US6608760B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric material including particulate filler
Assignee: TPL Inc
•
Filing: 1999-12-09
•
Granted: 2003-08-19
•
Expires: 2019-12-09
Abstract
Abstract A dielectric substrate useful in the manufacture of printed wiring boards is disclosed wherein the dielectric substrate comprises at least one organic polymer having a T g greater than 140° C. and at least one filler material. The dielectric substrate of this invention has a dielectric constant that varies less than 15% over a temperature range of from −55 to 125° C.
Inventors
- 👤 William F. Hartman
- 👤 Kirk M. Slenes
- 👤 Kristen J. Law
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:04
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; H; H05; H05K; H05K1/00; H05K1/16; H05K1/162; B32B2311/00; B32B2311/18; B32B2457/00; B32B2457/16; H05K2201/00; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; H05K2201/0242; H05K2201/0257; H05K2201/03; H05K2201/0302; H05K2201/0317; H05K2201/09; H05K2201/09209; H05K2201/0929; H05K2201/09309; H05K3/00; H05K3/46; H05K3/4611; H05K3/4688
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
76 words
A composite comprising at least one organic polymer having a T g greater than about 140° C., and at least one particle filler comprising non-refractory ferroelectric particles, said ferroelectric particles having a cubic crystalline structure, wherein the particle size is substantially in the range of between approximately 20 and 150 nanometers, and the dielectric constant of the composite varies less than 15% when the composite is subjected to a temperature of from −55 to 125° C.
Claim 2
Dependent Claim
76 words
A composite comprising at least one organic polymer having a T g greater than about 140° C., and at least one particle filler comprising non-refractory ferroelectric particles, said ferroelectric particles having a cubic crystalline structure, wherein the particle size is substantially in the range of between approximately 20 and 150 nanometers, and the dielectric constant of the composite varies less than 15% when the composite is subjected to a temperature of from −55 to 125° C.
Claim 3
Dependent Claim
12 words
The composite of claim 1 wherein the particles are barium-based ceramic particles.
Claim 4
Dependent Claim
22 words
The composite of claim 1 wherein the particles are selected from the group consisting of barium titanate, strontium titanate, and mixtures thereof.
Claim 5
Dependent Claim
22 words
The composite of claim 1 wherein the particles have an average particle size of from about 10 nm to about 60 nm.
Claim 6
Dependent Claim
30 words
The composite of claim 1 wherein at least 80% of the particles of the particle filler material have mean particle sizes ranging from about 40 micrometers to about 60 micrometers.
Claim 7
Dependent Claim
17 words
The composite of claim 1 including from about 20 to about 80 percent by weight ferroelectric particles.
Claim 8
Dependent Claim
17 words
The composite of claim 1 wherein the composite has a T g greater than about 160° C.
Claim 9
Dependent Claim
17 words
The composite of claim 1 wherein the composite has a T g greater than about 180° C.
Claim 10
Dependent Claim
14 words
The composite of claim 1 wherein at least one polymer is a thermosetting resin.
Claim 11
Dependent Claim
35 words
The composite of claim 9 wherein the resin is a thermosetting resin selected from the group consisting of epoxy resins, cyanate ester resins, silicone resins, polyamide resins, bismaleimide triazine resins, urethane resins, and mixtures thereof.
Claim 12
Dependent Claim
15 words
The composite of claim 1 wherein the composition breakdown voltage is greater than 2000 volts/mil.
Claim 13
Dependent Claim
41 words
A capacitor laminate comprising the composite of claim 1 in sheet form having a top surface and a bottom surface, a first conductive layer associated with the composite top surface, and a second conductive layer associated with the composite bottom surface.
Claim 14
Dependent Claim
17 words
The capacitor laminate of claim 12 wherein the first and second conductive layers are metal foil layers.
Claim 15
Dependent Claim
17 words
The capacitor laminate of claim 12 wherein the first and second conductive layers are copper foil layers.
Claim 16
Dependent Claim
21 words
The capacitor laminate of claim 12 wherein the composite sheet has a thickness of from about 1 to about 100 microns.
Claim 17
Dependent Claim
24 words
The capacitor laminate of claim 12 wherein at least one of said first conductive layers and second conductive layers is a sputtered metal layer.
Claim 18
Dependent Claim
13 words
The capacitor laminate of claim 12 wherein the breakdown voltage exceeds 2500 volts/mil.
Claim 19
Dependent Claim
18 words
A multi-layer printed wiring board wherein at least one layer comprises the capacitor laminate of claim 12 .
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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) | 2006-08-18 | 2007-02-17 | 2007-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-08-18 | 2011-02-17 | 2011-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-08-18 | 2015-02-17 | 2015-08-19 | $7700.00 | Window Closed / Lapsed |