JP2012093355A - 被試験デバイスの分析のためのシステムおよび被試験デバイスをテストする方法 - Google Patents
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Abstract
【解決手段】制御された量の熱が光ビームを用いてスタックダイ中に注入され、伝搬された熱は、ダイの反対側からLITカメラで測定される。得られた熱画像は、既知のスタックレイヤからの位相シフトを較正するのに用いられるよう、またはスタックダイ中の欠陥を特定するのに用いられるよう、その特性が得られる。本プロセスは、将来のテストのためのレファレンスを生成するために、スタックの中のそれぞれのダイについて繰り返され得る。
【選択図】図1
Description
Claims (20)
- 被試験デバイス(DUT)の分析のためのシステムであって、
前記DUTを支持するためのテストベンチと、
所定量のエネルギーを前記DUT上の局所的なスポットに、前記DUTの一方の側から届けるよう配置された熱源と、
前記DUTの他方の側を画像化するよう配置された熱画像化システムと、
前記熱源を動作させることによって、前記所定量のエネルギーを送り、前記熱画像化システムから出力信号を受け取るコントローラと
を備えるシステム。 - 前記熱源は光源を備える、請求項1に記載のシステム。
- 前記光源はレーザ光源である、請求項2に記載のシステム。
- 前記コントローラは、前記光源をロックイン周波数f1で動作させ、前記熱画像化システムをロックイン周波数f2で動作させる、請求項2に記載のシステム。
- ロックイン周波数f2は、ロックイン周波数f1の少なくとも4倍である、請求項4に記載のシステム。
- 前記熱画像化システムは、赤外カメラを備える、請求項5に記載のシステム。
- 前記熱源はさらに
可動ステージと、
前記可動ステージに結合された光学スキャナであって、前記光学スキャナは、前記光源の出力を受け取り、前記出力を前記DUT上の特定のスポットへ導く、光学スキャナと、
前記出力を前記DUT上の前記特定のスポットへ収束させる対物レンズと
を備える請求項6に記載のシステム。 - 被試験デバイス(DUT)の分析のためのシステムであって、
前記DUTを支持するためのテストベンチと、
ロックイン周波数f1において動作し、前記DUT上にパルスレーザ光ビームを前記DUTの一方の側から届けるよう配置されたロックインレーザ光源と、
ロックイン周波数f2で動作し、前記DUTの他方の側を画像化するよう配置されたロックインサーマル画像化システムと、
前記ロックイン周波数f1で前記光源を動作させ、前記ロックイン周波数f2で前記サーマル画像化システムを動作させるコントローラと
を備えるシステム。 - 前記コントローラは、ロックイン周波数f1のトリガ信号を前記ロックインレーザ光源に出力し、ロックイン周波数f2のトリガ信号を前記ロックインサーマル画像化システムに出力する、請求項8に記載のシステム。
- ロックイン周波数f2は、ロックイン周波数f1の少なくとも4倍である、請求項9に記載のシステム。
- 前記ロックインレーザ光源は、
前記ロックイン周波数f1のトリガ信号を受け取り、パルスレーザ光ビームを発生する励起源と、
前記パルスレーザ光ビームを受け取り、前記DUT上の指定された位置に導くスキャンユニットと、
前記指定された位置上に前記パルスレーザ光ビームを収束させる対物レンズと
を備える請求項8に記載のシステム。 - 前記ロックイン熱画像化システムは、赤外カメラを備える、請求項11に記載のシステム。
- 被試験デバイス(DUT)をテストする方法であって、
前記DUTをテストベンチ上に配置することと、
前記DUTの一方の側に指定されたスポットを照射することと、
前記DUTの他方の側の熱画像を得ることと、
前記熱画像を分析することによって、前記DUT内の熱の熱伝搬の特性を求めること
を含む方法。 - 指定されたスポットを照射することは、一連の周波数f1のレーザ光パルスを伝えることを含む、請求項13に記載の方法。
- 熱画像を取得することは、周波数f2において一連の画像を取得することを含む、請求項14に記載の方法。
- 周波数f1およびf2を同期させることをさらに含む請求項15に記載の方法。
- ロックイン周波数f2は、ロックイン周波数f1の少なくとも4倍である、請求項16に記載のシステム。
- 前記一連のパルスを前記DUT内の所定の深さに収束させることをさらに含む請求項14に記載の方法。
- 前記指定されたスポットは、少なくとも1つのシリコン貫通ビア(TSV)を含み、
前記熱画像をレファレンス熱画像と比較することによって、前記TSV中の欠陥を調べることをさらに含む、請求項14に記載の方法。 - 前記DUTのさまざまなレイヤ内の熱の熱伝搬のレファレンスデータベースを組み立てることをさらに含む、請求項14に記載の方法。
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Also Published As
Publication number | Publication date |
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JP6367871B2 (ja) | 2018-08-01 |
SG180133A1 (en) | 2012-05-30 |
JP2016188874A (ja) | 2016-11-04 |
US9098892B2 (en) | 2015-08-04 |
EP2444795A1 (en) | 2012-04-25 |
TW201229504A (en) | 2012-07-16 |
US20140210994A1 (en) | 2014-07-31 |
TWI460422B (zh) | 2014-11-11 |
US9025020B2 (en) | 2015-05-05 |
US20150338458A1 (en) | 2015-11-26 |
US20120098957A1 (en) | 2012-04-26 |
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