US5354611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric composite
Assignee: World Properties Inc
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Filing: 1993-05-28
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Granted: 1994-10-11
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Expires: 2013-05-28
Abstract
Abstract A composite material is disclosed. The material comprises a polymeric matrix and from about 20 volume percent to about 70 volume percent inorganic particles distributed throughout the matrix. Suitable inorganic particles include hollow inorganic microspheres and porous inorganic particles. The inorganic particles are coated with a surface coating. The composite material of the present invention exhibits a dielectric constant of less than about 2.5 and a thermal coefficient of expansion of less than about 70 ppm/°C.
Inventors
- 👤 David J. Arthur
- 👤 Gwo S. Swei
- 👤 Phong X. Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:34
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0373; C; C08; C08K; C08K7/00; C08K7/22; C08K7/24; C08K7/28; C08K9/00; C08K9/04; H05K1/032; H05K1/034; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0116; H05K2201/0137; H05K2201/015; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; H05K2201/0239; H05K2201/0242; H05K2201/0254; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/252; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/2996; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
74 words
A composite material, comprising: a polytetrafluoroethylene fluoropolymer matrix; from about 20 volume percent to about 70 volume percent first coated inorganic particles distributed throughout the matrix in a paste extrusion or calendering process, said first coated inorganic particles comprising hollow inorganic microspheres; and a hydrophobic coating on the microspheres; wherein the composite material exhibits a dielectric constant of less than about 2.5 and a thermal coefficient of expansion of less than about 70 ppm/°C.
Claim 2
Dependent Claim
74 words
A composite material, comprising: a polytetrafluoroethylene fluoropolymer matrix; from about 20 volume percent to about 70 volume percent first coated inorganic particles distributed throughout the matrix in a paste extrusion or calendering process, said first coated inorganic particles comprising hollow inorganic microspheres; and a hydrophobic coating on the microspheres; wherein the composite material exhibits a dielectric constant of less than about 2.5 and a thermal coefficient of expansion of less than about 70 ppm/°C.
Claim 3
Dependent Claim
17 words
The composite material of claim 1, wherein the hollow inorganic microspheres comprise glass microspheres or ceramic microspheres.
Claim 4
Dependent Claim
16 words
The composite material of claim 2, wherein the glass microspheres comprise silica glass or borosilicate glass.
Claim 5
Dependent Claim
24 words
The composite material of claim 1, wherein the hydropobic coating is selected from the group consisting of silane coatings, zirconate coatings and titanate coatings.
Claim 6
Dependent Claim
29 words
The composite material of claim 4, wherein the first coated inorganic particles comprises between about 3 to about 15 parts by weight coating per 100 parts by weight microspheres.
Claim 7
Dependent Claim
22 words
The composite material of claim 4, wherein the coating comprises phenyltrimethoxysilane, phenyltriethoxysilane, (3,3,3-trifluoropropyl) trimethoxysilane, (tridecafluoro-1,1,2,2 tetrahydrooctyl) 1,1 triethoxysilane, (heptadecafluoro-1,1,2,2-tetrahydrodecyl)-1-triethoxysilane and mixtures thereof.
Claim 8
Dependent Claim
17 words
The composite material of claim 4, wherein the coating comprises neopentyl(diallyl)oxytrineodecanoyl titanate, neopentyl(diallyl)oxytri(dodecyl)benzene-sulfonyl titanate or neopentyl(diallyl)oxytri(dioctyl)phosphate titanate.
Claim 9
Dependent Claim
15 words
The composite material of claim 4, wherein the coating comprises neopentyl(diallyl)oxytri(dioctyl)pyrophosphate zirconate or neopentyl(diallyl)oxytri(N-ethylenediamino)ethyl zirconate.
Claim 10
Dependent Claim
91 words
The composite material of claim 1, further comprising: up to about 35 volume percent of second coated inorganic particles distributed throughout the matrix, provided that the combined amount of the first and second coated inorganic particles does not exceed 70 volume percent, said second coated inorganic particles comprising inorganic particles selected from the group consisting of porous inorganic particles having a void space greater than about 20 volume % and an internal surface area of the voids being greater than about 150 m 2 /g, solid inorganic particles and mixtures thereof.
Claim 11
Dependent Claim
42 words
The composite material of claim 9, wherein the second coated inorganic particles comprise porous inorganic particles having a void space greater than about 20 vol % and an internal surface area of the voids being greater than about 150 m 2 /g.
Claim 12
Dependent Claim
19 words
The composite material of claim 10, wherein the porous inorganic particles comprises porous glass particles or porous ceramic particles.
Claim 13
Dependent Claim
15 words
The composite material of claim 11, wherein the porous glass particles comprise a silica glass.
Claim 14
Dependent Claim
15 words
The composite material of claim 9, wherein the second inorganic particles comprise solid inorganic particles.
Claim 15
Dependent Claim
16 words
The composite material of claim 13, wherein said solid inorganic particles are amorphous fused silica particles.
Claim 16
Dependent Claim
76 words
An electrical substrate material comprising: a polytetrafluoroethylene fluoropolymer matrix; from about 20 volume percent to about 70 volume percent first coated inorganic particles distributed throughout the matrix in a paste extrusion or calendering process, said first coated inorganic particles comprising hollow inorganic microspheres; and a hydrophobic coating on the microspheres; wherein the electrical substrate material exhibits a dielectric constant of less than about 2.5 and a thermal coefficient of expansion of less than about 70 ppm/°C.
Claim 17
Dependent Claim
76 words
An electrical substrate material comprising: a polytetrafluoroethylene fluoropolymer matrix; from about 20 volume percent to about 70 volume percent first coated inorganic particles distributed throughout the matrix in a paste extrusion or calendering process, said first coated inorganic particles comprising hollow inorganic microspheres; and a hydrophobic coating on the microspheres; wherein the electrical substrate material exhibits a dielectric constant of less than about 2.5 and a thermal coefficient of expansion of less than about 70 ppm/°C.
Claim 18
Dependent Claim
18 words
The electric substrate material of claim 15 wherein the hollow inorganic microspheres comprise glass microspheres or ceramic microspheres.
Claim 19
Dependent Claim
17 words
The electrical substrate material of claim 16 wherein the glass microspheres comprise silica glass or borosilicate glass.
Claim 20
Dependent Claim
25 words
The electrical substrate material of claim 15 wherein the hydrophobic coating is selected from the group consisting of silane coatings, zirconate coatings and titanate coatings.
Claim 21
Dependent Claim
29 words
The electrical substrate material of claim 18 wherein the first coated inorganic particles comprises between about 3 to about 15 parts by weight coating per 100 parts by weight.
Claim 22
Dependent Claim
23 words
The electrical substrate material of claim 18 wherein the coating comprises phenyltrimethoxysilane, phenyltriethoxysilane, (3,3,3-trifluoropropyl) trimethoxysilane, (tridecafluoro-1,1,2,2 tetrahydrooctyl) 1,1 triethoxysilane, (heptadecafluoro-1,1,2,2-tetrahydrodecyl)-1-triethoxysilane or mixtures thereof.
Claim 23
Dependent Claim
18 words
The electrical substrate material of claim 18 wherein the coating comprises neopentyl(diallyl)oxytrineodecanoyl titanate, neopentyl(dially)oxytri(dodecyl)benzene-sulfonyl titanate or neopentyl(diallyl)oxytri(dioctyl)phosphate titanate.
Claim 24
Dependent Claim
16 words
The electrical substrate material of claim 18 wherein the coating comprises neopentyl(diallyl)oxytri(dioctyl)-pyrophosphate zirconate or neopentyl(diallyl)oxytri(N-ethylenediamino)ethyl zirconate.
Claim 25
Dependent Claim
92 words
The electrical substrate material of claim 15 further comprising: up to about 35 volume percent of second coated inorganic particles distributed throughout the matrix, provided that the combined amount of the first and second coated inorganic particles does not exceed 70 volume percent, said second coated inorganic particles comprising inorganic particles selected from the group consisting of porous inorganic particles having a void space greater than about 20 volume % and an internal surface area of the voids being greater than about 150 m 2 /g, solid inorganic particles and mixtures thereof.
Claim 26
Dependent Claim
43 words
The electrical substrate material of claim 23 wherein the second coated inorganic particles comprise porous inorganic particles having a void space greater than about 20 volume % and an internal surface area of the voids being greater than about 150 m 2 /g.
Claim 27
Dependent Claim
20 words
The electrical substrate material of claim 24 wherein said porous inorganic particles comprises porous glass particles or porous ceramic particles.
Claim 28
Dependent Claim
16 words
The electrical substrate material of claim 25 wherein the porous glass particles comprise a silica glass.
Claim 29
Dependent Claim
16 words
The electrical substrate material of claim 23 wherein the second inorganic particles comprise solid inorganic particles.
Claim 30
Dependent Claim
17 words
The electrical substrate material of claim 27 wherein said solid inorganic particles are amorphous fused silica particles.
Claim 31
Dependent Claim
76 words
A composite material, consisting essentially of: a polytetrafluoroethylene fluoropolymer matrix; from about 20 volume percent to about 70 volume percent first coated inorganic particles distributed throughout the matrix in a paste extrusion or calendering process, said first coated inorganic particles comprising hollow inorganic microspheres; and a hydrophobic coating on the microspheres; wherein the composite material exhibits a dielectric constant of less than about 2.5 and a thermal coefficient of expansion of less than about 70 ppm/°C.
Claim 32
Dependent Claim
76 words
A composite material, consisting essentially of: a polytetrafluoroethylene fluoropolymer matrix; from about 20 volume percent to about 70 volume percent first coated inorganic particles distributed throughout the matrix in a paste extrusion or calendering process, said first coated inorganic particles comprising hollow inorganic microspheres; and a hydrophobic coating on the microspheres; wherein the composite material exhibits a dielectric constant of less than about 2.5 and a thermal coefficient of expansion of less than about 70 ppm/°C.
Claim 33
Dependent Claim
78 words
An electrical substrate material consisting essentially of: a polytetrafluoroethylene fluoropolymer matrix; from about 20 volume percent to about 70 volume percent first coated inorganic particles distributed throughout the matrix in a paste extrusion or calendering process, said first coated inorganic particles comprising hollow inorganic microspheres; and a hydrophobic coating on the microspheres; wherein the electrical substrate material exhibits a dielectric constant of less than about 2.5 and a thermal coefficient of expansion of less than about 70 ppm/°C.
Claim 34
Dependent Claim
78 words
An electrical substrate material consisting essentially of: a polytetrafluoroethylene fluoropolymer matrix; from about 20 volume percent to about 70 volume percent first coated inorganic particles distributed throughout the matrix in a paste extrusion or calendering process, said first coated inorganic particles comprising hollow inorganic microspheres; and a hydrophobic coating on the microspheres; wherein the electrical substrate material exhibits a dielectric constant of less than about 2.5 and a thermal coefficient of expansion of less than about 70 ppm/°C.
Claim 35
Dependent Claim
25 words
The material of claim 1 wherein: said paste extrusion process parameters corresponding to a pressure of about 12,000 psi through a 4.8 mm diameter die.
Claim 36
Dependent Claim
27 words
The material of claim 15 wherein: said paste extrusion process includes process parameters corresponding to a pressure of about 12,000 psi through a 4.8 mm diameter die.
Claim 37
Dependent Claim
27 words
The material of claim 29 wherein: said paste extrusion process includes process parameters corresponding to a pressure of about 12,000 psi through a 4.8 mm diameter die.
Claim 38
Dependent Claim
27 words
The material of claim 30 wherein: said paste extrusion process includes process parameters corresponding to a pressure of about 12,000 psi through a 4.8 mm diameter die.
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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) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |