Iron-nickel alloy material for shadow mask with excellent suitability for etching
AssigneeNippon Yakin Kogyo Co., Ltd.
InventorsNatsuki Shiga, Hidekazu Todoroki
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Abstract
The invention is a Fe—Ni alloy material comprising Ni: 26–37 wt %, Si: 0.001–0.2 wt %, Mn: 0.01–0.6 wt %, Al: 0.0001–0.003 wt %, Mg: not more than 0.001 wt %, Ca: not more than 0.001 wt % and the reminder being Fe and inevitable impurities, and containing not more than 0.02 wt % of one or more MnO—SiO2—Al2O3 inclusion, SiO2 inclusion and MgO—Al2O3 inclusion insoluble in an aqueous solution of ferric chloride, and is to provide electronic materials for shadow mask and the like having a good hole shape in an etching treatment and a high quality.
Claims20
A Fe—Ni alloy material for a shadow mask having an excellent etching workability, wherein the alloy material comprises, in % by weight:
- Ni from 26 to 37
- Si from 0.001 to 0.2
- Mn from 0.01 to 0.6
- Al from 0.0001 to 0.003
- Mg not more than 0.001
- Ca not more than 0.001,
- remainder Fe and inevitable impurities, the alloy material comprising at least two of the following inclusions (a) to (c) which are insoluble in an aqueous ferric chloride solution:
- (a) MnO—SiO2—Al2O3 comprising, by weight, from 25% to 50% of MnO, from 40% to 60% of SiO2 and from 5% to 30% of Al2O3, and wherein (CaO+MgO)≦30% by weight;
- (b) MgO—Al2O3 spinel comprising, by weight, from 5% to 45% of MgO and from 55% to 95% of Al2O3;
- (c) SiO2.
A Fe—Ni alloy material for a shadow mask having an excellent etching workability, wherein the alloy material comprises, in % by weight:
- Ni from 26 to 37
- Si from 0.001 to 0.2
- Mn from 0.01 to 0.6
- Al from 0.0001 to 0.003
- Mg not more than 0.001
- Ca not more than 0.001
- Nb from 0.01 to 1.0,
- remainder Fe and inevitable impurities, the alloy material comprising at least two of the following inclusions (a) to (c) which are insoluble in an aqueous ferric chloride solution:
- (a) MnO—SiO2—Al2O3 comprising, by weight, from 25% to 50% of MnO, from 40% to 60% of SiO2 and from 5% to 30% of Al2O3, and wherein (CaO+MgO)≦30% by weight;
- (b) MgO—Al2O3 spinel comprising, by weight, from 5% to 45% of MgO and from 55% to 95% of Al2O3;
- (c) SiO2.
A Fe—Ni alloy material for a shadow mask having an excellent etching workability, wherein the alloy material comprises, in % by weight:
- Ni from 26 to 37
- Si from 0.001 to 0.2
- Mn from 0.01 to 0.6
- Al from 0.0001 to 0.003
- Mg not more than 0.001
- Ca not more than 0.001
- Co from 1 to 8,
- remainder Fe and inevitable impurities, the alloy material comprising at least two of the following inclusions (a) to (c) which are insoluble in an aqueous ferric chloride solution:
- (a) MnO—SiO2—Al2O3 comprising, by weight, from 25% to 50% of MnO, from 40% to 60% of SiO2 and from 5% to 30% of Al2O3, and wherein (CaO+MgO)≦30% by weight;
- (b) MgO—Al2O3 spinel comprising, by weight, from 5% to 45% of MgO and from 55% to 95% of Al2O3;
- (c) SiO2.
A Fe—Ni alloy material for a shadow mask having an excellent etching workability, wherein the alloy material comprises, in % by weight:
- Ni from 26 to 37
- Si from 0.001 to 0.2
- Mn from 0.01 to 0.6
- Al from 0.0001 to 0.003
- Mg not more than 0.001
- Ca not more than 0.001
- Nb from 0.01 to 1.0
- Co from 1 to 8,
- remainder Fe and inevitable impurities, the alloy material comprising at least two of the following inclusions (a) to (c) which are insoluble in an aqueous ferric chloride solution:
- (a) MnO—SiO2—Al2O3 comprising, by weight, from 25% to 50% of MnO, from 40% to 60% of SiO2 and from 5% to 30% of Al2O3, and wherein (CaO+MgO)≦30% by weight;
- (b) MgO—Al2O3 spinel comprising, by weight, from 5% to 45% of MgO and from 55% to 95% of Al2O3;
- (c) SiO2.
Dependencies are inferred from the claim text.