JP6446787B2 - Transparent resin composition for columnar formation - Google Patents

Description

  The present invention relates to a transparent resin composition for columnar products used for columnar products.

  In recent years, electronic devices constructed by stacking a plurality of substrates for electronic devices have been improved in functionality or have improved functionality by increasing the distance between substrates compared to conventional electronic devices. Things have been developed in various fields.

For example, in the field of display devices, liquid crystal lenses are being developed as the above-described electronic elements (Patent Documents 1 to 3). The liquid crystal lens is used for three-dimensional display in a display device, and more specifically, used for a naked-eye three-dimensional display method. The liquid crystal lens has a substrate having two electrodes and a liquid crystal layer formed between the two substrates, and changes the orientation of the liquid crystal in the liquid crystal layer by applying a voltage between the electrodes. The lens effect can be achieved. In the liquid crystal lens, in order to ensure the lens thickness, the distance (cell gap) between the two substrates is required to be within a range of 30 μm to 100 μm.
Also, in the field of semiconductors and printed circuit boards, in order to prevent damage to the semiconductor layer and conductive layer formed on the substrate, a configuration in which a plurality of substrates are arranged in an overlapping manner is used. It is necessary to provide a sufficient distance.

In the above-described electronic device, as a method for maintaining a predetermined distance between substrates, in a liquid crystal lens, for example, as shown in Patent Document 2 and Patent Document 3, a bead spacer or a columnar spacer is provided between substrates having two electrodes. Is being considered. However, when the bead spacer is used, it is difficult to dispose the bead spacer at a predetermined position in the liquid crystal lens, and there is a problem that it is difficult to perform good display. Further, there is a problem that it is difficult to form a columnar spacer having a height corresponding to the cell gap in the liquid crystal lens.
In addition, in the field of semiconductors and the field of printed circuit boards, columnar formed articles having a sufficient height have not been obtained.

  In addition, not only the above-mentioned columnar spacer used for the liquid crystal lens, but also a columnar formed product such as a columnar spacer for a liquid crystal display device is conventionally formed by a photolithography method using a transparent resin composition. As the transparent resin composition used in this case, one containing a photopolymerization initiator having an absorption peak on the shorter wavelength side is suitably used. The absorption peak of the photopolymerization initiator will be described later.

JP 2009-276624 A JP 2006-293241 A JP 2012-173517 A

  The height required for the columnar formation desired in the electronic device described above and the ratio of the height to the width of the lower base are the ratio of the height of the conventional columnar formation and the height of the lower base (hereinafter referred to as the height). , “The ratio of the height to the width of the lower base” is sometimes referred to as an aspect ratio). In addition, the columnar formed article in the electronic device is required to have a small absolute value of the difference between the width of the upper base and the width of the lower base from the viewpoint of strength.

  As a result of intensive studies in view of the above circumstances, the present inventors have heretofore been known to be unsuitable for the formation of columnar products, and contain a photopolymerization initiator having an absorption peak on the long wavelength side. By using a resin composition, it discovered that the columnar formation which has a favorable shape can be formed, and came to complete this invention.

  That is, the present invention relates to a transparent resin composition for columnar formations capable of forming a columnar formation having a good shape, a transparent resin composition for columnar formations for liquid crystal lenses, and a columnar formation using the same. The main object is to provide a method for manufacturing a substrate, a method for manufacturing a substrate with a columnar product for a liquid crystal lens, a substrate with a columnar product, and a substrate with a columnar product for a liquid crystal lens.

  In order to achieve the above object, the present invention provides a transparent column-shaped product used for forming the columnar product in a substrate with a columnar product having a substrate and a columnar product formed on the substrate. A resin composition comprising a monomer, a polymer, and a photopolymerization initiator, wherein the strongest absorption peak of the photopolymerization initiator is in the range of 310 nm to 380 nm. A transparent resin composition is provided.

  According to this invention, it can be set as the transparent resin composition for columnar formations which can form the columnar formation which has a favorable shape by containing the above-mentioned photoinitiator.

  In the above invention, the ratio of the mass of the monomer and the mass of the polymer contained in the transparent resin composition for columnar formation is within the range of monomer mass: polymer mass = 70: 30 to 90:10. It is preferable that This is because a columnar formed product having a good shape can be suitably formed.

  The present invention provides a columnar formation for a liquid crystal lens having a substrate and a columnar formation for a liquid crystal lens that is formed on the substrate and is used when the substrate and the liquid crystal lens are used to maintain a constant distance between the opposing substrates. A transparent resin composition for a liquid crystal lens columnar formation used for forming the liquid crystal lens columnar formation on a substrate, comprising a monomer, a polymer, and a photopolymerization initiator, wherein the photopolymerization Provided is a transparent resin composition for a columnar formed article for a liquid crystal lens, wherein the strongest absorption peak of the initiator is in the range of 310 nm to 380 nm.

  According to this invention, it is set as the transparent resin composition for columnar formations for liquid crystal lenses which can form the columnar formation for liquid crystal lenses which has a favorable shape by containing the above-mentioned photoinitiator. Can do.

  The present invention provides a columnar formation having a coating step of coating a transparent resin composition on a substrate to form a coating film, and an exposure development step of forming a columnar formation by developing after exposing the coating film. A method for producing an article-attached substrate, wherein the transparent resin composition contains a monomer, a polymer, and a photopolymerization initiator, and the strongest absorption peak of the photopolymerization initiator is within a range of 310 nm to 380 nm. There is provided a method of manufacturing a substrate with a columnar product,

  According to the present invention, by using the above-described transparent resin composition, it is possible to produce a substrate with a columnar product having a columnar product having a good shape.

  The present invention includes a coating step of coating a transparent resin composition on a substrate to form a coating film, and a counter substrate used when the coating film is exposed and then developed to form the substrate and a liquid crystal lens. A method for producing a substrate with a columnar product for liquid crystal lenses, wherein the transparent resin composition comprises a monomer, a polymer, And a photopolymerization initiator, wherein the photopolymerization initiator has a strongest absorption peak in the range of 310 nm to 380 nm.

  According to the present invention, by using the transparent resin composition described above, it is possible to manufacture a substrate with a columnar product for liquid crystal lenses having a columnar product for liquid crystal lenses having a good shape.

  The present invention is a substrate with a columnar product having a substrate and a columnar product formed on the substrate and containing a transparent resin, the height of the columnar product is in the range of 30 μm to 100 μm, The absolute value of the difference between the width of the upper base and the width of the lower base is 5.0 μm or less, and the ratio of the height to the width of the lower base is within a range of 1.7 to 2.3. A substrate with a columnar product is provided.

  According to the present invention, the height of the columnar formation is higher, the absolute value of the difference between the width of the upper base and the width of the lower base is small, and the ratio of the height to the width of the lower base is large. It can be set as the board | substrate with a columnar formation which has a formation.

  The present invention provides a liquid crystal having a substrate and a columnar formation for a liquid crystal lens, which is formed on the substrate and contains a transparent resin, and maintains a constant distance between the substrate and a counter substrate used as a liquid crystal lens. A substrate with a lens columnar product, wherein the height of the liquid crystal lens columnar product is in the range of 30 μm to 100 μm, and the absolute value of the difference between the width of the upper base and the width of the lower base is 5.0 μm or less. And the ratio of the height to the width of the lower base is in the range of 1.7 to 2.3.

  According to the present invention, by having the above-mentioned columnar formation for a liquid crystal lens, the cell gap can be maintained well when the liquid crystal lens is formed, and the liquid crystal lens columnar formation for a liquid crystal lens having good strength and can do.

  The transparent resin composition for a columnar product of the present invention has the effect of being able to form a columnar product having a good shape.

It is a schematic sectional drawing which shows an example of the board | substrate with a columnar formation of this invention. It is a schematic sectional drawing which shows the other example of the board | substrate with a columnar formation of this invention. It is a schematic sectional drawing which shows an example of the liquid crystal lens using the board | substrate with a columnar formation for liquid crystal lenses of this invention. It is process drawing which shows an example of the manufacturing method of the board | substrate with a columnar formation for liquid crystal lenses of this invention. It is explanatory drawing for demonstrating the shape of the columnar formation for liquid crystal lenses in this invention. It is a schematic sectional drawing which shows the other example of the board | substrate with a columnar formation of this invention.

  Hereinafter, transparent resin composition for columnar formation, transparent resin composition for columnar formation for liquid crystal lens, method for manufacturing substrate with columnar formation, method for manufacturing substrate with columnar formation for liquid crystal lens, substrate with columnar formation, A substrate with a columnar product for liquid crystal lenses will be described.

A. Transparent resin composition for columnar formed product The transparent resin composition for columnar formed product of the present invention (hereinafter sometimes simply referred to as a transparent resin composition) is a substrate and a columnar shape formed on the substrate. A columnar product-attached substrate having a product is used to form the columnar product, and includes a monomer, a polymer, and a photopolymerization initiator, and is the strongest of the photopolymerization initiators. The absorption peak is in the range of 310 nm to 380 nm.

The “strongest absorption peak of the photopolymerization initiator” refers to the strongest peak among the wavelength peaks absorbed by the photopolymerization initiator. More specifically, in the present invention, when there are a plurality of wavelength peaks absorbed by the photopolymerization initiator, the strongest peak is defined as “the strongest absorption peak of the photopolymerization initiator”. In addition, in the photopolymerization initiator, usually, the strongest absorption peak wavelength described above is irradiated to cause a radical reaction of a photoradical reaction.
The absorption peak of the photopolymerization initiator can be obtained by dissolving the photopolymerization initiator in a solvent and measuring the absorption spectrum using a spectrophotometer such as Hitachi spectrophotometer U-3900.

  In this specification, the photopolymerization initiator having the strongest absorption peak of the photopolymerization initiator in the range of 310 nm to 380 nm is referred to as “photopolymerization initiator having an absorption peak on the long wavelength side”, and the photopolymerization A photopolymerization initiator in which the strongest absorption peak of the initiator is less than the above range will be referred to as “a photopolymerization initiator having an absorption peak on the short wavelength side”.

Here, the columnar article-formed substrate formed using the transparent resin composition of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic sectional view showing an example of a substrate with a columnar product formed using the transparent resin composition of the present invention, and FIG. 2 is a columnar product formed using the transparent resin composition of the present invention. It is a schematic sectional drawing which shows the other example of an attached board | substrate. 1 and FIG. 2 show an example in which the substrate with columnar formations is a substrate with columnar formations for liquid crystal lenses. As shown in FIGS. 1 and 2, the substrate 1 with a columnar product for liquid crystal lenses includes a substrate 2 and a columnar product 3 for liquid crystal lenses formed on the substrate 2. Further, in the substrate 1 with columnar formation for liquid crystal lenses, the transparent electrode layer 4 is usually formed on the substrate 2, and the columnar formation 3 for liquid crystal lenses is formed on the transparent electrode layer 4. FIG. 1 shows an example in which the transparent electrode layer 4 is continuously formed on the substrate 2, and FIG. 2 shows an example in which the transparent electrode layer 4 is formed in a pattern on the substrate 2. Show.

  FIG. 3 is a schematic sectional view showing an example of a liquid crystal lens. As shown in FIG. 3, in the liquid crystal lens 30, the liquid crystal lens columnar substrate 1, the counter substrate 12, the liquid crystal lens columnar substrate 1, and the liquid crystal layer formed between the counter substrate 12. 20. The counter substrate 12 usually has a transparent electrode layer 14 formed on the counter substrate 12. In the liquid crystal lens 30, the liquid crystal lens columnar product-attached substrate 1 is usually disposed so that the surface on the liquid crystal lens columnar product 3 side faces the surface of the counter substrate 12 on which the transparent electrode layer 14 is formed. Is done. In addition, the transparent electrode layer 4 formed on the liquid crystal lens columnar substrate 1 and the transparent electrode layer 14 formed on the counter substrate 12 are usually formed continuously one after the other. The other is a long transparent electrode layer arranged in a stripe shape. In addition, the liquid crystal lens 30 usually has a sealing material 31 for sealing the liquid crystal layer 20.

  According to this invention, it can be set as the transparent resin composition for columnar formations which can form the columnar formation which has a favorable shape by containing the above-mentioned photoinitiator.

More specifically, according to the present invention, the deep part curability of the transparent resin composition can be improved by containing the above-described photopolymerization initiator.
Here, in the columnar formation used in the above-described electronic device, the formation area is about the same as that of the conventional columnar formation, but the height is required to be higher than that of the conventional columnar formation. The Therefore, when forming a columnar product having a high height on the substrate by photolithography, a coating film of the transparent resin composition is formed on the substrate with a thickness corresponding to the height of the columnar product. In the present invention, since the deep part curability of the transparent resin composition can be made favorable, at the time of exposure of the coating film of the transparent resin composition, not only in the coating film surface but also in the thickness direction of the coating film In particular, the photopolymerization reaction can proceed well even in the vicinity of the substrate. Therefore, it is possible to obtain a columnar formed article having a good height, the absolute value of the difference between the width of the upper base and the width of the lower base, and the aspect ratio.

A transparent resin composition using a photopolymerization initiator having an absorption peak on the short wavelength side, that is, a transparent resin composition used for a conventional columnar formation (hereinafter referred to as a conventional transparent resin composition). In some cases, the reason why it is difficult to form a columnar formed product having a good shape is considered as follows.
When a coating film of a conventional transparent resin composition is formed on a substrate with a thickness corresponding to the height of the columnar formed product and exposed to light, the photopolymerization reaction can proceed well on the coating film surface. However, it is considered that the photopolymerization reaction cannot sufficiently proceed in the thickness direction of the coating film. Therefore, at the time of development, the development in the vicinity of the substrate proceeds compared to the surface of the coating film, and the width of the lower base becomes too small compared to the width of the upper base in the columnar formed product, or the coating film itself is removed from the substrate. In some cases, it may be difficult to form a columnar product having a good shape.

In the case of forming a resin layer in a pattern by photolithography, it is already known that deep part curability can be exhibited highly when light having a longer wavelength is used as exposure light. In conventional conventional columnar products such as columnar spacers in an apparatus, a photopolymerization initiator having an absorption peak on the long wavelength side is considered unsuitable for the following reasons.
That is, in the conventional columnar formation, the height required for the columnar formation in the present invention is not assumed. Moreover, as a conventional columnar formation, for example, a columnar spacer of a liquid crystal display device having a height of about several μm is preferably used. Therefore, it is considered that the shape of the conventional columnar formed product is largely influenced by the curability of the coating film surface during exposure. Therefore, as the exposure light, light on the short wavelength side exhibiting high surface curability is suitably used, and a photopolymerization initiator having an absorption peak on the short wavelength side is suitably used.

The present invention can use a photopolymerization initiator having an absorption peak on the long wavelength side, which is conventionally considered unsuitable as a photopolymerization initiator used for forming a columnar product, to form a columnar product. It has the feature in the point which discovered.
Hereinafter, the details of the transparent resin composition of the present invention will be described.

1. Photopolymerization initiator The photopolymerization initiator used in the present invention has a strongest absorption peak in the range of 310 nm to 380 nm.
The strongest absorption peak of the photopolymerization initiator is not particularly limited as long as it is within the above-mentioned range, but is particularly preferably within the range of 315 nm to 375 nm, and particularly preferably within the range of 320 nm to 370 nm. .
This is because if the strongest absorption peak is small, it may be difficult to improve the shape of the columnar formed product. Moreover, if the strongest absorption peak is large, the polymerization reaction does not proceed sufficiently, and it may be difficult to form the columnar product itself using the transparent resin composition of the present invention.

  The photopolymerization initiator used in the present invention is, for example, a compound that generates free radicals by the energy of ultraviolet rays, and is an oxime ester compound, an acetophenone compound, a benzophenone compound, a biimidazole compound, or a benzoin compound. , Α-diketone compounds, polynuclear quinone compounds, xanthone compounds, thioxanthone compounds, triazine compounds, ketal compounds, azo compounds, peroxides, 2,3-dialkyldione compounds, disulfide compounds, thiuram Examples thereof include compounds and fluoroamine compounds. These can be used alone or in combination.

  Specific examples of the photopolymerization initiator include benzophenone, Michler's ketone (4,4′-bisdimethylaminobenzophenone), 4,4′-bisdiethylaminobenzophenone, 4-methoxy-4′-dimethylaminobenzophenone, and 2-ethylanthraquinone. , Aromatic ketones such as phenanthrene, benzoin ethers such as benzoin methyl ether, benzoin ethyl ether and benzoin phenyl ether, benzoin such as methyl benzoin and ethyl benzoin, 2- (o-chlorophenyl) -4,5-phenylimidazole 2- (o-chlorophenyl) -4,5-di (m-methoxyphenyl) imidazole dimer, 2- (o-fluorophenyl) -4,5-diphenylimidazole dimer, 2- (o- Methoxyphenyl) -4, -Diphenylimidazole dimer, 2,4,5-triarylimidazole dimer, 2- (o-chlorophenyl) -4,5-di (m-methylphenyl) imidazole dimer, 2-benzyl-2- Dimethylamino-1- (4-morpholinophenyl) -butanone, 2-trichloromethyl-5-styryl-1,3,4-oxadiazole, 2-trichloromethyl-5- (p-cyanostyryl) -1, Halomethylthiazole compounds such as 3,4-oxadiazole, 2-trichloromethyl-5- (p-methoxystyryl) -1,3,4-oxadiazole, 2,4-bis (trichloromethyl) -6- p-methoxystyryl-S-triazine, 2,4-bis (trichloromethyl) -6- (1-p-dimethylaminophenyl-1,3-butadienyl)- -Triazine, 2-trichloromethyl-4-amino-6-p-methoxystyryl-S-triazine, 2- (naphth-1-yl) -4,6-bis-trichloromethyl-S-triazine, 2- (4 -Ethoxy-naphth-1-yl) -4,6-bis-trichloromethyl-S-triazine, 2- (4-butoxy-naphth-1-yl) -4,6-bis-trichloromethyl-S-triazine, etc. Halomethyl-S-triazine compounds, 2,2-dimethoxy-1,2-diphenylethane-1-one, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropanone, 1,2 -Benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1,1-hydroxy-cyclohexyl-phenyl ketone, benzyl, benzoyl Benzoic acid, methyl benzoylbenzoate, 4-benzoyl-4′-methyldiphenyl sulfide, benzylmethyl ketal, dimethylaminobenzoate, isoamyl P-dimethylaminobenzoate, 2-n-butoxyethyl-4-dimethylaminobenzoate, 2- Examples include photopolymerization initiators such as chlorothioxanthone, 2,4 diethylthioxanthone, 2,4 dimethylthioxanthone, and isopropylthioxanthone.

  As a brand name of a photoinitiator, Irgacure 369 (made by Ciba Specialty Chemicals), Irgacure OXE02 (made by Ciba Specialty Chemicals), NCI831 (made by Adeka) etc. are mentioned. In this invention, these photoinitiators can be used individually or in mixture of 2 or more types.

The content of the photopolymerization initiator is not particularly limited as long as a columnar formed product can be formed, but specifically, 0.5% by mass to 5.0% by mass with respect to the solid component of the transparent resin composition. %, In particular, 1.0% to 4.0% by weight, particularly 1.5% to 3.0% by weight.
If the amount of the photopolymerization initiator is too small, the coating may be insufficiently cured, and if the amount of the photopolymerization initiator is too large, the sensitivity near the surface of the coating will increase, resulting in a columnar formation larger than the predetermined size. This is because there is a possibility of becoming.
In addition, in this invention, the "solid component of a transparent resin composition" means the component of the transparent resin composition except the solvent, when the transparent resin composition contains the solvent mentioned later.

2. Monomer Examples of the monomer used in the present invention include allyl acrylate, benzyl acrylate, butoxyethyl acrylate, butoxyethylene glycol acrylate, cyclohexyl acrylate, dicyclopentanyl acrylate, 2-ethylhexyl acrylate, glycerol acrylate, glycidyl acrylate, 2-hydroxy Ethyl acrylate, 2-hydroxypropyl acrylate, isobornyl acrylate, isodexyl acrylate, isooctyl acrylate, lauryl acrylate, 2-methoxyethyl acrylate, methoxyethylene glycol acrylate, phenoxyethyl acrylate, stearyl acrylate, ethylene glycol diacrylate, diethylene glycol Diacrylate, 1,4-butanediol diacrylate, 1,5-pentanediol diacrylate, 1,6-hexanediol diacrylate, 1,3-propanediol acrylate, 1,4-cyclohexanediol diacrylate, 2,2-dimethylol Propanediacrylate, glycerol diacrylate, tripropylene glycol diacrylate, glycerol triacrylate, trimethylolpropane triacrylate, polyoxyethylated trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, triethylene glycol diacrylate, Polyoxypropyltrimethylolpropane triacrylate, butylene glycol diacrylate, 1,2,4-buta Triol triacrylate, 2,2,4-trimethyl-1,3-pentanediol diacrylate, diallyl fumarate, 1,10-decanediol dimethyl acrylate, dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate, and the above Acrylate group substituted with methacrylate group, γ-methacryloxypropyltrimethoxysilane, 1-vinyl-2-pyrrolidone, 2-hydroxyethylacryloyl phosphate, tetrahydrofurfuryl acrylate, dicyclopentenyl acrylate, dicyclopentenyloxyethyl Acrylate, 3-butanediol diacrylate, neopentyl glycol diacrylate, polyethylene glycol diacrylate, hydroxypivalin Acid ester neopentyl glycol diacrylate, phenol-ethylene oxide modified acrylate, phenol-propylene oxide modified acrylate, N-vinyl-2-pyrrolidone, bisphenol A-ethylene oxide modified diacrylate, pentaerythritol diacrylate monostearate, tetraethylene glycol Diacrylate, polypropylene glycol diacrylate, trimethylolpropane propylene oxide modified triacrylate, isocyanuric acid ethylene oxide modified triacrylate, trimethylolpropane ethylene oxide modified triacrylate, pentaerythritol pentaacrylate, pentaerythritol hexaacrylate, pentaerythritol tetraacrylate A Relate monomers, those obtained by substituting these acrylate groups with methacrylate groups, urethane acrylate oligomers in which acrylate groups are bonded to oligomers having a polyurethane structure, polyester acrylate oligomers in which acrylate groups are bonded to oligomers having a polyester structure, epoxy An epoxy acrylate oligomer in which an acrylate group is bonded to an oligomer having a group, a urethane methacrylate oligomer in which a methacrylate group is bonded to an oligomer having a polyurethane structure, a polyester methacrylate oligomer in which a methacrylate group is bonded to an oligomer having a polyester structure, an epoxy group Acrylates, epoxy methacrylate oligomers with methacrylate groups bonded to oligomers Polyurethane acrylates having group, polyester acrylates having an acrylate group, an epoxy acrylate resin having an acrylate group, a polyurethane methacrylate having a methacrylate group, an epoxy methacrylate resins having a polyester methacrylate, and methacrylate groups having methacrylate group. These monomers may be used alone or in combination of two or more. In the present invention, commercially available monomers can also be used. For example, SR399 (manufactured by Sartomer Co., Ltd.), Aronix M-400 (manufactured by Toagosei Co., Ltd.), and Aronix M-450 (manufactured by Toagosei Co., Ltd.) ) Is preferred.

  The content of the monomer is not particularly limited as long as a columnar formed product can be formed. Specifically, the content of the monomer is in the range of 60% by mass to 95% by mass with respect to the solid component of the transparent resin composition. It is preferable to be in the range of 65% by mass to 93% by mass, particularly in the range of 70% by mass to 90% by mass.

3. Polymer Examples of the polymer used in the present invention include ethylene-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, ethylene vinyl copolymer, polystyrene, acrylonitrile-styrene copolymer, ABS resin, and polymethacrylic acid resin. , Ethylene methacrylate resin, polyvinyl chloride resin, chlorinated vinyl chloride, polyvinyl alcohol, cellulose acetate propionate, cellulose acetate butyrate, nylon 6, nylon 66, nylon 12, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyvinyl acetal , Polyether ether ketone, polyether sulfone, polyphenylene sulfide, polyarylate, polyvinyl butyral, epoxy resin, phenoxy resin, polyimid Resins, polyamideimide resins, polyamic acid resins, polyetherimide resins, phenol resins, urea resins, and the like, and polymerizable monomers such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n- Propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, sec-butyl acrylate, sec-butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, n-pentyl acrylate, n-pentyl methacrylate, n-hexyl acrylate, n-hexyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate N-octyl acrylate, n-octyl methacrylate, n-decyl acrylate, n-decyl methacrylate, 2-hydroxyethyl methacrylate, benzyl methacrylate, styrene, α-methylstyrene, N-vinyl-2-pyrrolidone, glycidyl (meth) A polymer comprising one or more of acrylate and one or more of acrylic acid, methacrylic acid, dimer of acrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, vinyl acetic acid, and acid anhydrides thereof, or A copolymer etc. are mentioned. These polymers may be used alone or in combination of two or more. In the present invention, commercially available polymers can also be used. For example, Epicoat 180S70 (manufactured by Yuka Shell Epoxy Co., Ltd.), Aronix M-5600 (manufactured by Toagosei Co., Ltd.), Aronix M-6200 (Toagosei Co., Ltd.) Alonix M-7100 (manufactured by Toagosei Co., Ltd.) and Aronix M-9050 (manufactured by Toagosei Co., Ltd.) are preferred.

  The content of the polymer is not particularly limited as long as a columnar formed product can be formed. Specifically, the polymer content is in the range of 5% by mass to 40% by mass with respect to the solid component of the transparent resin composition, among others. It is preferable to be in the range of 7% by mass to 35% by mass, particularly in the range of 10% by mass to 30% by mass.

4). Solvent The transparent resin composition of the present invention usually further contains a solvent. The solvent can be the same as that used in general resin compositions, specifically, alcohols such as methanol, ethanol, n-propanol, isopropanol, ethylene glycol, propylene glycol, α- or Terpenes such as β-terpineol, acetone, methyl ethyl ketone, cyclohexanone, ketones such as N-methyl-2-pyrrolidone, aromatic hydrocarbons such as toluene, xylene, tetramethylbenzene, cellosolve, methyl cellosolve, ethyl cellosolve, Carbitol, methyl carbitol, ethyl carbitol, butyl carbitol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol Glycol ethers such as no ethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, ethyl acetate, butyl acetate, cellosolve acetate, ethyl cellosolve acetate, butyl cellosolve acetate, carbitol acetate, ethyl carbitol acetate, butyl carbitol Examples thereof include acetates such as acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, and 3-methoxybutyl acetate.

5. Additives The transparent resin composition of the present invention can be added by appropriately selecting necessary additives in addition to the above-described photopolymerization initiator, monomer, polymer, and solvent.
Examples of the additive include a leveling agent, a crosslinking agent, a curing agent, a polymerization accelerator, and a viscosity modifier. Known additives can be used for these additives.

6). Transparent resin composition The ratio of the mass of the monomer and the mass of the polymer contained in the transparent resin composition of the present invention is not particularly limited as long as a desired columnar formed product can be formed, but the mass of the monomer: The mass of the polymer is preferably in the range of 70:30 to 90:10, more preferably in the range of 73:27 to 87:13, and particularly preferably in the range of 75:25 to 85:15.
This is because if the mass ratio of the monomer is too small or too large than the above ratio, it may be difficult to form the columnar product itself.

About solid content concentration and viscosity of a transparent resin composition, it can select suitably according to the coating method of the transparent resin composition to a board | substrate at the time of forming a columnar formation.
In addition, "solid content concentration of a transparent resin composition" means the ratio of the mass of the solid component with respect to the mass of the transparent resin composition containing a solvent, when a transparent resin composition contains the above-mentioned solvent.

7). Others The transparent resin composition of the present invention is used to form a columnar product in a substrate with a columnar product.
The columnar product can be appropriately selected according to various electronic elements. For example, a columnar product for a liquid crystal lens for holding a cell gap when a liquid crystal lens is used, or a substrate when a printer wiring board is used. A member for maintaining a constant distance between them, a member for maintaining a constant distance between the substrates in a semiconductor laminated substrate, a member for forming a micro-channel in an inkjet printer, and a plasma display And a cathode separator when an organic electroluminescence element is used.
As the columnar formation, a columnar formation for a liquid crystal lens is particularly preferable.
The details of the substrate with columnar formation will be described in the section “E. Substrate with columnar formation” described later.

B. Transparent resin composition for columnar formation for liquid crystal lens The transparent resin composition for columnar formation for liquid crystal lens of the present invention (hereinafter sometimes referred to as a transparent resin composition for liquid crystal lens) includes a substrate and the above A liquid crystal lens columnar substrate having a columnar formation for a liquid crystal lens, which is formed on the substrate and that holds the substrate and the opposite substrate used when the liquid crystal lens is used at a fixed distance, the liquid crystal lens columnar substrate. A transparent resin composition for a columnar formed article for a liquid crystal lens used for forming a formed article, which contains a monomer, a polymer, and a photopolymerization initiator, and has the strongest absorption peak of the photopolymerization initiator. It is in the range of 310 nm to 380 nm.

  According to this invention, it is set as the transparent resin composition for columnar formations for liquid crystal lenses which can form the columnar formation for liquid crystal lenses which has a favorable shape by containing the above-mentioned photoinitiator. Can do.

  The details of the transparent resin composition for a liquid crystal lens of the present invention can be the same as the contents described in the above-mentioned section “A. Transparent resin composition for columnar formed article”, and thus the description thereof is omitted here. To do.

C. Manufacturing method of substrate with columnar formation The manufacturing method of a substrate with columnar formation according to the present invention includes a coating step of applying a transparent resin composition on a substrate to form a coating film, and developing after exposing the coating film. And a step of exposing and developing to form a columnar product, wherein the transparent resin composition contains a monomer, a polymer, and a photopolymerization initiator, and is the most of the photopolymerization initiator. A strong absorption peak is in the range of 310 nm to 380 nm.

  The manufacturing method of the board | substrate with a columnar formation of this invention is demonstrated using figures. 4 (a) to 4 (d) are process diagrams showing an example of a method for manufacturing a substrate with a columnar product according to the present invention. 4A to 4D show an example in which the substrate with columnar formation is a substrate with columnar formation for a liquid crystal lens. In the method for manufacturing a substrate with a columnar product for liquid crystal lenses of the present invention, first, a substrate 2 is prepared as shown in FIG. A transparent electrode layer 4 may be formed on the substrate 2 in advance. Next, as shown in FIG. 4B, the transparent resin composition for a liquid crystal lens described in the section “B. Transparent resin composition for columnar formation for liquid crystal lens” described above is applied on the transparent electrode layer 4. To form a coating film 3 '(application process). Next, as shown in FIG. 4C, the coating film 3 ′ is exposed by irradiating the exposure light L through the photomask M. Next, by developing the coating film 3 ′, a columnar formed product 3 for a liquid crystal lens is formed as shown in FIG. 4D (exposure development process). Through the above steps, the liquid crystal lens columnar substrate 1 can be manufactured.

  According to the present invention, by using the above-described transparent resin composition, it is possible to produce a substrate with a columnar product having a columnar product having a good shape.

  Hereinafter, each process of the manufacturing method of the board | substrate with a columnar formation of this invention is demonstrated.

1. Application Step The application step used in the present invention is a step of forming a coating film by applying a transparent resin composition on a substrate.

  About the transparent resin composition used for this process, since it is the same as the content demonstrated in the term of the "A. transparent resin composition for columnar formations" mentioned above, description here is abbreviate | omitted.

  As a board | substrate used for this invention, it can select suitably according to the use of an electronic element, and it does not specifically limit. Moreover, as said board | substrate, it may have transparency and does not need to have transparency.

  When the said board | substrate has transparency, it does not specifically limit about the transparency of a board | substrate, For example, it is preferable that a total light transmittance is 80% or more, and it is more preferable that it is 90% or more. Here, the total light transmittance of the substrate can be measured according to JIS K7361-1 (a test method for the total light transmittance of a plastic-transparent material).

  As the substrate, for example, an inflexible rigid material such as quartz glass, Pyrex (registered trademark) glass, or synthetic quartz plate, or a flexible material such as a resin film or an optical resin plate is used. be able to.

  Although it will not specifically limit as thickness of a board | substrate if a columnar formation can be formed, For example, it is preferable to exist in the range of 0.05 mm-0.85 mm.

  A transparent electrode layer may be formed on one surface of the substrate. The transparent electrode layer will be described later in the section “E. Substrate with columnar formation”. In the present invention, the transparent electrode layer may be formed on the substrate before application of the transparent resin composition, or a commercially available substrate on which the transparent electrode layer has been previously formed may be used.

  The thickness of the coating film formed in this step is not particularly limited as long as it is a thickness capable of forming a columnar formed product. The specific thickness of the coating film can be the same as the height of the columnar product described in “E. Substrate with columnar product” described later.

  The application method of the transparent resin composition may be a general application method, such as spin coating, die coating, spray coating, dip coating, roll coating, bead coating, bar coating, and the like. be able to.

  In this step, it is preferable to perform a drying treatment after the formation of the coating film. The drying process can be the same as the process used in a general method for forming a resin layer, and thus description thereof is omitted here.

2. Exposure development process The exposure development process used for this invention is a process of forming the said columnar formation by developing after exposing the said coating film.

The exposure light used in this step is not particularly limited as long as the wavelength corresponding to the strongest absorption peak of the above-described photopolymerization initiator is included. The exposure light can be irradiated using a light source in a known exposure apparatus.
The exposure method used in this step can be the same as that used in a general photolithography method. Specifically, the coating film is exposed through a photomask using a known exposure apparatus. A method of irradiating light can be given. The photomask is not particularly limited as long as a columnar formed product can be formed, and can be the same as a general photomask.

In this step, the coating film is developed after the coating film is exposed.
The developing solution for the coating film is not particularly limited as long as the coating film can be developed in a predetermined pattern, and examples thereof include water and an aqueous alkaline solution (KOH or K ₂ CO ₃ ).

  In this step, if necessary, a baking treatment for baking the columnar formed product may be performed after the development. The baking treatment can be the same as the method used in the general method for forming a resin layer, and thus description thereof is omitted here.

3. Other Steps In the method for manufacturing a substrate with columnar products according to the present invention, there is no particular limitation as long as it has the coating step and the exposure development step described above, and other steps are appropriately selected and added as necessary. be able to. For example, before the coating step, for example, a step of forming a transparent electrode layer on the substrate and a step of forming a light shielding portion having a predetermined pattern on the substrate can be mentioned. In addition, after the exposure and development step, for example, when the substrate with columnar formation is a substrate with columnar formation for liquid crystal lens, a step of forming an alignment film on the transparent electrode layer on which the columnar formation for liquid crystal lens is formed Can be mentioned. The transparent electrode layer, the light-shielding portion, and the alignment film will be described in the section “E. Substrate with columnar formation” described later.

4). Substrate with columnar formation The details of the substrate with columnar formation manufactured according to the present invention are the same as those described in the section “E. Substrate with columnar formation” to be described later. To do.

D. The manufacturing method of the board | substrate with columnar formation for liquid crystal lenses The manufacturing method of the board | substrate with columnar formation for liquid crystal lenses of this invention apply | coats a transparent resin composition on a board | substrate, and forms the coating film, The said coating film And exposing and developing to form a columnar product for a liquid crystal lens that maintains a constant distance between the substrate and the counter substrate used when the substrate and the liquid crystal lens are formed. The transparent resin composition contains a monomer, a polymer, and a photopolymerization initiator, and the strongest absorption peak of the photopolymerization initiator is in the range of 310 nm to 380 nm. It is.

  About the manufacturing method of the board | substrate with columnar formation for liquid crystal lenses, it is the same as the content shown by FIG.4 (a)-(b) demonstrated in the term of the "C. manufacturing method of a board | substrate with columnar formation" mentioned above. Therefore, the description using the drawings is omitted.

  According to the present invention, by using the transparent resin composition described above, it is possible to manufacture a substrate with a columnar product for liquid crystal lenses having a columnar product for liquid crystal lenses having a good shape.

  In addition, since it can be the same as that of the content demonstrated in the term of the above-mentioned "C. manufacturing method of a board | substrate with columnar formation" about the detail of the manufacturing method of the columnar body formation substrate for liquid crystal lenses of this invention, The description here is omitted.

E. Substrate with columnar formation The substrate with columnar formation of the present invention comprises a substrate and a columnar formation formed on the substrate and containing a transparent resin, and the height of the columnar formation is from 30 μm to 30 μm. The absolute value of the difference between the width of the upper base and the width of the lower base is 5.0 μm or less, and the ratio of the height to the width of the lower base is 1.7 to 2.3. It is characterized by being within the range.

  The substrate with a columnar product according to the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 are schematic cross-sectional views showing an example and another example of a substrate with a columnar product of the present invention, and more specifically, a diagram showing an example in which the columnar product is a columnar product for a liquid crystal lens. It is. Since FIG. 1 and FIG. 2 have been described in the above-mentioned section “A. Transparent resin composition for columnar formed product”, description thereof is omitted here.

In the present invention, the “upper bottom of the columnar formed product” refers to a surface of the columnar formed product on the side opposite to the substrate side. The “bottom bottom of the columnar formed product” refers to the surface of the columnar formed product on the substrate side.
“Height of the columnar formation” refers to a vertical distance from the upper base to the lower base of the columnar formation. Specifically, “the height of the columnar formed product” refers to a distance indicated by q in FIGS. 5 (a) to 5 (d).
The “width of the upper base of the columnar formation” means that, in the front shape of the columnar formation, a straight line extending along the horizontal direction with the substrate at the top of the columnar formation, and along each side surface of the columnar formation. The distance between two intersections with an extended straight line. The “width of the upper base of the columnar formed product” specifically refers to a distance indicated by r in FIGS. 5 (a) to 5 (d).
“Width of the bottom of the columnar formation” means two intersections of the front surface of the columnar formation and the surface of the substrate on which the columnar formation is formed and the straight line extending along each side surface of the columnar formation. The distance between. That is, “the width of the bottom of the columnar formed product” refers to a distance between two intersections between the surface of the substrate itself and the two straight lines described above. Further, when the columnar formation is formed on the substrate through another layer, the “width of the lower bottom of the columnar formation” is 2 of the surface of the other layer and the two straight lines described above. The distance between two intersections. “The width of the bottom of the columnar formed product” specifically refers to a distance indicated by s in FIGS. 5 (a) to 5 (d).
The “front shape of the columnar formed product” refers to the shape of the columnar formed product when the substrate with the columnar formed product is viewed from the front direction. Further, when the columnar shaped product has a shape having a long side and a short side such as a rectangular shape and an elliptical shape in the plan view, the surface having the short side is defined as the front direction. Moreover, when the columnar formation is, for example, a square shape in a plan view, a surface having one side is defined as a front direction.
FIGS. 5A to 5D are explanatory views for explaining the shape of the columnar formed product in the present invention. Further, FIG. 5 shows an example in which the columnar formation is a columnar formation for a liquid crystal lens.

  According to the present invention, the height of the columnar formation is higher, the absolute value of the difference between the width of the upper base and the width of the lower base is small, and the ratio of the height to the width of the lower base is large. It can be set as the board | substrate with a columnar formation which has a formation.

  The columnar product in the present invention is not particularly limited as long as it has the shape described above. In the present invention, a columnar formed product for a liquid crystal lens is particularly preferable. Hereinafter, the case where the columnar formed product is a columnar formed product for a liquid crystal lens, that is, the case where the substrate with a columnar formed product of the present invention is a substrate with a columnar formed product for a liquid crystal lens will be described as an example.

1. In the present invention, by having the above-described columnar formation for liquid crystal lens, the cell gap can be maintained well when the liquid crystal lens is formed, and the liquid crystal lens has good strength. It can be set as the columnar formation for liquid crystal lenses.

  More specifically, in the present invention, the cell gap of the liquid crystal lens can be favorably maintained when the height of the columnar formed product for the liquid crystal lens is within the above-described range.

Further, when the absolute value of the difference between the width of the upper base and the width of the lower base exceeds the above range, for example, when the width of the lower base is too small compared to the width of the upper base, There is a possibility that the adhesion of the columnar shaped product for liquid crystal lenses is lowered. In this case, when the rubbing alignment film or the like is formed on the liquid crystal lens columnar formation, the liquid crystal lens columnar formation may be peeled off or damaged by the rubbing treatment. In addition, there is a possibility that the columnar formation for the liquid crystal lens is damaged when the liquid crystal lens is assembled. On the other hand, for example, when the width of the upper base is too small compared to the width of the lower base, the columnar formation for the liquid crystal lens may be damaged during the assembly of the liquid crystal lens.
On the other hand, in this invention, the intensity | strength of the columnar formation for liquid crystal lenses can be made favorable by making the difference of the width | variety of an upper base and the width | variety of a lower base into the range mentioned above.

  Further, in the present invention, since the aspect ratio is within the above-described range, it is possible to form a columnar formation for a liquid crystal lens having a high height in a relatively small area. Therefore, when it is used for a liquid crystal lens, the columnar formation for a liquid crystal lens is not easily observed by an observer, and a good display can be obtained when used with a display panel.

  Hereinafter, the details of the substrate with columnar product for liquid crystal lens of the present invention will be described.

(1) Columnar formation for liquid crystal lens The columnar formation for liquid crystal lens in the present invention has a height in the range of 30 μm to 100 μm, and the absolute value of the difference between the width of the upper base and the width of the lower base is 5. It is 0 μm or less, and the ratio of the height to the width of the lower base is in the range of 1.7 to 2.3.

The height of the columnar formed product for a liquid crystal lens may be in the range of 30 μm to 100 μm, and particularly preferably in the range of 33 μm to 95 μm, particularly in the range of 37 μm to 90 μm.
This is because if the height of the liquid crystal lens columnar formation is less than the above range, it may be difficult to maintain a good cell gap of the liquid crystal lens. Moreover, it is because it may become difficult to obtain the columnar formation for liquid crystal lenses with the favorable aspect ratio mentioned later when the height of the columnar formation for liquid crystal lenses exceeds the said range.

The absolute value of the difference between the width of the upper base and the width of the lower base of the columnar shaped product for a liquid crystal lens may be 5.0 μm or less, particularly 4.5 μm or less, and particularly preferably 4.0 μm or less. .
This is because if the absolute value of the difference between the width of the upper base and the width of the lower base is large, it may be difficult to give sufficient strength to the liquid crystal lens columnar product.

The specific width of the lower base is appropriately selected depending on the use of the liquid crystal lens in which the substrate with a columnar product for liquid crystal lens is used, and is not particularly limited. For example, it is in the range of 20 μm to 50 μm, especially 25 μm to It is preferable to be within the range of 47 μm, particularly within the range of 30 μm to 45 μm.
This is because if the width of the bottom base is small, the strength of the columnar formation for liquid crystal lenses may be reduced, and it may be difficult to form the columnar formation for liquid crystal lenses itself. This is because if it is large, the liquid crystal lens is likely to be visually recognized by an observer, so that it may be difficult to perform good display on a display device using the liquid crystal lens.

Further, the aspect ratio of the liquid crystal lens columnar formed article may be in the range of 1.7 to 2.3, particularly in the range of 1.8 to 2.2, particularly 1.9 to 2.1. It is preferable to be within the range.
When the aspect ratio is less than the above-described range, it is difficult to maintain a good cell gap by using a liquid crystal lens columnar formed product, or a good display is provided in a display device using a liquid crystal lens. This may be difficult. In addition, the above is because when the spectroscopic ratio exceeds the above-described range, it may be difficult to form the columnar shaped product for a liquid crystal lens itself.

  The shape of the liquid crystal lens columnar formed product in plan view is not particularly limited as long as the spacer function can be exhibited, and examples thereof include a circular shape, an elliptical shape, and a polygonal shape such as a quadrangular shape. In the present invention, a shape having a small difference between the long side and the short side is preferable, and a circular shape or a square shape is preferable. This is because the liquid crystal lens has good strength and can suppress liquid crystal alignment disorder in the liquid crystal layer.

  As the front shape of the columnar shaped product for a liquid crystal lens, it is only necessary to have the above-mentioned height, the absolute value of the difference between the width of the upper base and the width of the lower base, and the aspect ratio. For example, FIG. And as shown in FIG. 5B, the width r of the upper base and the width s of the lower base may be equal, and the width r of the upper base is lower than that of the lower base as shown in FIG. It may be a forward tapered shape that is smaller than the width s, or may be a reverse tapered shape in which the width r of the upper base is larger than the width s of the lower base. Further, as shown in FIGS. 5A and 5B, when the width r of the upper base and the width s of the lower base are equal, the side surface is perpendicular to the substrate as shown in FIG. 5A. Even if it is a barrel shape in which the width t between the upper base and the lower base is larger than the width r of the upper base and the width s of the lower base as shown in FIG. Good. In the present invention, it is particularly preferable that the front shape of the liquid crystal lens columnar product is a vertical shape.

  The planar view shape and front shape of the columnar shaped product for liquid crystal lens can be confirmed using, for example, a scanning electron microscope (SEM). Further, the height, the width of the upper base, the width of the lower base, the width of other portions, and the like of the columnar formation for the liquid crystal lens can be calculated based on the measured values of the observation image of the SEM. A general scanning electron microscope (SEM) can be used.

  The columnar formation for liquid crystal lenses in the present invention can be suitably formed by using the transparent resin composition described in “A. Transparent resin composition for columnar formation” described above.

(2) Substrate The substrate in the present invention supports the above-described columnar formed product for a liquid crystal lens. The details of the substrate can be the same as the contents described in the above-mentioned section “C. Manufacturing Method of Substrate with Columnar Form”, and thus the description thereof is omitted here.

(3) Other Configurations The substrate with a columnar product for liquid crystal lenses of the present invention is not particularly limited as long as it has the above-described substrate and the columnar product for liquid crystal lenses, and has other configurations as necessary. It can be selected and added as appropriate.

(A) Transparent electrode layer As shown in FIGS. 1 and 2, the substrate with a columnar product for a liquid crystal lens of the present invention is usually formed with a transparent electrode layer 4 between the substrate 2 and the columnar product 3 for a liquid crystal lens. Is done. The transparent electrode layer 4 may be continuously formed on the substrate 2 as shown in FIG. 1, or may be formed on the substrate 2 in a predetermined pattern such as a stripe shape as shown in FIG. Good. In the present invention, it is particularly preferable that the transparent electrode layer is continuously formed on the substrate. This is because the substrate with a columnar product for liquid crystal lenses can be formed with a small number of steps.

  When the transparent electrode layer is formed in a pattern, the pattern can be the same as that used for a known liquid crystal lens. When the transparent electrode layer is formed in a pattern, specifically, a long transparent electrode layer arranged in a stripe shape can be used. Since the width of the long transparent electrode layer, the pitch width of the stripes, and the like can be the same as those of a known liquid crystal lens, description thereof is omitted here.

  The transparent conductive material used for the transparent electrode layer can be the same as that used for a general display device, and examples thereof include indium tin oxide (ITO) and indium zinc oxide (IZO). .

  The thickness of the transparent electrode layer is not particularly limited as long as it has predetermined conductivity, and for example, it is preferably in the range of 100 nm to 300 nm.

As a method for forming the transparent electrode layer, a general method can be used, and examples thereof include a vapor deposition method and a sputtering method.
Moreover, when forming a transparent electrode layer in pattern shape, after forming a thin film by a vapor deposition method or sputtering method, the method of patterning by the photolithographic method etc. is used suitably.

(B) Alignment Film As shown in FIG. 6, the substrate with a columnar product for liquid crystal lenses of the present invention has an alignment film 5 formed so as to cover the substrate 2 and the columnar product 3 for liquid crystal lenses. Also good.

The alignment film can be the same as a general alignment film, and examples thereof include an alignment film subjected to rubbing treatment.
The method for forming the alignment film can be a general method, and the description thereof is omitted here.

(C) Light-shielding part Even if the board | substrate with a columnar formation for liquid crystal lenses of this invention has the light-shielding part 6 formed between the board | substrate 2 and the columnar formation 3 for liquid crystal lenses, as shown in FIG. Good. Further, when the transparent electrode layer is continuously formed, the light shielding portion is formed in a pattern corresponding to the transparent electrode layer formed in a pattern on the counter substrate when the liquid crystal lens is formed. On the other hand, when the transparent electrode layer is formed in a pattern, the light shielding portion is usually formed in a pattern corresponding to the transparent electrode layer.

As the light-shielding portion, for example, the same one used for a general display device such as a color filter can be used, which may be one using an inorganic material such as chromium, and contains a light-shielding colorant. It is also possible to use a light shielding resin.
The method for forming the light shielding portion can be a general method, and thus the description thereof is omitted here.

(4) Manufacturing method of substrate with columnar formation for liquid crystal lens About the manufacturing method of the substrate with columnar formation for liquid crystal lens of this invention, the term of "D. Manufacturing method of substrate with columnar formation for liquid crystal lens" mentioned above. Therefore, the description is omitted here.

(5) Applications The substrate with a columnar product for liquid crystal lenses of the present invention can be generally used for the liquid crystal lens 30 as shown in FIG.

2. Substrate with columnar formation The substrate with columnar formation of the present invention is not limited to the above-described substrate with columnar formation for liquid crystal lenses, and is not particularly limited as long as it has the columnar formation having the above-described shape as a configuration.
Such columnar formations can be the same as those used in the various electronic elements described in the above-mentioned section “A. Substrate with Columnar Formations”, and thus description thereof is omitted here.
As a manufacturing method of the substrate with columnar formations in the present invention, the manufacturing method described in the above-mentioned section “C. Manufacturing method of substrate with columnar formations” can be used.

F. A substrate with a columnar product for a liquid crystal lens The substrate with a columnar product for a liquid crystal lens of the present invention is between a substrate and a counter substrate that is formed on the substrate and contains a transparent resin and is used as the substrate and a liquid crystal lens. A columnar formation for a liquid crystal lens that holds the liquid crystal lens at a certain distance, the height of the columnar formation for a liquid crystal lens is in the range of 30 μm to 100 μm, and the width of the upper base and the width of the lower base The absolute value of the difference is 5.0 μm or less, and the ratio of the height to the width of the lower base is in the range of 1.7 to 2.3.

  The substrate with a columnar formed article for a liquid crystal lens of the present invention can be the same as the contents shown in FIGS. 1 and 2 described in the above-mentioned section “A. Transparent resin composition for columnar formed article”. The description using the drawings is omitted.

  According to the present invention, by having the above-mentioned columnar formation for a liquid crystal lens, the cell gap can be maintained well when the liquid crystal lens is formed, and the liquid crystal lens columnar formation for a liquid crystal lens having good strength and can do.

  The details of the substrate with columnar formations for a liquid crystal lens of the present invention can be the same as the contents described in the above-mentioned section “E. Substrate with columnar formations”, and thus description thereof is omitted here.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples.

[Example 1]
(Preparation of copolymer resin solution)
In a polymerization tank, 63 parts by mass of methyl methacrylate (MMA), 12 parts by mass of acrylic acid (AA), 6 parts by mass of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by mass of diethylene glycol dimethyl ether (DMDG) are charged. After stirring and dissolving, 7 parts by mass of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly. Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour. Further, 7 parts by mass of glycidyl methacrylate (GMA), 0.4 parts by mass of triethylamine, and 0.2 parts by mass of hydroquinone were added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution ( A solid content of 50%) was obtained.

(Preparation of transparent resin composition)
Each composition shown below was mixed to obtain a transparent resin composition.
<Composition of transparent resin composition>
・ Dipentaerythritol pentaacrylate (Sartomer SR399)
59 parts by mass-The above copolymer resin solution (solid content 50%) 14.5 parts by mass-Irgacure 369 (BASF) 1.5 parts by mass-Diethylene glycol dimethyl ether 25 parts by mass

(Production of substrate with columnar formation)
As the substrate, a glass substrate (Corning 1737 glass) having a size of 300 mm × 400 mm and a thickness of 0.7 mm was prepared. After this substrate was washed according to a conventional method, the above-described transparent resin composition was applied by a spin coating method and dried to obtain a coating film having a thickness of 60 μm.
A photomask having an opening with an opening diameter of 25 μm is placed at a distance of 200 μm from the coating surface, and irradiated with ultraviolet rays for 10 seconds (exposure amount: 100 mJ / cm ² ) using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. did. Subsequently, it was immersed in a 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 ° C.) for 1 minute for alkali development to remove only the uncured portion of the coating film. Then, the said board | substrate was heat-processed for 30 minutes in 200 degreeC atmosphere, and the columnar formation was obtained.
The substrate with columnar formation was obtained by the above procedure.

[Example 2]
A substrate with a columnar product was obtained in the same manner as in Example 1 except that Irgacure 369 was changed to Irgacure OXE02 in the transparent resin composition described above.

[Comparative Example 1]
A substrate with a columnar product was obtained in the same manner as in Example 1 except that Irgacure 369 was changed to Irgacure 907 and a photomask having an opening with an opening diameter of 50 μm was used in the transparent resin composition described above.

[Comparative Example 2]
In the transparent resin composition described above, the coating film was prepared, exposed and developed in the same procedure as in Example 1 except that Irgacure 369 was changed to Irgacure 907 and a photomask having an opening with an opening diameter of less than 50 μm was used. As a result, a columnar product could not be formed on the substrate.

[Evaluation]
Table 1 shows the shape of the columnar product in the obtained substrate with columnar product.
In Table 1, Δ (upper base-lower base) indicates the absolute value of the difference between the width of the upper base and the width of the lower base. In Table 1, the shape is ○ when the absolute value of the height, the aspect ratio, and the difference between the width of the upper base and the width of the lower base is within the range in the present invention, and the shape does not satisfy the range in the present invention Is shown as x.

In Examples 1 and 2, a columnar product having a good shape could be obtained by using a polymerization initiator having an absorption peak on the long wavelength side.
On the other hand, in Comparative Example 1, when the aspect ratio was 2.0, the width of the upper base was larger than the width of the lower base, and a columnar shaped product having an inverse taper shape was obtained. This is considered to be due to the fact that the use of Irgacure 907 resulted in a decrease in the deep curability of the transparent resin composition, and the photopolymerization reaction in the thickness direction of the coating film did not sufficiently proceed.
In Comparative Example 2, when a photomask having an opening diameter of less than 50 μm is used, the width of the lower bottom is further reduced, and the adhesion between the substrate and the columnar formed product cannot be obtained, so that the columnar formed product is formed. This is thought to be difficult.

1 ... Substrate with columnar formation for liquid crystal lens (Substrate with columnar formation)
2 ... Substrate 3 ... Columnar formation for liquid crystal lens (columnar formation)
3 '... coating film 4 ... transparent electrode layer

Claims (2)

A substrate with a columnar product having a substrate and a columnar product formed on the substrate and containing a transparent resin,
The columnar product contains a monomer, a polymer, and a photopolymerization initiator, and uses a transparent resin composition for columnar product in which the strongest absorption peak of the photopolymerization initiator is in the range of 310 nm to 380 nm. Is formed,
The columnar shaped product has a height in a range of 30 μm to 100 μm;
The absolute value of the difference between the width of the upper base and the width of the lower base is 5.0 μm or less,
The ratio of the height to the width of the lower bottom state, and are in the range of 1.7 to 2.3,
The width of the previous year under the bottom, a substrate with columnar formations, characterized in der Rukoto range of 20Myuemu～50myuemu. Columnar formation for a liquid crystal lens comprising a substrate and a columnar formation for a liquid crystal lens, which is formed on the substrate and contains a transparent resin and which is used when the substrate and the liquid crystal lens are used to maintain a fixed distance between the opposing substrates A substrate with objects,
The liquid crystal lens columnar product contains a monomer, a polymer, and a photopolymerization initiator,
The photopolymerization initiator is formed using a transparent resin composition for a columnar formation for a liquid crystal lens having the strongest absorption peak in the range of 310 nm to 380 nm,
The columnar shaped product for liquid crystal lenses has a height in the range of 30 μm to 100 μm,
The absolute value of the difference between the width of the upper base and the width of the lower base is 5.0 μm or less,
The ratio of the height to the width of the lower bottom state, and are in the range of 1.7 to 2.3,
The width of the previous year under bottom, cylindrical formation with a substrate for a liquid crystal lens, wherein Der Rukoto range of 20Myuemu～50myuemu.

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