Abstract: The present invention provides a liquid resin composition for electronic components, which is excellent in migration resistance and also superior in formability and reliability, as well as an electronic component device sealed therewith, and relates to a liquid resin composition for electronic components, which comprises (A) an epoxy resin, (B) a cyclic acid anhydride which is liquid at ordinary temperature and has an acid anhydride equivalent of 200 or more, and (C) a coupling agent.

Abstract: The present invention provides a liquid resin composition for electronic components, which is excellent in migration resistance and also superior in formability and reliability, as well as an electronic component device sealed therewith, and relates to a liquid resin composition for electronic components, which comprises (A) an epoxy resin, (B) a cyclic acid anhydride which is liquid at ordinary temperature and has an acid anhydride equivalent of 200 or more, and (C) a coupling agent.

Abstract: An optical recording medium containing one or more compounds selected from imide compounds having a metallocene residue in a recording layer and an imide compound represented by a general formula (1): wherein a ring AR represents a substituted or unsubstituted aromatic ring residue or a residue formed by combining two or more aromatic ring residues via one or more linking groups; n represents the number of imide groups bonded to the ring AR; Am represents any one of substituents A1 to An bonded to a nitrogen atom of each imide group; and m represents an integer of from 1 to n, with the proviso that at least one substituent selected from the group consisting of A1 to An is one having at least one substituted or unsubstituted metallocene residue.

Abstract: An optical recording medium containing one or more compounds selected from imide compounds having a metallocene residue in a recording layer and an imide compound represented by a general formula (1): wherein a ring AR represents a substituted or unsubstituted aromatic ring residue or a residue formed by combining two or more aromatic ring residues via one or more linking groups; n represents the number of imide groups bonded to the ring AR; Am represents any one of substituents A1 to An bonded to a nitrogen atom of each imide group; and m represents an integer of from 1 to n, with the proviso that at least one substituent selected from the group consisting of A1 to An is one having at least one substituted or unsubstituted metallocene residue.

Abstract: An optical recording medium having an organic dye layer as a recording layer on a substrate, wherein at least one benzobisazole-based compound represented by a general formula (1) is contained in the recording layer: (wherein substituents X and Y each independently represent an aryl group or a heteroaryl group, rings A and B each independently represent an oxazole ring or a thiazole ring, and Q1 and Q2 each independently represent a hydrogen atom, a halogen atom or an alkyl group, with a proviso that, aryl group(s) or heteroaryl group(s) represented by the substituents X and Y each independently may be substituted by a halogen atom, a hydroxyl group, a cyano group, an amino group or a substituted or unsubstituted alkyl, aralkyl, aryl, alkenyl, alkoxy, aralkyloxy, aryloxy, alkenyloxy, alkylthio, aralkylthio, arylthio, alkenylthio, mono-substituted amino, di-substituted amino, acyl, alkoxycarbonyl, aralkyloxycarbonyl, aryloxycarbonyl, alkenyloxycarbonyl, mono-substituted aminocarbonyl, di-substituted aminoc

Abstract: A rewritable optical information recording medium including a recording layer composed of an organic dye film is provided, in which recording and erasing information can be performed reversibly by laser light irradiation. A rewritable optical information recording medium including at least one organic dye film which is substantially made of only at least one kind of organic dye compounds as a recording film is provided. The recording and erasure of information are performed by a reversible physical change of the organic dye film substance caused by laser light irradiation.

Abstract: An optical recording medium having a recording layer which contains at least one compound selected from the group consisting of mono-, di-, and triazaporphyrin compounds optionally in the form of a metal complex; or an optical recording medium comprising a substrate and formed thereon at least a recording layer containing an organic dye as a main component, characterized in that the organic dye has a first maximum value of absorption at a wavelength ?1 of 400 nm or less in the absorption spectrum and has a second maximum value of absorption at a longer-wavelength side than the ?1, and a wavelength band wherein the refractive index (n) and the absorption coefficient (k) of the above organic dye satisfy n?1.90 and 0.03?k?0.30.

Abstract: An optical recording medium containing one or more compounds selected from imide compounds having a metallocene residue in a recording layer and an imide compound represented by a general formula (1): wherein a ring AR represents a substituted or unsubstituted aromatic ring residue or a residue formed by combining two or more aromatic ring residues via one or more linking groups; n represents the number of imide groups bonded to the ring AR; Am represents any one of substituents A1 to An bonded to a nitrogen atom of each imide group; and m represents an integer of from 1 to n, with the proviso that at least one substituent selected from the group consisting of A1 to An is one having at least one substituted or unsubstituted metallocene residue.

Abstract: An optical recording medium having a recording layer which contains at least one compound selected from the group consisting of mono-, di-, and triazaporphyrin compounds optionally in the form of a metal complex; or an optical recording medium comprising a substrate and formed thereon at least a recording layer containing an organic dye as a main component, characterized in that the organic dye has a first maximum value of absorption at a wavelength &lgr;1 of 400 nm or less in the absorption spectrum and has a second maximum value of absorption at a longer-wavelength side than the &lgr;1, and a wavelength band wherein the refractive index (n) and the absorption coefficient (k) of the above organic dye satisfy n≧1.90 and 0.03≦k≦0.30.

Abstract: A recordable optical recording medium of this invention capable of good recording and reproduction with a laser at wavelengths of 300 to 500 nm and/or 500 to 700 nm comprises at least one porphycene compounds optionally chelated with a metal in its recording layer.

Abstract: An optical recording medium having an organic dye layer as a recording layer on a substrate, wherein at least one benzobisazole-based compound represented by a general formula (1) is contained in the recording layer: 1

Abstract: An optical recording medium comprising at least a recording layer and a reflecting layer on a substrate wherein the recording layer contains at least one dipyrromethene-metal chelate compound represented by general formula (1): wherein R1 to R6 independently represent hydrogen, halogen, nitro, cyano, hydroxyl, amino, carboxyl, sulfo, substituted or unsubstituted alkyl with up to 20 carbon atoms, alkoxy, alkylthio, aryloxy, arylthio, alkenyl, acyl, alkoxycarbonyl, carbamoyl, acylamino, aralkyl, aryl or heteroaryl; R7 represents halogen, aryl, heteroaryl, alkoxy, alkylthio, aryloxy or arylthio; A represents substituted or unsubstituted aromatic or heterocyclic ring with up to 20 carbon atoms; L1 represents substituted or unsubstituted bivalent residue forming a ring together with carbon atoms to which it attaches and optionally containing a hetero atom; and M1 represents transition metal element.

Abstract: An optical recording medium comprising at least a recording layer and a reflecting layer on a substrate wherein the recording layer contains at least one dipyrromethene-metal chelate compound represented by general formula (1): 1

Abstract: A novel optical recording medium having at least a recording layer and a reflective layer on a substrate is herein disclosed, wherein at least one dipyrromethene metal chelate compound represented by formula (1) is contained in the recording layer: wherein R1 and R9 are each independently an alkenyl group, an aryl group or a heteroaryl group; R2 to R8 are each independently a hydrogen atom, a halogen atom, or a substituted or unsubstituted alkyl, alkoxy, alkenyl, acyl, alkoxycarbonyl, aralkyl, aryl or heteroaryl group having 20 or less carbon atoms; and M is a transition metal.

Abstract: A novel optical recording medium having at least a recording layer and a reflective layer on a substrate is herein disclosed, wherein at least one dipyrromethene metal chelate compound represented by formula (1) is contained in the recording layer: ##STR1## wherein R.sub.1 and R.sub.9 are each independently an alkenyl group, an aryl group or a heteroaryl group; R.sub.2 to R.sub.8 are each independently a hydrogen atom, a halogen atom, or a substituted or unsubstituted alkyl, alkoxy, alkenyl, acyl, alkoxycarbonyl, aralkyl, aryl or heteroaryl group having 20 or less carbon atoms; and M is a transition metal.

Abstract: A visible light curable resin composition containing a photocurable resin, a photoreaction initiator and a photosensitizer having the formula (1). The composition has a very high sensitivity to a general-purpose visible light laser, so that a high-speed scanning exposure is possible by the laser, and an extremely fine high resolution can be obtained. In addition, the composition can be used for coating or printing under safelight irradiating conditions and under bright circumstantial conditions without any thickening of the composition, and hence the composition can exert excellent noticeable effects in points of safe operativity, operational efficiency and the stability of products. Formula (1) is as follows: ##STR1## wherein rings X.sub.1 and X.sub.2 are each an optionally substituted pyrrole ring; Y is H, CN, optionally substituted alkyl, aralkyl, aryl, heteroaryl or alkenyl group; and Z.sub.1 and Z.sub.

Abstract: An optical recording medium having at least a recording layer and a reflective layer on a substrates, the said recording layer contains a dipyrromethene metal chelate compound obtained from a dipyrromethene compound represented by the general formula (1) and a metal ion: ##STR1## wherein R.sup.1 to R.sup.7 are defined in the specification.

Abstract: An optical recording medium having at least a recording layer and a reflective layer on a substrate. The recording layer contains a dipyrromethene metal chelate compound obtained from a dipyrromethene compound represented by the general formula (1) and a metal ion: ##STR1## wherein R.sup.1 to R.sup.7 are defined in the specification.