# US 10,118,856 B2 · Lead-free glass and sealing material

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,118,856 B2
- Document ID: US10118856B2
- Status: Granted
- Kind: B2
- Application number: 15/537,911
- Filed: 2015-12-22
- Published: 2017-12-07
- Granted: 2018-11-06
- Earliest claimed: 2015-01-15
- Assignees: Central Glass Company, Limited
- Applicants: Central Glass Company, Limited
- Inventors: Masamichi Yanagisawa; Jun Hamada
- Web page: https://patentgrep.com/patent/US10118856B2

## CPC

- C03C 3/122: {containing oxides of As, Sb, Bi, Mo, W, V, Te as glass formers}
- C03C 3/21: containing titanium, zirconium, vanadium, tungsten or molybdenum
- C03C 8/04: containing zinc
- C03C 8/14: Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
- C03C 8/24: Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders
- C03C 27/046: {of metals, metal oxides or metal salts only}
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS

## Abstract

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 one selected from the group consisting of MgO, CaO, SrO, and BaO) in total, 0.1-6 wt % of ZnO, and 0.1-3 wt % of R2O (at least one selected from the group consisting of Li2O, Na2O, and K2O) in total. This glass can be used as a sealing material providing fluidity which is capable of being sealed at a temperature of 400° C. or less.

## Claims

### Claim 1

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 one selected from the group consisting of MgO, CaO, SrO, and BaO) in total,
0.1-6 wt % of ZnO, and
0.1-3 wt % of R2O (at least one selected from the group consisting of Li2O, Na2O, and K2O) in total.

### Claim 2 (depends on 1)

A sealing material, comprising the lead-free glass as claimed in claim 1 and an inorganic filler, wherein a content of the inorganic filler is in a range of 1-35 volume % relative to a total volume of the lead-free glass and the inorganic filler.

### Claim 3 (depends on 1)

A glass paste, comprising a glass powder composed of the lead-free glass as claimed in claim 1 and an organic vehicle.

### Claim 4 (depends on 3)

A method for producing an electronic component, comprising a step of baking at a temperature exceeding a softening point in order to perform sealing after applying the glass paste as claimed in claim 3.

### Claim 5 (depends on 4)

The method for producing the electric component as claimed in claim 4, wherein a baking temperature is 400° C. or less in the step of baking.