WO2004061526A1 - アルカリ溶解型リソグラフィー用ギャップフィル材形成組成物 - Google Patents
アルカリ溶解型リソグラフィー用ギャップフィル材形成組成物 Download PDFInfo
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- WO2004061526A1 WO2004061526A1 PCT/JP2003/016735 JP0316735W WO2004061526A1 WO 2004061526 A1 WO2004061526 A1 WO 2004061526A1 JP 0316735 W JP0316735 W JP 0316735W WO 2004061526 A1 WO2004061526 A1 WO 2004061526A1
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- 241000894007 species Species 0.000 description 1
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- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 239000004408 titanium dioxide Substances 0.000 description 1
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- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- YIYBQIKDCADOSF-ONEGZZNKSA-N trans-pent-2-enoic acid Chemical compound CC\C=C\C(O)=O YIYBQIKDCADOSF-ONEGZZNKSA-N 0.000 description 1
- ZFDIRQKJPRINOQ-UHFFFAOYSA-N transbutenic acid ethyl ester Natural products CCOC(=O)C=CC ZFDIRQKJPRINOQ-UHFFFAOYSA-N 0.000 description 1
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- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
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- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
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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
- H01L21/02104—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
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/094—Multilayer resist systems, e.g. planarising layers
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- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
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- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- 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
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- 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
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- 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
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- 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
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/76224—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials
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- 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
- H01L21/76808—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 intermediate temporary filling with material
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- 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
- H01L21/02282—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process liquid deposition, e.g. spin-coating, sol-gel techniques, spray coating
Definitions
- the present invention relates to a novel composition for forming a gap fill material for lithography. More specifically, it has excellent flatness on uneven substrates such as holes and trenches, is soluble in an alkaline aqueous solution, can be etched back with an alkaline aqueous solution, and can be used for printing with a photoresist layer.
- An object of the present invention is to provide a gap fill material for lithography in which no mixing occurs and an excellent resist pattern can be obtained. More particularly, the present invention relates to a gap-fill material forming composition for lithography used in a dual damascene process for introducing a wiring material Cu (copper) used for reducing a wiring delay of a semiconductor device in recent years.
- anti-reflection film Bottom Anti-Refective Coating, BARC
- BARC Bottom Anti-Refective Coating, BARC
- Known anti-reflective films include inorganic anti-reflective films such as titanium, titanium dioxide, titanium nitride, chromium oxide, carbon dioxide, ⁇ -silicon, and organic anti-reflective films composed of a light absorbing substance and a polymer compound. I have.
- the former is vacuum deposition equipment for film formation, CVD While the equipment such as equipment and sputtering equipment is required, the latter is advantageous because it does not require special equipment, and many studies have been conducted.
- an acryl resin type anti-reflection film having a hydroxyl group and a light absorbing group as a cross-linking reactive group in the same molecule or a novolak resin type anti-reflective film having a hydroxyl group and a light absorbing group as a cross-linking reactive group in the same molecule. And the like (for example, see Patent Documents 1 and 2).
- Desirable properties of the organic anti-reflective coating material include high absorbance to light and radiation, no intermixing with the photoresist layer (insoluble in the photoresist solvent), There is no low molecular diffusion material from the anti-reflective coating material into the overcoated photoresist during heating and drying, and it has a higher dry etching rate than photoresist (for example, Non-Patent Document 1, Non-Patent Document 2). , Non-Patent Document 3.).
- the wiring material Cu is the wiring material Cu.
- the technology introduced to change the wiring material from the current A1 to Cu is a dual damascene process (for example, see Patent Document 3). In this process, an antireflection film is used on a substrate having a larger aspect ratio (irregularity) than that of a conventional substrate made of wiring material A1. .
- the characteristics required for the anti-reflection film material for the dual damascene process are to control the coverage of the anti-reflection film on the underlying substrate around the hole in addition to the characteristics described above. Further, when the antireflection film is applied with a constant film thickness, the antireflection film has a large absorbance to light and radiation, and has a high flatness that does not depend on the uneven shape of the substrate.
- the gap fill material is a gap-firing material, that is, a filler or a flattening material.
- a gap-fill material forming composition using a polymer solution effective for a dual damascene process is known (for example, see Patent Document 4). Also, certain filling compositions are known (see, for example, Patent Document 5).
- a gap-fill material composition is applied to a substrate having irregularities such as holes, baked, and a gap-fill material layer is formed. That is, the etch back is performed.
- a gap fill material layer having a desired film thickness can be obtained by the etch pack, and the surface of the gap fill material layer can be highly flattened.
- a photo resist layer is formed directly on the gap fill material layer or after an anti-reflection film layer is formed, and thereafter, the substrate is processed by a lithography process.
- the etch back is performed by dry etching.
- Patent Document 2 US Pat. No. 5,693,691
- Patent Document 3 US Patent No. 6057239
- Patent Document 4 International Publication No. 02/05035 Pamphlet
- Patent Document 5 JP-A-2002-47430
- Non-Patent Document 1 Tom Lynch and 3 others, “Properties and Performance of Controller UV Ray Reflectance Controller” ”, (USA), India Vance-In-Registration Tetanoguchi G & Processing XI (in Advance sin Re sist Tec hn ology and Processing XI), edited by Omkaram Naramasu (Procedures of SP IE), 1994, Vol. 2195, Vol. 2195 (Vol. 21 95), p. 225-229
- Non Patent Literature 2 G. Taylor (G. Tay 1 or) and 13 others, “Metnacrylate Resistant Anti-Reflective Coating Four 93 nm Lsog Ffy (93 nm L) ithography) ",
- the characteristics required of the gap-fill material for enabling the etch-back with such an alkaline aqueous solution include the ability to flatten a substrate having a large aspect ratio (irregularity), the gap-fill material.
- the layer has an appropriate solubility in an alkaline aqueous solution (etch pack property), and the gap fill material layer after the etch back is insoluble in the solvent used in the antireflection film or the photoresist composition (the antireflection film).
- excellent flatness on a substrate having irregularities such as holes and trenches it is soluble in an alkaline aqueous solution, can be etched back by an alkaline aqueous solution, and has an interface with a photoresist layer.
- a novel composition for forming a gap fill material for lithography for forming a gap fill material layer for lithography that does not cause mixing and provides an excellent resist pattern.
- a gap-fill material forming composition for lithography used in a dual damascene process for introducing a wiring material Cu (copper) used to reduce wiring delay of a semiconductor device. Disclosure of the invention
- a semiconductor by a method in which a substrate having a hole having an aspect ratio represented by height / diameter of 1 or more is coated with a photoresist and an image is transferred onto the substrate using a lithography process.
- a gap-filling material forming composition comprising a polymer having a hydroxyl group or a carboxyl group and a crosslinking agent, which is used in the manufacture of the device and is coated on the substrate before coating with the photoresist;
- the gap-fill material forming composition according to the first aspect wherein the polymer has a weight average molecular weight of 500 to 300,000.
- a polymer having a hydroxyl group or a carboxyl group in the main chain As a third point of view, a polymer having a hydroxyl group or a carboxyl group in the main chain.
- the gapped gap filler material shape forming composition described in the eleventh aspect which is a polymerized composite containing a single unit and turned back
- the above-mentioned polypolymer may have a hydroxyl group or a powerful lulupopoxysilyl group in a side chain.
- the material of the gear gear cap described in the eleventh viewpoint which is a polymerized polymer containing a repeating unit containing a single unit.
- the above-mentioned polypolymer is formed by repeating the above-mentioned polyacrylic acid or memethacrylic acid and repeating the process.
- the gear gear cap file described in the eleventh viewpoint which is a polymerized polymer including the unit as Material type formed forming sets compositions formed thereof was ,
- the above-mentioned polypolymer is preferably a hydroxyacrylic acid hydroxyhydroxyl alkesteryl ester or a metahydracrylic acid hydrohydroxyl hydroxyalkyl.
- the gyajatta described in the eleventh viewpoint which is a polymerized polymer mixture containing lulu estester as a unit by repeating the process, is described. Pulp filler material forming composition composition,
- the above-mentioned polystyrene is a dexdextrin triester estetellur compound and is described in the eleventh aspect.
- a gig geared filler material forming composition composition
- the polypolymer obtained by the above-mentioned popolylimer is a compound obtained by repeating hydrohydroxycis styrylene repetition and containing it as a single unit.
- the above-mentioned popolylimer does not have an aromatic aromatic ring structure within its structure.
- Any one of the eleventh viewpoint to the seventy-seventh viewpoint is described in any one of the following.
- the crosslinked bridging agent according to the present invention is characterized in that the bridging agent has at least 22 bridged bridging agents.
- the composition for forming a gigap cap file material described in the eleventh aspect which is a crosslinkable crosslinking agent having a functional group, ,
- the eleventh aspect to the 1100th aspect which further contains an Aarluca calori-dissolved dissolution rate adjustment agent for controlling the rate of dissolution.
- an Aarluca calori-dissolved dissolution rate adjustment agent for controlling the rate of dissolution.
- the 11th 22nd viewpoints may be any of the 11th viewpoints to the 11th viewpoints, and may be any one of the 11th viewpoints.
- Manufacturing and manufacturing of a semi-conductor device mounting apparatus by applying, coating, and sintering a material composition forming composition composition on a base substrate plate; Method of forming the shape of the gypsum file material layer used in the fabrication, ...
- any one of the 11th viewpoint to the 11th 11th viewpoint can be used.
- the concentration is from 00..11 %% to
- the solution dissolution rate for an aqueous solution of Aalluca calori water that is 222200%% is 33- 3322000 nn mm / sec. ⁇ ⁇ ⁇ ⁇ . . -
- the invention of the present invention is intended to provide a flattened base plate with a flat flattening property, and is intended for use in a litho-sografographic glass plate.
- the present invention relates to a composition composition for forming a gap filler material for forming a layer of gap filler material. . Departure
- the layer of the gear gear cap material obtained from the composition composition is the flatness of the base plate. It has a high etching rate as well as a moderate alkali dissolution rate for etch back with an alkaline aqueous solution.
- the gap fill material layer according to the present invention can fill and flatten the unevenness of the substrate having holes, and can improve the flatness by performing etch-back with an alkaline aqueous solution.
- the uniformity of the thickness of a coating film such as a photoresist applied thereon can be improved.
- the composition for forming a gap fill material of the present invention has a high dry etching rate as compared with a photoresist layer, does not cause intermixing with the photoresist layer, and prevents diffusion into the photoresist during heating and drying. No excellent lithographic gap fill material layer can be obtained.
- the gap fill material layer formed from the gap fill material forming composition of the present invention can be etched back with an aqueous solution of an aqueous solution, the process from the formation of the gap fill material layer to the formation of the photoresist layer can be performed by a coat and developer device ( (Coating and developing equipment). As a result, the step of moving to a dry etching apparatus, which is conventionally required for etch back, can be omitted. Therefore, production efficiency can be improved by using the gap fill material composition of the present invention.
- FIG. 1 is a schematic view showing a manufacturing process using the composition for forming a gap fill material of the present invention
- FIG. 2 is a view showing a gap fill material layer after etch back with an alkaline aqueous solution.
- a) is a substrate
- (b) is a gap-fill material layer before etch-back with an alkaline aqueous solution
- (c) is a gap-fill material layer after etch-pack with an alkaline aqueous solution
- (d) is an antireflection film.
- E shows a photoresist layer.
- a photoresist is coated on a substrate having a hole having an aspect ratio represented by a height Z diameter of 1 or more, and an image is transferred onto the substrate using a lithography process.
- Forming a gap-fill material which is used in the manufacture of a semiconductor device by a copying method and contains a polymer having a hydroxyl group or a carboxyl group and a bridging agent coated on the substrate before coating with a photoresist; It relates to a composition.
- the present invention also relates to a gap fill material forming composition for lithography used in a dual damascene process for introducing a wiring material Cu (copper) used for reducing a wiring delay of a semiconductor device.
- the gap fill material forming composition of the present invention basically comprises a polymer having a hydroxyl group or a carboxyl group, a cross-linking agent and a solvent, and optionally includes a cross-linking catalyst, a surfactant, an alkali dissolution rate modifier and the like. Including.
- the solid content of the gap fill material forming composition of the present invention is, for example, 0.1 to 70% by mass, 0.1 to 50% by mass, and, for example, 0.5 to 50% by mass. .
- the solid content is a value obtained by removing the solvent component from all components of the gap fill material forming composition.
- the content of the polymer component having a hydroxyl group or a carboxyl group in the gap fill material forming composition of the present invention is, for example, 1 to 99% by mass, for example, 20 to 80% by mass in the solid content.
- the content is, for example, 30 to 70% by mass.
- the polymer in the gap-fill material forming composition of the present invention include: an addition-polymerizable polymer produced from a monomer having an addition-polymerizable unsaturated bond such as acrylate / hydroxystyrene; a polyester; a polyimide; a polycarbonate; Various polymers such as polycarbamate, polyamide, condensation polymerizable polymer such as phenol resin, and dextrin ester compound can be used.
- the polymer contains a hydroxyl group or a carboxyl group in its structure.
- examples of such polymers include polymers in which carboxyl groups and hydroxyl groups are directly bonded to carbon atoms constituting the polymer main chain, such as polyacrylic acid and polybutyl alcohol, and poly (2-hydroxyxethyl).
- Various types of polymers, such as methacrylate, can be used, such as polymers having a hydroxyl group or a carboxyl group bonded to the side chain bonded to the polymer main chain.
- the polymer in the present invention can be produced by polymerization of a monomer having an addition-polymerizable unsaturated bond containing a hydroxyl group or a carboxyl group.
- Examples of such a monomer having an addition-polymerizable unsaturated bond include, for example, acrylic Acid, methacrylic acid, hydroxystyrene, 4-bierbenzyl alcohol, 2-hydroxyxethyl acrylate, 2-hydroxypropyl methacrylate, vinylanoleconore, 2-hydroxyxenolevinole , 4-hydroxyptinorebininoleatenole, 4 mono-oleboxyl styrene, vinylinoleate, pentenoic acid, 3-butene 1-1-one, crotonic acid, 4-maleimidoptanoic acid, N- (2-hydroxyethyl Maleimide, etc. can be mentioned.
- One of these monomers can be used for the production of the polymer of the present invention, and two or more monomers can be used in combination.
- the polymer of the present invention can also be produced by polymerizing the above-mentioned monomer having an addition-polymerizable unsaturated bond containing a hydroxyl group or a carboxyl group with the above-mentioned monomer having no hydroxyl group or carboxylic acid group, or having an addition-polymerizable unsaturated bond. You can do it.
- monomers containing no hydroxyl group or carboxyl group and monomers having an addition-polymerizable unsaturated bond By combining monomers containing no hydroxyl group or carboxyl group and monomers having an addition-polymerizable unsaturated bond, the resulting polymer dissolution rate in aqueous alkali solution, glass transition temperature, solubility in solvents, dry etching It is possible to adjust the speed, the adhesion to the underlying substrate, the resist boiling, and the like.
- Examples of such a monomer having an addition-polymerizable unsaturated bond not containing a hydroxyl group or a carboxyl group include acrylic esters, methacrylic esters, crotonic esters, acrylamides, methacrylamides, and styrene. , Vinyl ethers, vinyl esters, maleimides and the like.
- acrylates examples include alkyl acrylates such as methyl acrylate, ethyl acrylate, isopropyl acrylate, hexyl acrylate, cyclohexyl acrylate, benzyl acrylate, and acrylic acid (2-phenylene).
- alkyl acrylates such as methyl acrylate, ethyl acrylate, isopropyl acrylate, hexyl acrylate, cyclohexyl acrylate, benzyl acrylate, and acrylic acid (2-phenylene).
- Aralkyl esters such as aralkyl acrylates, phenyl acrylate, and naphthyl acrylate.
- methacrylates include methyl methacrylate, alkyl methacrylate such as methyl methacrylate, ethyl methacrylate, isoptyl methacrylate, pentyl methacrylate, and cyclohexyl methacrylate, benzyl methacrylate, and methacrylate (2-phenyl; c-nyletyl).
- Aralkyl methacrylates such as aralkyl methacrylate, phenyl methacrylate, and naphthyl methacrylate; You.
- crotonates examples include alkyl crotonates such as methyl crotonate, ethyl crotonate, isopropyl crotonate, hexyl crotonate, cyclohexyl crotonate, and glycerin monotonate, and croton.
- alkyl crotonates such as methyl crotonate, ethyl crotonate, isopropyl crotonate, hexyl crotonate, cyclohexyl crotonate, and glycerin monotonate, and croton.
- aralkyl crotonates such as benzyl and crotonic acid (2-phenylethyl), and aryl crotonates such as phenyl crotonate and naphthyl crotonate.
- acrylamides examples include acrylamide, 2-acrylamide 2-methyl-1-propanesulfonic acid, (3-acrylamidepropyl) trimethylammonium chloride, acrylamide methylcellulose acetate butyrate, and the like. .
- methacrylamides examples include methacrylamide, 2-methacrylamide 2-methyl-1-propanesulfonic acid, (3-methacrylamide propyl) trimethylammonium chloride, and methacrylamide methylcellulose acetate butyrate. No.
- styrenes examples include 4-methylenstyrene, ⁇ -methynolestyrene, chlorostyrene, bromostyrene, fluorostyrene, cyanostyrene, acetinolestyrene, methoxystyrene, 4-bulbenzamide, 4-methylbenzoate, etc. Can be listed.
- biel ethers examples include ethyl butyl ether, 2-methoxethyl benzoyl ether, 2-chloroethyl vinyl ether, 2-methoxypropylene, ⁇ -(2-vinyloxyshethyl) pyridine, hexyl vinyl ether, and triethylene. Glycol methyl butyl ether and the like.
- beer esters examples include butyl acetate, butyl acetate, trifluoroacetate butyl ester, hexyl beer ester butyl butyrate, butyl isobutyrate, and vinyl trimethyl acetate.
- Maleimides include maleimide, ⁇ -Fuelmaleimide, ⁇ -methinolemaleimid, ⁇ -ethynolemaleimide, ⁇ -propynolemaleimide, ⁇ -benzylmaleimide, ⁇ -hexylmaleimide, ⁇ - Petinole maleimide and the like.
- monomers having an addition-polymerizable unsaturated bond such as maleic anhydride, acrylonitrile, ester, and ether can be used.
- the addition polymerizable polymer in the present invention may be any of a random polymer, a block polymer or a graft polymer.
- the polymer constituting the composition for forming a gap fill material for lithography of the present invention can be synthesized by a method such as radical polymerization, anion polymerization, and cationic polymerization.
- the form can be produced by a method such as solution polymerization, suspension polymerization, emulsion polymerization, or bulk polymerization.
- polyesters containing hydroxyl groups or carboxyl groups polyimides, polycarbonates, polycarbamates, polyamides, phenolic resins, and the like, condensation-polymerizable polymers, and dextrin ester compounds may be used.
- polyesters containing hydroxyl groups or carboxyl groups polyimides, polycarbonates, polycarbamates, polyamides, phenolic resins, and the like, condensation-polymerizable polymers, and dextrin ester compounds may be used.
- a phenol resin is obtained by polycondensing a phenol and an aldehyde in the presence of an acid catalyst.
- the phenols used at this time include, for example, phenol, 0
- aldehydes polycondensed with the above phenols include formaldehyde, trioxane, paraformaldehyde, benzaldehyde, acetoaldehyde, propyl aldehyde, phenol aldehyde, ⁇ -phenylpropyl aldehyde Hyd, j3-phenynopropyl aldehyde, o-hydroxybenzaldehyde, m-hydroxybenzaldehyde, p-hydroxybenzaldehyde, o-black benzanoledaldehyde, m-black Nsanoledaldehyde, p-Black Benzaldehyde, o-Nitrobenzaldehyde, m-Nitrobenzaldehyde, p-Nitrobenzaldehyde, o-Methylbenzaldehyde, m-Methylbenzaldehyde, p —
- Dextrin is a high molecular weight compound having many hydroxyl groups and has low solubility in organic solvents. Therefore, it is difficult to use the composition for forming a gap fill material using an organic solvent.
- the dextrin ester compound used in the gap fill material forming composition of the present invention has improved solubility in an organic solvent by esterifying a hydroxyl group of dextrin.
- the dextrin ester compound used in the gap fill material forming composition of the present invention is such that at least 50% of the hydroxyl groups of the dextrin is an ester group represented by the formula (1). Dextrin ester compound.
- the dextrin ester compound used in the gap-fill material forming composition of the present invention comprises at least 60% or at least 70% of the hydroxyl groups of the dextrin with an ester group represented by the formula (1). Dextrin ester compound You.
- a phenyl group, a naphthyl group or an anthryl group which may be substituted with a chlorine atom, a bromine atom, a iodine atom or an alkoxycarbonyl group having 1 to 6 carbon atoms.
- Examples of the alkyl group include a methyl group, an ethyl group, an isopropyl group, a normal pentyl group, a cyclohexyl group, and a normal octyl group.
- Examples of the alkoxy group include a methoxy group, an ethoxy group, an isopropyloxy group, and a cyclohexyloxy group.
- Examples of the alkoxycarboyl group include a methoxycarbonyl group, an ethoxycarbol group and a cyclohexyloxycarbonyl group.
- R i is a carboxymethyl group, a carboxyethyl group, a carboxybutyl group, or another such alkoxyalkyl group, or a lipoxypropyl group or a lipoxynaphthyl group. Etc. are preferred.
- the dextrin ester compound used in the composition for forming a gap fill material of the present invention can be produced, for example, as follows.
- starch is hydrolyzed to dextrin by existing methods such as acids, alkalis, enzymes, and heating.
- methods such as acids, alkalis, enzymes, and heating.
- the methods described in JP-A-48-6747 and JP-A-61-205494 can be mentioned.
- a method including alkali hydrolysis and enzyme liquefaction described in Japanese Patent Application Laid-Open No. H10-2105893 can be used.
- the molecular weight of dextrin can be adjusted by the reaction temperature, the pH of the reaction solution, and the amount of the enzyme added.
- the desired dextrin can be obtained by treatment with an ion exchange resin, purification by a separation column, reprecipitation method, or the like.
- the conversion of the dextrin thus obtained into a dextrin ester compound can be carried out using dextrin and an acid chloride, an acid bromide, a carboxy-imidazole compound, a carboxylic acid active ester compound, or a carboxylic acid derivative such as a carboxylic acid anhydride. Due to the reaction with Then, it can be carried out by converting a hydroxyl group into an ester group.
- the conversion of the hydroxyl group of dextrin to an acetoxyl group can be carried out by reacting dextrin with acetyl chloride ⁇ acetic anhydride under conditions using a base such as pyridine.
- Conversion of hydroxyl groups to ester groups includes acetic acid, propionic acid, butyric acid, cyclohexancarboxylic acid, chloroacetic acid, trifluoroacetic acid, cyanoacetic acid, ethoxyacetic acid, isobutyric acid, succinic acid, maleic acid, phthalic acid, benzoic acid Acids, bromobenzoic acid, hydroxybenzoic acid, eodobenzoic acid, nitrobenzoic acid, methylbenzoic acid, ethoxybenzoic acid, tert-butoxybenzoic acid, naphthalenecarboxylic acid, cyclonaphthalenecarboxylic acid, hydroxynaphthalenecarboxylic acid Acid chlorides, acid bromides, carbonylimidazole compounds, and carboxylic acid active ester compounds derived from carboxylic acid compounds such as anthracene carboxylic acid and the like can be used.
- anhydrides of these carboxylic acids can be used.
- the conversion of the hydroxyl group of dextrin into an ester group can also be carried out by reacting the carboxylic acid compound with dextrin in the presence of a condensing agent such as dicyclohexylcarpoimide.
- carboxylic acid derivative such as acid chloride, acid promide, carbonylimidazole compound, carboxylic acid active ester compound, and acid anhydride can be used for the conversion of the hydroxyl group to the ester group. More than one species can be used in combination.
- the rate of conversion of the dextrin to the hydroxyl group to the ester group is determined by changing the equivalents of the carboxylic acid derivatives used such as acid chloride, acid bromide, carboxy-imidazole compound, carboxylic acid active ester compound and acid anhydride. Can be adjusted.
- the residual amount of hydroxyl groups of dextrin can be measured, for example, by titration using a 1N aqueous sodium hydroxide solution and judging the end point at an inflection point of pH 8 to 11 with a pH meter.
- the dextrin ester compound used in the composition for forming a gap fill material of the present invention may have a linear structure or a branched structure. You can.
- the branched structure is derived from the branched structure of starch (amylopectin).
- the weight average molecular weight of the polymer used in the gap fill material forming composition of the present invention is, for example, 500 to 300,000, for example, 500 to 2000, and For example, it is 100000 to 1500000.
- the weight average molecular weight is less than 500, it is difficult to obtain a non-crystalline gap-fill material layer, and further, there is a high possibility of sublimation in the firing step after application of the gap-fill material forming composition. It may cause disadvantages such as insufficient formation of the fill material layer and contamination of equipment. If the weight average molecular weight is more than 3,000,000, the fluidity of the gap-fill material-forming composition is reduced, the filling of the hole formed on the substrate becomes insufficient, and pores and holes are formed in the holes. A gap may be generated, which may hinder the final processing of the substrate.
- the content of the crosslinking agent in the gap fill material forming composition of the present invention is, for example, 1 to 99% by mass, for example, 20 to 80% by mass, and, for example, 30 to 90% by mass in the solid content. 70% by mass.
- Examples of the cross-linking agent in the gap fill material forming composition of the present invention include melamine-based, substituted urea-based, and epoxy-containing polymer-based compounds.
- Preferred are compounds such as methoxymethylated glycolperyl and methoxymethylated melamine, and particularly preferred are tetramethoxymethyldalicholperil and hexamethoxymethylmelamine.
- a glycidyl ether compound is preferable, and epoxidized butanetetracarboxylic acid tetrakis is particularly preferable.
- Such a cross-linking agent causes a cross-linking reaction between the cross-linking agent components or the polymer component having a hydroxyl group or a hydroxyl group at the time of forming the gap-fill material layer by baking after applying the gap-fill material forming composition onto the substrate. This can reduce the solubility of the formed gap fill material layer in organic solvents.
- an antireflection film composition or a photoresist is formed in a later lithography process. The composition is applied.
- the gap fill material layer is an organic solvent commonly used for the antireflection film or the photoresist composition, for example, ethylene glycol monomethine oleate, ethylene glycol olemonoethylateate, Methinorecello olenoacetate, ethinorece mouth sonorebecetate, diethylene glycolone monomethine oleate, diethylene glycolone monoethylate enoate, propylene glycol, propylene diolicone monomethinoleate enolate, propylene glycoleone monomethate Propylene glycol propyl ether acetate, toluene, xylene, methinolethynoleketone, cyclopentanone, cyclohexanone, ethyl 2-hydroxypropionate, 2-hydroxy-1 2 _Ethyl methylpropionate, ethyl ethoxyacetate, ethylethyl hydroxyacetate, 2-
- the above-mentioned cross-linking reaction can prevent intermixing which causes such an adverse effect.
- the alkali dissolution rate adjusting agent is a compound capable of adjusting the dissolution rate of the gap fill material layer formed from the gap fill material forming composition in an aqueous alkali solution. By adjusting the type and amount of the alkali dissolution rate regulator, it is possible to control the dissolution rate of the gap-fill material layer in the aqueous solution.
- Examples of such an alkali dissolution rate regulator include a naphthoquinone compound, a compound containing a t-butoxycarbol group, a compound containing a hydroxyl group, a compound containing a carboxyl group, and a compound containing a phenyl.
- the amount of the alkali dissolution rate modifier to be added is 100 parts by mass or less, preferably 80 parts by mass or less, or 50 parts by mass or less based on 100 parts by mass of the polymer.
- p-toluenesulfonic acid trifluoromethanesulfonic acid, pyridinimide p-toluenesulfonic acid, salicylic acid, sulfosalicylic acid, cunic acid, Acidic compounds such as benzoic acid and hydroxybenzoic acid, and / or thermal acid generators such as 2,4,4,6-tetrahexacyclohexadienone, benzoin tosylate, and 221 ton benzodinoletosylate Can be added.
- the amount varies depending on the amount of addition, the type of polymer, the type of the crosslinking agent, the amount of addition, and the like. It is 1 to 30 parts by mass, and for example, 0.5 to 20 parts by mass.
- composition for forming a gap fill material for lithography of the present invention may be supplemented with other rheology modifiers, adhesion aids, surfactants and the like, if necessary, in addition to the above.
- the rheology modifier is added mainly for the purpose of improving the fluidity of the composition for forming a gap fill material, and particularly to increasing the filling property of the composition for forming a gap fill material into a hole in a firing step.
- Specific examples include, for example, phthalic acid derivatives such as dimethyl phthalate, diethyl phthalate, diisobutino phthalate, dihexyl phthalate, butyl isodecyl phthalate, dinormal butyl adipate, diisobutyl adipate, diisooctyl adipate, Adipic acid derivatives such as octyldecyl adipate, maleic acid derivatives such as dinormanoleptinolemalate, jetinolemalate, dinonoremalate, oleic acid derivatives such as methylolate, butylolate, tetrahydrofurfurylolate, or Stearic acid derivatives such as
- the adhesion aid is added mainly for the purpose of improving the adhesion between the substrate, the antireflection film or the photoresist layer, and the gap fill material layer formed from the gap fill material forming composition, and in particular, preventing the peeling during development. Is done.
- chlorosilanes such as trimethychlorosilane, dimethinolevinechlorosilane, methinoresphenechlorophenol, and chloromethyldimethyl chlorosilane
- Alkoxysilanes such as tyl methoxy silane, dimethyl ethoxy silane, methyl dimethoxy silane, dimethyl vinyl ethoxy silane, ⁇ -methacryloxy propyl trimethoxy silane, diphenyl dimethyl silane, phenyl triethoxy silane, hexamethyl disilazane, N , N'-Bis (trimethinoresilinole) pereas, silazanes such as dimethyltrimethylsilylamine, trimethylsilylimidazole, butyltrichlorosilane, ⁇ -clopropylpropyltrimethoxysilane, y-Rinominopropyltriethoxysilane, ⁇ _ Dalici
- a surfactant may be added to the composition for forming a gap fill material of the present invention in order to prevent the occurrence of pinhole rust and to further improve the coating property for uneven surface.
- the surfactant include polyoxyethylene alkyl ethers such as polyoxyethylene lauryl ether, polyoxyethylene stearyl enoate ether, polyoxyethylene acetyl ether, polyoxyethylene oleyl ether, and polyoxyethylene octyl phenol ether.
- Polyoxyethylene nonolequine oleanol ethers such as polyoxyethylene noninole phenol enolate ether, polyoxyethylene 'polyoxypropylene block copolymers, sonolebitan monolaurate, sorbitan monopalmitate, sorbitan monosteare Sorbitan esters such as citrate, sonorebitan monooleate, sorbitan trioleate, sorbitan restearate, polyoxyethylene sorbitan monoester Laurate, polyoxyethylene sorbitan monopalmitate, Porioki shea ethylene Sono Levi monostearate, polyoxyethylene Seo Bitantorio milled by wet Ichito, such as polyoxyethylene sorbitan tristearate Poriokishechi Nonionic surfactants such as rensorbitan fatty acid esters, etc.
- Sorbitan esters such as citrate, sonorebitan monooleate, sorbitan trioleate, sorbitan restearate, polyoxyethylene
- EF 301, EF 303, EF 352 (manufactured by Tochem Products Co., Ltd.), trade names Megafax F171, F173, R-08, R-30 (manufactured by Dainippon Ink Co., Ltd.), Florard FC430, FC431 (manufactured by Sumitomo 3LM Co., Ltd.), trade name Asahigard AG710, Surflon S-382, SC101, SC102, SC103, SC104, SC105, SC106 (manufactured by Asahi Glass Co., Ltd.), etc. And organosiloxane polymer KP 341 (manufactured by Shin-Etsu Chemical Co., Ltd.).
- the amount of these surfactants to be added is generally 0.2% by mass or less, preferably 0.1% by mass or less, based on the gap-fill material forming composition of the present invention. These surfactants may be added alone or in combination of two or more.
- the composition for forming a gap fill material of the present invention is preferably used in the form of a solution, and therefore various solvents are used.
- the solvent for dissolving the polymer, the cross-linking agent, and the like of the gap-fill material forming composition include ethylene dalicol monomethyl ether, ethylene glycol cornolemonoethylenolate ether, methinoresellosonolebu acetate, etinole cellosonolebu acetate, Diethylene glycolone monomethinoleate ether, diethylene glycolone monoethylenate ethereole, propylene glycoloneole, propyleneglyconele monomethineoleateneoleate, propylene glycolone monomethineoleateneoleate acetate, propylene glycol / lepropinoleatee Tenoreacetate, Tonolene, Xylene, Methynoletinoleketone, Cyclopentanone,
- the gap fill material forming composition of the present invention is used in a semiconductor device manufacturing process using a substrate having a hole having an aspect ratio represented by a height Z diameter of 1 or more, particularly a lithography process of a dual damascene process. .
- a process using the gap fill material forming composition of the present invention will be described.
- Substrates having holes with an aspect ratio of 1 or more, indicated by height Z diameter for example, silicon / silicon dioxide coated substrates, silicon nitride substrates, glass substrates,
- the gap fill material forming composition of the present invention is applied by an appropriate application method such as a spinner or a coater, and then fired to form a gap fill material layer (FIG. 1).
- Conditions for baking are appropriately selected from a baking temperature of 60 ° C. to 220 ° C. and a baking time of 0.3 to 120 minutes.
- an excess amount of the gap fill material forming composition is used to ensure the filling property of the gap fill material forming composition into the holes, and as a result, the formed gap fill material layer is thick. (0.01 to 5 ⁇ ⁇ as the film thickness on the substrate).
- a difference in film thickness on the substrate may occur due to the density of holes.
- an excessive amount of the gap-filling material forming composition is used to coat a thick film.
- etching that is, an etch pack is performed.
- the gap fill material layer of the present invention is soluble in an alkaline aqueous solution
- etchback is performed using an alkaline aqueous solution (step (2) in FIG. 1).
- the gap fill material layer can be adjusted to a desired thickness by selecting the type and concentration of the alkaline aqueous solution to be used or the time of the etch pack. Further, the flatness of the surface of the gap fill material layer can be enhanced by the etch pack.
- a firing step under conditions selected as appropriate from within 20 minutes can be added.
- an antireflection film layer is formed on the gap fill material layer after the etch pack (see FIG.
- the step (1) (3) and the formation of the photoresist layer (step (4) in FIG. 1) are performed, followed by exposure, development, and processing of the substrate by dry etching.
- the substrate is moved from the coat & developer unit to the dry etching unit (step (A) in Fig. 1), the etch pack by dry etching (step (2 ') in Fig. 1), and from the dry etching unit to the coat & developer unit.
- a process of moving the substrate between devices (steps (A,) in Fig. 1) was required.
- the alkaline aqueous solution used for the etch back is not particularly limited, but an alkaline aqueous solution used as a developer for a positive photoresist can be used.
- aqueous solutions of inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium metasilicate, ammonia, etc., ethylamine, n-propylamine, getylamine, triethylamine, dimethylethanolamine, triethanolamine
- Aqueous solutions of organic amines such as amines, aqueous solutions of quaternary ammonium salts such as tetramethylammonium hydroxide, choline and the like, and aqueous solutions of cyclic amines such as pyrrole and pyridine can be mentioned.
- an aqueous solution of an alcohol in which an appropriate amount of an alcohol such as isopropyl alcohol or a surfactant such as an anion is added to the aqueous solution of the alcohol may be used.
- concentration of the aqueous alkali solution to be used can be appropriately selected from, for example, those having a concentration of 0.1% to 20%.
- NMD-3 manufactured by Tokyo Ohka Kogyo Co., Ltd.
- NMD-3 manufactured by Tokyo Ohka Kogyo Co., Ltd.
- the etch-back time can be selected as appropriate from 10 seconds to 300 seconds according to the type and concentration of the aqueous solution used, the desired thickness of the gap-fill material layer, the state, etc. Can be.
- the dissolution rate in the aqueous solution is preferably 3 to 200 nm per second as a reduction rate of the film thickness, and 3 to 200 nm per second. It is preferably 100 nm, and more preferably 5 to 50 nm. If the dissolution rate is higher than this, it is difficult to control the amount of the gap-fill material layer removed by the etch pack, that is, the amount of film thickness that decreases, and if the dissolution rate is lower than this, The time required for etch packs will be longer, resulting in lower productivity.
- the dissolution rate of the gap-fill material layer in the aqueous solution is determined by the type of polymer contained in the composition used, the content of hydroxyl groups and carboxyl groups in the polymer, and the dissolution rate adjusting agent added to the composition. It can be adjusted by changing the type and the amount of addition.
- the dissolution rate of the gap-fill material layer in the aqueous solution is ultimately determined by a combination of the type of the gap-fill material forming composition, the type and the concentration of the aqueous solution.
- the gap fill material layer formed on the substrate can be formed.
- the state can be controlled.
- (S 2)) or the state of the partial fill in which a part of the hole of the substrate is filled with the gap fill material layer ((S 3) in FIG. 2) can be selected.
- the gap-fill material layer formed from the gap-fill material forming composition of the present invention is, after exposure of a photoresist, development, addition of a substrate, and the like, finally, completely. Removal, which is usually done This is performed by light etching. It is known that the rate of removal by dry etching generally decreases as the proportion of the aromatic ring structure contained in the layer to be removed increases. Therefore, in the gap fill material layer of the present invention, when it is desired to increase the removal rate by dry etching, the amount of the aromatic ring structure contained in the gap fill material forming composition used may be reduced. In particular, the amount of the aromatic ring structure contained in the polymer component may be reduced.
- a polymer having no aromatic ring structure in its structure is preferably used.
- Examples of such a polymer include a polymer produced from only a monomer selected from acrylic acid, methacrylic acid, 2-hydroxyethyl methacrylate, vinyl alcohol, and the like.
- those monomers include alkyl acrylates such as methyl acrylate, ethyl acrylate, methyl methacrylate, methyl methacrylate, isopropyl methacrylate, and hexyl methacrylate, or alkyl ester methacrylate.
- Etholenolebutinoleatenore etinolebutinoleatenole, etc.
- alkyl carboxylate vinyl ester such as vinyl acetate ester, butyrate butyl ester
- N-methylmaleimide N-cyclo Polymers produced by copolymerizing monomers selected from N-alkyl maleimides such as xyl maleimide, maleic anhydride, acrylonitrile, and the like.
- polymethacrylic acid poly (2-hydroxyethyl) methacrylate, polyvinyl alcohol, copolymerized polymer of acrylic acid and ethyl methacrylate, copolymer of vinyl alcohol and butyl vinyl ether, ethyl methacrylate and 2-hydroxyxethyl Copolymer of butyl ether, 2-hydroxypropyl methacrylate and propyl acrylate and copolymer of acrylonitrile, methacrylic acid and copolymer of 2-hydroxysethyl methacrylate and ethyl methacrylate, 2-Hydroxyshethyl methacrylate, methacrylic acid ethyl ester and maleic anhydride copolymer, methacrylic acid, 2-hydroxyshethyl methacrylate and methyl methacrylate And a copolymer of ter and N-cyclohexylmaleimide.
- a negative type or a positive type can be used, and a positive type photoresist comprising a nopolak resin and 1,2-naphthoquinonediazidesulfonic acid ester, Chemically amplified photoresist composed of a binder having a group capable of decomposing by an acid to increase the alkali dissolution rate and a photoacid generator, and a low molecular compound decomposed by an acid and increasing the alkali dissolution rate of the photoresist, Chemically amplified photoresist composed of a soluble binder and a photoacid generator, a binder having a group that decomposes with acid to increase the alkali dissolution rate, and a small molecule that decomposes with acid to increase the alkali dissolution rate of the photoresist Examples include chemically amplified photoresists consisting of compounds and photoacid generators.
- An antireflection film layer may be applied and formed on the gap fill material layer in the present invention before applying and forming a photoresist.
- the antireflection coating composition used therefor is not particularly limited, and can be arbitrarily selected from those conventionally used in a lithography process.
- the antireflection film can be formed by coating and baking with a spinner or a coater.
- Examples of the antireflective coating composition include, for example, those having a light-absorbing compound, a resin and a solvent as main components, a resin having a light-absorbing group linked by a chemical bond, a cross-linking agent and a solvent as main components, and a light-absorbing compound.
- antireflection coating compositions can also contain an acid component, an acid generator component, a rheology modifier and the like, if necessary.
- the light absorbing compound any compound can be used as long as it has a high absorptivity to light in the photosensitive characteristic wavelength region of the photosensitive component in the photoresist provided on the antireflection film. Examples include benzophenone compounds, benzotriazole compounds, azo compounds, naphthalene compounds, anthracene compounds, anthraquinone compounds, and triazine compounds.
- the resin examples include polyester, polyimide, polystyrene, novolak resin, polyacetal resin, and (meth) acrylic resin.
- the resin having a light-absorbing group linked by a chemical bond examples include resins having a light-absorbing aromatic ring structure such as an anthracene ring, a naphthalene ring, a benzene ring, a quinoline ring, a quinoxaline ring, and a thiazole ring.
- the substrate to which the gap fill material forming composition of the present invention is applied is mainly a substrate commonly used in the manufacture of a semiconductor device having a hole having an aspect ratio represented by height / diameter of 1 or more (for example, Silicon silicon dioxide coated substrate, silicon nitride substrate, glass substrate, ITO substrate, etc.). However, it can be used to flatten the surface of a substrate having a hole with an aspect ratio smaller than 1 or a substrate having a step. Also, it can be used for a substrate having no steps. These substrates may have an inorganic antireflection film formed on the surface layer by a CVD method or the like, and the composition for forming a gap fill material of the present invention may be applied thereon. You can also.
- the gap fill material layer formed from the gap fill material forming composition of the present invention may also have absorption for the light depending on the wavelength of the light used in the lithography process. In such a case, It can function as a layer having an effect of preventing light reflected from the substrate.
- the gap fill material layer of the present invention is a layer for preventing the interaction between the substrate and the photoresist, preventing the material used for the photoresist or the substance generated at the time of exposing the photoresist from adversely affecting the substrate. It can also be used as a layer having a function and a layer having a function of preventing a substance generated from the substrate upon heating and baking into the upper photoresist and preventing adverse effects.
- the obtained solution was applied on a silicon wafer by a spinner. Heating was performed on a hot plate at 120 ° C for 1 minute to form a gap fill material layer for lithography (film thickness 1.1 ⁇ m).
- This gap-fill material layer was immersed in a 2.38% aqueous solution of tetramethylammonium hydroxide for a predetermined time, and the alkali dissolution rate was measured. As determined from the immersion time and the decrease in film thickness, the dissolution rate of the gap fill material layer was 18 nm / sec.
- the obtained solution was applied on a silicon wafer by a spinner. Baking was performed at 120 ° C for 1 minute and then at 205 ° C for 1 minute on a hot plate to form a gap fill material layer (film thickness 1.0.urn).
- This gap finole material layer can be used as a solvent for photoresists, such as ethyl lactate, and propylene glycol monomethyl. It was immersed in ether and confirmed to be insoluble in the solvent.
- the obtained solution was applied to a silicon wafer having holes (diameter 0.1811, depth 1. ⁇ ) by a spinner. Heating was performed at 120 ° C for 1 minute on a hot plate to form a gap fill material layer for lithography (film thickness 1.1 ⁇ ). Using a scanning electron microscope (SEM), the flatness of the gap fill material layer for lithography was evaluated by observing the cross-sectional shape of the silicon wafer substrate having the holes in which the gap fill material layer was formed. . The hole filling property of the obtained gap fill material layer for lithography was good without generating holes, gaps and the like in the holes.
- the lithographic gap-fill material layer applied and formed on the silicon wafer having holes is immersed in 2.38% tetramethylammonium hydroxide aqueous solution for 55 seconds, and then placed on a hot plate at 205 ° C1. Heated for minutes.
- SEM scanning electron microscope
- the obtained solution was applied on a silicon wafer by a spinner.
- the substrate was heated on a hot plate at 145 ° C for 1 minute to form a gap fill material layer for lithography (B thick 1.0 ⁇ ).
- the gap finole material layer was immersed in a 2.38% aqueous solution of tetramethylammonium hydroxide for a predetermined period of time, and the dissolution rate was measured. As determined from the immersion time and the amount of decrease in film thickness, the dissolution rate of the gap fill material layer was 5.0 nm per second.
- the obtained solution was applied on a silicon wafer by a spinner. Heating was performed at 135 ° C for 1 minute on a hot plate to form a gap fill material layer for lithography (film thickness: 1.0 ⁇ ).
- This gap filler / metal layer was immersed in a 2.38% aqueous solution of tetramethyl / ammonium hydroxide for a predetermined time, and the alkali dissolution rate was measured. As determined from the immersion time and the decrease in the film thickness, the dissolution rate of the gap fill material layer was 9.0 nm / sec.
- the obtained solution was applied on a silicon wafer by a spinner. Heating was performed on a hot plate at 135 ° C for 1 minute, or at 144 ° C for 1 minute, and then at 205 ° C for 1 minute to form a gap-fill material layer (1,0 ⁇ ).
- This gap-fill material layer was immersed in a solvent used for the photoresist, for example, ethyl lactate, and then propylene glycol monomethyl ether, and was confirmed to be insoluble in the solvent.
- the obtained solution was applied by a spinner onto a silicon wafer having holes (0.13 m in diameter, 0.8 ⁇ m in depth). Heating was performed at 120 ° C for 1 minute on a hot plate to form a gap fill material layer (thickness: 1. ⁇ ). Using a scanning electron microscope (S ⁇ ), the flatness of the gap fill material layer for lithography was evaluated by observing the cross-sectional shape of one substrate of a silicon wafer with a hole in which a gap fill material layer was formed. . The hole filling property of the obtained gap fill material layer for lithography was good without generating holes, gaps and the like in the holes.
- Dextrin ester compound GS-A c 2 (Terminal group ratio of dextrin: 2-carboxyethylcarbonyloxy group 2.5%, hydroxyl group 17.5%, acetoxy group 80%, weight-average molecule 7400, manufactured by Gunei Chemical Industry Co., Ltd.) at a solid concentration of 49.6% was added to 20.0 g of a solution of ethyl lactate in tetramethoxymethylbenzogua.
- the obtained solution was applied on a silicon wafer by a spinner. Heating was performed at 175 ° C for 1 minute on a hot plate to form a gap fill material layer for lithography (film thickness 1.0 ⁇ ⁇ ).
- This gap-fill material layer was immersed in a 2.38% aqueous solution of tetramethylammonium hydroxide for a predetermined period of time, and the dissolution rate of the aluminum alloy was measured. When determined from the immersion time and the decrease in film thickness, the dissolution rate of the gap fill material layer was 50 nm / sec.
- the obtained solution was applied on a silicon wafer by a spinner. Heating was performed at 175 ° C for 1 minute and then at 205 ° C for 1 minute on a hot plate to form a gap-fill material layer (film thickness: 1.0 ⁇ ).
- This gap fill material layer was immersed in a solvent used for the photoresist, for example, ethyl lactate, and propylene glycol monomethyl ether, and it was confirmed that the material was insoluble in the solvent.
- the obtained solution was applied on a silicon wafer having holes (0.13 / zm in diameter, 0.8 ⁇ in depth) by a spinner. 1 7 5 on a hot plate. C was heated for 1 minute to form a gap-fill material layer (1,0 ⁇ in thickness).
- the flatness of the gap fill material layer for lithography was evaluated by observing the cross-sectional shape of one substrate of a silicon wafer having a hole in which the gap fill material layer was formed using a scanning electron microscope (S ().
- S (S () scanning electron microscope
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Abstract
Description
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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JP2004564524A JP4210858B2 (ja) | 2002-12-26 | 2003-12-25 | アルカリ溶解型リソグラフィー用ギャップフィル材形成組成物 |
KR1020057011811A KR101158297B1 (ko) | 2002-12-26 | 2003-12-25 | 알칼리 용해형 리소그라피용 갭 필링재 형성조성물 |
CN2003801073531A CN1732410B (zh) | 2002-12-26 | 2003-12-25 | 碱溶解型光刻用形成填隙材料的组合物 |
US10/540,389 US7361718B2 (en) | 2002-12-26 | 2003-12-25 | Alkali-soluble gap fill material forming composition for lithography |
EP03768236.6A EP1586945B1 (en) | 2002-12-26 | 2003-12-25 | Alkali-soluble gap filling material forming composition for lithography |
AU2003292809A AU2003292809A1 (en) | 2002-12-26 | 2003-12-25 | Alkali-soluble gap filling material forming composition for lithography |
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WO2004061526A1 true WO2004061526A1 (ja) | 2004-07-22 |
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PCT/JP2003/016735 WO2004061526A1 (ja) | 2002-12-26 | 2003-12-25 | アルカリ溶解型リソグラフィー用ギャップフィル材形成組成物 |
Country Status (8)
Country | Link |
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US (1) | US7361718B2 (ja) |
EP (1) | EP1586945B1 (ja) |
JP (1) | JP4210858B2 (ja) |
KR (1) | KR101158297B1 (ja) |
CN (1) | CN1732410B (ja) |
AU (1) | AU2003292809A1 (ja) |
TW (1) | TW200421037A (ja) |
WO (1) | WO2004061526A1 (ja) |
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WO2005043248A1 (ja) * | 2003-10-30 | 2005-05-12 | Nissan Chemical Industries, Ltd. | デキストリンエステル化合物を含有する下層膜形成組成物 |
WO2006049046A1 (ja) * | 2004-11-01 | 2006-05-11 | Nissan Chemical Industries, Ltd. | シクロデキストリン化合物を含有するリソグラフィー用下層膜形成組成物 |
EP1718697A1 (en) * | 2004-02-23 | 2006-11-08 | Molecular Imprints, Inc. | Materials for imprint lithography |
JP2009534710A (ja) * | 2006-04-18 | 2009-09-24 | インターナショナル・ビジネス・マシーンズ・コーポレーション | 湿式現像可能な底面反射防止膜組成物及びその使用方法 |
US7837921B2 (en) | 2004-01-23 | 2010-11-23 | Molecular Imprints, Inc. | Method of providing desirable wetting and release characteristics between a mold and a polymerizable composition |
US8142703B2 (en) | 2005-10-05 | 2012-03-27 | Molecular Imprints, Inc. | Imprint lithography method |
US8152511B2 (en) | 2003-06-17 | 2012-04-10 | Molecular Imprints, Inc. | Composition to reduce adhesion between a conformable region and a mold |
JP2016028416A (ja) * | 2014-07-04 | 2016-02-25 | ローム アンド ハース エレクトロニック マテリアルズ エルエルシーRohm and Haas Electronic Materials LLC | ギャップ充填方法 |
WO2017191767A1 (ja) * | 2016-05-02 | 2017-11-09 | 日産化学工業株式会社 | 特定の架橋剤を含む保護膜形成組成物及びそれを用いたパターン形成方法 |
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JP4221610B2 (ja) * | 2003-02-21 | 2009-02-12 | 日産化学工業株式会社 | アクリル系ポリマーを含有するリソグラフィー用ギャップフィル材形成組成物 |
KR100586165B1 (ko) * | 2003-12-30 | 2006-06-07 | 동부일렉트로닉스 주식회사 | 바닥 반사 방지 코팅 방법 |
US20050170638A1 (en) * | 2004-01-30 | 2005-08-04 | Bang-Ching Ho | Method for forming dual damascene interconnect structure |
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JP2006133315A (ja) * | 2004-11-02 | 2006-05-25 | Matsushita Electric Ind Co Ltd | 平坦化材料、反射防止膜形成材料、及びこれらを用いた半導体装置の製造方法 |
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CN101506736B (zh) * | 2006-08-28 | 2013-07-10 | 日产化学工业株式会社 | 含有液体添加剂的形成抗蚀剂下层膜的组合物及下层膜形成方法、半导体装置制造方法 |
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US11592747B2 (en) * | 2012-12-14 | 2023-02-28 | Nissan Chemical Industries, Ltd. | Resist underlayer film-forming composition comprising carbonyl-containing polyhydroxy aromatic ring novolac resin |
CN104701238B (zh) * | 2013-11-14 | 2019-10-08 | 罗门哈斯电子材料有限公司 | 间隙填充方法 |
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- 2003-12-25 CN CN2003801073531A patent/CN1732410B/zh not_active Expired - Lifetime
- 2003-12-25 AU AU2003292809A patent/AU2003292809A1/en not_active Abandoned
- 2003-12-25 KR KR1020057011811A patent/KR101158297B1/ko active IP Right Grant
- 2003-12-25 EP EP03768236.6A patent/EP1586945B1/en not_active Expired - Lifetime
- 2003-12-25 JP JP2004564524A patent/JP4210858B2/ja not_active Expired - Lifetime
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US8152511B2 (en) | 2003-06-17 | 2012-04-10 | Molecular Imprints, Inc. | Composition to reduce adhesion between a conformable region and a mold |
US8916327B2 (en) | 2003-10-30 | 2014-12-23 | Nissan Chemical Industries, Ltd. | Underlayer coating forming composition containing dextrin ester compound |
WO2005043248A1 (ja) * | 2003-10-30 | 2005-05-12 | Nissan Chemical Industries, Ltd. | デキストリンエステル化合物を含有する下層膜形成組成物 |
US7837921B2 (en) | 2004-01-23 | 2010-11-23 | Molecular Imprints, Inc. | Method of providing desirable wetting and release characteristics between a mold and a polymerizable composition |
US8268220B2 (en) | 2004-01-23 | 2012-09-18 | Molecular Imprints, Inc. | Imprint lithography method |
EP2261280A1 (en) * | 2004-02-23 | 2010-12-15 | Molecular Imprints, Inc. | Process for imprint lithography |
US8076386B2 (en) | 2004-02-23 | 2011-12-13 | Molecular Imprints, Inc. | Materials for imprint lithography |
EP1718697A1 (en) * | 2004-02-23 | 2006-11-08 | Molecular Imprints, Inc. | Materials for imprint lithography |
EP1718697A4 (en) * | 2004-02-23 | 2007-03-21 | Molecular Imprints Inc | MATERIALS FOR IMPRINT LITHOGRAPHY |
JP4697467B2 (ja) * | 2004-11-01 | 2011-06-08 | 日産化学工業株式会社 | シクロデキストリン化合物を含有するリソグラフィー用下層膜形成組成物 |
US7687223B2 (en) | 2004-11-01 | 2010-03-30 | Nissan Chemical Industries, Ltd. | Underlayer coating forming composition for lithography containing cyclodextrin compound |
JPWO2006049046A1 (ja) * | 2004-11-01 | 2008-05-29 | 日産化学工業株式会社 | シクロデキストリン化合物を含有するリソグラフィー用下層膜形成組成物 |
WO2006049046A1 (ja) * | 2004-11-01 | 2006-05-11 | Nissan Chemical Industries, Ltd. | シクロデキストリン化合物を含有するリソグラフィー用下層膜形成組成物 |
US8142703B2 (en) | 2005-10-05 | 2012-03-27 | Molecular Imprints, Inc. | Imprint lithography method |
JP2009534710A (ja) * | 2006-04-18 | 2009-09-24 | インターナショナル・ビジネス・マシーンズ・コーポレーション | 湿式現像可能な底面反射防止膜組成物及びその使用方法 |
JP2016028416A (ja) * | 2014-07-04 | 2016-02-25 | ローム アンド ハース エレクトロニック マテリアルズ エルエルシーRohm and Haas Electronic Materials LLC | ギャップ充填方法 |
WO2017191767A1 (ja) * | 2016-05-02 | 2017-11-09 | 日産化学工業株式会社 | 特定の架橋剤を含む保護膜形成組成物及びそれを用いたパターン形成方法 |
JPWO2017191767A1 (ja) * | 2016-05-02 | 2019-03-07 | 日産化学株式会社 | 特定の架橋剤を含む保護膜形成組成物及びそれを用いたパターン形成方法 |
US11003078B2 (en) | 2016-05-02 | 2021-05-11 | Nissan Chemical Corporation | Compositions for forming a protective film against basic aqueous hydrogen peroxide solution, and pattern formation method |
Also Published As
Publication number | Publication date |
---|---|
KR20050094411A (ko) | 2005-09-27 |
CN1732410A (zh) | 2006-02-08 |
TW200421037A (en) | 2004-10-16 |
EP1586945A1 (en) | 2005-10-19 |
US7361718B2 (en) | 2008-04-22 |
US20060041078A1 (en) | 2006-02-23 |
CN1732410B (zh) | 2012-05-02 |
JPWO2004061526A1 (ja) | 2006-05-18 |
EP1586945A4 (en) | 2009-12-09 |
EP1586945B1 (en) | 2015-07-29 |
JP4210858B2 (ja) | 2009-01-21 |
TWI316164B (ja) | 2009-10-21 |
KR101158297B1 (ko) | 2012-06-26 |
AU2003292809A1 (en) | 2004-07-29 |
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