WO2006030641A1 - 反射防止膜形成用組成物およびこれを用いた配線形成方法 - Google Patents
反射防止膜形成用組成物およびこれを用いた配線形成方法 Download PDFInfo
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- WO2006030641A1 WO2006030641A1 PCT/JP2005/015907 JP2005015907W WO2006030641A1 WO 2006030641 A1 WO2006030641 A1 WO 2006030641A1 JP 2005015907 W JP2005015907 W JP 2005015907W WO 2006030641 A1 WO2006030641 A1 WO 2006030641A1
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- forming
- antireflection film
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P50/00—Etching of wafers, substrates or parts of devices
- H10P50/73—Etching of wafers, substrates or parts of devices using masks for insulating materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- G03F7/091—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers characterised by antireflection means or light filtering or absorbing means, e.g. anti-halation, contrast enhancement
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/70—Siloxanes defined by use of the MDTQ nomenclature
-
- 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
- G03F7/075—Silicon-containing compounds
- G03F7/0757—Macromolecular compounds containing Si-O, Si-C or Si-N bonds
Definitions
- the present invention relates to a composition for forming an antireflection film and a wiring forming method using the same.
- an antireflection film is often provided as a lower layer of the resist layer (Patent Document 1 below).
- an organic resin such as acrylic or imide has been conventionally used.
- an antireflection film made of acrylic resin after patterning the resist layer on the antireflection film to form a resist pattern, before patterning the substrate under the antireflection film, A process of dry etching the antireflection film using the resist pattern as a mask is required.
- Patent Document 2 discloses that a via hole is formed in an interlayer insulating film, and then the via hole is filled with a filling material, and a resist pattern is formed on the filling material layer. And etching using the resist pattern as a mask to remove the filling material in the via hole and to etch the interlayer insulating film so as to widen the groove width above the via hole, thereby forming a trench continuous with the via hole.
- a method for forming a (wiring groove) is described.
- a patent document 3 describes a gap fill material made of an organic material material that has both an embedding function and an antireflection function.
- Patent Document 4 describes a material for an antireflection film that also has an inorganic material strength.
- Patent Document 1 JP 2001-27810 A
- Patent Document 2 US Patent No. 6365529 (US6, 365, 529B1)
- Patent Document 3 Japanese Unexamined Patent Publication No. 2003-57828
- Patent Document 4 Japanese Patent Laid-Open No. 2003-502449
- the step of dry etching the antireflection film using the resist pattern as a mask is an organic substance (
- the organic material (antireflection film) is etched using the resist pattern as a mask, and the etching rates of the two are similar. That is, since the resist pattern is etched at the same time as the antireflection film is etched, it is difficult to perform the etching process efficiently. For this reason, it is necessary to form the resist pattern as a thick film, which is very important in the resist thin film accompanying the miniaturization described above.
- Patent Document 3 there is an embedding material layer having an antireflection function using an organic resin.
- an organic resin there is an etching rate problem.
- Patent Document 4 there is an antireflection film of an inorganic material, but the embedding property is not considered.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an antireflection film-forming material capable of forming an antireflection film having a large etching rate difference from a resist pattern.
- An object of the present invention is to provide an antireflection film-forming material capable of forming an antireflection film having an antireflection function and an embedding function, and a wiring formation method using the same. Means for solving the problem
- a first aspect of the present invention is (A) a composition for forming an antireflection film comprising a siloxane polymer having a light absorbing compound group.
- the second aspect of the present invention is a method of forming the antireflection film by applying the antireflection film-forming composition of the present invention on a substrate on which a hole is formed as the uppermost layer; Forming a resist layer on the antireflection film; patterning the resist layer to form a resist pattern having at least an exposed region on the hole; and using the resist pattern as a mask, the antireflection film. And etching the uppermost layer to form a trench pattern continuous with the holes on the uppermost layer, and removing the resist pattern and the antireflection film after the trench pattern is formed.
- a wiring forming method including a step of:
- composition for forming an antireflection film (material for forming an antireflection film) of the present invention it is possible to form an antireflection film having a large difference in etching rate from the resist pattern. Further, the composition for forming an antireflection film (material for forming an antireflection film) of the present invention can be applied as a material for forming a buried layer in the via-first dual damascene method. According to the wiring forming method of the present invention, an antireflection film having an antireflection function and a burying function can be formed, which is advantageous in terms of process.
- FIG. 1 shows one step in an example of a wiring forming method that is useful in the present invention.
- FIG. 2 shows a step that follows the step of FIG.
- FIG. 3 shows a step that follows the step of FIG.
- FIG. 4 shows a step that follows the step of FIG.
- FIG. 5 shows a step that follows the step of FIG.
- composition for forming an antireflective film of the present invention contains (A) a siloxane polymer having a light absorbing compound group (hereinafter sometimes referred to as component (A)).
- component (A) is a polymer whose skeleton is composed of siloxane bonds (Si-0-Si). Further, a light absorbing compound group is bonded as a substituent to the silicon in the siloxane bond.
- Siloxane polymers are generally synthesized through a hydrolysis reaction of a silane compound.
- the siloxane polymer may include a low molecular weight hydrolyzate and a condensate (siloxane oligomer) produced by a dehydration condensation reaction between molecules simultaneously with the hydrolysis reaction.
- siloxane polymer as the component (A) contains a strong hydrolyzate or condensate, it means the whole including these.
- the skeleton structure of the siloxane polymer as the component (A) is not particularly limited, but a siloxane ladder polymer is particularly preferable. The reason is that a dense film can be formed.
- the weight average molecular weight (Mw) of component (A) is not particularly limited, but it is preferable to have a force in the range of 1500-300000. ⁇ , More preferred than the force S in the range of 3000-20000, more preferably in the range of 500-15000.
- the light-absorbing compound group in the component (A) refers to the exposure light used in the exposure process for the resist layer on the antireflection film formed by using the composition for forming an antireflection film of the present invention. It refers to a group having a structure that exhibits light absorption at a wavelength.
- the wavelength of exposure light used in the resist layer exposure step is generally 250 nm or less, for example, about 157 to 248 nm.
- a group having a carbon double bond is suitable.
- a group having an aromatic ring such as a naphthalene ring, a benzene ring, a quinoline ring, a quinoxaline ring, or a thiazole ring is preferably used.
- a group having a benzene ring is preferable.
- a group obtained by removing a hydrogen atom from a benzene ring (having a substituent, V may be used) is preferable.
- a group having an anthracene ring is preferable, and for example, an anthracene ring force is preferably a group other than a hydrogen atom (which may have a substituent).
- the group having a benzene ring or an anthracene ring as the group having an aromatic ring may have a substituent.
- substituents include an alkyl group, an alkoxy group, a hydroxyl group, an amino group, an amide group, a nitro group, a carboxyl group, a sulfone group, a cyano group, and a halogen atom.
- the light absorbing compound group present in the component (A) may be one type or two or more types.
- the proportion of the light-absorbing compound group in the component (A) is not particularly limited.
- the light absorbing compound group present in the component (A) is a light absorbing compound group having a hydrophilic group. Only a part of the light absorbing compound group has a hydrophilic group. More preferably, it is a light absorbing compound group.
- the light-absorbing compound group having a hydrophilic group is a group having a structure exhibiting light absorption and a hydrophilic group. Of the hydrophilic groups, a hydroxyl group is particularly preferred.
- the light absorbing compound group having a hydrophilic group for example, a group in which a hydrophilic group is bonded to a carbon atom constituting a benzene ring, or a hydrophilic group is bonded to a carbon atom constituting an anthracene ring. Can be used. Of these, a hydroxyphenylalkyl group is preferred.
- the hydrophilic group present in component (A) may be one type or two or more types.
- the proportion of the hydrophilic group in the component (A) is not particularly limited! However, in order to obtain a good embedding improvement effect, the hydrophilic group is 10 to 90 mol% of the light absorbing compound group. It is preferable that it is bound moderately, and it is more preferable that it is bound to about 50 to 80 mol%.
- the component (A) can be synthesized by a known method. It is also possible to select and use one that can be applied as the component (A) of the present invention from among siloxane polymers that are commercially available for uses different from those for forming an antireflection film.
- ladder-type silicone polymers having a structural unit represented by the following formula (a) and a structural unit force represented by the following formula (b).
- the structural unit represented by (b) is 10 to 90 mol%, and 20 to 80 mol% is more preferable.
- the composition for forming an antireflection film of the present invention contains a siloxane polymer (hereinafter sometimes referred to as the component (B)! /) Which does not have a light absorbing compound group.
- U prefer that.
- the component (B) is not particularly limited as long as it is a polymer having a skeleton composed of siloxane bonds (Si-0-Si) and is not included in the component (A).
- the reaction product obtained by hydrolyzing at least one selected silane compound represented by (I) is used.
- the reaction product may include a low molecular weight hydrolyzate and a condensate (siloxane oligomer) produced by causing a dehydration condensation reaction between molecules simultaneously with the hydrolysis reaction.
- a condensate siloxane oligomer
- the siloxane polymer as the component (B) in the present invention includes such a hydrolyzate or condensate, the whole includes these.
- R represents a hydrogen atom or an alkyl group
- R ′ represents an alkyl group
- n represents an integer of 2 to 4.
- the plurality of Rs may be the same or different.
- a plurality of (OR ′) groups bonded to Si may be the same or different.
- the alkyl group as R is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, and more preferably a linear or branched alkyl group having 1 to 4 carbon atoms.
- the alkyl group as R ′ is preferably a linear or branched alkyl having 1 to 5 carbon atoms It is a group.
- the alkyl group as R ′ preferably has 1 or 2 carbon atoms, particularly in terms of hydrolysis rate.
- Silane compound (i) in the case where n in the general formula (I) is 4, is represented by the following general formula (II).
- R 1 R 2 , R 3 and R 4 each independently represent the same alkyl group as R.
- silane compound (ii) when n in the general formula (I) is 3 is represented by the following general formula (III).
- R 5 represents a hydrogen atom or the same alkyl group as the above R.
- R 6 , R 7 , and R 8 each independently represent the same alkyl group as R ′ above.
- Silane compound (iii) in the case where n in general formula (I) is 2 is represented by the following general formula (IV)
- R 9 and R 1C> represent a hydrogen atom or the same alkyl group as R above.
- R N and R 12 each independently represent the same alkyl group as R.
- silane compound (i) examples include tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetrabutoxysilane, tetrapentinoleoxysilane, trimethoxymonoethoxysilane, dimethoxydiethoxysilane, Triethoxymonomethoxysilane, trimethoxymonopropoxysilane, monomethoxytributoxysilane, monomethoxytripentyloxysilane, dimethoxydipropoxysilane, tripropoxymonomethoxysilane, trimethoxymonobutoxysilane, dimethoxydibutoxysilane, triethoxymono Propoxysilane, diethoxydipropoxysilane, tributoxymonopropoxysilane, dimethoxymonoethoxy monobutoxysilane, diethoxymonomethoxymonobutoxysilane, E
- Silane compound (ii) include trimethoxysilane, triethoxysilane, tripropoxysilane, tripentinoreoxysilane, dimethoxymonoethoxysilane, jetoxymonomethoxysilane, dipropoxymonomethoxysilane, dipropoxymono Ethoxysilane, dipentyloxymonomethoxysilane, dipentyloxymonoethoxysilane, dipentyloxymonopropoxysilane, methoxyethoxypropoxysilane, monopropoxydimethoxysilane, monopropoxydiethoxysilane, monobutoxydimethoxysilane, monopenti Ruoxydiethoxysilane, Methyltrimethoxysilane, Methyltriethoxysilane, Methyltripropoxysilane, Methyltripentyloxysilane, Ethyltrimethoxysilane , Ethyltrimethoxysi
- silane compound (iii) include dimethoxysilane, diethoxysilane, dipropoxysilane, dipentinole xysilane, methoxyethoxysilane, methoxypropoxysila.
- the silane compound used for the synthesis of component (B) can be appropriately selected from the above silane compounds (i) to (iii).
- the component (B) is at least a silanol. It is preferred to use the compound (ii) and the Z or silanic compound (iii). More preferably, the combination is a combination of a silanic compound (i) and a silanic compound (ii). When using the silane compound (i) and the silane compound (ii), these silane compounds (i) are used in a ratio of 90 to 10 mol% and the silane compound (ii) is 10 to 90 mol%. Within range is preferred.
- the mass average molecular weight (Mw) of the component (B) is not particularly limited, but it is 1000-300 0 women's power, 1200-2700 women's 1 girl's hair.
- the skeleton structure of the component (B) is not particularly limited, but a siloxane ladder polymer is particularly preferable.
- Component (B) is, for example, subjected to hydrolysis and condensation reaction in the presence of an acid catalyst, water, and an organic solvent of one or more selected from the above silane compounds (i) to (iii) It can be prepared by the method.
- the acid catalyst either an organic acid or an inorganic acid can be used.
- inorganic acid sulfuric acid, phosphoric acid, nitric acid, hydrochloric acid and the like can be used, among which phosphoric acid and nitric acid are preferable.
- organic acid examples include carboxylic acids such as formic acid, oxalic acid, fumaric acid, maleic acid, glacial acetic acid, acetic anhydride, propionic acid, and n-butyric acid, and organic acids having sulfur-containing acid residues.
- organic acid having a sulfur-containing acid residue examples include organic sulfonic acids, and examples of the esters include organic sulfates and organic sulfites.
- organic sulfonic acids for example, compounds represented by the following general formula (V) are preferred.
- R 13 is a hydrocarbon group which may have a substituent, and X is a sulfonic acid group.
- the hydrocarbon group as R 13 is preferably a hydrocarbon group having 1 to 20 carbon atoms.
- the hydrocarbon group may be saturated or unsaturated. It may be linear, branched or cyclic.
- hydrocarbon group of R 13 is cyclic, for example, a phenol group, a naphthyl group, an anthryl group, etc. Of these aromatic hydrocarbon groups, a phenyl group is preferred.
- One or more hydrocarbon groups having 1 to 20 carbon atoms may be bonded to the aromatic ring of the aromatic hydrocarbon group as a substituent.
- the hydrocarbon group as a substituent on the aromatic ring may be saturated or unsaturated, and may be linear, branched or cyclic.
- the hydrocarbon group as R 13 may have one or more substituents.
- substituents include halogen atoms such as fluorine atoms, sulfonic acid groups, carboxyl groups, hydroxyl groups, An amino group, a cyano group, etc. are mentioned.
- organic sulfonic acid represented by the general formula (V) nonafluorobutane sulfonic acid, methane sulfonic acid, trifluoromethane sulfonic acid, dodecyl benzene sulfonic acid are particularly preferable from the viewpoint of improving the shape at the bottom of the resist pattern. Or a mixture of these is preferred.
- the acid catalyst acts as a catalyst for hydrolyzing the silane compound in the presence of water, but the amount of water added is 1.5 per mol of the total amount of the silane compound used. A range of ⁇ 4.0 mol is preferred.
- the acid catalyst may be added after adding water, or may be prepared as an acid aqueous solution obtained by previously mixing the acid catalyst and water.
- the amount of the acid catalyst to be used should be adjusted so that the concentration in the reaction system of the hydrolysis reaction is in the range of 1 to 1000 ppm, particularly in the range of 5 to 500 ppm.
- the hydrolysis reaction is usually completed in about 5 to: LOO time. In order to shorten the reaction time, it is preferable to heat in a temperature range not exceeding 80 ° C.
- Examples of the organic solvent used in the synthesis of the siloxane polymer include methanol, ethanol, propanol, monohydric alcohols such as n -butanol, alkyl-3-methoxypropionate, and alkyl 3-ethylpropionate.
- Carboxylic acid ester ethylene glycol, diethylene glycol, propylene glycol, glycerin, trimethylol propane, hexanetriol and other polyhydric alcohols, ethylene glycol monomethyl enoenoate, ethylene glycol monomethino enoate, ethylene glycol Noremono Propinoreethenole, Ethyleneglycolenobutinoleetenore, Diethyleneglycolenomonomethyl ether, Diethyleneglycolmonoethyl ether, Diethyleneglycono Monopropyl ether, diethylene glycol monobutyl ether, propylene glycol one Honoré mono-methylol Honoré ether Honoré, propylene glycol Honoré monomethyl E Chino les ether Honoré, propylene glycol Monohydric ethers of polyhydric alcohols such as monopropyl ether, propylene glycol monobutyl ether, or monoacetates thereof, esters such as methyl a
- a solution containing the above reaction product as component (B) is obtained, and the solution is used as it is or after substitution with another solvent to form an antireflection film. It can be used as the component (B) of the composition.
- the mixing ratio of the component (A) and the component (B) depends on the characteristics to be obtained. Can be decided accordingly.
- the refractive index (n value) and extinction coefficient (k value) of the antireflection film can be easily controlled by appropriately changing the proportion of the component (A) in the composition for forming the antireflection film. .
- the mixing ratio (mass ratio) of the component (A) and the component (B) is preferably 99: 1 to 1:99, 90:10 to: LO: more preferable than 90 force, 60: 40 to 40: 60 more preferred.
- composition for forming an antireflection film of the present invention may contain an organic solvent, an activator, a crosslinking accelerator, an acid generator, and the like in addition to the component (A) and the component (B). .
- the composition for forming an antireflection film can contain the organic solvent used for the synthesis of the component (A) or the component (B) as it is. Further, in order to adjust to a preferable solid content concentration, a dilution solvent may be further added for dilution. As the diluting solvent, those mentioned as the organic solvent used for the preparation of the component (B) can be appropriately selected and used.
- the content of the organic solvent in the composition for forming an antireflection film is not particularly limited, and the substrate The concentration can be appropriately set according to the coating film thickness. Generally, it is prepared such that the solid content concentration of the composition for forming an antireflection film is in the range of 2 to 20% by mass, preferably 5 to 15% by mass.
- a mixed solvent of a monohydric alcohol and an alkyl carboxylic acid ester is more preferable for obtaining good embedding.
- the mixing ratio of monohydric alcohol and alkyl strength rubonic acid ester in the mixed solvent is preferably in the range of 20Z80 to 80Z20 by mass ratio.
- a mixed solvent of ⁇ -butanol and methyl 3-methoxypropionate is preferable.
- the composition for forming an antireflective film may contain an alcohol derived from the organic solvent used for the preparation of the siloxane polymer or an alcohol generated by a hydrolysis reaction of the silane compound.
- the amount of alcohol contained in the composition for forming an antireflection film Is preferably 15% by mass or less. If alcohol remains in the composition for forming an antireflection film in excess of 15% by mass, the Si group reacts with the alcohol to easily form RO-Si groups.
- the composition is gelled and the storage stability is inferior, and cracks are easily generated.
- the alcohol content is excessively mixed, it can be removed by distillation under reduced pressure, but vacuum distillation is performed at a vacuum degree of 39.9 ⁇ 10 2 to 39.9 ⁇ 10 3 Pa, preferably 66.5 ⁇ 10 2 to 26. 6 X 10 3 Pa, temperature 20-50 ° C, preferably 2-6 hours.
- composition for forming an antireflection film of the present invention is suitably used for forming an antireflection film provided as a lower layer of a resist layer.
- the composition for forming an antireflection film may be applied on a substrate and baked.
- the composition for forming an antireflection film containing the component (A) (which may contain the component (B) and other components) can be formed by the following method.
- the antireflection film-forming composition is applied onto the substrate by a coating method such as spin coating, cast coating, or roll coating so as to have a predetermined film thickness. What is necessary is just to set the film thickness of an antireflection film according to the magnitude
- the applied composition for forming an antireflection film is betad on a hot plate.
- the beta temperature is, for example, about 80 to 500 ° C, and more preferably about 80 to 350 ° C.
- the time required for this beta is 10 to 360 seconds, preferably 90 to 210 seconds. Beta treatment can be done in multiple stages, changing the beta temperature.
- the siloxane polymer having the structural units (a) and (b) above is used as the component (A)
- only the beta at a temperature of less than 300 ° C. can be used for reflection without mixing with the resist.
- a prevention film can be formed.
- composition for forming an antireflection film of the present invention can be suitably used as a via hole embedding material in a via forming method using a via-first dual damascene method. Film) can be formed.
- a base 10 having a via hole 11 formed in the uppermost layer is formed.
- a wiring layer 2, a barrier layer 3, and an interlayer insulating film 4 are sequentially formed on a substrate 1, and a via hole 11 penetrating the interlayer insulating film 4 which is the uppermost layer is formed.
- the via hole 11 can be formed by photolithography.
- the wiring layer 2 is formed of a metal material such as copper, aluminum, or an alloy thereof.
- the noria layer 3 has a function of preventing the material of the wiring layer 2 from diffusing and is made of, for example, silicon nitride.
- interlayer insulating film 4 for example, an SOG film mainly composed of SiO is used.
- the embedding material layer (antireflection film) 5 is formed on the substrate 10 by applying the antireflection film forming composition of the present invention so as to embed the via hole 11.
- a resist layer 6 ′ is formed on the burying material layer 5, and exposure, development, etc. are performed to pattern the resist layer 6 ′, thereby forming a resist pattern 6.
- the resist pattern 6 has a shape having an exposed region 6 a on at least the via hole 11.
- the exposed region 6a is a region that is not covered with the resist pattern 6 and the buried material layer 5 is exposed.
- the exposed region 6a preferably has a width equal to or larger than the diameter of the via hole 11.
- a trench pattern (wiring groove) 12 is formed by performing dry etching on at least a part 4a above the buried material layer 5 and the interlayer insulating film 4 in the exposed region 6a. That is, as shown in FIG. 4, a trench pattern (wiring groove) 12 connected to the via hole 11 is formed on the interlayer insulating film 4.
- the resist pattern 6 remaining on the interlayer insulating film 4 and the remaining burying material layer (antireflection film) 5 are removed by wet processing.
- a stripping solution having the ability of an aqueous alkaline solution containing amine can be suitably used.
- the barrier layer 3 exposed at the bottom of the via hole 11 is removed by a conventional method.
- the alkaline aqueous solution containing the amine those known as photoresist stripping solutions can be used.
- Amines include hydroxylamines, primary, secondary or tertiary aliphatic amines, alicyclic amines, aromatic amines, heterocyclic amines, aqueous ammonia, and lower alkyl quaternary ammonia. 4th sucking amine such as um salt. In particular, quaternary amines are preferably used.
- wiring is formed by embedding wiring material 7 such as copper in via hole 11 and trench pattern (wiring groove) 12.
- composition for forming an antireflection film of the present invention contains a light-absorbing compound group, it is possible to form a film exhibiting an antireflection function by absorbing exposure light to the resist layer.
- the antireflection film formed from the composition for forming an antireflection film of the present invention can increase the difference from the resist pattern (organic material) in the etching rate by dry etching. Further, it can be made closer to the etching rate of the interlayer insulating film usually formed of an inorganic material. This is because the main component is a siloxane polymer rich in properties as an inorganic compound. Therefore, the process of dry-etching the antireflection film and the interlayer insulating film using the resist pattern (organic material) as a mask can be efficiently performed, and this can contribute to the thin film of the resist.
- the antireflection film-forming composition of the present invention can be applied as an embedding material in a via-first dual damascene method, and can form an embedding material layer having an antireflection function. Therefore, the step of providing an antireflection layer between the resist layer and the burying material layer becomes unnecessary, which can contribute to a reduction in the number of steps in the wiring formation method. Especially when the component (A) contains a light-absorbing compound group having a hydrophilic group, 'Sexibility is good.
- the refractive index of the antireflection film (by adjusting the mixing ratio of the component (A) and the component (B) ( n value) and extinction coefficient (k value) can be adjusted easily. Therefore, by optimizing the refractive index (n value) and extinction coefficient (k value), it is possible to easily realize a very low reflection state.
- the form containing both the component (A) and the component (B) has an advantage that it dissolves very well in an alkaline aqueous solution (amine-based stripping solution) containing amine.
- an ashing treatment is required to remove the antireflection coating after patterning the substrate under the antireflection coating.
- the interlayer insulating film may be damaged.
- the antireflection film comprising the composition for forming an antireflection film containing both the component (A) and the component (B) can be easily removed with an amin-based stripping solution, the antireflection film This eliminates the need for an ashing treatment, and can prevent damage to the substrate (particularly the interlayer insulating film).
- a trench pattern is formed.
- damage to the lower layer (interlayer insulating film in the above example) of the burying material layer can be prevented by using an amine-based stripping solution.
- the solubility in an alkaline aqueous solution containing an amine is good.
- the embedding property is further improved, and even a via hole having a diameter of 80 nm, for example, can be embedded without a void.
- a via hole is buried in a via first dual damascene method, if a void is generated in the via hole, an etching process for forming a trench pattern is performed. This is not preferable because the etching rate is distorted.
- composition for forming an antireflection film containing both the component (A) and the component (B) If the film can be formed without performing the first step, there is an advantage.
- An antireflection film that does not mix with the resist layer can be formed only by baking without a strong curing process.
- the siloxane polymer having the structural units (a) and (b) described above is used as the component (A)
- only the beta at a temperature of less than 300 ° C. is used for reflection without mixing with the resist.
- it can form a prevention film.
- Tetramethoxysilane 136.6 g, methinotritrimethoxysilane 117.8 g, water 109 g, n-butanol 220.8 g and methyl-3-methoxypropionate (MMP) 220.8 g are mixed and the concentration is 60 mass. %
- Aqueous nitric acid 18.84 1 was added and stirred for 2 hours. Thereafter, the solution was allowed to stand at room temperature for 3 days for aging to obtain a solution containing the reaction product as the component (B).
- This reaction product includes a siloxane polymer having a siloxane bond represented by the following chemical formula (1).
- the obtained reaction product had a weight average molecular weight (Mw) of 1400.
- the resulting coating solution is spin-coated on the substrate, and an anti-reflective coating is applied by applying a three-stage beta treatment under heating conditions of 60 s at 80 ° C, then 60 s at 150 ° C, then 90 s at 260 ° C. Formed.
- the antireflection film was measured and analyzed with a spectroscopic ellipsometer. As a result, the n value was 1.58 and the k value was 0.46 for the ArF excimer laser.
- the thickness of the antireflection film is 900A or more.
- the reflectivity was reduced to about 2%.
- the top layer is made of SiO on the substrate and has a hole with a depth of 420nm and a diameter of 80nm.
- a substrate provided was prepared. On this substrate, the coating solution obtained in Example 1 was applied, and a beta treatment was performed under the same conditions as in Example 1 to form an embedding material layer.
- a coating solution was prepared in the same manner as in Example 1, except that component (A) was not included! /. This prepared coating solution was evaluated in the same manner as in Example 1 for antireflection ability, embedding property, resist pattern shape, and solubility.
- a film obtained in the same manner as in Example 1 using the coating solution of this comparative example had no light absorption function and did not have an antireflection function.
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Abstract
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/575,299 US20080318165A1 (en) | 2004-09-16 | 2005-08-31 | Composition For Forming Antireflective Film And Wiring Forming Method Using Same |
| CN2005800296620A CN101010635B (zh) | 2004-09-16 | 2005-08-31 | 防反射膜形成用组合物及使用其的配线形成方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-269705 | 2004-09-16 | ||
| JP2004269705A JP4541080B2 (ja) | 2004-09-16 | 2004-09-16 | 反射防止膜形成用組成物およびこれを用いた配線形成方法 |
Publications (1)
| Publication Number | Publication Date |
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| WO2006030641A1 true WO2006030641A1 (ja) | 2006-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/015907 Ceased WO2006030641A1 (ja) | 2004-09-16 | 2005-08-31 | 反射防止膜形成用組成物およびこれを用いた配線形成方法 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20080318165A1 (ja) |
| JP (1) | JP4541080B2 (ja) |
| KR (1) | KR20070040827A (ja) |
| CN (1) | CN101010635B (ja) |
| TW (1) | TWI279647B (ja) |
| WO (1) | WO2006030641A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007105538A1 (ja) * | 2006-03-10 | 2007-09-20 | Tokyo Ohka Kogyo Co., Ltd. | レジスト下層膜用組成物及びこれを用いたレジスト下層膜 |
| US8178284B2 (en) | 2006-09-29 | 2012-05-15 | Tokyo Ohka Kogyo Co., Ltd. | Method of forming pattern |
| JP2014209264A (ja) * | 2014-07-10 | 2014-11-06 | Jsr株式会社 | ダマシンプロセス用絶縁パターン形成材料 |
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| JP2007279135A (ja) * | 2006-04-03 | 2007-10-25 | Tokyo Ohka Kogyo Co Ltd | レジスト下層膜用組成物及びこれを用いたレジスト下層膜 |
| MY153136A (en) * | 2006-08-14 | 2014-12-31 | Dow Corning | Method of preparing a patterned film with a developing solvent |
| JP4987411B2 (ja) * | 2006-09-29 | 2012-07-25 | 東京応化工業株式会社 | パターン形成方法 |
| JP2008266576A (ja) * | 2007-03-29 | 2008-11-06 | Air Water Inc | ポリシロキサン化合物、その製造方法、及びその用途 |
| JP4963254B2 (ja) * | 2007-03-30 | 2012-06-27 | 東京応化工業株式会社 | ナノインプリント用の膜形成組成物、並びに構造体の製造方法及び構造体 |
| KR100901759B1 (ko) * | 2007-09-12 | 2009-06-11 | 제일모직주식회사 | 레지스트 하층막용 하드마스크 조성물, 이를 이용한반도체 집적회로 디바이스의 제조방법 및 반도체 집적회로디바이스 |
| US8084862B2 (en) * | 2007-09-20 | 2011-12-27 | International Business Machines Corporation | Interconnect structures with patternable low-k dielectrics and method of fabricating same |
| US8618663B2 (en) | 2007-09-20 | 2013-12-31 | International Business Machines Corporation | Patternable dielectric film structure with improved lithography and method of fabricating same |
| CN101303525B (zh) * | 2008-06-23 | 2012-12-05 | 上海集成电路研发中心有限公司 | 一种双重图形曝光工艺 |
| TWI416262B (zh) * | 2009-03-13 | 2013-11-21 | Jsr Corp | A silicon film-forming composition, a silicon-containing film, and a pattern-forming method |
| JP5038354B2 (ja) * | 2009-05-11 | 2012-10-03 | 信越化学工業株式会社 | ケイ素含有反射防止膜形成用組成物、ケイ素含有反射防止膜形成基板及びパターン形成方法 |
| US9046785B2 (en) * | 2009-12-30 | 2015-06-02 | Taiwan Semiconductor Manufacturing Company, Ltd. | Method and apparatus of patterning a semiconductor device |
| US8703625B2 (en) * | 2010-02-04 | 2014-04-22 | Air Products And Chemicals, Inc. | Methods to prepare silicon-containing films |
| CN102881642B (zh) * | 2012-09-20 | 2018-04-06 | 上海集成电路研发中心有限公司 | 重新布线图形的形成方法 |
| JP6252623B2 (ja) * | 2016-05-20 | 2017-12-27 | 大日本印刷株式会社 | フォトマスクブランクス |
| JP7075209B2 (ja) * | 2016-12-28 | 2022-05-25 | 東京応化工業株式会社 | パターン形成方法及びポリシラン樹脂前駆体の製造方法 |
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| US6420088B1 (en) * | 2000-06-23 | 2002-07-16 | International Business Machines Corporation | Antireflective silicon-containing compositions as hardmask layer |
| TW576859B (en) * | 2001-05-11 | 2004-02-21 | Shipley Co Llc | Antireflective coating compositions |
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| JP4491283B2 (ja) * | 2004-06-10 | 2010-06-30 | 信越化学工業株式会社 | 反射防止膜形成用組成物を用いたパターン形成方法 |
-
2004
- 2004-09-16 JP JP2004269705A patent/JP4541080B2/ja not_active Expired - Fee Related
-
2005
- 2005-08-31 WO PCT/JP2005/015907 patent/WO2006030641A1/ja not_active Ceased
- 2005-08-31 US US11/575,299 patent/US20080318165A1/en not_active Abandoned
- 2005-08-31 CN CN2005800296620A patent/CN101010635B/zh not_active Expired - Fee Related
- 2005-08-31 KR KR1020077005137A patent/KR20070040827A/ko not_active Ceased
- 2005-09-08 TW TW094130960A patent/TWI279647B/zh not_active IP Right Cessation
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| JPH06138664A (ja) * | 1992-10-26 | 1994-05-20 | Mitsubishi Electric Corp | パターン形成方法 |
| JP2001343752A (ja) * | 2000-03-30 | 2001-12-14 | Tokyo Ohka Kogyo Co Ltd | 反射防止膜形成用組成物 |
| WO2003044077A1 (en) * | 2001-11-16 | 2003-05-30 | Honeywell International Inc. | Spin-on-glass anti-reflective coatings for photolithography |
| WO2003089992A1 (en) * | 2002-04-16 | 2003-10-30 | International Business Machines Corporation | Antireflective sio-containing compositions for hardmask layer |
| JP2004145262A (ja) * | 2002-06-28 | 2004-05-20 | Fujitsu Ltd | 半導体装置の製造方法及びパターンの形成方法 |
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| WO2007105538A1 (ja) * | 2006-03-10 | 2007-09-20 | Tokyo Ohka Kogyo Co., Ltd. | レジスト下層膜用組成物及びこれを用いたレジスト下層膜 |
| US8178284B2 (en) | 2006-09-29 | 2012-05-15 | Tokyo Ohka Kogyo Co., Ltd. | Method of forming pattern |
| JP2014209264A (ja) * | 2014-07-10 | 2014-11-06 | Jsr株式会社 | ダマシンプロセス用絶縁パターン形成材料 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006084799A (ja) | 2006-03-30 |
| JP4541080B2 (ja) | 2010-09-08 |
| TW200617604A (en) | 2006-06-01 |
| KR20070040827A (ko) | 2007-04-17 |
| CN101010635A (zh) | 2007-08-01 |
| US20080318165A1 (en) | 2008-12-25 |
| CN101010635B (zh) | 2010-06-16 |
| TWI279647B (en) | 2007-04-21 |
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