JP4739292B2 - イメージセンサのウエハレベルチップスケールパッケージ及びその製造方法 - Google Patents
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Description
まず、図2を参照して、本発明の第1の実施形態に係るイメージセンサのウエハレベルチップスケールパッケージについて詳細に説明する。
図11を参照して、本発明の第2の実施形態に係るイメージセンサのウエハレベルチップスケールパッケージについて詳細に説明する。但し、第2の実施形態の構成の内、第1の実施形態と同様の部分に対する説明は省略し、第2の実施形態で変わっている構成についてのみ詳説する。
11 イメージセンサ
12 パッド
13 第1レジスト層
13a 第1レジストパターン
14 段差部
15 シードメタル層
16 第2レジスト層
16a 第2レジストパターン
17、17a 拡張パッド
18 エアキャビティ
19 支持部
20 ガラス
Claims (11)
- 上面にイメージセンサ及びパッドが備えられ、両側端部に傾斜面が備えられたウエハと、
前記パッドと電気的に接続されるように、前記パッド上から前記ウエハの傾斜面上にわたって形成され、その底面が前記ウエハの底面と同一平面上に形成された拡張パッドと、
前記拡張パッド上に形成されて、ガラスの底面の両側部を支持し、エアキャビティとなる空間を確保できる高さを有するように形成された支持部と、
前記ウエハの上部に前記エアキャビティを形成するように前記支持部上に固定されたガラスと、を含むイメージセンサのウエハレベルチップスケールパッケージ。 - 前記拡張パッドは、前記ウエハの両側端部の傾斜面の表面に沿って均一な厚さに形成されていることを特徴とする請求項1に記載のイメージセンサのウエハレベルチップスケールパッケージ。
- 前記ウエハの両側端部の傾斜面の表面に沿って均一な厚さに形成された前記拡張パッド上に、前記拡張パッドの表面の段差をなくすように形成された第2拡張パッドをさらに含むことを特徴とする請求項1または2に記載のイメージセンサのウエハレベルチップスケールパッケージ。
- 前記拡張パッドと前記ウエハとの間に形成されたシードメタル層をさらに含むことを特徴とする請求項1から3のいずれか1項に記載のイメージセンサのウエハレベルチップスケールパッケージ。
- 前記ガラスは、IRフィルタガラスであることを特徴とする請求項1から4のいずれか1項に記載のイメージセンサのウエハレベルチップスケールパッケージ。
- 上面にイメージセンサが備えられたウエハ上に等間隔にパッドを形成するステップと、
前記パッド間のスクライブラインと対応する位置で前記ウエハの上面をエッチングして、該ウエハの上面に、側面が傾斜面をなす凹な形状の段差部を形成するステップと、
前記パッドと電気的に接続されるように、前記パッド上から前記ウエハの段差部上にわたる部分に拡張パッドを形成するステップと、
前記拡張パッド上にエアキャビティとなる空間を確保できる高さの支持部を形成するステップと、
前記ウエハの上部に前記エアキャビティを形成するように、前記支持部の上面にガラスを取り付けるステップと、
前記段差部の底面に形成された前記拡張パッドの底面が露出するように、前記ウエハの下面に薄型化処理を行うステップと、
前記底面が露出した拡張パッドの中央部に沿ってダイシングを行うステップと、を含むイメージセンサのウエハレベルチップスケールパッケージの製造方法。 - 前記段差部を、50μm〜200μmの範囲の深さに形成することを特徴とする請求項6に記載のイメージセンサのウエハレベルチップスケールパッケージの製造方法。
- 前記段差部を形成するステップは、
前記ウエハ上に前記イメージセンサ及び前記パッドを覆う第1レジスト層を形成するステップと、
フォトリソグラフィ工程により前記第1レジスト層をパターニングして、前記パッド間のスクライブラインと対応する位置で前記ウエハの上面を露出させる第1レジストパターンを形成するステップと、
前記第1レジストパターンをエッチングマスクとして利用して前記ウエハの上面をエッチングすることにより、前記段差部を形成するステップと、
前記第1レジストパターンを除去するステップと、を含むことを特徴とする請求項6または7に記載のイメージセンサのウエハレベルチップスケールパッケージの製造方法。 - 前記拡張パッドを形成するステップで、
前記拡張パッドを、前記段差部の表面に沿って均一な厚さに形成することを特徴とする請求項6から8のいずれか1項に記載のイメージセンサのウエハレベルチップスケールパッケージの製造方法。 - 前記段差部の表面に沿って形成された前記拡張パッド上に、前記拡張パッドの表面の段差をなくす第2拡張パッドを形成するステップをさらに含むことを特徴とする請求項6から9のいずれか1項に記載のイメージセンサのウエハレベルチップスケールパッケージの製造方法。
- 前記拡張パッドを形成するステップは、
前記段差部の形成された前記ウエハの全面にシードメタル層を形成するステップと、
前記シードメタル層上に第2レジスト層を形成するステップと、
フォトリソグラフィ工程により前記第2レジスト層をパターニングして、前記パッド間のイメージセンサ部分を覆い、前記パッド上から前記ウエハの段差部上にわたる部分を露出させる第2レジストパターンを形成するステップと、
前記第2レジストパターンから露出した前記パッド上から前記ウエハの段差部上にわたる部分に前記拡張パッドを形成するステップと、
前記第2レジストパターン及びその下部に形成されている前記シードメタル層の部分を除去するステップと、を含むことを特徴とする請求項6から10のいずれか1項に記載のイメージセンサのウエハレベルチップスケールパッケージの製造方法。
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KR1020060098468A KR100769722B1 (ko) | 2006-10-10 | 2006-10-10 | 이미지센서의 웨이퍼 레벨 칩 스케일 패키지 및 그제조방법 |
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US9525002B2 (en) * | 2015-01-05 | 2016-12-20 | Stmicroelectronics Pte Ltd | Image sensor device with sensing surface cavity and related methods |
CN107851646A (zh) * | 2015-07-10 | 2018-03-27 | 凸版印刷株式会社 | 配线基板及其制造方法 |
JP6851773B2 (ja) | 2016-10-31 | 2021-03-31 | キヤノン株式会社 | 半導体装置 |
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US20080083965A1 (en) | 2008-04-10 |
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