US5552210A
Expired / Lapsed
US
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Ceramic filled composite polymeric electrical substrate material exhibiting high dielectric constant and low thermal coefficient of dielectric constant
Assignee: World Properties Inc
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Filing: 1994-11-07
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Granted: 1996-09-03
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Expires: 2014-11-07
Abstract
Abstract A high dielectric (K'≧5), comparatively low thermal coefficient (absolute value of TCK'≦200 ppm/°C.) polymeric composite matrix is presented comprising commonly available and low cost fillers such as titania, alumina and magnesium oxide.
Inventors
- 👤 Allen F. Horn, III
- 👤 Robert L. Bush
- 👤 Michael E. St. Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:39
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0373; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; H05K1/032; H05K1/034; H05K1/16; H05K1/162; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/015; H05K2201/0158; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; H05K2201/0239; H05K2201/06; H05K2201/068; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/249921; Y10T428/249994; Y10T428/25; Y10T428/252; Y10T428/254; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
80 words
An electrical substrate composite material comprising: (1) a polymeric matrix; (2) particulate ceramic filler material, said filler material comprising a mixture of; (a) at least one first ceramic material having a a K'>30 and a TCK'<-300 ppm/°C., said mixture of ceramic fillers being proportioned in a ratio effective to provide the composite material with a K' of ≧5 and an absolute value TCK' of ≦200 ppm/°C.; and (b) at least one second ceramic material having K'<30 and a TCK'>0 ppm/°C.
Claim 2
Dependent Claim
80 words
An electrical substrate composite material comprising: (1) a polymeric matrix; (2) particulate ceramic filler material, said filler material comprising a mixture of; (a) at least one first ceramic material having a a K'>30 and a TCK'<-300 ppm/°C., said mixture of ceramic fillers being proportioned in a ratio effective to provide the composite material with a K' of ≧5 and an absolute value TCK' of ≦200 ppm/°C.; and (b) at least one second ceramic material having K'<30 and a TCK'>0 ppm/°C.
Claim 3
Dependent Claim
24 words
The material of claim 1 wherein: said first ceramic material is selected from the group consisting of titania, CaTiO 3 and SrTiO 3 .
Claim 4
Dependent Claim
24 words
The material of claim 1 wherein: said second ceramic material is selected from the group consisting of alumina, silica, magnesium oxide, MgTiO 3 .
Claim 5
Dependent Claim
24 words
The material of claim 2 wherein: said second ceramic material is selected from the group consisting of alumina, silica, magnesium oxide, MgTiO 3 .
Claim 6
Dependent Claim
18 words
The material of claim 1 wherein: the composite has a Z-axis coefficient of thermal expansion of <40 ppm/°C.
Claim 7
Dependent Claim
27 words
The material of claim 1 wherein: said polymeric matrix is present in an amount of between about 30 to 50 volume percent of the total substrate material.
Claim 8
Dependent Claim
27 words
The material of claim 1 wherein: said filler material is present in an amount of between about 50 to 70 volume percent of the total substrate material.
Claim 9
Dependent Claim
27 words
The material of claim 7 wherein: said filler material is present in an amount of between about 50 to 70 volume percent of the total substrate material.
Claim 10
Dependent Claim
13 words
The material of claim 1 including: a hydrophobic coating on said ceramic materials.
Claim 11
Dependent Claim
23 words
The material of claim 9 wherein: said coating on said ceramic materials is selected from the group consisting of silanes, titanates and zirconates.
Claim 12
Dependent Claim
34 words
The material of claim 1 wherein said composite material comprises a sheet having opposed surfaces and including: at least one metal layer on at least a portion of a surface of the composite material.
Claim 13
Dependent Claim
11 words
The material of claim 11 wherein: the metal layer comprises copper.
Claim 14
Dependent Claim
35 words
The material of claim 12 wherein said composite material has a planar shape and includes an X-Y plane and wherein: the CTE of the composite material is substantially equal to the CTE of the copper.
Claim 15
Dependent Claim
12 words
The material of claim 1 wherein: said polymeric matrix comprises fluoropolymeric material.
Claim 16
Dependent Claim
31 words
The material of claim 14 wherein: said fluoropolymeric matrix is selected from the group consisting of polytetrafluoroethylene, a copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether, poly(ethylene-co-chlorotrifluoroethylene), poly(chlorotrifluoroethylene), poly(ethylene-co-tetrafluoroethylene) and poly(vinylidene fluoride).
Claim 17
Dependent Claim
18 words
The material of claim 1 wherein: said composite material has an absolute value of TCK' of ≦75 ppm/°C.
Claim 18
Dependent Claim
13 words
The material of claim 1 wherein: said polymeric matrix comprises a thermoset material.
Claim 19
Dependent Claim
12 words
The material of claim 17 wherein: said thermoset material comprises polybutadiene material.
Claim 20
Dependent Claim
12 words
The material of claim 1 wherein: said polymeric matrix comprises thermoplastic material.
Claim 21
Dependent Claim
11 words
The material of claim 19 wherein said thermoplastic material comprises polyolefins.
Claim 22
Dependent Claim
19 words
The material of claim 20 wherein said polyolefins are selected from the group consisting of: polyethylene, polypropylene and poly(4-methylpentene).
Claim 23
Dependent Claim
11 words
The material of claim 19 wherein said thermoplastic material comprises poly(phenyleneoxide).
Claim 24
Dependent Claim
105 words
An electrical substrate composite material comprising: (1) a fluoropolymeric matrix; (2) particulate ceramic filler material, said filler material comprising a mixture of; (a) at least one first ceramic material selected from the group consisting of titania, CaTiO 3 , SrTiO 3 having a K'>30 and a TCK'<-300 ppm/°C., said mixture of ceramic fillers being proportioned in a ratio effective to provide the composite material with a K' of ≧5 and an absolute value TCK' of ≦200 ppm/°C.; and (b) at least one second ceramic material selected from the group consisting of alumina, silica, magnesium oxide, and MgTiO 3 having K'<30 and a TCK' >0 ppm/°C.
Claim 25
Dependent Claim
105 words
An electrical substrate composite material comprising: (1) a fluoropolymeric matrix; (2) particulate ceramic filler material, said filler material comprising a mixture of; (a) at least one first ceramic material selected from the group consisting of titania, CaTiO 3 , SrTiO 3 having a K'>30 and a TCK'<-300 ppm/°C., said mixture of ceramic fillers being proportioned in a ratio effective to provide the composite material with a K' of ≧5 and an absolute value TCK' of ≦200 ppm/°C.; and (b) at least one second ceramic material selected from the group consisting of alumina, silica, magnesium oxide, and MgTiO 3 having K'<30 and a TCK' >0 ppm/°C.
Claim 26
Dependent Claim
14 words
An electrical substrate as claimed in claim 23 wherein said fluoropolymeric matrix comprises polytetrafluoroethylene.
Claim 27
Dependent Claim
104 words
An electrical substrate composite material comprising: (1)a polybutadiene matrix; (2) particulate ceramic filler material, said filler material comprising a mixture of; (a) at least one first ceramic material selected from the group consisting of titania, CaTiO 3 , SrTiO 3 having a K'>30 and a TCK'<-300 ppm/°C., said mixture of ceramic fillers being proportioned in a ratio effective to provide the composite material with a K' of ≧5 and an absolute value TCK' of ≦200 ppm/°C.; and (b) at least one second ceramic material selected from the group consisting of alumina, silica, magnesium oxide, and MgTiO 3 having K'<30 and a TCK' >0 ppm/°C.
Claim 28
Dependent Claim
104 words
An electrical substrate composite material comprising: (1)a polybutadiene matrix; (2) particulate ceramic filler material, said filler material comprising a mixture of; (a) at least one first ceramic material selected from the group consisting of titania, CaTiO 3 , SrTiO 3 having a K'>30 and a TCK'<-300 ppm/°C., said mixture of ceramic fillers being proportioned in a ratio effective to provide the composite material with a K' of ≧5 and an absolute value TCK' of ≦200 ppm/°C.; and (b) at least one second ceramic material selected from the group consisting of alumina, silica, magnesium oxide, and MgTiO 3 having K'<30 and a TCK' >0 ppm/°C.
Claim 29
Dependent Claim
100 words
a circuit laminate comprising: (1) an electrical substrate composite material including; a polymeric matrix; particulate ceramic filler material, said filler material comprising a mixture of; (a) at least one first ceramic material having a K'>30 and a TCK'<-300 ppm/°C. said mixture of ceramic fillers being proportioned in a ratio effective to provide the composite material with a K' of ≧5 and an absolute value TCK' of ≦200 ppm/°C.; and (b) at least one second ceramic material having K'<30 and a TCK'>0 ppm/°C.; and (2) an electrically conductive layer laminated to at least a portion of a surface of said substrate.
Claim 30
Dependent Claim
100 words
a circuit laminate comprising: (1) an electrical substrate composite material including; a polymeric matrix; particulate ceramic filler material, said filler material comprising a mixture of; (a) at least one first ceramic material having a K'>30 and a TCK'<-300 ppm/°C. said mixture of ceramic fillers being proportioned in a ratio effective to provide the composite material with a K' of ≧5 and an absolute value TCK' of ≦200 ppm/°C.; and (b) at least one second ceramic material having K'<30 and a TCK'>0 ppm/°C.; and (2) an electrically conductive layer laminated to at least a portion of a surface of said substrate.
Claim 31
Dependent Claim
15 words
A circuit as claimed in claim 26 wherein said polymeric matrix is a fluoropolymeric matrix.
Claim 32
Dependent Claim
13 words
A circuit as claimed in claim 27 wherein said fluoropolymeric matrix is polytetrafluoroethylene.
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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) | 1999-09-03 | 2000-03-04 | 2000-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-03 | 2004-03-04 | 2004-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-03 | 2008-03-04 | 2008-09-03 | $7700.00 | Window Closed / Lapsed |