Patent US6463176B1 successfully refreshed from Google Patents.
Patent US6541137B1 successfully refreshed from Google Patents.
US6541137B1
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Multi-layer conductor-dielectric oxide structure
Assignee: North Carolina State University
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Filing: 2000-07-31
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Granted: 2003-04-01
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Expires: 2020-07-31
Abstract
Abstract A dielectric film is formed on a free-standing conductive metal layer to form a multi-layer foil comprising a conductive metal layer, a barrier layer and a dielectric oxide layer. Such multi-layer foils are mechanically flexible, and useful for the manufacture of capacitors. Examples of barrier layers include Ni—P or Ni—Cr alloys. After a second layer of conductive metal is deposited on a dielectric oxide surface opposing the first conductive metal layer, the resulting capacitor foil is processed into a capacitor. The resulting capacitor is a surface mounted capacitor or is formed as a integrated or embedded capacitor within a circuit board.
Inventors
- 👤 Angus Kingon
- 👤 Gregory J. Dunn
- 👤 Stephen Streiffer
- 👤 Kevin Cheek
- 👤 Min-xian Zhang
- 👤 Jon-Paul Maria
- 👤 Jovica Savic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:50
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/16; H05K1/162; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/0175; H05K2201/0179; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; H05K2201/09; H05K2201/09209; H05K2201/095; H05K2201/09509; H05K2203/00; H05K2203/12; H05K2203/121
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
65 words
A multi-layer foil comprising: a conductive metal layer having opposing first and second metal surfaces; a barrier layer disposed on the first metal surface and having a barrier surface; and a dielectric oxide layer disposed on the barrier surface, wherein the barrier layer is formed from a nickel alloy containing a concentration of an alloy ingredient effective to limit oxidation of the conductive metal layer.
Claim 2
Dependent Claim
65 words
A multi-layer foil comprising: a conductive metal layer having opposing first and second metal surfaces; a barrier layer disposed on the first metal surface and having a barrier surface; and a dielectric oxide layer disposed on the barrier surface, wherein the barrier layer is formed from a nickel alloy containing a concentration of an alloy ingredient effective to limit oxidation of the conductive metal layer.
Claim 3
Dependent Claim
26 words
The multi-layer foil of claim 1 , wherein the conductive metal comprises a metal selected from group consisting of copper, copper alloys, nickel and nickel alloys.
Claim 4
Dependent Claim
17 words
The multi-layer foil of claim 2 , wherein the dielectric oxide is a lead containing dielectric oxide.
Claim 5
Dependent Claim
60 words
The multi-layer foil of claim 2 , wherein the dielectric oxide is formed from a material selected from the group consisting of lead zirconate titanate, lead lanthanum zirconate titanate, lead lanthanide titanate, lead titanate, lead zirconate, lead magnesium niobate, barium titanate, and barium strontium titanate, the dielectric oxide further comprising optional additional small quantities of nickel, niobium, calcium or strontium.
Claim 6
Dependent Claim
30 words
The multi-layer foil of claim 4 , wherein the dielectric oxide is formed from a material selected from the group consisting of lead zirconate titanate and lead lanthanum zirconate titanate.
Claim 7
Dependent Claim
23 words
The multi-layer foil of claim 5 , wherein a second conductive metal layer is disposed on a surface of the dielectric oxide layer.
Claim 8
Dependent Claim
25 words
The multi-layer foil of claim 1 , wherein a layer of palladium or platinum is interposed between the barrier layer and the dielectric oxide layer.
Claim 9
Dependent Claim
24 words
The multi-layer foil of claim 1 , wherein the barrier layer is a nickel phosphorus comprising about 1 to about 40 wt % phosphorous.
Claim 10
Dependent Claim
24 words
The multi-layer foil of claim 1 , wherein the barrier layer is a nickel phosphorus comprising about 4 to about 11 wt % phosphorous.
Claim 11
Dependent Claim
24 words
The multi-layer foil of claim 1 , wherein the barrier layer is a nickel phosphorus comprising about 7 to about 9 wt % phosphorous.
Claim 12
Dependent Claim
83 words
A multi-layer foil comprising: a copper layer of about 10 to about 50 micron thickness having opposing first and second copper surfaces; a barrier layer composing about 1 to about 3 micron thickness nickel phosphorus disposed on the first copper surface, and having a barrier surface, wherein the phosphorus concentration of the nickel phosphorus layer is about 4 to about 11 wt %; and a dielectric oxide layer comprising lead of about 0.2 to about 1 micron thickness disposed on the barrier surface.
Claim 13
Dependent Claim
83 words
A multi-layer foil comprising: a copper layer of about 10 to about 50 micron thickness having opposing first and second copper surfaces; a barrier layer composing about 1 to about 3 micron thickness nickel phosphorus disposed on the first copper surface, and having a barrier surface, wherein the phosphorus concentration of the nickel phosphorus layer is about 4 to about 11 wt %; and a dielectric oxide layer comprising lead of about 0.2 to about 1 micron thickness disposed on the barrier surface.
Claim 14
Dependent Claim
26 words
The multi-layer foil of claim 11 , wherein the dielectric oxide is form from a material selected from lead zirconate titanate or lead lanthanum zirconate titanate.
Claim 15
Dependent Claim
34 words
A capacitor foil comprising: the multi-layer foil of claim 11 ; wherein the dielectric oxide layer has a dielectric oxide surface; and a second conductive metal layer is disposed on the dielectric oxide surface.
Claim 16
Dependent Claim
24 words
The capacitor foil of claim 13 further comprising a second barrier layer interposed between the second conductive metal layer and the dielectric oxide layer.
Claim 17
Dependent Claim
60 words
The capacitor foil of claim 13 , wherein the dielectric oxide is formed from a material selected from the group consisting of lead zirconate titanate, lead lanthanum zirconate titanate, lead lanthanide titanate, lead titanate, lead zirconate, lead magnesium niobate, barium titanate, and barium strontium titanate, the dielectric oxide further comprising optional additional small quantities of nickel, niobium, calcium or strontium.
Claim 18
Dependent Claim
31 words
The capacitor foil of claim 13 , wherein the second conductive metal layer comprise a metal selected from the group consisting of copper, copper alloys, nickel, nickel alloys, palladium and platinum.
Claim 19
Dependent Claim
14 words
The capacitor foil of claim 14 , wherein the second barrier layer comprises nickel-phosphorus.
Claim 20
Dependent Claim
122 words
A capacitor containing circuit board comprising: circuit board substrate having a substrate surface; and a capacitor comprising a first electrode comprising a first conductive metal layer having a first conductive metal surface and a barrier layer consisting of nickel phosphorus having a barrier surface; a dielectric oxide layer deposited on the barrier surface having an opposing dielectric oxide surface; and a second electrode disposed on the dielectric oxide surface having an opposing second electrode surface, wherein the capacitor is disposed on the substrate surface by either the first conductive metal surface or the second electrode surface and the opposing electrode defines a capacitor, and wherein the barrier layer inhibits oxidation of the conductor metal layer during deposition of the dielectric oxide layer.
Claim 21
Dependent Claim
122 words
A capacitor containing circuit board comprising: circuit board substrate having a substrate surface; and a capacitor comprising a first electrode comprising a first conductive metal layer having a first conductive metal surface and a barrier layer consisting of nickel phosphorus having a barrier surface; a dielectric oxide layer deposited on the barrier surface having an opposing dielectric oxide surface; and a second electrode disposed on the dielectric oxide surface having an opposing second electrode surface, wherein the capacitor is disposed on the substrate surface by either the first conductive metal surface or the second electrode surface and the opposing electrode defines a capacitor, and wherein the barrier layer inhibits oxidation of the conductor metal layer during deposition of the dielectric oxide layer.
Claim 22
Dependent Claim
38 words
The capacitor according to claim 18 , wherein the second electrode comprises a second conductive metal layer and a second barrier layer consisting of nickel phosphorus interposed between the second conductive metal layer and the dielectric oxide layer.
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) | 2006-03-31 | 2006-09-30 | 2007-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-03-31 | 2010-09-30 | 2011-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-03-31 | 2014-09-30 | 2015-04-01 | $7700.00 | Window Closed / Lapsed |