# US 5,702,996 A · Insulation paste containing glass

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- Number: US 5,702,996 A
- Document ID: US5702996A
- Status: Granted
- Kind: A
- Application number: 08/720,053
- Filed: 1996-09-27
- Granted: 1997-12-30
- Earliest claimed: 1995-09-29
- Assignees: Murata Mfg. Co., Ltd.
- Inventors: Hiromichi Kawakami; Hiroji Tani
- Web page: https://patentgrep.com/patent/US5702996A

## CPC

- C03C 3/089: containing boron
- C03C 3/091: containing aluminium
- H01B 3/087: {Chemical composition of glass}
- H10W 70/69: Insulating materials thereof
- 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
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

Disclosed herein is a glass composition for insulation which comprises SiO.sub.2 and at least one of B.sub.2 O.sub.3 or K.sub.2 O in a ratio falling within the region enclosed by lines passing through point A (65, 35, 0), point B (65, 20, 15), point C (85, 0, 15) and point D (85, 15, 0) on a composition diagram for the ternary system of SiO.sub.2, B.sub.2 O.sub.3 and K.sub.2 O. The glass composition can additionally contain at least one member selected from the group consisting of Al.sub.2 O.sub.3, La.sub.2 O.sub.3, CaO, Ta.sub.2 O.sub.5 and Nd.sub.2 O.sub.3 in an amount less than 25 parts by weight for 100 parts by weight of the major constituents.

## Claims

### Claim 1

An insulation paste consisting of:
a glass consisting of a combination of at most SiO.sub.2, B.sub.2 O.sub.3, K.sub.2 O and refining agent, said glass having the composition ratio denoted as xSiO.sub.2 --yB.sub.2 O.sub.3 --zK.sub.2 O in which x, y and z designate the weight percent of the constituent components and which falls within the area bounded by lines connecting points A (x=65, y=35, z=0), B (x=65, y=20, z=15), C (x=85, y=0, z=15) and D (x=85, y=15, z=0) and containing less than about 100 parts by weight of said xSiO.sub.2 --yB.sub.2 O.sub.3 --zK.sub.2 O of at least one refining agent selected from the group consisting of Al.sub.2 O.sub.3, La.sub.2 O.sub.3, CaO, Ta.sub.2 O.sub.5 and Nb.sub.2 O.sub.3 ;
Al.sub.2 O.sub.3 filler in an amount of 0 or about 0.5 to 40 weight percent based on the combined weight of the glass and filler; and an organic vehicle.

### Claim 2 (depends on 1)

An insulation paste according to claim 1, wherein the area is surrounded by lines connecting points A, B' (x=65, y=35, z=3), C' (x=85, y=12, Z=3) and D.

### Claim 3 (depends on 1)

An insulation paste according to claim 1, wherein the area is surrounded by lines connecting points A" (x=75, y=24.5, z=0.5), B" (x=75, y=22, z=3), C' (x=85, y=12, z=3) and D" (x=85, y=14.5, z=0.5).

### Claim 4 (depends on 3)

An insulation paste according to claim 3, wherein the refining agent is present and is in an amount of less than about 5 parts by weight per 100 parts of said xSiO.sub.2 --yB.sub.2 O.sub.3 --zK.sub.2 O.

### Claim 5 (depends on 2)

An insulation paste according to claim 2, wherein the refining agent is present and is in an amount of less than about 5 parts by weight per 100 parts of said xSiO.sub.2 --yB.sub.2 O.sub.3 --zK.sub.2 O.

### Claim 6 (depends on 1)

An insulation paste according to claim 1, wherein the refining agent is present and is in an amount of less than about 5 parts by weight per 100 parts of said xSiO.sub.2 --yB.sub.2 O.sub.3 --zK.sub.2 O.

### Claim 7 (depends on 3)

An insulation paste according to claim 3, wherein the amount of Al.sub.2 O.sub.3 filler is 0 parts.

### Claim 8 (depends on 2)

An insulation paste according to claim 2, wherein the amount of Al.sub.2 O.sub.3 filler is 0 parts.

### Claim 9 (depends on 1)

An insulation paste according to claim 1, wherein the amount of Al.sub.2 O.sub.3 filler is 0 parts.

### Claim 10 (depends on 3)

An insulation paste according to claim 3, wherein the amount of the Al.sub.2 O.sub.3 filler is 10-30 weight percent based on the total weight of the filler and glass.

### Claim 11 (depends on 2)

An insulation paste according to claim 2, wherein the amount of the Al.sub.2 O.sub.3 filler is 10-30 weight percent based on the total weight Of the filler and glass.

### Claim 12 (depends on 1)

An insulation paste according to claim 1, wherein the amount of the Al.sub.2 O.sub.3 filler is 10-30 weight percent based on the total weight of the filler and glass.

### Claim 13 (depends on 3)

An insulation paste according to claim 3, wherein the filler is present and is in the form of an Al.sub.2 O.sub.3 powder.

### Claim 14 (depends on 2)

An insulation paste according to claim 2, wherein the filler is present and is in the form of an Al.sub.2 O.sub.3 powder.

### Claim 15 (depends on 1)

An insulation paste according to claim 1, wherein the filler is present and is in the form of an Al.sub.2 O.sub.3 powder.

### Claim 16 (depends on 3)

An insulation paste according to claim 3, wherein the filler is present and is in the form of an Al.sub.2 O.sub.3 colloid.

### Claim 17 (depends on 2)

An insulation paste according to claim 2, wherein the filler is present and is in the form of an Al.sub.2 O.sub.3 colloid.

### Claim 18 (depends on 11)

An insulation paste according to claim 11, wherein the filler is present and is in the form of an Al.sub.2 O.sub.3 colloid.

### Claim 19 (depends on 2)

An insulation paste according to claim 2, wherein the amount of organic vehicle is about 0.5 to 30 parts based on the weight of the paste.

### Claim 20 (depends on 1)

An insulation paste according to claim 1, wherein the amount of organic vehicle is about 0.5 to 30 parts based on the weight of the paste.