JP4028538B2 - 半導体装置の製造方法およびその製造装置 - Google Patents
半導体装置の製造方法およびその製造装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 44
- 238000004519 manufacturing process Methods 0.000 title claims description 30
- 238000005121 nitriding Methods 0.000 claims description 61
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 43
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 29
- 229910052735 hafnium Inorganic materials 0.000 claims description 25
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 24
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 24
- 238000005259 measurement Methods 0.000 claims description 15
- 238000000151 deposition Methods 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 238000011282 treatment Methods 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 9
- 239000012298 atmosphere Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 238000004886 process control Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 7
- 230000008021 deposition Effects 0.000 claims description 3
- 238000000572 ellipsometry Methods 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 10
- 229910052581 Si3N4 Inorganic materials 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 9
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 150000004767 nitrides Chemical class 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- -1 nitride silicates Chemical class 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
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Description
半導体基板の表面上に、金属元素及びシリコンを有する酸化膜を堆積する工程と、
前記酸化膜の膜厚、または膜厚及び組成を測定する工程と、
前記酸化膜の膜厚とプラズマ窒化時間からシリコン酸化膜換算膜厚を求めるための予め定められたデータ、または前記酸化膜の膜厚及び組成とプラズマ窒化時間からシリコン酸化膜換算膜厚を求めるための予め定められたデータを用いて、測定された前記酸化膜の膜厚、または膜厚及び組成に基づき、所望のシリコン酸化膜換算膜厚を得るための窒化時間を含む窒化条件を設定する工程と、
設定された前記窒化条件に基づいて、前記酸化膜に窒化プラズマ雰囲気中で窒化処理を行う工程と、
を備えることを特徴とする。
半導体基板の表面上に、金属元素及びシリコンを有する酸化膜を堆積する堆積装置と、 前記酸化膜の膜厚を測定する膜厚測定装置、または前記膜厚測定装置及び前記酸化膜の組成を測定する組成測定装置と、
前記酸化膜の膜厚とプラズマ窒化時間からシリコン酸化膜換算膜厚を求めるための予め定められたデータ、または前記酸化膜の膜厚及び組成とプラズマ窒化時間からシリコン酸化膜換算膜厚を求めるための予め定められたデータを用いて、前記膜厚測定装置によって測定された前記酸化膜の膜厚、または前記膜厚測定装置及び前記組成測定装置によって測定された前記酸化膜の膜厚及び組成に基づき、所望のシリコン酸化膜換算膜厚を得るための窒化時間を含む窒化条件を設定するプロセス制御装置と、
前記プロセス制御装置によって設定された前記窒化条件に基づいて、前記酸化膜に窒化プラズマ雰囲気中で窒化処理を行う窒化装置と、
を備えることを特徴とする。
本発明の実施の形態1による半導体装置の製造方法の処理の手順を図1のフローチャートに示し、各工程における素子の縦断面を図2、図4、図5にそれぞれ示す。本実施の形態1では、ゲート絶縁膜として窒化ハフニウムシリケイト膜を用いる。
本発明の実施の形態2による半導体装置の製造装置について、その構成を示した図7を参照して説明する。
2 ハフニウムシリケイト膜
3 窒化ハフニウムシリケイト膜
4 ポリシリコン膜
11、12 半導体ウェーハ収納室
13 プラットホーム
14 膜厚測定装置
15 MOCVD測定装置
16 熱処理チャンバ
17 プラズマ窒化チャンバ
18 LPCVDチャンバ
19 組成測定装置
20 プロセス制御装置
21 アーム
Claims (6)
- 半導体基板の表面上に、金属元素及びシリコンを有する酸化膜を堆積する工程と、
前記酸化膜の膜厚、または膜厚及び組成を測定する工程と、
前記酸化膜の膜厚とプラズマ窒化時間からシリコン酸化膜換算膜厚を求めるための予め定められたデータ、または前記酸化膜の膜厚及び組成とプラズマ窒化時間からシリコン酸化膜換算膜厚を求めるための予め定められたデータを用いて、測定された前記酸化膜の膜厚、または膜厚及び組成に基づき、所望のシリコン酸化膜換算膜厚を得るための窒化時間を含む窒化条件を設定する工程と、
設定された前記窒化条件に基づいて、前記酸化膜に窒化プラズマ雰囲気中で窒化処理を行う工程と、
を備えることを特徴とする半導体装置の製造方法。 - 前記酸化膜は、ハフニウムシリケイト膜であることを特徴とする請求項1記載の半導体装置の製造方法。
- 前記酸化膜の膜厚の測定では、エリプソメトリ法または蛍光X線法を用いることを特徴とする請求項1又は2記載の半導体装置の製造方法。
- 前記酸化膜の組成の測定では、蛍光X線法を用いて行うことを特徴とする請求項1乃至3のいずれかに記載の半導体装置の製造方法。
- 半導体基板の表面上に、金属元素及びシリコンを有する酸化膜を堆積する堆積装置と、 前記酸化膜の膜厚を測定する膜厚測定装置、または前記膜厚測定装置及び前記酸化膜の組成を測定する組成測定装置と、
前記酸化膜の膜厚とプラズマ窒化時間からシリコン酸化膜換算膜厚を求めるための予め定められたデータ、または前記酸化膜の膜厚及び組成とプラズマ窒化時間からシリコン酸化膜換算膜厚を求めるための予め定められたデータを用いて、前記膜厚測定装置によって測定された前記酸化膜の膜厚、または前記膜厚測定装置及び前記組成測定装置によって測定された前記酸化膜の膜厚及び組成に基づき、所望のシリコン酸化膜換算膜厚を得るための窒化時間を含む窒化条件を設定するプロセス制御装置と、
前記プロセス制御装置によって設定された前記窒化条件に基づいて、前記酸化膜に窒化プラズマ雰囲気中で窒化処理を行う窒化装置と、
を備えることを特徴とする半導体装置の製造装置。 - 前記酸化膜は、ハフニウムシリケイト膜であることを特徴とする請求項5記載の半導体装置の製造装置。
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JP4102072B2 (ja) * | 2002-01-08 | 2008-06-18 | 株式会社東芝 | 半導体装置 |
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