WO2008075575A1 - 感光性エレメント - Google Patents
感光性エレメント Download PDFInfo
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- WO2008075575A1 WO2008075575A1 PCT/JP2007/073702 JP2007073702W WO2008075575A1 WO 2008075575 A1 WO2008075575 A1 WO 2008075575A1 JP 2007073702 W JP2007073702 W JP 2007073702W WO 2008075575 A1 WO2008075575 A1 WO 2008075575A1
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- Prior art keywords
- support film
- meth
- group
- photosensitive
- photosensitive element
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Classifications
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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
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/033—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl 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
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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
- G03F7/0045—Photosensitive materials with organic non-macromolecular light-sensitive compounds not otherwise provided for, e.g. dissolution inhibitors
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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
Definitions
- the present invention relates to a photosensitive element.
- a layer made of a photosensitive resin composition (hereinafter referred to as “photosensitive layer”), a support film, and a protective film
- the photosensitive element comprised by is widely used.
- a printed wiring board is manufactured as follows, for example. First, after removing the protective film of the photosensitive element from the photosensitive layer, the photosensitive layer is laminated on the conductive film of the circuit forming substrate. Next, after pattern exposure is performed on the photosensitive layer, the unexposed portion is removed with a developing solution to form a resist pattern. A printed wiring board is formed by patterning the conductive film based on the resist pattern.
- an alkaline aqueous solution such as a sodium hydrogen carbonate solution is mainly used.
- the developer usually has a capability of dissolving the photosensitive layer to some extent, and at the time of development, the photosensitive layer is dissolved or dispersed in the developer.
- the contact area between the circuit forming substrate and the photosensitive layer, which is a resist material has become smaller. Therefore, the photosensitive layer is required to have excellent mechanical strength, chemical resistance, and flexibility in the etching or plating process, as well as excellent adhesion to the circuit forming substrate and excellent resolution in pattern formation. Yes.
- a support film provided on a photosensitive element is peeled off before exposure and exposure is performed without using a support film.
- the photo tool may be directly adhered to the photosensitive layer.
- the photosensitive layer usually has a certain degree of tackiness, it is difficult to remove the adhered phototool when the phototool is directly adhered to the photosensitive layer for exposure.
- the phototool is contaminated by the photosensitive layer, or the photosensitive layer is exposed to oxygen in the atmosphere by peeling off the support film, so that the photosensitivity tends to be lowered.
- Patent Documents 1 and 2 propose a method of providing an intermediate layer between a support film and a photosensitive layer.
- Patent Documents 3 and 4 disclose a method in which two or more photosensitive layers are formed and a layer that is in direct contact with the phototool is made non-adhesive.
- Patent Document 1 JP 59-097138 A
- Patent Document 2 Japanese Patent Laid-Open No. 63-197942
- Patent Document 3 Japanese Patent Laid-Open No. 01-221735
- Patent Document 4 Japanese Patent Laid-Open No. 02-230149
- the present invention has been made in view of the above circumstances, and can sufficiently reduce adhesion of foreign matter and photomask to a support film, and form a resist pattern with sufficiently excellent resolution and high sensitivity.
- the present inventors have found that adherence of foreign matter to a conventional photosensitive element or sticking to a support film such as a photomask is a support. It was found that this was caused by an increase in surface resistivity accompanying a decrease in film thickness. Furthermore, the present inventors have found that the structure of the monomer unit constituting the binder polymer affects the resolution, photosensitivity, adhesion, resist shape after development, flexibility, and releasability after adhesion. . Therefore, as the support film, a film having a sufficiently low surface resistivity only by haze is adopted, and further, a binder polymer containing a compound having a specific structure as a monomer unit is achieved. The present invention has been completed.
- the present invention is a photosensitive element comprising a support film and a layer made of a photosensitive resin composition provided on the first main surface of the support film.
- one A layer made of a photosensitive resin composition having a surface resistivity of 10 13 ⁇ or less on the second main surface opposite to the first main surface of the support film.
- R 1 represents a hydrogen atom or a methyl group
- R 2 represents an alkynole group having 3 to 7 carbon atoms.
- the photosensitive element can sufficiently reduce the adhesion of foreign matters to the support film and the sticking of a photomask, can form a resist pattern with sufficiently excellent resolution and high sensitivity, and has a close contact. Property, resist shape after development, flexibility, and peelability after adhesion.
- the binder polymer preferably contains 5 to 45% by mass of the compound represented by the general formula (I) and 20 to 40% by mass of (meth) acrylic acid as monomer units! /.
- the resulting photosensitive element is further improved in terms of resolution, photosensitivity, adhesion, resist shape after development, flexibility, and peelability after adhesion. It will be excellent.
- the binder polymer further includes styrene and / or a styrene derivative as a monomer unit.
- the obtained photosensitive element further improves resolution, photosensitivity, adhesion, resist shape after development, flexibility, and peelability after sticking.
- the support film is preferably a film containing as a main component at least one polymer selected from the group consisting of polyethylene terephthalate, polypropylene, polyethylene, and polyester.
- the obtained photosensitive element can further reduce the adhesion of foreign matters to the support film and the sticking of the photomask, and can form a resist pattern with excellent resolution and high sensitivity. Become.
- the present invention it is possible to sufficiently reduce the adhesion of foreign matters to the support film and the sticking of a photomask, and to form a resist pattern with sufficiently excellent resolution and high sensitivity. It is possible to provide a photosensitive element that is sufficiently excellent in resist shape after development, flexibility, and peelability after adhesion.
- FIG. 1 is a schematic cross-sectional view showing a preferred embodiment of the photosensitive element of the present invention.
- a layer composed of a photosensitive resin composition (photosensitive layer).
- (meth) acrylic acid means “acrylic acid” and “methacrylic acid” corresponding thereto.
- (meth) atalylate” means “atarylate” and its corresponding “methacrylate”
- (meth) atalyloxy group means “atallyloxy group” and its corresponding “methacryloxy group”.
- (meth) atalyloyl group means “atalyloyl group” and the corresponding “metataloyl group”.
- FIG. 1 is a schematic cross-sectional view showing a preferred embodiment of the photosensitive element of the present invention.
- the photosensitive element 1 shown in FIG. 1 includes a support film 10 and a photosensitive layer 20.
- the photosensitive layer 20 is provided on the first main surface 12 of the support film 10.
- the support finalem 10 has a second main surface 14 on the side opposite to the first main surface 12.
- the thickness of the support film 10 is 1.0% or less.
- ⁇ Izu means haze and is a value measured using a commercially available haze meter (turbidimeter) in accordance with the method specified in JIS K 7105.
- the thickness of the support film 10 is from 0 to; 1.0%.
- the force S is preferably from 0 to 0.5%. And is more preferably 0 to 0.3%. -If the value exceeds 1.0%, the resolution decreases and the shape of the side surface of the resist pattern tends to be disturbed.
- the thickness of the support film 10 can be adjusted within the above numerical range by a conventionally known method. For example, changing the size, content, etc. of inorganic and / or organic fine particles contained in the support film, and making the support film a two-layer structure of A / B or a three-layer structure of A / B / A Thus, it can be adjusted by adjusting the film thickness of the A layer containing fine particles.
- the surface resistivity (hereinafter simply referred to as "surface resistivity") of the second main surface 14 of the support film 10 is 10 13 ⁇ or less.
- the surface resistivity is preferably 10 12 ⁇ or less, more preferably 10 ⁇ ⁇ or less.
- the lower limit of the surface resistivity is not particularly limited, but is preferably 10 6 ⁇ or more.
- the surface resistivity exceeds 10 13 ⁇ , when a resist pattern is formed using the photosensitive element 1, static electricity is likely to be generated when the photosensitive layer 20 is laminated and exposed. Thereby, adhesion of foreign matter to the support film 10 and sticking of the photomask and / or the photosensitive layer 20 to the support film 10 tend to occur easily.
- the surface resistivity can be measured using a Hewlett-Packard 4329 ⁇ high resistance meter. The measurement temperature at this time is 26 ° C and the measurement time is 1 minute.
- the surface resistivity of the support film 10 can be adjusted within the above numerical range by adding an appropriate amount of an antistatic agent to the film raw material when the film is produced. Further, the surface resistivity of the support film 10 can be adjusted as follows. That is, the support film 10 has a multilayer structure of two or more layers, and among those layers, a layer having a surface resistivity of 10 13 ⁇ or less is adopted as the layer having the second main surface. And the support body film 10 is obtained by laminating
- the support film 10 may be a single layer or a multilayer. However, in order to easily adjust both the haze and the surface resistivity within the above numerical range, a multilayer structure of two or more layers is preferable. Further, the support film 10 may contain an antistatic agent or the like, if necessary, as long as its photosensitive characteristics are not impaired.
- the material of the support film 10 is not particularly limited as long as it satisfies the above conditions.
- the support film 10 is a film containing at least one selected from the group consisting of polyethylene terephthalate, polypropylene, polyethylene and polyester, for example.
- the support film 10 is a photosensitive element among commercially available general industrial films.
- What can be used as a support film of 1 may be obtained, processed suitably, and used.
- Examples of commercially available general industrial films that can be used as the support film 10 include “Cosmo Shine A-1517” (trade name, manufactured by Toyobo Co., Ltd.), which is a polyester film.
- the thickness of the support film 10 is preferably 5 to 20 111, more preferably 8 to 18 m, and even more preferably 10 to 16.
- the thickness is less than 5 111, the support film 10 tends to be easily broken when the support film 10 is peeled from the photosensitive element 1.
- the thickness exceeds 20 m, the resolution tends to decrease and the price tends to be inferior.
- the photosensitive layer 20 is a layer made of a photosensitive resin composition.
- the photosensitive resin composition constituting the photosensitive layer 20 is a compound represented by the above general formula (I), a binder polymer containing (meth) acrylic acid alkyl ester and (meth) acrylic acid as monomer units, photopolymerizable Contains a compound and a photoinitiator.
- the binder polymer preferably contains (meth) acrylic acid alkyl ester and (meth) acrylic acid, which are compounds represented by the general formula (I), as monomer units! /.
- 3 to 7 is preferred, and 4 to 6 is more preferred. 4 is particularly preferred. If the number of carbon atoms is less than 3, resist tailing occurs during development, and the resist shape after development tends to become rough.If the number of carbon atoms exceeds 7, the adhesion of the resist and the peelability after mating decrease. Tend to.
- Examples of the (meth) acrylic acid alkyl ester include, for example, propyl (meth) acrylate, butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate and (meth) acrylic acid. Examples include heptyl and structural isomers thereof. Furthermore, on The alkyl group may have a substituent such as a hydroxyl group, an epoxy group, or a halogen group.
- the content of the (meth) acrylic acid alkyl ester is preferably 5 to 45% by mass, more preferably 15 to 40% by mass with respect to the entire binder polymer. It is particularly preferably 35% by mass. In the content is less than 5 mass% will tend to resist shape becomes rough due to the generation of the resist skirt, exceeds 45 mass 0/0, the adhesion of the resist tends to decrease.
- the content of the (meth) acrylic acid forces S preferably from 10 to 40 wt% based on the total binder polymer, more preferably tool 20 to be 15 to 35 mass 0/0 and particularly preferably 30 mass 0/0. If this content is less than 10% by mass, the alkali developability tends to decrease, and if it exceeds 40% by mass, the adhesion tends to decrease.
- the binder polymer contains, in addition to (meth) acrylic acid alkyl ester and (meth) acrylic acid, which are compounds represented by the above general formula (I), other polymerizable monomers as monomer units. Also good.
- other polymerizable monomers include polymerizable styrene derivatives such as styrene, butyltoluene, ⁇ -methylstyrene, ⁇ methylstyrene, and ⁇ ethylstyrene, esters of butyl alcohol such as acrylamide, acrylonitrile, and bulge butyl ether ( (Meth) acrylic acid tetrahydrofurfuryl ester, (meth) acrylic acid dimethylaminoethyl ester, (meth) acrylic acid jetylaminoethyl ester, (meth) acrylolic acid glycidino estenole, 2, 2, 2 Loetinore (meth) acrylate, 2, 2, 3,
- the binder polymer preferably contains styrene and / or a styrene derivative as a monomer unit from the viewpoint of adhesion and chemical resistance (plating resistance).
- the binder polymer contains 3 to 20% by mass. It is particularly preferable to contain 3 to 7% by mass. This content is 3 quality If the amount is less than %%, there is a tendency for the tight adhesion to be lowered. The flexibility of the Resististist is expected to exceed 2200% by mass. There is a tendency for the softness to decrease and the peelability after peeling off to decrease. .
- the weight average weight average molecular weight of Baby Indah-PolyPolyrimomer is from 1155000000 to;; It's more like this and Kaka, which is between 22,000,000 and ⁇ 8800,000, and even more like this and Kaka that is between 3300,000 and ⁇ 6600,000. . If the average weight of the average weight average molecular weight is less than less than 1155 million, the photosensitive layer tends to become brittle and brittle, and 11000000 0000. If the value exceeds 1, the residual state of the thread-like phenomenon is generated, and the resolution tends to be lowered. . In addition, the above-mentioned weight amount average average molecular weight amount is measured and determined according to the Geger Luper Palmer This is the result of using the value obtained by converting the standard quasi-polypolystyrene conversion. .
- the acid value of the Baby Indah-PolyPolyrimmer is 3300 to 220,000 mmggKKOOHH // gg, and this is a favorable condition. 4455 to 11 5500 mmggKKOOHH // gg This is what I'm looking for, but it's much better! . If the acid value here is less than 3300mmggKKOOHH // gg, there is a tendency to have a longer time for the current developed image, exceeding 220000mmggKKOOHH // gg. In other words, there is a tendency for the acidity of the resist resist that has been light-cured to harden to decrease the acid acidity of the developed resist solution to a low level. .
- an ethylenylene-based unsaturated unsaturated bond that can be polymerized in a molecular weight is available.
- oxoxysia alkylkilenen units having a carbon number of 22 to 66 (A It may be preferable to include a compound having a molecular weight of 44 to 4400 in the molecular numerator.
- Such photo-photopolymerization compound such as here improves the compatibility with Baiba Indah-PolyPolymermer and improves the compatibility. Can be completed. .
- the above-mentioned oxoxysia aralkylylene units having a carbon number of 22 to 66 are represented by the following: Oxoxy propylpyrylene unit, Oxoxy isopsopropylene unit, Oxoxybutyrylene unit, Oxoxypentopentyrene unit and Hexoxysilylene unit units are listed, and among these, the above-mentioned Oxyxia Aralkylylene unit units are mentioned above. From the viewpoint of improving the resolution and anti-shattering properties, the single unit of oxyxitylene tylene is Rank or
- the bisphenol A-based (meth) acrylate compound is preferably a compound represented by the following general formula ( ⁇ ).
- R 3 and R 4 each independently represent a hydrogen atom or a methyl group, and preferably a methyl group.
- X 1 and X 2 each independently represent an alkylene group having 2 to 6 carbon atoms.
- X 1 and X 2 are preferably an ethylene group or a propylene group, and more preferably an ethylene group.
- p and q are positive integers selected so that the value of p + q is 4 to 40.
- the value of p + q is preferably 6 to 34, more preferably 8 to 30, more preferably 8 to 28, and most preferably 8 to 20. 8 to; 16 is very preferable. 8 to 12 is most preferable.
- Examples of the alkylene group having 2 to 6 carbon atoms include an ethylene group, a propylene group, an isopropylene group, a butylene group, a pentylene group, and a hexylene group.
- an ethylene group or an isopropylene group is preferable from the viewpoint of improving resolution and plating resistance.
- the phenylene group in the above formula (II) may have a substituent.
- substituents include a halogen atom, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, a 6 to 6 carbon atom; an aryl group, a phenacyl group, an amino group, and 1 to carbon atoms having 18 carbon atoms; 10 alkylamino groups, dialkylamino groups having 2 to 20 carbon atoms, nitro group, cyano group, carbonyl group, Mercapto group, C1-C10 alkyl mercapto group, aryl group, hydroxyl group, C1-C20 hydroxyalkyl group, carboxyl group, alkyl group having 1-10 carbon atoms, alkyl group carbon An acyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an alkoxycarbonyl group having 1 to 20 carbon atom
- the above substituents may form a condensed ring, and the hydrogen atom in these substituents may be substituted with the above substituent such as a halogen atom.
- the number of substituents is 2 or more, each of the two or more substituents may be the same or different.
- Examples of the compound represented by the above formula (II) include 2, 2 bis (4-((meth) atalyloxypolyethoxy) phenyl) propane, 2, 2 bis (4 (((meth)) talyloxypolypropoxy). ) Bisphenol A, such as phenenole) propane, 2, 2 bis (4 ((meth) atalyloxypolybutoxy) phenenole) propan, 2, 2 bis (4 ((meth) atalyloxypolyethoxypolypropoxy) phenyl) propane Examples include system (meth) acrylate compounds.
- Examples of 2, 2 bis (4 ((meth) ataryloxypolyethoxy) phenyl) propane include, for example, 2, 2 bis (4 (((meth) atalyoxydiethoxy) phenyl) propane, 2, 2 Bis (4 — ((meth) Ataryloxytriethoxy) phenyl) propane, 2, 2 Bis (4— ((Meth) Atarioxyxytetraethoxy) phenol) propane, 2, 2 Bis (4 ((Meth) Atalyloxypentaethoxy) phenenole) propane, 2, 2 bis (4 ((meth) atalyloxyhexaethoxy) phenol) propane, 2, 2 bis (4 (((meth) ataryloxyheptaethoxy) phenyl) propane , 2, 2 bis (4 ((meth) atarioxyxytaethoxy) phenole) propane, 2,2 bis (4 (((meth) ataryloxynonethoxy) phenol) propane, 2,2 bis (4 (((meth
- 2, 2 bis (4- (methacryloxypentaethoxy) fenenole) propane is commercially available as BPE-500 (product name, manufactured by Shin-Nakamura Chemical Co., Ltd.).
- BPE-1300 commercially available as BPE-1300 (trade name, manufactured by Shin-Nakamura Chemical Co., Ltd.).
- Examples of 2, 2 bis (4 (((meth)) talyloxypolyethoxypolypropoxy) phenyl) propane include, for example, 2, 2 bis ((-((meth)) talioxydiethoxyoctapropoxy) Phenyl) propane and 2,2 bis (4 ((meth) atalyloxyhexaethoxyhexaoxy) phenyl) propane. These may be used alone or in combination of two or more.
- Preferred examples of the polyalkylene glycol di (meth) acrylate include compounds represented by the following general formula (III).
- R 5 and R 6 each independently represent a hydrogen atom or an alkyl group having 13 carbon atoms, and is preferably a methyl group.
- ⁇ 2 and ⁇ 3 represent an alkylene group having 26 carbon atoms, preferably an ethylene group or a propylene group.
- st and u are integers of 0 30 selected so that the value of s + t + u is 440.
- the value of s + t + u is preferably 530, more preferably 823, and particularly preferably 10 to 15; If the value of s + t + u is less than 4, the boiling point of the compound tends to decrease, and the odor of the photosensitive layer 20 tends to increase. On the other hand, if s + t + u exceeds 40, the concentration of photoreactive sites per unit mass tends to be low, and there is a tendency that practical sensitivity cannot be obtained.
- st and — (Y 3 O) —) contain, for example, oxyethylene units and oxypropylene units.
- the plurality of oxyethylene units and the oxypropylene units may be present at random without the necessity of being continuously present in blocks.
- the secondary carbon of the propylene group may be bonded to the oxygen atom, or the primary carbon may be bonded to the oxygen atom.
- Preferable examples of the compound represented by the above general formula (III) include compounds represented by the following general formulas (IV), (V) and (VI). These can be used alone or in combination of two or more.
- R 7 and R 8 each independently represent a hydrogen atom or an alkyl group having carbon numbers;! To 3, EO represents an oxyethylene unit, and PO represents an oxypropylene unit. m 2 and n 1 are! ⁇ +! ⁇ +! ⁇ Ni ⁇ . The integer of 1-30 chosen so that it may become.
- R 9 and R 1 () each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms
- EO represents an oxyethylene unit
- PO represents an oxypropylene unit.
- Examples of the alkyl group having 1 to 3 carbon atoms in the general formulas (IV), (V), and (VI) include a methyl group, an ethyl group, an n-propyl group, and an isopropyl group.
- the total number of repeating oxyethylene units fc Cm '+ m 2 , m 3 and m 4 ) in the general formulas (IV), (V) and (VI) is each independently an integer of 1 to 30. It is particularly preferable that it is an integer of! To 10, more preferably an integer of 4 to 9, and even more preferably an integer of 5 to 8. If the number of repetitions exceeds 30, the tent reliability tends to deteriorate and the resist shape tends to be coarse.
- the total number (n 1 , n 2 + n 3 and n 4 ) of the repeating units of the oxypropylene units in the general formulas (IV), (V) and (VI) are each independently an integer of 1 to 30 It is preferably an integer of 5 to 20, more preferably S, more preferably an integer of 8 to 16 and particularly preferably an integer of 10 to 14; If the number of repetitions exceeds 30, the resolution tends to decrease and sludge tends to occur.
- photopolymerizable compound in addition to the above-described photopolymerizable compound having an ethylenically unsaturated bond polymerizable in the molecule, another photopolymerizable compound having an ethylenically unsaturated bond may be used. It can be included.
- the polymerizable compound include nourphenoxypolyethyleneoxy (meth) atrelate, nourphenoxypolypropyloxyoxy (meth) acrylate, nourphenoxypolyethylene oxypolypropyloxy (meth) acrylate, and the like.
- the photosensitive resin composition of the present invention may contain a photopolymerizable compound other than the above-mentioned photopolymerizable compound.
- a photopolymerizable compound include a compound obtained by reacting a glycidyl group-containing compound with an ⁇ , ⁇ unsaturated carboxylic acid, and a urethane monomer such as a (meth) acrylate compound having a urethane bond in the molecule.
- Examples of the photopolymerization initiator include benzophenone; ;, N'-tetraalkyl-4,4'-diaminobenzophenone, such as ⁇ , N'-tetramethyl-4,4'-diaminobenzophenone (Michler's ketone), and the like.
- 2,4,5 triarylimidazole dimer the substituents of the two 2,4,5 triarylimidazole aryl groups may give the same and symmetric compounds, or differently asymmetric compounds. May be given.
- 2,4,5-triarylimidazole dimer is preferable from the viewpoint of improving adhesion and sensitivity. These may be used alone or in combinations of two or more.
- the blending amount of the binder polymer is preferably 40 to 70 parts by weight with respect to 100 parts by weight of the total amount of the binder polymer and the photopolymerizable compound. .
- the blending amount is less than 40 parts by mass, the photocured product tends to be brittle, and when it exceeds 70 parts by mass, the resolution and the photosensitivity tend to decrease.
- the blending amount of the photopolymerizable compound is preferably 30 to 60 parts by mass, preferably 40 to 50 parts by mass with respect to 100 parts by mass of the total amount of the binder polymer and the photopolymerizable compound. More preferred. If the blending amount is less than 30 parts by mass, the resolution and photosensitivity tend to decrease, and if it exceeds 60 parts by mass, the photocured product tends to become brittle.
- the blending amount of the photopolymerization initiator is preferably 0.2;! To 20 parts by mass with respect to 100 parts by mass of the total amount of the binder polymer and the photopolymerizable compound. 0.2 to 10 parts by mass A force is preferable. If this blending amount is less than 0.1 parts by mass, the photosensitivity tends to decrease, and if it exceeds 20 parts by mass, the light absorption on the surface of the photosensitive resin composition increases during the exposure, and the internal content increases. There exists a tendency for photocurability to fall.
- the photosensitive resin composition includes a photopolymerizable compound (such as an oxetane compound) having at least one cationically polymerizable cyclic ether group in the molecule, a cationic polymerization initiator, a malachite.
- a photopolymerizable compound such as an oxetane compound having at least one cationically polymerizable cyclic ether group in the molecule
- a cationic polymerization initiator such as sodium oxetane compound
- Dyes such as green, photochromic agents such as tribromophenyl sulfone and leuco tar violet, thermochromic inhibitors, plasticizers such as p-toluenesulfonamide, pigments, fillers, antifoaming agents, flame retardants, stabilizers
- additives such as an adhesion-imparting agent, a leveling agent, a peeling accelerator, an antioxidant, a fragrance, an imaging agent, and a thermal crosslinking agent may be contained. These may be used alone or in combinations of two or more. These additives may be contained in an amount of about 0.0; 20 to 20 parts by mass with respect to 100 parts by mass of the total amount of the binder polymer and the photopolymerizable compound as long as the object of the present invention is not impaired.
- a binder polymer composed of other copolymerizable components may be used in combination.
- the binder polymer used in combination is the same as that used in conventional photosensitive resin compositions.
- acrylic resins, styrene resins, epoxy resins, amide resins, amide epoxy resins, alkyd resins, and phenol resins can be used.
- acrylic resins are preferred from the standpoint of alkali developability. These can be used alone or in combination of two or more.
- the photosensitive resin composition may be a solvent such as methanol, ethanol, acetone, methyl ethyl ketone, methyl cetyl sorb, ethyl cetyl sorb, toluene, N, N-dimethylformamide, and propylene glycol monomethyl ether as necessary.
- a solvent such as methanol, ethanol, acetone, methyl ethyl ketone, methyl cetyl sorb, ethyl cetyl sorb, toluene, N, N-dimethylformamide, and propylene glycol monomethyl ether as necessary.
- it can be dissolved in these mixed solvents to prepare a solution having a solid content of about 30 to 60% by mass.
- the photosensitive layer 20 in the photosensitive element 1 of the present invention can be formed by applying the above-described photosensitive resin composition on the support film 10 and removing the solvent.
- a coating method for example, a known method such as roll coating, comma coating, gravure coating, air knife coating, die coating, or bar coating can be employed.
- the solvent can be removed, for example, by treating at a temperature of 70 to 150 ° C for about 5 to 30 minutes.
- the amount of the remaining organic solvent in the photosensitive layer 20 is preferably 2% by mass or less from the viewpoint of preventing the diffusion of the organic solvent in the subsequent step.
- the thickness of the photosensitive layer 20 formed in this manner is preferably 1 to 100 Hm after drying. If the thickness is less than that, defects tend to occur when the photosensitive layer is laminated on the circuit forming substrate, and the production yield of the printed wiring board tends to decrease. On the other hand, if the thickness exceeds 100 ⁇ , the resolution of the photosensitive layer 20 decreases, and it tends to be difficult to produce a high-density printed wiring board.
- the photosensitive element 1 may include a protective film (not shown) on the main surface of the photosensitive layer 20 opposite to the main surface in contact with the support film 10.
- a protective film it is preferable to use a film in which the adhesive force between the photosensitive layer 20 and the protective film is smaller than the adhesive force between the photosensitive layer 20 and the support film 10. Further, it is preferable to use a low fisheye film as the protective film.
- the protective film include inert polyolefin films such as polyethylene and polypropylene. From the standpoint of peelability from the photosensitive layer 20, the protective film is preferably a polyethylene film. The thickness of the protective film varies depending on the application, but is 1 to 100m. Is preferred.
- the photosensitive element 1 further includes an intermediate layer or a protective layer such as a tacky layer, an adhesive layer, a light absorbing layer, and a gas barrier layer in addition to the support film 10, the photosensitive layer 20, and the protective film. Good.
- a protective layer such as a tacky layer, an adhesive layer, a light absorbing layer, and a gas barrier layer in addition to the support film 10, the photosensitive layer 20, and the protective film. Good.
- the photosensitive element 1 of the present embodiment may be stored, for example, as it is or in a state where a protective film further laminated on the photosensitive layer 20 is wound around a cylindrical core. .
- the support film 10 is wound into a roll shape so that it becomes a re-outer layer.
- a packing method it is preferable to wrap and package in a black sheet having low moisture permeability.
- Examples of the core material include plastics such as polyethylene resin, polypropylene resin, polystyrene resin, polychlorinated resin, and ABS resin (acrylonitrile-butadiene-styrene copolymer).
- the resist pattern forming method of the present embodiment includes a laminating step in which the photosensitive element 1 is laminated on the circuit forming substrate in the order of the photosensitive layer 20 and the support film 10, and actinic rays. Through which the photosensitive layer 20 is irradiated to a predetermined part to form a photocured portion on the photosensitive layer 20 and a developing step for removing the portion of the photosensitive layer 20 other than the photocured portion.
- the laminating step as a method of laminating the photosensitive layer 20 on the circuit forming substrate, when a protective film is present on the photosensitive layer 20, the protective film is removed and then the photosensitive layer is removed.
- a method of laminating by heating 20 to about 70 to 130 ° C. and press-bonding it to the circuit forming substrate with a pressure of about 0.;
- the surface on which the circuit forming substrate is laminated is usually a metal surface, but is not particularly limited.
- a pre-heat treatment of the circuit forming substrate may be performed.
- a negative or positive mask pattern is applied to the photosensitive layer 20 that has been laminated in the above lamination process.
- a photomask having a turn is aligned and adhered to the second main surface 14 of the support film 10.
- the exposure step is performed by irradiating the photosensitive layer 20 with an actinic ray in an image form through the support film 10 to form a photocured portion on the photosensitive layer 20.
- the light source of the actinic ray a known light source such as a carbon arc lamp, a mercury vapor arc lamp, a high-pressure mercury lamp, or a xenon lamp that emits ultraviolet rays or visible light effectively is used.
- a laser direct drawing exposure method can also be used.
- the photomask is peeled off from the support film 10. Further, the support film 10 is peeled off from the photosensitive layer 20.
- the unexposed part (unphotocured part) of the photosensitive layer 20 is removed and developed by wet development using a developer such as an alkaline aqueous solution, aqueous developer, organic solvent, or dry development, and a resist pattern is developed. Can be manufactured.
- alkaline aqueous solution examples include, for example, 0.;!
- the pH of the alkaline aqueous solution is preferably in the range of 9 to 11; the temperature is adjusted according to the developability of the photosensitive layer 20.
- a surfactant, an antifoaming agent, an organic solvent, or the like may be mixed.
- Examples of the development method include a dip method, a spray method, brushing, and slapping.
- the resist pattern may be further cured by performing exposure at about 10 j / cm 2 .
- the printed wiring board manufacturing method of the present embodiment is performed by etching or attaching the circuit forming substrate on which the resist pattern is formed by the resist pattern forming method.
- the etching or fitting of the circuit forming substrate is performed by etching or fitting the surface of the circuit forming substrate by a known method using the developed resist pattern as a mask.
- a cupric chloride solution for example, a cupric chloride solution, a ferric chloride solution, or an alkaline etching solution can be used.
- plating examples include copper plating, solder plating, nickel plating, and gold plating. It is done.
- the resist pattern can be peeled off with a stronger alkaline aqueous solution than the alkaline aqueous solution used for development, for example.
- a stronger alkaline aqueous solution examples include:! -10 mass parts sodium hydroxide aqueous solution;! -10 mass parts potassium hydroxide aqueous solution.
- the peeling method examples include an immersion method and a spray method.
- the printed wiring board on which the resist pattern is formed may have a small-diameter through hole that may be a multilayer printed wiring board.
- the support film 10 has a thickness of 1.0% or less. Is provided with a photosensitive element 1.
- a photosensitive element 1 As a result, when the photosensitive layer 20 is irradiated with actinic rays through the support film 10, a photocured portion can be formed in the photosensitive layer 20 with sufficiently excellent resolution and photosensitivity. Therefore, since the resolution of the obtained resist pattern and the circuit pattern on the printed wiring board is sufficiently excellent, it becomes possible to further increase the density of the circuit.
- the photosensitive element 1 includes the support film 10 having a surface resistivity of 10 13 ⁇ or less.
- the support film 10 having a surface resistivity of 10 13 ⁇ or less.
- the photomask is strongly attached to the support film 10.
- the event can also be sufficiently suppressed.
- alignment of the photomask and peeling and removal of the photomask from the support film 10 can be easily performed, so that workability is also improved.
- the production efficiency of the printed wiring board can be improved and the yield can be increased.
- a photosensitive element comprising a layer composed of a photosensitive resin composition containing a polymerizable compound and a photopolymerizer has excellent adhesion, resolution, resist shape after development, flexibility, and peelability after adhesion. It is possible to increase the density of the printed wiring board.
- Binder polymers (I) to (IV) containing the compounds shown in Table 1 as monomer units were synthesized by radical polymerization to obtain a 60 mass% toluene / methyl cellosolve (mass ratio 4/6) solution.
- the surface resistivity of the support film was measured according to JIS C 2151 under the following conditions.
- Measuring instrument Hewlett Packard 4329A high resistance meter
- Measuring electrode Main electrode inner diameter ⁇ 50mm, counter electrode inner diameter ⁇ 70mm, no guard electrode
- Example 1 A polyethylene terephthalate (hereinafter referred to as “PET”) film (manufactured by Toyobo Co., Ltd., trade name “A-1517”, thickness 16 111) was prepared as a support film. Next, the photosensitive resin composition containing the binder polymer (I) prepared above was applied onto the PET film so that the thickness was uniform, and dried for 2 minutes in a 100 ° C hot air convection dryer. Then, the solvent was removed to form a photosensitive layer. After drying, a photosensitive element was obtained by covering the photosensitive layer with a polyethylene film (trade name “NF-15” manufactured by Tamapoly Co., Ltd., thickness 20 am) as a protective film. The photosensitive layer after drying had a thickness of 25 m.
- PET polyethylene terephthalate
- a photosensitive element was obtained in the same manner as in Example 1 except that the photosensitive resin composition containing the binder polymer (II) was used instead of the binder polymer (I).
- the thickness of the photosensitive layer after drying was 25 am.
- a photosensitive element was obtained in the same manner as in Example 1 except that the photosensitive resin composition containing the binder polymer (III) was used instead of the binder polymer (I).
- the thickness of the photosensitive layer after drying was 25 am.
- a photosensitive element was obtained in the same manner as in Example 1 except that the photosensitive resin composition containing the binder polymer (IV) was used instead of the binder polymer (I).
- the thickness of the photosensitive layer after drying was 25 am.
- a photosensitive element was used in the same manner as in Example 1 except that a PET film (manufactured by Teijin DuPont Films, trade name “HTF-01”, thickness 16 m) was used instead of the PET film “A-1517”. Got.
- the thickness of the photosensitive layer after drying was 25 Hm.
- a photosensitive element was used in the same manner as in Example 1 except that a PET film (manufactured by Teijin DuPont Films, trade name “G2-16”, thickness 16 m) was used instead of the PET film “A-1517”. Got.
- the thickness of the photosensitive layer after drying was 25 Hm.
- a laminate was obtained in which the copper clad laminate, the photosensitive layer, and the support film were laminated in this order.
- Lamination was performed using a 120 ° C. heat roll at a pressure of 0.4 MPa and a roll speed of 1.5 m / min. These laminates were used as test pieces in the following tests.
- the PET film was peeled from the above test piece, and the minimum time (minimum development time, unit: second) that the photosensitive layer in the unexposed area could be completely removed was evaluated using a 1 mass% sodium carbonate aqueous solution at 30 ° C. .
- the results are shown in Table 3.
- a photo tool of the type is in close contact with the support film of the test piece, and a stair 21 steps step using an exposure machine with a high-pressure mercury lamp. Exposure was carried out with an irradiation energy amount such that the number of steps remaining after development of the tablet was 8.0. Next, the support film was peeled off, and a 1 mass% sodium carbonate aqueous solution at 30 ° C. was sprayed for twice the minimum image time to develop the unexposed portion.
- the resolution was evaluated based on the smallest value (unit: m) of the space width between the line widths in which the unexposed portion could be removed cleanly by the development process.
- the results are shown in Table 3.
- the smaller the numerical value the better the value.
- a photo tool with a stove 21-step tablet and glass chrome with a wiring pattern with a line width / space width of 2/1000 to 30/1000 (unit: m) as a negative for adhesion evaluation A photo tool of the type is brought into close contact with the support film of the test piece, and the number of remaining steps after development of the stove 21-step tablet is 8.0 with an exposure machine having a high-pressure mercury lamp lamp. The exposure was performed with the irradiation energy amount as follows. Next, the support film was peeled off, and a 1 mass% sodium carbonate aqueous solution at 30 ° C. was sprayed for twice the minimum development time, and development was carried out by removing unexposed portions.
- the resolution was evaluated based on the smallest value (unit: m) at which the unexposed area could be removed cleanly by the development process.
- the results are shown in Table 3.
- the evaluation of adhesiveness is a favorable value, so that a numerical value is small.
- test specimen after development was immersed in an aqueous solution mixed with 10% by volume Cuburapro S2 (manufactured by Atotech Japan Co., Ltd.) and 6% by volume sulfuric acid for 6 minutes at a temperature of 40 ° C, and then watered for 3 minutes with running water. After washing, it was immersed in a 10% by volume sulfuric acid aqueous solution for 30 seconds. Thereafter, using the copper sulfate plating solution shown below, plating was performed until the current density was 1.2 A / dm 2 and the plating thickness was 0.8 times the resist film thickness.
- Cuburapro S2 manufactured by Atotech Japan Co., Ltd.
- the composition of the copper sulfate plating solution is: copper sulfate pentahydrate 60g / L, 98% sulfuric acid 98mL / L, sodium chloride hydrate 100mg / L, basic leveler Ichiroku Paraside HL (manufactured by Atotech Jan.) and gloss The agent Kabaraside Universal (Atotech Japan Co., Ltd.) 3mL / L. Subsequently, the test piece after plating was washed with running water for 1 minute, sprayed with a 3 mass% sodium hydroxide aqueous solution at 50 ° C for 3 minutes, and the resist was peeled off.
- the remaining peeling after plating is The evaluation was based on the smallest value (unit: m) of the line width where the resist could be removed without any problem. The results are shown in Table 2. In addition, the peelability after plating is as good as the numerical value is small.
- the side shape of the copper plating line (resist side shape) in the peel test after the above-mentioned plating is observed with a scanning electron microscope (SEM), and evaluated in three stages of A, B, and C according to the following evaluation criteria. did.
- SEM scanning electron microscope
- the results are shown in Table 3.
- that the side shape of the copper plating line is good means that the side shape of the resist pattern is good.
- B A side shape with a smoothness between A and C.
- the polyimide substrate on which copper is deposited is acid washed with a 1% by volume hydrochloric acid aqueous solution.
- the photosensitivity obtained in Examples 1 and 2 and Comparative Examples 1 to 4 was the same as the production of the laminate, except that the polyimide base material obtained by drying with an air flow was used after washing with water.
- Each laminate was obtained by laminating the conductive element on the polyimide substrate. Using this laminate, exposure and development were performed in the same procedure as in the above resolution test to form a resist pattern.
- the cross-sectional shape of the resist pattern was observed with a focused ion beam processing apparatus (FIB) and a scanning electron microscope (SEM), and the tailing amount (unit: ⁇ m) of the resist pattern was obtained.
- the results are shown in Table 3.
- the tailing amount is better as the numerical value is smaller.
- the flexibility of the resist was evaluated using a test piece in which the same laminate as that used for the evaluation of the resist skirting was used and a resist pattern was formed in the same procedure.
- This test piece was cut to a width of 2 cm, hung on a mandrel, bent at about 180 degrees, and the substrate was reciprocated five times, and the minimum mandrel diameter (unit: mm) at which the resist was not peeled was determined.
- the results are shown in Table 3. The smaller the mandrel diameter, the better the flexibility of the resist.
- the laminate was wound into a roll shape with the support film on the outside. Subsequently, the laminated body wound up in a roll shape was pulled out from the end portion. Then, the amount of static electricity generated in the support film immediately after being pulled out was measured using a static electricity meter (trade name “FMX-002” manufactured by Simco Japan). The static electricity generation amount of the support film was measured on the main surface that was in contact with the protective film in the wound state. The amount of electrostatic generation was measured as a charged potential (unit: kV). The results are shown in Table 3.
- the photosensitive elements obtained in the examples are excellent in adhesion, resolution, peelability after plating, copper-plated line side shape (resist side shape), and flexibility. It turns out that the amount of static electricity generation is small!
- the present invention it is possible to sufficiently reduce the adhesion of foreign matters to the support film and the sticking of the photomask, and to form a resist pattern with sufficiently excellent resolution and high sensitivity. It is possible to provide a photosensitive element that is sufficiently excellent in resist shape after development, flexibility, and peelability after adhesion.
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Abstract
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KR1020097010099A KR101132057B1 (ko) | 2006-12-19 | 2007-12-07 | 감광성 엘리먼트 |
JP2008550105A JPWO2008075575A1 (ja) | 2006-12-19 | 2007-12-07 | 感光性エレメント |
CN2007800466705A CN101563651B (zh) | 2006-12-19 | 2007-12-07 | 感光性元件 |
EP07850280A EP2096493A4 (en) | 2006-12-19 | 2007-12-07 | PHOTOSENSITIVE ELEMENT |
US12/519,459 US20100028808A1 (en) | 2006-12-19 | 2007-12-07 | Photosensitive element |
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US (1) | US20100028808A1 (ja) |
EP (1) | EP2096493A4 (ja) |
JP (1) | JPWO2008075575A1 (ja) |
KR (1) | KR101132057B1 (ja) |
CN (3) | CN101563651B (ja) |
TW (1) | TWI427411B (ja) |
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Cited By (2)
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WO2016163540A1 (ja) * | 2015-04-08 | 2016-10-13 | 旭化成株式会社 | 感光性樹脂組成物 |
JP2017191171A (ja) * | 2016-04-12 | 2017-10-19 | 日立化成株式会社 | 感光性樹脂組成物、感光性エレメント、レジストパターンの形成方法及びプリント配線板の製造方法 |
Families Citing this family (5)
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US8586284B2 (en) * | 2008-03-21 | 2013-11-19 | Hitachi Chemical Company, Ltd. | Photosensitive resin composition, photosensitive element, method of forming resist pattern, and process for producing printed wiring board |
CN107632498A (zh) * | 2017-09-20 | 2018-01-26 | 浙江福斯特新材料研究院有限公司 | 一种感光性树脂组合物及由其制成的层压体 |
KR102570709B1 (ko) * | 2017-11-06 | 2023-08-24 | 아사히 가세이 가부시키가이샤 | 감광성 수지 적층체 및 레지스트 패턴의 제조 방법 |
WO2022174211A1 (en) * | 2021-02-09 | 2022-08-18 | Dupont Electronics, Inc. | Photosensitive composition and photoresist dry film made |
CN114815508B (zh) * | 2022-06-30 | 2022-09-23 | 杭州福斯特应用材料股份有限公司 | 感光干膜抗蚀剂层压体和线路板 |
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- 2007-12-07 CN CN2012101720636A patent/CN102707571A/zh active Pending
- 2007-12-07 WO PCT/JP2007/073702 patent/WO2008075575A1/ja active Application Filing
- 2007-12-07 JP JP2008550105A patent/JPWO2008075575A1/ja active Pending
- 2007-12-07 CN CN201110327370.2A patent/CN102360163B/zh active Active
- 2007-12-07 US US12/519,459 patent/US20100028808A1/en not_active Abandoned
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TW200905387A (en) | 2009-02-01 |
CN102707571A (zh) | 2012-10-03 |
EP2096493A4 (en) | 2010-11-17 |
KR20090077826A (ko) | 2009-07-15 |
KR101132057B1 (ko) | 2012-04-02 |
CN102360163B (zh) | 2013-06-12 |
EP2096493A1 (en) | 2009-09-02 |
CN102360163A (zh) | 2012-02-22 |
JPWO2008075575A1 (ja) | 2010-04-08 |
CN101563651A (zh) | 2009-10-21 |
US20100028808A1 (en) | 2010-02-04 |
TWI427411B (zh) | 2014-02-21 |
CN101563651B (zh) | 2012-07-04 |
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