JP7277225B2 - エッチング方法、及び、プラズマ処理装置 - Google Patents
エッチング方法、及び、プラズマ処理装置 Download PDFInfo
- Publication number
- JP7277225B2 JP7277225B2 JP2019073395A JP2019073395A JP7277225B2 JP 7277225 B2 JP7277225 B2 JP 7277225B2 JP 2019073395 A JP2019073395 A JP 2019073395A JP 2019073395 A JP2019073395 A JP 2019073395A JP 7277225 B2 JP7277225 B2 JP 7277225B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- region
- etching
- workpiece
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012545 processing Methods 0.000 title claims description 134
- 238000000034 method Methods 0.000 title claims description 122
- 238000005530 etching Methods 0.000 title claims description 101
- 239000007789 gas Substances 0.000 claims description 325
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 40
- 239000001257 hydrogen Substances 0.000 claims description 38
- 229910052739 hydrogen Inorganic materials 0.000 claims description 38
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 37
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 16
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 13
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 13
- 125000001153 fluoro group Chemical group F* 0.000 claims description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 21
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 16
- 239000000463 material Substances 0.000 description 12
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000004020 conductor Substances 0.000 description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000015654 memory Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QKCGXXHCELUCKW-UHFFFAOYSA-N n-[4-[4-(dinaphthalen-2-ylamino)phenyl]phenyl]-n-naphthalen-2-ylnaphthalen-2-amine Chemical compound C1=CC=CC2=CC(N(C=3C=CC(=CC=3)C=3C=CC(=CC=3)N(C=3C=C4C=CC=CC4=CC=3)C=3C=C4C=CC=CC4=CC=3)C3=CC4=CC=CC=C4C=C3)=CC=C21 QKCGXXHCELUCKW-UHFFFAOYSA-N 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
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- H01L21/04—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
- H01L21/3065—Plasma etching; Reactive-ion etching
-
- 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
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
- H01L21/31116—Etching inorganic layers by chemical means by dry-etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32715—Workpiece holder
- H01J37/32724—Temperature
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02164—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon oxide, e.g. SiO2
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/0217—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67069—Apparatus for fluid treatment for etching for drying etching
-
- 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
- H10B41/20—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/20—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/245—Detection characterised by the variable being measured
- H01J2237/24571—Measurements of non-electric or non-magnetic variables
- H01J2237/24585—Other variables, e.g. energy, mass, velocity, time, temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/334—Etching
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67103—Apparatus for thermal treatment mainly by conduction
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67109—Apparatus for thermal treatment mainly by convection
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67248—Temperature monitoring
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6831—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using electrostatic chucks
-
- 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
- H10B41/20—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels
- H10B41/23—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels
- H10B41/27—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/20—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels
- H10B43/23—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels
- H10B43/27—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/50—EEPROM devices comprising charge-trapping gate insulators characterised by the boundary region between the core and peripheral circuit regions
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Plasma & Fusion (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Drying Of Semiconductors (AREA)
- Semiconductor Memories (AREA)
- Non-Volatile Memory (AREA)
- Plasma Technology (AREA)
Description
このようなエッチングは、被加工物の温度を-30℃以上30℃以下とし、フルオロカーボンガス及び水素含有ガスを含む処理ガスの流量及び元素組成を0.04<Ua/Ub<0.22を満たすようにすることによって実現され得る。
(条件Pa)
・処理容器12内の圧力:15~30[mTorr]。
・第1の高周波電源62の周波数、電力:40[MHz]、2~5[kW]。
・第2の高周波電源64の周波数、電力:3[MHz]、7~9[kW]。
・直流電源部70の直流電圧:0[V]。
・処理ガスGの流量:(C4F8ガス)50[sccm]、(H2ガス)160[sccm]、(HBrガス)20[sccm]。
処理ガスGには、更にO2ガスが含まれ得る。O2ガスの流量は、工程ST3のエッチング処理に用いるマスクMSKの所望の形状に応じて決定され得る。
処理ガスGの第1ガスの第1フルオロカーボンガス~第pフルオロカーボンガスに含まれる第iフルオロカーボンガス(iは1以上p以下の整数)のエッチング処理の実行中における流量をJ(i)とする。第iフルオロカーボンガスの元素組成に含まれるフッ素原子の個数をM(i)、第iフルオロカーボンガスの元素組成に含まれる炭素原子の個数をN(i)とする。Uaは、iが取り得る全ての値についてJ(i)×N(i)/M(i)を加え合わせて得られる値である。
処理ガスGの第2ガスの第1水素含有ガス~第q水素含有ガスに含まれる第k水素含有ガスのエッチング処理の実行中における流量をJ(k)(kは1以上q以下の整数)とする。第k水素含有ガスの元素組成に含まれる水素原子の個数をH(k)とする。Ubは、kが取り得る全ての値についてJ(k)×H(k)を加え合わせて得られる値である。
・処理ガスGの流量:(第1ガス)30~80[sccm]、(H2ガス)50~240[sccm]、(HBrガス)20[sccm]。
処理ガスGには、更にO2ガスが含まれ得る。O2ガスの流量は、エッチング処理に用いるマスクMSKの所望の形状に応じて、決定され得る。
(第2ガスにH2ガスを用いた場合)
・処理ガスGの流量:(第1ガス)30~80[sccm]、(H2ガス)50~240[sccm]、(HBrガス)20[sccm]。
(第2ガスにH2ガス及びCH4ガスの混合ガスを用いた場合)
・処理ガスGの流量:(第1ガス)30~80[sccm]、(H2ガス)10~30[sccm]、(CH4ガス)50~70[sccm]、(HBrガス)10~30[sccm]。
処理ガスGには、更にO2ガスが含まれ得る。O2ガスの流量は、エッチング処理に用いるマスクMSKの所望の形状に応じて、決定され得る。
・処理ガスGの流量:(C4F8ガス)70[sccm]、(H2ガス)140[sccm]、(HBrガス)20[sccm]。処理ガスGには、更にO2ガスが含まれ得る。
Claims (5)
- 被加工物をエッチングするエッチング方法であって、該エッチング方法は、
プラズマ処理装置の処理容器内に設けられた載置台に被加工物を載置し、
前記被加工物の温度を予め設定された温度範囲に維持する設定を行い、
前記被加工物の温度を前記温度範囲に維持しつつ、前記処理容器内に処理ガスのプラズマを生成し、該プラズマを用いて前記被加工物に対するエッチング処理を行い、
前記被加工物は、シリコン酸化膜及びシリコン窒化膜を含み、
前記処理ガスは、第1ガス及び第2ガスを含み、
前記第1ガスは、フルオロカーボンガスであり、
前記第2ガスは、水素含有ガスであり、
前記温度範囲は、-30℃以上30℃以下であり、
前記第1ガスは、第1フルオロカーボンガスとしてC4F8ガス、第2フルオロカーボンガスとしてC3F8、及び第3フルオロカーボンガスとしてC4F6ガスを含み、
前記第2ガスは、第1水素含有ガスとしてH2ガス及び第2水素含有ガスとしてCH4ガスを含み、
前記第1フルオロカーボンガス~第3フルオロカーボンガスに含まれる第iフルオロカーボンガスの前記エッチング処理の実行中における流量をJ(i)、該第iフルオロカーボンガスの元素組成に含まれるフッ素原子の個数をM(i)、該第iフルオロカーボンガスの元素組成に含まれる炭素原子の個数をN(i)としてiが取り得る全ての値(iは1以上3以下の整数)についてJ(i)×N(i)/M(i)を加え合わせた値をUaとし、前記第1水素含有ガス~第2水素含有ガスに含まれる第k水素含有ガスの該エッチング処理の実行中における流量をJ(k)、該第k水素含有ガスの元素組成に含まれる水素原子の個数をH(k)としてkが取り得る全ての値(kは1又は2の整数)についてJ(k)×H(k)を加え合わせた値をUbとした場合に、Ua/Ubは、0.04<Ua/Ub<0.22を満たす、
エッチング方法。 - 前記処理ガスは、更に、第3ガスを含み、
前記第3ガスは、フッ素ではないハロゲン元素を含む、
請求項1に記載のエッチング方法。 - 前記第3ガスは、HBrガスである、
請求項2に記載のエッチング方法。 - 前記被加工物は、第1領域、第2領域、及びマスクを備え、
前記第1領域及び前記第2領域は、前記被加工物の主面に沿って並んでおり、
前記第1領域及び前記第2領域の各々は、前記主面の下に延びており、
前記マスクは、前記第1領域及び前記第2領域の上において前記主面に設けられ、該第1領域及び該第2領域の各々に開口を提供し、
前記第1領域は、第1膜によって構成され、
前記第2領域は、第2膜によって構成され、
前記第1膜は、シリコン酸化膜であり、
前記第2膜は、シリコン酸化膜とシリコン窒化膜とが交互に積層された構成を有し、
前記第1領域及び前記第2領域は、前記エッチング処理において同時にエッチングされる、
請求項1~3の何れか一項に記載のエッチング方法。 - 前記被加工物は、第3領域を更に備え、
前記第3領域は、前記主面の下に延びており、前記第1領域及び前記第2領域と共に該主面に沿って並んでおり、
前記マスクは、前記第3領域の上において前記主面に設けられ、該第3領域に開口を提供し、
前記第3領域は、前記第1膜及び前記第2膜によって構成され、
前記エッチング処理において、前記第1領域、前記第2領域、及び前記第3領域は、同時にエッチングされる、
請求項4に記載のエッチング方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019073395A JP7277225B2 (ja) | 2019-04-08 | 2019-04-08 | エッチング方法、及び、プラズマ処理装置 |
CN202010221800.1A CN111799170A (zh) | 2019-04-08 | 2020-03-26 | 蚀刻方法和等离子体处理装置 |
KR1020200041140A KR20200118761A (ko) | 2019-04-08 | 2020-04-03 | 에칭 방법 및 플라즈마 처리 장치 |
US16/840,585 US11251049B2 (en) | 2019-04-08 | 2020-04-06 | Etching method and plasma processing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019073395A JP7277225B2 (ja) | 2019-04-08 | 2019-04-08 | エッチング方法、及び、プラズマ処理装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2020174062A JP2020174062A (ja) | 2020-10-22 |
JP7277225B2 true JP7277225B2 (ja) | 2023-05-18 |
Family
ID=72663205
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2019073395A Active JP7277225B2 (ja) | 2019-04-08 | 2019-04-08 | エッチング方法、及び、プラズマ処理装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US11251049B2 (ja) |
JP (1) | JP7277225B2 (ja) |
KR (1) | KR20200118761A (ja) |
CN (1) | CN111799170A (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016197680A (ja) | 2015-04-06 | 2016-11-24 | 東京エレクトロン株式会社 | エッチング方法 |
JP2016219771A (ja) | 2015-05-14 | 2016-12-22 | 東京エレクトロン株式会社 | エッチング方法 |
JP2017050529A (ja) | 2015-08-12 | 2017-03-09 | セントラル硝子株式会社 | ドライエッチング方法 |
WO2018037799A1 (ja) | 2016-08-25 | 2018-03-01 | 日本ゼオン株式会社 | プラズマエッチング方法 |
WO2018225661A1 (ja) | 2017-06-08 | 2018-12-13 | 昭和電工株式会社 | エッチング方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6339961B2 (ja) | 2015-03-31 | 2018-06-06 | 東京エレクトロン株式会社 | エッチング方法 |
JP6498022B2 (ja) | 2015-04-22 | 2019-04-10 | 東京エレクトロン株式会社 | エッチング処理方法 |
JP6541439B2 (ja) | 2015-05-29 | 2019-07-10 | 東京エレクトロン株式会社 | エッチング方法 |
-
2019
- 2019-04-08 JP JP2019073395A patent/JP7277225B2/ja active Active
-
2020
- 2020-03-26 CN CN202010221800.1A patent/CN111799170A/zh active Pending
- 2020-04-03 KR KR1020200041140A patent/KR20200118761A/ko active Search and Examination
- 2020-04-06 US US16/840,585 patent/US11251049B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016197680A (ja) | 2015-04-06 | 2016-11-24 | 東京エレクトロン株式会社 | エッチング方法 |
JP2016219771A (ja) | 2015-05-14 | 2016-12-22 | 東京エレクトロン株式会社 | エッチング方法 |
JP2017050529A (ja) | 2015-08-12 | 2017-03-09 | セントラル硝子株式会社 | ドライエッチング方法 |
WO2018037799A1 (ja) | 2016-08-25 | 2018-03-01 | 日本ゼオン株式会社 | プラズマエッチング方法 |
WO2018225661A1 (ja) | 2017-06-08 | 2018-12-13 | 昭和電工株式会社 | エッチング方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20200118761A (ko) | 2020-10-16 |
US20200321219A1 (en) | 2020-10-08 |
US11251049B2 (en) | 2022-02-15 |
CN111799170A (zh) | 2020-10-20 |
JP2020174062A (ja) | 2020-10-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6541439B2 (ja) | エッチング方法 | |
TWI743072B (zh) | 蝕刻方法及蝕刻裝置 | |
KR102426264B1 (ko) | 에칭 방법 | |
US9449838B2 (en) | Semiconductor device manufacturing method | |
US20210134604A1 (en) | Etching method | |
JP4701776B2 (ja) | エッチング方法及びエッチング装置 | |
US9337056B2 (en) | Semiconductor device manufacturing method | |
KR102283188B1 (ko) | 플라즈마 처리 장치의 클리닝 방법 | |
JP2016051900A (ja) | 高アスペクト比構造におけるコンタクト洗浄 | |
US20090203218A1 (en) | Plasma etching method and computer-readable storage medium | |
US9390935B2 (en) | Etching method | |
US8268184B2 (en) | Etch process for reducing silicon recess | |
CN110544628A (zh) | 对膜进行蚀刻的方法和等离子体处理装置 | |
US20190019685A1 (en) | Etching method | |
US20090203219A1 (en) | Plasma etching method, plasma etching apparatus and computer-readable storage medium | |
JP6502160B2 (ja) | 被処理体を処理する方法 | |
WO2018212045A1 (ja) | 多孔質膜をエッチングする方法 | |
JP2009135498A (ja) | エッチング処理において限界寸法の均一性を調節するための方法 | |
JP7277225B2 (ja) | エッチング方法、及び、プラズマ処理装置 | |
JP2019117876A (ja) | エッチング方法 | |
JP2024001464A (ja) | エッチング方法及びプラズマ処理装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20211227 |
|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20211227 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20221027 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20221108 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20230105 |
|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20230124 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20230323 |
|
C60 | Trial request (containing other claim documents, opposition documents) |
Free format text: JAPANESE INTERMEDIATE CODE: C60 Effective date: 20230323 |
|
A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20230331 |
|
C21 | Notice of transfer of a case for reconsideration by examiners before appeal proceedings |
Free format text: JAPANESE INTERMEDIATE CODE: C21 Effective date: 20230404 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20230411 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20230508 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 7277225 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |