JP2022176875A - 集積回路チップ及びその形成方法 - Google Patents
集積回路チップ及びその形成方法 Download PDFInfo
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 4
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Abstract
【解決手段】ICチップにおいて、相互接続構造106は、基板の表側に設けられ、複数のボンディングワイヤ110bと、柱状構造を形成するボンディングビア112bと、を備える。ボンディングビアは、第1のボンディングワイヤから第2のボンディングワイヤまで延設される。ボンディングパッド構造102は、基板の表側の反対側の裏側に挿入され、第1のボンディングワイヤまで延設される。基板の上面に平行する面上に向かう第1又は第2のボンディングワイヤの突出部は、第1の面積を有し、この平面上に向かうボンディングビアの突出部は、第1の面積の10%以上の第2の面積を有し、ビア密度が高くなるようにする。
【選択図】図1
Description
102:ボンディングパッド構造
102b:パッド本体
102p:パッド突出部
104:柱状構造
106:相互接続構造
108:半導体基板
108bs:半導体基板の裏側
108fs:半導体基板の表側
110:ワイヤ
110b:ボンディングワイヤ
112:ワイヤ間ビア
112b:ワイヤ間ボンディングビア
114、114a、114b、114c、114d:パッシベーション層
116:層間誘電(ILD)層
118:エッチング停止層(ESL)
118l:下方エッチング停止層(ESL)
118m:中間エッチング停止層(ESL)
118u:上方エッチング停止層(ESL)
120:バッファ層
122:金属間誘電(IMD)層
122l:下方金属間誘電(IMD)層
122m:中間金属間誘電(IMD)層
122u:上方金属間誘電(IMD)層
124:パッド開口
126:裏側誘電ライナ
128:裏側誘電層
130:トレンチ隔離構造
200、400、600、700、900A、900B、1100A、1100B、1200、1500:トップレイアウト図
302:中央ワイヤ間ボンディングビア
304:周辺ワイヤ間ボンディングビア
1102:開口
1402:半導体素子
1404:ソース/ドレイン領域
1406:ゲート誘電層
1408:ゲート電極
1410:側壁スペーサ構造
1412:コンタクトビア
1502:画素アレイ
1504:画素センサ
1602:光検出器
1604:ゲート積層体
1606:フローティング拡散ノード
1608:転送トランジスタ
1610:カラーフィルタ
1612:複合格子
1614:第1の格子誘電層
1616:第2の格子誘電層
1618:格子金属層
1620:第1のICチップ
1622:第2のICチップ
1624:再配線層
1626:再配線ビア
2002、2302、2702:ワイヤ開口
2304、2704:ビア開口
3002、3902:第1のパッド開口
3302、4002:第2のパッド開口
3600、4300:ブロック図
3602、3604、3606、3608、4302、4304、4306:ブロック
A、B、C、D、E:線
CV:コンタクトビアレベル
DR:素子領域
M1:第1のワイヤレベル
M2:第2のワイヤレベル
M3:第3のワイヤレベル
M4:第4のワイヤレベル
PR:周辺領域
Sv:スペーシング
Ttw、Tw:厚さ
TM:トップワイヤレベル
TV:トップビアレベル
V0:第0のビアレベル
V1:第1のビアレベル
V2:第2のビアレベル
V3:第3のビアレベル
Wv:幅
Claims (20)
- 集積回路(IC)チップであって、
半導体基板と、
前記半導体基板の表側に設けられる相互接続構造であって、前記相互接続構造は、第1のボンディングワイヤ、第2のボンディングワイヤ、及び柱状構造を形成する1つ以上のボンディングビアを備え、前記柱状構造では、前記1つ以上のボンディングビアが、前記第1及び第2のボンディングワイヤを分離し、前記第1のボンディングワイヤから前記第2のボンディングワイヤまで延設される前記相互接続構造と、
前記半導体基板の前記表側の反対側の裏側に挿入され、前記半導体基板を通じて前記第1のボンディングワイヤまで延設されるパッド構造と、を備え、
前記半導体基板の上面に平行な面上への前記第1又は第2のボンディングワイヤの第1の突出部は、第1の面積を有し、前記平面上への前記1つ以上のボンディングビアの第2の突出部は、前記第1の面積の10%以上である第2の面積を有するICチップ。 - 前記第2の面積は、前記第1の面積の40%以上である請求項1に記載のICチップ。
- 前記第1のボンディングワイヤの厚さは、約1000オングストローム未満である請求項1又は2に記載のICチップ。
- 前記第2の突出部は、前記第1の突出部に完全に重なり合う請求項1~3のいずれか一項に記載のICチップ。
- 前記第1の突出部は、前記第1のボンディングワイヤに対応し、前記平面上への前記第2のボンディングワイヤの第3の突出部は、第3の面積を有し、前記第2の面積は、前記第3の面積の10%以上である請求項1~4のいずれか一項に記載のICチップ。
- 前記第1及び第3の突出部は、同一である請求項5に記載のICチップ。
- 前記第1及び第3の突出部は、異なる請求項5に記載のICチップ。
- 前記相互接続構造は、複数のワイヤレベルと複数のビアレベルとに各々グループ化される複数のワイヤと複数のビアとを備え、前記ワイヤレベル及び前記ビアレベルは、交互に積み重ねられ、前記複数のワイヤは、異なるワイヤレベルに前記第1及び第2のボンディングワイヤを備え、前記複数のビアは、単一のビアレベルに前記1つ以上のボンディングビアを備える請求項1~7のいずれか一項に記載のICチップ。
- 前記第1のボンディングワイヤは、前記複数のワイヤレベルのうちの前記半導体基板に最も近いワイヤレベル内にある請求項8に記載のICチップ。
- 前記半導体基板上に設けられる画素アレイと、
前記画素アレイにおいて前記半導体基板の前記表側上に設けられ、前記柱状構造に電気的に連結される半導体素子と、をさらに備える請求項8又は9に記載のICチップ。 - 集積回路(IC)チップであって、
素子領域、及び前記素子領域を包囲する周辺領域を備える基板と、
前記素子領域に設けられた半導体素子と、
前記基板上に設けられ、前記半導体素子と電気的に連結される相互接続構造であって、前記相互接続構造は、第1のワイヤ、第2のワイヤ、及び前記周辺領域に柱状構造を形成する1つ以上のビアを備え、前記1つ以上のビアは、前記第2のワイヤから延設され、界面にて前記第1のワイヤの表面と直接接触する前記相互接続構造と、
前記柱状構造と縦方向に積み重ねられ、前記柱状構造まで延設されるボンディングパッド構造と、を備え、
前記第1のワイヤの前記表面は、第1の面積を有し、前記界面は、前記第1の面積の約10%以上である第2の面積を有するICチップ。 - 前記相互接続構造は、前記基板の下方側に設けられ、前記ボンディングパッド構造は、前記基板の上側から露出し、前記ボンディングパッド構造は、前記基板を通じて前記第1のワイヤまで延設される請求項11に記載のICチップ。
- 前記1つ以上のビアは、前記第1及び第2のワイヤを分離する単一のビアのみを有し、前記単一のビアのトップレイアウトは、縁から縁まで中実の内部を備えた矩形である請求項11又は12に記載のICチップ。
- 前記1つ以上のビアは、前記第1及び第2のワイヤを分離する単一のビアのみを有し、前記単一のビアのトップレイアウトは、格子形状である請求項11又は12に記載のICチップ。
- 前記1つ以上のビアは、複数の行及び複数の列に複数のビアを備える請求項11又は12に記載のICチップ。
- 前記1つ以上のビアは、平行に長尺を有する複数の線形ビアを備える請求項11又は12に記載のICチップ。
- 前記ICチップは、3次元(3D)ICチップであり、前記基板、前記半導体素子、及び前記相互接続構造は、第1のICチップを形成し、前記ICチップは、前記第1及び第2のワイヤの下に据えられ、前記第1及び第2のワイヤと電気的に連結される第2のICチップをさらに備える請求項11~16のいずれか一項に記載のICチップ。
- 集積回路(IC)チップの形成方法であって、
基板の表側に延設されたトレンチ隔離構造を形成することと、
前記表側で前記トレンチ隔離構造に重ね合わせて、第1のボンディングワイヤ、前記第1のボンディングワイヤに重ね合わせられる第2のボンディングワイヤ、及び前記第1のボンディングワイヤから前記第2のボンディングワイヤまで延設された1つ以上のボンディングビアを備える相互接続構造を形成することと、
前記基板の前記表側の反対側の裏側から、前記トレンチ隔離構造を通じて前記第1のボンディングワイヤまで延設されるパッド構造を形成することと、を備え、
前記第1又は第2のボンディングワイヤのトップレイアウトは、第1の面積を有し、前記1つ以上のボンディングビアのトップレイアウトは、前記第1の面積の10%以上の第2の面積を有する方法。 - 前記相互接続構造は、前記基板の前記表側において半導体素子から延設されるコンタクトビアのレベルを有し、前記方法は、前記基板の前記表側において前記相互接続構造を被覆するパッシベーション層を蒸着することをさらに備え、前記第1及び第2のボンディングワイヤと、前記1つ以上のボンディングビアは、部分的に、前記コンタクトビアの前記レベルから前記パッシベーション層まで連続して延設される柱状外形を有する構造を形成する請求項18に記載の方法。
- 前記基板の前記表側において半導体素子と、前記基板から離間するように前記半導体素子から延設されるコンタクトビアと、を形成することと、
前記表側において前記半導体素子と前記コンタクトビアとを被覆する金属間誘電(IMD)層を蒸着することと、
前記IMD層をパターニングすることにより、共通の高さにて、前記トレンチ隔離構造及び前記半導体素子に各々重なり合う第1のワイヤ開口と、前記コンタクトビアを露出する第2のワイヤ開口とを形成することと、
前記第1及び第2のワイヤ開口を埋める金属層を蒸着することと、
前記金属層の上面が前記IMD層の上面と同じ高さになるまで、前記金属層に平坦化を施し、前記第1のワイヤ開口に前記第1のボンディングワイヤを形成することと、をさらに備える請求項18又は19に記載の方法。
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