Low-melting glass for covering substrate
AssigneeCentral Glass Company, Limited
InventorsNaoya Hayakawa, Kazuhiro Nishikawa
Life of this patent
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Abstract
A transparent, electric insulating, low-melting glass for covering a substrate includes chemical components of SiO2, B2O3, BaO and ZnO. This low-melting glass has a thermal expansion coefficient of from 65×10−7/° C. to 95×10−7/° C. within a range of 30-300° C.; a softening point of not higher than 600° C.; and a dielectric constant of not greater than 7.5 at a frequency of 1 MHz under room temperature.
Claims16
A transparent, electric insulating, low-melting glass for covering a substrate, said glass comprising:
- SiO2, B2O3, BaO and ZnO;
- and
- having a thermal expansion coefficient of from 65×10−7/° C. to 95×10−7/° C. within a range of 30-300° C.;
- having a softening point of not higher than 600° C.;
- and
- having a dielectric constant of not greater than 7.5 at a frequency of 1 MHz under room temperature,
- wherein said glass comprises 20-35 wt % of said B2O3 and 16-35 wt % of said BaO.
A transparent, electric insulating, low-melting glass for covering a substrate, said glass comprising:
- SiO2, B2O3, BaO and ZnO, said glass includes 0.1-10 wt % of said SiO2, 20-35 wt % of said B2O3, 25-55 wt % of said ZnO and 15-50 wt % of a total of said BaO and RO, wherein RO represents at least one of MgO, CaO and SrO, said glass being substantially free of PbO, Bi2O3 and alkali metal oxide;
- and
- having a thermal expansion coefficient of from 65×10−7/° C. to 95×10−7/° C. within a range of 30-300° C.;
- having a softening point of not higher than 600° C.;
- and
- having a dielectric constant of not greater than 7.5 at a frequency of 1 MHz under room temperature,
- wherein said glass covers an element disposed on the substrate that is used for a display panel, said element comprising at least one of a transparent electrode pattern made of an oxide and a bus electrode pattern, and further wherein, when said element comprises said transparent electrode pattern, said glass also comprises 0.5-5 wt % of said oxide.
A transparent, electric insulating, low-melting glass for covering a substrate, said glass comprising:
- SiO2, B2O3, BaO and ZnO, said includes 0.1-10 wt % of said SiO2, 20-35 wt % of said B2O3, 25-55 wt % of said ZnO and 15-50 wt % of a total of said BaO and RO, wherein RO represents at least one of MgO, CaO and SrO, said glass being substantially free of PbO, Bi2O3 and alkali metal oxide;
- and
- having a thermal expansion coefficient of from 65×10−7/° C. to 95×10−7/° C. within a range of 30-300° C.;
- having a softening point of not higher than 600° C.;
- and
- having a dielectric constant of not greater than 7.5 at a frequency of 1 MHz under room temperature,
- wherein said glass covers an element disposed on the substrate that is used for a display panel, said element comprising at least one of a transparent electrode pattern and a bus electrode pattern made of metal, and further wherein, when said element comprises said bus electrode pattern, said glass also comprises 0.1-1.5 wt % of an oxide of said metal.
A transparent, electric insulating, low-melting glass for covering a substrate, said glass comprising:
- SiO2, B2O3, BaO and ZnO, said glass includes 0.1-10 wt % of said SiO2, 20-35 wt % of said B2O3, 25-55 wt % of a total of said ZnO and 15-50 wt % of a total of said BaO and RO, wherein RO represents at least one of MgO, CaO and SrO, said glass being substantially free of PbO, Bi2O3 and alkali metal oxide;
- and
- having a thermal expansion coefficient of from 65×10−7/° C. to 95×10−7/° C. within a range of 30-300° C.;
- having a softening point of not higher than 600° C.;
- and
- having a dielectric constant of not greater than 7.5 at a frequency of 1 MHz under room temperature,
- wherein said glass covers an element disposed on the substrate that is used for a display panel, said element comprising at least one of a transparent electrode pattern made of an oxide and a bus electrode pattern made of a metal, and further wherein, when said element comprises said transparent electrode pattern, and said bus electrode pattern said glass also comprises 0.5-5 wt % of said oxide and 0.1-1.5 wt % of an oxide of said metal.
A transparent, electric insulating, low-melting glass for covering a substrate, said glass comprising:
- SiO2, B2O3, BaO and ZnO;
- and
- having a thermal expansion coefficient of from 75×10−7/° C. to 85×10−7/° C. within a range of 30-300° C.;
- having a softening point of not higher than 600° C.;
- and
- having a dielectric constant of not greater than 7 at a frequency of 1 MHz under room temperature,
- wherein said glass comprises 20-30 wt % of said B2O3, 34-43 wt % of said ZnO, and 30-37 wt % of said BaO.
A laminate comprising:
- (a) a substrate;
- and
- (b) a film covering said substrate, said film comprising a transparent, electric insulating, low-melting glass, said glass comprising:
- (1) SiO2, B2O3, BaO and ZnO;
- and
- (2) having a thermal expansion coefficient of from 65×10−7/° C. to 95×10−7/° C. within a range of 30-300° C.;
- (3) having a softening point of not higher than 600° C.;
- and
- (4) having a dielectric constant of not greater than 7.5 at a frequency of 1 MHz under room temperature,
- wherein said glass comprises 20-35 wt % of said B2O3 and 16-35 wt % of said BaO.
Dependencies are inferred from the claim text.