Abstract: A precursor sol of aluminum oxide includes a solvent and particles containing a hydrolysate of an aluminum compound and/or a condensate of the hydrolysate, in which the particles have an average particle size of 2.5 nm to 7 nm. A method for producing an optical member includes the steps of feeding the precursor sol of aluminum oxide described above onto a base to form an aluminum oxide film and immersing the aluminum oxide film in hot water with a temperature of 60° C. to 100° C. to form a textured structure comprising aluminum oxide boehmite.

Abstract: A precursor sol of aluminum oxide contains a polycondensate formed by the hydrolysis of an aluminum alkoxide or an aluminum salt, a solvent, and an organic aluminum compound having a specific structure. An optical member is produced by a process including a step of immersing an aluminum oxide film in a hot water with a temperature of 60° C. to 100° C. to form a textured structure made of aluminum oxide crystals, the aluminum oxide film being formed by feeding the precursor sol of aluminum oxide onto a base. A method for producing an optical member includes a step of immersing an aluminum oxide film in a hot water with a temperature of 60° C. to 100° C. to form a textured structure made of aluminum oxide crystals, the aluminum oxide film being formed by feeding the precursor sol of aluminum oxide onto a base.

Abstract: An optical member includes a base material and an antireflective layer on the base material wherein the antireflective layer includes a plurality of fine protrusions on a surface thereof and a support layer for supporting the protrusions, and the support layer contains boron in an amount of 7×1019 atoms/cm3 or more and 2.5×1020 atoms/cm3 or less.

Abstract: A precursor sol of aluminum oxide contains a polycondensate formed by the hydrolysis of an aluminum alkoxide or an aluminum salt, a solvent, and an organic aluminum compound of general formula (1): wherein R1 and R2 each represent an alkyl group having 1 to 6 carbon atoms, a perfluoroalkyl group, or an allyl group; R3 represents an alkyl group having 1 to 6 carbon atoms, a perfluoroalkyl group, an allyl group, or an aryl group; and n represents an integer of 1 to 3. An optical member is produced by a process including a step of immersing an aluminum oxide film in a hot water with a temperature of 60 ° C. to 100 °C. to form a textured structure made of aluminum oxide crystals, the aluminum oxide film being formed by feeding the precursor sol of aluminum oxide onto a base. A method for producing an optical member includes a step of immersing an aluminum oxide film in a hot water with a temperature of 60 ° C. to 100 ° C.

Abstract: An optical member includes a laminated body configured to reduce light reflection disposed on a substrate, wherein a surface of the laminated body is a porous layer or a layer having a textured structure, and at least one layer of the laminated body is a polymer layer containing a linear polymer and a branched polymer. A method for manufacturing the optical member is also provided. The branched polymer content is 10% by weight or more and 90% by weight or less of the total weight of the linear polymer and the branched polymer. The layer having a textured structure contains crystals mainly composed of aluminum oxide.

Abstract: A precursor sol of aluminum oxide includes particles containing a hydrolysate and/or a condensate of an aluminum compound, a solvent, and an organo aluminum compound. When a pulsed-NMR T2 relaxation curve of nuclide 1H of the precursor sol of aluminum oxide includes two components with different T2 relaxation times and the component with the longer T2 relaxation time has an abundance level of CL (%) and the component with the shorter T2 relaxation time has an abundance level of CS (%), the relative proportion RCS (%) defined by [{CS/(CS+CL)}×100] is in the range of 23.5% to 50.0%, both inclusive.

Abstract: An optical member has an antireflection coating disposed on a substrate. The outermost layer of the antireflection coating is a crystalline layer having a textured structure containing aluminum oxide crystals. Part or the entire of the crystalline layer contains a carboxylic acid compound. A method of producing an optical member includes a step (a) of forming an aluminum oxide layer containing aluminum oxide on a substrate, a step (b) of forming crystalline layer having a textured structure by bringing the aluminum oxide layer into contact with hot water of 60° C. or more and 100° C. or less or water vapor, a step (c) of applying a coating liquid containing a carboxylic acid compound and a solvent onto the crystalline layer, and a step (d) of removing the solvent of the coating liquid.

Abstract: Provided is an optical member capable of keeping a high performance antireflection effect over a long period of time with respect to an arbitrary substrate. The optical member has plural layers on a substrate, and includes at least one metal oxide layer having a void, and at least one layer containing an organic resin as a main component formed between the substrate and the metal oxide layer. The metal oxide layer is a plate crystal layer formed of a plate crystal containing aluminum oxide as a main component and a surface of the plate crystal layer has an uneven profile. The organic resin has an aromatic ring and/or a hetero ring in at least a part thereof.

Abstract: There is provided an optical member that can retain a high antireflection effect on a substrate for a long time. The optical member includes a laminated body that can reduce the reflection of light formed on a substrate surface, wherein at least one layer of the laminated body is a polyimide layer containing a polyimide film, and the polyimide contains a repeating unit represented by the following general formula (1), and a 1,4-cyclohexylene group in the main chain of R2 in the general formula (1) contains 90% by mole or more of a trans-1,4-cyclohexylene group: wherein R1 denotes a tetravalent organic group, and R2 denotes a divalent organic group having one or two or more 1,4-cyclohexylene groups in the main chain.

Abstract: Provided is an optical member where at least a layer having polyimide as a main component and a layer having a textured structure arising from a crystal containing aluminum oxide as a main component are stacked in this order. The polyimide includes a silane group in a side chain via an amide bond.

Abstract: Provided is an optical member capable of keeping a high performance antireflection effect over a long period of time with respect to an arbitrary substrate. The optical member has plural layers on a substrate, and includes at least one metal oxide layer having a void, and at least one layer containing an organic resin as a main component formed between the substrate and the metal oxide layer. The metal oxide layer is a plate crystal layer formed of a plate crystal containing aluminum oxide as a main component and a surface of the plate crystal layer has an uneven profile. The organic resin has an aromatic ring and/or a hetero ring in at least a part thereof.

Abstract: Provided is an optical member capable of keeping a high performance antireflection effect over a long period of time with respect to an arbitrary substrate. The optical member has plural layers on a substrate, and includes at least one metal oxide layer having a void, and at least one layer containing an organic resin as a main component formed between the substrate and the metal oxide layer. The metal oxide layer is a plate crystal layer formed of a plate crystal containing aluminum oxide as a main component and a surface of the plate crystal layer has an uneven profile. The organic resin has an aromatic ring and/or a hetero ring in at least a part thereof.

Abstract: An optical member includes a ray effective area, a ray ineffective area, at least one continuous protective film arranged over the ray effective area and at least part of the ray ineffective area, a light-shielding film arranged on the protective film located in the ray ineffective area, and a plate-crystal film arranged on the protective film located in the ray effective area, the plate-crystal film including mainly aluminum oxide and having a textured structure on a surface thereof, and an optical system includes the optical member.

Abstract: Provided is an optical member capable of keeping a high performance antireflection effect over a long period of time with respect to an arbitrary substrate. The optical member has plural layers on a substrate, and includes at least one metal oxide layer having a void, and at least one layer containing an organic resin as a main component formed between the substrate and the metal oxide layer. The metal oxide layer is a plate crystal layer formed of a plate crystal containing aluminum oxide as a main component and a surface of the plate crystal layer has an uneven profile. The organic resin has an aromatic ring and/or a hetero ring in at least a part thereof.

Abstract: A precursor sol of aluminum oxide contains a polycondensate formed by the hydrolysis of an aluminum alkoxide or an aluminum salt, a solvent, and an organic aluminum compound having a specific structure. An optical member is produced by a process including a step of immersing an aluminum oxide film in a hot water with a temperature of 60° C. to 100° C. to form a textured structure made of aluminum oxide crystals, the aluminum oxide film being formed by feeding the precursor sol of aluminum oxide onto a base. A method for producing an optical member includes a step of immersing an aluminum oxide film in a hot water with a temperature of 60° C. to 100° C. to form a textured structure made of aluminum oxide crystals, the aluminum oxide film being formed by feeding the precursor sol of aluminum oxide onto a base.

Abstract: Provided is an optical member capable of keeping a high performance antireflection effect over a long period of time with respect to an arbitrary substrate. The optical member has plural layers on a substrate, and includes at least one metal oxide layer having a void, and at least one layer containing an organic resin as a main component formed between the substrate and the metal oxide layer. The metal oxide layer is a plate crystal layer formed of a plate crystal containing aluminum oxide as a main component and a surface of the plate crystal layer has an uneven profile. The organic resin has an aromatic ring and/or a hetero ring in at least a part thereof.

Abstract: There is provided a field effect transistor having an organic semiconductor layer, including: an organic semiconductor layer containing at least porphyrin; and a layer composed of at least a polysiloxane compound, the layer being laminated on the organic semiconductor layer so as to be in intimate contact with the organic semiconductor layer. As a result, there can be provided a field effect transistor which enables an organic semiconductor layer having high crystallinity and high orientation to be formed and which exhibits a high mobility.

Abstract: An optical element includes an optically effective area and an optically ineffective area partly or entirely coated with a coating opaque at wavelengths used. The opaque coating contains a cured product prepared from an epoxy resin and a curing agent containing an alicyclic acid anhydride. The alicyclic acid anhydride is preferably methylhexahydrophthalic anhydride or hexahydrophthalic anhydride.

Abstract: An object of the present invention is to provide a field effect transistor showing high field-effect mobility and a high ON/OFF ratio, which can be produced simply by using a porphyrin compound with excellent crystallinity and orientation. The field effect transistor according to the present invention transistor contains at least an organic semiconductor layer, wherein the organic semiconductor layer contains at least a porphyrin compound and has a maximum diffraction intensity I1 in a Bragg angle (2?) range of 9.9° to 10.4° stronger than a maximum diffraction intensity I2 in a Bragg angle (2?) range of 23.0° to 26.0° in X-ray diffraction using CuK? radiation.

Abstract: Provided is a field effect transistor having an organic semiconductor layer, in which crystal grains having a maximum diameter of 10 ?m or more account for 25% or more of the surface area of the organic semiconductor layer. The organic semiconductor layer preferably contains 7 to 200 crystal grains having a maximum diameter of 10 ?m or more per 0.01 mm2. The organic semiconductor layer preferably contains a porphyrin crystal.