WO2012090965A1 - アルカリ現像用感光性フェノール樹脂組成物、硬化レリーフパターン及び半導体の製造方法、並びにビフェニルジイルトリヒドロキシベンゼン樹脂 - Google Patents
アルカリ現像用感光性フェノール樹脂組成物、硬化レリーフパターン及び半導体の製造方法、並びにビフェニルジイルトリヒドロキシベンゼン樹脂 Download PDFInfo
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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
- G03F7/022—Quinonediazides
- G03F7/023—Macromolecular quinonediazides; Macromolecular additives, e.g. binders
- G03F7/0233—Macromolecular quinonediazides; Macromolecular additives, e.g. binders characterised by the polymeric binders or the macromolecular additives other than the macromolecular quinonediazides
- G03F7/0236—Condensation products of carbonyl compounds and phenolic compounds, e.g. novolak resins
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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
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- 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
- C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G61/02—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes
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- 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
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
- C08L61/12—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols with polyhydric phenols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L65/00—Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Compositions of derivatives of such polymers
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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
- G03F7/0048—Photosensitive materials characterised by the solvents or agents facilitating spreading, e.g. tensio-active agents
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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
- G03F7/039—Macromolecular compounds which are photodegradable, e.g. positive electron resists
- G03F7/0392—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition
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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
- G03F7/20—Exposure; Apparatus therefor
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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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—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
- H01L21/0274—Photolithographic processes
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- 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
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/30—Monomer units or repeat units incorporating structural elements in the main chain
- C08G2261/34—Monomer units or repeat units incorporating structural elements in the main chain incorporating partially-aromatic structural elements in the main chain
- C08G2261/342—Monomer units or repeat units incorporating structural elements in the main chain incorporating partially-aromatic structural elements in the main chain containing only carbon atoms
- C08G2261/3424—Monomer units or repeat units incorporating structural elements in the main chain incorporating partially-aromatic structural elements in the main chain containing only carbon atoms non-conjugated, e.g. paracyclophanes or xylenes
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- 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
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/40—Polymerisation processes
- C08G2261/45—Friedel-Crafts-type
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- 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
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/50—Physical properties
- C08G2261/59—Stability
- C08G2261/592—Stability against heat
Definitions
- a first aspect of the present invention is a photosensitive phenol resin composition for alkali development useful for forming a surface protective film or an interlayer insulating film in a semiconductor device, and a high heat-resistant cured relief pattern using the composition And a semiconductor device having the cured relief pattern.
- the second aspect of the present invention relates to a biphenyldiyltrihydroxybenzene resin, a method for producing the same, and use of the resin.
- a polyimide resin or a polybenzoxazole resin having excellent heat resistance, electrical characteristics, mechanical characteristics, and the like has been widely used for the surface protective film and interlayer insulating film of semiconductor devices. Since these resins have low solubility in various solvents, they are generally used as a composition dissolved in a solvent in the form of a precursor. Therefore, a step for ring-closing the precursor is required at the time of use. This ring-closing process is usually performed by thermosetting which is heated to 300 ° C. or higher.
- thermosetting temperature has been required for the material for forming the surface protective film or the interlayer insulating film.
- thermosetting properties are required.
- Patent Documents 1 and 2 As a resin that does not require ring closure, a phenol resin such as novolak having excellent cost and photosensitive performance is used, and a material having improved heat resistance and the like by adding a crosslinking agent or another type of polymer thereto. It has been proposed (Patent Documents 1 and 2). However, even when these materials are applied to a semiconductor device as a surface protective film or an interlayer insulating film, a relief pattern as designed at the time of curing cannot be obtained due to a low softening point, and further, the degree of elongation of the obtained cured film is high. Since it is low, the reliability of the semiconductor device is low, and it has been difficult to use a substitute material for polyimide resin and polybenzoxazole resin.
- Patent Document 3 proposes a phenol resin having a skeleton of a condensate of a biphenyl compound and phenols, and a heat-resistant epoxy resin cured product using the condensate as a curing agent for an epoxy resin is also disclosed. Proposed.
- the problem to be solved by the present invention is that a highly reliable semiconductor device can be produced when applied to a semiconductor device, and a photosensitive phenol resin composition for alkali development. And a method for producing a cured relief pattern using the composition, and a semiconductor device having the cured relief pattern.
- the problem to be solved by the present invention is a resin having sufficient lithography properties (alkali solubility) and excellent heat resistance when applied to a semiconductor device, A manufacturing method, a composition using the resin, a manufacturing method of a semiconductor device using the composition, and a semiconductor device are provided.
- the present inventor In order for the present inventor to be a material capable of forming a highly reliable cured film when applied to a semiconductor device, the softening point in the alkali-soluble phenol resin and the arrangement of phenolic hydroxyl groups are important.
- the present inventors have found the first aspect of the present invention.
- the first aspect of the present invention is as follows.
- each A is independently a divalent organic group having 6 to 25 carbon atoms having a phenolic hydroxyl group, and the bond of A is present in the aromatic ring having a phenolic hydroxyl group;
- the ring may have a substituent other than a hydroxyl group;
- B i is a C 1-15 divalent organic group having no phenolic hydroxyl group;
- i is an integer of 1 to n Yes; and
- n is an integer from 2 to 1,000.
- ⁇ obtained by calculating the shortest distance d i between oxygen atoms in two phenolic hydroxyl groups in A facing each other across B i by a molecular mechanics method.
- the average value of i ( ⁇ d i / n) is not less 9 angstroms ( ⁇ ) or more, and an alkali-soluble phenol resin having a softening point, characterized in that at 100 ° C. or higher;
- the average value of the d i ( ⁇ d i / n) is 10 angstroms ( ⁇ ) or more, [1] or an alkali developing photosensitive phenolic resin composition according to [2].
- the Bi is represented by the following general formula (2): -XLLY-MZ- (2) ⁇ Wherein L and M are divalent aromatic groups having 6 to 10 carbon atoms which do not have a phenolic hydroxyl group and may have a substituent other than the phenolic hydroxyl group, and X, Y and Z are divalent groups selected from the group consisting of a single bond, an aliphatic chain having 1 to 2 carbon atoms, an amide group, a carbonyl group, an ester group, a urea group, a urethane group, an ether group and a thioether group. . ⁇ The photosensitive phenol resin composition for alkali development according to any one of [1] to [3], represented by:
- a step of applying the photosensitive phenol resin composition for alkali development according to any one of [1] to [6] to a substrate, a step of exposing the photosensitive phenol resin composition for alkali development, exposure A method for producing a cured relief pattern, comprising the steps of: developing the alkali phenolic photosensitive phenolic resin composition to form a relief pattern; and heating the relief pattern to form a cured relief pattern.
- the present inventors have intensively studied to solve the problem in the second aspect of the present invention, and as a result of repeated experiments, as a result of using a resin having both a biphenyldiyl structure and a trihydroxybenzene structure. The inventors have found that the problem can be solved, and have completed the second aspect of the present invention.
- the second aspect of the present invention is as follows: [1] The following general formula (1): ⁇ Wherein R 1 represents the following general formula (2): (Wherein R 3 is a methyl group or an ethyl group, and p and q are each independently an integer of 0 to 4), and R 2 is And a group selected from hydrogen, a methyl group, and an ethyl group, and n is an integer of 2 to 150. ⁇ The biphenyl diyl trihydroxybenzene resin represented by this.
- the general formula (1) is represented by the following general formula (3): ⁇ Wherein, R 1 and n are the same as those defined in the general formula (1). ⁇ Or the following general formula (4): ⁇ Wherein, R 1 and n are the same as those defined in the general formula (1). ⁇ The biphenyldiyltrihydroxybenzene resin as described in [1] above.
- the general formula (2) is the following formula (5):
- the thermosetting temperature for forming the surface protective film or interlayer insulating film of the semiconductor device can be set to a relatively low temperature (for example, 250 ° C. or lower).
- curing the photosensitive phenol resin composition for alkali image development can be improved.
- the semiconductor device is not only reduced in cracks in the surface protective film or the interlayer insulating film when stress due to heat is applied, but also increases its reliability, The reliability of the semiconductor device including the same can also be improved.
- a biphenyldiyltrihydroxybenzene resin that simultaneously satisfies lithography performance and resin heat resistance that could not be realized with a conventional phenolic resin, and also has performance that can be applied to a semiconductor device, and its production method
- a composition using the resin, a method for manufacturing a semiconductor device using the composition, and a semiconductor device can be obtained.
- FIG. 3 is a 1 H-NMR measurement result of the resin (P-11) synthesized in Example 1 in the second embodiment of the present invention.
- FIG. 3 is a measurement result of IR spectrum of the resin (P-11) synthesized in Example 1 in the second embodiment of the present invention.
- FIG. FIG. 3 is a 1 H-NMR measurement result of the resin (P-12) synthesized in Example 2 in the second embodiment of the present invention.
- FIG. In the second aspect of the present invention it is an IR spectrum measurement result of the resin (P-12) synthesized in Example 2.
- first composition a specific alkali-soluble phenol resin in the first embodiment of the present invention; a photosensitive agent; and a photosensitive phenol resin composition for alkali development (hereinafter, simply referred to as “first composition”) containing a solvent. explain.
- the alkali-soluble phenol resin used in the composition according to the first aspect of the present invention is a polymer compound containing a compound having a phenolic hydroxyl group in its repeating unit.
- the alkali-soluble phenol resin has the following general formula (1): -AB 1 -AB 2 -AB 3 -A -... B i ... AB n -A- (1) ⁇
- each A is independently a divalent organic group having 6 to 25 carbon atoms having a phenolic hydroxyl group, and the bond of A is present in the aromatic ring having a phenolic hydroxyl group;
- the ring may have a substituent other than a hydroxyl group;
- B i is a C 1-15 divalent organic group having no phenolic hydroxyl group; i is an integer of 1 to n Yes; and n is an integer from 2 to 1,000.
- ⁇ And has a softening point of 100 ° C. or higher.
- n is an integer of 2 to 1,000, preferably an integer of 5 to 800.
- the alkali-soluble phenol resin used in the first aspect of the present invention is Bi.
- the closest distance between the oxygen atom of the phenolic hydroxyl group of one A and the oxygen atom of the phenolic hydroxyl group of the other A hereinafter also referred to as the interhydroxyl distance or the shortest distance di
- the alkali-soluble phenol resin used in the first aspect of the present invention calculate the shortest distances d i between the oxygen atom of the phenolic in hydroxyl groups in the two A facing across the B i
- the average value ( ⁇ d i / n) of d i obtained by the above is 9 angstroms ( ⁇ ) or more.
- two A facing across the B i is in the case where each having one or more phenolic hydroxyl group, the oxygen atom of the phenolic hydroxyl group of one of the A, oxygen phenolic hydroxyl groups of the other A
- the shortest distance d i between the atoms is calculated by a molecular mechanics method, and the average value ( ⁇ d i / n) of the shortest distance d i is 9 ⁇ or more.
- the distance between hydroxyl groups in the alkali-soluble phenol resin can be obtained by calculating a three-dimensional structural formula by MM2 method of molecular mechanics calculation (molecular mechanics method) with SymApps (registered trademark) manufactured by Bio-Rad Laboratories.
- the distance between hydroxyl groups needs to be 9 angstroms or more, preferably 10 angstroms or more, and more preferably 11 angstroms or more.
- the upper limit of this distance is preferably 20 angstroms or less from the viewpoint of elongation and alkali solubility.
- the average value ( ⁇ d i / n) of the shortest distance d i is 9 angstroms ( ⁇ ) or more, preferably 10 angstroms or more, more preferably 11 angstroms or more, and the average value of the shortest distances d i ( The upper limit value of ⁇ d i / n) is also preferably 20 angstroms or less.
- B i is one kind of divalent organic groups, respectively, the shortest distance d i in A-B i -A it is equal to the mean value of the shortest distance d i ( ⁇ d i / n) itself.
- the alkali-soluble phenol resin, a divalent or an organic group, and / or copolymers with multiple types of divalent organic groups as B i of the plurality of types as A is The distance to a possible bond is obtained in the same manner as described above, and the weighted average is calculated from the actual existence ratio. For example, consider the case of an alkali-soluble phenol resin using two types of compounds as B i (each referred to as B i ′ and B i ′′).
- hydroxyl distance is 5 angstroms
- A-B i' A-B i in '-A when the hydroxyl distance is 10 ⁇
- the resulting alkali-soluble phenolic resin When analyzed by NMR or the like and the ratio of B i ′ to B i ′′ contained in the resin is 8/2, the distance between hydroxyl groups of the alkali-soluble phenol resin is 6 ⁇ .
- 2 or more types of alkali-soluble phenol resins it can be similarly determined from the mixing ratio of these resins.
- the alkali-soluble phenol resin in the first aspect of the present invention has a softening point of 100 ° C. or higher.
- the softening point of the alkali-soluble phenol resin is less than 100 ° C., the shape of the formed relief pattern collapses End up.
- the softening point can be measured by the ring and ball method according to JIS K5601-2-2.
- the softening point is preferably 120 ° C. or higher, and more preferably 140 ° C. or higher. The higher the softening point, the better, but the upper limit is preferably 300 ° C. from the viewpoint of solubility in a solvent or an alkali developer.
- Alkali-soluble phenolic resin the above general formula (1) compound providing part A in, for example, for the compound having a phenolic hydroxyl group
- compound providing B i of the general formula (1) for example, phenolic It can be obtained by polymerizing an aldehyde compound, a methylol compound, an alkoxymethyl compound, or a diene compound having no hydroxyl group.
- the aldehyde compound, methylol compound, alkoxymethyl compound, or diene compound which has a phenolic hydroxyl group can also be used for superposition
- Bi part the part connecting the aromatic ring having a phenolic hydroxyl group of the compound and the adjacent A part
- a part the other part
- Specific examples thereof include 2,6-bis (hydroxymethyl) -p-cresol, 4,6-bis (hydroxymethyl) -o-cresol, 2,4-bis (hydroxymethyl) -m-cresol, 2,6 -Bis (methoxymethyl) -p-cresol, 2,6-bis (p-hydroxymethylbenzyl) -p-cresol, and the like.
- Examples of the compound having a phenolic hydroxyl group used include phenol, cresol, ethylphenol, propylphenol, butylphenol, amylphenol, benzylphenol, adamantanephenol, benzyloxyphenol, xylenol, catechol, resorcinol, ethylresorcinol, hexylresorcinol, Hydroquinone, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, caffeic acid, 3,4-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, methyl 2,3-dihydroxybenzoate, 2,4 -Methyl dihydroxybenzoate, methyl 2,6-dihydroxybenzoate, methyl 3,4-dihydroxybenzoate, methyl 3,5-dihydroxybenzoate, 3,4-dihydroxybenzoate Acid ethyl,
- Gallic acid methyl gallate, ethyl gallate, propyl gallate, 2 ′, 3 ′, 4′-trihydroxyacetophenone, 2 ′, 4 ′, 5′-trihydroxyacetophenone, 2 ′, 4 ′, 6′- Trihydroxyacetophenone, 3 ′, 4 ′, 5′-trihydroxyacetophenone, 2,3,4-trihydroxybenzophenone, 2,4,5-trihydroxybenzophenone, 2,4,6-trihydroxybenzophenone, 3,4 , 5-trihydroxybenzophenone, 2,3,4-trihydroxybenzaldehyde, 2,4,5-trihydroxybenzaldehyde, 2,4,6-trihydroxybenzaldehyde, 3,4,5-trihydroxybenzaldehyde, 2,3 , 4-Trihydroxybenzoic acid, 2,4,5-trihydroxybenzoic acid 2,4,6-trihydroxybenzoic acid, 3,4,5-trihydroxybenzoic acid, pararozolic acid, biphenol, bisphenol A, bisphenol AF, bisphenol B, bisphenol
- the compound giving the A part in the general formula (1) is preferably a compound having 2 to 3 phenolic hydroxyl groups among the above compounds.
- preferred compounds include catechol, resorcinol, hydroquinone, 2,3-dihydroxybenzoic acid, methyl 2,3-dihydroxybenzoate.
- aldehyde compounds include formaldehyde, acetaldehyde, propionaldehyde, pivalaldehyde, butyraldehyde, pentanal, hexanal, trioxane, glyoxal, cyclohexylaldehyde, diphenylacetaldehyde, ethylbutyraldehyde, benzaldehyde, cinnamaldehyde, diphenylacetaldehyde, methyl fumarate aldehyde, Examples include 3-methyl-2-butenal, glyoxylic acid, 5-norbornene-2-carboxaldehyde, malondialdehyde, succindialdehyde, glutaraldehyde, naphthaldehyde, terephthalaldehyde, and the like.
- methylol compounds include 1,3-bis (hydroxymethyl) urea, ribitol, arabitol, allitol, 2,2-bis (hydroxymethyl) butyric acid, 1,3-propanediol, 2-benzyloxy-1,3-propane Diol, 2,2-dimethyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, monoacetin, 2-methyl-2-nitro-1,3-propanediol, 5-norbornene-2 , 2-dimethanol, 5-norbornene-2,3-dimethanol, pentaerythritol, 2-phenyl-1,3-propanediol, trimethylolethane, trimethylolpropane, 3,6-bis (hydroxymethyl) durene, 2-nitro-p-xylylene glycol, 1,10-dihydroxydecane, 1, 2-dihydroxydodecane, 1,4-bis (hydroxymethyl) duren
- alkoxymethyl compounds include 1,3-dimethoxypropane, 1,3-bis (methoxymethyl) urea, 2,2-bis (methoxymethyl) butyric acid, 2,2-bis (methoxymethyl) -5-norbornene, 2 , 3-bis (methoxymethyl) -5-norbornene, 1,4-bis (methoxymethyl) cyclohexane, 1,4-bis (methoxymethyl) cyclohexene, 1,6-bis (methoxymethyl) adamantane, 1,4- Bis (methoxymethyl) benzene, 1,3-bis (methoxymethyl) benzene, 2,6-bis (methoxymethyl) -p-cresol, 2,6-bis (methoxymethyl) -1,4-dimethoxybenzene, 2 , 3-bis (methoxymethyl) naphthalene, 2,6-bis (methoxymethyl) naphthalene, 1,8-bis (methoxymethyl) )
- Diene compounds include butadiene, pentadiene, hexadiene, heptadiene, octadiene, decadiene, 3-methyl-1,3-butadiene, 1,3-butanediol-dimethacrylate, 2,4-hexadiene-1-ol, methylcyclo Hexadiene, cyclopentadiene, cyclohexadiene, cyclohexadiene, cyclooctadiene, dicyclopentadiene, 1-hydroxydicyclopentadiene, 1-methylcyclopentadiene, methyldicyclopentadiene, diallyl ether, diallyl sulfide, diallyl adipate, 2,5 -Norbornadiene, tetrahydroindene, 5-ethylidene-2-norbornene, 5-vinyl-2-norbornene, diallyl oxalate, diallyl gluta
- the aforementioned Bi part is represented by the following general formula (2): -XLLY-MZ- (2) ⁇
- L and M are each independently a divalent aromatic group having 6 to 10 carbon atoms which does not have a phenolic hydroxyl group and may have a substituent other than the phenolic hydroxyl group.
- X, Y and Z are each independently selected from the group consisting of a single bond, an aliphatic group having 1 to 2 carbon atoms, an amide group, a carbonyl group, an ester group, a urea group, a urethane group, an ether group and a thioether group. It is a divalent group selected. ⁇ The structure represented by these is preferable.
- the alkali-soluble phenol resin according to the first aspect of the present invention is obtained by cleaving a methylol compound, an alkoxymethyl compound, or a diene compound with respect to the above-described compound having a phenolic hydroxyl group, respectively, by dehydration, dealcoholization, or cleavage of an unsaturated bond.
- an acid or alkaline catalyst may be used during the polymerization.
- Acidic catalysts include hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, phosphorous acid, methanesulfonic acid, p-toluenesulfonic acid, dimethyl sulfuric acid, diethyl sulfuric acid, acetic acid, oxalic acid, 1-hydroxyethylidene-1,1'-diphosphone Examples thereof include acid, zinc acetate, boron trifluoride, boron trifluoride / phenol complex, boron trifluoride / ether complex, and the like.
- alkaline catalysts include lithium hydroxide, sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, sodium carbonate, triethylamine, pyridine, 4-N, N-dimethylaminopyridine, piperidine, piperazine, 1 , 4-diazabicyclo [2.2.2] octane, 1,8-diazabicyclo [5.4.0] -7-undecene, 1,5-diazabicyclo [4.3.0] -5-nonene, ammonia, hexa And methylenetetramine.
- the weight average molecular weight of the alkali-soluble phenol resin in the first aspect of the present invention is preferably 1,500 or more, more preferably 3,000 or more, and most preferably 4,000 or more.
- the measurement of the weight average molecular weight is performed by gel permeation chromatography (GPC), and is calculated by a calibration curve created using standard polystyrene.
- the first composition contains a photosensitizer as an essential component.
- the first composition can be made positive or negative.
- a photoacid generator As the photoacid generator, a naphthoquinonediazide (NQD) compound, an onium salt, a halogen-containing compound, and the like can be used, and the NQD compound described below is preferable from the viewpoint of solvent solubility and storage stability.
- onium salt examples include iodonium salts, sulfonium salts, phosphonium salts, ammonium salts, diazonium salts, and the like, and onium salts selected from the group consisting of diaryliodonium salts, triarylsulfonium salts, and trialkylsulfonium salts are preferable.
- halogen-containing compound examples include haloalkyl group-containing hydrocarbon compounds, and trichloromethyltriazine is preferable.
- naphthoquinone diazide compound examples include compounds having a 1,2-benzoquinone diazide structure or a 1,2-naphthoquinone diazide structure. These compounds include, for example, US Pat. No. 2,772,972, US Pat. No. 2,797. No. 213, U.S. Pat. No. 3,669,658, and the like.
- the naphthoquinonediazide structure includes 1,2-naphthoquinonediazide-4-sulfonic acid ester of a polyhydroxy compound having a specific structure described in detail below, and 1,2-naphthoquinonediazide-5-sulfonic acid ester of the polyhydroxy compound. At least one compound selected from the group consisting of (hereinafter also referred to as “NQD compound”).
- the NQD compound is obtained by subjecting the naphthoquinone diazide sulfonic acid compound to sulfonyl chloride with chlorosulfonic acid or thionyl chloride according to a conventional method, and subjecting the resulting naphthoquinone diazide sulfonyl chloride to a polyhydroxy compound.
- the NQD compound can be obtained by reacting in the presence of a basic catalyst for esterification, and washing the resulting product with water and drying.
- NQD compounds examples include the following. ⁇ Wherein Q is a hydrogen atom or the following: Of naphthoquinonediazide sulfonate groups, and all Qs are not simultaneously hydrogen atoms. ⁇
- a naphthoquinone diazide sulfonyl ester compound in which a 4-naphthoquinone diazide sulfonyl group and a 5-naphthoquinone diazide sulfonyl group are used in the same molecule can be used, or a 4-naphthoquinone diazide sulfonyl ester compound and a 5-naphthoquinone diazide sulfonyl ester compound. Can also be used as a mixture.
- the blending amount of the photosensitizer with respect to 100 parts by mass of the alkali-soluble phenol resin is preferably 1 to 50 parts by mass, and more preferably 5 to 30 parts by mass.
- the blending amount of the photosensitizer is 1 part by mass or more, the patterning property of the resin is good, and when it is 50 parts by mass or less, the tensile elongation rate of the cured film is good and the exposed portion is developed. There is little residue (scum).
- Examples of the photobase generator include oxime type, carbamate compounds, quaternary ammonium salts, amine imide compounds and the like, and carbamate compounds are preferable.
- solvent used for the first composition examples include amides, sulfoxides, ureas, ketones, esters, lactones, ethers, halogenated hydrocarbons, hydrocarbons, and the like.
- N-methyl-2-pyrrolidone dimethyl sulfoxide, tetramethylurea, butyl acetate, ethyl lactate, ⁇ -butyrolactone
- Propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, benzyl alcohol, phenyl glycol, and tetrahydrofurfuryl alcohol are preferred.
- the addition amount of the solvent is 100 to 1000 parts by weight, preferably 120 to 700 parts by weight, more preferably 100 parts by weight of the alkali-soluble phenol resin. Is in the range of 150 to 500 parts by weight.
- the photosensitive phenol resin composition for alkali development in the first aspect of the present invention preferably further contains a crosslinking agent.
- the crosslinking agent used in the first embodiment of the present invention the following 1) to 10): 1) Epoxy compounds such as 1,1,2,2-tetra (p-hydroxyphenyl) ethanetetraglycidyl ether, glycerol triglycidyl ether, ortho-secondary butylphenyl glycidyl ether, 1,6-bis (2,3-epoxy Propoxy) naphthalene, diglycerol polyglycidyl ether, polyethylene glycol glycidyl ether, triglycidyl isocyanurate, epiclone 830, 850, 1050, N-680, N-690, N-695, N-770, HP-7200, HP-820 , EXA-4850-1000 (trade name, manufactured by DIC Corporation), Denacol EX-201, EX-313, EX-314, EX-321, EX-411, EX-511, EX-512, EX-612, EX- 614,
- Oxetane compounds such as xylylene bisoxetane, 3-ethyl-3 ⁇ [(3-ethyloxetane-yl) methoxy] methyl ⁇ oxetane,
- Oxazoline compounds such as 2,2′-bis (2-oxazoline), 2,2′-isopropylidenebis (4-phenyl-2-oxazoline), 1,3-bis (4,5-dihydro-2) -Oxazolyl) benzene, 1,4-bis (4,5-dihydro-2-oxazolyl) benzene, Epocross K-2010E, K-2020E, K-2030E, WS-500, WS-700, RPS-1005 (trade names) , Manufactured by Nippon Shokubai)
- Carbodiimide compounds such as carbodilite SV-02, V-01, V-02, V-03, V-04, V-05, V-07, V-09, E-01, E-02, LA- 1 (trade name, manufactured by Nisshinbo Chemical Co., Ltd.),
- Aldehydes and modified aldehydes such as aldehyde, formaldehyde, paraformaldehyde, glutaraldehyde, hexamethylenetetramine, trioxane, glyoxal, malondialdehyde, succinaldehyde,
- Isocyanate compounds such as 4,4′-diphenylmethane diisocyanate, tolylene diisocyanate, 1,3-phenylene bismethylene diisocyanate, dicyclohexylmethane-4,4′-diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, takenate 500, 600 Cosmonate NBDI, ND (trade name, manufactured by Mitsui Chemicals) Duranate 17B-60PX, TPA-B80E, MF-B60X, MF-K60X, E402-B80T (trade name, manufactured by Asahi Kasei Chemical)
- Metal chelating agents such as acetylacetone aluminum (III) salt, acetylacetone titanium (IV) salt, acetylacetone chromium (III) salt, acetylacetone magnesium (II) salt, acetylacetone nickel (II) salt, trifluoroacetylacetone aluminum (III) Salts, trifluoroacetylacetone titanium (IV) salt, trifluoroacetylacetone chromium (III) salt, trifluoroacetylacetone magnesium (II) salt, trifluoroacetylacetone nickel (II) salt,
- N-methylol compounds such as Nicarak MW-30MH, MW-100LH, BL-60, MX-270, MX-280, MX-290 (trade name, manufactured by Sanwa Chemical Co., Ltd.), Cymel 300, 303, 1123 My coat 102, 105 (trade name, manufactured by Nippon Cytec Co., Ltd.)
- C-methylol compounds such as 1,4-bis (methoxymethyl) benzene, 4,4'-bis (methoxymethyl) biphenyl,
- Unsaturated bond-containing compounds such as vinyl acetate, trimethylolpropane trimethacrylate, triallyl 1,3,5-benzenetricarboxylic acid, triallyl trimellitic acid, pyromellitic acid tetraallyl ester, pentaerythritol pentaacrylate, dipentaerythritol Pentaacrylate, trimethylolpropane triacrylate, ditrimethylolpropane tetraacrylate, NK ester 1G, 2G, 3G, 4G, 9G, 14G, NPG, BPE-100, BPE-200, BPE-500, BPE-1400, A-200 A-400, A-600, TMPT, A-TMM-3 (trade name, manufactured by Shin-Nakamura Chemical Co., Ltd.), BANI-M, BANI-X (trade name, manufactured by Maruzen Petrochemical Co., Ltd.) The crosslinking agent represented by these is mentioned.
- Epicron 830, 850, 1050, N-680, N-690, N-695, N-770, HP-7200 from the viewpoint of elongation and heat resistance of the obtained thermosetting film HP-820, EXA-4850-1000, Denacol EX-201, EX-313, EX-314, EX-321, EX-411, EX-511, EX-512, EX-612, EX-614, EX-614B , EX-731, EX-810, EX-911, EM-150, xylylene bisoxetane, 3-ethyl-3 ⁇ [(3-ethyloxetane-yl) methoxy] methyl ⁇ oxetane, 1,3-bis (4 , 5-dihydro-2-oxazolyl) benzene, Nicarak MW-30MH, MW-100LH, BL-60, MX-270, MX-280,
- the amount of the crosslinking agent is preferably 0.1 to 30 parts by mass with respect to 100 parts by mass of the alkali-soluble phenol resin.
- the first composition of the present invention can contain a dye, a surfactant, an adhesion aid for enhancing adhesion to the substrate, a dissolution accelerator, a crosslinking accelerator, and the like. is there.
- the dye examples include methyl violet, crystal violet, and malachite green.
- the blending amount of the dye is preferably 0.1 to 30 parts by mass with respect to 100 parts by mass of the alkali-soluble phenol resin.
- surfactant examples include non-ionic surfactants composed of polyglycols such as polypropylene glycol and polyoxyethylene lauryl ether or derivatives thereof, and Fluorard (registered trademark, trade name, manufactured by Sumitomo 3M), for example.
- Fluorosurfactants such as Megafac (registered trademark, trade name, manufactured by Dainippon Ink and Chemicals), Lumiflon (registered trademark, trade name, manufactured by Asahi Glass), for example, KP341 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) ), DBE (trade name, manufactured by Chisso Corporation), granol (trade name, manufactured by Kyoeisha Chemical Co., Ltd.), and other organosiloxane surfactants.
- Megafac registered trademark, trade name, manufactured by Dainippon Ink and Chemicals
- Lumiflon registered trademark, trade name, manufactured by Asahi Glass
- KP341 trade name, manufactured by Shin-Etsu Chemical Co., Ltd.
- DBE trade name, manufactured by Chisso Corporation
- granol trade name, manufactured by Kyoeisha Chemical Co., Ltd.
- the amount of the surfactant is preferably 0.01 to 10 parts by mass with respect to 100 parts by mass of the alkali-soluble phenol resin.
- adhesion assistant examples include alkyl imidazoline, butyric acid, alkyl acid, polyhydroxystyrene, polyvinyl methyl ether, t-butyl novolac, epoxy silane, epoxy polymer, and various alkoxy silanes.
- alkoxysilane examples include, for example, tetraalkoxysilane, bis (trialkoxysilyl) methane, bis (trialkoxysilyl) ethane, bis (trialkoxysilyl) ethylene, bis (trialkoxysilyl) hexane, and bis (trialkoxy).
- Examples of the alkyl group in the above compound include methyl group, ethyl group, propyl group, butyl group and the like
- examples of the acid anhydride include maleic acid anhydride, phthalic acid anhydride, 5-norbornene-2,3-
- examples of the acid dianhydride include pyromellitic dianhydride, 3,3 ′, 4,4′-benzophenonetetracarboxylic dianhydride, and 4,4′-oxydiphthalic dianhydride.
- Examples of the urethane group include a t-butoxycarbonylamino group, and examples of the urea group include a phenylaminocarbonylamino group.
- the blending amount of the adhesion aid is preferably 0.1 to 30 parts by mass with respect to 100 parts by mass of the alkali-soluble phenol resin.
- a compound having a hydroxyl group or a carboxyl group is preferable.
- the compound having a hydroxyl group include a ballast agent used in the above-mentioned naphthoquinone diazide compound, paracumylphenol, bisphenols, resorcinol, and linear phenol compounds such as MtrisPC and MtetraPC, TrisP-HAP, TrisP -Non-linear phenolic compounds such as PHBA and TrisP-PA (all manufactured by Honshu Chemical Industry Co., Ltd.), 2-5 phenol substitutes of diphenylmethane, 1-5 phenol substitutes of 3,3-diphenylpropane, A one-to-two reaction product of 2,2-bis- (3-amino-4-hydroxyphenyl) hexafluoropropane and 5-norbornene-2,3-dicarboxylic anhydride, bis- (3-amino-4-hydroxy Phenyl) sulfone
- Examples of the compound having a carboxyl group include 3-phenyllactic acid, 4-hydroxyphenyllactic acid, 4-hydroxymandelic acid, 3,4-dihydroxymandelic acid, 4-hydroxy-3-methoxymandelic acid, 2-methoxy-2 -(1-naphthyl) propionic acid, mandelic acid, atrolactic acid, acetylmandelic acid (eg, O-acetylmandelic acid), ⁇ -methoxyphenylacetic acid, benzoic acid, o-toluic acid, m-toluic acid, p -Toluic acid and the like can be mentioned.
- 3-phenyllactic acid 4-hydroxyphenyllactic acid, 4-hydroxymandelic acid, 3,4-dihydroxymandelic acid, 4-hydroxy-3-methoxymandelic acid, 2-methoxy-2 -(1-naphthyl) propionic acid, mandelic acid, atrolactic acid, acetylmandelic acid (e
- the blending amount of the dissolution accelerator is preferably 0.1 to 30 parts by mass with respect to 100 parts by mass of the alkali-soluble phenol resin.
- crosslinking accelerator those that generate acid, base, and radical by heat or light are preferable.
- examples of those that generate acid by heat or light include TPS-105, 1000, DTS-105, NDS-105, 165 (trade name, manufactured by Midori Chemical Co., Ltd.), DPI-DMAS, TTBPS-TF, TPS-TF, DTBPI.
- Sulfonates such as onium salts such as -TF (trade name, manufactured by Toyo Gosei Co., Ltd.), methyl methanesulfonate, ethyl methanesulfonate, methyl benzenesulfonate, methyl p-toluenesulfonate, methoxyethyl p-toluenesulfonate , NAI-100, 101, 105, 106, PAI-101 (trade name, manufactured by Midori Chemical Co., Ltd.), Irgacure PAG-103, 108, 121, 203, CGI-1380, 725, NIT, 1907, PNBT (trade name, Oxime sulfonates such as BASF Japan) .
- -TF trade name, manufactured by Toyo Gosei Co., Ltd.
- methyl methanesulfonate ethyl methanesulfonate
- U-CATSA-1, 102, 506, 603, 810 (trade name, manufactured by San Apro), CGI-1237, 1290, 1293 (trade name, manufactured by BASF Japan) are those that generate bases by heat or light.
- amine salts such as 2,6-piperidine or butylamine, diethylamine, dibutylamine, N, N'-diethyl-1,6-diaminohexane, hexamethylenediamine, etc. converted to urethane groups or urea groups, etc. Is mentioned.
- Examples of the urethane group include a t-butoxycarbonylamino group, and examples of the urea group include a phenylaminocarbonylamino group.
- radicals generated by heat or light examples include alkylphenones such as Irgacure 651, 184, 2959, 127, 907, 369, 379 (trade name, manufactured by BASF Japan), Irgacure 819 (trade name, manufactured by BASF Japan). ), Etc., titanocene such as Irgacure 784 (trade name, manufactured by BASF Japan), and oxime ester such as Irgacure OXE01, 02 (trade name, manufactured by BASF Japan).
- alkylphenones such as Irgacure 651, 184, 2959, 127, 907, 369, 379 (trade name, manufactured by BASF Japan), Irgacure 819 (trade name, manufactured by BASF Japan).
- Etc. titanocene
- Irgacure 784 trade name, manufactured by BASF Japan
- oxime ester such as Irgacure OXE01, 02 (trade name, manufactured by BASF Japan).
- the degree of elongation of the cured film obtained by curing the photosensitive phenol resin composition for alkali development according to the first aspect of the present invention according to the method described below is preferably 15% or more, more preferably 20% or more. It is.
- the reason for this is that when the photosensitive phenol resin composition for alkali development of the present invention is cured and used as a surface protective film or an interlayer insulating film, cracks are less likely to occur even if heat stress is applied. In addition to improving the reliability, it is also possible to increase the reliability of the semiconductor device having the same.
- the upper limit of the elongation is preferably as large as possible, but is 100%, for example.
- the measuring method of elongation is as follows.
- a photosensitive phenol resin composition for alkali development is spin coated on a silicon wafer, the silicon wafer and the spin coat film are heated on a hot plate at 100 ° C. for 3 minutes, and the spin coat film is heated at 250 ° C. in a nitrogen atmosphere.
- This cured product is cut with a dicing saw at a width of 3 mm, and the silicon wafer is peeled off by treating with a 23% by mass hydrofluoric acid aqueous solution, and further left to stand in an atmosphere at a temperature of 23 ° C. and a humidity of 50% for 24 hours or more.
- a composition containing a photosensitizer is applied to an appropriate support or substrate such as a silicon wafer, a ceramic, an aluminum substrate or the like.
- an adhesion assistant such as a silane coupling agent may be applied to the support or the substrate in advance.
- the composition is applied by spin coating using a spinner, spray coating using a spray coater, dipping, printing, roll coating, or the like.
- the photosensitive phenol resin composition for alkali development is exposed.
- the actinic radiation to be exposed X-rays, electron beams, ultraviolet rays, visible rays and the like can be used, but those having a wavelength of 200 to 500 nm are preferable.
- the light source wavelength is preferably g-line, h-line or i-line of a mercury lamp, which may be used alone or in combination.
- a contact aligner, a mirror projection, and a stepper are particularly preferable.
- developers include inorganic alkalis such as sodium hydroxide, sodium carbonate, sodium silicate, aqueous ammonia, organic amines such as ethylamine, diethylamine, triethylamine, triethanolamine, tetramethylammonium hydroxide, tetrabutylammonium hydroxide.
- An aqueous solution such as a quaternary ammonium salt such as quaternary ammonium salt and an aqueous solution to which an appropriate amount of a water-soluble organic solvent or surfactant such as methanol or ethanol is added as required can be used.
- an aqueous tetramethylammonium hydroxide solution is preferable, and the concentration thereof is preferably 0.5 to 10% by mass, and more preferably 1.0 to 5.0% by mass.
- a relief pattern can be obtained by washing with a rinse solution to remove the developer.
- a rinse solution distilled water, methanol, ethanol, isopropanol or the like can be used alone or in combination.
- a cured relief pattern can be obtained by heating the relief pattern thus obtained.
- the heating temperature is preferably 150 ° C. or higher and 280 ° C. or lower.
- the polyimide or polybenzoxazole is heated by heating to 300 ° C. or more to advance a dehydration cyclization reaction.
- the cured relief pattern manufacturing method according to the first aspect of the present invention does not require this, so that it can be suitably used for semiconductor devices that are vulnerable to heat.
- it is preferably used for a semiconductor device having an insulating layer made of a high-dielectric material or a ferroelectric material having a process temperature restriction, such as an oxide of a refractory metal such as titanium, tantalum, or hafnium. .
- the heat treatment may be performed at 300 to 400 ° C. in the method according to the first aspect of the present invention.
- Such heat treatment can be performed by using a hot plate, an oven, or a temperature rising oven in which a temperature program can be set. Air may be used as the atmospheric gas when the heat treatment is performed, and an inert gas such as nitrogen or argon may be used. Further, when it is necessary to perform heat treatment at a lower temperature, heating may be performed under reduced pressure using a vacuum pump or the like.
- the semiconductor device which has the hardening relief pattern manufactured using the photosensitive phenol resin composition for alkali development in the 1st aspect of this invention is also 1 aspect of this invention.
- the semiconductor device according to the present invention uses the above-described cured relief pattern as a surface protective film, an interlayer insulating film, an insulating film for rewiring, a protective film for a flip chip device, or a protective film for a device having a bump structure. It can manufacture by combining with the manufacturing method of.
- a trihydroxybenzene resin having a biphenyldiyl structure in the main chain (hereinafter also simply referred to as “biphenyldiyltrihydroxybenzene resin”) is a polymer including a repeating unit having a trihydroxybenzene structure and a biphenyldiyl structure.
- the biphenyldiyl trihydroxybenzene resin according to the present invention is synthesized from a specific trihydroxybenzene compound and a compound having a biphenyldiyl group.
- the biphenyldiyltrihydroxybenzene resin according to the present invention has the following general formula (1): ⁇
- R 1 represents the following general formula (2): (Wherein R 3 is a methyl group or an ethyl group, and p and q are each independently an integer of 0 to 4), and R 2 is And a group selected from hydrogen, a methyl group, and an ethyl group, and n is an integer of 2 to 150.
- R 1 represents the following general formula (2): (Wherein R 3 is a methyl group or an ethyl group, and p and q are each independently an integer of 0 to 4), and R 2 is And a group selected from hydrogen, a methyl group, and an ethyl group, and n is an integer of 2 to 150.
- the trihydroxybenzene structure and the biphenyldiyl structure may be bonded in any order.
- the trihydroxybenzene structure and the biphenyldiyl structure are preferably bonded
- the general formula (1) is represented by the following general formula (3): ⁇ Wherein, R 1 and n are the same as those defined in the general formula (1). ⁇ Or the following general formula (4): ⁇ Wherein, R 1 and n are the same as those defined in the general formula (1). ⁇ Is preferable from the viewpoint of more exerting the effect of the second aspect of the present invention.
- the general formula (2) is represented by the following formula (5): It is also preferable from a viewpoint which exhibits the effect of the 2nd aspect of this invention more that it is biphenyldiyl trihydroxybenzene resin represented by these.
- the method for producing a biphenyldiyltrihydroxybenzene resin in the second embodiment of the present invention includes, for example, condensation of a compound having a biphenyldiyl structure (hereinafter also simply referred to as “biphenyldiyl compound”) and a trihydroxybenzene compound. Reaction. Specifically, the following steps: The following general formula (7): ⁇ Wherein R 2 is a group selected from hydrogen, a methyl group, and an ethyl group.
- R 3 is a methyl group or an ethyl group
- p and q are each independently an integer of 0 to 4
- R 4 is a halogen atom, a hydroxyl group, and a carbon number of 1 to 10 It is a group selected from the group consisting of alkoxy groups which may have an unsaturated bond.
- a catalyst is added, and a step of heating at 60 ° C. or higher for 1 minute to 48 hours,
- a biphenyldiyltrihydroxybenzene resin can be produced by a production method comprising
- the benzene ring may have a methyl group or an ethyl group as a substituent other than a hydroxyl group.
- Preferred examples of the trihydroxybenzene compound include 1,2,3-trihydroxybenzene (pyrogallol), 1,3,5-trihydroxybenzene (phloroglucinol), and 1,2,4-trihydroxybenzene. It is done. Of these, 1,2,3-trihydroxybenzene and 1,3,5-trihydroxybenzene are preferable from the viewpoint of developability. These may be used alone or in combination.
- the molar ratio of the trihydroxybenzene compound and the biphenyldiyl compound is 5: 1 to 1: 5, preferably 5: 1 to 1.01: 1, more preferably.
- Acidic catalysts include hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, phosphorous acid, methanesulfonic acid, p-toluenesulfonic acid, dimethyl sulfuric acid, diethyl sulfuric acid, acetic acid, oxalic acid, 1-hydroxyethylidene-1,1'-diphosphone Examples thereof include acid, zinc acetate, boron trifluoride, boron trifluoride / phenol complex, boron trifluoride / ether complex, and the like.
- alkaline catalysts include lithium hydroxide, sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, sodium carbonate, triethylamine, pyridine, 4-N, N-dimethylaminopyridine, piperidine, piperazine, 1, 4-diazabicyclo [2.2.2] octane, 1,8-diazabicyclo [5.4.0] -7-undecene, 1,5-diazabicyclo [4.3.0] -5-nonene, ammonia, hexamethylene Examples include tetramine.
- DMDG diethylene glycol dimethyl ether
- NMP N-methyl-2-pyrrolidone
- DMAc dimethylacetamide
- DMF dimethylformamide
- GBL ⁇ -butyrolactone
- DMSO dimethyl sulfoxide
- the weight average molecular weight of the biphenyldiyltrihydroxybenzene resin is preferably 1,500 to 200,000, more preferably 1,500 to 100,000, and even more preferably 2,000 to 50,000.
- the photosensitive resin composition containing the biphenyldiyltrihydroxybenzene resin is not particularly limited as long as it is a composition that can form a resin pattern in response to radiation including ultraviolet rays, electron beams, and X-rays. Either a negative photosensitive composition or a positive photosensitive composition may be used.
- the photosensitive agent is preferably a photoacid generator.
- the photoacid generator generates an acid upon irradiation with radiation, and the generated acid can cause a crosslinking reaction between the biphenyldiyltrihydroxybenzene resin and a crosslinking agent described later.
- examples of such compounds include trichloromethyl-s-triazines, diaryliodonium salts, triarylsulfonium salts, diazoketone compounds, sulfone compounds, sulfonic acid compounds, sulfonimide compounds, oxime ester compounds, and diazomethane compounds. it can.
- oxime ester compounds are preferable, and specifically, 2- [2- (4-methylphenylsulfonyloxyimino)]-2,3-dihydrothiophene-3-ylidene] -2- (2-methylphenyl) acetonitrile.
- the photosensitive resin composition can also be used as a positive photosensitive composition.
- the photosensitizer is preferably a photoacid generator, and the photoacid generator preferably contains a naphthoquinonediazide derivative.
- the naphthoquinonediazide derivative include compounds having a 1,2-benzoquinonediazide structure or a 1,2-naphthoquinonediazide structure, and these compounds include, for example, US Pat. No. 2,772,972, Nos. 2,797,213 and 3,669,658 are known.
- the naphthoquinonediazide derivative is obtained from 1,2-naphthoquinonediazide-4-sulfonic acid ester of a polyhydroxy compound having a specific structure described in detail below, and 1,2-naphthoquinonediazide-5-sulfonic acid ester of the polyhydroxy compound. And at least one compound selected from the group consisting of the following (hereinafter also referred to as “NQD compound”).
- Examples of preferable NQD compounds from the viewpoint of physical properties of the cured film such as sensitivity and elongation include, for example, the following: ⁇ Wherein Q is a hydrogen atom or the following: And all Qs are not simultaneously hydrogen atoms. ⁇ .
- a naphthoquinone diazide sulfonyl ester compound in which 4-naphthoquinone diazide sulfonyl group and 5-naphthoquinone diazide sulfonyl group are used in the same molecule can be used, or 4-naphthoquinone diazide sulfonyl ester compound and 5-naphthoquinone diazide. It can also be used by mixing with a sulfonyl ester compound.
- the addition amount of the photosensitive agent in the photosensitive resin composition is preferably 1 to 50 parts by mass with respect to 100 parts by mass of the biphenyldiyltrihydroxybenzene resin. If this addition amount is 1 part by mass or more, the amount of acid generated by radiation irradiation will be sufficient and the sensitivity will be improved. If this addition amount is 50 parts by mass or less, the mechanical properties after curing will be good. .
- the crosslinking agent is preferably an epoxy group, an oxetane group, a —N— (CH 2 —OR) group ⁇ wherein R is hydrogen or an alkyl having 1 to 4 carbon atoms. It is a group. ⁇ , And a —C— (CH 2 —OR) group ⁇ wherein R is hydrogen or an alkyl group having 1 to 4 carbon atoms.
- the photosensitive resin composition containing the biphenyldiyltrihydroxybenzene resin takes a varnish form in which these components are dissolved in a solvent.
- the solvent used here include amides, sulfoxides, ureas, ketones, esters, lactones, ethers, halogenated hydrocarbons, hydrocarbons, etc.
- resin solubility resin N-methyl-2-pyrrolidone, dimethylacetamide, dimethylformamide, dimethylsulfoxide, tetramethylurea, butyl acetate, ethyl lactate, ⁇ -butyrolactone, diethylene glycol dimethyl ether, propylene from the viewpoint of stability of the composition and adhesion to the substrate
- Glycol monomethyl ether acetate, propylene glycol monomethyl ether, benzyl alcohol, phenyl glycol, tetrahydrofuran, and tetrahydrofurfuryl alcohol are preferred, and these may be used alone or in combination.
- the amount of the solvent used varies depending on the film thickness obtained, and is used in the range of 70 to 1900 parts by mass with respect to 100 parts by mass of the biphenyldiyltrihydroxybenzene resin.
- the photosensitive resin composition containing the biphenyldiyltrihydroxybenzene resin in the second aspect of the present invention can be used as follows. First, the composition is applied to a suitable substrate, for example, a silicon wafer, a ceramic substrate, an aluminum substrate, or the like, by spin coating using a spinner or a roll coater. This is dried at 50 to 140 ° C. for 10 seconds to 1 hour using an oven or a hot plate, and irradiated with actinic radiation through a mask using a contact aligner or a stepper (exposure process). Next, the irradiated portion is dissolved and removed with a developing solution, and then rinsing with a rinsing solution is performed to obtain a desired relief pattern (developing step).
- a suitable substrate for example, a silicon wafer, a ceramic substrate, an aluminum substrate, or the like. This is dried at 50 to 140 ° C. for 10 seconds to 1 hour using an oven or a hot plate, and irradiated with act
- a developing method methods such as spray, paddle, dip, and ultrasonic can be used.
- a rinsing liquid distilled water, deionized water or the like can be used.
- the obtained relief pattern can be heat-treated at 160 to 380 ° C. for 10 seconds to 2 hours to form a heat resistant coating (heating step).
- the above-mentioned photosensitive resin composition is useful not only for semiconductor applications but also as an interlayer insulation for multilayer circuits, a cover coat for flexible copper-clad plates, a solder resist film and a liquid crystal alignment film.
- Specific preferred examples of semiconductor applications include semiconductor surface protective films, interlayer insulating films, rewiring insulating films, protective films for flip chip devices, protective films for devices having a bump structure, and the like.
- the measurement conditions in the examples are as shown below. ⁇ Weight average molecular weight (Mw)> It was calculated by gel permeation chromatography (GPC) in terms of standard polystyrene (an organic solvent standard sample STANDARD SM-105 manufactured by Showa Denko KK).
- GPC gel permeation chromatography
- Pump JASCO PU-980 Detector: JASCO RI-930
- the B i (giving B i part) even when the coupling position when the compound is bound there is a plurality, one of which Assume that only two are combined. Binding position of the case, two A facing across the B i is, when each having one phenolic hydroxyl group, a phenolic hydroxyl group 2,6-position has the highest priority, except both a hydrogen atom In the case where it is blocked with a substituent of When both of the 2,6-positions can be bonded, the smaller bulkiness of the adjacent 3,5-position substituent is preferential. For example, when A is m-cresol, it is bound to the 6-position.
- two A facing across the B i is, when each having two phenolic hydroxyl groups, if catechols, 3,6-position has the highest priority, as the next priority 4,5 If the -position is resorcinol, the 2-position has the highest priority, and the next priority is the 4,6-position, and if it is a hydroquinone, the 2,6-position has the highest priority.
- the 3,5-position is bonded, and in this case as well, the bonding position is determined in consideration of the bulkiness of adjacent substituents as in the case of one phenolic hydroxyl group.
- two A facing across the B i is, when each having three phenolic hydroxyl groups, if pyrogallols, is selected from 4,6-position while thinking bulkiness adjacent substituents, If both have a substituent other than a hydrogen atom, the 5-position is bonded, and in the case of phloroglucinols, the positions in the 2,4,6-position where there is no substituent are 1,2, In the case of 4-trihydroxybenzenes, the 3-position is bonded to the 5-position if there is a substituent at the 3-position, and the 6-position is bonded if there is also a substituent at the 5-position.
- the substitution positions of all the phenolic hydroxyl groups can be as much as possible. Other than being determined to be a small number, it follows the IUPAC nomenclature.
- the three-dimensional structural formula was calculated.
- the distance between the hydroxyl groups (the shortest distance d i ) is obtained by selecting a pair having a short distance and displaying the distance between oxygen atoms.
- a copolymer using a plurality of kinds of the divalent organic group to use multiple types of divalent organic groups as A, and / or as B i are their weighted average Ask for.
- ⁇ Softening point> According to JIS K5601-2-2, ASP-M2SP (manufactured by Meiho Co., Ltd.) was used, and glycerin was used as a heating medium, and the measurement was made by the ring and ball method. Samples that did not soften when heated to 170 ° C were listed as> 170 ° C.
- ⁇ Reference Example 1 in the first aspect of the present invention Catechol 66.1 g (0.6 mol), 4,4′-bis (methoxymethyl) biphenyl 72.7 g (0.3 mol), diethyl sulfate 2 in a separable flask with a Dean-Stark device with a capacity of 0.5 L 0.1 g (0.15 mol) and 27 g of diethylene glycol dimethyl ether were mixed and stirred at 70 ° C. to dissolve the solid matter.
- the mixed solution was heated to 120 ° C. with an oil bath, and generation of methanol was confirmed from the reaction solution.
- the reaction solution was stirred at 120 ° C. for 2 hours.
- FIG. 1 shows a three-dimensional structural formula of P-1 by the MM2 method of molecular mechanics calculation (molecular mechanics method) performed by SymApps (registered trademark) manufactured by Bio-Rad Laboratories.
- hatched sphere parts represent hydrogen atoms
- sand earth body parts represent oxygen atoms
- white sphere parts represent carbon atoms.
- ⁇ Preparation of photosensitive phenol resin composition for alkali development 100 parts by weight of a phenol resin, 20 parts by weight of a crosslinking agent and 12 parts by weight of a photosensitizer are dissolved in 122 parts by weight of ⁇ -butyrolactone to obtain a homogeneous solution, which is then filtered through a membrane filter having a pore size of 1 ⁇ m, and the alkalis shown in Table 1 A photosensitive phenol resin composition solution for development was prepared.
- phenol resin P-1 to P-3 synthesized in Reference Examples 1 to 3 described above or those shown below were used.
- EP4080G cresol novolac resin, trade name, manufactured by Asahi Organic Materials Co., Ltd.
- HF-4M phenol novolac resin, trade name, manufactured by Meiwa Kasei Co., Ltd.
- MEH-7785-S phenol-biphenyldiyl resin, trade name, manufactured by Meiwa Kasei Co., Ltd.
- MX-270 Nikarak MX-270, trade name, manufactured by Sanwa Chemical Co., Ltd.
- TPPA ⁇ Following (In the formula, 83% of Q has the following structure: And the rest are hydrogen atoms. ) Shows the structure. ⁇
- TC test> A photosensitive phenol resin composition for alkali development is spin-coated on a 6-inch silicon wafer with a clean track-Mark8 (manufactured by Tokyo Electron) and heated on a hot plate at 120 ° C. for 3 minutes to obtain a film having a thickness of 10 ⁇ m. It was. The film thickness was measured with a film thickness measuring device Lambda Ace (Dainippon Screen Mfg. Co., Ltd.). This coating film was exposed by irradiating i-line through a reticle with a test pattern, using a stepper NSR2005i8A (manufactured by Nikon Corporation) having an exposure wavelength of i-line (365 nm) while changing the exposure stepwise.
- a film having no cracks was designated as A, and one having a crack as B.
- IR spectrum measurement device AVATAR 360 FT-IR manufactured by Thermo Scientific Measuring method: Permeation method (KBr tablet)
- FIG. 3 shows the IR spectrum of the resin (P-11).
- Example 2 in the second aspect of the present invention ⁇ Synthesis of biphenyldiyltrihydroxybenzene resin (P-12)> Synthesis was carried out in the same manner as in Example 1 using 50.4 g (0.4 mol) of phloroglucinol instead of pyrogallol in Example 1, and the structure shown below: Biphenyldiyltrihydroxybenzene resin (P-12) having a yield of 70% was obtained. The weight average molecular weight by GPC of the resin (P-12) synthesized in this manner was 32,000 in terms of polystyrene.
- FIG. 4 shows the 1 H-NMR measurement result of the resin (P-12). In FIG.
- FIG. 5 shows the IR spectrum of the resin (P-12).
- Example 4 in the second aspect of the present invention A photosensitive resin composition was prepared in the same manner as in Example 3 except that the resin P-11 in Example 3 was replaced with the resin (P-12) obtained in Example 2, and its lithographic properties and heat resistance were evaluated. .
- the evaluation results are shown in Table 2 below.
- Example 3 a photosensitive resin composition was prepared in the same manner as in Example 3 except that the resin P-11 was changed to the following resin (P-13), and its lithographic properties and heat resistance were evaluated.
- the evaluation results are shown in Table 2 below.
- the weight average molecular weight by GPC of the resin P-13 was 11,000 in terms of polystyrene.
- Example 3 The photosensitive resin compositions obtained in Example 3, Example 4 and Comparative Example 1 were spin-coated on a 6-inch silicon wafer using a spin coater (CLEANTRACK MK-8) manufactured by Tokyo Electron Co., Ltd. Pre-baking was performed on a hot plate for 2 seconds to form a 9 ⁇ m coating film. The film thickness was measured with a film thickness measuring device (Lambda Ace) manufactured by Dainippon Screen Mfg. This coating film was exposed through a reticle with a test pattern using a Nikon stepper (NSR2005i8A) having an exposure wavelength of i-line (365 nm) while changing the exposure stepwise. This was developed using an alkali developer (AZ300MIF developer, 2.38 wt% tetramethylammonium hydroxide aqueous solution) manufactured by AZ Electronic Materials, and a positive relief pattern was formed with a development time of 60 seconds.
- AZ300MIF developer 2.38 wt% tetramethylammonium hydroxide
- the lithography properties of the resulting relief pattern were evaluated according to the following evaluation criteria: A: A 10 micron wide pattern exposed at 700 mJ / cm ⁇ 2 was resolved. B: A 10-micron width pattern exposed at 700 mJ / cm -2 was not resolved.
- a resolution pattern can be formed in an appropriate development time, and the biphenyldiyltri of the present invention can be formed. Since the hydroxybenzene resins (P-11) and (P-12) have higher softening points than the prior art resin (P-13), it can be seen that they have good heat resistance. .
- Example 4 the softening point was not observed in the softening point measurement up to 170 ° C., and the softening point was found to be higher than 170 ° C.
- the photosensitive phenol resin composition for alkali development in the first aspect of the present invention has a surface protective film for semiconductor devices and light emitting devices, an interlayer insulating film, a rewiring insulating film, a protective film for flip chip devices, and a bump structure. It can be suitably used as a protective film for devices, an interlayer insulating film for multilayer circuits, a cover coat for flexible copper-clad plates, a solder resist film, a liquid crystal alignment film, and the like.
- the biphenyldiyltrihydroxybenzene resin composition according to the second aspect of the present invention is a device having a surface protective film, an interlayer insulating film, a rewiring insulating film, a flip chip device protective film, and a bump structure for a semiconductor device and a light emitting device. It can be suitably used as a protective film, an interlayer insulating film of a multilayer circuit, a cover coat of a flexible copper-clad plate, a solder resist film, a liquid crystal alignment film, and the like.
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Abstract
Description
かかる現状に鑑み、本発明の第二の態様において、本発明が解決しようとする課題は、半導体装置に適用した場合に充分なリソグラフィー性(アルカリ可溶性)を有するとともに、耐熱性に優れる樹脂、その製法、該樹脂を用いた組成物、さらに該組成物を用いた半導体装置の製法及び半導体装置を提供することである。
-A-B1-A-B2-A-B3-A-・・・Bi・・・A-Bn-A- (1)
{式中、Aは、それぞれ独立に、フェノール性水酸基を有する炭素数6~25の2価の有機基であり、該Aの結合手はフェノール性水酸基を有する芳香環に存在し、かつ該芳香環には水酸基以外の置換基が存在してもよく;Biは、フェノール性水酸基を有さない炭素数1~15の2価の有機基であり;iは、1以上n以下の整数であり;そしてnは、2以上1,000以下の整数である。}で表される構造を有し、かつ分子力学法によって、該Biを挟んで向かい合う2つのA内のフェノール性水酸基中の酸素原子間の最短距離diを計算することにより得られる該diの平均値(Σdi/n)が9オングストローム(Å)以上であり、かつ軟化点が100℃以上であることを特徴とするアルカリ可溶性フェノール樹脂;
感光剤;及び
溶剤
を含むアルカリ現像用感光性フェノール樹脂組成物。
-X-L-Y-M-Z- (2)
{式中、L及びMは、フェノール性水酸基を有さず、かつフェノール性水酸基以外の置換基を有していてもよい炭素数6~10の2価の芳香族基であり、そしてX、Y及びZは、単結合、炭素数1~2の脂肪族鎖、アミド基、カルボニル基、エステル基、ウレア基、ウレタン基、エーテル基及びチオエーテル基から成る群から選ばれる2価の基である。}
で表される、[1]~[3]のいずれか1項に記載のアルカリ現像用感光性フェノール樹脂組成物。
[1]下記一般式(1):
下記一般式(7):
60℃以上で1分~48時間加熱する工程、
を含む、前記[1]~[4]のいずれかに記載のビフェニルジイルトリヒドロキシベンゼン樹脂の製造方法。
半導体基板上に、前記[6]~[8]のいずれかに記載の感光性樹脂組成物から成る感光性樹脂層を形成する工程、
該感光性樹脂層を活性光線で露光する工程、
該露光された感光性樹脂層を現像してレリーフパターンを得る工程、及び
得られたレリーフパターンを加熱する工程
を含む、半導体装置の製造方法。
本発明の第一の態様における組成物に用いられるアルカリ可溶性フェノール樹脂は、その繰り返し単位にフェノール性水酸基を有する化合物を含む高分子化合物である。
-A-B1-A-B2-A-B3-A-・・・Bi・・・A-Bn-A- (1)
{式中、Aは、それぞれ独立に、フェノール性水酸基を有する炭素数6~25の2価の有機基であり、該Aの結合手はフェノール性水酸基を有する芳香環に存在し、かつ該芳香環には水酸基以外の置換基が存在してもよく;Biは、フェノール性水酸基を有さない炭素数1~15の2価の有機基であり;iは、1以上n以下の整数であり;そしてnは、2以上1,000以下の整数である。}で表される構造を有し、かつ軟化点が100℃以上であることを特徴とする。また、上記一般式(1)において、nは、2以上1,000以下の整数、好ましくは5以上800以下の整数である。
を挟んで向かい合う2つのAにおいて、一方のAのフェノール性水酸基の酸素原子と他方のAのフェノール性水酸基の酸素原子との間の最も近い距離(以下、水酸基間距離又は最短距離diともいう)が、通常のアルカリ可溶性フェノール樹脂のそれと比して長い構造を有することが重要である。したがって、本発明の第一の態様に使用されるアルカリ可溶性フェノール樹脂は、分子力学法によって、Biを挟んで向かい合う2つのA内のフェノール性水酸基中の酸素原子間の最短距離diを計算することにより得られる該diの平均値(Σdi/n)が9オングストローム(Å)以上であることを特徴とする。より詳細には、Biを挟んで向かい合う2つのAが、それぞれ単数又は複数のフェノール性水酸基を有する場合において、一方のAのフェノール性水酸基の酸素原子と、他方のAのフェノール性水酸基の酸素原子との間の最短距離diは、分子力学法によって算出され、そして最短距離diの平均値(Σdi/n)は9Å以上である。
及びBiがそれぞれ1種類の2価の有機基である場合には、A-Bi-Aにおける最短距離diが、最短距離diの平均値(Σdi/n)そのものと等しい。なお、アルカリ可溶性フェノール樹脂が、Aとして複数の種類の2価の有機基を使用するか、及び/又はBiとして複数の種類の2価の有機基を使用した共重合体である場合には、存在し得る結合に対しての距離を上記と同様に求め、その実際の存在割合から加重平均で算出する。例えば、Biとして2種類の化合物(各々Bi’,Bi’’とする)を使用したアルカリ可溶性フェノール樹脂の場合を考える。この時、A-Bi’-Aにおいて、水酸基間距離が5オングストロームであり、そしてA-Bi’’-Aにおいて、水酸基間距離が10オングストロームであるとすると、生成したアルカリ可溶性フェノール樹脂をNMR等で分析し、樹脂中に含まれるBi’とBi’’の比が8/2であった場合には、このアルカリ可溶性フェノール樹脂の水酸基間距離は6オングストロームである。2種以上のアルカリ可溶性フェノール樹脂を混合した場合は、それらの樹脂の混合比率から同様に求めることができる。
アルカリ可溶性フェノール樹脂は、上記一般式(1)中のA部を与える化合物、例えばフェノール性水酸基を有する化合物に対して、上記一般式(1)中のBi部を与える化合物、例えば、フェノール性水酸基を有さない、アルデヒド化合物、メチロール化合物、アルコキシメチル化合物、又はジエン化合物を重合させて得ることができる。
また、フェノール性水酸基を有する、アルデヒド化合物、メチロール化合物、アルコキシメチル化合物、又はジエン化合物を重合に用いることもできる。この場合、これらの化合物のうち、該化合物のフェノール性水酸基を有する芳香環と隣接するA部とを連結する部分をBi部とし、その他の部分をA部とする。
その具体例としては2,6-ビス(ヒドロキシメチル)-p-クレゾール、4,6-ビス(ヒドロキシメチル)-o―クレゾール、2,4-ビス(ヒドロキシメチル)-m-クレゾール、2,6-ビス(メトキシメチル)-p-クレゾール、2,6-ビス(p-ヒドロキシメチルベンジル)-p-クレゾール等が挙げられ、例えば2,6-ビス(ヒドロキシメチル)-p-クレゾールを用いたときにはp-クレゾール構造部をA部、2つのメチレン構造部をBi部とみなし、2,6-ビス(p-ヒドロキシメチルベンジル)-p-クレゾールを用いた時にはp-クレゾール構造部分をA部、2つのp-キシリレン構造部をBi部とみなす。
用いられるフェノール性水酸基を有する化合物の例としては、フェノール、クレゾール、エチルフェノール、プロピルフェノール、ブチルフェノール、アミルフェノール、ベンジルフェノール、アダマンタンフェノール、ベンジルオキシフェノール、キシレノール、カテコール、レゾルシノール、エチルレゾルシノール、ヘキシルレゾルシノール、ハイドロキノン、2,3-ジヒドロキシ安息香酸、2,4-ジヒドロキシ安息香酸、カフェイン酸、3,4-ジヒドロキシ安息香酸、3,5-ジヒドロキシ安息香酸、2,3-ジヒドロキシ安息香酸メチル、2,4-ジヒドロキシ安息香酸メチル、2,6-ジヒドロキシ安息香酸メチル、3,4-ジヒドロキシ安息香酸メチル、3,5-ジヒドロキシ安息香酸メチル、3,4-ジヒドロキシ安息香酸エチル、
アルデヒド化合物としては、ホルムアルデヒド、アセトアルデヒド、プロピオンアルデヒド、ピバルアルデヒド、ブチルアルデヒド、ペンタナール、ヘキサナール、トリオキサン、グリオキザール、シクロヘキシルアルデヒド、ジフェニルアセトアルデヒド、エチルブチルアルデヒド、ベンズアルデヒド、シンナムアルデヒド、ジフェニルアセトアルデヒド、フマルアルデヒド酸メチル、3-メチル-2-ブテナール、グリオキシル酸、5-ノルボルネン-2-カルボキシアルデヒド、マロンジアルデヒド、スクシンジアルデヒド、グルタルアルデヒド、ナフトアルデヒド、テレフタルアルデヒドなどが挙げられる。
メチロール化合物としては、1,3-ビス(ヒドロキシメチル)尿素、リビトール、アラビトール、アリトール、2,2-ビス(ヒドロキシメチル)酪酸、1,3-プロパンジオール、2-ベンジルオキシ-1,3-プロパンジオール、2,2-ジメチル-1,3-プロパンジオール、2,2-ジエチル-1,3-プロパンジオール、モノアセチン、2-メチル-2-ニトロ-1,3-プロパンジオール、5-ノルボルネン-2,2-ジメタノール、5-ノルボルネン-2,3-ジメタノール、ペンタエリスリトール、2-フェニル-1,3-プロパンジオール、トリメチロールエタン、トリメチロールプロパン、3,6-ビス(ヒドロキシメチル)デュレン、2-ニトロ-p-キシリレングリコール、1,10-ジヒドロキシデカン、1,12-ジヒドロキシドデカン、1,4-ビス(ヒドロキシメチル)シクロヘキサン、1,4-ビス(ヒドロキシメチル)シクロヘキセン、1,6-ビス(ヒドロキシメチル)アダマンタン、1,4-ベンゼンジメタノール、1,3-ベンゼンジメタノール、2,6-ビス(ヒドロキシメチル)-1,4-ジメトキシベンゼン、2,3-ビス(ヒドロキシメチル)ナフタレン、2,6-ビス(ヒドロキシメチル)ナフタレン、1,8-ビス(ヒドロキシメチル)アントラセン、2,2’-ビス(ヒドロキシメチル)ジフェニルエーテル、4,4’-ビス(ヒドロキシメチル)ジフェニルエーテル、4,4’-ビス(ヒドロキシメチル)ジフェニルチオエーテル、4,4’-ビス(ヒドロキシメチル)ベンゾフェノン、4-ヒドロキシメチル安息香酸-4’-ヒドロキシメチルフェニル、4-ヒドロキシメチル安息香酸-4’-ヒドロキシメチルアニリド、4,4’-ビス(ヒドロキシメチル)フェニルウレア、4,4’-ビス(ヒドロキシメチル)フェニルウレタン、1,8-ビス(ヒドロキシメチル)アントラセン、4,4’-ビス(ヒドロキシメチル)ビフェニル、2,2’-ジメチル-4,4’-ビス(ヒドロキシメチル)ビフェニル、2,2-ビス(4-ヒドロキシメチルフェニル)プロパン等が挙げられる。
-X-L-Y-M-Z- (2)
{式中、L及びMは、それぞれ独立に、フェノール性水酸基を有さず、かつフェノール性水酸基以外の置換基は有していてもよい炭素数6~10の2価の芳香族基であり、そしてX、Y及びZは、それぞれ独立に、単結合、炭素数1~2の脂肪族基、アミド基、カルボニル基、エステル基、ウレア基、ウレタン基、エーテル基及びチオエーテル基から成る群から選ばれる2価の基である。}
で表される構造が好ましい。
第一の組成物には、感光剤が必須成分として含まれる。感光剤の種類を選択することにより、第一の組成物をポジ型にも、ネガ型にもすることができる。アルカリ現像用感光性フェノール樹脂組成物をポジ型にする場合は、感光剤として光酸発生剤を選ぶことが必要である。ネガ型にする場合には光酸発生剤、又は光塩基発生剤を使用し、後述する架橋剤が必要となる。光酸発生剤としてはナフトキノンジアジド(NQD)化合物、オニウム塩、ハロゲン含有化合物等を用いることができるが、溶剤溶解性及び保存安定性の観点から、後述のNQD化合物が好ましい。
第一の組成物に用いられる溶剤としては、アミド類、スルホキシド類、ウレア類、ケトン類、エステル類、ラクトン類、エーテル類、ハロゲン化炭化水素類、炭化水素類等が挙げられ、例えば、N-メチル-2-ピロリドン、N,N-ジメチルアセトアミド、N,N-ジメチルホルムアミド、ジメチルスルホキシド、テトラメチル尿素、アセトン、メチルエチルケトン、メチルイソブチルケトン、シクロペンタノン、シクロヘキサノン、酢酸メチル、酢酸エチル、酢酸ブチル、シュウ酸ジエチル、乳酸エチル、乳酸メチル、乳酸ブチル、γ-ブチロラクトン、プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノメチルエーテル、ベンジルアルコール、フェニルグリコール、テトラヒドロフルフリルアルコール、エチレングリコールジメチルエーテル、ジエチレングリコールジメチルエーテル、テトラヒドロフラン、モルフォリン、ジクロロメタン、1,2-ジクロロエタン、1,4-ジクロロブタン、クロロベンゼン、o-ジクロロベンゼン、アニソール、ヘキサン、ヘプタン、ベンゼン、トルエン、キシレン、メシチレン等を使用することができる。これらの中でも、樹脂の溶解性、樹脂組成物の安定性、基板への接着性の観点から、N-メチル-2-ピロリドン、ジメチルスルホキシド、テトラメチル尿素、酢酸ブチル、乳酸エチル、γ-ブチロラクトン、プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノメチルエーテル、ベンジルアルコール、フェニルグリコール、テトラヒドロフルフリルアルコールが好ましい。
本発明の第一の態様におけるアルカリ現像用感光性フェノール樹脂組成物には架橋剤がさらに含有されていることが好ましい。
1)エポキシ化合物、例えば、1,1,2,2-テトラ(p-ヒドロキシフェニル)エタンテトラグリシジルエーテル、グリセロールトリグリシジルエーテル、オルソセカンダリーブチルフェニルグリシジルエーテル、1,6-ビス(2,3-エポキシプロポキシ)ナフタレン、ジグリセロールポリグリシジルエーテル、ポリエチレングリコールグリシジルエーテル、イソシアヌル酸トリグリシジル、エピクロン830、850、1050、N-680、N-690、N-695、N-770、HP-7200、HP-820、EXA-4850-1000(商品名、DIC社製)、デナコールEX-201、EX-313、EX-314、EX-321、EX-411、EX-511、EX-512、EX-612、EX-614、EX-614B、EX-731、EX-810、EX-911、EM-150(商品名、ナガセケムテックス社製)、
で表される架橋剤が挙げられる。
本発明の第一の組成物には、必要に応じて、染料、界面活性剤、基板との密着性を高めるための接着助剤、溶解促進剤、架橋促進剤等を含有させることが可能である。
本発明の第一の態様におけるアルカリ現像用感光性フェノール樹脂組成物を下記で説明される方法に従って硬化することにより得られる硬化膜の伸度は、好ましくは15%以上、より好ましくは20%以上である。その理由として、本発明のアルカリ現像用感光性フェノール樹脂組成物を硬化させて、表面保護膜や層間絶縁膜として使用した際に、熱による応力がかかってもクラックを生じにくくし、それの信頼性を高めるだけでなく、それを有してなる半導体装置の信頼性を高めることもできることが挙げられる。伸度の上限値は数値が大きいほど好ましいが、例えば100%である。
アルカリ現像用感光性フェノール樹脂組成物をシリコンウエハー上にスピンコートし、ホットプレート上において該シリコンウエハー及びスピンコート膜を100℃で3分間加熱して、窒素雰囲気下において該スピンコート膜を250℃で1時間硬化して厚さ10μmの硬化物を得る。この硬化物を3mm幅でダイシングソーにより切断して、23質量%フッ酸水溶液で処理することによりシリコンウエハーを剥離して、さらに温度23℃・湿度50%の雰囲気に24時間以上静置して、20本のサンプルを得て、引っ張り試験機(例えば、テンシロン(登録商標、オリンテック社製))にて各サンプルの引っ張り伸度を測定し、20本のサンプルの結果のうち、上位5点のサンプルの平均値を得る。引っ張り試験機の測定条件は以下の通りとする。
温度:23℃
湿度:50%
初期試料長さ:50mm
試験速度:40mm/min.
ロードセル定格:2kgf
本発明の第一の態様におけるアルカリ現像用感光性フェノール樹脂組成物を用いて基板上に硬化レリーフパターンを形成する方法の一例を以下に示す。
また、本発明の第一の態様におけるアルカリ現像用感光性フェノール樹脂組成物を用いて製造した硬化レリーフパターンを有して成る半導体装置も本発明の一態様である。本発明の半導体装置は、上述の硬化レリーフパターンを、表面保護膜、層間絶縁膜、再配線用絶縁膜、フリップチップ装置用保護膜、又はバンプ構造を有する装置の保護膜として、既知の半導体装置の製造方法と組み合わせることで製造することができる。
主鎖にビフェニルジイル構造を有するトリヒドロキシベンゼン樹脂(以下、単に「ビフェニルジイルトリヒドロキシベンゼン樹脂」ともいう。)は、トリヒドロキシベンゼン構造及びビフェニルジイル構造を有する繰り返し単位を含むポリマーである。本発明に係るビフェニルジイルトリヒドロキシベンゼン樹脂は、特定のトリヒドロキシベンゼン化合物とビフェニルジイル基を有する化合物から合成される。
下記一般式(7):
60℃以上で1分~48時間加熱する工程、
を含む製造方法によりビフェニルジイルトリヒドロキシベンゼン樹脂を製造することができる。
ビフェニルジイルトリヒドロキシベンゼン樹脂を含む感光性樹脂組成物は、紫外線、電子線、X 線をはじめとする放射線に感応して樹脂パターンを形成できる組成物であれば、特に限定されるものではなく、ネガ型、ポジ型のいずれの感光性組成物であってもよい。
架橋剤を添加する場合の添加量は、ビフェニルジイルトリヒドロキシベンゼン樹脂100質量部に対して、1~60質量部であることが好ましく、3~50質量部であることがより好ましい。
<重量平均分子量(Mw)>
ゲルパーミエイションクロマトグラフィー(GPC)により、標準ポリスチレン(昭和電工社製 有機溶媒系標準試料 STANDARD SM-105)換算で算出した。使用したGPC装置及び測定条件は以下の通りである。
ポンプ:JASCO PU-980
検出器:JASCO RI-930
カラムオーブン:JASCO CO-965 40℃
カラム:Shodex KD-806M 直列に2本
移動相:0.1mol/l EtBr/N-メチルピロリドン
流速:1ml/min.
まず、バイオラッドラボラトリーズ社製のChemWindow(登録商標)でアルカリ可溶性フェノール樹脂のA-Bi-Aの化学構造式を描く。
、Aとして複数の種類の2価の有機基を使用するか、及び/又はBiとして複数の種類の2価の有機基を使用した共重合体である場合には、それらの加重平均値を求める。
JIS K5601-2-2に従って、ASP-M2SP(明峰社製作所社製)を使用し、熱媒としてグリセリンを用いて、環球法にて測定した。170℃まで昇温しても軟化しなかったサンプルは、>170℃と記載した。
容量0.5Lのディーン・スターク装置付きセパラブルフラスラスコ中で、カテコール66.1g(0.6mol)、4,4’-ビス(メトキシメチル)ビフェニル72.7g(0.3mol)、ジエチル硫酸2.1g(0.15mol)、ジエチレングリコールジメチルエーテル27gを70℃で混合攪拌し、固形物を溶解させた。
P-1について、バイオラッドラボラトリーズ社製のSymApps(登録商標)で行った、分子力学計算(分子力学法)のMM2法による3次元構造式を図1に示す。図1において、斜線球体部は水素原子を表し、砂地球体部は酸素原子を表し、そして白色球体部は炭素原子を表す。
上述した参考例1のカテコールの代わりに、ピロガロール56.7g(0.45mol)を用いて、参考例1と同様に合成を行い、フェノール樹脂(P-2)を収率77%で得た。P-2のGPCによる重量平均分子量は、ポリスチレン換算で7,700であった。
参考例1のカテコールの代わりに、フロログルシノール56.7g(0.45mol)を、4,4’-ビス(メトキシメチル)ビフェニル72.7g(0.3mol)の代わりに2,6-ビス(ヒドロキシメチル)ナフタレン56.5g(0.3mol)を用いて、参考例1と同様に合成を行い、フェノール樹脂(P-3)を収率65%で得た。P-3のGPCによる重量平均分子量は、ポリスチレン換算で5,600であった。
参考例1の4,4’-ビス(メトキシメチル)ビフェニル72.7g(0.3mol)の代わりに、4,4’-ビス(メトキシメチル)ビフェニル36.3g(0.15mol)と1,4-ビス(メトキシメチル)ベンゼン24.9g(0.15mol)を用いて、参考例1と同様に合成を行い、フェノール樹脂(P-4)を収率70%で得た。P-4のGPCによる重量平均分子量は、ポリスチレン換算で7,600であり、1H-NMRにより4,4’-ビス(メトキシメチル)ビフェニル由来のビフェニルジイルユニットと1,4-ビス(メトキシメチル)ベンゼン由来のキシリレンユニットの導入割合は43/57であった。これは、1H-NMRの7~8ppmの領域で、カテコール以外の芳香族の水素原子のピークが現れる領域においての全積分値に対するビフェニルジイル基の2,2’、6,6’位の水素原子のピークである7.6ppmの積分値から読み取ることにより算出した。従って、P-4における水酸基間距離は、以下のように計算される。
(ピロガロール-メチレン-ビフェニルジイル-メチレン-ピロガロール)ユニット:11.346オングストローム
(ピロガロール-キシリレン-ピロガロール)ユニット:8.339オングストローム
P-4:11.346×0.43+8.339×0.57=9.632オングストローム
フェノール樹脂100質量部、架橋剤20質量部、感光剤12質量部をγ-ブチロラクトン122質量部に溶解して均一溶液とした後、孔径1μmのメンブレンフィルターでろ過して、表1で示されるアルカリ現像用感光性フェノール樹脂組成物溶液を調製した。
EP4080G(クレゾールノボラック樹脂、商品名、旭有機材工業社製)
HF-4M(フェノールノボラック樹脂、商品名、明和化成社製)
MEH-7851-S(フェノール-ビフェニルジイル樹脂、商品名、明和化成社製)
架橋剤としては以下のものを用いた。
MX-270(ニカラックMX-270、商品名、三和ケミカル社製)
<伸度>
上述の測定方法に従い、万能試験機テンシロンUTM-II-20(オリエンテック社製)にて測定した。
アルカリ現像用感光性フェノール樹脂組成物をクリーントラック-Mark8(東京エレクトロン社製)により、6インチシリコンウエハー上にスピンコートし、120℃のホットプレートで3分間加熱して、厚み10μmの膜を得た。膜厚は膜厚測定装置ラムダエース(大日本スクリーン製造社製)にて測定した。この塗膜に、テストパターン付きレチクルを通して、i線(365nm)の露光波長を有するステッパーNSR2005i8A(ニコン社製)を用いて露光量を段階的に変化させてi線を照射することにより露光した。次に、クリーントラック-Mark8にて23℃で2.38%テトラメチルアンモニウムヒドロキシド水溶液AZ-300MIF(AZエレクトロニックマテリアルズ社製)を用いて200秒間現像し、純水でリンスした後、縦型キュア炉VF200B(光洋サーモシステム社製)にて窒素雰囲気下で250℃で1時間硬化を行い、硬化レリーフパターンを得た。この段階で50μm四方のレリーフパターンのサイズが現像後の時点と10%以上異なる場合は、表1のTC試験の欄に-と記載した。得られたレリーフパターンをサーマルサイクルチャンバーTSE-11(エスペック社製)を使用して、-65℃~135℃で30分ずつ、1000サイクルの試験を行った後、膜表面を光学顕微鏡で観察した。膜にクラックがないものをA、あるものをBとした。
以下の実施例において使用した測定方法を以下に示す。
(1)ゲルパーミエイションクロマトグラフィー(GPC)測定
カラム:昭和電工社製 商標名 Shodex KD-806M(直列に2本)
容離液:NMP(0.01mol/L、LiBr) 40℃
流速:1.0ml/分
検出器:JASCO RI-930
装置:日本電子株式会社製 ECS400
溶媒:ISOTEC 重ジメチルスルホキシド(DMSO-d6)
測定温度:25℃
装置:Thermo Scientific社製 AVATAR 360 FT-IR
測定方法:透過法(KBr錠剤)
<ビフェニルジイルトリヒドロキシベンゼン樹脂(P-11)の合成>
容量0.5リットルのディーン・スターク装置付きセパラブルフラスラスコ中で、ピロガロール50.4g(0.4mol)、4,4’-ビス(メトキシメチル)ビフェニル72.7g(0.3mol)、ジエチル硫酸2.1g(0.15mol)、DMDG27gを70℃で混合攪拌し、固形物を溶解させた。
混合溶液をオイルバスにより120℃に加温し、反応液よりメタノールの発生を確認した。そのまま120℃で反応液を2時間攪拌した。
次に反応容器を大気中で冷却し、これに別途テトラヒドロフラン100gを加えて攪拌した。上記反応希釈液を4Lの水に高速攪拌下で滴下し樹脂を分散析出させ、これを回収し、適宜水洗、脱水の後に真空乾燥を施し、以下に示す構造:
このようにして合成された樹脂(P-11)のGPCによる重量平均分子量は、ポリスチレン換算で11,000であった。図2に、樹脂(P-11)の1H-NMRの測定結果を示す。図2中、1H-NMRシグナルピーク:3.8ppm(m)、6.0~6.5ppm(m)、7.0~7.2ppm(br)、7.5ppm(br)、8.2ppm(t)、8.8ppm(s)であった。また、図3に、樹脂(P-11)のIRスペクトルを示す。
<ビフェニルジイルトリヒドロキシベンゼン樹脂(P-12)の合成>
実施例1のピロガロールの代わりに、フロログルシノール50.4g(0.4mol)を用いて、実施例1と同様に合成を行い、以下に示す構造:
このようにして合成された樹脂(P-12)のGPCによる重量平均分子量は、ポリスチレン換算で32,000であった。
図4に、樹脂(P-12)の1H-NMRの測定結果を示す。図4中、1H-NMRシグナルピーク:3.6~4.0ppm(m)、5.8~6.2ppm(m)、7.3ppm(d-d)、8.1ppm(br)、8.9~9.2ppm(m)であった。また、図5に、樹脂(P-12)のIRスペクトルを示す。
<感光性樹脂組成物の調製、及びその評価>
実施例1で得た樹脂(P-11):100質量部、下記構造:
実施例3において樹脂P-11を実施例2で得た樹脂(P-12)に替えた以外は実施例3と同様に感光性樹脂組成物を調製し、そのリソグラフィー性・耐熱性を評価した。評価結果を以下の表2に示す。
実施例3において、樹脂P-11を、下記樹脂(P-13)に替えた以外は実施例3と同様に感光性樹脂組成物を調製し、そのリソグラフィー性・耐熱性を評価した。評価結果を以下の表2に示す。
樹脂P-13:MEH-7851-4H(ビフェニルジイルフェノール樹脂、明和化成社製)
実施例3、実施例4、及び比較例1で得た感光性樹脂組成物を、東京エレクトロン社製スピンコーター(CLEANTRACK MK-8)にて、6インチシリコンウエハーにスピン塗布し、120℃、180秒間ホットプレートにてプリベークを行い、9μmの塗膜を形成した。膜厚は大日本スクリーン製造社製膜厚測定装置(ラムダエース)にて測定した。この塗膜に、テストパターン付きレチクルを通してi線(365nm)の露光波長を有するニコン社製ステッパー(NSR2005i8A)を用いて露光量を段階的に変化させて露光した。これをAZエレクトロニックマテリアルズ社製アルカリ現像液(AZ300MIFデベロッパー、2.38重量%水酸化テトラメチルアンモニウム水溶液)を用い、現像時間60秒で現像を行い、ポジ型レリーフパターンを形成した。
A:700mJ/cm-2で露光された10ミクロン幅のパターンが解像された。
B:700mJ/cm-2で露光された10ミクロン幅のパターンが解像されなかった。
樹脂(P-11)、樹脂(P-12)、及び樹脂(P-13)の軟化点を、JIS K 2207に従って測定した。使用した装置は、メイテック社製 ASP-M2SPであった。
Claims (18)
- 下記一般式(1):
-A-B1-A-B2-A-B3-A-・・・Bi・・・A-Bn-A- (1)
{式中、Aは、それぞれ独立に、フェノール性水酸基を有する炭素数6~25の2価の有機基であり、該Aの結合手はフェノール性水酸基を有する芳香環に存在し、かつ該芳香環には水酸基以外の置換基が存在してもよく;Biは、フェノール性水酸基を有さない炭素数1~15の2価の有機基であり;iは、1以上n以下の整数であり;そしてnは、2以上1,000以下の整数である。}で表される構造を有し、かつ分子力学法によって、該Biを挟んで向かい合う2つのA内のフェノール性水酸基中の酸素原子間の最短距離diを計算することにより得られる該diの平均値(Σdi/n)が9オングストローム(Å)以上であり、かつ軟化点が100℃以上であることを特徴とするアルカリ可溶性フェノール樹脂;
感光剤;及び
溶剤
を含むアルカリ現像用感光性フェノール樹脂組成物。 - 前記アルカリ現像用感光性フェノール樹脂組成物を硬化することにより得られる硬化膜の伸度が15%以上である、請求項1に記載のアルカリ現像用感光性フェノール樹脂組成物。
- 前記diの平均値(Σdi/n)は、10オングストローム(Å)以上である、請求項1又は2に記載のアルカリ現像用感光性フェノール樹脂組成物。
- 前記Biは、下記一般式(2):
-X-L-Y-M-Z- (2)
{式中、L及びMは、フェノール性水酸基を有さず、かつフェノール性水酸基以外の置換基を有していてもよい炭素数6~10の2価の芳香族基であり、そしてX、Y及びZは、単結合、炭素数1~2の脂肪族鎖、アミド基、カルボニル基、エステル基、ウレア基、ウレタン基、エーテル基及びチオエーテル基から成る群から選ばれる2価の基である。}
で表される、請求項1~3のいずれか1項に記載のアルカリ現像用感光性フェノール樹脂組成物。 - 前記Aは2~3個のフェノール性水酸基を有する、請求項1~4のいずれか1項に記載のアルカリ現像用感光性フェノール樹脂組成物。
- 架橋剤をさらに含む、請求項1~5のいずれか1項に記載のアルカリ現像用感光性フェノール樹脂組成物。
- 請求項1~6のいずれか1項に記載のアルカリ現像用感光性フェノール樹脂組成物を基板に塗布する工程、該アルカリ現像用感光性フェノール樹脂組成物を露光する工程、露光したアルカリ現像用感光性フェノール樹脂組成物を現像してレリーフパターンを形成する工程、及び該レリーフパターンを加熱して硬化レリーフパターンを形成する工程を含む、硬化レリーフパターンの製造方法。
- 請求項7に記載の製造方法により得られる硬化レリーフパターンを有して成る半導体装置。
- 請求項9~12のいずれか1項に記載のビフェニルジイルトリヒドロキシベンゼン樹脂又は請求項13に記載の製造方法によって得られた樹脂、及び感光剤を含有することを特徴とする感光性樹脂組成物。
- 前記感光剤が光酸発生剤である、請求項14に記載の感光性樹脂組成物。
- 前記感光剤がナフトキノンジアジド化合物である、請求項14に記載のポジ型感光性樹脂組成物。
- 以下の工程:
半導体基板上に、請求項14~16のいずれか1項に記載の感光性樹脂組成物から成る感光性樹脂層を形成する工程、
該感光性樹脂層を活性光線で露光する工程、
該露光された感光性樹脂層を現像してレリーフパターンを得る工程、及び
得られたレリーフパターンを加熱する工程
を含む、半導体装置の製造方法。 - 請求項17に記載の方法により製造された半導体装置。
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JP2014178471A (ja) * | 2013-03-14 | 2014-09-25 | Asahi Kasei E-Materials Corp | 感光性樹脂組成物、硬化レリーフパターンの製造方法、半導体装置及び表示体装置 |
JP2014186124A (ja) * | 2013-03-22 | 2014-10-02 | Asahi Kasei E-Materials Corp | 感光性樹脂組成物、硬化レリーフパターンの製造方法、半導体装置及び、表示体装置 |
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WO2019050047A1 (ja) * | 2017-09-11 | 2019-03-14 | 明和化成株式会社 | フォトレジスト用フェノール樹脂組成物及びフォトレジスト組成物 |
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