JP5091452B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP5091452B2 JP5091452B2 JP2006275371A JP2006275371A JP5091452B2 JP 5091452 B2 JP5091452 B2 JP 5091452B2 JP 2006275371 A JP2006275371 A JP 2006275371A JP 2006275371 A JP2006275371 A JP 2006275371A JP 5091452 B2 JP5091452 B2 JP 5091452B2
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- 239000004065 semiconductor Substances 0.000 title claims description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 29
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 41
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 41
- 238000002955 isolation Methods 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 33
- 239000000758 substrate Substances 0.000 claims description 33
- 239000007795 chemical reaction product Substances 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 45
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 28
- 230000008569 process Effects 0.000 description 17
- 229910052581 Si3N4 Inorganic materials 0.000 description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 16
- 229910052710 silicon Inorganic materials 0.000 description 16
- 239000010703 silicon Substances 0.000 description 16
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 16
- 238000001020 plasma etching Methods 0.000 description 9
- 101100535994 Caenorhabditis elegans tars-1 gene Proteins 0.000 description 6
- 229910021417 amorphous silicon Inorganic materials 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229920001709 polysilazane Polymers 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910021332 silicide Inorganic materials 0.000 description 5
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 241000293849 Cordylanthus Species 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- MFHHXXRRFHXQJZ-UHFFFAOYSA-N NONON Chemical compound NONON MFHHXXRRFHXQJZ-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/76224—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66825—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a floating gate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/788—Field effect transistors with field effect produced by an insulated gate with floating gate
- H01L29/7881—Programmable transistors with only two possible levels of programmation
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/30—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the memory core region
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/30—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the memory core region
- H10B41/35—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the memory core region with a cell select transistor, e.g. NAND
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B69/00—Erasable-and-programmable ROM [EPROM] devices not provided for in groups H10B41/00 - H10B63/00, e.g. ultraviolet erasable-and-programmable ROM [UVEPROM] devices
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Element Separation (AREA)
- Semiconductor Memories (AREA)
- Non-Volatile Memory (AREA)
Description
しかし、特許文献1の方法では反応生成物の除去が十分ではなかった。
NAND型のフラッシュメモリ装置1のメモリセル領域Mに構成されるメモリセルアレイArは、2個の選択ゲートトランジスタTrs1およびTrs2と、当該選択ゲートトランジスタTrs1およびTrs2間に対して直列接続された複数個(例えば8個:2のn乗個(nは正数))のメモリセルトランジスタTrmとからなるNANDセルユニットSUが行列状に形成されることにより構成されている。NANDセルユニットSU内において、複数個のメモリセルトランジスタTrmは隣接するもの同士でソース/ドレイン領域を共用して形成されている。
素子分離絶縁膜11は、シリコン基板2の上部に埋込まれると共に、その上面が当該シリコン基板2の上面やゲート絶縁膜3の上面より上方に突出し且つ多結晶シリコン層4の上面より下方に位置するように構成されている。また、素子分離絶縁膜11の側壁面は多結晶シリコン層4およびゲート絶縁膜3の側面と面一になるよう形成されている。この素子分離絶縁膜11は、素子分離溝10の内壁面に沿って形成されたシリコン酸化膜11aと、素子分離溝10内のシリコン酸化膜11aの内側に形成されたポリシラザン膜11bと、シリコン酸化膜11aの素子分離溝10の内側で且つポリシラザン膜11b上に形成されたシリコン酸化膜11cとを備えて構成されている。
本発明は、上記実施例にのみ限定されるものではなく、次のように変形または拡張できる。
NAND型のフラッシュメモリ装置1に適用したが、その他の記憶素子を備えたフラッシュメモリ装置(例えばNOR型のフラッシュメモリ装置)に適用できるのはいうまでもなく、フラッシュメモリ装置に限らず、2層またはそれ以上の積層ゲート電極構造を備えた半導体装置にも適用可能である。
ゲート絶縁膜3をシリコン酸化膜で形成したが、その他の材料の絶縁膜で形成しても良い。
(1)に示す工程では、希釈率を100:1としたが、それ以上の希釈率(例えば200:1)のHF溶液を適用しても良い。この場合、1.5[nm]以下のエッチング量となる条件を適用すると良い。
Claims (4)
- 半導体基板上にゲート絶縁膜を形成する工程と、
前記ゲート絶縁膜上にゲート電極層を形成する工程と、
前記ゲート電極層、ゲート絶縁膜、半導体基板に溝を形成する工程と、
前記溝内を希釈したフッ酸によって処理する工程と、
前記溝内をフッ酸蒸気によって処理する工程と、
前記溝内に素子分離絶縁膜を形成する工程とを備えたことを特徴とする半導体装置の製造方法。 - 前記溝を形成した後前記溝内を希釈したフッ酸によって処理する前、又は、
前記溝内を希釈したフッ酸によって処理した後前記溝内をフッ酸蒸気によって処理する前、
の何れかのタイミングに、前記溝内をアッシャー処理する工程を備えた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。 - RIE法により、半導体基板に溝を形成する工程と、
前記溝内を希釈したフッ酸によって処理する工程と、
前記溝内をフッ酸蒸気によって処理する工程と、
前記溝の表面にHTO膜を形成する工程と、
前記HTO膜上に素子分離絶縁膜を形成し、前記溝を埋め込む工程とを備えたことを特徴とする半導体装置の製造方法。 - RIE法により、半導体基板に溝を形成する工程と、
前記溝内に形成された炭素/シリコン酸化/炭素含有シリコン酸化の積層膜である反応生成物を除去する工程であって、前記溝内を希釈したフッ酸によって処理することで炭素およびシリコン酸化膜を除去した後に、前記溝内をフッ酸蒸気によって処理することで炭素含有シリコン酸化膜を除去する工程とを備えたことを特徴とする半導体装置の製造方法。
Priority Applications (2)
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JP2006275371A JP5091452B2 (ja) | 2006-10-06 | 2006-10-06 | 半導体装置の製造方法 |
US11/868,164 US7786013B2 (en) | 2006-10-06 | 2007-10-05 | Method of fabricating semiconductor device |
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JP2006275371A JP5091452B2 (ja) | 2006-10-06 | 2006-10-06 | 半導体装置の製造方法 |
Publications (2)
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JP2008098239A JP2008098239A (ja) | 2008-04-24 |
JP5091452B2 true JP5091452B2 (ja) | 2012-12-05 |
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JP2006275371A Expired - Fee Related JP5091452B2 (ja) | 2006-10-06 | 2006-10-06 | 半導体装置の製造方法 |
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US (1) | US7786013B2 (ja) |
JP (1) | JP5091452B2 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI441239B (zh) * | 2006-12-12 | 2014-06-11 | Asml Netherlands Bv | 製造微影元件的方法、微影單元及電腦程式產品 |
JP2008166529A (ja) * | 2006-12-28 | 2008-07-17 | Spansion Llc | 半導体装置の製造方法 |
KR100955935B1 (ko) * | 2007-12-21 | 2010-05-03 | 주식회사 하이닉스반도체 | 반도체 소자의 소자분리막 형성방법 |
JP2010027690A (ja) | 2008-07-15 | 2010-02-04 | Toshiba Corp | 半導体装置の製造方法 |
JP4956500B2 (ja) * | 2008-07-22 | 2012-06-20 | 株式会社東芝 | 半導体記憶装置及びその製造方法 |
JP2010027904A (ja) * | 2008-07-22 | 2010-02-04 | Elpida Memory Inc | 半導体装置の製造方法 |
JP5667961B2 (ja) * | 2011-11-04 | 2015-02-12 | 株式会社東芝 | 半導体装置の製造方法 |
CN102412141A (zh) * | 2011-11-14 | 2012-04-11 | 上海华虹Nec电子有限公司 | 一种去除深沟槽内氧化膜残留的方法 |
CN105789133B (zh) * | 2014-12-24 | 2019-09-20 | 上海格易电子有限公司 | 一种闪存存储单元及制作方法 |
CN108470710B (zh) | 2017-02-23 | 2019-09-17 | 联华电子股份有限公司 | 一种形成半导体存储装置的方法 |
US10468409B2 (en) * | 2018-03-14 | 2019-11-05 | Taiwan Semiconductor Manufacturing Co., Ltd. | FinFET device with oxidation-resist STI liner structure |
Family Cites Families (12)
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US6124206A (en) * | 1997-12-29 | 2000-09-26 | Siemens Aktiengesellschaft | Reduced pad erosion |
US6475927B1 (en) * | 1998-02-02 | 2002-11-05 | Micron Technology, Inc. | Method of forming a semiconductor device |
US6284666B1 (en) * | 2000-05-31 | 2001-09-04 | International Business Machines Corporation | Method of reducing RIE lag for deep trench silicon etching |
US6620681B1 (en) * | 2000-09-08 | 2003-09-16 | Samsung Electronics Co., Ltd. | Semiconductor device having desired gate profile and method of making the same |
JP3773785B2 (ja) * | 2000-11-24 | 2006-05-10 | 株式会社東芝 | 半導体装置の製造方法 |
JP2002217176A (ja) * | 2001-01-22 | 2002-08-02 | Denso Corp | 半導体装置の製造方法 |
US7125783B2 (en) * | 2001-04-18 | 2006-10-24 | Integrated Device Technology, Inc. | Dielectric anti-reflective coating surface treatment to prevent defect generation in associated wet clean |
KR100426483B1 (ko) * | 2001-12-22 | 2004-04-14 | 주식회사 하이닉스반도체 | 플래쉬 메모리 셀의 제조 방법 |
US20030181048A1 (en) * | 2002-03-25 | 2003-09-25 | Weng-Hsing Huang | STI method for semiconductor processes |
JP2004111547A (ja) * | 2002-09-17 | 2004-04-08 | Toshiba Corp | 半導体装置、半導体装置の製造方法 |
JP2006156471A (ja) * | 2004-11-25 | 2006-06-15 | Toshiba Corp | 半導体装置および半導体装置の製造方法 |
KR100801308B1 (ko) * | 2005-11-12 | 2008-02-11 | 주식회사 하이닉스반도체 | 고선택비 하드마스크를 이용한 트렌치 형성 방법 및 그를이용한 반도체소자의 소자분리 방법 |
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2006
- 2006-10-06 JP JP2006275371A patent/JP5091452B2/ja not_active Expired - Fee Related
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Publication number | Publication date |
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US7786013B2 (en) | 2010-08-31 |
US20080090378A1 (en) | 2008-04-17 |
JP2008098239A (ja) | 2008-04-24 |
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