US5001598A
Expired / Lapsed
US
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Sinter control additive
Assignee: BASF Catalysts LLC
•
Filing: 1989-04-20
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Granted: 1991-03-19
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Expires: 2009-04-20
Abstract
Abstract A sinter control material which is added to silver or palladium silver powders used for internal electrodes within multilayer ceramic capacitors is described. Iridium and rhodium resinates are disclosed as the additives.
Inventors
- 👤 John C. Constantine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:22
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; H01G4/0085; B; B22; B22F; B22F3/00; B22F3/10; B22F3/1003; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 61
Claim 1
Independent Claim
96 words
An internal electrode material consisting essentially of (a) an internal electrode powder selected from the group consisting of silver and mixtures of silver and palladium, and (b) a sinter control additive selected from the group consisting of one or both of an iridium metallo organic resinate and a rhodium metallo organic resinate, said sinter control additive being present in an amount sufficient to modify the sintering rate of the internal electrode powder so that the sintering occurs slower and over a wider temperature range as compared to the internal electrode powder without the sinter control additive.
Claim 2
Dependent Claim
96 words
An internal electrode material consisting essentially of (a) an internal electrode powder selected from the group consisting of silver and mixtures of silver and palladium, and (b) a sinter control additive selected from the group consisting of one or both of an iridium metallo organic resinate and a rhodium metallo organic resinate, said sinter control additive being present in an amount sufficient to modify the sintering rate of the internal electrode powder so that the sintering occurs slower and over a wider temperature range as compared to the internal electrode powder without the sinter control additive.
Claim 3
Dependent Claim
31 words
The internal electrode material of claim 1, wherein the sinter control additive is present in an amount of from about 0.1 to 1.0 percent by weight of the internal electrode powder.
Claim 4
Dependent Claim
31 words
The internal electrode material of claim 2, wherein the sinter control additive is present in an amount of from about 0.1 to 0.5 percent by weight of the internal electrode powder.
Claim 5
Dependent Claim
21 words
The internal electrode material of claim 1, wherein the rhodium resinate is rhodium 2-ethylhexoate and the iridium resinate is iridium trichloride-tris-di-n-butylsulfide.
Claim 6
Dependent Claim
18 words
The internal electrode material of claim 1, wherein the conductive powder is a mixture of palladium and silver.
Claim 7
Dependent Claim
20 words
The internal electrode material of claim 5, wherein the mixture comprises 70 weight percent palladium and 30 weight percent silver.
Claim 8
Dependent Claim
20 words
The internal electrode material of claim 5, wherein the mixture comprises 60 weight percent palladium and 40 weight percent silver.
Claim 9
Dependent Claim
19 words
The internal electrode material of claim 5, wherein the mixture comprises 15 weight percent palladium, 85 weight percent silver.
Claim 10
Dependent Claim
13 words
The internal electrode material of claim 1, wherein the conductive powder is silver.
Claim 11
Dependent Claim
27 words
The internal electrode material of claim 1, wherein the sinter control additive is a mixture of an iridium metallo organic resinate and a rhodium metallo organic resinate.
Claim 12
Dependent Claim
37 words
The internal electrode material of claim 10, wherein the mixture of the iridium metallo organic resinate and the rhodium metallo organic resinate is present in a ratio of about 6:1 to 0.65:1 iridium resinate to rhodium resinate.
Claim 13
Dependent Claim
18 words
The internal electrode material of claim 11, wherein the ratio of iridium resinate to rhodium resinate is 2:1.
Claim 14
Dependent Claim
15 words
The internal electrode material of claim 1, which is in the form of a powder.
Claim 15
Dependent Claim
19 words
The internal electrode material of claim 1, in the form of an ink and containing a solvent based medium.
Claim 16
Dependent Claim
26 words
An internal electrode material comprising a mixture of palladium and silver as the conductive material and about 0.25 to 0.5 percent by weight of iridium trichloride-tris-di-n-butylsulfide.
Claim 17
Dependent Claim
26 words
An internal electrode material comprising a mixture of palladium and silver as the conductive material and about 0.25 to 0.5 percent by weight of iridium trichloride-tris-di-n-butylsulfide.
Claim 18
Dependent Claim
23 words
An internal electrode material comprising a mixture of palladium and silver as the conductive powder and about 0.1 to 0.25 percent rhodium 2-ethylhexoate.
Claim 19
Dependent Claim
23 words
An internal electrode material comprising a mixture of palladium and silver as the conductive powder and about 0.1 to 0.25 percent rhodium 2-ethylhexoate.
Claim 20
Dependent Claim
17 words
An internal electrode material comprising silver as the conductive powder and about 0.1 to 0.25% rhodium 2-ethylhexoate.
Claim 21
Dependent Claim
17 words
An internal electrode material comprising silver as the conductive powder and about 0.1 to 0.25% rhodium 2-ethylhexoate.
Claim 22
Dependent Claim
20 words
An internal electrode material comprising silver as the conductive powder and about 0.25 to 0.5% by weight of iridium trichloride-tris-di-n-butylsulfide.
Claim 23
Dependent Claim
20 words
An internal electrode material comprising silver as the conductive powder and about 0.25 to 0.5% by weight of iridium trichloride-tris-di-n-butylsulfide.
Claim 24
Dependent Claim
23 words
The process of claim 18, wherein the internal electrode material is in the form of an ink and contains a solvent based medium.
Claim 25
Dependent Claim
94 words
A process for modifying the sintering rate of an internal electrode material comprising adding to a conductive powder selected from the group consisting of silver and mixtures of palladium and silver a sinter control additive selected from the group consisting of one or both of a rhodium metallo organic resinate and an iridium metallo organic resinate in an amount sufficient to modify the sintering rate of the internal electrode material so that the sintering occurs slower and over a wider temperature range as compared to the internal electrode powder without the sinter control additive.
Claim 26
Dependent Claim
94 words
A process for modifying the sintering rate of an internal electrode material comprising adding to a conductive powder selected from the group consisting of silver and mixtures of palladium and silver a sinter control additive selected from the group consisting of one or both of a rhodium metallo organic resinate and an iridium metallo organic resinate in an amount sufficient to modify the sintering rate of the internal electrode material so that the sintering occurs slower and over a wider temperature range as compared to the internal electrode powder without the sinter control additive.
Claim 27
Dependent Claim
29 words
The process of claim 20, wherein the sinter control additive is present in an amount of from about 0.1 to 1.0 percent by weight of the internal electrode material.
Claim 28
Dependent Claim
29 words
The process of claim 21, wherein the sinter control additive is present in an amount of from about 0.1 to 0.5 percent by weight of the internal electrode material.
Claim 29
Dependent Claim
20 words
The process according to claim 20, wherein the rhodium resinate is rhodium 2-ethylhexoate and the iridium resinate is iridium trichloride-tris-di-n-butylsulfide.
Claim 30
Dependent Claim
16 words
The process of claim 20, wherein the conductive powder is a mixture of palladium and silver.
Claim 31
Dependent Claim
18 words
The process of claim 24, wherein the mixture comprises 30 weight percent palladium and 70 weight percent silver.
Claim 32
Dependent Claim
18 words
The process of claim 20, wherein the mixture comprises 60 weight percent palladium and 40 weight percent silver.
Claim 33
Dependent Claim
18 words
The process of claim 20, where the mixture comprises 15 weight percent palladium and 85 weight percent silver.
Claim 34
Dependent Claim
11 words
The process of claim 20, wherein the conductive powder is silver.
Claim 35
Dependent Claim
25 words
The process of claim 20 wherein the sinter control additive is a mixture of an iridium metallo organic resinate and a rhodium metallo organic resinate.
Claim 36
Dependent Claim
35 words
The process of claim 29, wherein the mixture of the iridium metallo organic resinate and the rhodium metallo organic resinate is present in a ratio of about 6:1 to 0.65:1 iridium resinate to rhodium resinate.
Claim 37
Dependent Claim
16 words
The process of claim 30, wherein the ratio of iridium resinate to rhodium resinate is 2:1.
Claim 38
Dependent Claim
17 words
The process of claim 20, wherein the internal electrode material is in the form of a powder.
Claim 39
Dependent Claim
35 words
A process for modifying the sintering rate of an internal electrode powder comprising adding to a conductive powder, comprising a mixture of palladium and silver about 0.25 to 0.5 percent by weight of iridium trichloride-tris-di-n-butylsulfide.
Claim 40
Dependent Claim
35 words
A process for modifying the sintering rate of an internal electrode powder comprising adding to a conductive powder, comprising a mixture of palladium and silver about 0.25 to 0.5 percent by weight of iridium trichloride-tris-di-n-butylsulfide.
Claim 41
Dependent Claim
37 words
A process for modifying the sintering rate of an internal electrode powder comprising adding to a conductive powder comprising a mixture of palladium and silver rhodium 2-ethylhexoate in an amount of about 0.1 to 0.25 weight percent.
Claim 42
Dependent Claim
37 words
A process for modifying the sintering rate of an internal electrode powder comprising adding to a conductive powder comprising a mixture of palladium and silver rhodium 2-ethylhexoate in an amount of about 0.1 to 0.25 weight percent.
Claim 43
Dependent Claim
28 words
A process for modifying the sintering rate of an internal electrode material comprising adding to a silver conductive powder about 0.25 to 0.5% by weight of iridium trichloride-tris-di-n-butylsulfide.
Claim 44
Dependent Claim
28 words
A process for modifying the sintering rate of an internal electrode material comprising adding to a silver conductive powder about 0.25 to 0.5% by weight of iridium trichloride-tris-di-n-butylsulfide.
Claim 45
Dependent Claim
31 words
A process for modifying the sintering rate of an internal electrode material comprising adding to a silver conductive powder rhodium 2-ethylhexoate in an amount of about 0.1 to 0.25 weight percent.
Claim 46
Dependent Claim
31 words
A process for modifying the sintering rate of an internal electrode material comprising adding to a silver conductive powder rhodium 2-ethylhexoate in an amount of about 0.1 to 0.25 weight percent.
Claim 47
Dependent Claim
105 words
A multilayer ceramic capacitor comprising at least two dielectric layers and at least one internal electrode layer disposed between the dielectric layers, said internal electrode layer consisting essentially of a conductive material selected from the group consisting of silver and mixtures of silver and palladium and a sinter control additive selected from the group consisting of an iridium metal and rhodium metal, said sinter control additive being present in an amount sufficient to modify the sintering rate of the internal electrode material so that the sintering occurs slower and over a wider range as compared to an internal electrode powder without the sinter control additive.
Claim 48
Dependent Claim
105 words
A multilayer ceramic capacitor comprising at least two dielectric layers and at least one internal electrode layer disposed between the dielectric layers, said internal electrode layer consisting essentially of a conductive material selected from the group consisting of silver and mixtures of silver and palladium and a sinter control additive selected from the group consisting of an iridium metal and rhodium metal, said sinter control additive being present in an amount sufficient to modify the sintering rate of the internal electrode material so that the sintering occurs slower and over a wider range as compared to an internal electrode powder without the sinter control additive.
Claim 49
Dependent Claim
31 words
The multilayer ceramic capacitor of claim 37, wherein the sinter control additive is present in an amount of from about 0.1 to 1.0 percent by weight of the internal electrode material.
Claim 50
Dependent Claim
31 words
The multilayer ceramic capacitor of claim 37, wherein the sinter control additive is present in an amount of from about 0.1 to 0.5 percent by weight of the internal electrode material.
Claim 51
Dependent Claim
18 words
The multilayer ceramic capacitor of claim 37, wherein the conductive powder is a mixture of palladium and silver.
Claim 52
Dependent Claim
13 words
The multilayer ceramic capacitor of claim 37, wherein the conductive powder is silver.
Claim 53
Dependent Claim
25 words
The multilayer ceramic capacitor of claim 37, wherein the rhodium is initially added as rhodium 2-ethylhexoate and the iridium is initially added as iridium trichloride-tris-di-n-butylsulfide.
Claim 54
Dependent Claim
114 words
A multilayer ceramic capacitor comprising at least two dielectric layers and at least one internal electrode layer disposed between the dielectric layers, said internal electrode layer comprising a conductive material selected from the group consisting of silver and mixtures of silver and palladium and a sinter control additive selected from the group consisting of an iridium metal initially added as iridium trichloride-tris-di-n-butylsulfide and a rhodium metal initially added as rhodium 2-ethylhexoate, said sinter control additive being present in an amount sufficient to modify the sintering rate of the internal electrode material so that the sintering occurs slower and over a wider range as compared to the internal electrode powder without the sinter control additive.
Claim 55
Dependent Claim
114 words
A multilayer ceramic capacitor comprising at least two dielectric layers and at least one internal electrode layer disposed between the dielectric layers, said internal electrode layer comprising a conductive material selected from the group consisting of silver and mixtures of silver and palladium and a sinter control additive selected from the group consisting of an iridium metal initially added as iridium trichloride-tris-di-n-butylsulfide and a rhodium metal initially added as rhodium 2-ethylhexoate, said sinter control additive being present in an amount sufficient to modify the sintering rate of the internal electrode material so that the sintering occurs slower and over a wider range as compared to the internal electrode powder without the sinter control additive.
Claim 56
Dependent Claim
21 words
The multilayer ceramic capacitor of claim 43, wherein the mixture comprises 30 weight percent palladium and 70 weight percent of silver.
Claim 57
Dependent Claim
20 words
The multilayer ceramic capacitor of claim 43, wherein the mixture comprises 60 weight percent palladium and 40 weight percent silver.
Claim 58
Dependent Claim
40 words
A multilayer ceramic capacitor comprising at least two dielectric layers and at least one internal electrode layer consisting essentially of a conductive material comprising a mixture of palladium and silver and about 0.25 to 0.5 percent by weight of iridium.
Claim 59
Dependent Claim
40 words
A multilayer ceramic capacitor comprising at least two dielectric layers and at least one internal electrode layer consisting essentially of a conductive material comprising a mixture of palladium and silver and about 0.25 to 0.5 percent by weight of iridium.
Claim 60
Dependent Claim
43 words
A multilayer ceramic capacitor comprising at least two dielectric layers and at least one internal electrode layer, said internal electrode layer consisting essentially of a mixture of palladium and silver as the conductive material and about 0.1 to 0.25 percent by weight rhodium.
Claim 61
Dependent Claim
43 words
A multilayer ceramic capacitor comprising at least two dielectric layers and at least one internal electrode layer, said internal electrode layer consisting essentially of a mixture of palladium and silver as the conductive material and about 0.1 to 0.25 percent by weight rhodium.
References Cited (Backward Citations)
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