US5198154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature baking paste
Assignee: Asahi Kasei Corp
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Filing: 1991-03-18
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Granted: 1993-03-30
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Expires: 2011-03-18
Abstract
Abstract A composition, which comprises copper alloy powder represented by a general formula Ag x Cu y M z (where M represents one or more metals selected from Pb, Bi and Zn; x, y and z are atomic ratio values, respectively; and 0.001≦x≦0.4, 0.6≦y≦0.999, 0≦z≦0.05 and x+y+z=1) having particle surface silver concentration higher than the average silver concentration thereof and a region in which a silver concentration increases toward the particle surface, glass frit and an organic vehicle, is useful for pastes for screen printing, electroconductive circuits, electrodes, electromagnetic wave shields and an electroconductive pastes for a resistance contacts.
Inventors
- 👤 Akinori Yokoyama
- 👤 Tsutomu Katsumata
- 👤 Hitoshi Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:03
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; B; B22; B22F; B22F1/00; B22F1/17; C; C22; C22C; C22C1/00; C22C1/04; C22C1/05; C22C1/059; C22C32/00; C22C32/0089; H01B1/02; H01B1/026; H01C; H01C17/00; H01C17/28; H01C17/281; H01C17/283; H01G4/0085; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K9/00; H05K9/0073; H05K9/0081; H05K9/0083; B22F2999/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12021; Y10T428/12458
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
98 words
A composition, comprising 100 parts by weight of copper alloy powder represented by a general formula Ag x Cu y M z (where 0.001≦×≦0.4, 0.6≦y≦0.999, 0.000003 ≦z≦0.05, x+y+z =1; where M represents one or more metals selected from the group consisting of Pb, Bi and Zn; and x, y and z are atomic ratio values, respectively) particles of which have a particle surface silver concentration higher than the average silver concentration thereof and a region in which a silver concentration increases toward the particle surface, 0.1 to 50 parts by weight of glass frit and an organic vehicle.
Claim 2
Dependent Claim
98 words
A composition, comprising 100 parts by weight of copper alloy powder represented by a general formula Ag x Cu y M z (where 0.001≦×≦0.4, 0.6≦y≦0.999, 0.000003 ≦z≦0.05, x+y+z =1; where M represents one or more metals selected from the group consisting of Pb, Bi and Zn; and x, y and z are atomic ratio values, respectively) particles of which have a particle surface silver concentration higher than the average silver concentration thereof and a region in which a silver concentration increases toward the particle surface, 0.1 to 50 parts by weight of glass frit and an organic vehicle.
Claim 3
Dependent Claim
27 words
A composition according to claim 1, wherein the silver concentration in the surface of particles of said copper alloy powder is 2.1 times the average silver concentration.
Claim 4
Dependent Claim
36 words
A composition according to claim 1, wherein the average particle size of said copper alloy powder is from 0.1 to 50 μm and the shape thereof is a spherical shape, scaly shape or a mixture thereof.
Claim 5
Dependent Claim
21 words
A composition according to claim 1, wherein said copper alloy powder is obtained by rapid cooling to condense it by atomization.
Claim 6
Dependent Claim
44 words
A composition according to claim 1 wherein said organic vehicle is at least one member selected from the group consisting of ethylcellulose, acrylic resin, methylcellulose, hydroxy ethylcellulose, derivatives of ethylcellulose, alkyd resin, butyral resin, epoxy resin, phenol resin, alkyd phenol resin and wood rosin.
Claim 7
Dependent Claim
30 words
A composition according to claim 1, wherein said organic vehicle is methylcarbitol, ethylcarbitol, butylcarbitol or acetate thereof, ethylcellosolve, butylcellosolve, terpinol, toluene, xylene, methyl ethyl ketone, ethyl acetate, acetone or xylenol.
Claim 8
Dependent Claim
32 words
A composition according to claim 1, wherein said organic vehicle is contained in the ratio of 1 to 300 parts by weight per 100 parts by weight of said copper alloy powder.
Claim 9
Dependent Claim
55 words
A composition according to claim 1, wherein said glass frit is mainly composed of at least one member selected from the group consisting of PbO, B 2 O 3 , ZnO, SiO 2 , CaO, Al 2 O 3 , BaO, Bi 2 O 3 , Na 2 O, K 2 O, SrO and MgO.
Claim 10
Dependent Claim
13 words
A paste for screen printing composed of a composition according to claim 1.
Claim 11
Dependent Claim
14 words
A paste for an electroconductive circuit composed of a composition according to claim 1.
Claim 12
Dependent Claim
13 words
A paste for an electrode composed of a composition according to claim 1.
Claim 13
Dependent Claim
15 words
A paste for an electromagnetic wave shield composed of a composition according to claim 1.
Claim 14
Dependent Claim
15 words
An electroconductive paste for a resistance contact composed of a composition according to claim 1.
References Cited (Backward Citations)
JPS5271531A
Cited
JPS53101687A
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US4485153A
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US4728580A
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JPS62140304A
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US5091114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-29 | 1996-09-28 | 1997-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-29 | 2000-09-28 | 2001-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-29 | 2004-09-28 | 2005-03-30 | $7700.00 | Window Closed / Lapsed |