Patent US4342203A successfully refreshed from Google Patents.
US4906404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper conductor composition
Assignee: MINING CO Ltd
•
Filing: 1988-11-07
•
Granted: 1990-03-06
•
Expires: 2008-11-07
Abstract
Abstract A copper conductor composition having an improved solderability as well as a good adhesion, which comprises a copper powder, an inorganic binder and a boride or silicide of a metal such as W, Mo, Ti, Ta, Nb or Cr. The solderability is kept on a good level even if the composition is subjected to a firing operation repeatedly.
Inventors
- 👤 Masatoshi Suehiro
- 👤 Masashi Echigo
- 👤 Masami Sakuraba
- 👤 Yutaka Mitsune
- 👤 Seiichi Nakatani
- 👤 Tsutomu Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:57
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H10; H10W; H10W70/00; H10W70/60; H10W70/62; H10W70/66; H10W70/666
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A copper conductor composition comprising 70 to 90% by weight, based on the weight of the composition of copper powder 0.1 to 10% by weight, based on the weight of the composition of an inorganic binder 8 to 20% by weight, based on the weight of the composition of an organic medium, and at least one of (a) 0.01 to 1% by weight, based on the weight of the composition, of a metal boride selected from the group consisting of tungsten boride, molybdenum boride, titanium boride, tantalum boride, niobium boride, chromium boride and solid solutions thereof, and (b) 0.01 to 3% by weight, based on the weight of the composition, of a metal silicide selected from the group consisting of tungsten silicide, molybdenum silicide, titanium silicide, tantalum silicide, niobium silicide, chromium silicide, and solid solutions thereof.
Claim 2
Dependent Claim
136 words
A copper conductor composition comprising 70 to 90% by weight, based on the weight of the composition of copper powder 0.1 to 10% by weight, based on the weight of the composition of an inorganic binder 8 to 20% by weight, based on the weight of the composition of an organic medium, and at least one of (a) 0.01 to 1% by weight, based on the weight of the composition, of a metal boride selected from the group consisting of tungsten boride, molybdenum boride, titanium boride, tantalum boride, niobium boride, chromium boride and solid solutions thereof, and (b) 0.01 to 3% by weight, based on the weight of the composition, of a metal silicide selected from the group consisting of tungsten silicide, molybdenum silicide, titanium silicide, tantalum silicide, niobium silicide, chromium silicide, and solid solutions thereof.
References Cited (Backward Citations)
FR781400A
Cited
US2993815A
Cited
US3341363A
Cited
US3647532A
Cited
US3998647A
Cited
US4072771A
Cited
GB1559523A
Cited
US4070518A
Cited
US4172919A
Cited
US4225468A
Cited
US4323483A
Cited
US4322316A
Cited
US4521329A
Cited
US4514321A
Cited
US4540604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |