Abstract: A method for producing an optical waveguide composing an optical path conversion component having an extremely low signal loss, allowing a high surface packaging density and high speed operation, and allowing high productivity. A method for producing an optical waveguide that propagates light from a surface of a support to an oblique direction not vertical to the surface, the method for producing an optical waveguide comprising the steps of: (1) providing an anti-reflective coating on the support; (2) placing a photosensitive resin composition on the anti-reflective coating, and exposing the photosensitive resin composition to a light ray entering from a direction non-vertical to the surface of the support through a photomask for curing the composition; and (3) removing the unexposed photosensitive resin composition by development; and an optical waveguide obtained by the method.

Abstract: A method for producing an optical waveguide composing an optical path conversion component having an extremely low signal loss, allowing a high surface packaging density and high speed operation, and allowing high productivity. A method for producing an optical waveguide that propagates light from a surface of a support to an oblique direction not vertical to the surface, the method for producing an optical waveguide comprising the steps of: (1) providing an anti-reflective coating on the support; (2) placing a photosensitive resin composition on the anti-reflective coating, and exposing the photosensitive resin composition to a light ray entering from a direction non-vertical to the surface of the support through a photomask for curing the composition; and (3) removing the unexposed photosensitive resin composition by development; and an optical waveguide obtained by the method.

Abstract: The present invention provides a novel diamine which is especially useful as a material for a resin for a liquid crystal alignment film, a polyimide precursor and a polyimide synthesized by using the diamine, and a treating agent for liquid crystal alignment containing such a polymer, which gives a liquid crystal alignment film having a high pretilt angle of liquid crystal, excellent thermal stability of the pretilt angle and small dependence of the pretilt angle on rubbing pressure. A diaminobenzene derivative represented by the formula (1): wherein X1 and X2 are cyclic groups, and X3 is selected from an alkyl group, an alkoxy group, a fluoroalkyl group, a fluoroalkoxy group, a fluorine atom, a chlorine atom, a bromine atom and a cyano group; a polyimide precursor and a polyimide synthesized by using the diaminobenzene derivative as a part of the material; and a treating agent for liquid crystal alignment containing at least one of the polymers.

Abstract: A diamine compound represented by the formula (1): wherein R1 is a trivalent organic group, each of X1 and X2 is a bivalent organic group, X3 is an alkyl or fluoroalkyl group having from 1 to 22 carbon atoms, or a cyclic substituent selected from aromatic rings, aliphatic rings, heterocyclic rings and their substituted groups, and n is an integer of from 2 to 5. And, a polyimide precursor and a polyimide synthesized by using the diamine compound; and a treating agent for liquid crystal alignment containing the polyimide precursor and/or the polyimide.

Abstract: The present invention provides a novel diamine which is especially useful as a material for a resin for a liquid crystal alignment film, a polyimide precursor and a polyimide synthesized by using the diamine, and a treating agent for liquid crystal alignment containing such a polymer, which gives a liquid crystal alignment film having a high pretilt angle of liquid crystal, excellent thermal stability of the pretilt angle and small dependence of the pretilt angle on rubbing pressure. A diaminobenzene derivative represented by the formula (1): wherein X1 and X2 are cyclic groups, and X3 is selected from an alkyl group, an alkoxy group, a fluoroalkyl group, a fluoroalkoxy group, a fluorine atom, a chlorine atom, a bromine atom and a cyano group; a polyimide precursor and a polyimide synthesized by using the diaminobenzene derivative as a part of the material; and a treating agent for liquid crystal alignment containing at least one of the polymers.

Abstract: A liquid crystal alignment treating agent for optical alignment treatment, whereby it is possible to obtain a liquid crystal alignment film which presents a high and stable tilt angle of liquid crystal and which is excellent in an accumulated charge property by a DC voltage, is provided.

Abstract: A liquid crystal alignment treating agent for optical alignment treatment, whereby it is possible to obtain a liquid crystal alignment film which presents a high and stable tilt angle of liquid crystal and which is excellent in an accumulated charge property by a DC voltage, is provided.

Abstract: An alkyldiamine having excellent polymerization reactivity, a polyimide comprising it as a constituting element, and a liquid crystal alignment film excellent in uniformity of liquid crystal alignment, are presented. Namely, the present invention relates to a diaminobenzene derivative represented by the following general formula (1) and to a polyimide obtained by reacting a diamine containing at least 1 mol % of the diaminobenzene derivative represented by the general formula (1), with at least one compound selected from a tetracarboxylic. dianhydride and its derivatives, to obtain a polyimide. precursor having a reduced viscosity of from 0.05 to 5.0 dl/g (in N-methylpyrrolidone at a temperature of 30° C., concentration: 0.5 g/dl) and ring-closing it, and having a repeating unit represented by the general formula (2). Further, the present invention relates to a liquid crystal alignment film containing at least 1 mol % of the above repeating unit.

Abstract: A diamine compound represented by the formula (1): 1

Abstract: A diaminobenzene derivative represented by the formula (1): 1

Abstract: The present invention relates to a treating agent for liquid crystal alignment, which comprises a polyamic acid compound having a reduced viscosity of from 0.05 to 5.0 dl/g (in N-methylpyrrolidone at a temperature of 30° C. at a concentration of 0.5 g/dl) and containing repeating units represented by the general formula [I]: (wherein R1 is a tetravalent organic group constituting a tetracarboxylic acid which has an alicyclic structure having from 2 to 5 rings condensed and wherein all the carbonyl groups are directly bonded to the alicyclic structure and said carbonyl groups are not bonded to adjacent carbon atoms in the alicyclic structure, and R2 is a bivalent organic group constituting a diamine), or a polyimide resin obtained by imidizing said polyamic acid compound, and a liquid crystal alignment film and a liquid crystal device employing it.

Abstract: A diaminobenzene derivative represented by formula (1), and a polyimide obtained by reacting a diamine containing at least 1 mol % of said diaminobenzene derivative, with a tetracarboxylic acid and its derivatives to obtain a polyimide precursor and ring-closing it, having a repeating unit represented by formula (2), and a liquid crystal alignment film containing said polyimide. ##STR1## P is a single bond or --O--, --COO--, or --CONH--, Q is a cyclic substituent selected from an aromatic ring, an aliphatic ring, a hetero ring and their substitution products, R.sup.1 is an aliphatic ring, and R.sup.2 is C.sub.1-22 straight chain alkyl group, A is a tetravalent organic group constituting a tetracarboxylic acid, B is a bivalent organic group constituting a diamine.