US5298333A
Expired / Lapsed
US
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Conductive surface layer
Assignee: GKSS Forshungszentrum Geesthacht GmbH
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Filing: 1991-04-19
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Granted: 1994-03-29
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Expires: 2011-04-19
Abstract
Abstract A conductive surface layer, for example to form an electrode. For piezoelectric, pyroelectric, and ferroelectric components, as well as for piezoceramic components, the layer is formed of at least one electrically conductive hard product of at least one of the metals of at least the groups III to VIII of the periodic table of the elements.
Inventors
- 👤 Uwe Maixner
- 👤 Dieter Milferstadt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:30
CPC Classifications
H; H10; H10N; H10N15/00; H10N15/10; H10N30/00; H10N30/80; H10N30/87; H10N30/877; H10N30/878
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
64 words
A component comprising a substrate having properties selected from the group consisting of piezoelectric, pyroelectric, ferroelectric, and piezoceramic, and a homogeneous conductive surface layer comprising a hard product of at least one metal compound, wherein the metal in said metal compound is at least one of the metals in the Groups IIIA to VIIIA and IIIB to VIIIB of the Period Table of elements.
Claim 2
Dependent Claim
64 words
A component comprising a substrate having properties selected from the group consisting of piezoelectric, pyroelectric, ferroelectric, and piezoceramic, and a homogeneous conductive surface layer comprising a hard product of at least one metal compound, wherein the metal in said metal compound is at least one of the metals in the Groups IIIA to VIIIA and IIIB to VIIIB of the Period Table of elements.
Claim 3
Dependent Claim
30 words
A component according to claim 1, wherein said hard product is at least one member selected from the group consisting of nitrides metal, carbides metal, silicides metal, and borides metal.
Claim 4
Dependent Claim
46 words
A component according to claim 2, wherein said hard product is at least one member selected from the group consisting of titanium nitride, zirconium nitride, chromium nitride, titanium carbide, zirconium carbide, tantalum carbide, titanium disilicide, zirconium disilicide, molybdenum silicide, titanium boride, chromium boride, and zirconium boride.
Claim 5
Dependent Claim
32 words
A component according to claim 2, wherein said metal is a least one member selected from the group consisting of titanium, zirconium, chromium, tantalum, molybdenum, vanadium, hafnium, niobium, tungsten, nickel, and iron.
Claim 6
Dependent Claim
23 words
A component according to claim 4, wherein said hard product is selected from the group consisting of titanium carbonitride, zirconium carbonitride, titanium boronitride.
Claim 7
Dependent Claim
18 words
A component according to claim 4, wherein said hard product is titanium zirconium nitride or titanium zirconium carbonitride.
Claim 8
Dependent Claim
13 words
A component according to claim 1, wherein said hard product is a non-stoichiometric
Claim 9
Dependent Claim
46 words
A component according to claim 1, wherein between said conductive surface layer and said substrate there is disposed at least one intermediate layer of at least one of the metals in groups IIIA to VIIIA and IIIB to VIIIB of the periodic table of the elements.
Claim 10
Dependent Claim
43 words
A component according to claim 1, wherein said hard product is at least partially covered by a layer metal of at least one of the metals of the groups IA to VIIIA and IB to VIIIB of the periodic table of the elements.
Claim 11
Dependent Claim
17 words
A component according to claim 9, wherein said metal layer is solderable for the application of leads.
Claim 12
Dependent Claim
11 words
A component according to claim 1, wherein said substrate is quartz.
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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) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |