通孔30が設けられており、貫通孔30内には外部接続用導体24cと配線導体層24b・接地用導体24cとをそれぞれ電気的に接続する銅等のめっき層から成る貫通導体31が被着形成されている。さらに、配線導体層24bには半導体素子Sの各電極がボンディングワイヤ32を介して接続され、外部接続用導体24cには半田ボール等の外部接続用端子33が取着される。また、配線基板21の上面にはエポキシ樹脂から成るソルダーレジスト層28が外部接続用導体24cの各々を独立して露出するようにして被着形成されており、さらに、このソルダーレジスト層28上には穴部21aを取り囲んでエポキシ樹脂等の熱硬化性樹脂から成るダム枠29が形成されている。
【0005】
なお、このダム枠29は、穴部21aに収容される半導体素子Sを封止する封止材の穴部21a開口からの流出を防止するためのものであり、近年、半導体素子収納用パッケージは高密度化が進み、ダム枠29が形成される穴部21aの開口縁と外部接続用導体24cとの間隔が2〜3mm程度の狭いものとなってきているために、画像認識装置等により穴部21aの開口縁を正確に認識しながらスクリーン印刷法等を採用することにより形成されている。
【0006】
そして、この半導体素子収納用パッケージは、絶縁基板22の搭載部22aに半導体素子Sを搭載するとともに配線導体層24bと半導体素子Sの各電極とをボンディングワイヤ32を介して接続した後、配線基板21の穴部21a内に液状の熱硬化性樹脂を充填して硬化させ、半導体素子Sを封止することによって半導体装置と成る。
【0007】
【発明が解決しようとする課題】
しかしながら、この従来の半導体素子収納用パッケージによると、配線基板21を構成する各絶縁基板22・25・27がガラス繊維入りの熱硬化性樹脂で形成されていることから、絶縁基板25・27に半導体素子収納用の貫通穴25a・27aを切削加工により形成する際にガラス繊維の切断面が毛羽立って貫通穴25a・27aの開口縁にバリが発生してしまい、貫通穴27aを取り囲んでダム枠29を形成する際に画像認識装置等により貫通穴27aの開口縁を正確に認識することができず貫通穴27aの開口縁に対するダム枠29の位置合わせの精度が低くなり、ダム枠29はその位置がずれて形成されてしまい、その結果、ダム枠29の一部がソルダーレジスト層28から露出した外部接続用導体24cの上に形成され、外部接続用導体24cと外部接続用端子33との接続を阻害してしまうという問題点を有していた。
【0008】
本発明は、かかる従来技術の問題点に鑑み案出されたものであり、その目的は、
ダム枠形成の際に画像認識装置等による位置合わせ精度を向上させ、ダム枠を位置精度良く形成することによって、ダム枠が外部接続用導体上に形成されて外部接続用導体と外部接続用端子との接続を阻害してしまうことのない半導体素子収納用パッケージを提供することにある。
【0009】
【課題を解決するための手段】
本発明の半導体素子収納用パッケージは、樹脂材料から成る絶縁基板に配線導体が被着形成されて成り、上面中央部に半導体素子が収容される穴部を有する配線基板と、該配線基板の上面に前記穴部を取り囲んで形成され、前記穴部に収容された半導体素子を封止する封止材の前記穴部開口からの流出を防止するためのダム枠と、該ダム枠の下方に無色透明の樹脂から成るソルダーレジスト層を介して前記配線導体により形成され、前記ダム枠の形成領域の角部または辺部を示すダム枠領域パターンとを具備することを特徴とするものである。
【0010】
本発明の半導体素子収納用パッケージによれば、ダム枠の下方に配線導体により形成され、ダム枠の形成領域を示すダム枠領域パターンを形成したことから、ダム枠形成の際に、このダム枠領域パターンを画像認識装置により認識して位置合わせすることによりスクリーン印刷法等での位置合わせ精度を向上させることが可能となり、ダム枠を位置精度良く形成でき、その結果、ダム枠が外部接続用導体上に形成されて外部接続用導体と外部接続用端子との接続を阻害することがない。
【0011】
【発明の実施の形態】
次に、本発明の半導体素子収納用パッケージを添付の図面に基づいて説明する。
図1は、本発明の半導体素子収納用パッケージの実施の形態の一例を示す断面図である。図中、1は配線基板、9はダム枠であり、主にこれらで本発明の半導体素子収納用パッケージが構成される。なお、本例では、中央部に半導体素子Sを搭載する搭載部2aを有する絶縁基板2と、中央部に半導体素子Sを収容する穴部1aを形成するための貫通穴5aを有するとともに上面に配線導体層4bが下面に接地用導体4aが被着形成された絶縁基板5と、中央部に貫通穴5aより大きい貫通穴7aを有するとともに上面に外部接続用導体4cおよびダム枠領域パターン4dが被着形成された絶縁基板7とを接着材3・6を介して接合して配線基板1形成している。なお、接地用導体4a・配線導体層4b・外部接続用導体4c・ダム枠領域パターン4dはこれらで配線導体4を構成している。
【0012】
配線基板1を構成する絶縁基板2・5・7は、例えばガラス−エポキシ樹脂やガラスクロス−ビスマレイミドトリアジン樹脂・ガラスクロス−ポリフェニレンエーテル樹脂・アラミド繊維−エポキシ樹脂等の樹脂材料から成り、半導体素子Sや接地用導体4a・配線導体層4b・外部接続用導体4c・ダム枠領域パターン4d等の配線導体4の支持体として機能する。
【0013】
このような配線基板1は、次に述べる方法により製作される。
【0014】
まず、絶縁基板2・5・7が、例えばガラスクロス−ビスマレイミドトリアジン樹脂から成る場合であれば、絶縁基板2と成るガラスクロス−ビスマレイミドトリアジン樹脂の板材と、絶縁基板5・7と成る表裏表面の略全面に銅等の金属箔から成る金属層が被着されたガラスクロス−ビスマレイミドトリアジン樹脂の板材とを準備する。なお、絶縁基板2・5・7は、配線基板1の外形寸法となるように、あらかじめ従来周知の切断加工や打ち抜き加工法を用いて所望の寸法に加工しておくことが好ましい。
【0015】
次に、絶縁基板5と成る板材に半導体素子Sを収容する穴部1aを形成する貫通穴5aをルーター加工機を用いたルータービット等の機械的研削により加工するとともに、板材表面の金属層をエッチング加工して上面に配線導体層4bを下面に接地用導体4aを形成する。
【0016】
配線導体層4bは、搭載される半導体素子Sの各電極を外部電気回路(図示せず)に電気的に接続するための機能を有し、絶縁基板5上面に、貫通穴5aの開口の内縁近傍から外周側に向けて被着形成されている。また、配線導体層4bの貫通穴5aの開口の内縁近傍には半導体素子Sの各電極がボンディングワイヤ12を介して接合され、外周側の部位は後述する貫通導体11を介して外部電気回路に接続される。接地用導体4aは、半導体素子Sに接地電位を供給するとともに配線導体層4bの特性インピーダンスを所定の値に調整する機能を有し、絶縁基板5の下面の略全面に形成されている。
【0017】
さらに、絶縁基板7と成る板材に貫通穴5aより大きい開口を有する貫通穴7aをルーター加工機を用いたルータービット等の機械的研削により加工するとともに、板材表面の金属層をエッチング加工して上面に外部接続用導体4cおよびダム枠領域パターン4dを形成する。
【0018】
外部接続用導体4cは、外部電気回路の配線導体との接続用パッドとしての機能を有し、絶縁基板7表面に貫通導体11と電気的に接続するように形成されている。また、ダム枠領域パターン4dは、その上方に後述するダム枠9を形成する際の形成領域を示す位置決めパターンとしての機能を有する。
【0019】
本発明の半導体素子収納用パッケージにおいては、ダム枠9の下方に、ダム枠9の形成領域を示すダム枠領域パターン4dを形成することが重要である。
【0020】
本発明の半導体素子収納用パッケージによれば、ダム枠9の下方に、ダム枠9の形成領域を示すダム枠領域パターン4dを形成したことから、ダム枠9形成の際に、このダム枠領域パターン4dを画像認識装置により認識して位置合わせすることによりスクリーン印刷法等での位置合わせ精度を向上させることが可能となり、ダム枠9を位置精度良く形成でき、その結果、ダム枠9が外部接続用導体4c上に形成されて外部接続用導体4cと外部接続用端子13との接続を阻害することがない。
【0021】
このようなダム枠領域パターン4dは、配線基板1の上面に穴部1aを取り囲んで枠状に形成されることが好ましいが、図2・図3に平面図で示すようにダム枠領域パターン4dが枠状と認識できるようにダム枠領域パターン4dの角部や辺部のみが形成されている。また、ダム枠領域パターン4dは、配線基板1の上面に形成される外部接続用導体4c等の配線導体4と接続して形成されていてもよい。なお、図2・図3は、ダム枠領域パターン4dの形成状態が明確になるように、配線基板1上面のダム枠9や外部接続用導体4cを除いた平面図を示している。
【0022】
次に、絶縁基板2・5・7を間に接着材3・6を挟んで積層し、圧力が 0.3〜0.5MPaで温度が180〜200℃の条件で60〜120分間加熱加圧することにより配線基板1となる積層体が形成される。なお、接着材3・6は、ガラスクロスにビスマレイミドトリアジン樹脂等を主成分とする熱硬化樹脂を含浸させて成るプリプレグが用いられている。
【0023】
さらに、配線基板1には、その上面から下面にかけてドリル加工等により穿設された複数の貫通孔10の内部に貫通導体11が形成されており、この貫通導体11により外部接続用導体4cと接地用導体4aや配線導体層4bとが電気的に接続されている。
【0024】
なお、接地用導体4aや配線導体層4b・外部接続用導体4c・ダム枠領域パターン4d等の配線導体4は、その露出する表面に、ニッケル・金等の良導電性で耐食性およびボンディングワイヤ12や外部接続用端子13との濡れ性が良好な金属をめっき法により、通常であれば1〜10μm程度の厚みのニッケルめっきおよび0.1〜3μm程度の厚みの金めっきが順次施される。これにより、接地用導体4aや配線導体層4b・外部接続用導体4c・ダム枠領域パターン4d等の配線導体4の酸化腐食を有効に防止することができるとともに、配線導体4とボンディングワイヤ12・外部接続用端子13との電気的接続を良好なものとなすことができる。
【0025】
また、 配線基板1は、外部接続用導体4c上に半田ボール等の外部接続用端子13を被着する際の外部接続用端子13の濡れ広がりを制御するために、必要に応じてソルダーレジスト層8が形成されていてもよい。このようなソルダーレジスト層8は、配線基板1の上面に、例えば、シリカ等のフィラーと電気絶縁性のエポキシ樹脂等を含む光硬化性や熱硬化性樹脂等を従来周知のスクリーン印刷法を採用して印刷塗布するとともにフォトリソグラフィー法を採用して所定パターンに形成し、しかる後、130〜180℃の温度で約1時間加熱・硬化することにより形成される。
【0026】
なお、ソルダーレジスト層8は、ダム枠領域パターン4dを覆って形成しており、ダム枠9を形成する際に画像認識装置によりダム枠領域パターン4dが検出できるように無色透明である。
【0027】
さらに、配線基板1の表面には、ダム枠領域パターン4dの上部にダム枠9が形成されている。ダム枠9は、半導体素子収納用の穴部1a内へ封止樹脂(図示せず)をポッティングして半導体素子Sを封止する際の樹脂流れを防止するダムの作用をする。このようなダム枠9は、画像検査装置でダム枠領域パターン4dを位置合わせ基準とし、例えば、従来周知のスクリーン印刷法を採用してシリカ等の電気絶縁性フィラーを含むエポキシ樹脂等の熱硬化性樹脂等を印刷塗布し、さらにこれを130〜180℃の温度で約1時間加熱・硬化することによって形成される。
【0028】
本発明の半導体素子収納用パッケージによれば、画像検査装置でダム枠領域パターン4dを位置合わせ基準としこれを画像認識装置により認識して位置合わせすることによりダム枠9を形成したことから、ダム枠9の位置合わせ精度を向上させることが可能となり、ダム枠9を位置精度良く形成でき、その結果、ダム枠9が外部接続用導体4c上に形成されて外部接続用導体4cと外部接続用端子13との接続を阻害することがない。
【0029】
なお、ダム枠9は、その外周辺および内周辺がダム枠領域パターン4dの外周辺および内周辺からそれぞれ0.5mm以内の範囲に位置して形成されていることが好ましく、0.5mm以上離れた位置に形成されると近接する外部接続用導体4cとの距離が狭いものとなり、ダム枠9の一部が外部接続用導体4c上に流入して外部接続用導体4cと外部接続用端子13との接続を阻害してしまう傾向がある。
従って、ダム枠9は、その外周辺および内周辺がダム枠領域パターン4dの外周辺および内周辺からそれぞれ0.5mm以内の範囲に位置して形成されていることが好ましい。
【0030】
また、ダム枠9は、その外周辺および内周辺がダム枠領域パターン4dの外周辺および内周辺からそれぞれパターンの内側へ0.5mm以内の範囲に位置して形成されていることがより好ましい。ダム枠9をその外周辺および内周辺がダム枠領域パターン4dの外周辺および内周辺からそれぞれパターンの内側へ0.5mm以内の範囲に位置して形成することにより、ダム枠9を形成後においてもダム枠領域パターン4dを確認することが可能となり、ダム枠9が所定の位置に精度よく形成されているかどうかを確認することができる。従って、ダム枠9は、その外周辺および内周辺がダム枠領域パターン4dの外周辺および内周辺からそれぞれパターンの内側へ0.5mm以内の範囲に位置して形成されていることがより好ましい。
【0031】
またさらに、ダム枠領域パターン4dをダム枠9と略同形状の枠状に形成することにより、ダム枠9の一部が外部接続用導体4c上に流入して外部接続用導体4cと外部接続用端子13との接続を阻害してしまうことがないとともにダム枠9形成後にダム枠9の位置を正確に確認することができる。
【0032】
かくして、本発明の半導体素子収納用パッケージによれば、絶縁基板2の搭載部2aに半導体素子Sを接着固定するとともに、半導体素子Sの各電極を配線導体層4bにボンディングワイヤ12を介して電気的に接続し、最後に半導体素子S封止用の封止剤を配線基板1の穴部1aに注入することにより半導体素子Sが気密に封止され、外部接続用導体4cを間に外部接続用端子13を介して外部電気回路基板の配線導体に接続することによって、半導体装置が外部電気回路基板に実装されるとともに、内部に収容する半導体素子Sが外部電気回路に電気的に接続されることとなる。
【0033】
なお、本発明の実施例は上述の実施例に限定されるものではなく、本発明の要旨を逸脱しない範囲であれば種々の変更は可能であり、例えば、絶縁層2の代わりに金属板から成る放熱板を用いてもよい。また、本発明の実施例では、3層の絶縁基体を用いて配線基板を形成したが、2層あるいは4層以上の絶縁基体を用いて配線基板を形成してもよい。
【0034】
【発明の効果】
本発明の半導体素子収納用パッケージによれば、ダム枠の下方に配線導体により形成され、ダム枠の形成領域を示すダム枠領域パターンを形成したことから、ダム枠形成の際に、このダム枠領域パターンを画像認識装置により認識して位置合わせすることによりスクリーン印刷法等での位置合わせ精度を向上させることが可能となり、ダム枠を位置精度良く形成でき、その結果、ダム枠が外部接続用導体上に形成されて外部接続用導体と外部接続用端子との接続を阻害することがない。
【図面の簡単な説明】
【図1】本発明の半導体素子収納用パッケージの実施の形態の一例を示す断面図である。
【図2】本発明の半導体素子収納用パッケージの実施の形態の一例を示す平面図である。
【図3】本発明の半導体素子収納用パッケージの実施の形態の他の一例を示す平面図である。
【図4】従来の半導体素子収納用パッケージの実施例を示す断面である。
【符号の説明】
1・・・・・・・配線基板
1a・・・・・・半導体素子収納用の穴部
2・5・7・・・絶縁基板
4・・・・・・・配線導体
4d・・・・・・ダム枠形成領域パターン
9・・・・・・・ダム枠
S・・・・・・・半導体素子
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a semiconductor element housing package for housing a semiconductor element such as a semiconductor integrated circuit element.
[0002]
[Prior art]
Conventionally, as a semiconductor element housing package for housing a semiconductor element such as an MPU, for example, as shown in a sectional view in FIG. A sealing material (not shown) formed on the upper surface of the wiring board 21 so as to surround the hole 21a and seals the semiconductor element S accommodated in the hole 21a is prevented from flowing out from the opening of the hole 21a. And a dam frame 29 are known.
[0003]
In the example shown in this figure, the wiring board 21 has an insulating substrate 22 having a mounting portion 22a in which a semiconductor element S is mounted in the center of the upper surface, and a through hole for forming a hole 21a for housing the semiconductor element S in the center. An insulating substrate 25 having a hole 25a, a wiring conductor layer 24b formed on the upper surface and a grounding conductor 24a adhered to the lower surface, a through hole 27a larger than the through hole 25a in the center, and an external connection conductor 24c formed on the upper surface. Is formed by laminating an insulating substrate 27 on which adhesion is formed via adhesives 23 and 26. Generally, these insulating substrates 22, 25, and 27 are made of thermosetting resin containing glass fiber, and the wiring conductor 24 composed of the wiring conductor layer 24b, the grounding conductor 24a, and the external connection conductor 24c is made of copper. Further, the adhesives 23 and 26 are made of a thermosetting resin such as an epoxy resin containing glass fiber.
[0004]
A plurality of through holes 30 are provided in the outer peripheral portion of the wiring board 21, and the external connection conductor 24 c and the wiring conductor layer 24 b and the grounding conductor 24 c are electrically connected in the through holes 30. A penetrating conductor 31 made of a plating layer of copper or the like is adhered and formed. Further, each electrode of the semiconductor element S is connected to the wiring conductor layer 24b via a bonding wire 32, and an external connection terminal 33 such as a solder ball is attached to the external connection conductor 24c. A solder resist layer 28 made of epoxy resin is formed on the upper surface of the wiring board 21 so as to expose each of the external connection conductors 24c independently. A dam frame 29 made of a thermosetting resin such as an epoxy resin is formed around the hole 21a.
[0005]
The dam frame 29 is for preventing the sealing material for sealing the semiconductor element S housed in the hole 21a from flowing out of the opening of the hole 21a. Since the density has been increased and the distance between the opening edge of the hole 21a in which the dam frame 29 is formed and the external connection conductor 24c has been reduced to about 2 to 3 mm, the hole has been formed by an image recognition device or the like. It is formed by employing a screen printing method or the like while accurately recognizing the opening edge of the portion 21a.
[0006]
The semiconductor element housing package mounts the semiconductor element S on the mounting portion 22a of the insulating substrate 22 and connects the wiring conductor layer 24b and each electrode of the semiconductor element S via bonding wires 32. A liquid thermosetting resin is filled into the holes 21a of the liquid crystal 21 and cured, and the semiconductor element S is sealed, thereby forming a semiconductor device.
[0007]
[Problems to be solved by the invention]
However, according to this conventional semiconductor element storage package, since the insulating substrates 22 25 27 constituting the wiring substrate 21 are formed of a thermosetting resin containing glass fiber, the insulating substrates 25 27 When the through holes 25a and 27a for accommodating the semiconductor element are formed by cutting, the cut surface of the glass fiber is fuzzed and burrs are generated at the opening edges of the through holes 25a and 27a. When forming the hole 29, the opening edge of the through hole 27a cannot be accurately recognized by an image recognition device or the like, and the positioning accuracy of the dam frame 29 with respect to the opening edge of the through hole 27a becomes low. As a result, a part of the dam frame 29 is formed on the external connection conductor 24c exposed from the solder resist layer 28, and the external connection is formed. It has a problem that the connection with the use conductor 24c and the external connection terminal 33 is impeded.
[0008]
The present invention has been devised in view of the problems of the related art, and its object is to
The dam frame is formed on the external connection conductor by improving the positioning accuracy of the image recognition device and the like when forming the dam frame, and forming the dam frame with high positional accuracy, so that the external connection conductor and the external connection terminal are formed. It is an object of the present invention to provide a package for housing a semiconductor element which does not hinder the connection with the semiconductor device.
[0009]
[Means for Solving the Problems]
A semiconductor element housing package according to the present invention includes a wiring substrate formed by attaching a wiring conductor to an insulating substrate made of a resin material, and having a hole in the center of the upper surface for accommodating the semiconductor element, and an upper surface of the wiring substrate. A dam frame formed to surround the hole and prevent a sealing material for sealing the semiconductor element housed in the hole from flowing out of the hole opening; A dam frame region pattern formed by the wiring conductor through a solder resist layer made of a transparent resin and indicating a corner or a side of a formation region of the dam frame.
[0010]
According to the semiconductor device housing package of the present invention, the dam frame is formed by the wiring conductor below the dam frame, and the dam frame region pattern indicating the formation region of the dam frame is formed. By recognizing and aligning the area pattern with an image recognition device, it is possible to improve the alignment accuracy by a screen printing method or the like, and to form the dam frame with high positional accuracy. As a result, the dam frame is used for external connection. The connection between the external connection conductor and the external connection terminal formed on the conductor is not hindered.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a semiconductor device storage package of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view showing an example of an embodiment of a semiconductor element storage package according to the present invention. In the drawing, reference numeral 1 denotes a wiring board, and 9 denotes a dam frame, which mainly constitutes a semiconductor device housing package of the present invention. In this example, the insulating substrate 2 has a mounting portion 2a for mounting the semiconductor element S in the center, and a through hole 5a for forming a hole 1a for housing the semiconductor element S in the center, and the upper surface has An insulating substrate 5 having a wiring conductor layer 4b formed on the lower surface thereof with a grounding conductor 4a attached thereto, a through hole 7a larger than the through hole 5a in the center, and an external connection conductor 4c and a dam frame region pattern 4d formed on the upper surface. The wiring board 1 is formed by joining the adhered and formed insulating substrate 7 via the adhesives 3 and 6. The grounding conductor 4a, the wiring conductor layer 4b, the external connection conductor 4c, and the dam frame region pattern 4d constitute the wiring conductor 4.
[0012]
The insulating substrates 2, 5, 7 constituting the wiring board 1 are made of a resin material such as glass-epoxy resin, glass cloth-bismaleimide triazine resin, glass cloth-polyphenylene ether resin, aramid fiber-epoxy resin, and the like. It functions as a support for the wiring conductors 4 such as S, the grounding conductor 4a, the wiring conductor layer 4b, the external connection conductor 4c, and the dam frame region pattern 4d.
[0013]
Such a wiring board 1 is manufactured by a method described below.
[0014]
First, when the insulating substrates 2, 5, 7 are made of, for example, a glass cloth-bismaleimide triazine resin, a plate material of the glass cloth-bismaleimide triazine resin, which becomes the insulating substrate 2, and the front and back sides, which become the insulating substrates 5, 7 A glass cloth-bismaleimide triazine resin plate material having a metal layer made of a metal foil such as copper adhered to substantially the entire surface is prepared. It is preferable that the insulating substrates 2, 5, and 7 be processed to have desired dimensions in advance by using a conventionally known cutting or punching method so as to have the outer dimensions of the wiring substrate 1.
[0015]
Next, a through-hole 5a forming a hole 1a for accommodating the semiconductor element S is formed in a plate material serving as the insulating substrate 5 by mechanical grinding such as a router bit using a router machine, and a metal layer on the plate material surface is removed. The wiring conductor layer 4b is formed on the upper surface and the grounding conductor 4a is formed on the lower surface by etching.
[0016]
The wiring conductor layer 4b has a function of electrically connecting each electrode of the semiconductor element S to be mounted to an external electric circuit (not shown), and has an inner edge of an opening of the through hole 5a on the upper surface of the insulating substrate 5. The coating is formed from the vicinity to the outer peripheral side. Each electrode of the semiconductor element S is bonded to the vicinity of the inner edge of the opening of the through hole 5a of the wiring conductor layer 4b via a bonding wire 12, and the outer peripheral portion is connected to an external electric circuit via a through conductor 11 described later. Connected. The grounding conductor 4a has a function of supplying a ground potential to the semiconductor element S and adjusting the characteristic impedance of the wiring conductor layer 4b to a predetermined value, and is formed over substantially the entire lower surface of the insulating substrate 5.
[0017]
Further, a through hole 7a having an opening larger than the through hole 5a is formed in the plate material serving as the insulating substrate 7 by mechanical grinding such as a router bit using a router machine, and a metal layer on the plate material surface is etched to form an upper surface. Then, an external connection conductor 4c and a dam frame region pattern 4d are formed.
[0018]
The external connection conductor 4c has a function as a connection pad with a wiring conductor of an external electric circuit, and is formed on the surface of the insulating substrate 7 so as to be electrically connected to the through conductor 11. The dam frame region pattern 4d has a function as a positioning pattern indicating a formation region when a dam frame 9 described later is formed above the dam frame region pattern 4d.
[0019]
In the package for accommodating a semiconductor element of the present invention, it is important to form a dam frame region pattern 4 d indicating a formation region of the dam frame 9 below the dam frame 9.
[0020]
According to the package for housing a semiconductor element of the present invention, the dam frame region pattern 4 d indicating the formation region of the dam frame 9 is formed below the dam frame 9. By recognizing and aligning the pattern 4d by the image recognition device, it is possible to improve the alignment accuracy by a screen printing method or the like, and the dam frame 9 can be formed with high positional accuracy. The connection between the external connection conductor 4c and the external connection terminal 13 formed on the connection conductor 4c does not hinder the connection.
[0021]
Such a dam frame region pattern 4d is preferably formed in a frame shape on the upper surface of the wiring board 1 so as to surround the hole 1a, but as shown in plan views in FIGS. Only the corners and sides of the dam frame region pattern 4d are formed so that the can be recognized as a frame. Further, the dam frame region pattern 4d may be formed so as to be connected to the wiring conductor 4 such as the external connection conductor 4c formed on the upper surface of the wiring board 1. 2 and 3 are plan views excluding the dam frame 9 and the external connection conductor 4c on the upper surface of the wiring board 1 so that the formation state of the dam frame region pattern 4d is clear.
[0022]
Next, the insulating substrates 2, 5, 7 are laminated with the adhesive 3.6 interposed therebetween, and heated and pressed for 60 to 120 minutes at a pressure of 0.3 to 0.5 MPa and a temperature of 180 to 200 ° C. As a result, a laminate to be the wiring board 1 is formed. As the adhesives 3 and 6, a prepreg formed by impregnating a glass cloth with a thermosetting resin mainly containing bismaleimide triazine resin or the like is used.
[0023]
Further, in the wiring board 1, a through conductor 11 is formed inside a plurality of through holes 10 formed by drilling or the like from the upper surface to the lower surface, and the through conductor 11 allows the external connection conductor 4c to be grounded. The use conductor 4a and the wiring conductor layer 4b are electrically connected.
[0024]
The wiring conductors 4 such as the grounding conductor 4a, the wiring conductor layer 4b, the external connection conductor 4c, and the dam frame region pattern 4d are provided on the exposed surface with good conductivity such as nickel and gold, corrosion resistance and bonding wire 12a. Usually, nickel plating having a thickness of about 1 to 10 μm and gold plating having a thickness of about 0.1 to 3 μm are sequentially applied to a metal having good wettability with the external connection terminal 13 by a plating method. Thereby, oxidation corrosion of the wiring conductors 4 such as the grounding conductor 4a, the wiring conductor layer 4b, the external connection conductor 4c, and the dam frame region pattern 4d can be effectively prevented. Good electrical connection with the external connection terminal 13 can be achieved.
[0025]
The wiring board 1 may be provided with a solder resist layer, if necessary, to control the wetting and spreading of the external connection terminals 13 when the external connection terminals 13 such as solder balls are applied on the external connection conductors 4c. 8 may be formed. Such a solder resist layer 8 is formed on the upper surface of the wiring substrate 1 by a conventionally known screen printing method using, for example, a photocurable or thermosetting resin containing a filler such as silica and an electrically insulating epoxy resin. Then, it is formed by applying a photolithography method to form a predetermined pattern, and then heating and curing at a temperature of 130 to 180 ° C. for about 1 hour.
[0026]
The solder resist layer 8 is formed so as to cover the dam frame region pattern 4d, and is colorless and transparent so that the image recognition device can detect the dam frame region pattern 4d when the dam frame 9 is formed.
[0027]
Further, on the surface of the wiring board 1, a dam frame 9 is formed above the dam frame region pattern 4d. The dam frame 9 acts as a dam for preventing resin flow when the semiconductor element S is sealed by potting a sealing resin (not shown) into the hole 1a for housing the semiconductor element. Such a dam frame 9 is formed by, for example, employing a well-known screen printing method with a thermosetting material such as an epoxy resin containing an electrically insulating filler such as silica by using a dam frame region pattern 4 d as a reference for alignment by an image inspection apparatus. It is formed by printing and applying a conductive resin or the like, and further heating and curing the resin at a temperature of 130 to 180 ° C. for about 1 hour.
[0028]
According to the package for housing semiconductor elements of the present invention, the dam frame 9 is formed by recognizing and positioning the dam frame region pattern 4d by the image recognition device using the image recognition device with the image inspection device. The positioning accuracy of the frame 9 can be improved, and the dam frame 9 can be formed with high positional accuracy. As a result, the dam frame 9 is formed on the external connection conductor 4c, and the external connection conductor 4c is connected to the external connection conductor 4c. The connection with the terminal 13 is not hindered.
[0029]
The dam frame 9 is preferably formed such that its outer periphery and inner periphery are located within a range of 0.5 mm or less from the outer periphery and inner periphery of the dam frame region pattern 4d, respectively. When formed at a position where the external connection conductor 4c is close to the external connection conductor 4c, a part of the dam frame 9 flows into the external connection conductor 4c and the external connection conductor 4c and the external connection terminal 13 There is a tendency to hinder the connection.
Therefore, it is preferable that the dam frame 9 is formed so that the outer periphery and the inner periphery are located within 0.5 mm from the outer periphery and the inner periphery of the dam frame region pattern 4d, respectively.
[0030]
It is more preferable that the dam frame 9 is formed so that the outer periphery and the inner periphery are located within 0.5 mm from the outer periphery and the inner periphery of the dam frame region pattern 4d to the inside of the pattern, respectively. By forming the dam frame 9 so that the outer periphery and the inner periphery are located within 0.5 mm from the outer periphery and the inner periphery of the dam frame region pattern 4d to the inside of the pattern, respectively, the dam frame 9 is formed after the dam frame 9 is formed. It is also possible to confirm the dam frame region pattern 4d, and it is possible to confirm whether the dam frame 9 is accurately formed at a predetermined position. Therefore, it is more preferable that the dam frame 9 is formed so that the outer periphery and the inner periphery are located within 0.5 mm from the outer periphery and the inner periphery of the dam frame region pattern 4d to the inside of the pattern, respectively.
[0031]
Further, by forming the dam frame region pattern 4d into a frame shape having substantially the same shape as the dam frame 9, a part of the dam frame 9 flows into the external connection conductor 4c and is connected to the external connection conductor 4c. The connection with the terminal 13 is not hindered, and the position of the dam frame 9 can be accurately confirmed after the dam frame 9 is formed.
[0032]
Thus, according to the package for housing a semiconductor element of the present invention, the semiconductor element S is bonded and fixed to the mounting portion 2a of the insulating substrate 2 and each electrode of the semiconductor element S is electrically connected to the wiring conductor layer 4b via the bonding wire 12. The semiconductor element S is hermetically sealed by injecting a sealant for sealing the semiconductor element S into the hole 1a of the wiring board 1 and finally connecting the external connection conductor 4c to the outside. The semiconductor device is mounted on the external electric circuit board by connecting to the wiring conductor of the external electric circuit board through the terminal 13 for use, and the semiconductor element S housed inside is electrically connected to the external electric circuit. It will be.
[0033]
Note that the embodiment of the present invention is not limited to the above-described embodiment, and various modifications are possible within a range not departing from the gist of the present invention. For example, a metal plate may be used instead of the insulating layer 2. May be used. Further, in the embodiment of the present invention, the wiring board is formed using three layers of the insulating base, but the wiring board may be formed using two or four or more layers of the insulating base.
[0034]
【The invention's effect】
According to the semiconductor device housing package of the present invention, the dam frame is formed by the wiring conductor below the dam frame, and the dam frame region pattern indicating the formation region of the dam frame is formed. By recognizing and aligning the area pattern with the image recognition device, it is possible to improve the alignment accuracy by a screen printing method or the like, and form the dam frame with high positional accuracy. As a result, the dam frame is used for external connection. The connection between the external connection conductor and the external connection terminal formed on the conductor is not hindered.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of an embodiment of a semiconductor device housing package according to the present invention.
FIG. 2 is a plan view showing an example of an embodiment of the semiconductor device housing package of the present invention.
FIG. 3 is a plan view showing another example of the embodiment of the semiconductor device housing package of the present invention.
FIG. 4 is a cross-sectional view showing an example of a conventional package for housing a semiconductor element.
[Explanation of symbols]
1 ... wiring board 1a ... holes for storing semiconductor elements 2, 5, 7 ... insulating substrate 4 ... wiring conductor 4d ... .Dum frame forming area pattern 9... Dam frame S... Semiconductor element

Claims (4)

樹脂材料から成る絶縁基板に配線導体が被着形成されて成り、上面中央部に半導体素子が収容される穴部を有する配線基板と、該配線基板の上面に前記穴部を取り囲んで形成され、前記穴部に収容された半導体素子を封止する封止材の前記穴部開口からの流出を防止するためのダム枠と、該ダム枠の下方に無色透明の樹脂から成るソルダーレジスト層を介して前記配線導体により形成され、前記ダム枠の形成領域の角部または辺部を示すダム枠領域パターンとを具備することを特徴とする半導体素子収納用パッケージ。 A wiring substrate formed by attaching a wiring conductor to an insulating substrate made of a resin material , having a hole in which a semiconductor element is accommodated in the center of the upper surface; and A dam frame for preventing a sealing material for sealing the semiconductor element housed in the hole from flowing out of the hole opening, and a solder resist layer made of a colorless and transparent resin below the dam frame. And a dam frame region pattern indicating a corner or a side of the formation region of the dam frame. 前記ダム枠は、その外周辺および内周辺が前記ダム枠領域パターンの外周辺および内周辺からそれぞれ0.5mm以内の範囲に位置して形成されていることを特徴とする請求項1記載の半導体素子収納用パッケージ。2. The semiconductor according to claim 1, wherein the dam frame is formed so that its outer periphery and inner periphery are located within 0.5 mm from the outer periphery and the inner periphery of the dam frame region pattern, respectively. Device storage package. 前記ダム枠は、その外周辺および内周辺が前記ダム枠領域パターンの外周辺および内周辺からそれぞれパターンの内側へ0.5mm以内の範囲に位置して形成されていることを特徴とする請求項1記載の半導体素子収納用パッケージ。The dam frame, wherein the outer periphery and the inner periphery are formed within a range of 0.5 mm or less from the outer periphery and the inner periphery of the dam frame region pattern to the inside of the pattern, respectively. 2. The package for housing a semiconductor element according to 1. 前記ダム枠領域パターンは、前記ダム枠と略同形状の枠状に形成されていることを特徴とする請求項1及至請求項3のいずれかに記載の半導体素子収納用パッケージ。4. The package according to claim 1, wherein the dam frame region pattern is formed in a frame shape having substantially the same shape as the dam frame. 5.
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