JP6548377B2 - 集積回路素子及びその製造方法 - Google Patents
集積回路素子及びその製造方法 Download PDFInfo
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- 238000002955 isolation Methods 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 5
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
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- 239000010936 titanium Substances 0.000 description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 3
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- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 description 2
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
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- 229910052709 silver Inorganic materials 0.000 description 2
- -1 CuMg Inorganic materials 0.000 description 1
- 229910003336 CuNi Inorganic materials 0.000 description 1
- 229910016347 CuSn Inorganic materials 0.000 description 1
- 229910002535 CuZn Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910000673 Indium arsenide Inorganic materials 0.000 description 1
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- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 1
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- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
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- 229910052719 titanium Inorganic materials 0.000 description 1
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 1
- 229910021342 tungsten silicide Inorganic materials 0.000 description 1
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Description
本発明の集積回路素子は、TSVランディングパッドにおいて、基板に対面する表面上に形成されたTSV領域誘電膜をさらに含み、TSV領域誘電膜は、キャパシタの誘電膜と同じ物質からなる。
図1は、本発明の一実施形態による集積回路素子10の概略的な構成を例示した平面図である。
154、254・・・上部電極
156・・・誘電膜
170、270・・・TSVランディングパッド
172・・・TSV領域誘電膜
180・・・TSV
182・・・導電性プラグ
184・・・導電性バリア膜
194・・・コンタクトプラグ
254A・・・第1導電層
254B・・・第2導電層
270A・・・第1パッド層
270B・・・第2パッド層
Claims (21)
- 基板上の第1領域に形成された電極を含むキャパシタと、
前記基板上の第2領域に形成され、前記電極と同じ物質からなるTSV(through−silicon−via)ランディングパッドと、
前記キャパシタ及び前記TSVランディングパッドの上に形成された多層配線と、
前記基板を貫通し、前記TSVランディングパッドを介して、前記多層配線に連結されたTSVと、を含み、
前記TSVランディングパッドは、前記基板に対面する表面上に形成されたTSV領域誘電膜をさらに含み、
前記TSV領域誘電膜は、前記キャパシタの誘電膜と同じ物質からなることを特徴とする集積回路素子。 - 前記キャパシタは、前記基板の活性領域に連結される下部電極と、前記下部電極上に形成された上部電極と、前記下部電極と前記上部電極との間に介在された誘電膜と、を含み、
前記TSVランディングパッドは、前記上部電極と同じ物質からなることを特徴とする請求項1に記載の集積回路素子。 - 前記基板上の第1領域において、前記基板と前記キャパシタとの間に形成されたビットラインをさらに含み、
前記TSVランディングパッドの厚みは、前記ビットラインの厚みよりさらに厚いことを特徴とする請求項1に記載の集積回路素子。 - 前記TSVランディングパッドは、単一層からなることを特徴とする請求項1に記載の集積回路素子。
- 前記TSVランディングパッドは、少なくとも2層の導電層が積層された多重層からなることを特徴とする請求項1に記載の集積回路素子。
- 前記電極及び前記TSVランディングパッドは、それぞれ非金属伝導物質を含むことを特徴とする請求項1に記載の集積回路素子。
- 前記電極及び前記TSVランディングパッドは、それぞれ非金属伝導物質からなる第1導電層と、金属を含む第2導電層と、を含み、
前記第1導電層は、前記基板からの距離が前記第2導電層より近いことを特徴とする請求項1に記載の集積回路素子。 - 前記第1導電層は、前記基板と前記第2導電層との間に介在されたことを特徴とする請求項7に記載の集積回路素子。
- 前記TSVは、前記TSVランディングパッドに接する上面を有し、
前記上面の一部と前記TSVランディングパッドとが接することを特徴とする請求項1に記載の集積回路素子。 - 前記TSVランディングパッドの少なくとも一部は、メッシュパターンからなることを特徴とする請求項1に記載の集積回路素子。
- 前記TSVランディングパッドの少なくとも一部は、互いに離隔された複数のパターンからなることを特徴とする請求項1に記載の集積回路素子。
- 前記多層配線に含まれるいずれか1本の配線と、前記TSVランディングパッドとの間に連結されたコンタクトプラグと、をさらに含み、
メモリセル領域において、前記上部電極の一部は、前記TSVランディングパッドの厚みと同じ厚みを有することを特徴とする請求項2に記載の集積回路素子。 - 基板上の第1領域にキャパシタ下部電極を形成する段階と、
前記キャパシタ下部電極の表面を覆う誘電膜を形成する段階と、
前記誘電膜を介在させ、前記キャパシタ下部電極を覆い、前記第1領域と、前記第1領域に接した第2領域とに形成される上部電極層を形成する段階と、
前記上部電極層をパターニングし、前記第1領域には、キャパシタ上部電極を形成し、前記第2領域では、TSVランディングパッドを形成する段階と、
前記第2領域において、前記基板を貫通し、前記TSVランディングパッドに連結されるTSVを形成する段階と、を含み、
前記上部電極層を形成する段階は、前記第1領域及び前記第2領域において、前記基板上に非金属からなる導電層を形成する段階を含むことを特徴とする集積回路素子の製造方法。 - 前記上部電極層を形成する段階は、
前記第1領域及び前記第2領域において、前記基板上に非金属からなる第1導電層を形成する段階と、
前記第1領域及び前記第2領域において、前記第1導電層上に金属を含む第2導電層と前記基板との間に前記第1導電層が介在されるように第2導電層を形成する段階と、
を含むことを特徴とする請求項13に記載の集積回路素子の製造方法。 - 前記TSVランディングパッドは、非金属からなる第1導電層を含み、
前記TSVを形成する段階は、
前記基板の一部をエッチングし、前記第1導電層を露出させるビアホールを形成する段階と、
前記ビアホール内で、前記第1導電層に直接接する前記TSVを形成する段階と、を含
むことを特徴とする請求項13に記載の集積回路素子の製造方法。 - 前記TSVランディングパッドを形成した後、前記TSVを形成する前に、前記キャパシタ上部電極に連結される第1配線層と、前記TSVランディングパッドに連結される少なくとも1層の第2配線層と、を含む多層配線を形成する段階をさらに含むことを特徴とする請求項13に記載の集積回路素子の製造方法。
- 前記TSVランディングパッドを形成した後、前記多層配線を形成する前に、前記TSVランディングパッドにそれぞれ連結され、互いに離隔された複数のコンタクトプラグを形成する段階をさらに含み、
前記少なくとも1層の第2配線層は、前記複数のコンタクトプラグに連結されるように形成されることを特徴とする請求項16に記載の集積回路素子の製造方法。 - 基板のメモリセルアレイ領域において、前記基板の活性領域に連結されるキャパシタ下部電極を形成する段階と、
前記基板のメモリセルアレイ領域において、前記キャパシタ下部電極を覆い、前記基板のTSV領域まで延長される誘電膜を前記基板上に形成する段階と、
前記基板のメモリセルアレイ領域及び前記TSV領域において、前記誘電膜上に上部電極層を形成する段階と、
前記上部電極層をパターニングし、前記メモリセルアレイ領域では、前記誘電膜の一部を介在させ、前記キャパシタ下部電極を覆うキャパシタ上部電極を形成し、前記TSV領域では前記誘電膜の他の一部を覆うTSVランディングパッドを形成する段階と、
前記TSV領域において、前記基板を貫通し、前記TSVランディングパッドに連結されるTSVを形成する段階と、
を含むことを特徴とする集積回路素子の製造方法。 - 前記メモリセルアレイ領域において、前記基板上に第1厚みを有するビットラインを形成する段階をさらに含み、
前記上部電極層は、前記第1厚みよりさらに厚い第2厚みを有することを特徴とする請求項18に記載の集積回路素子の製造方法。 - 前記上部電極層をパターニングする段階において、少なくとも一部がメッシュパターンからなる前記TSVランディングパッドを形成することを特徴とする請求項18に記載の集積回路素子の製造方法。
- 前記上部電極層をパターニングする段階において、少なくとも一部が互いに離隔された複数のパターンからなる前記TSVランディングパッドを形成することを特徴とする請求項18に記載の集積回路素子の製造方法。
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