Abstract: Provided are an inhibitor for RuO4 gas generation used in a manufacturing process of a semiconductor element, that inhibits a RuO4 gas generated when a semiconductor wafer containing ruthenium and a treatment liquid are brought into contact, and a method for inhibiting the RuO4 gas. Specifically, provided is an inhibitor for RuO4 gas generation for inhibiting a RuO4 gas generated when a semiconductor wafer containing ruthenium and a treatment liquid are brought into contact in semiconductor formation steps, wherein the inhibitor includes an onium salt consisting of an onium ion and a bromine-containing ion. Also provided is a method for inhibiting RuO4 gas generation by adding the inhibitor to a ruthenium treatment liquid or a ruthenium-containing liquid used in semiconductor formation steps.

Abstract: The present invention addresses the issue of providing a method for removing a transition metal oxide adhered to a transition metal film in a process for manufacturing a semiconductor element, and of providing a treatment liquid. Specifically, the present invention provides a method for treating a semiconductor of a transition metal, the method including, in a semiconductor formation process, a step of removing a transition metal oxide and a step of removing the transition metal. The present invention also provides a reducing agent-containing treatment liquid for a transition metal oxide, wherein the concentration of the reducing agent contained in the reducing agent-containing treatment liquid is 0.01 mass % or more and 50 mass % or less.

Abstract: To provide an optical glass having a high refractive index and a relatively low specific gravity, and an optical element. An optical glass which is a SiO2—TiO2—Nb2O5-based glass, and in which the content of SiO2 is 10% by mass or greater, the total content of Na2O, K2O, and Cs2O(Na2O+K2O+Cs2O) is 11.0% by mass or less, and the specific gravity and the refractive index nd thereof satisfy formula (1). nd?0.2×specific gravity+1.

Abstract: Provided is an optical glass, wherein, based on mass, an SiO2 content is 10.00% or more, a CaO content is 5.00% or more, a total content (La2O3+Gd2O3+Y2O3) of La2O3, Gd2O3 and Y2O3 is more than 0%, a total content (BaO+La2O3+Gd2O3+Y2O3) of BaO, La2O3, Gd2O3 and Y2O3 is 30.00% or less, and a mass ratio ((SiO2+B2O3)/(TiO2+Nb2O5+Ta2O5+WO3+Bi2O3)) of a total content of SiO2 and B2O3 relative to a total content of TiO2, Nb2O5, Ta2O5, WO3 and Bi2O3 is 0.75 or less.

Abstract: Provided is a glass which contains, by mass %, the following components: 20 to 35% of SiO2 and B2O3 in total, 50 to 70% of La2O3, Gd2O3, Y2O3 and Yb2O3 in total, 37 to 69% of La2O3, 0 to 3% of Gd2O3, 3 to 30% of Y2O3, 0% or more but less than 2% of Yb2O3, 2 to 15% of ZrO2, 1 to 6% of TiO2, Nb2O5 and Ta2O5 in total, 0 to 4% of ZnO, and 0 to 2% of WO3, wherein a mass ratio ZnO/Nb2O5 is in a range of 0 to 1.0 but Nb2O5 is contained as an essential component, a refractive index nd is in a range of 1.790 to 1.830, and an Abbe's number vd is in a range of 45 to 48.

Abstract: An optical glass that is oxide glass, containing Si4+, B3+, La3+, Ti4+, Nb5+, and Zr4+; containing, denoted as cation %, Si4+ and B3+ of 5 to 55% in total, La3+ of 10 to 50%, with a total content of La3+, Gd3+, Y3+ and Yb3+?70%, and Ti4+, Nb5+, Ta5+ and W6+ of 22 to 55% in total, with a content of Ti4+?22%, wherein [Si4+/(Si4++B3+)]?0.40; the total content of La3+, Gd3+, Y3+, Yb3+, Zr4+, Ti4+, Nb5+, Ta5+, W6+ and Bi3+?65%; [Y3+/(La3++Gd3++Y3++Yb3+)]?0.12; [Ba2+/(La3++Gd3++Y3++Yb3+)]?0.40; [(Zr4++Ti4++Nb5++Ta5++W6+)/Zr4+]?2; (Ti4+/B3+)?0.85; and an Abbé number ?d is in a range from 23 to 35, and a refractive index nd satisfies nd?2.205?(0.0062×?d).

Abstract: An optical glass is oxide glass wherein Si4++B3+ ranges from 10-60 cation %, La3++Gd3++Y3++Yb3+ ranges from 25-70 cation %, Ti4++Nb5++W6++Bi3+ ranges from 10-20 cation %, Li+ content ranges from 0-5.0 cation %, Ge content is lower than 5.0 mass % as quantity of GeO2 based on oxides, no Pb included, a cation ratio, Si4+/B3+, is equal or lower than 0.70, a cation ratio, (La3++Gd3++Y3++Yb3+)/(Ti4++Nb5++W6++Bi3+), ranges from 1.90-7.00, a cation ratio, Y3+/(La3++Gd3++Y3++Yb3+), is equal or lower than 0.180, and Nb5+ is an essential component, with Ti4+/Nb5+ being equal or lower than 4.00, with nd of higher than 1.920 and equal or lower than 2.000, vd ranging from 28.0-34.0, and yield point higher than 645° C., and a deviation ?Pg,F from normal line of partial dispersion ratio Pg,F being equal or lower than 0.0005.

Abstract: An optical glass that is oxide glass, containing Si4+, B3+, La3+, Ti4+, Nb5+, and Zr4+; containing, denoted as cation %, Si4+ and B3+ of 5 to 55% in total, La3+ of 10 to 50%, with a total content of La3+, Gd3+, Y3+ and Yb3+?70%, and Ti4+, Nb5+, Ta5+ and W6+ of 22 to 55% in total, with a content of Ti4+?22%, wherein [Si4+/(Si4++B3+)]?0.40; the total content of La3+, Gd3+, Y3+, Yb3+, Zr4+, Ti4+, Nb5+, Ta5+, W6+ and Bi3+?65%; [Y3+/(La3++Gd3++Y3++Yb3+)]?0.12; [Ba2+/(La3++Gd3++Y3++Yb3+)]?0.40; [(Zr4++Ti4++Nb5++Ta5++W6+)/Zr4+]?2; (Ti4+/B3+)?0.85; and an Abbé number ?d is in a range from 23 to 35, and a refractive index nd satisfies nd?2.205?(0.0062×?d).

Abstract: An aspect of the present invention relates to optical glass, which is oxide glass, having a refractive index nd ranging from 1.95 to 2.50 and an Abbé number ?d ranging from 18 to 40, including essential components in the form of Si4+, B3+, La3+, Ti4+, Nb5+, and at least one from among Gd3+, Y3+, and Yb3+, including, denoted as cation %, 1 to 30% of Si4+, 1 to 50% of B3+, wherein a total of Si4+ and B3+ ranges from 5 to 55%, a total of 11 to 70% of La3+, Gd3+, Y3+, and Yb3+, with 10 to 50% of La3+, a total of 23 to 70% of Ti4+, Nb5+, Ta5+, and W6+, with equal to or greater than 1% of Nb5+ and greater than 22% of Ti4+.

Abstract: Provided is a glass which contains, by mass %, the following components: 20 to 35% of SiO2 and B2O3 in total, 50 to 70% of La2O3, Gd2O3, Y2O3 and Yb2O3 in total, 37 to 69% of La2O3, 0 to 3% of Gd2O3, 3 to 30% of Y2O3, 0% or more but less than 2% of Yb2O3, 2 to 15% of ZrO2, 1 to 6% of TiO2, Nb2O5 and Ta2O5 in total, 0 to 4% of ZnO, and 0 to 2% of WO3, wherein a mass ratio ZnO/Nb2O5 is in a range of 0 to 1.0 but Nb2O5 is contained as an essential component, a refractive index nd is in a range of 1.790 to 1.830, and an Abbe's number vd is in a range of 45 to 48.

Abstract: The optical glass is described that may be an oxide glass including, denoted as cation %, a total of 5 to 60% of B3+ and Si4+ (with 5 to 50% of B3+), a total of equal to or higher than 5% of Zn2+ and Mg2+, a total of 10 to 50% of La3+, Gd3+, Y3+, and Yb3+, and a total of 6 to 45% of Ti4+, Nb5+, Ta5+, W6+, and Bi3+ (a total content of Ti4+ and Ta5+ being higher than 0% and a content of W6+ being higher than 5%).

Abstract: The optical glass is described that may be an oxide glass including, denoted as cation %, a total of 5 to 60% of B3+ and Si4+ (with 5 to 50% of B3+), a total of equal to or higher than 5% of Zn2+ and Mg2+, a total of 10 to 50% of La3+, Gd3+, Y3+, and Yb3+, and a total of 6 to 45% of Ti4+, Nb5+, Ta5+, W6+, and Bi3+ (a total content of Ti4+ and Ta5+ being higher than 0% and a content of W6+ being higher than 5%).

Abstract: An aspect of the present invention relates to optical glass, which is oxide glass, having a refractive index nd ranging from 1.95 to 2.50 and an Abbé number ?d ranging from 18 to 40, including essential components in the form of Si4+, B3+, La3+, Ti4+, Nb5+, and at least one from among Gd3+, Y3+, and Yb3+, including, denoted as cation %, 1 to 30% of Si4+, 1 to 50% of B3+, wherein a total of Si4+ and B3+ ranges from 5 to 55%, a total of 11 to 70% of La3+, Gd3+, Y3+, and Yb3+, with 10 to 50% of La3+, a total of 23 to 70% of Ti4+, Nb5+, Ta5+, and W6+, with equal to or greater than 1% of Nb5+ and greater than 22% of Ti4+.

Abstract: An optical glass is oxide glass wherein Si4++B3+ ranges from 10-60 cation %, La3++Gd3++Y3++Yb3+ ranges from 25-70 cation %, Ti4++Nb5++W6++Bi3+ ranges from 10-20 cation %, Li+ content ranges from 0-5.0 cation %, Ge content is lower than 5.0 mass % as quantity of GeO2 based on oxides, no Pb included, a cation ratio, Si4+/B3+, is equal or lower than 0.70, a cation ratio, (La3++Gd3++Y3++Yb3+)/(Ti4++Nb5++W6++Bi3+), ranges from 1.90-7.00, a cation ratio, Y3+/(La3++Gd3++Y3++Yb3+), is equal or lower than 0.180, and Nb5+ is an essential component, with Ti4+/Nb5+ being equal or lower than 4.00, with nd of higher than 1.920 and equal or lower than 2.000, vd ranging from 28.0-34.0, and yield point higher than 645° C., and a deviation ?Pg,F from normal line of partial dispersion ratio Pg,F being equal or lower than 0.0005.

Abstract: An aspect of the present invention relates to optical glass, which is oxide glass comprising various cationic components in prescribed amounts without Pb, with a refractive index nd of 1.750 to 1.850, an Abbé number ?d of 29.0 to 40.0, and a glass transition temperature of less than 630° C.

Abstract: An optical glass, comprising, denoted as cation percentages: a content of Si4+ and B3+ (35 to 55); a combined content of La3+, Gd3+, and Y3+ (30 to 55), wherein Gd3+ is 5 to 20%; a content of Ti4+, Nb5+, Ta5+ and W6+ (7 to 20); Zr4+ (2 to 8); and Zn2+ (0 to 10); wherein a cation ratio of Zn2+ to Gd3+ is 0 to 0.80; a cation ratio of Gd3+ to Ti4+, Nb5+, Ta5+, and W6+ combined is 0.65 to 2.00; a cation ratio of Ta5+ to Ti4+, Nb5+, Ta5+, and W6+ combined is 0 to 0.30; a cation ratio of Ti4+ to Ti4+, Nb5+, Ta5+, and W6+ combined is 0.30 to 0.90; and a refractive index nd is 1.890 to 1.950, and an Abbé number ?d of equal to or lower than 39.0, the Abbé number ?d satisfying a relation of ?d?(2.334?nd)/0.012 relative to nd.

Abstract: A high-refractivity low-dispersion optical glass that can be stably supplied and has excellent glass stability and that has coloring reduced, composed of in mass %, 5 to 32% of total of SiO2 and B2O2, 45 to 65% of total of La2O2, Gd2O2 and Y2O2, 0.5 to 10% of ZnO, 1 to 20% of total of TiO2 and Nb2O5, and optionally other components. The optical glass has a refractive index nd of 1.89 to 2.0, an Abbe's number ?d of 32 to 38 and a coloring degree ?70 of 430 nm or less.

Abstract: An optical glass having high-refractivity and low-dispersion properties and containing, by mol %, 0.1 to 40% of SiO2, 10 to 50% of B2O3, wherein the mass ratio of the content of SiO2 to the content of B2O3, SiO2/B2O3, is 1 or less, 0.5 to 22% of ZnO, 5 to 50% of La2O3, and optionally other ingredients. The optical glass has a refractive index nd of 1.86 to 1.95 and an Abbe's number ?d of (2.36?nd)/0.014 or more but less than 38, and a glass transition temperature of equal to or greater than 640° C.

Abstract: An optical glass that is an oxide glass having a very high refractive index in spite of its low-dispersion property, having excellent glass stability and having less susceptibility to coloring.

Abstract: A process for producing a glass in the production of a glass molded article formed of an optical glass by melting and clarifying a glass raw material to prepare a molten glass and molding said molten glass, the process comprising preparing a glass raw material that gives an oxide glass comprising, by cationic %, 12 to 65% of B3+, 0 to 20% of Si4+, 0 to 6% of Ge4+, 15 to 50% of total of La3+, Gd3+, Y3+, Yb3+, Sc3+ and Lu3+, 4 to 54% of total of Ta5+, Zr4+, Ti4+, Nb5+, W6+ and Bi3+, 0 to 35% of Zn2+, 0 to 9% of total of Li+, Na+ and K+, and 0 to 15% of total of Mg2+, Ca2+, Sr2+ and Ba2+, a total content of said cationic components in the oxide glass being 99 to 100%, and said glass raw material comprising carbonate and sulfate.