Patent US5464950A successfully refreshed from Google Patents.
US5464950A
Expired / Lapsed
US
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Aluminum nitride circuit board and method of producing same
Assignee: Shinko Electric Industries Co Ltd
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Filing: 1993-09-03
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Granted: 1995-11-07
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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 03:10
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
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JPS63244521A
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US4906404A
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JPH02197189A
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JPH02159096A
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JPH0428294A
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JPH04118990A
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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 |