Abstract: The adhesive sheet includes an adhesive layer (A1L) in solid form at 18° C., wherein the adhesive layer (A1L) contains an epoxy resin, at least one surface of the adhesive layer (A1L) has a tackiness agent region (A2R) formed by partially providing a tackiness agent (A2), and a region where the tackiness agent region (A2R) is not formed on the surface is an adhesive-layer-exposed region (A1LR) where a surface of the adhesive layer (A1L) is exposed. This adhesive sheet has excellent temporary fixability at the time of sticking (a characteristic that exhibits the tackiness force necessary for temporary fixation) and adhesive force after heat curing.

Abstract: Provided is an acrylic resin composition having high chemical resistance and high oil resistance. This acrylic resin composition contains a polymer that includes a unit derived from a predetermined monomer, wherein the proportion of the unit derived from the predetermined monomer contained in the polymer to 100% by mass of all monomer units constituting the polymer is 40-99% by mass, and the tensile strength of the acrylic resin composition after being immersed in oleic acid for 24 hours is 50% or more of the value of the tensile strength thereof before being immersed in oleic acid.

Abstract: An atomic cell filled with an alkali metal includes: a substrate; a first coating layer provided on an inner wall of the substrate and derived from a first molecule; a second coating layer provided on the first coating layer, and derived from a second molecule having a non-polar group and a reactive group that undergoes a desorption reaction with the first molecule; and a third coating layer provided on the second coating layer and derived from a non-polar third molecule. The third coating layer has a degree of crystallinity of 70% or more.

Abstract: A crosslinking adhesive composition containing an acrylic copolymer with 3 parts by mass or more and less than 25 parts by mass of component (A1), having two or more hydroxyl group-containing (meth)acrylate monomers, each of which has a defined molecular structure; 5 parts by mass or more and less than 25 parts by mass of component (A2) having a carboxylic acid group-containing (meth)acrylate monomer; 5 parts by mass or more and less than 30 parts by mass of component (A3) having a (meth)acrylic acid alkyl ester monomer with a defined molecular structure; and 50 parts by mass or more and less than 90 parts by mass of component (A4) having a (meth)acrylic acid alkyl ester monomer having a defined molecular structure, with respect to 100 parts by mass consisting of the sum of components (A1) to (A4).

Abstract: Disclosed is an adhesive tape having an adhesive layer on one side or both sides of a polyolefin-based foam substrate containing closed cells, wherein the 65% compressive strength measured by compressive strength measurement according to JIS K 7181 is 6.0 MPa or less and the 80% compressive strength thereof is 20 MPa or less. This adhesive tape is excellent in flexibility at high compression, and excellent in performances such as, for example, impact resistance and, stability when deformed greatly.

Abstract: Provided is an acrylic resin composition having high chemical resistance and high oil resistance. This acrylic resin composition contains a polymer that includes a unit derived from a predetermined monomer, wherein the proportion of the unit derived from the predetermined monomer contained in the polymer to 100% by mass of all monomer units constituting the polymer is 40-99% by mass, and the tensile strength of the acrylic resin composition after being immersed in oleic acid for 24 hours is 50% or more of the value of the tensile strength thereof before being immersed in oleic acid.

Abstract: Disclosed is an adhesive tape having an adhesive layer on one side or both sides of a base 1, wherein the adhesive layer when having the adhesive layer on one side of the base 1, or at least one adhesive layer of two adhesive layers when having the adhesive layers on both sides of the base 1 has a first adhesive layer 2 in contact with the base 1 and a second adhesive region 3 in contact with the first adhesive layer 2 and which is situated on the surface side of the adhesive tape, and the storage elastic modulus G? of the first adhesive layer 2 is higher than the storage elastic modulus G? of the second adhesive region 3. This adhesive tape provides easy position adjustment and easy air removal at the time of sticking, and has excellent waterproofness after sticking.

Abstract: A gas cell includes a cell main body having a first chamber defined by an inner wall, and a first paraffin film provided on the inner wall, wherein in the first chamber, a gas which interacts with an electromagnetic wave is stored, the first paraffin film is a pure paraffin film, and a paraffin constituting the first paraffin film is arranged such that the directions of the molecular axes are aligned.

Abstract: Disclosed is an adhesive tape having an adhesive layer on one side or both sides of a polyolefin-based foam substrate containing closed cells, wherein the 65% compressive strength measured by compressive strength measurement according to JIS K 7181 is 6.0 MPa or less and the 80% compressive strength thereof is 20 MPa or less. This adhesive tape is excellent in flexibility at high compression, and excellent in performances such as, for example, impact resistance and, stability when deformed greatly.

Abstract: Disclosed is an adhesive tape wherein the adhesive tape has an adhesive layer on one side or both sides of a base, the base contains 30% by mass or more of an ethylene-vinyl acetate copolymer, and the tensile modulus of the base measured according to JIS K7161 2014 is 30 N/mm2 or more, and the adhesive tape has excellent properties such as impact resistance, an antistatic property, shear deformation rate during heating and pressing force.

Abstract: A gas cell includes a cell main body having a first chamber defined by an inner wall, and a first paraffin film provided on the inner wall, wherein in the first chamber, a gas which interacts with an electromagnetic wave is stored, the first paraffin film is a pure paraffin film, and a paraffin constituting the first paraffin film is arranged such that the directions of the molecular axes are aligned.

Abstract: A pyroelectric body includes an oxide containing iron, manganese, bismuth, and gadolinium, wherein the oxide has a perovskite-type crystal structure, and in the oxide, the ratio of the number of atoms of gadolinium to the total number of atoms of A-site elements is 8.0 at % or more and 18 at % or less. In the oxide, the ratio of the number of atoms of manganese to the total number of atoms of B-site elements is preferably 1.0 at % or more and 2.0 at % or less. In the oxide, the ratio of the number of atoms of titanium to the total number of atoms of B-site elements is preferably 0 at % or more and 4.0 at % or less. The pyroelectric body is preferably used at an environmental temperature in the range of ?40° C. or higher and 40° C. or lower.

Abstract: A thermoelectric conversion element includes a pair of electrodes and a pyroelectric material, which is a ferroelectric layer, sandwiched between the pair of electrodes. The pyroelectric material includes at least Bi (bismuth), La (lanthanum), and Fe (iron). The molar fraction of La in a Bi/La site in the crystal structure of the pyroelectric material is 0.15 or more and 0.20 or less. Such a thermoelectric conversion element, and a light detection device and electronic apparatus which include the thermoelectric conversion element have a good pyroelectric function without including Pb (lead).

Abstract: A pyroelectric material is constituted with an oxide containing iron, manganese, bismuth, and lanthanum, in which a ratio of the number of the manganese atoms to the sum of the number of the iron atoms, the number of the manganese atoms, and the number of titanium atoms is equal to or greater than 1.0 at % and equal to or less than 2.0 at %, and a ratio of the number of the titanium atoms to the sum of the number of the iron atoms, the number of the manganese atoms, and the number of the titanium atoms is equal to or greater than 0 at % and equal to or less than 4.0 at %.

Abstract: An infrared sensor includes a heat sensing element, the heat sensing element includes a first electrode, a second electrode and a dielectric film formed between the first electrode and the second electrode. The heat sensing element senses heat based on a change of a resistance value. The dielectric film includes at least Bi and Fe.

Abstract: An infrared sensor includes a heat sensing element in which a first electrode, a dielectric film, and a second electrode are sequentially laminated; and an electric charge detection device. The dielectric film represents antiferroelectricity and has a spontaneous polarization in a predetermined measurement environment. The electric charge detection device calculates an amount of relaxation current flowing by a change of the spontaneous polarization, and senses heat of the heat sensing element based on temperature dependence of the amount of relaxation current.

Abstract: A thermoelectric conversion element includes a pair of electrodes and a pyroelectric material, which is a ferroelectric layer, sandwiched between the pair of electrodes. The pyroelectric material includes at least Bi (bismuth), La (lanthanum), and Fe (iron). The molar fraction of La in a Bi/La site in the crystal structure of the pyroelectric material is 0.15 or more and 0.20 or less. Such a thermoelectric conversion element, and a light detection device and electronic apparatus which include the thermoelectric conversion element have a good pyroelectric function without including Pb (lead).

Abstract: An infrared sensor includes a heat sensing element in which a first electrode, a dielectric film, and a second electrode are sequentially laminated; and an electric charge detection device. The dielectric film represents antiferroelectricity and has a spontaneous polarization in a predetermined measurement environment. The electric charge detection device calculates an amount of relaxation current flowing by a change of the spontaneous polarization, and senses heat of the heat sensing element based on temperature dependence of the amount of relaxation current.

Abstract: A thermal detector includes a support member, a heat-detecting element formed on the support member, a light-reflecting layer formed on the support member, a light-absorbing layer formed above the light-reflecting layer and the heat-detecting element, and a thermal transfer member including a connecting portion connected to the heat-detecting element and a thermal collecting portion contacting the light-absorbing layer and having a larger area than the connecting portion as seen in plan view. The thermal collecting portion is optically transmissive at least with respect to light of a prescribed wavelength.

Abstract: A thermal detector includes a substrate, a thermal detection element and a support member. The substrate has a concave portion, a bottom surface of the concave portion forming a light-reflecting curved surface. The thermal detection element includes a light-absorbing film. The support member supports the thermal detection element with a cavity being provided between the substrate and the support member. The light-reflecting curved surface and the light-absorbing film overlap each other in plan view, the light-reflecting curved surface having a projected area in plan view larger than an area of the light-absorbing film.