JP3764450B2 - 表面弾性波素子、表面弾性波装置、表面弾性波デュプレクサ、及び表面弾性波素子の製造方法 - Google Patents
表面弾性波素子、表面弾性波装置、表面弾性波デュプレクサ、及び表面弾性波素子の製造方法 Download PDFInfo
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- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/08—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of resonators or networks using surface acoustic waves
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- H01L2224/051—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
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- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
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Description
Claims (13)
- 圧電性単結晶基板上にバッファ層を介して形成された、単結晶アルミニウムで構成され且つ表面に酸化膜を有する薄膜電極と、
前記薄膜電極上に形成された、高さ方向に延在する貫通孔を有する嵩上げ電極と、
前記嵩上げ電極上に搭載され、一部が前記貫通孔の内部に浸入し且つ前記酸化膜を貫通して前記薄膜電極まで到達して、前記薄膜電極と導通している外部接続端子とを備える、表面弾性波素子。 - 前記外部接続端子は金バンプ端子である、請求項1に記載の表面弾性波素子。
- 前記嵩上げ電極はアルミニウム又は金−アルミニウム合金で構成されている、請求項1又は2に記載の表面弾性波素子。
- 前記薄膜電極と前記嵩上げ電極との間には、これらの電極間の密着性を向上させる密着補強層が介在している、請求項1〜3のいずれか一項に記載の表面弾性波素子。
- 前記密着補強層はクロムで構成されている、請求項4に記載の表面弾性波素子。
- 前記薄膜電極と前記嵩上げ電極との間には、前記外部接続端子を構成する原子の前記薄膜電極への拡散を防止する拡散バリア層が介在している、請求項1〜5のいずれか一項に記載の表面弾性波素子。
- 前記拡散バリア層は窒化チタンで構成されている、請求項6に記載の表面弾性波素子。
- 前記バッファ層はチタン又は窒化チタンで構成されている請求項1〜7のいずれか一項に記載の表面弾性波素子。
- 前記バッファ層はチタン層及び窒化チタン層を含む少なくとも2層以上の積層構造を有する、請求項1〜8のいずれか一項に記載の表面弾性波素子。
- 前記バッファ層は、層成長面に近づくに従って、窒化チタンから次第にチタンに変化するように窒素の組成比が減少している、請求項1〜9のいずれか一項に記載の表面弾性波素子。
- 圧電性単結晶基板上にバッファ層を介して形成された、単結晶アルミニウムで構成され且つ表面に酸化膜を有する薄膜電極と、前記薄膜電極上に形成された、高さ方向に延在する貫通孔を有する嵩上げ電極と、前記嵩上げ電極上に搭載され、一部が前記貫通孔の内部に浸入し且つ前記酸化膜を貫通して前記薄膜電極まで到達して、前記薄膜電極と導通している外部接続端子と、を備える表面弾性波素子と、
前記表面弾性波素子が搭載される面に電極端子が形成されており、この電極端子と前記表面弾性波素子の前記嵩上げ電極とが前記外部接続端子を介して接続されるように、前記表面弾性波素子が搭載される実装基板とを備える、表面弾性波装置。 - 圧電性単結晶基板上にバッファ層を介して形成された、単結晶アルミニウムで構成され且つ表面に酸化膜を有する薄膜電極と、前記薄膜電極上に形成された、高さ方向に延在する貫通孔を有する嵩上げ電極と、前記嵩上げ電極上に搭載され、一部が前記貫通孔の内部に浸入し且つ前記酸化膜を貫通して前記薄膜電極まで到達して、前記薄膜電極と導通している外部接続端子と、を有する表面弾性波素子を備える、表面弾性波デュプレクサ。
- 圧電性単結晶基板上に、バッファ層を積層するステップと、
前記圧電性単結晶基板上に、前記バッファ層を介して単結晶アルミニウムで構成される電極膜を積層するステップと、
前記電極膜をパターニングして薄膜電極を形成すると共に、その薄膜電極の表面に酸化膜を形成するステップと、
前記薄膜電極上に、高さ方向に延在する貫通孔を有する嵩上げ電極を形成するステップと、
前記嵩上げ電極上に外部接続端子を圧着し、その一部を前記貫通孔に浸入させるステップと、
前記外部接続端子を振動させて、前記貫通孔に浸入した前記外部接続端子に前記薄膜電極表面の前記酸化膜を貫通させ、前記外部接続端子を前記薄膜電極まで到達させるステップとを有する表面弾性波素子の製造方法。
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US10/895,911 US7102461B2 (en) | 2003-07-28 | 2004-07-22 | Surface acoustic wave element, surface acoustic wave device, surface acoustic wave duplexer, and method of manufacturing surface acoustic wave element |
CNA2004100711508A CN1578134A (zh) | 2003-07-28 | 2004-07-28 | 声表面波元件及其制法、声表面波设备和声表面波双工器 |
DE200460002437 DE602004002437T2 (de) | 2003-07-28 | 2004-07-28 | Akustisches Oberflächenwellenelement und Herstellungsverfahren |
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