Central Glass Company Limited patents

Dry etching gas and dry etching method

What is disclosed is a dry etching gas containing 1,3,3,3-tetrafluoropropene, wherein 1,3,3,3-tetrafluoropropene has purity of 99.5 mass % or more, and a total of concentration of each mixed metal component of Fe, Ni, Cr, Al, and Mo is 500 mass ppb or less. Furthermore, regarding to the dry etching gas,... Central Glass Company Limited

Electrolytic solution for nonaqueous electrolytic solution secondary batteries and nonaqueous electrolytic solution secondary battery

is... Central Glass Company Limited

Practical processes for producing fluorinated alpha-ketocarboxylic esters and analogues thereof

It is possible to produce a fluorine-containing α-ketocarboxylic ester hydrate by reacting a fluorine-containing α-hydroxycarboxylic ester with sodium hypochlorite or calcium hypochlorite of 21 mass % or greater in mass percentage of composition. Furthermore, it is possible to produce a fluorine-containing α-ketocarboxylic ester by reacting the hydrate with a dehydrating... Central Glass Company Limited

Practical manufacturing 3,3-difluoro-2-hydroxypropionic acid

Disclosed is a practical method for production of 3,3-difluoro-2-hydroxypropionic acid, which is important as pharmaceutical and agrichemical intermediates. The method includes forming a 4,4-difluoro-2,2-dichloro-3-oxobutanoic acid ester by reaction of a 4,4-difluoro-3-oxobutanoic acid ester with chlorine (Cl2), forming 3,3-difluoro-1,1-dichloro-2-propanone by reaction of the chlorination product with an acid, and then, reacting... Central Glass Company Limited

Lead-free glass and sealing material

What is disclosed is a lead-free glass, which is a V2O5—TeO2—RO (at least one selected from the group consisting of MgO, CaO, SrO, and BaO)—ZnO glass and has a low softening point, comprising: 5-55 wt % of V2O5, 5-75 wt % of TeO2, 1-25 wt % of RO (at least... Central Glass Company Limited

Manufacturing lithium difluorophosphate powder, and lithium difluorophosphate

To provide a manufacturing method with which lithium difluorophosphate powder can be recovered from a lithium difluorophosphate solution. A method for manufacturing lithium difluorophosphate powder is used which includes the steps of precipitating solid lithium difluorophosphate by adding a poor solvent to a solution in which lithium difluorophosphate is dissolved... Central Glass Company Limited

Azeotropic composition having fluorine-containing olefin as constituent

A liquid composition according to one embodiment of the present invention contains 0.0001 mol % to 40 mol % (Z)-1,2-dichloro-3,3,3-trifluoropropene (1223Z) and 99.9999 mol % to 60 mol % (E)-1,2-dichloro-ethylene (t-DCE). The liquid composition has less influence on the global environment and azeotropic (or azeotrope-like) properties. There occurs practically no... Central Glass Company Limited

Electrolyte for non-aqueous electrolyte battery and non-aqueous electrolyte lithium battery

An electrolyte for a non-aqueous electrolyte battery includes a non-aqueous organic solvent and at least lithium hexafluorophosphate as a solute, characterized by further including 10 to 1000 mass ppm of a phosphorus-containing acidic compound and 0.01 to 10.0 mass % of a difluorophosphate. The phosphorus-containing acidic compound is preferably at... Central Glass Company Limited

Method for cleaning wafer, and chemical used in such cleaning method

wherein the diluting solvent contains 80 to 100 mass % of alcohol with respect to the total 100 mass % of the diluting solvent.... Central Glass Company Limited

Antiglare glass sheet article for display device and manufacturing same

Disclosed herein is an antiglare glass sheet article for display devices in which at least one main surface of the glass sheet is roughened. The article has a roughened surface that includes: a surface with continuous irregularities having an arithmetic average roughness (Ra) of 0.01 to 0.1 μm, and an... Central Glass Company Limited

Curable silicone resin composition, cured object obtained therefrom, and optical semiconductor device formed using same

A curable silicone resin composition according to the present invention includes at least the following components: (A) a silicone resin having a hydrogen atom bonded to silicon atom (as SiH group); (B) a silicone resin having a vinyl group bonded to silicon atom (as Si—CH═CH2 group); and (C) a platinum... Central Glass Company Limited

Azeotropic like composition containing 2-chloro-1,3,3,3-tetrafluoropropene and 1-chloro-3,3,3-trifluoropropene

An azeotropic-like composition containing 2-chloro-1,3,3,3-tetrafluoropropene and 1-chloro-3,3,3-trifluoropropene is provided. The azeotropic-like composition according to the present invention is non-flammable, has little influence on the environment, and has substantially the same composition ratio in the liquid phase and the gas phase. By use of an azeotropic-like composition according to the present... Central Glass Company Limited

Ionic complex, electrolyte for nonaqueous electrolyte battery, nonaqueous electrolyte battery and ionic complex synthesis method

To provide a material suitable for a nonaqueous electrolyte battery having high-temperature durability. An ionic complex of the present invention is represented by any of the following formulae (1) to (3). For example, in the formula (1), A is a metal ion, a proton, or an onium ion; M is... Central Glass Company Limited

Method for improving preservation stability of 2,2-difluoroacetoaldehyde

A method for improving preservation stability of 2,2-difluoroacetaldehyde according to the present invention include at least: a first step of forming a “2,2-difluoroacetaldehyde-alcohol composite system” in which a 2,2-difluoroacetaldehyde hemiacetal coexists with an excess alcohol, wherein the total molar amount of the alcohol is 1.15 to 4.00 times the total... Central Glass Company Limited

Method for removing adhering matter and dry etching method

An etching fault is suppressed by use of an etching gas containing iodine heptafluoride. Provided is an attached substance removing method of removing an attached substance containing an iodine oxide attached to a component included in a chamber or a surface of a pipe connected with the chamber by use... Central Glass Company Limited

Method for producing trans-1-chloro-3,3,3-trifluoropropene

A method for producing 1-chloro-3,3,3-trifluoropropene efficiently from an intermediate product having a low reactivity is provided. A method for producing trans-1-chloro-3,3,3-trifluoropropene comprising reacting a halogenated hydrocarbon compound having 3 carbon atoms represented by Formula (1) shown below in a gas phase with hydrogen fluoride in the presence of chlorine is... Central Glass Company Limited

Fluorine-containing polymerizable monomer and polymer compound using same

The thus-obtained polymer compound combines adequate hydrophilicity and high transparency with low water adsorption of fluorine-containing compound.... Central Glass Company Limited

Dry etching method and dry etching agent

A dry etching method provided to involve the steps of: (a) disposing a substrate within a chamber, the substrate having an amorphous carbon film; (b) preparing a plasma gas by converting a dry etching agent into a plasma, the dry etching agent containing at least oxygen and alkylsilane; and (c)... Central Glass Company Limited

Method of preparing liquid chemical for forming protective film

a mixing step for mixing the nonaqueous organic solvent, the silylation agent, and the acid or base after the dehydrating step.... Central Glass Company Limited

Liquid chemical for forming protecting film

Disclosed is a liquid chemical for forming a water-repellent protecting film on a wafer. The liquid chemical is a liquid chemical containing a water-repellent-protecting-film-forming agent for forming the water-repellent protecting film, at the time of cleaning the wafer which has a finely uneven pattern at its surface and contains at... Central Glass Company Limited