Abstract:
Blue-emitting phosphorescent compounds show high solubility in solvents for coating solutions in the production of organic EL devices and have excellent thermal stability. Organic EL devices having the blue-emitting phosphorescent compounds have high luminous efficiency and long life. A blue-emitting phosphorescent compound is an iridium complex compound represented by Formula (1) below: wherein R1 is a C2-30 organic group; R2 to R4 are each independently a hydrogen atom or a C1-10 alkyl group; R5 to R8 are each independently an electron-withdrawing group selected from the group consisting of halogen atoms, C1-10 fluorine-substituted alkyl groups, C1-10 fluorine-substituted alkoxy groups, cyano group, aldehyde group, C2-10 acyl groups, C2-10 alkoxycarbonyl groups, C1-10 aminocarbonyl groups, thiocyanate group and C1-10 sulfonyl groups, a C1-10 organic group optionally having a heteroatom (except the electron-withdrawing groups) or a hydrogen atom; and at least one of R5 to R8 is the electron-withdrawing group.
Abstract:
The present invention relates to a phosphorescent polymer compound comprising a phosphorescent monomer unit and a hole transporting monomer unit having a triphenylamine structure represented by the formula (1): (in the formula, the symbols have the same meanings as defined in the Description), and an organic light emitting device using the compound. Use of the phosphorescent polymer compound of the present invention enables production of organic light emitting device with a high light emitting efficiency at a low voltage, which is suitable for increasing the emission area and mass production.
Abstract:
The present invention relates to a phosphorescent polymer compound comprising a phosphorescent monomer unit and a hole transporting monomer unit having a triphenylamine structure represented by the formula (1): (in the formula, the symbols have the same meanings as defined in the Description), and an organic light emitting device using the compound. Use of the phosphorescent polymer compound of the present invention enables production of organic light emitting device with a high light emitting efficiency at a low voltage, which is suitable for increasing the emission area and mass production.
Abstract:
The present invention relates to a phosphorescent polymer compound comprising a phosphorescent monomer unit and a hole transporting monomer unit having a triphenylamine structure represented by the formula (1): (in the formula, the symbols have the same meanings as defined in the Description), and an organic light emitting device using the compound. Use of the phosphorescent polymer compound of the present invention enables production of organic light emitting device with a high light emitting efficiency at a low voltage, which is suitable for increasing the emission area and mass production.
Abstract:
Solder powder contains solder particles of up to 20 mu m particle size in an amount of up to 30% based on the number of particles. Independent claims are also included for the following: (A) a flux for a solder paste including an organic acid component comprising an organic acid ester and an ester decomposition catalyst, an organic halide and a reducing agent; (B) a solder paste having a water content of up to 0.5 wt.% which consists of the flux and a solder powder; (C) a method of soldering circuit boards including the process of coating the solder paste on top of the circuit board and reflowing the solder paste; (D) the circuit board; and (E) the soldered junction product.
Abstract:
An object of the present invention is to provide a fluorinated polymer of adequate molecular weight with excellent transparency in a wavelength range from visible to near infrared, and to also provide a method of producing such a polymer. The present invention provides a fluorinated polymer comprising a structure represented by a formula (1) as a structural unit, as well as a method of producing this polymer using a corresponding tetrafluoroxylylenediamine or a tetrafluoroxylylene glycol as a raw material.
Abstract:
An object of the present invention is to provide a fluorinated polymer of adequate molecular weight with excellent transparency in a wavelength range from visible to near infrared, and to also provide a method of producing such a polymer. The present invention provides a fluorinated polymer comprising a structure represented by a formula (1) as a structural unit, as well as a method of producing this polymer using a corresponding tetrafluoroxylylenediamine or a tetrafluoroxylylene glycol as a raw material.
Abstract:
A solder powder, flux and solder paste which have excellent storage stability and reflow characteristics as well as a soldering method, a circuit board, a method for junction of electronic parts and a junction product which are ready for employment of a finer pitch and diversification of parts are provided. Use is made of a solder powder having a content of particles having a size of 20 mu m or less of 30 % or less in terms of the number of particles and having a oxygen content of 500 ppm or less. Or use is made of a flux which is comprised of an organic acid component comprising an organic acid ester and an ester decomposition catalyst, an organic halide, a reducing agent and a pH adjusting agent. Or a solder paste containing the aforementioned flux and solder powder has a water content of 0.5 wt.% or less.
Abstract:
A solder powder, flux and solder paste which have excellent storage stability and reflow characteristics as well as a soldering method, a circuit board, a method for junction of electronic parts and a junction product which are ready for employment of a finer pitch and diversification of parts are provided. Use is made of a solder powder having a content of particles having a size of 20 mu m or less of 30 % or less in terms of the number of particles and having a oxygen content of 500 ppm or less. Or use is made of a flux which is comprised of an organic acid component comprising an organic acid ester and an ester decomposition catalyst, an organic halide, a reducing agent and a pH adjusting agent. Or a solder paste containing the aforementioned flux and solder powder has a water content of 0.5 wt.% or less.