EP0008133A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A thick film resistor composition comprising a temperature coefficient of resistance modifier
Assignee: EIDP Inc
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Filing: 1979-08-16
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Granted: —
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Expires: 1999-08-16
Abstract
Abstract Temperature coefficient of resistance (TCR) modifiers, useful in thick film resistor compositions, which can be fired in nonoxidizing atmosphere and which are based on LaB 6 and glass powders dispersed in a vehicle, are provided. Among such TCR modifiers are included TiO, Ge, Si, and graphite.
Inventors
- 👤 Paul Christopher Donohue
- 👤 Sanford Morton Marcus
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 21:50
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/14; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06566; H10; H10D; H10D86/00; H10D86/80; H10D86/85
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
A resistor composition consisting essentially of inorganic powder solids content dispersed in an organic vehicle wherein the solids content consists essentially of A. 1-20 parts by weight, based on the weight of the solids, of TCR modifier which is substantially nonreactive with and nonreducible by the conductive material; and B. 99-80 parts by weight, based on the weight of the solids, of a. 10-95 parts by weight, based on the weight of (a) plus (b), of conductive material selected from the group consisting of LaB 6 , YB 6' rare earth hexaborides, CaB 6 , BaB 6 and SrB 6 ; and b. 90-5 parts by weight, based on the weight of (a) plus (b), of glass; and wherein the composition is compatible with copper conductors and is fireable in substantially nonoxidizing atmosphere.
Claim 2
Dependent Claim
133 words
A resistor composition consisting essentially of inorganic powder solids content dispersed in an organic vehicle wherein the solids content consists essentially of A. 1-20 parts by weight, based on the weight of the solids, of TCR modifier which is substantially nonreactive with and nonreducible by the conductive material; and B. 99-80 parts by weight, based on the weight of the solids, of a. 10-95 parts by weight, based on the weight of (a) plus (b), of conductive material selected from the group consisting of LaB 6 , YB 6' rare earth hexaborides, CaB 6 , BaB 6 and SrB 6 ; and b. 90-5 parts by weight, based on the weight of (a) plus (b), of glass; and wherein the composition is compatible with copper conductors and is fireable in substantially nonoxidizing atmosphere.
Claim 3
Dependent Claim
76 words
The resistor composition of Claim 1 wherein said TCR modifiers are selected from the group consisting of TiO, its higher oxidation state precursors Ti 3 0 5 and Ti 2 0 3 ; NbO; TaO; C; Si; Ge; SiC; compounds based on Groups III A and V A of the periodic chart of the elements; compounds based on Groups II B and VI A of the periodic chart, rare earth nitrides and Group III B nitrides.
Claim 4
Dependent Claim
16 words
The resistor composition of Claim 1 wherein said glass is substantially nonreducible by the conductive material.
Claim 5
Dependent Claim
28 words
The resistor composition of Claim 1 or 2 wherein the TCR modifier is present to the extent of 2.5-10 parts by weight based on the weight of solids.
Claim 6
Dependent Claim
29 words
The resistor composition of Claim 1 or Claim 2 wherein the TCR modifier is present to the extent of 1-4 parts by weight based on the weight of solids.
Claim 7
Dependent Claim
26 words
The resistor composition of Claim 1 wherein said organic vehicle is a solution of ethylene-vinyl acetate polymer containing at least 53% by weight of vinyl acetate.
Claim 8
Dependent Claim
15 words
The resistor composition of Claim 1 or Claim 3 wherein said TCR modifier is TiO.
References Cited (Backward Citations)
No citation records indexed.
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