JP2006512775A - 半導体デバイスの作製方法及びフリップチップ集積回路 - Google Patents
半導体デバイスの作製方法及びフリップチップ集積回路 Download PDFInfo
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- JP2006512775A JP2006512775A JP2004565759A JP2004565759A JP2006512775A JP 2006512775 A JP2006512775 A JP 2006512775A JP 2004565759 A JP2004565759 A JP 2004565759A JP 2004565759 A JP2004565759 A JP 2004565759A JP 2006512775 A JP2006512775 A JP 2006512775A
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Abstract
Description
<作製方法>
図1は、本発明によるフリップチップ集積回路の作製方法の一実施形態を説明するためのフローチャートを示す図である。まず、第1のステップ12では、ウェハ上に半導体デバイスの層及びデバイス端子を形成する。好ましい半導体デバイスは、サファイア、SiC又はSiのウェハ上に成長させた、AlGaNのHEMT又はFETなどのIII族窒化物ベースのデバイスであり、その場合、好ましいウェハはSiCの4H型ポリタイプである。3C、6Hや15R型ポリタイプなど、SiCの他のポリタイプも使用することができる。ウェハとデバイスの能動層との間にAlxGa1-xNのバッファ層(xは0と1の間の数値)を含ませて、SiCウェハ(基板)と能動層との間に適切な結晶構造の移行部を形成することができる。
本発明は、受動素子及びインターコネクトを有する回路基板上にフリップチップ実装された能動半導体デバイスも開示している。
Claims (38)
- それぞれ少なくとも2つの半導体材料層と、該各半導体材料層に電気接続する複数の端子とを備えた複数の能動半導体デバイスをウェハ上に形成するステップと、
前記複数の端子のうちの1つの上に、少なくとも1つのボンディングパッドをそれぞれ形成するステップと、
前記複数の能動半導体デバイスのそれぞれを分離するステップと、
回路基板の表面にドライブ電子回路を形成するステップと、
前記回路基板上に前記能動半導体デバイスのうち少なくとも1つをフリップチップ実装するステップであって、前記ボンディングパッドのうち少なくとも1つを前記回路基板に結合し、前記端子のうち少なくとも1つを前記ドライブ電子回路に電気接続するステップと
を有することを特徴とする半導体デバイスの作製方法。 - 前記ドライブ電子回路が、受動素子とインターコネクトとを備えることを特徴とする請求項1に記載の半導体デバイスの作製方法。
- 前記ドライブ電子回路が、1つ又は複数の前段増幅器とインターコネクトとを備えることを特徴とする請求項1に記載の半導体デバイスの作製方法。
- 前記ドライブ電子回路が、受動素子をさらに備えることを特徴とする請求項3に記載の半導体デバイスの作製方法。
- 前記回路基板上に前記少なくとも1つの能動半導体デバイスをフリップチップ実装する前に、前記回路基板を貫通する少なくとも1つの導電性ビアを形成するステップであって、前記ボンディングパッドのうち少なくとも1つを前記導電性ビアのうちの1つと電気接続するステップをさらに有することを特徴とする請求項1に記載の半導体デバイスの作製方法。
- 前記少なくとも1つの導電性ビアのそれぞれを、前記回路基板を貫通する孔部をエッチングし、該孔部の内部表面に導電材料層を堆積させることによって形成することを特徴とする請求項5に記載の半導体デバイスの作製方法。
- 前記回路基板の前記ドライブ電子回路とは反対側の表面に、前記導電性ビアのそれぞれと熱/電気接続して前記各導電性ビアの接地部を形成するとともに、熱放散を助ける導電材料層を形成するステップをさらに有することを特徴とする請求項5に記載の半導体デバイスの作製方法。
- 前記導電性ビア及び導電材料層が、スパッタリングを利用して形成されることを特徴とする請求項7に記載の半導体デバイスの作製方法。
- フリップチップ実装された前記複数の能動半導体デバイス及び前記回路基板からの熱放散を助けるヒートシンクを提供するステップをさらに有することを特徴とする請求項1に記載の半導体デバイスの作製方法。
- 前記ヒートシンクを、前記フリップチップ実装された能動半導体デバイスに隣接して配置することを特徴とする請求項9に記載の半導体デバイスの作製方法。
- 前記ヒートシンクを、前記回路基板に隣接して配置することを特徴とする請求項9に記載の半導体デバイスの作製方法。
- 前記複数の能動半導体デバイスのそれぞれの前記少なくとも2つの半導体材料層を、有機金属気相成長法(MOCVD)、プラズマ気相成長法(CVD)又は熱フィラメントCVDからなる群からの方法のうちの1つによって形成することを特徴とする請求項1に記載の半導体デバイスの作製方法。
- 前記少なくとも2つの半導体材料層のうち少なくとも1つをエッチングして前記複数の端子のための場所を形成することを特徴とする請求項1に記載の半導体デバイスの作製方法。
- 前記少なくとも1つのエッチングされる層を、フッ化水素酸(HF)ウェット化学エッチング、反応性イオンエッチング(RIE)及びプラズマエッチングからなる群のいずれかの方法によってエッチングすることを特徴とする請求項13に記載の半導体デバイスの作製方法。
- 前記複数の能動半導体デバイスのそれぞれが、サファイア又は炭化ケイ素(SiC)のウェハ上に形成されたIII族窒化物ベースのデバイスからなることを特徴とする請求項1に記載の半導体デバイスの作製方法。
- 前記複数の能動半導体デバイスのそれぞれが、炭化ケイ素(SiC)の基板上に形成されたAlGaN/GaNからなる高電子移動度トランジスタ(HEMT)であることを特徴とする請求項1に記載の半導体デバイスの作製方法。
- 前記回路基板が、Si及びGaAsからなる群のいずれかの材料であることを特徴とする請求項1に記載の半導体デバイスの作製方法。
- 一方の表面にドライブ電子回路を有する回路基板と、
複数の半導体材料層を有する基板及び複数の端子を備え、該端子のそれぞれが前記半導体材料層のうちの1つに電気接続する能動半導体デバイスと
を備え、
前記能動半導体デバイスが前記回路基板にフリップチップ実装され、前記端子のうち少なくとも1つが前記ドライブ電子回路と電気接続していることを特徴とするフリップチップ集積回路。 - 前記回路基板を貫通する少なくとも1つの導電性ビアをさらに備え、前記導電性ビアのそれぞれが前記複数の端子の1つと電気接続していることを特徴とする請求項18に記載のフリップチップ集積回路。
- 前記少なくとも1つの導電性ビアが、前記回路基板を貫通する孔部を備え、前記孔部の表面が第1の導電材料層で覆われていることを特徴とする請求項19に記載のフリップチップ集積回路。
- 前記回路基板の前記ドライブ電子回路とは反対側の表面に第2の導電材料層をさらに備えていることを特徴とする請求項20に記載のフリップチップ集積回路。
- 前記第2の導電材料層が、前記第1の導電材料層に熱/電気接続し、前記第2の導電材料層が、前記導電性ビアの接地部を形成するとともに、前記能動半導体デバイスからの熱を放散することを特徴とする請求項21に記載のフリップチップ集積回路。
- 前記能動半導体デバイス及び受動素子からの熱の放散を助けるための少なくとも1つのヒートシンク用ベースプレートをさらに備えていることを特徴とする請求項18に記載のフリップチップ集積回路。
- 前記少なくとも1つのヒートシンク用ベースプレートが、前記回路基板に隣接して配置されたヒートシンク用ベースプレートを含むことを特徴とする請求項23に記載のフリップチップ集積回路。
- 前記回路基板の前記ドライブ電子回路とは反対側の表面に第2の導電材料層をさらに備え、前記少なくとも1つのヒートシンク用ベースプレートが、前記第2の導電材料層に隣接して配置されたヒートシンク用ベースプレートを含むことを特徴とする請求項23に記載のフリップチップ集積回路。
- 前記半導体材料層がIII族窒化物ベースの材料であり、前記基板がサファイア又は炭化ケイ素であることを特徴とする請求項18に記載のフリップチップ集積回路。
- 互いに電気接続している、前記少なくとも1つの端子のそれぞれと導電性ビアとの間に導電性ボンディングパッドをさらに備えていることを特徴とする請求項18に記載のフリップチップ集積回路。
- 前記少なくとも1つの導電性ビアのそれぞれが、該導電性ビアの上部に導電材料製のプラグをさらに備えていることを特徴とする請求項27に記載のフリップチップ集積回路。
- 前記ドライブ電子回路が、受動素子及びインターコネクトを備えていることを特徴とする請求項18に記載のフリップチップ集積回路。
- 前記ドライブ電子回路が、前段増幅器及びインターコネクトを備えていることを特徴とする請求項18に記載のフリップチップ集積回路。
- 高電子移動度トランジスタ(HEMT)であって、
基板と、
該基板上に形成された高抵抗半導体層と、
該高抵抗半導体層上に形成され、該高抵抗半導体層より広いバンドギャップを有するバリア半導体層と、
前記バリア半導体層と前記高抵抗半導体層との間の2次元の電子ガスと、
それぞれ前記高抵抗半導体層上に形成され、前記バリア半導体層に接触しているソースコンタクト及びドレインコンタクトと、
前記バリア半導体層上に形成されたゲートコンタクトとを備えた高電子移動度トランジスタと、
一方の表面に形成されたドライブ電子回路と導電性ビアとを備えた回路基板とを備え、該回路基板上に前記高電子移動度トランジスタがフリップチップ実装され、前記ソースコンタクトが前記導電性ビアに電気接続し、前記ゲートコンタクト及び前記ドレインコンタクトが、前記ドライブ電子回路に電気接続していることを特徴とするフリップチップ集積回路。 - 前記高抵抗半導体層及び前記バリア半導体層が、III族窒化物半導体材料からなることを特徴とする請求項31に記載のフリップチップ集積回路。
- 前記基板が、サファイアと炭化ケイ素からなる群のいずれかの材料からなることを特徴とする請求項31に記載のフリップチップ集積回路。
- 前記回路基板の前記受動素子とは反対側の表面に導電材料層をさらに備え、該導電材料層が、前記導電性ビアに熱/電気接続していることを特徴とする請求項31に記載のフリップチップ集積回路。
- 前記高電子移動度トランジスタ及び前記受動素子からの熱を放散させるための1つ又は複数のヒートシンク用ベースプレートをさらに備えていることを特徴とする請求項31に記載のフリップチップ集積回路。
- 前記ドライブ電子回路が、前段増幅器と集積回路とを備えていることを特徴とする請求項30に記載のフリップチップ集積回路。
- ウェハ上に複数のIII族窒化物ベースの能動半導体デバイスを形成するステップと、
前記能動半導体デバイスを個々のデバイスに分離するステップと、
回路基板の表面にドライブ電子回路を形成するステップと、
前記回路基板を貫通する導電性ビアを形成するステップと、
接地部が前記導電性ビアに電気的熱的に結合している前記分離されたデバイスの1つを、前記回路基板上にフリップチップ実装するステップと
を有することを特徴とするフリップチップ集積回路の作製方法。 - 第1のウェハ上に複数のIII族窒化物ベースの能動半導体デバイスを形成するステップと、
前記能動半導体デバイスを個々のデバイスに分離するステップと、
前記第1のウェハよりも低コスト及び大径で利用可能な第2のウェハの表面に受動素子とインターコネクトとを形成するステップであって、前記受動素子及び前記インターコネクトが、前記それぞれの能動半導体デバイスをそれぞれ駆動する複数の駆動回路を形成するステップと、
前記それぞれの駆動回路のための、前記回路基板を貫通する複数の導電性ビアを形成するステップと、
接地部が前記駆動回路の導電性ビアに電気的熱的に結合されている前記能動半導体デバイスのうちの1つを、前記各駆動回路にフリップチップ実装するステップと
を有することを特徴とするフリップチップ集積回路の作製方法。
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Cited By (7)
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KR101288153B1 (ko) | 2013-07-19 |
US20110062579A1 (en) | 2011-03-17 |
EP1579509A1 (en) | 2005-09-28 |
TWI333278B (en) | 2010-11-11 |
US7851909B2 (en) | 2010-12-14 |
WO2004061973A1 (en) | 2004-07-22 |
AU2003300000A1 (en) | 2004-07-29 |
CA2511005A1 (en) | 2004-07-22 |
EP2518764A3 (en) | 2014-08-13 |
KR20110125276A (ko) | 2011-11-18 |
EP2518764B1 (en) | 2021-12-01 |
US20140362536A1 (en) | 2014-12-11 |
TW200421615A (en) | 2004-10-16 |
KR101371907B1 (ko) | 2014-03-07 |
US7354782B2 (en) | 2008-04-08 |
KR20050090438A (ko) | 2005-09-13 |
EP2518764A2 (en) | 2012-10-31 |
US8803313B2 (en) | 2014-08-12 |
CN1757119B (zh) | 2011-02-02 |
US20050067716A1 (en) | 2005-03-31 |
US6825559B2 (en) | 2004-11-30 |
KR20120124490A (ko) | 2012-11-13 |
CN1757119A (zh) | 2006-04-05 |
US9226383B2 (en) | 2015-12-29 |
US20040130037A1 (en) | 2004-07-08 |
US20120314371A1 (en) | 2012-12-13 |
US20050006669A1 (en) | 2005-01-13 |
US8274159B2 (en) | 2012-09-25 |
CA2511005C (en) | 2016-05-17 |
JP4830092B2 (ja) | 2011-12-07 |
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