JP6591311B2 - 半導体装置およびその製造方法 - Google Patents
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- 230000015654 memory Effects 0.000 claims description 169
- 238000002955 isolation Methods 0.000 claims description 60
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 229910052710 silicon Inorganic materials 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- 239000012535 impurity Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
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- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
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- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
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- 239000010937 tungsten Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 229910052731 fluorine Inorganic materials 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
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- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PCLURTMBFDTLSK-UHFFFAOYSA-N nickel platinum Chemical compound [Ni].[Pt] PCLURTMBFDTLSK-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
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- 239000000243 solution Substances 0.000 description 1
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- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66787—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a gate at the side of the channel
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- H01L29/7851—Field effect transistors with field effect produced by an insulated gate having a channel with a horizontal current flow in a vertical sidewall of a semiconductor body, e.g. FinFET, MuGFET with the body tied to the substrate
Description
<半導体装置のデバイス構造>
図1は、本実施の形態における半導体装置の要部平面図である。図1に示すように、メモリセル部Aには、複数のメモリセルが行列状に配置され、メモリセルアレイを構成している。図2は、本実施の形態における半導体装置の要部断面図である。図2には、メモリセル部Aの3つの断面図を示しており、メモリセル部A1は、図1のA1−A1´に沿う断面図、メモリセル部A2は、図1のA2−A2´に沿う断面図、メモリセル部A3は、図1のA3−A3´に沿う断面図である。つまり、メモリセル部A1は、フィンFAの延在方向に沿う断面図であり、メモリセル部A2は、制御ゲート電極CGの延在方向に沿う断面図であり、メモリセル部A3は、メモリゲート電極MGの延在方向に沿う断面図である。
図3〜図17は、本実施の形態の半導体装置の形成工程中の要部断面図または平面図である。
BL ビット線
CG 制御ゲート電極
CNT コンタクトホール
CT 制御トランジスタ
EX1、EX2、EX3 n-型半導体領域
FA フィン
FAa 主面
FAs 側面
GIm、GIt ゲート絶縁膜
IF1、IF2、IF3 絶縁膜
IL1、IL2 層間絶縁膜
MC メモリセル
MD ドレイン領域
ME1、ME2 金属膜
MG メモリゲート電極
MS ソース領域
MT メモリトランジスタ
MW 金属配線
PG プラグ電極
PR1、PR2 レジスト膜
PW1 p型ウエル
SC シリサイド層
SL ソース線
SP スペーサ
STM 素子分離膜
STMa、STMc、STMm 主面
SW サイドウォールスペーサ
1 半導体基板
1a 主面(上面)
2、3、6、7、9、10、11、13 絶縁膜
4 マスク膜
5 ハードマスク膜
6a 主面
8、14 導体膜
Claims (7)
- 第1主面を有する半導体基板と、
前記第1主面上に形成された素子分離膜と、
前記半導体基板の一部であって、前記素子分離膜から突出し、平面視にて第1方向に延在する凸部と、
第1絶縁膜を介して、前記凸部の表面に沿って前記第1方向と直交する第2方向に延在し、かつ、前記素子分離膜の第1部分の第2主面と重なる制御ゲート電極と、
第2絶縁膜を介して、前記凸部の表面に沿って前記第2方向に延在し、かつ、前記素子分離膜の第2部分の第3主面と重なるメモリゲート電極と、
を有する半導体装置であって、
前記第1部分で、前記制御ゲート電極は、前記第2主面と接触しており、
前記第2部分で、前記第2絶縁膜は、前記凸部から連続的に延在し、前記第3主面と前記メモリゲート電極との間に介在し、
前記第1主面を基準として、前記第3主面は、前記第2主面よりも低い、半導体装置。 - 請求項1に記載の半導体装置において、
前記第2絶縁膜は、窒化シリコン膜であり、
前記第2絶縁膜の膜厚は、前記第1絶縁膜の膜厚よりも厚い、半導体装置。 - 請求項1に記載の半導体装置において、
前記第1主面上において、前記第2部分の前記素子分離膜の膜厚は、前記第1部分の前記素子分離膜の膜厚よりも薄い、半導体装置。 - 第1主面を有する半導体基板と、
前記第1主面上に形成された素子分離膜と、
前記半導体基板の一部であって、前記素子分離膜から突出し、平面視にて第1方向に延在する凸部と、
第1絶縁膜を介して、前記凸部の表面に沿って前記第1方向と直交する第2方向に延在し、かつ、前記素子分離膜の第1部分の第2主面と重なる制御ゲート電極と、
第2絶縁膜を介して、前記凸部の表面に沿って前記第2方向に延在し、かつ、前記素子分離膜の第2部分の第3主面と重なるメモリゲート電極と、
を有する半導体装置であって、
前記第3主面から前記メモリゲート電極が重なる前記凸部の先端までの高さは、前記第2主面から前記制御ゲート電極が重なる前記凸部の先端までの高さよりも高い、半導体装置。 - 請求項4に記載の半導体装置において、
前記第1部分で、前記制御ゲート電極は、前記第2主面と接触しており、
前記第2部分で、前記第2絶縁膜は、前記凸部から連続的に延在し、前記第3主面と前記メモリゲート電極との間に介在している、半導体装置。 - 請求項5に記載の半導体装置において、
前記第2絶縁膜は、窒化シリコン膜であり、
前記第2絶縁膜の膜厚は、前記第1絶縁膜の膜厚よりも厚い、半導体装置。 - 請求項4に記載の半導体装置において、
前記第1主面上において、前記第2部分の前記素子分離膜の膜厚は、前記第1部分の前記素子分離膜の膜厚よりも薄い、半導体装置。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016032688A JP6591311B2 (ja) | 2016-02-24 | 2016-02-24 | 半導体装置およびその製造方法 |
US15/378,352 US9741869B1 (en) | 2016-02-24 | 2016-12-14 | Semiconductor device and method for manufacturing same |
TW105141783A TW201740542A (zh) | 2016-02-24 | 2016-12-16 | 半導體裝置及其製造方法 |
CN201710040163.6A CN107123652B (zh) | 2016-02-24 | 2017-01-20 | 半导体装置以及用于制造半导体装置的方法 |
US15/648,431 US9899540B2 (en) | 2016-02-24 | 2017-07-12 | Semiconductor device and method for manufacturing same |
US15/867,681 US10038102B2 (en) | 2016-02-24 | 2018-01-10 | Semiconductor device and method for manufacturing same |
Applications Claiming Priority (1)
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JP6629142B2 (ja) | 2016-06-03 | 2020-01-15 | ルネサスエレクトロニクス株式会社 | 半導体装置およびその製造方法 |
JP6783710B2 (ja) * | 2017-06-22 | 2020-11-11 | ルネサスエレクトロニクス株式会社 | 半導体装置および半導体装置の製造方法 |
US10276581B1 (en) * | 2017-10-31 | 2019-04-30 | Taiwan Semiconductor Manufacturing Co., Ltd. | Integrated circuit chip and manufacturing method thereof |
CN109979943B (zh) * | 2017-12-28 | 2022-06-21 | 联华电子股份有限公司 | 半导体元件及其制造方法 |
US20200135898A1 (en) * | 2018-10-30 | 2020-04-30 | International Business Machines Corporation | Hard mask replenishment for etching processes |
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TW201740542A (zh) | 2017-11-16 |
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JP2017152505A (ja) | 2017-08-31 |
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US10038102B2 (en) | 2018-07-31 |
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