JP2008091905A - FinFETを備えた半導体素子の製造方法 - Google Patents
FinFETを備えた半導体素子の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 238000002955 isolation Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 238000005530 etching Methods 0.000 claims abstract description 17
- 230000004888 barrier function Effects 0.000 claims abstract description 13
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 36
- 229920005591 polysilicon Polymers 0.000 claims description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 31
- 229910052799 carbon Inorganic materials 0.000 claims description 31
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 30
- 229910052710 silicon Inorganic materials 0.000 claims description 30
- 239000010703 silicon Substances 0.000 claims description 30
- 230000002093 peripheral effect Effects 0.000 claims description 16
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 15
- 229910052796 boron Inorganic materials 0.000 claims description 15
- 239000012535 impurity Substances 0.000 claims description 11
- 150000004767 nitrides Chemical class 0.000 claims description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910003481 amorphous carbon Inorganic materials 0.000 claims description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 2
- 239000012212 insulator Substances 0.000 claims 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical group [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 229920002120 photoresistant polymer Polymers 0.000 description 19
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 238000005468 ion implantation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
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Abstract
【解決手段】半導体基板21に、隣接するアクティブ領域23を画定する素子分離膜22を形成するステップと、アクティブ領域パターン29Bが形成される領域を露出させ、該領域間の素子分離膜22を覆うハードマスクパターンを形成するステップと、該ハードマスクパターンをエッチングバリアとして、露出された前記領域の素子分離膜22に選択的にリセス29Aを形成し、アクティブ領域パターン29Bを形成するステップと、前記ハードマスクパターンを除去するステップと、半導体基板21上にゲート絶縁膜を形成するステップと、該ゲート絶縁膜上に、アクティブ領域パターン29Bを覆うゲート電極を形成するステップとを含む。
【選択図】図3H
Description
を含むことを特徴とする。
22 フィールド酸化膜
23 アクティブ領域
24A 炭素系ハードマスクパターン
25A 酸化物系ハードマスクパターン
26A シリコン系ハードマスクパターン
27 第1フォトレジストパターン
28 第2フォトレジストパターン
29B フィンアクティブ領域パターン
30 ゲート絶縁膜
31 P型ポリシリコン
31A N型ポリシリコン
Claims (24)
- 半導体基板に、アクティブ領域を画定する素子分離膜を形成するステップと、
前記アクティブ領域のうち、アクティブ領域パターンが形成される領域を露出させ、該アクティブ領域パターンが形成されるこれらの領域間の前記素子分離膜を覆うハードマスクパターンを形成するステップと、
該ハードマスクパターンをエッチングバリアとして、露出された前記領域の素子分離膜に選択的にリセスを形成し、前記アクティブ領域パターンを形成するステップと、
前記ハードマスクパターンを除去するステップと、
前記アクティブ領域パターンが形成された前記半導体基板上にゲート絶縁膜を形成するステップと、
該ゲート絶縁膜上に、少なくとも前記アクティブ領域パターンを覆うゲート電極を形成するステップと
を含むことを特徴とする半導体素子の製造方法。 - 前記アクティブ領域パターンが、フィンアクティブ領域パターンを含むことを特徴とする請求項1に記載の半導体素子の製造方法。
- 前記ハードマスクパターンの一部が、
相互に隣接する前記アクティブ領域の対向する端部と、これらの端部間の素子分離膜とを覆う形状に形成されることを特徴とする請求項1に記載の半導体素子の製造方法。 - 前記ハードマスクパターンを形成する前記ステップが、三層構造のハードマスクパターンを形成するステップであることを特徴とする請求項3に記載の半導体素子の製造方法。
- 前記三層構造のハードマスクパターンを形成する前記ステップが、
炭素系ハードマスクと酸化物系ハードマスクとを順次形成するステップと、
該酸化物系ハードマスク上に、直線状パターンのシリコン系ハードマスクパターンを形成するステップと、
該シリコン系ハードマスクパターン上に、相互に隣接する前記アクティブ領域の対向する端部と、これらの端部間の素子分離膜とを覆う島状のマスクパターンを形成するステップと、
該島状のマスクパターン及び前記シリコン系ハードマスクパターンをエッチングバリアとして、前記酸化物系ハードマスクと前記炭素系ハードマスクとを順次エッチングするステップと
を含むことを特徴とする請求項4に記載の半導体素子の製造方法。 - 前記シリコン系ハードマスクパターンを形成する前記ステップが、
前記酸化物系ハードマスク上にシリコン系ハードマスクを形成するステップと、
該シリコン系ハードマスク上に、直線状パターンのリセスマスクを形成するステップと、
直線状パターンの該リセスマスクをエッチングバリアとして、前記シリコン系ハードマスクをエッチングし、前記シリコン系ハードマスクパターンを形成するステップと、
前記リセスマスクを除去するステップと
を含むことを特徴とする請求項5に記載の半導体素子の製造方法。 - 前記炭素系ハードマスクが、非晶質炭素で形成されることを特徴とする請求項5に記載の半導体素子の製造方法。
- 前記炭素系ハードマスクが、1000Å〜2000Åの範囲の厚さに形成されることを特徴とする請求項7に記載の半導体素子の製造方法。
- 前記炭素系ハードマスクと前記半導体基板との間に、100Å未満の厚さの酸化膜をさらに形成することを特徴とする請求項5に記載の半導体素子の製造方法。
- 前記酸化物系ハードマスクが、シリコン酸窒化物又はシリコン酸化物で形成されることを特徴とする請求項5に記載の半導体素子の製造方法。
- 前記酸化物系ハードマスクが、200Å〜600Åの範囲の厚さに形成されることを特徴とする請求項10に記載の半導体素子の製造方法。
- 前記シリコン系ハードマスクが、非晶質シリコン又は多結晶シリコンで形成されることを特徴とする請求項5に記載の半導体素子の製造方法。
- 前記シリコン系ハードマスクが、200Å〜400Åの範囲の厚さに形成されることを特徴とする請求項12に記載の半導体素子の製造方法。
- 前記ゲート絶縁膜が、窒化絶縁物で形成されることを特徴とする請求項1に記載の半導体素子の製造方法。
- 前記窒化絶縁物が、SiON又はHfSiONであることを特徴とする請求項14に記載の半導体素子の製造方法。
- 前記ゲート電極が、P型不純物がドープされたポリシリコンで形成されることを特徴とする請求項1に記載の半導体素子の製造方法。
- 前記P型不純物が、ホウ素であることを特徴とする請求項16に記載の半導体素子の製造方法。
- 前記ホウ素の濃度が、1019atoms/cm3〜1021atoms/cm3の範囲の値であることを特徴とする請求項17に記載の半導体素子の製造方法。
- 前記ポリシリコンが、500Å〜1500Åの範囲の厚さに形成されることを特徴とする請求項16に記載の半導体素子の製造方法。
- 前記半導体基板において、前記フィンアクティブ領域パターンが形成されるセル領域と、平面状のアクティブ領域が形成される周辺回路領域とが画定され、
前記ゲート電極を形成する前記ステップが、
P型不純物がドープされたP型ポリシリコンを形成するステップと、
前記周辺回路領域の前記P型ポリシリコンの一部にN型不純物をドープするステップと
を含むことを特徴とする請求項1〜15のいずれか1項に記載の半導体素子の製造方法。 - 前記周辺回路領域が第1のNMOS領域とPMOS領域とに区分され、
前記セル領域が第2のNMOS領域であり、
前記第1のNMOS領域の前記P型ポリシリコンに前記N型不純物がドープされることを特徴とする請求項20に記載の半導体素子の製造方法。 - 前記P型不純物がホウ素であり、前記N型不純物がリン(Phosphorus)であることを特徴とする請求項21に記載の半導体素子の製造方法。
- 前記ホウ素の濃度が、1019atoms/cm3〜1021atoms/cm3の範囲の値であることを特徴とする請求項22に記載の半導体素子の製造方法。
- 前記P型ポリシリコンが、500Å〜1500Åの範囲の厚さに形成されることを特徴とする請求項20に記載の半導体素子の製造方法。
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KR1020060096463A KR100801315B1 (ko) | 2006-09-29 | 2006-09-29 | 돌기형트랜지스터가 구비된 반도체소자의 제조 방법 |
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US (1) | US7915108B2 (ja) |
JP (1) | JP2008091905A (ja) |
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CN (1) | CN100570840C (ja) |
TW (1) | TWI329345B (ja) |
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JP5555211B2 (ja) * | 2011-09-06 | 2014-07-23 | 株式会社東芝 | 半導体装置及びその製造方法 |
US8629038B2 (en) | 2012-01-05 | 2014-01-14 | Taiwan Semiconductor Manufacturing Company, Ltd. | FinFETs with vertical fins and methods for forming the same |
US8722494B1 (en) | 2012-11-01 | 2014-05-13 | International Business Machines Corporation | Dual gate finFET devices |
US9735275B2 (en) | 2015-12-18 | 2017-08-15 | International Business Machines Corporation | Channel replacement and bimodal doping scheme for bulk finFET threshold voltage modulation with reduced performance penalty |
KR20180097763A (ko) | 2016-01-20 | 2018-08-31 | 어플라이드 머티어리얼스, 인코포레이티드 | 측방향 하드마스크 리세스 감소를 위한 하이브리드 탄소 하드마스크 |
CN107622940B (zh) * | 2017-09-01 | 2019-09-27 | 中国科学院上海技术物理研究所 | 一种易去胶的高能离子注入多层掩膜的制备方法 |
US10431686B1 (en) * | 2018-09-10 | 2019-10-01 | Qualcomm Incorporated | Integrated circuit (IC) employing a channel structure layout having an active semiconductor channel structure(s) and an isolated neighboring dummy semiconductor channel structure(s) for increased uniformity |
WO2021119000A1 (en) * | 2019-12-09 | 2021-06-17 | Entegris, Inc. | Diffusion barriers made from multiple barrier materials, and related articles and methods |
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Also Published As
Publication number | Publication date |
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US20080081405A1 (en) | 2008-04-03 |
CN100570840C (zh) | 2009-12-16 |
TW200816325A (en) | 2008-04-01 |
TWI329345B (en) | 2010-08-21 |
CN101154596A (zh) | 2008-04-02 |
US7915108B2 (en) | 2011-03-29 |
KR100801315B1 (ko) | 2008-02-05 |
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