WO2023274771A1 - Verfahren zum herstellen einer ätzmaske, verfahren zum ätzen einer struktur in ein substrat, verwendung einer tetrelschicht und struktur zum herstellen einer maske - Google Patents
Verfahren zum herstellen einer ätzmaske, verfahren zum ätzen einer struktur in ein substrat, verwendung einer tetrelschicht und struktur zum herstellen einer maske Download PDFInfo
- Publication number
- WO2023274771A1 WO2023274771A1 PCT/EP2022/066735 EP2022066735W WO2023274771A1 WO 2023274771 A1 WO2023274771 A1 WO 2023274771A1 EP 2022066735 W EP2022066735 W EP 2022066735W WO 2023274771 A1 WO2023274771 A1 WO 2023274771A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- tetrel
- substrate
- etching
- metal layer
- Prior art date
Links
- 238000005530 etching Methods 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 85
- 239000000758 substrate Substances 0.000 title claims abstract description 84
- 229910052751 metal Inorganic materials 0.000 claims abstract description 114
- 239000002184 metal Substances 0.000 claims abstract description 114
- 230000000873 masking effect Effects 0.000 claims abstract description 65
- 238000012545 processing Methods 0.000 claims abstract description 48
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 21
- 150000003624 transition metals Chemical class 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 239000010703 silicon Substances 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 229910052804 chromium Inorganic materials 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 12
- 229910021332 silicide Inorganic materials 0.000 claims description 9
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000004544 sputter deposition Methods 0.000 claims description 8
- 238000010884 ion-beam technique Methods 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Substances [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 238000007740 vapor deposition Methods 0.000 claims description 6
- 229910052732 germanium Inorganic materials 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 229910021350 transition metal silicide Inorganic materials 0.000 claims description 5
- 238000000708 deep reactive-ion etching Methods 0.000 claims description 4
- 238000011161 development Methods 0.000 claims description 4
- 238000010894 electron beam technology Methods 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910016317 BiTe Inorganic materials 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 3
- LKTZODAHLMBGLG-UHFFFAOYSA-N alumanylidynesilicon;$l^{2}-alumanylidenesilylidenealuminum Chemical compound [Si]#[Al].[Si]#[Al].[Al]=[Si]=[Al] LKTZODAHLMBGLG-UHFFFAOYSA-N 0.000 claims description 3
- 238000004380 ashing Methods 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- PDYNJNLVKADULO-UHFFFAOYSA-N tellanylidenebismuth Chemical compound [Bi]=[Te] PDYNJNLVKADULO-UHFFFAOYSA-N 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 2
- 238000004090 dissolution Methods 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims 1
- 229910003465 moissanite Inorganic materials 0.000 claims 1
- 239000004411 aluminium Substances 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 197
- 239000011265 semifinished product Substances 0.000 description 27
- 230000008569 process Effects 0.000 description 23
- 239000011651 chromium Substances 0.000 description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 12
- 238000001020 plasma etching Methods 0.000 description 11
- 238000001459 lithography Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000013459 approach Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 229920002120 photoresistant polymer Polymers 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- 229910019974 CrSi Inorganic materials 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 239000004922 lacquer Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000003870 refractory metal Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910008484 TiSi Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000000908 ammonium hydroxide Substances 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 238000000609 electron-beam lithography Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 210000002381 plasma Anatomy 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000854350 Enicospilus group Species 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- -1 GalnAsP Chemical compound 0.000 description 1
- 229910000927 Ge alloy Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910016006 MoSi Inorganic materials 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229910006249 ZrSi Inorganic materials 0.000 description 1
- BYDQGSVXQDOSJJ-UHFFFAOYSA-N [Ge].[Au] Chemical compound [Ge].[Au] BYDQGSVXQDOSJJ-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 229910052800 carbon group element Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910021357 chromium silicide Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000002042 time-of-flight secondary ion mass spectrometry Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00436—Shaping materials, i.e. techniques for structuring the substrate or the layers on the substrate
- B81C1/00555—Achieving a desired geometry, i.e. controlling etch rates, anisotropy or selectivity
- B81C1/00563—Avoid or control over-etching
- B81C1/00579—Avoid charge built-up
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00388—Etch mask forming
- B81C1/00396—Mask characterised by its composition, e.g. multilayer 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
- H01L21/027—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
- H01L21/0332—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 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
- H01L21/027—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
- H01L21/31—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
- H01L21/32139—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer using masks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C2201/00—Manufacture or treatment of microstructural devices or systems
- B81C2201/01—Manufacture or treatment of microstructural devices or systems in or on a substrate
- B81C2201/0101—Shaping material; Structuring the bulk substrate or layers on the substrate; Film patterning
- B81C2201/0128—Processes for removing material
- B81C2201/013—Etching
- B81C2201/0132—Dry etching, i.e. plasma etching, barrel etching, reactive ion etching [RIE], sputter etching or ion milling
Definitions
- Method for making an etching mask Method for making an etching mask, method for etching a pattern in a substrate, use of a tetrel layer and pattern for making a mask
- the present approach relates to a method for producing an etching mask, a method for etching a structure in a substrate, use of a tetrel layer and a structure for producing a mask.
- Chromium film lithography is a widely used standard technology for many non-CMOS standard products as optical absorbers for a broad spectrum of wavelengths.
- Structuring technologies such as electron beam lithography or optical lithography have been known in micro and nanotechnology for years. The same applies to coating processes such as sputter deposition (sputter coating) of chromium and in some cases silicon. Dry etching processes exist, for example, in the photomask industry, where reactive ion etching of chromium and chromium oxynitride layers with chlorine-based plasma has been a common process for many years.
- An etching process with a silicide mask is known from JP H06-061 000 B2.
- Another etching process with a silicide mask is known from JP 2007-11 5830 A.
- US 5906950 A a silicide film is known.
- Another etching process with a silicide mask is known from US Pat. No. 5,001,085 A.
- EP 0 284 308 A1 is another etching process with a
- a tonality reversal is advantageously made possible without changing an expensive photomask or lacquering process.
- a shadowing and loading effect of paint edges can be reduced.
- resist webs can be produced in this way, at whose positions substrate trenches are created, which can be narrower than the resolution limit of the lithography system.
- a method for producing an etching mask comprising the following steps:
- the metal layer comprising at least one transition metal and/or aluminum or being formed from such a metal
- the tetrel layer can comprise silicon or be formed from silicon and the interdiffusion zone can be present as a transition metal silicide layer or an aluminum silicide layer.
- the substrate can be provided, for example, as a so-called wafer made of glass, quartz glass, silicon, a polymer or other materials.
- the metal layer which can be made of chromium, for example, is then applied to at least one side of the substrate.
- the metal layer can, in particular, comprise a plurality or precisely one transition metal and/or consist of a plurality or precisely one transition metal.
- Suitable transition metals can be the chemical elements with atomic numbers 21-30, 39-48 and 57-79.
- several or one non-noble transition metal can be selected.
- a metal can be described as base if its redox pairs have a negative standard potential with respect to the standard hydrogen electrode.
- the metal layer can particularly advantageously comprise a plurality or precisely one refractory metal, for example Ti, Cr, Mo and/or W, or consist of a plurality or precisely one refractory metal.
- the metal layer can likewise advantageously comprise aluminum or consist of aluminum.
- the side of the substrate covered by the metal layer is coated with the masking layer (also referred to as resist), which can be a photoresist, for example.
- the masking layer is structured, for example by exposing the photoresist.
- the masking layer is completely removed at least in one processing area, which can also be referred to as the first point, so that the underlying metal layer is uncovered.
- the side of the substrate on which the metal layer and the masking layer are arranged is additionally coated with a tetrel layer. Under a tetrel you can find an element of the fourth Understand the main group of the periodic table of elements, also referred to as the carbon group, i.e.
- Tetrels that are advantageous within the scope of the invention can be, for example, carbon (C), silicon (Si) or germanium (Ge), particularly advantageously Si.
- C carbon
- Si silicon
- Ge germanium
- the use of Si or C as a tetrel can be particularly advantageous when the metal layer is formed from a base metal, advantageously a refractory metal or aluminum, for example.
- a noble transition metal for example gold
- germanium can be selected as the tetrel, which can form a gold-germanium alloy at the interface in the interdiffusion zone.
- a tetrel layer can be a layer that comprises at least one tetrel, advantageously consists of one tetrel and particularly advantageously consists of exactly one tetrel.
- the semi-metallic tetrel and the non-metallic tetrel may be particularly suitable, while the metallic tetrel may be unsuitable.
- An interdiffusion zone is formed between the tetrel and the metal layer in the processing area where the metal layer is exposed due to the previous structuring. This interdiffusion zone can arise at an interface between the metal layer and the tetrel layer and form between the tetrel of the tetrel layer and the metal of the metal layer.
- a metal silicide layer that is to say a transition metal silicide layer or aluminum silicide layer, can be formed if silicon was selected as the tetrel.
- the interdiffusion zone can also be described as a transition zone in which the metal of the metal layer and the tetrel can be mixed. By mixed it can be understood that an alloy may be present in this transition zone.
- the alloy may include one or more mixed intermetallic phases.
- the substrate is thus uncovered in an etching area, while the substrate arranged on the processing area is passivated by the interdiffusion zone.
- alloys such as chromium silicide can differ greatly in their etching behavior from pure chromium and also from pure silicon. This also applies to contact areas such as the interdiffusion zones of two successively deposited layers.
- Such interdiffusion zones can be very thin, for example on the order of one nanometer, and still very resistant to certain etching processes. With the method presented here, such a thin interdiffusion zone can be used to advantageously some intrinsic Difficulties to overcome in lithography.
- the process flow allows a positive-negative inversion, i.e.
- a tonality change can help to resolve some specific difficulties in lithography. Assuming a positive tone resist and a given distance are used to resolve a test grid, it is usually easier to realize fine resist lines smaller than 50% of the distance, as this is offset by some overdosing during exposure or overdevelopment can be used to reduce the width of the paint stripes, and sometimes the height of the paint. Nonetheless, as one approaches the resolution limit of a lithography system, it becomes more difficult to resolve resist ridges smaller than 50% of the test grid spacing. With the method presented here, trenches smaller than 50% of the distance can advantageously be resolved.
- this method can also be used to produce effective media from non-effective media by structuring, for example optically effective media, for example chemically resistant AR layers or index gradients.
- the present invention can be used to manufacture products with CMOS technology and with other technologies.
- the method can have a step of removing the tetrel layer, in which case the interdiffusion zone can remain in the processing region, in which case the tetrel layer can be removed after the coating step and before the removal step.
- the tetrel layer can be at least partially removed in the step of removing the masking layer.
- the tetrel layer and additionally or alternatively the masking layer with the tetrel layer can be removed by an etching process.
- the removal step can differ from the usual lift-off processes, since the Tetrel layer can be removed selectively from the lacquer strip.
- no silicon flakes or fences remain.
- the Tetrel layer can be removed wet-chemically using potassium hydroxide (KOH) and additionally or alternatively sodium hydroxide (NaOH) and additionally or alternatively ammonium hydroxide (NH4OH) and additionally or alternatively an organic basic etchant. That Using these or similar etchants has the advantage that the removal step can be carried out inexpensively.
- KOH potassium hydroxide
- NaOH sodium hydroxide
- NH4OH ammonium hydroxide
- the masking layer in the structuring step, can be structured by exposure and development and additionally or alternatively by means of an electron beam.
- the masking layer can be a positive resist or a negative resist. These can be exposed in the structuring step, for example using an exposure mask, and then developed.
- a method step can be carried out inexpensively.
- the structuring can also be carried out by means of electron beam lithography. The main advantage of using an electron beam is that structures with significantly smaller dimensions, for example in the nanometer range, can be produced than with photolithography.
- the masking layer in the removal step, can be removed by ashing and additionally or alternatively wet-chemically and additionally or alternatively by dissolving in a solvent and additionally or alternatively by a combination of dissolution and chemical removal.
- the metal layer in the step of selective etching, can be etched by means of reactive ion beam etching (RIE) and additionally or alternatively non-reactive ion beam etching and additionally or alternatively wet-chemically with an acidic and additionally or alternatively halogen-containing etchant.
- RIE reactive ion beam etching
- the means used in the removal process and in the selective etching can be matched to the materials of the masking layer and the metal layer.
- the process can thus be optimally matched to the given circumstances and the solvents and materials available for the process.
- the metal layer can consist of titanium (Ti), zirconium (Zr), tantalum (Ta), chromium (Cr), molybdenum (Mo) and additionally or alternatively tungsten (W) or at least one of these metals include.
- the step of providing the substrate as a wafer made of glass, quartz glass, quartz single crystal, silicon (Si), germanium (Ge), BiTe, gallium arsenide (GaAs), silicon carbide (SiC), indium phosphide (InP), GalnAsP, lithium niobate (LiNb03) or a polymer are provided. They can Materials used are advantageously adapted to the existing requirements.
- the metal layer thickness can be between 1 nm and 2000 nm and additionally or alternatively the masking layer thickness between 1 nm and 500 nm and additionally or alternatively the tetrel layer thickness between 1 nm and 30 nm, in particular between 1 nm and 5 nm and 1 nm and 2 nm.
- the metal layer thickness like the masking layer thickness, can be between 20 nm and 200 nm, for example.
- a 300 nm thick lacquer layer can be used to structure a 100 nm thick Cr layer.
- resist cavities three times as deep as wide can be etched. This is not the only, but an important reason for a size-dependent etch depth or a size-dependent undercut (RIE lag).
- RIE lag size-dependent undercut
- a thinner etching mask can advantageously be produced, for example on the order of one or two nanometers.
- effects such as shadowing or the so-called loading effect of the paint side walls can be greatly reduced.
- stress can be avoided by introducing dense properties into the substrate. This can be an advantage compared to alternative jackets with functional layers, especially for bend-sensitive products.
- the tetrel layer can be applied so thinly that the applied tetrel merges completely in the interdiffusion zone at the processing areas. Then the surface there can be free of pure tetrel.
- the metal layer can be applied by sputtering or vapor deposition in the application step, and additionally or alternatively the substrate can be coated with the tetrel layer by sputtering or vapor deposition in the coating step.
- time and costs can be saved by using such known methods.
- the method can have a step of cleaning the surface of the uncovered processing region, it being possible for the cleaning step to be carried out after the structuring step and before the coating step.
- cleaning can take place by means of dry etching, in particular sputter etching or plasma etching or plasma-free thermal gas etching.
- a surface of the structured masking layer and of the metal layer exposed by the structuring can be optimally prepared for coating with the tetrel layer.
- a method for etching a structure in a substrate comprising a step of producing an etching mask according to a variant of the method presented above and a step of deep etching in the substrate using the etching mask.
- the structure etched into the substrate can have fine Si0 2 columnar arrays with high resolution and low exposure costs. These could be advantageous, for example, for optical immersion sensors or as metamaterials with a specific refractive index.
- a very thin hydrophobic coating over these pillars can create a lotus effect to make surfaces extremely hydrophobic.
- the columns can be made of pure S1O2 and are highly resistant to UV degradation and corrosion.
- the deep etching into the substrate can be performed by means of reactive ion etching (RIE) or deep reactive ion etching (DRIE).
- RIE reactive ion etching
- DRIE deep reactive ion etching
- the deep etching can thereby be carried out with a high degree of controllability with regard to the homogeneity, etching rate, etching profile and selectivity, corresponding, for example, to the production of topographical structures for micro and nano system technology.
- Removal of the etching mask can also advantageously be provided.
- Removing the etch mask may include removing the interdiffusion and the metal layer remaining under the interdiffusion.
- the structure etched into the substrate can be retained.
- the substrate with the structure etched into it can then be free of the metal layer. This can be particularly advantageous when an optical component is to be manufactured.
- the removal of the etch mask can be performed simultaneously with the deep etch into the substrate and/or after the deep etch into the substrate.
- the etching mask can advantageously be removed after the deep etching.
- the removal of the etching mask can already begin during deep etching.
- the interdiffusion zone can already be partially or completely removed during deep etching.
- at least part of the metal layer can be retained until the end of the deep etching, so that the masking is ensured until the end of the deep etching.
- a use of a tetrel layer is presented in the production of an auxiliary mask, which is inverted compared to a resist mask, on a metal layer for masking this metal layer, the metal layer comprising a transition metal and/or aluminum and the auxiliary mask being formed from an alloy of the tetrel with the metal, in particular from a metal silicide.
- the alloy can be present in an interdiffusion zone at an interface between the metal layer and the tetrel layer.
- the metal layer can advantageously consist of the transition metal or aluminum.
- a metal layer consisting of a single metal can have the advantage that it can be produced in a more reproducible manner.
- a structure for producing a mask comprising a substrate, a continuous metal layer of at least one transition metal or aluminum arranged on the substrate, a structured masking layer arranged on the metal layer with at least one processing region at which the masking layer is interrupted.
- the metal layer in the processing area is superficially covered with an interdiffusion zone that includes an alloy of the transition metal or aluminum with a tetrel, in particular wherein the alloy includes silicon.
- Material of the metal layer which is not alloyed with Tetrel can be arranged between the interdiffusion zone and the substrate. This material can represent a tetrel-free portion of the metal layer in the processing area.
- the layer thickness of the interdiffusion zone can be between 1 nm and 10 nm, advantageously between 1 nm and 5 nm and particularly advantageously between 1 nm and 3 nm.
- the interdiffusion zone can therefore advantageously only be formed superficially on the metal layer, while the metal layer can have an essentially uniform layer thickness inside and outside the processing area. .
- an alloy formed in the interdiffusion zone of the metal with the tetrel can only be present at the interrupted points in the masking layer.
- the masking layer can be arranged directly on the metal layer, while there is no material of the masking layer in the processing areas.
- a structure for producing a mask can be understood as a semi-finished product with which a mask can be produced.
- the mask can be made from the pattern to make a mask by removing the masking layer.
- This mask can be regarded as an auxiliary mask inverted with respect to the masking layer. With the mask made from this stock, a pattern can be etched into the substrate to produce a desired product.
- the methods presented can be implemented, for example, in software or hardware or in a mixed form of software and hardware, for example in a control unit.
- the approach presented here also creates a device that is designed to carry out, control or implement the steps of a variant of a method presented here in corresponding devices.
- the object on which the invention is based can also be achieved quickly and efficiently by this embodiment variant of the invention in the form of a device.
- the device can have at least one computing unit for processing signals or data, at least one memory unit for storing signals or data, at least one interface to a sensor or an actuator for reading in sensor signals from the sensor or for outputting data or control signals to the Have actuator and / or at least one communication interface for reading or outputting data that are embedded in a communication protocol.
- the arithmetic unit can be, for example, a signal processor, a microcontroller or the like, the memory unit being a flash memory, an EEPROM or a can be magnetic storage unit.
- the communication interface can be designed to read in or output data wirelessly and/or by wire, wherein a communication interface that can read in or output wire-bound data can, for example, read this data electrically or optically from a corresponding data transmission line or output it to a corresponding data transmission line.
- a device can be understood to mean an electrical device that processes sensor signals and, depending thereon, outputs control and/or data signals.
- the device can have an interface that can be configured as hardware and/or software.
- the interfaces can be part of a so-called system ASIC, for example, which contains a wide variety of functions of the device.
- the interfaces can be separate integrated circuits or to consist at least partially of discrete components.
- the interfaces can be software modules which are present, for example, on a microcontroller alongside other software modules.
- FIG. 1 shows a flowchart of an embodiment of a method for producing an etching mask
- FIG. 2 shows a flowchart of an exemplary embodiment of a method for producing an etching mask
- FIG. 3 shows a schematic representation of an exemplary embodiment of various process steps in the method for producing an etching mask in comparison to conventional process steps
- 4 shows a schematic representation of a structure for producing an etching mask before the application of the tetrel layer
- 5 shows a schematic representation of a structure for producing an etching mask after the application of the tetrel layer
- FIG. 6 shows a schematic representation of a structure for producing an etching mask in the stage of an auxiliary mask
- FIG. 8 shows a schematic representation of a structure etched into a substrate by means of the etching mask
- FIG. 9 is a top perspective view of a structure etched into a substrate compared to another structure etched into a substrate;
- FIG. 10 shows a flowchart of an embodiment of a method for etching a structure into a substrate
- FIG. 11 shows a block diagram of an embodiment of a device for driving a method for etching a structure in a substrate.
- FIG. 12 shows a schematic representation of an exemplary embodiment of various process steps in the method for producing an etching mask.
- FIG. 13 shows a structure for producing an etching mask.
- FIG. 14 shows another structure for making an etching mask.
- FIG. 1 shows a flow chart of an embodiment of a method 100 for producing an etching mask.
- the method 100 includes a step 105 of providing a substrate, which is, by way of example only, a silicon carbide wafer.
- the substrate can also be formed with glass, quartz glass, quartz monocrystal, silicon (Si), germanium (Ge), BiTe, gallium arsenide (GaAs), indium phosphide (InP), GaInAsP or a polymer.
- the step 105 of providing is followed by the step 110 of applying a metal layer to the substrate, the metal layer comprising a transition metal or aluminum, which in this embodiment is chromium (Cr).
- the metal layer can also be made of titanium (Ti), zirconium (Zr), tantalum (Ta), molybdenum (Mo) and additionally or alternatively tungsten (W) and additionally or alternatively aluminum or comprise at least one of these metals .
- the metal layer in this exemplary embodiment has a metal layer thickness of 30 nm purely by way of example. In other exemplary embodiments, the metal layer thickness can be between 1 nm and 200 nm.
- the metal layer is applied by vapor deposition. In other exemplary embodiments, the metal layer can also be applied by means of sputtering.
- a step 115 of applying a masking layer to the substrate coated with the metal layer follows.
- a photoresist layer with positive resist is used as a masking layer, the masking layer having a masking layer thickness of 100 nm, merely by way of example.
- the masking layer thickness can be between 1 nm and 500 nm.
- the masking layer is patterned, with the metal layer being uncovered in a processing region.
- the structuring takes place 120 by exposing and developing the positive resist layer.
- the structuring can also be carried out using an electron beam.
- the substrate is coated with a tetrel layer, the tetrel layer being formed from silicon in this exemplary embodiment.
- the tetrel layer can additionally or alternatively have other elements of main group IV and additionally or alternatively be formed only partially from silicon.
- the tetrel layer has a tetrel layer thickness of 6 nm, merely by way of example, and is applied by means of sputtering.
- the Tetrel layer can be between 1 nm and 30 nm thick and can be applied by vapor deposition.
- an interdiffusion zone between the transition metal or aluminum and the tetrel forms at the processing area at an interface between the metal layer and the tetrel layer.
- a transition metal silicide layer of Cr 3 Si is formed, merely by way of example.
- a step 130 of removing the masking layer follows, with the tetrel layer also being at least partially removed in this exemplary embodiment.
- the interdiffusion zone remains.
- the masking layer is removed by dissolving it in a solvent.
- the removal step can also be carried out by ashing and, additionally or alternatively, wet-chemically and additionally or alternatively by a combination of dissolving and chemical removal.
- a step 135 of selectively etching the metal layer is carried out by means of reactive ion beam etching (RIE) only by way of example.
- RIE reactive ion beam etching
- non-reactive ion beam etching can additionally or alternatively be used.
- the selective etching can also and additionally or alternatively take place wet-chemically with an acidic and additionally or alternatively halogen-containing etchant.
- FIG. 2 shows a flow chart of an embodiment of a method 100 for producing an etching mask.
- the method 100 presented here corresponds or is similar to the method described in the previous figure, with the difference that it has additional steps.
- step 120 of patterning the masking layer is followed by a step 200 of cleaning the surface of the exposed processing area. Only after cleaning will this Embodiment carried out the step 125 of coating the substrate with the Tetrel layer.
- the step 125 of coating in this exemplary embodiment is followed by a step 205 of removing the tetrel layer.
- the interdiffusion zone remains in the processing area.
- the Tetrel layer is removed wet-chemically using potassium hydroxide (KOH).
- the removing step may additionally or alternatively use sodium hydroxide (NaOH) and additionally or alternatively use ammonium hydroxide (NhUOH) and additionally or alternatively use an organic basic etchant.
- FIG. 3 shows a schematic representation of an exemplary embodiment of various process steps in the method for producing an etching mask, as has been described in the preceding figures, in comparison to conventional process steps.
- the difference between the conventional structuring strategy is shown in the left-hand column A and the process steps of the method described in the previous figures for producing an etching mask for tonality reversal in the right-hand column B.
- Both columns A and B are at the top of the one shown here Figure shows a semi-finished product A1 and B1 with the same shape.
- the semi-finished products A1 and B1 each comprise a substrate 300, which is a silicon wafer only by way of example, the substrate 300 being coated in each case with a metal layer 305, which is a layer made of chromium, only by way of example.
- a masking layer 310 is arranged on the metal layer 305, which is embodied as a photo-positive resist layer in this exemplary embodiment.
- the semi-finished products A1 and B1 are imaged during a step of structuring the masking layer, as was described in the previous figures, and correspondingly under the influence of an exposure 315.
- the development of the exposed masking layer 310 results in the structuring of the same, with the metal layer 305 being uncovered in a processing region 320, as illustrated in the illustration shown here using the semifinished products A2 and B2. So far, neither the semi-finished products A1 and B1 nor the semi-finished products A2 and B2 show a difference to each other. The difference in the manufacturing processes can only be seen from the semi-finished product B3 shown in column B on the right.
- the semi-finished product B3 is coated with an additional tetrel layer 325 along the masking layer 310 and in the processing region 320 along the metal layer 305, which is made of silicon in this exemplary embodiment and has a tetrel layer thickness of only 10 nm, for example.
- an interdiffusion zone 330 between the transition metal or optionally the aluminum and the tetrel forms at the processing region 320 at an interface between the metal layer 305 and the tetrel layer 325 .
- a semi-finished product B4 after a partial removal of the Tetrel layer 325 is shown in the right-hand column B under the semi-finished product B3.
- the Tetrel layer 325 is selectively removed except for the interdiffusion zone 330, leaving no silicon flakes or fences.
- a semi-finished product B5 is shown in the representation shown here, in which the masking layer 310 has been removed.
- the semi-finished product B5 still has the interdiffusion zone 330 .
- the semi-finished product B6 shown below the semi-finished product B5 is shown in the representation shown here in contrast to a semi-finished product A6 shown in the left-hand column A. While the substrate 300 is exposed exclusively in the processing region 320 on the semi-finished product A6 by RIE etching with a resist mask, this is exactly the opposite in the case of the semi-finished product B6. Here the substrate 300 is uncovered in a first etching region 335 and a second etching region 340 , while etching of the metal layer 305 in the processing region 320 has been avoided by the interdiffusion zone 330 .
- the masking layer is removed only now, as shown with reference to semi-finished product A7. Subsequently, it is probably possible to transfer the pattern to the substrate 300, as shown in the semi-finished products A8 and B8. As a result, the semi-finished products A8 and B8 have a pattern with inverted tonality.
- the pattern is introduced into the substrate 300 below the processing area 320, while in the semi-finished product B8 produced using the new production method presented in the previous figures, the pattern is introduced into the substrate 300 below the etching areas 335, 340.
- the stock A8 shows a chrome etch with a thick resist mask versus a very thin CrSi mask on semi-finished product B8, which avoids shadowing effects and charging effects at the resist edges.
- FIG. 4 shows a schematic representation of a structure 400 for producing an etching mask.
- the left part of the figure shows a cross-sectional view of the structure 400 and the right part of the figure shows a plan view of the structure 400.
- the structure 400 is shown during the method step of structuring described in the previous Figures 1 and 2 and includes a substrate 300 with a metal layer 305 and a patterned masking layer 310 is coated.
- the metal layer 305 is uncovered in the processing region 320 , as a result of which holes in the structure 400 are formed flat. In other words, the resist pattern after development is shown in this figure.
- a pinhole array with 10 10 holes which can also be referred to as pinholes, and a hexagonally shaped field of 600 nm, for example, was used as a demo pattern in this exemplary embodiment.
- the UV exposure was carried out with an i-line stepper.
- FIG. 5 shows a schematic representation of a structure 400 for producing an etching mask.
- the left sub-figure shows a cross-sectional view of the structure 400 and the right sub-figure shows a plan view of the structure 400.
- the structure shown here corresponds or is similar to the structure described in the previous Figure 4, with the difference that the structure 400 shown here has a additional Tetrel layer 325 is coated. In other words, this figure shows the lacquer after coating with silicon.
- FIG. 6 shows a schematic representation of a structure 400 for producing an etch mask in the stage of an auxiliary mask.
- the left sub-figure shows a cross-sectional view of the structure 400 and the right sub-figure shows a plan view of the structure 400.
- the structure shown here corresponds or is similar to the structure described in the previous Figure 4, with the difference that in the structure 400 shown here the masking layer is removed.
- the structure 400 has an interdiffusion zone 330 passivated with the Tetrel layer 325, which is arranged between etching regions 335, 340 in which the metal layer is exposed.
- this figure shows a modified Cr surface after Si etching with KOH and resist stripes.
- the surface modification shows some contrast in the SEM.
- the thickness of the modified zone is due to the Cr Surface roughness difficult to measure, but the pinholes appear more like flat holes than protrusions.
- the left sub-figure shows a cross-sectional representation of the structure 400 and the right sub-figure shows a plan view of the structure 400 etched into the substrate.
- the structure shown here corresponds or is similar to the structure described in the previous Figure 4, with the difference that the metal layer 305 is removed at the etched areas.
- the chromium after an RIE-CI etch is shown in this figure.
- the result is a reduced Cr dot diameter.
- the right image of the tilted sample shows a kind of very thin under-etched film 700 on top of the Cr dots. This could be the remaining interdiffusion zone after the undercut. The tonality inversion was created in this step.
- FIG. 8 shows a schematic representation of the structure etched into the substrate with the etching mask.
- the left sub-figure shows a cross-sectional view of the structure 400 and the right sub-figure shows a plan view of the structure 400 etched into the substrate.
- the structure shown here corresponds or is similar to the structure described in the previous Figure 4, with the difference that the substrate 300 below the etching areas 335, 340 is partially removed.
- pattern transfer to the substrate by RIE-F etching is shown.
- the proposed process was completed after transferring the pattern to the substrate using RIE-F.
- the thin layer residues from Figure 7 have disappeared. This corresponds to the etching behavior of the interdiffusion zone in fluorine-based plasmas and the ToF-SIMS analysis.
- FIG 9 shows a top perspective view of a structure 400 etched into a substrate compared to a further structure 900 etched into a substrate.
- the further structure 900 was produced using a conventional process as described and shown in the previous FIG conventional positive tone lithography and RIE with a shadow mask.
- the structure 400 is the result of the method described in the previous FIGS. 1 and 2 for producing a tonality reversal etch mask.
- the same photomask and resist process was used to create structure 400 and further structure 900 .
- the images of the conventional process flow show the samples Removal of the Cr etching mask. This is still present in the rehearsals with the inverted tonality.
- the increased bottom roughness is likely due to a particular glass substrate known to exhibit increased bottom roughness after RIE etching.
- FIG. 10 shows a flow chart of an embodiment of a method 1000 for etching a structure into a substrate.
- the method comprises a step 1005 of producing an etch mask and a step 1010 of deep etching into the substrate using the etch mask. Deep etching into the substrate is carried out by means of RIE or DRIE, purely by way of example.
- FIG. 11 shows a block diagram of an embodiment of a device 1100 for driving a method for etching a structure in a substrate.
- the device comprises a production unit 1105 for controlling production of an etching mask and an etching unit 1110 for controlling deep etching.
- the device 1100 can also be designed to control a method for producing an etching mask, as was described in the preceding FIGS. 1 and 2.
- FIG. 12 shows a schematic representation of an exemplary embodiment of various process steps in the method for producing an etching mask, as was described in the preceding FIGS. 1 and 2.
- the representation corresponds to or is similar to the process steps in the right-hand column described in FIG. 3 above.
- a particularly narrow trench is etched in the first etching region 335, as can be seen from the semifinished products B6 and B8, particularly in comparison to the process steps illustrated in the left-hand column of the previous FIG.
- FIG. 15 shows a modification of the exemplary embodiment, in which the etching mask was removed after the deep etching into the substrate, and a semifinished product or end product B9 was thus produced, which is free of the metal layer.
- FIG. 13, like representation B4 from FIG. 3, shows a structure for producing a mask.
- the interdiffusion zone 330 shown in broken lines is formed from an alloy of the transition metal or aluminum of the metal layer with a tetrel, preferably silicon, the metal layer 310 in the processing region 320 being covered with the interdiffusion zone 330 .
- the metal layer 305 is continuous, i.e. both inside and outside the processing area 320 on the substrate 300 educated.
- the masking layer 310 is interrupted in the processing region 320 . Outside the processing area, the masking layer 310 is arranged directly on the metal layer 305, while the processing area 320 is free of material of the masking layer.
- the processing area 320 with the interdiffusion zone 330 is shown here on the left and right next to the masked area of the masking layer 310 .
- Such a structure for making a mask can then be used to etch trenches in the substrate.
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Abstract
Description
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EP22737799.1A EP4364187A1 (de) | 2021-06-28 | 2022-06-20 | Verfahren zum herstellen einer ätzmaske, verfahren zum ätzen einer struktur in ein substrat, verwendung einer tetrelschicht und struktur zum herstellen einer maske |
KR1020237044916A KR102672664B1 (ko) | 2021-06-28 | 2022-06-20 | 에칭 마스크를 생성하는 방법, 구조체를 기재 내로 에칭하는 방법, 마스크를 생성하기 위한 테트렐 층 및 구조체의 용도 |
CN202280045780.4A CN117581340A (zh) | 2021-06-28 | 2022-06-20 | 制备蚀刻掩模的方法、在衬底中蚀刻结构的方法、第四族元素层的用途以及制备掩模的结构 |
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DE102021116587.3A DE102021116587B3 (de) | 2021-06-28 | 2021-06-28 | Verfahren zum Herstellen einer Ätzmaske, Verfahren zum Ätzen einer Struktur in ein Substrat, Verwendung einer Tetrelschicht |
DE102021116587.3 | 2021-06-28 |
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EP0284308A1 (de) | 1987-03-26 | 1988-09-28 | Applied Materials, Inc. | Materialien und Verfahren zum Ätzen von Wolframpolyziden unter Zuhilfenahme der Silizide als Maske |
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JPH0661000B2 (ja) | 1987-07-17 | 1994-08-10 | 富士通株式会社 | マスク製造方法 |
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WO2000017710A1 (en) * | 1998-09-17 | 2000-03-30 | Quantiscript Inc. | Fabrication of sub-micron etch-resistant metal/semiconductor structures using resistless electron beam lithography |
US20020177280A1 (en) | 2001-05-25 | 2002-11-28 | Philippe Schoenborn | Self aligned gate |
US20040023502A1 (en) * | 2002-08-02 | 2004-02-05 | Applied Materials Inc. | Undoped and fluorinated amorphous carbon film as pattern mask for metal etch |
US20040178476A1 (en) * | 2002-09-30 | 2004-09-16 | Brask Justin K. | Etching metal using sonication |
DE10355581A1 (de) | 2003-11-28 | 2005-06-30 | Advanced Micro Devices, Inc., Sunnyvale | Technik zur Herstellung einer Gateelektrode unter Anwendung einer Hartmaske |
JP2007115830A (ja) | 2005-10-19 | 2007-05-10 | Renesas Technology Corp | 半導体装置およびその製造方法 |
-
2021
- 2021-06-28 DE DE102021116587.3A patent/DE102021116587B3/de active Active
-
2022
- 2022-06-20 CN CN202280045780.4A patent/CN117581340A/zh active Pending
- 2022-06-20 WO PCT/EP2022/066735 patent/WO2023274771A1/de active Application Filing
- 2022-06-20 EP EP22737799.1A patent/EP4364187A1/de active Pending
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DE3315719A1 (de) | 1983-04-29 | 1984-10-31 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zum herstellen von strukturen von aus metallsiliziden bzw. silizid-polysilizium bestehenden doppelschichten fuer integrierte halbleiterschaltungen durch reaktives ionenaetzen |
EP0284308A1 (de) | 1987-03-26 | 1988-09-28 | Applied Materials, Inc. | Materialien und Verfahren zum Ätzen von Wolframpolyziden unter Zuhilfenahme der Silizide als Maske |
JPH0661000B2 (ja) | 1987-07-17 | 1994-08-10 | 富士通株式会社 | マスク製造方法 |
US5001085A (en) | 1990-07-17 | 1991-03-19 | Micron Technology, Inc. | Process for creating a metal etch mask which may be utilized for halogen-plasma excavation of deep trenches |
US5053105A (en) | 1990-07-19 | 1991-10-01 | Micron Technology, Inc. | Process for creating an etch mask suitable for deep plasma etches employing self-aligned silicidation of a metal layer masked with a silicon dioxide template |
US5906950A (en) | 1996-01-22 | 1999-05-25 | Micron Technology, Inc. | Selective etch process |
WO2000017710A1 (en) * | 1998-09-17 | 2000-03-30 | Quantiscript Inc. | Fabrication of sub-micron etch-resistant metal/semiconductor structures using resistless electron beam lithography |
US20020177280A1 (en) | 2001-05-25 | 2002-11-28 | Philippe Schoenborn | Self aligned gate |
US20040023502A1 (en) * | 2002-08-02 | 2004-02-05 | Applied Materials Inc. | Undoped and fluorinated amorphous carbon film as pattern mask for metal etch |
US20040178476A1 (en) * | 2002-09-30 | 2004-09-16 | Brask Justin K. | Etching metal using sonication |
DE10355581A1 (de) | 2003-11-28 | 2005-06-30 | Advanced Micro Devices, Inc., Sunnyvale | Technik zur Herstellung einer Gateelektrode unter Anwendung einer Hartmaske |
JP2007115830A (ja) | 2005-10-19 | 2007-05-10 | Renesas Technology Corp | 半導体装置およびその製造方法 |
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CN117581340A (zh) | 2024-02-20 |
EP4364187A1 (de) | 2024-05-08 |
KR20240011198A (ko) | 2024-01-25 |
DE102021116587B3 (de) | 2022-07-07 |
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