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US4420338A
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US
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Screen-printing ink
Assignee: US Philips Corp
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Filing: 1981-09-15
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Granted: 1983-12-13
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Expires: 2001-09-15
Abstract
Abstract The invention relates to a screen-printing ink for producing a resistor by firing in a neutral atmosphere, comprising a mixture of one or more metalhexaborides, a temporary binder and a glass as the permanent binder, the glass being an alkaline earth borate or silicoborate which comprises a quantity of not more than 5 mole % of one or more metal oxides chosen from vanadium, molybdenum, niobium, tungsten, manganese, iron, zirconium and tantalum.
Inventors
- 👤 Francis Ortega
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:07
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/14; H; H01; H01B; H01B1/00; H01B1/14; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06566
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
A screen-printing ink for producing a TCR modifier containing resistor by firing in a neutral atmosphere, said ink comprising a mixture of one or more metalhexaborides, a temporary binder and a glass as the permanent binder, characterized in that the glass is an alkaline earth metal borate consisting of an alkaline earth metal oxide and boron oxide or an alkaline earth metal silicoborate consisting of an alkaline earth metal oxide, boron oxide and silicon dioxide which glass is modified by a quantity of not more than 5 mole% of one or more metal oxides selected from the group consisting of oxides of vanadium, molybdenum, niobium, tungsten, manganese, iron, zirconium and tantalum.
Claim 2
Dependent Claim
111 words
A screen-printing ink for producing a TCR modifier containing resistor by firing in a neutral atmosphere, said ink comprising a mixture of one or more metalhexaborides, a temporary binder and a glass as the permanent binder, characterized in that the glass is an alkaline earth metal borate consisting of an alkaline earth metal oxide and boron oxide or an alkaline earth metal silicoborate consisting of an alkaline earth metal oxide, boron oxide and silicon dioxide which glass is modified by a quantity of not more than 5 mole% of one or more metal oxides selected from the group consisting of oxides of vanadium, molybdenum, niobium, tungsten, manganese, iron, zirconium and tantalum.
Claim 3
Dependent Claim
19 words
A screen-printing ink as claimed in claim 1, characterized in that the metal hexaboride is a bivalent metal hexaboride.
Claim 4
Dependent Claim
16 words
A screen-printing ink as claimed in claim 2, characterized in that the bivalent metal is strontium.
Claim 5
Dependent Claim
18 words
A screen-printing ink as claimed in claim 1, characterized in that the metal hexaboride is trivalent metal hexaboride.
Claim 6
Dependent Claim
16 words
A screen-printing ink as claimed in claim 4, characterized in that the trivalent metal is lanthanum.
Claim 7
Dependent Claim
19 words
A screen-printing ink as claimed in claim 1, containing a mixture of hexaborides of bivalent metals and trivalent metals.
Claim 8
Dependent Claim
20 words
A screen-printing ink as claimed in claim 1, containing a solid solution of hexaborides of bivalent metals and trivalent metals.
Claim 9
Dependent Claim
50 words
A screen-printing ink as claimed in claim 1, characterized in that the glass is calcium borate containing one or more of the modifier metal oxides in the following composition in mole%: CaCO 3 : 30 to 35% B 2 O 3 : 60 to 65% Modifier oxides: 1 to 5%
Claim 10
Dependent Claim
39 words
An ink for a screen-printing on a substrate and subsequent firing in a neutral atmosphere as claimed in any one of claims 1 to 8, characterized in that the temporary binder consists of a solution of methylcellulose in terpineol.
References Cited (Backward Citations)
GB1489031A
Cited
GB2021093B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |