JP2020096174A - エッチング処理方法及び基板処理装置 - Google Patents
エッチング処理方法及び基板処理装置 Download PDFInfo
- Publication number
- JP2020096174A JP2020096174A JP2019183953A JP2019183953A JP2020096174A JP 2020096174 A JP2020096174 A JP 2020096174A JP 2019183953 A JP2019183953 A JP 2019183953A JP 2019183953 A JP2019183953 A JP 2019183953A JP 2020096174 A JP2020096174 A JP 2020096174A
- Authority
- JP
- Japan
- Prior art keywords
- etching
- film
- opening
- pattern
- etched
- 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.)
- Granted
Links
- 238000005530 etching Methods 0.000 title claims abstract description 278
- 239000000758 substrate Substances 0.000 title claims abstract description 38
- 238000003672 processing method Methods 0.000 title claims abstract description 19
- 238000012545 processing Methods 0.000 title claims description 65
- 238000000151 deposition Methods 0.000 claims abstract description 79
- 230000001681 protective effect Effects 0.000 claims abstract description 75
- 230000008021 deposition Effects 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims description 101
- 230000014509 gene expression Effects 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 67
- 230000008569 process Effects 0.000 description 63
- 238000005137 deposition process Methods 0.000 description 28
- 238000012546 transfer Methods 0.000 description 15
- 230000004048 modification Effects 0.000 description 13
- 238000012986 modification Methods 0.000 description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 11
- 229910052710 silicon Inorganic materials 0.000 description 11
- 239000010703 silicon Substances 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 102100024219 T-cell surface glycoprotein CD1a Human genes 0.000 description 10
- 239000002243 precursor Substances 0.000 description 10
- 229910052814 silicon oxide Inorganic materials 0.000 description 10
- 238000001179 sorption measurement Methods 0.000 description 7
- 229910052581 Si3N4 Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 6
- 229920005591 polysilicon Polymers 0.000 description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 238000004380 ashing Methods 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003860 storage Methods 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
- H01L21/31—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
- 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
-
- 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
-
- 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
- H01L21/302—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
- H01L21/30655—Plasma etching; Reactive-ion etching comprising alternated and repeated etching and passivation steps, e.g. Bosch process
-
- 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
- H01L21/31—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
- H01L21/02—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
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32133—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only
- H01L21/32135—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only
- H01L21/32136—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only using plasmas
-
- 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
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
-
- 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
-
- 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
- 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
- H01L21/76807—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 for dual damascene structures
- H01L21/76813—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 for dual damascene structures involving a partial via etch
-
- 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
-
- 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
- H01J2237/3343—Problems associated with etching
- H01J2237/3346—Selectivity
-
- 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
- H01J37/32137—Radio frequency generated discharge controlling of the discharge by modulation of energy
- H01J37/32155—Frequency modulation
- H01J37/32165—Plural frequencies
-
- 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
- H01L21/02118—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 carbon based polymeric organic or inorganic material, e.g. polyimides, poly cyclobutene or PVC
- H01L21/0212—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 carbon based polymeric organic or inorganic material, e.g. polyimides, poly cyclobutene or PVC the material being fluoro carbon compounds, e.g.(CFx) n, (CHxFy) n or polytetrafluoroethylene
-
- 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
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/02274—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition in the presence of a plasma [PECVD]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Drying Of Semiconductors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Abstract
Description
一実施形態に係る基板処理装置1について、図1を用いて説明する。図1は、一実施形態に係る基板処理装置1の一例を示す断面模式図である。ここでは、基板処理装置1の一例として容量結合型プラズマエッチング装置を挙げて説明する。
かかる構成の基板処理装置1を用いて被エッチング膜を、異なるサイズのパターン及び異なる深さにエッチングする場合がある。その際の従来のプロセス例について図2を参照して説明する。
そこで、一実施形態に係るエッチング処理方法では、図3(b)に示すように、異なるサイズのパターンであって、異なる深さの細穴及び太穴をそれぞれのCDを寸法通りに制御しながら、細穴及び太穴を同時にエッチングする。かかるエッチング処理工程について、図4を参照しながら説明する。図4は、一実施形態に係るエッチング処理工程の一例を示す図である。
第1のエッチング工程は、図4(b)に示す細穴用のパターン5と太穴用のパターン6に被エッチング膜20をエッチングする。第1のエッチング工程は、所定の深さまで被エッチング膜20をエッチングする。所定の深さは、第1のエッチング工程にてマスク50の細穴用のパターン5にエッチングされる被エッチング膜のエッチング深さである。第1のエッチング工程は、エッチングストップ層40にて細穴のエッチングが停止するまで被エッチング膜20をエッチングする。第1のエッチング工程のプロセス条件を以下に示す。
高周波電力 HF 40MHz、1500W LF 3.2MHz、1500W
圧力 30mTorr(4.0Pa)
ガス種 C4F6ガス、O2ガス、Arガス
第1のエッチング工程の後、図4(c)に示すように、マスク50上に保護膜70を堆積する堆積工程を実行する。堆積工程は、細穴用のパターン5を閉塞させ、太穴用のパターン6を閉塞させないように保護膜70を堆積させる。例えば、堆積工程は、マスク50のパターン5,6の側壁に堆積する保護膜70の堆積量をDとしたとき(図5参照)、パターン5、6がホールの場合には式(1)が成り立つように制御される。
高周波電力 HF 1500W LF 4500W
圧力 15mTorr(2.0Pa)
ガス種 C4F6ガス、C4F8ガス、O2ガス、Arガス
ただし、ガス種は、これに限られず、CとFとを含むガスを含んでいればよい。CとFとを含むガスの一例としては、C4F6、C4F8、C5F8、C6F6などのフロロカーボンガスや、CH2F2、CH3Fなどのハイドロフロロカーボンガスが挙げられる。堆積工程では、CH4、C2H6、C2H4、C3H6などのハイドロカーボンガスを供給してもよい。さらに、Oを含むガスを添加してもよい。ガス中のOの流量を制御することにより、パターン5の閉塞の微調整が可能になる。Oを含むガスの一例としては、O2、CO、CO2が挙げられる。
第2のエッチング工程は、図4(d)に示すように、被エッチング膜20をエッチングし、太穴用のパターン6に対するエッチングを深くする。第2のエッチング工程は、被エッチング膜20を各エッチングストップ層30までエッチングする。第2のエッチング工程は、太穴用のパターン6のエッチングを行い、細穴用のパターン5のエッチングを行わない。第2のエッチング工程のプロセス条件を以下に示す。
高周波電力 HF 1500W LF 6000W
圧力 30mTorr(4.0Pa)
ガス種 C4F6ガス、C3F8ガス、O2ガス、Arガス
第2のエッチング工程の間、細穴側のパターン5は保護膜70により閉塞されている。これにより、細穴がオーバーエッチングされることで、隣接する細穴が繋がってショートしたり、エッチングストップ層40を踏み外す(図3(c)のA、B)ことを防止し、図4(d)のCに示すように、細穴を適正なCD値に制御することができる。
一実施形態に係るエッチング処理方法では、例えば、図5に示すように、マスク50は、太穴用のパターン6が形成されたマスクパターンの第1領域と、細穴用のパターン5が形成されたマスクパターンの第2領域とを有する。このマスク50を使用して被エッチング膜20を異なるパターンに同時にエッチングし、細穴と太穴とを同時に形成する。このとき、細穴用のパターン5の凹部のCD1と、太穴用のパターン6の凹部のCD2との間に、CD1≦2×D<CD2の関係式が成り立つように、パラメータを調整し、マスク50のパターンの側壁に堆積する保護膜70の堆積量Dを制御する。これにより、堆積工程において、細穴用のパターン5を閉塞させ、太穴用のパターン6を閉塞させないように制御することができる。
高周波電力 HF 1500W LF 4500W
圧力 15mTorr(2.0Pa)
ガス種 CH2F2ガス、C4F8ガス、Arガス
基板温度 10℃
以下では、堆積工程の処理時間を調整する例を挙げて、一実施形態に係るエッチング処理について、図8を参照しながら説明する。図8は、一実施形態に係るエッチング処理方法の一例を示すフローチャートである。図8のエッチング処理は、制御部100により制御される。
CD1≦2×D1、且つ2×D2<CD2
これにより、マスク50のパターンの側壁に堆積する保護膜70の堆積量D1および堆積量D2を制御することとなる。
以上に説明したエッチング処理方法を、基板処理装置1にて実行した結果の一例について、図10を参照しながら説明する。図10は、一実施形態に係るエッチング処理方法を実行したときの実験結果の一例を示す図である。なお、本実験においては、図8のステップS11における予め定められた所定回数は1回である。
図4(b)では、細穴がエッチングストップ層40にてエッチングを停止するまで、エッチング処理を実行したが、これに限られない。
例えば、変形例1に係るウェハWは、図11(a)に示すように、細穴用のパターン5と太穴用のパターン6のマスク50の下に被エッチング膜20を形成し、その下にエッチングストップ層30を形成する構造を有する。エッチングストップ層30は、細穴用のパターン5と太穴用のパターン6の下方にて同じ高さに一体的に設けられる。かかる変形例1のウェハWの構成においても、上記の3工程を有するエッチング処理方法を使用することができる。
変形例2では、細穴及び太穴でターゲットとするエッチングの深さが異なる。変形例2に係るウェハWは、図12(a)に示すように、図11(a)の変形例1に係るウェハWの構造と同じであるため、ここでは説明を省略する。
上記実施形態及び変形例1,2に係るエッチング処理方法にて実行する第1のエッチング工程、堆積工程及び第2のエッチング工程は、真空を破らず、大気に暴露されることなく、すなわち真空を維持したまま実行することができる。大気に暴露されることなく実行する方法としては、同一のチャンバで実行してもよいし、同一の処理システムで(In−Situで)実行してもよい。ただし、第1のエッチング工程、堆積工程及び第2のエッチング工程は、別々のチャンバで実行してもよい。
2 チャンバ
5 細穴用のパターン
6 太穴用のパターン
10 シリコン基板
20 被エッチング膜
21 下部電極
22 上部電極
32、34 高周波電源
30、40 エッチングストップ層
50 マスク
70 保護膜
100 制御部
Claims (18)
- 被エッチング膜の上に第1の開口の凹部及び第2の開口の凹部のパターンを有するマスクが形成された基板をエッチングする処理方法であって、
所定の深さまで前記被エッチング膜をエッチングする第1のエッチング工程と、
前記第1のエッチング工程の後、前記マスクの上に保護膜を堆積する堆積工程と、
前記堆積工程の後、前記被エッチング膜をエッチングする第2のエッチング工程と、を含み、
前記第1の開口は、前記第2の開口より小さく、
前記堆積工程は、前記第1の開口の凹部を閉塞させ、前記第2の開口の凹部を閉塞させない、
エッチング処理方法。 - 前記第2のエッチング工程は、
前記第1の開口の凹部を閉塞させながら、前記第2の開口の凹部をエッチングする、
請求項1に記載のエッチング処理方法。 - 前記堆積工程において、前記第1の開口の凹部及び前記第2の開口の凹部のパターンの側壁に堆積する前記保護膜の堆積量をDとしたとき、次式が成り立つように前記保護膜を堆積する、
前記第1の開口の凹部の直径又は溝の幅≦2×D<前記第2の開口の凹部の直径又は溝の幅
請求項1又は2に記載のエッチング処理方法。 - 前記堆積工程において、前記第1の開口の凹部のパターンの側壁に堆積する前記保護膜の堆積量をD1とし、前記第2の開口の凹部のパターンの側壁に堆積する前記保護膜の堆積量をD2としたとき、次の2式が同時に成り立つように前記保護膜を堆積する、
前記第1の開口の凹部の直径又は溝の幅≦2×D1、且つ、
2×D2<前記第2の開口の凹部の直径又は溝の幅
請求項1又は2に記載のエッチング処理方法。 - 前記堆積工程において、前記第2の開口の凹部のパターンの底部に堆積する前記保護膜の堆積量は、前記第2の開口の凹部のパターンの上部および上部側壁に堆積する前記保護膜の堆積量より少ない、もしくは堆積されない、
請求項1〜4のいずれか一項に記載のエッチング処理方法。 - 前記堆積工程において、前記第1の開口の凹部のパターンの側壁及び前記第2の開口の凹部のパターンの側壁に堆積する前記保護膜の形状は、オーバーハング形状である、
請求項1〜5のいずれか一項に記載のエッチング処理方法。 - 前記堆積工程と前記第2のエッチング工程とを1回以上繰り返す、
請求項1〜6のいずれか一項に記載のエッチング処理方法。 - 前記第1のエッチング工程における前記所定の深さは、前記第1のエッチング工程にて前記マスクの前記第1の開口の凹部のパターンにエッチングされる被エッチング膜のエッチング深さである、
請求項1〜7のいずれか一項に記載のエッチング処理方法。 - 前記基板は、前記被エッチング膜の下に第1の下地膜と第2の下地膜とを有し、
前記第1の下地膜は、第1の開口の凹部のパターンの下方にあり、
前記第2の下地膜は、第2の開口の凹部のパターンの下方にあり、
前記第1の開口の凹部と前記第1の下地膜の間の被エッチング膜の膜厚は、
前記第2の開口の凹部と前記第2の下地膜の間の被エッチング膜の膜厚より薄い、
請求項1〜8のいずれか一項に記載のエッチング処理方法。 - 前記第1の開口の凹部のパターンにエッチングされる前記被エッチング膜のエッチング深さは、前記第2の開口の凹部のパターンと前記第2の下地膜の間の被エッチング膜の膜厚より浅い、
請求項9に記載のエッチング処理方法。 - 前記基板は、前記被エッチング膜の下に第1の下地膜と第2の下地膜とを有し、
前記第1の下地膜は、第1の開口の凹部のパターンの下方にあり、
前記第2の下地膜は、第2の開口の凹部のパターンの下方にあり、
前記第1の開口の凹部と前記第1の下地膜の間の被エッチング膜の膜厚は、
前記第2の開口の凹部と前記第2の下地膜の間の被エッチング膜の膜厚と同じである、
請求項1〜8のいずれか一項に記載のエッチング処理方法。 - 前記第1の開口の凹部のパターンにエッチングされる前記被エッチング膜のエッチング深さは、前記第2の開口の凹部のパターンと前記第2の下地膜の間の被エッチング膜の膜厚と同じである、
請求項11に記載のエッチング処理方法。 - 前記第1の開口の凹部のパターンにエッチングされる前記被エッチング膜のエッチング深さは、前記第2の開口の凹部のパターンと前記第2の下地膜の間の被エッチング膜の膜厚と異なる、
請求項11に記載のエッチング処理方法。 - 前記第1の下地膜と前記第2の下地膜とは、エッチングストップ層である、
請求項9〜13のいずれか一項に記載のエッチング処理方法。 - 前記堆積工程は、
前記第2のエッチング工程において、前記被エッチング膜との選択比を有する膜を保護膜として堆積する、
請求項1〜14のいずれか一項に記載のエッチング処理方法。 - 前記第1のエッチング工程、前記堆積工程及び前記第2のエッチング工程は、大気に暴露されることなく実行される、
請求項1〜15のいずれか一項に記載のエッチング処理方法。 - 前記第1のエッチング工程、前記堆積工程及び前記第2のエッチング工程は、同一のチャンバ又は同一の処理システムで実行される、
請求項16に記載のエッチング処理方法。 - 基板のエッチングを行うチャンバと、制御部とを有する基板処理装置であって、
前記制御部は、
被エッチング膜の上に第1の開口の凹部及び第2の開口の凹部のパターンを有するマスクが形成された基板を前記チャンバ内に準備し、
所定の深さまで前記被エッチング膜のエッチングを行い、
前記エッチングを行った後、前記マスクの上に保護膜を堆積し、
前記保護膜を堆積した後、前記被エッチング膜のエッチングを行い、
前記第1の開口は、前記第2の開口より小さく、
前記保護膜の堆積は、前記第1の開口の凹部を閉塞させ、前記第2の開口の凹部を閉塞させないように制御する、
基板処理装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW108143087A TW202036714A (zh) | 2018-12-06 | 2019-11-27 | 蝕刻處理方法及基板處理裝置 |
KR1020190158700A KR20200069236A (ko) | 2018-12-06 | 2019-12-03 | 에칭 처리 방법 및 기판 처리 장치 |
US16/704,129 US11264248B2 (en) | 2018-12-06 | 2019-12-05 | Etching method and substrate processing apparatus |
CN201911244697.6A CN111293041A (zh) | 2018-12-06 | 2019-12-06 | 蚀刻处理方法和基板处理装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018229304 | 2018-12-06 | ||
JP2018229304 | 2018-12-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2020096174A true JP2020096174A (ja) | 2020-06-18 |
JP7346218B2 JP7346218B2 (ja) | 2023-09-19 |
Family
ID=71084114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2019183953A Active JP7346218B2 (ja) | 2018-12-06 | 2019-10-04 | エッチング処理方法及び基板処理装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US11264248B2 (ja) |
JP (1) | JP7346218B2 (ja) |
KR (1) | KR20200069236A (ja) |
TW (1) | TW202036714A (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11824099B2 (en) * | 2020-06-15 | 2023-11-21 | Taiwan Semiconductor Manufacturing Co., Ltd. | Source/drains in semiconductor devices and methods of forming thereof |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0228330A (ja) * | 1988-07-18 | 1990-01-30 | Fujitsu Ltd | 半導体装置の製造方法 |
JPH09148270A (ja) * | 1995-11-21 | 1997-06-06 | Sony Corp | エッチング方法及び半導体装置の製造方法 |
US6025276A (en) * | 1998-09-03 | 2000-02-15 | Micron Technology, Inc. | Semiconductor processing methods of forming substrate features, including contact openings |
JP2011238704A (ja) * | 2010-05-07 | 2011-11-24 | Renesas Electronics Corp | 半導体装置および半導体装置の製造方法 |
JP2012015268A (ja) * | 2010-06-30 | 2012-01-19 | Fujitsu Semiconductor Ltd | 半導体装置の製造方法及び半導体装置 |
JP2014090022A (ja) * | 2012-10-29 | 2014-05-15 | Tokyo Electron Ltd | プラズマ処理方法及びプラズマ処理装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6218268B1 (en) * | 1998-05-05 | 2001-04-17 | Applied Materials, Inc. | Two-step borophosphosilicate glass deposition process and related devices and apparatus |
US6368974B1 (en) * | 1999-08-02 | 2002-04-09 | United Microelectronics Corp. | Shrinking equal effect critical dimension of mask by in situ polymer deposition and etching |
US7994002B2 (en) | 2008-11-24 | 2011-08-09 | Applied Materials, Inc. | Method and apparatus for trench and via profile modification |
US9543148B1 (en) * | 2015-09-01 | 2017-01-10 | Lam Research Corporation | Mask shrink layer for high aspect ratio dielectric etch |
US20170178899A1 (en) * | 2015-12-18 | 2017-06-22 | Lam Research Corporation | Directional deposition on patterned structures |
US20190096751A1 (en) * | 2017-09-26 | 2019-03-28 | Microchip Technology Incorporated | Dual Damascene Process for Forming Vias and Interconnects in an Integrated Circuit Structure |
-
2019
- 2019-10-04 JP JP2019183953A patent/JP7346218B2/ja active Active
- 2019-11-27 TW TW108143087A patent/TW202036714A/zh unknown
- 2019-12-03 KR KR1020190158700A patent/KR20200069236A/ko active Search and Examination
- 2019-12-05 US US16/704,129 patent/US11264248B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0228330A (ja) * | 1988-07-18 | 1990-01-30 | Fujitsu Ltd | 半導体装置の製造方法 |
JPH09148270A (ja) * | 1995-11-21 | 1997-06-06 | Sony Corp | エッチング方法及び半導体装置の製造方法 |
US6025276A (en) * | 1998-09-03 | 2000-02-15 | Micron Technology, Inc. | Semiconductor processing methods of forming substrate features, including contact openings |
JP2011238704A (ja) * | 2010-05-07 | 2011-11-24 | Renesas Electronics Corp | 半導体装置および半導体装置の製造方法 |
JP2012015268A (ja) * | 2010-06-30 | 2012-01-19 | Fujitsu Semiconductor Ltd | 半導体装置の製造方法及び半導体装置 |
JP2014090022A (ja) * | 2012-10-29 | 2014-05-15 | Tokyo Electron Ltd | プラズマ処理方法及びプラズマ処理装置 |
Also Published As
Publication number | Publication date |
---|---|
US20200185229A1 (en) | 2020-06-11 |
KR20200069236A (ko) | 2020-06-16 |
TW202036714A (zh) | 2020-10-01 |
US11264248B2 (en) | 2022-03-01 |
JP7346218B2 (ja) | 2023-09-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR102283949B1 (ko) | 주기적 에칭 프로세스를 이용하여 에칭 스톱 층을 에칭하기 위한 방법들 | |
KR101029947B1 (ko) | 플라즈마 에칭 성능 강화를 위한 방법 | |
US7977390B2 (en) | Method for plasma etching performance enhancement | |
US20040072443A1 (en) | Method for plasma etching performance enhancement | |
US8609547B2 (en) | Plasma etching method and computer-readable storage medium | |
US8609549B2 (en) | Plasma etching method, plasma etching apparatus, and computer-readable storage medium | |
KR20190037341A (ko) | 원하는 피쳐를 얻기 위해 에칭 프로세싱 중에 ulk 물질을 손상으로부터 보호하기 위한 제조 방법 | |
KR20030087637A (ko) | 유기계 절연막의 에칭 방법 및 이중 상감 방법 | |
KR102617192B1 (ko) | 질화 실리콘으로 형성된 제 1 영역을 산화 실리콘으로 형성된 제 2 영역에 대하여 선택적으로 에칭하는 방법 | |
JP4008352B2 (ja) | 絶縁膜のエッチング方法 | |
KR20040021613A (ko) | 드라이 에칭 방법 | |
JP4351806B2 (ja) | フォトレジストマスクを使用してエッチングするための改良技術 | |
TW202004902A (zh) | 基板處理方法及基板處理裝置 | |
CN111223775A (zh) | 蚀刻方法和基板处理装置 | |
US20230335409A1 (en) | Substrate processing method and substrate processing apparatus | |
JP7346218B2 (ja) | エッチング処理方法及び基板処理装置 | |
US20080014755A1 (en) | Plasma etching method and computer-readable storage medium | |
US11121000B2 (en) | Etching method and substrate processing apparatus | |
JP7158252B2 (ja) | プラズマエッチング方法及びプラズマエッチング装置 | |
US20090206053A1 (en) | Plasma etching method, plasma etching apparatus, control program and computer-readable storage medium | |
JP2022116742A (ja) | 基板処理方法および基板処理装置 | |
JP2021028968A (ja) | 基板および基板処理方法 | |
CN111293041A (zh) | 蚀刻处理方法和基板处理装置 | |
US20230343598A1 (en) | Method For Improving Etch Rate And Critical Dimension Uniformity When Etching High Aspect Ratio Features Within A Hard Mask Layer | |
US11688609B2 (en) | Etching method and plasma processing apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20220706 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20230518 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20230613 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20230626 |
|
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: 20230808 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20230906 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 7346218 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |