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US4985176A
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Resistive paste
Assignee: Murata Manufacturing Co Ltd
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Filing: 1988-12-02
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Granted: 1991-01-15
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Expires: 2008-12-02
Abstract
Abstract Resistive paste comprises at least one metal hexaboride and a vitreous binder suspended in an organic vehicle, and is characterized in that said vitreous binder is composed of a glass frit consisting essentially of 0.5 to 5.0 mol % of niobium oxide and the balance of alkaline earth metal borosilicate. The resistive paste may further contain at least one nitride selected from the group consisting of aluminum nitride and boron nitride, the content of aluminum nitride or boron nitride in the inorganic solid component composed of metal hexaboride, vitreous binder and aluminum or boron nitride in the paste being 5 to 30 wt %.
Inventors
- 👤 Shizuharu Watanabe
- 👤 Hiroji Tani
- 👤 Tohru Kasanami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:11
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06573; H01C17/0658
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
A resistive paste consisting essentially of an inorganic solid component suspended in an organic vehicle, said inorganic solid component consisting essentially of at least one metal hexaboride, 5 to 30 weight % of at least one nitride selected from the group consisting of aluminum nitride and boron nitride, and a vitreous binder composed of a glass frit consisting essentially of alkaline earth metal borosilicate and 0.5 to 5.0 mol % of niobium oxide.
Claim 2
Dependent Claim
73 words
A resistive paste consisting essentially of an inorganic solid component suspended in an organic vehicle, said inorganic solid component consisting essentially of at least one metal hexaboride, 5 to 30 weight % of at least one nitride selected from the group consisting of aluminum nitride and boron nitride, and a vitreous binder composed of a glass frit consisting essentially of alkaline earth metal borosilicate and 0.5 to 5.0 mol % of niobium oxide.
Claim 3
Dependent Claim
12 words
Resistive paste according to claim 1 containing aluminum nitride and boron nitride.
Claim 4
Dependent Claim
28 words
Resistive paste according to claim 1 wherein said metal hexaboride is selected from the group consisting of hexaborides of alkali metals, alkaline earth metals and rare earth metals.
Claim 5
Dependent Claim
22 words
Resistive paste according to claim 1 wherein the content of vitreous binder in the inorganic solid component is 30 to 95 wt%.
Claim 6
Dependent Claim
12 words
Resistive paste according to claim 1 wherein said nitride is aluminum nitride.
Claim 7
Dependent Claim
12 words
Resistive paste according to claim 1 wherein said nitride is boron nitride.
Claim 8
Dependent Claim
56 words
Resistive paste according to claim 1 wherein said alkaline earth metal borosilicate is the one having a composition expressed by the general formula (I) or (II) RO-B.sub.2 O.sub.3 -SiO.sub.2 (I) R.sub.2 O-RO-B.sub.2 O.sub.3 -SiO.sub.2 (II) where R 2 O is at least one alkali metal oxide and RO is at least one alkaline earth metal oxide
Claim 9
Dependent Claim
39 words
Resistive paste as claimed in claim 7 wherein R 2 O is selected from the group consisting of Na 2 O and K 2 O and RO is selected from the group consisting of BaO, CaO, MgO and SrO.
Claim 10
Dependent Claim
14 words
Resistive paste according to claim 3 in which said hexaboride is LaB 6 .
Claim 11
Dependent Claim
22 words
Resistive paste according to claim 9 wherein the content of vitreous binder in the inorganic solid component is 30 to 95 wt%.
Claim 12
Dependent Claim
28 words
Resistive paste according to claim 10 wherein said nitride is aluminum nitride and the content of vitreous binder in the inorganic solid component is 40 to 80 wt%.
Claim 13
Dependent Claim
28 words
Resistive paste according to claim 10 wherein said nitride is boron nitride and the content of vitreous binder in the inorganic solid component is 55 to 80 wt%.
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |