JP2015149473A - パターン形成方法 - Google Patents
パターン形成方法 Download PDFInfo
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- JP2015149473A JP2015149473A JP2014259507A JP2014259507A JP2015149473A JP 2015149473 A JP2015149473 A JP 2015149473A JP 2014259507 A JP2014259507 A JP 2014259507A JP 2014259507 A JP2014259507 A JP 2014259507A JP 2015149473 A JP2015149473 A JP 2015149473A
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- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000000463 material Substances 0.000 claims abstract description 138
- 238000009826 distribution Methods 0.000 claims abstract description 10
- 125000006850 spacer group Chemical group 0.000 claims description 45
- 239000004065 semiconductor Substances 0.000 claims description 39
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 37
- 229910052799 carbon Inorganic materials 0.000 claims description 37
- 239000000758 substrate Substances 0.000 claims description 24
- 229920002120 photoresistant polymer Polymers 0.000 claims description 21
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000002243 precursor Substances 0.000 claims description 18
- 229910052710 silicon Inorganic materials 0.000 claims description 18
- 239000010703 silicon Substances 0.000 claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 239000012777 electrically insulating material Substances 0.000 claims description 10
- 238000005530 etching Methods 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 7
- 239000002019 doping agent Substances 0.000 claims description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 239000004793 Polystyrene Substances 0.000 claims description 5
- 238000007385 chemical modification Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 5
- -1 poly (dimethylsiloxane) Polymers 0.000 claims description 5
- 230000001788 irregular Effects 0.000 claims description 4
- 125000005375 organosiloxane group Chemical group 0.000 claims description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000000206 photolithography Methods 0.000 claims description 3
- 238000000059 patterning Methods 0.000 claims 2
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 description 36
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 14
- 230000008569 process Effects 0.000 description 12
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 230000008021 deposition Effects 0.000 description 6
- 230000000873 masking effect Effects 0.000 description 6
- 235000012431 wafers Nutrition 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 5
- 238000005481 NMR spectroscopy Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 238000000386 microscopy Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000000231 atomic layer deposition Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000000445 field-emission scanning electron microscopy Methods 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 238000004128 high performance liquid chromatography Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 229910052741 iridium Inorganic materials 0.000 description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 2
- 238000004811 liquid chromatography Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 239000013557 residual solvent Substances 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229920005573 silicon-containing polymer Polymers 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- 125000003396 thiol group Chemical group [H]S* 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- AQBRSLDIKKMTOC-UHFFFAOYSA-N [Li][Si](C)(C)C.O[SiH3] Chemical compound [Li][Si](C)(C)C.O[SiH3] AQBRSLDIKKMTOC-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000006117 anti-reflective coating Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- YGHUUVGIRWMJGE-UHFFFAOYSA-N chlorodimethylsilane Chemical compound C[SiH](C)Cl YGHUUVGIRWMJGE-UHFFFAOYSA-N 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- HTDJPCNNEPUOOQ-UHFFFAOYSA-N hexamethylcyclotrisiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O1 HTDJPCNNEPUOOQ-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229940030980 inova Drugs 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- KBJKWYZQIJZAOZ-UHFFFAOYSA-N lithium;oxidosilane Chemical compound [Li+].[SiH3][O-] KBJKWYZQIJZAOZ-UHFFFAOYSA-N 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011175 product filtration Methods 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- CZDYPVPMEAXLPK-UHFFFAOYSA-N tetramethylsilane Chemical compound C[Si](C)(C)C CZDYPVPMEAXLPK-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
- H01L21/0274—Photolithographic processes
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0337—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3081—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their composition, e.g. multilayer masks, materials
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3083—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/3086—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3083—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/3088—Process specially adapted to improve the resolution of the mask
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
-
- 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
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
- H01L21/76816—Aspects relating to the layout of the pattern or to the size of vias or trenches
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Drying Of Semiconductors (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Physical Vapour Deposition (AREA)
- Chemical Vapour Deposition (AREA)
- Semiconductor Memories (AREA)
- Non-Volatile Memory (AREA)
Abstract
Description
Claims (35)
- パターンを形成する方法であって、
材料上に第一のマスクを形成することであって、前記第一のマスクは、その中に伸長し、第一のパターンを画定する複数のフィーチャを有し、前記第一のパターンは、前記複数のフィーチャの分布にわたる第一レベルの均一性を有する、ことと、
前記複数のフィーチャを狭めて、前記第一のマスクから第二のマスクを生成するために、前記複数のフィーチャ内に前記第一のマスクにわたってブラシ層を形成することであって、前記第二のマスクは、前記第一レベルの均一性よりも大きい、前記狭められた複数のフィーチャにわたる第二レベルの均一性を有する、ことと、
前記材料へ前記第二のマスクからパターンを転写することと、
を含む、
ことを特徴とする方法。 - 前記第一のマスクは、周期表の16群由来の一つ以上の元素を含む表面を含み、前記ブラシ層は、当該複数の元素による前記表面に対する複数のポリマー有機シロキサンの一つ以上の共有結合によって形成される、
ことを特徴とする請求項1に記載の方法。 - 前記マスクは酸素含有表面を含み、前記ブラシ層は、前記酸素含有表面を有する、ポリスチレン、ポリ(ジメチルシロキサン)およびポリ(メチルメタクリレート)のうちの一つ以上を含む前駆体の反応を通して形成される、
ことを特徴とする請求項1に記載の方法。 - 前記材料は炭素で構成され、
前記第一のマスクは酸素含有表面を含み、
前記ブラシ層は、前記酸素含有表面を有するポリ(ジメチルシロキサン)を含む前駆体の反応を通して形成される、
ことを特徴とする請求項1に記載の方法。 - 前記ポリ(ジメチルシロキサン)は、約5,000原子質量単位から約110,000原子質量単位の範囲内の分子量のポリマーで構成される、
ことを特徴とする請求項4に記載の方法。 - 前記第一のマスクの前記複数のフィーチャは、二つ以上の異なる形状で分布され、前記ブラシ層は、当該複数の形状間の相違を軽減する、
ことを特徴とする請求項1に記載の方法。 - 前記第一のマスクの前記複数のフィーチャは、不規則な周辺表面を有し、前記ブラシ層は、前記周辺表面にわたる不規則性を低減する、
ことを特徴とする請求項1に記載の方法。 - 前記転写することは、前記材料のエッチングを含む、
ことを特徴とする請求項1に記載の方法。 - 前記転写することは、前記材料へのドーパントの注入を含む、
ことを特徴とする請求項1に記載の方法。 - 前記第二のマスクの前記狭められた複数のフィーチャは、実質的に円形の周辺部を有する複数の開口である、
ことを特徴とする請求項1に記載の方法。 - 前記転写する前に、前記ブラシ層を化学的に改変することをさらに含む、
ことを特徴とする請求項1に記載の方法。 - 前記化学的改変は、前記ブラシ層の酸素への暴露を含む、
ことを特徴とする請求項11に記載の方法。 - 前記化学的改変は、前記ブラシ層のO2プラズマへの暴露を含む、
ことを特徴とする請求項11に記載の方法。 - パターンを形成する方法であって、
半導体基板上に積層を形成することであって、前記積層は、電気的に絶縁性の材料上に炭素を含む、ことと、
前記炭素上に第一のマスクを形成することであって、前記第一のマスクは、第一のパターンを画定する、その中に伸長する複数の開口を有し、前記第一のパターンは、前記複数の開口の分布にわたって第一レベルの均一性を有する、ことと、
前記複数の開口を狭め、前記第一のマスクから第二のマスクを生成するために、前記複数の開口内、かつ前記第一のマスクにわたってブラシ層を形成することであって、前記ブラシ層は、前記炭素に対して、前記第一のマスクの材料に沿って選択的に形成され、前記第二のマスクは、前記第一レベルの均一性よりも大きい、前記狭められた複数の開口にわたる第二レベルの均一性を有する、ことと、
前記炭素および前記電気的に絶縁性の材料を通して、前記第二のマスクからパターンを転写することと、
を含む、
ことを特徴とする方法。 - 前記第一のマスクの前記複数の開口は、二つ以上の異なる形状間で分布され、前記ブラシ層は、当該複数の形状間の相違を軽減する、
ことを特徴とする請求項14に記載の方法。 - 前記第一のマスクの前記複数の開口は、不規則な周辺表面を有し、前記ブラシ層は、前記複数の周辺表面にわたる不規則性を低減する、
ことを特徴とする請求項14に記載の方法。 - 前記第一のマスクは、無機酸化物を含む、
ことを特徴とする請求項14に記載の方法。 - 前記第一のマスクは、二酸化シリコンを含む、
ことを特徴とする請求項14に記載の方法。 - 前記第一のマスクは、シリコン酸窒化物を含む、
ことを特徴とする請求項14に記載の方法。 - 前記第一のマスクは、酸素含有フィルムでコンフォーマルに被覆されたフォトレジストを含む、
ことを特徴とする請求項14に記載の方法。 - 前記第一のマスクは、二酸化シリコンもしくはシリコン酸窒化物でコンフォーマルに被覆されたフォトレジストを含む、
ことを特徴とする請求項14に記載の方法。 - 前記電気的に絶縁性の材料は、二酸化シリコンを含む、
ことを特徴とする請求項14に記載の方法。 - 前記第一のマスクを前記形成することは、
前記フォトレジスト内に複数の開口の第一の配置を形成するために、フォトレジストをフォトリソグラフィーでパターン化することと、
複数の開口の第二の配置を形成するために、前記第一の配置の前記複数の開口を拡大することと、
ブラシ層前駆体と反応する反応性表面を有するスペーサ材料と前記第二の配置の複数の開口を整列させることであって、前記整列された複数の開口は、前記第一のマスクの複数の開口の前記第一のパターンである、ことと、
を含む、
ことを特徴とする請求項14に記載の方法。 - 前記反応性表面は酸素を含む、
ことを特徴とする請求項23に記載の方法。 - 前記反応性表面は、前記スペーサ材料の表面のプラズマ酸化によって形成される、
ことを特徴とする請求項23に記載の方法。 - 前記炭素上のシリコン酸窒化物を含み、前記第一のマスクを前記形成することは、
前記フォトレジスト内の複数の開口の第一の配置を形成するために、前記フォトレジストをフォトリソグラフィーでパターン化することと、
複数の開口の第二の配置を形成するために、前記第一の配置の前記複数の開口を拡大することと、
複数の開口の前記第一のパターンを形成するために、スペーサ材料と前記第二の配置の複数の開口を整列させることと、
前記シリコン酸窒化物を通して前記第一のパターンを転写することであって、それによって、そこを通って伸長する複数の開口の前記第一のパターンを有する前記シリコン酸窒化物を含むように、前記第一のマスクを形成する、ことと、
を含む、
ことを特徴とする請求項14に記載の方法。 - 導電性材料で前記複数の開口を充填することをさらに含む、
ことを特徴とする請求項14に記載の方法。 - 前記半導体基板へと前記複数の開口を伸長することをさらに含む、
ことを特徴とする請求項14に記載の方法。 - 前記複数の開口を通って、前記半導体基板へとドーパントを注入することをさらに含む、
ことを特徴とする請求項14に記載の方法。 - パターンを形成する方法であって、
そこを通って伸長する複数の間隔をあけられた開口を有するパターン化されたフォトレジストを形成することと、
前記複数の開口を拡大することと、
拡大された複数の開口内にスペーサ材料を堆積し、その後、前記スペーサ材料を異方性エッチングして前記フォトレジストを除去することであって、前記異方性エッチングは、前記スペーサ材料から複数のスペーサを形成し、当該複数のスペーサは、複数の環状リングであって、二つの形状の開口を有し、そこを通って伸長するパターンを有する第一のマスクである、ことと、
前記二つの形状間の相違を軽減して前記第一のマスクから第二のマスクを形成するために、前記スペーサ材料に沿って、前記複数の開口内にブラシ層を形成することと、
前記第二のマスクから、前記第二のマスク下の第二の材料へとパターンを転写することと、
を含む、
ことを特徴とする方法。 - 炭素含有材料は、前記フォトレジストと前記第二の材料間にあり、前記炭素含有材料は、前記ブラシ層が形成されると、前記複数の開口の底部に露出され、前記ブラシ層は、前記炭素含有材料と比較して、前記スペーサ材料上に選択的にあるように形成され、前記パターンは前記炭素含有材料を通って、前記第二の材料へと転写される、
ことを特徴とする請求項30に記載の方法。 - 前記スペーサ材料は、二酸化シリコンもしくはシリコン酸窒化物を含む、
ことを特徴とする請求項31に記載の方法。 - 前記ブラシ層は、ポリマー有機シロキサンを含む前駆体から形成される、
ことを特徴とする請求項32に記載の方法。 - 前記ブラシ層は、ポリ(ジメチルシロキサン)を含む前駆体から形成される、
ことを特徴とする請求項32に記載の方法。 - 前記第二の材料は、半導体ベース上の電気的に絶縁性の材料形式であって、前記パターンは、前記第二の材料を通って前記半導体ベースへと転写される、
ことを特徴とする請求項30に記載の方法。
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