JP2022515286A - 集積回路i/oの完全性および劣化監視 - Google Patents
集積回路i/oの完全性および劣化監視 Download PDFInfo
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Abstract
Description
本出願は、2018年12月30日に出願された「INTEGRATED CIRCUIT PAD FAILURE DETECTION」と題された米国仮特許出願第62/786,460号の優先権の利益を主張し、その内容はすべて参照によりその全体が本明細書に組み込まれる。
Claims (40)
- 半導体集積回路(IC)のための入力/出力(I/O)ブロックであって、
少なくとも1つのI/Oバッファであって、通信チャネルを介したリモートI/Oブロックへの接続に関する少なくとも1つの信号経路を定義するように構成されており、各信号経路が、それぞれの信号エッジスロープを引き起こす、I/Oバッファと、
I/Oセンサであって、前記少なくとも1つの信号経路に結合されており、
(a)前記少なくとも1つの信号経路の第1の信号経路のための前記信号エッジスロープと、前記少なくとも1つの信号経路の第2の、異なる信号経路のための前記信号エッジスロープとの間のタイミング差、および
(b)前記少なくとも1つの信号経路のうちの1つ以上に関するアイパターンパラメータ、のうちの少なくとも1つを示す出力信号を生成するよう構成されているI/Oセンサと、を備える、I/Oブロック。 - 前記少なくとも1つのI/Oバッファが、送信バッファを備え、前記少なくとも1つの信号経路が、前記通信チャネルに結合されている前記送信バッファの出力に結合された第1の信号経路を備える、請求項1に記載のI/Oブロック。
- 前記第1の信号経路が、少なくとも1つの接続バンプを介して前記リモートI/Oブロックにさらに結合され、前記I/Oセンサの前記出力信号が、前記少なくとも1つの接続バンプの品質をさらに示す、請求項2に記載のI/Oブロック。
- 前記少なくとも1つの信号経路が、第2の接続バンプを介して前記リモートI/Oブロックに結合されている第3の信号経路と、第4の信号経路と、を備え、前記I/Oセンサは、前記第3および/または第4の信号経路に結合され、前記I/Oセンサの前記出力信号が、前記第1の接続バンプおよび前記第2の接続バンプの品質を示すような、前記第3の信号経路の前記信号エッジと前記第4の信号経路の前記信号エッジとの間のタイミング差、ならびに前記第3の信号経路および/または前記第4の信号経路のためのアイパターンパラメータのうちの一方または両方をさらに示す前記出力信号を生成するように構成されている、請求項3に記載のI/Oブロック。
- 前記少なくとも1つの信号経路が、前記送信バッファの入力に結合された信号経路、および/または相互接続および前記送信バッファと前記相互接続間の接続バンプを介して前記リモートI/Oブロックに結合されている信号経路を備え、前記I/Oセンサの前記出力信号が、前記接続バンプの品質をさらに示す、請求項2~4のいずれか1項に記載のI/Oブロック。
- 差分バッファであって、前記通信チャネルに結合された経路で受信された差動バッファ入力信号と、固定レベル信号と、の間の差を出力するように構成された差分バッファをさらに備え、前記少なくとも1つの信号経路の信号経路は前記差動バッファの前記出力に結合されている、請求項1~5のいずれか1項に記載のI/Oブロック。
- 前記固定レベル信号が、前記ICに対する直流電源電圧の所定の割合で固定された電圧であり、任意選択的に、前記所定の割合が動的に調整され、および/または前記所定の割合が75%である、請求項6に記載のI/Oブロック。
- 前記少なくとも1つのI/Oバッファが、前記通信チャネルに結合された入力を有する受信バッファを備え、前記少なくとも1つの信号経路のうちの1つの信号経路が前記受信バッファの出力に結合されている、請求項1~7のいずれか1項に記載のI/Oブロック。
- 前記受信バッファへの前記入力が、相互接続と、前記相互接続とリモートI/Oブロックとの間の接続バンプと、を介して前記リモートI/Oブロックに結合され、前記I/Oセンサの前記出力信号が前記接続バンプの品質をさらに示す、請求項8に記載のI/Oブロック。
- 前記通信チャネルが、2つの信号線を介して差動信号を伝送するように構成され、前記少なくとも1つの信号経路の第1の信号経路が、第1の信号線に結合されており、前記少なくとも1つの信号経路の第2の信号経路が、第2の信号線に結合されている、請求項1~9のいずれか1項に記載のI/Oブロック。
- 前記少なくとも1つのI/Oバッファが、前記2つの信号線を介して差動出力を提供するように構成された送信バッファを備え、前記第1の信号経路が、前記第1の信号線に結合されている前記送信バッファの第1の出力に結合されており、前記第2の信号経路が、前記第2の信号線に結合されている前記送信バッファの第2の出力に結合されている、請求項10に記載のI/Oブロック。
- 前記第1の信号線が、第1の近端接続バンプを介して前記送信バッファに結合された第1の相互接続を備え、前記第2の信号線が、第2の近端接続バンプを介して前記送信バッファに結合された第2の相互接続を備え、前記I/Oセンサの前記出力信号が、前記第1および第2の近端接続バンプの品質をさらに示す、請求項11に記載のI/Oブロック。
- 前記第1の信号線が、第1の遠端接続バンプを介して前記リモートI/Oブロックに結合された第1の相互接続を備え、前記第2の信号線が、第2の遠端接続バンプを介して前記リモートI/Oブロックに結合された第2の相互接続を備え、前記I/Oセンサの前記出力信号が、前記第1および第2の遠端接続バンプの品質をさらに示す、請求項10~12のいずれか1項に記載のI/Oブロック。
- 前記I/Oセンサが、
第1の信号経路のための第1のオプションに結合された第1の入力ポートと、
前記第1の信号経路のための第2のオプションに結合された第2の入力ポートと、
第2の信号経路に結合された第3の入力ポートと、
セレクタであって、前記I/Oセンサの前記出力信号が、前記第2の信号経路の前記信号エッジと、前記第1の信号経路のための前記第1のオプションまたは前記第1の信号経路のための第2のオプションのいずれか1つのための前記信号エッジと、の間のタイミング差を選択的に示すように、受信された選択信号に応答して、前記第1または前記第2の入力ポートを選択するように構成された、セレクタと、を含む、請求項1~13のいずれか1項に記載のI/Oブロック。 - 前記通信チャネルに結合された信号経路で受信された第1の信号と、第2の固定レベル信号と、の間の差を出力するように構成されている差動バッファをさらに備え、前記第3の入力ポートは、前記差動バッファの前記出力に結合されている、請求項14に記載のI/Oブロック。
- 前記少なくとも1つのI/Oブロックが、
送信バッファであって、前記第1の入力ポートが、前記通信チャネルに結合された前記送信バッファの出力に結合されている、送信バッファと、
前記通信チャネルに結合された入力を有する受信バッファであって、前記第2の入力ポートが、前記受信バッファの出力に結合されている、受信バッファと、のいずれか一方または両方を備える、請求項14または15に記載のI/Oブロック。 - 前記アイパターンパラメータが、アイ幅、アイ高、アイ幅のジッタ、およびアイ高の変動のうちの1つ以上を含む、請求項1~16のいずれか1項に記載のI/Oブロック。
- 前記出力信号が、前記第1の信号経路の前記信号エッジと前記第2の信号経路の前記信号エッジとの間のタイミング差、または前記アイパターンパラメータ、のいずれかを示す幅を有するパルスを含む、請求項1~17のいずれか1項に記載のI/Oブロック。
- 前記I/Oセンサの前記出力信号に基づいて、前記少なくとも1つのI/Oバッファのパラメータを調整するように構成されたパフォーマンスオプティマイザ、および/または、
前記I/Oセンサの前記出力信号に基づいて、前記I/Oバッファの構成を調整するように構成された修復コントローラ、をさらに備える、請求項1~18のいずれか1項に記載のI/Oブロック。 - 前記修復コントローラが、前記I/Oセンサの前記出力信号に応答して、前記ICの一部または全体を無効にすること、前記ICの少なくとも一部のレーン再マッピングを引き起こすこと、ならびに前記IC内の送信バッファ強度を調整すること、のうちの1つ以上を行うように構成されている、請求項19に記載のI/Oブロック。
- 前記修復コントローラが、前記ICの初期動作時および/または前記ICの通常動作中に動作するように構成され、および/または前記調整が、前記ICの瞬間温度および/または前記ICの電圧に基づいてさらに行われる、請求項19または20に記載のI/Oブロック。
- 前記I/Oセンサの前記出力信号から得られたタイミング信号を受信し、前記タイミング信号に基づいてデジタル時間信号を提供するように構成されている、時間-デジタル変換器をさらに備える、請求項1~21のいずれか1項に記載のI/Oブロック。
- 請求項1~22のいずれか1項に記載の前記I/Oブロックを含む、半導体集積回路(IC)。
- 前記I/Oセンサは、前記ICの外部で前記出力信号を通信するように構成されている、請求項23に記載の半導体IC。
- フィルタされたカウンタブロックであって、
前記I/Oセンサの前記出力信号に基づいて時間信号を受信し、受信した前記時間信号を閾値と比較し、前記比較に基づいて、前記I/Oセンサからの例外的読み出しまたは外れ値読み出しを識別するように構成されている、フィルタされたカウンタブロックをさらに備える、請求項23または24に記載の半導体IC。 - 前記フィルタされたカウンタブロックは、前記I/Oセンサからの正常な読み出しの数および/または前記I/Oセンサからの例外的読み出しまたは外れ値読み出しの数をカウントするようにさらに構成されている、請求項25に記載の半導体IC。
- 半導体ICシステムであって、請求項23~26のいずれか1項に記載の半導体ICを備え、
前記I/Oセンサの出力信号に基づいて、I/Oプロファイルおよび/または分類を生成するように構成されている、I/Oプロファイリング部、ならびに、
前記I/Oセンサの前記出力信号に基づいて、前記半導体ICのピンに対する信号振幅および/または信号スルーレートを判定および/または特性化するようにさらに構成されている、組み込み仮想視野(EVS)部、のうちの少なくとも1つをさらに備える、半導体ICシステム。 - 前記少なくとも1つの信号経路のうちの1つ以上が、少なくとも1つの接続バンプを介して前記リモートI/Oブロックにさらに結合されており、前記I/Oプロファイルおよび/または前記分類が、前記I/Oセンサの前記出力信号を経時的に監視することに基づく、請求項27に記載の半導体ICシステム。
- 前記I/Oプロファイリング部が、
前記I/Oプロファイルおよび/または前記分類を、前記半導体ICのファミリーデータと比較することと、
前記I/Oプロファイルおよび/または前記分類に基づいて体系的なシフトを検出することと、
テスタデータに基づいて外れ値を検出することと、のうちの1つ以上を実施するようにさらに構成されている、請求項28に記載の半導体ICシステム。 - 半導体集積回路(IC)の入力/出力(I/O)ブロックを監視するための方法であって、前記I/Oブロックは、通信チャネルを介したリモートI/Oブロックへの接続に関する少なくとも1つの信号経路を定義する少なくとも1つのI/Oバッファを備え、各信号経路はそれぞれの信号エッジスロープを引き起こし、前記方法は、
I/Oセンサにおいて、(a)第1の信号経路の前記信号エッジと第2の異なる信号経路の前記信号エッジとの間のタイミング差と、(b)前記少なくとも1つの信号経路のうちの1つ以上のアイパターンパラメータと、のうちの一方または両方を示す出力信号を生成することを含む、方法。 - 前記I/Oブロックが、請求項2~25のいずれか1項に従う、請求項30に記載の方法。
- 前記I/Oセンサの前記出力信号に基づいて、前記少なくとも1つのI/Oバッファのパラメータを調整することと、
前記I/Oセンサの前記出力信号に基づいて、前記I/Oバッファの構成を調整することと、をさらに含む、請求項30または31に記載の方法。 - 前記I/Oセンサの前記出力信号に応答して、前記ICの一部または全体を無効にすること、前記I/Oセンサの前記出力信号に応答して、前記ICの少なくとも一部のレーン再マッピングを引き起こすこと、および前記I/Oセンサの前記出力信号に応答して、送信バッファ強度を調整すること、のうちの1つ以上をさらに含む、請求項32に記載の方法。
- 前記調整のステップが、前記ICの瞬間温度および/または前記ICの電圧にさらに基づく、請求項32~33のいずれか1項に記載の方法。
- 前記I/Oセンサの前記出力信号に基づいて、I/Oプロファイルおよび/または分類を生成することをさらに含む、請求項30~34のいずれか1項に記載の方法。
- 前記少なくとも1つの信号経路のうちの1つ以上が、少なくとも1つの接続バンプを介して前記リモートI/Oブロックにさらに結合されており、前記I/Oプロファイルおよび/または前記分類が、前記I/Oセンサの前記出力信号を経時的に監視することに基づく、請求項35に記載の方法。
- 前記I/Oプロファイルおよび/または前記分類を、前記半導体ICのファミリーデータと比較すること、
前記I/Oプロファイルおよび/または前記分類に基づいて系統的推移を検出すること、および
テスタデータに基づいて外れ値を検出すること、のうちの1つ以上をさらに含む、請求項35または36に記載の方法。 - 前記I/Oセンサの前記出力信号に基づく時間信号を、閾値と比較することと、
前記比較に基づいて、前記I/Oセンサからの例外的または外れ値読み出し値を識別することと、をさらに含む、請求項30~37のいずれか1項に記載の方法。 - 前記I/Oセンサからの正常な読み出しの数、および/または前記I/Oセンサからの例外的読み出しまたは外れ値読み出しの数をカウントすることをさらに含む、請求項38に記載の方法。
- 非一時的なコンピュータ可読媒体であって、命令がプロセッサによって実施されるときに、請求項30~39のいずれか1項に記載の方法を実行するための、記憶された前記命令を有する、非一時的なコンピュータ可読媒体。
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