Abstract: Provided is an easy method for production of a high-performance polyfunctional compound which can be used as an optical recording material, an optical waveguide material, a photo-alignment film material, or the like, in a simple manner. The method for production of a polyfunctional compound includes conducting a Michael addition of a compound (A) having a hydrogen atom of pKa ?15 to a (meth)acrylate or a (meth)acrylamide (B), in which at least one of the compounds (A) and (B) has a photoisomerization group and/or a liquid-crystalline group.

Abstract: A multilayer coil component includes internal conductors made of silver (Ag) having metal films provided on surfaces thereof to suppress migration of Ag contained in the internal conductors and/or relieve internal stress between magnetic ceramic layers and internal conductor layers without forming gaps at interfaces between the internal conductors including the metal films and a magnetic ceramic surrounding the internal conductors and the interfaces between the internal conductors and the magnetic ceramic. In a manufacturing method for forming a multilayer coil, an acidic solution containing a metal is allowed to penetrate a magnetic ceramic through side surfaces thereof and side gap sections that are regions between side portions of internal conductors and the side surfaces to reach the interfaces between the internal conductors and a surrounding magnetic ceramic, whereby the metal is deposited on surfaces of the internal conductors.

Abstract: A multilayer coil component is provided in which solder fusibility and a self-alignment property are prevented from being degraded due to absorption of a flux in a soldering step. The multilayer coil component has no voids present at interfaces between internal conductors 2 and a magnetic ceramic 11 located therearound. A magnetic ceramic forming a central region 7 has a region (side gap portion 8) which extends from a side surface 3a of the magnetic ceramic element to the internal conductors and which has a pore area ratio of 6% to 20%. At least one of a first external layer region 9a, located at an upper side of the central region, and a second external layer region 9b, located at a lower side of the central region (an external layer region at a mounting surface side of a mounting substrate), has a pore area ratio of less than 5%.

Abstract: Provided is an easy method for production of a high-performance polyfunctional compound which can be used as an optical recording material, an optical waveguide material, a photo-alignment film material, or the like, in a simple manner. The method for production of a polyfunctional compound includes conducting a Michael addition of a compound (A) having a hydrogen atom of pKa?15 to a (meth)acrylate or a (meth)acrylamide (B), in which at least one of the compounds (A) and (B) has a photoisomerization group and/or a liquid-crystalline group.

Abstract: A multilayer coil component is provided in which solder fusibility and a self-alignment property are prevented from being degraded due to absorption of a flux in a soldering step. The multilayer coil component has no voids present at interfaces between internal conductors 2 and a magnetic ceramic 11 located therearound. A magnetic ceramic forming a central region 7 has a region (side gap portion 8) which extends from a side surface 3a of the magnetic ceramic element to the internal conductors and which has a pore area ratio of 6% to 20%. At least one of a first external layer region 9a, located at an upper side of the central region, and a second external layer region 9b, located at a lower side of the central region (an external layer region at a mounting surface side of a mounting substrate), has a pore area ratio of less than 5%.

Abstract: A highly reliable multilayer coil component is provided without forming voids between magnetic ceramic layers and internal conductor layers. According to the multilayer coil component, an internal stress problem is reduced, the direct current resistance is low, and fracture of internal conductors caused by the surge or the like is not likely to occur. An acidic solution is allowed to permeate a magnetic ceramic element from a side surface thereof through a side gap portion which is a region between side portions of the internal conductors and the side surface of the magnetic ceramic element and to reach interfaces between the internal conductors and a magnetic ceramic located therearound. A pore area ratio of the magnetic ceramic of the side gap portion which is located between the side portions of the internal conductors and the side surface of the magnetic ceramic element is set in the range of 6% to 28%.

Abstract: It is provided for a resin composition including (A) at least one polyamic acid having the structure represented by the following formula (1): wherein R1 is independently an alkyl group having 1 to 3 carbon atoms or a cyano group; a is independently an integer of 0 to 4; R is a tetravalent organic group; n is an integer of 1 to 4; and m is an integer of 1 to 100,000, and (E) an organic solvent.

Abstract: It is provided for a resin composition including (A) at least one polyamic acid having the structure represented by the following formula (1): wherein R1 is independently an alkyl group having 1 to 3 carbon atoms or a cyano group; a is independently an integer of 0 to 4; R is a tetravalent organic group; n is an integer of 1 to 4; and m is an integer of 1 to 100,000, and (E) an organic solvent.

Abstract: Provided are a liquid crystal compound which can exhibit liquid-crystalline phase even at low temperatures, is excellent in uniform application performance and compatibility with another component, and suppresses inclusion of a polymeric component other than the object component, and an optical element having little defects in appearance, a polarizing plate, an image display apparatus, and an optical recording material using the liquid crystal compound. The liquid crystal compound of the present invention includes two or more chemical structures Q each represented by a general formula (1).

Abstract: A process for producing a carbonic ester, characterized in that an aromatic monohydroxy compound or an aliphatic monohydroxy compound is subjected to oxidative carbonylation with carbon monoxide and oxygen in the presence of a palladium catalyst using a compound having a carbonate bond as a reaction solvent. A process for producing a polycarbonate, characterized in that an aromatic dihydroxy compound or an aliphatic dihydroxy compound is subjected to oxidative carbonylation with carbon monoxide and oxygen in the presence of a palladium catalyst using a compound having a carbonate bond as a reaction solvent is also described. The carbonic ester can be produced with a higher yield and at a higher reaction rate and, also, a polycarbonate having a higher molecular weight as compared with the conventional method can be produced with a higher yield and at a higher reaction rate.

Abstract: A process for producing a carbonic ester, characterized in that an aromatic monohydroxy compound or an aliphatic monohydroxy compound is subjected to oxidative carbonylation with carbon monoxide and oxygen in the presence of a palladium catalyst using a compound having a carbonate bond as a reaction solvent. A process for producing a polycarbonate, characterized in that an aromatic dihydroxy compound or an aliphatic dihydroxy compound is subjected to oxidative carbonylation with carbon monoxide and oxygen in the presence of a palladium catalyst using a compound having a carbonate bond as a reaction solvent is also described. The carbonic ester can be produced with a higher yield and at a higher reaction rate and, also, a polycarbonate having a higher molecular weight as compared with the conventional method can be produced with a higher yield and at a higher reaction rate.

Abstract: A resist material includes a base polymer containing a compound having a unit represented by a general formula of the following Chemical Formula 1: wherein R1, R2 and R3 are the same or different and are a hydrogen atom, a fluorine atom, a straight-chain alkyl group, a branched or cyclic alkyl group or a fluoridated alkyl group with a carbon number not less than 1 and not more than 20; R4 is a straight-chain alkylene group or a branched or cyclic alkylene group with a carbon number not less than 0 and not more than 20; R5 is a hydrogen atom, a straight-chain alkyl group, a branched or cyclic alkyl group or a fluoridated alkyl group with a carbon number not less than 1 and not more than 20, or a protecting group released by an acid; and R6 is a group having a cyclic ester compound, a group having an alicyclic compound including a hydroxyl group or a group having a compound including hexafluoroisopropyl alcohol.

Abstract: Provided is a polyfunctional compound which can be used as an optical recording material in which a large quantity of information data can be recorded optically at a high density, which can be used as an optical waveguide material using a refractive index difference occurring between a light-irradiated part and a part not irradiated with light, and which is capable of forming a film and can be used as a photo-alignment film material having excellent photosensitivity. The polyfunctional compound of the present invention includes a chemical structure represented by General Formula (1): where: R1 and R2 each independently represent any of H, CH3, and Cl; X1 to X3 each independently represent any of —O—, —NH—, and —N(alkyl)-; A1 to A3 each independently represent a divalent connecting group; and L1 to L3 each independently represent any of a photoisomerization group, a liquid-crystal group, and H, and at least one of L1 to L3 represents a photoisomerization group.

Abstract: Provided is an easy method for production of a high-performance polyfunctional compound which can be used as an optical recording material, an optical waveguide material, a photo-alignment film material, or the like, in a simple manner. The method for production of a polyfunctional compound includes conducting a Michael addition of a compound (A) having a hydrogen atom of pKa?15 to a (meth)acrylate or a (meth)acrylamide (B), in which at least one of the compounds (A) and (B) has a photoisomerization group and/or a liquid-crystalline group.

Abstract: A laminated ceramic electronic component includes a plurality of ceramic green sheets. In each of the ceramic green sheets, which are not backed with a carrier film, coil conductor patterns and lead-out electrodes are formed by a screen printing method and simultaneously a conductive paste is filled in holes for via holes to form via holes. The coil conductor patterns include first lands provided at one end of the coil conductor patterns so as to cover the via holes for connection between layers and second lands to be connected to the via holes provided at the other end of the conductive patterns. The second lands are larger in diameter than the first lands, such that the area of the second lands is about 1.10 to about 2.25 times as wide as the area of the first lands.

Abstract: A method of producing a copper-clad laminate by laminating a copper foil on a polyimide layer, wherein the polyimide layer is produced by imidating a polyamide acid which is obtained by reacting one of an aromatic diacid anhydride and alicyclic diacid anhydride and one of an aliphatic diamine and alicyclic diamine, with an acid having a pKa of 3 to 5.

Abstract: A method of preparing a poly(amic acid) includes a step of reacting an aromatic diacid anhydride or alicyclic diacid anhydride, an aliphatic diamine or alicyclic diamine, and an acid having a pKa of 3 to 5. A method of preparing a polyimide by imidating the resulting poly(amic acid) is also disclosed.

Abstract: A multilayer coil component is constructed such that inductance can be finely adjusted and the coupling between two helical coils can be strengthened without increasing the types of patterns of coil conductors. Coil conductors of a first coil unit are connected to each other in series via via-hole conductors so as to form a first helical coil. Coil conductors of a second coil unit are connected to each other in series via via-hole conductors so as to form a second helical coil. The first and second helical coils are coaxially positioned, have different numbers of turns, and are electrically connected to each other in parallel. The sum of turns of the coil conductors facing each other at a portion where the first coil unit and the second coil unit are adjacent to each other is larger than the sum of turns of the coil conductors positioned on both outer sides in the coil axis direction of the first and second helical coils.

Abstract: It is provided for a resin composition including (A) at least one polyamic acid having the structure represented by the following formula (1): wherein R1 is independently an alkyl group having 1 to 3 carbon atoms or a cyano group; a is independently an integer of 0 to 4; R is a tetravalent organic group; n is an integer of 1 to 4; and m is an integer of 1 to 100,000, and (E) an organic solvent.

Abstract: A base polymer of a resist material includes a unit represented by a general formula of the following Chemical Formula 3: wherein R1, R2 and R3 are the same or different and are a hydrogen atom, a fluorine atom, a straight-chain alkyl group, a branched or cyclic alkyl group or a fluoridated alkyl group with a carbon number not less than 1 and not more than 20; R4 is a straight-chain alkylene group or a branched or cyclic alkylene group with a carbon number not less than 0 and not more than 20; and R5 and R6 are the same or different and are a hydrogen atom, a straight-chain alkyl group, a branched or cyclic alkyl group, a fluoridated alkyl group with a carbon number not less than 1 and not more than 20, or a protecting group released by an acid.