US5464950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum nitride circuit board and method of producing same
Assignee: Shinko Electric Industries Co Ltd
•
Filing: 1993-09-03
•
Granted: 1995-11-07
•
Expires: 2013-09-03
Abstract
Abstract An aluminum nitride circuit board includes an aluminum nitride ceramic body. An inner conductor metal which is to be used as a wiring material is formed in the aluminum nitride ceramic body. The inner conductor metal is mainly made of copper, a melting point of which is lower than a firing temperature of the aluminum nitride ceramic. A layer mainly made of a periodic table IVa group metal or compound, such as titanium, zirconium, or hafnium, is formed in an interface between the aluminum nitride ceramic body and the inner conductor metal.
Inventors
- 👤 Michio Horiuchi
- 👤 Yoichi Harayama
- 👤 Koishiro Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:01
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/01; H10W70/05; H05; H05K; H05K3/00; H05K3/40; H05K3/4038; H05K3/4053; H05K3/4061; H10W70/098; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K1/09; H05K1/092; H05K1/11; H05K1/115; H05K2201/00; H05K2201/03; H05K2201/0302; H05K2201/0317; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/09781; H05K2201/09818; H05K2201/09909; H05K2203/00; H05K2203/02; H05K2203/025; H05K2203/13; H05K2203/1377; H05K2203/1383; H05K3/22; H05K3/24; H05K3/245; H05K3/38; H05K3/388; H05K3/46; H05K3/4611; H05K3/4626; H05K3/4629
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
An aluminum nitride circuit board comprising: an aluminum nitride ceramic body; an inner conductor metal, which is to be used as a wiring material, formed in said aluminum nitride ceramic body, said inner conductor metal being mainly made of copper, a melting point of which is lower than the firing temperature of said aluminum nitride ceramic body; and a layer mainly made of a periodic table IVb group metal or compound, such as titanium, zirconium, or hafnium, formed in an interface between said aluminum nitride ceramic body and said inner conductor metal.
Claim 2
Dependent Claim
92 words
An aluminum nitride circuit board comprising: an aluminum nitride ceramic body; an inner conductor metal, which is to be used as a wiring material, formed in said aluminum nitride ceramic body, said inner conductor metal being mainly made of copper, a melting point of which is lower than the firing temperature of said aluminum nitride ceramic body; and a layer mainly made of a periodic table IVb group metal or compound, such as titanium, zirconium, or hafnium, formed in an interface between said aluminum nitride ceramic body and said inner conductor metal.
Claim 3
Dependent Claim
17 words
An aluminum nitride circuit board according to claim 1, wherein said layer is mainly made of titanium.
References Cited (Backward Citations)
JPS6315866A
Cited
JPS63244521A
Cited
US4906404A
Cited
JPH02197189A
Cited
US5229213A
Cited
JPH02159096A
Cited
JPH0346705A
Cited
JPH03240289A
Cited
JPH03276797A
Cited
JPH0428294A
Cited
JPH04118990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-11-06 | 1999-05-08 | 1999-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-06 | 2003-05-08 | 2003-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-06 | 2007-05-08 | 2007-11-07 | $7700.00 | Window Closed / Lapsed |