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Patent US5093986A successfully refreshed from Google Patents.
US5093986A
Expired / Lapsed
US
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Method of forming bump electrodes
Assignee: Murata Manufacturing Co Ltd
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Filing: 1991-02-04
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Granted: 1992-03-10
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Expires: 2011-02-04
Abstract
Abstract A method of forming bump electrodes, which is characterized in that conductive pastes are applied to a surface on which bump electrodes are to be formed, metal balls are made to adhere to the applied conductive pastes utilizing the viscosity of the conductive pastes before the conductive pastes are dried, and the conductive pastes and the metal balls are cofired.
Inventors
- 👤 Harufumi Mandai
- 👤 Yoshikazu Chigodo
- 👤 Atsushi Tojyo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:55
CPC Classifications
H; H01; H01R; H01R12/00; H01R12/50; H01R12/51; H01R12/55; H01R12/57; H05; H05K; H05K3/00; H05K3/40; H05K3/4007; H05K3/4015; H10; H10W; H10W70/00; H10W70/099; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K1/09; H05K1/092; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49147; Y10T29/49149; Y10T29/49204; Y10T29/49208; Y10T29/4921
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
A method of forming bump electrodes, comprising the steps of: applying conductive pastes to a surface on which bump electrodes are to be formed; making metal balls adhere to the applied conductive pastes utilizing the viscosity of the conductive pastes before the conductive pastes are dried; and firing the conductive pastes integrally with the metal balls.
Claim 2
Independent Claim
56 words
A method of forming bump electrodes, comprising the steps of: applying conductive pastes to a surface on which bump electrodes are to be formed; making metal balls adhere to the applied conductive pastes utilizing the viscosity of the conductive pastes before the conductive pastes are dried; and firing the conductive pastes integrally with the metal balls.
Claim 3
Dependent Claim
20 words
The method according to claim 1, wherein the surfaces of said metal balls are plated so as to prevent rust.
Claim 4
Dependent Claim
15 words
The method according to claim 1, wherein the surfaces of said metal balls are solder-plated.
Claim 5
Dependent Claim
33 words
The method according to claim 1, which further comprises the step of grinding the metal balls so as to make the heights of the metal balls equal to each other after the firing.
Claim 6
Dependent Claim
45 words
The method according to claim 1, wherein the step of applying conductive pastes to a surface on which bump electrodes are to be formed comprises the steps of applying and drying first conductive pastes and applying second conductive pastes to the first conductive pastes dried.
Claim 7
Dependent Claim
20 words
The method according to claim 5, wherein the surfaces of said metal balls are plated so as to prevent rust.
Claim 8
Dependent Claim
15 words
The method according to claim 5, wherein the surfaces of said metal balls are solder-plated.
Claim 9
Dependent Claim
33 words
The method according to claim 5, which further comprises the step of grinding the metal balls so as to make the heights of the metal balls equal to each other after the firing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |