US4849284A
Expired / Lapsed
US
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Electrical substrate material
Assignee: World Properties Inc
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Filing: 1987-02-17
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Granted: 1989-07-18
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Expires: 2007-02-17
Abstract
Abstract A ceramic filled fluoropolymer-based electrical substrate material well suited for forming rigid printed wiring board substrate materials and integrated circuit chip carriers is presented which exhibits improved electrical performance over other printed wiring board materials and circuit chip carriers. Also, the low coefficients of thermal expansion and compliant nature of this electrical substrate material results in improved surface mount reliability and plated through-hole reliability. The electrical substrate material preferably comprises polytetrafluoroethylene filled with silica along with a small amount of microfiberglass. In an important feature of this invention, the ceramic filler (silica) is coated with a silane coating material which renders the surface of the ceramic hydrophobic and provides improved tensile strength, peel strength and dimensional stability.
Inventors
- 👤 David J. Arthur
- 👤 John C. Mosko
- 👤 Connie S. Jackson
- 👤 G. Robert Traut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:00
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0373; C; C08; C08K; C08K9/00; C08K9/04; C08K9/06; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/443; H01B3/445; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/695; H05K1/032; H05K1/034; H05K1/0366; H05K1/05; H05K1/056; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/015; H05K2201/0183; H05K2201/0195; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; H05K2201/0239; H05K2201/0242; H05K2201/0251; H05K2201/06; H05K2201/068; H05K3/00; H05K3/38; H05K3/389; H05K3/46; H05K3/4611; H05K3/4626; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/25; Y10T428/252; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
56 words
An electrical substrate material comprising: fluoropolymeric material; ceramic filler material, said filler material being in an amount of at least about 55 weight percent of the total substrate material; said ceramic filler being coated with a silane coating; at least one layer of metal being disposed on at least a portion of said electrical substrate material.
Claim 2
Dependent Claim
56 words
An electrical substrate material comprising: fluoropolymeric material; ceramic filler material, said filler material being in an amount of at least about 55 weight percent of the total substrate material; said ceramic filler being coated with a silane coating; at least one layer of metal being disposed on at least a portion of said electrical substrate material.
Claim 3
Dependent Claim
9 words
The material of claim 1 including: fiber reinforcement material.
Claim 4
Dependent Claim
21 words
The material of claim 2 wherein: said fiber reinforcement material has a weight percent of equal to or less than 2%.
Claim 5
Dependent Claim
13 words
The material of claim 2 wherein: said fiber reinforcement material is glass fiber.
Claim 6
Dependent Claim
12 words
The material of claim 4 wherein: said glass fiber is microglass fiber.
Claim 7
Dependent Claim
24 words
The material of claim 1 wherein said fluoropolymeric material is selected from the group comprising: polytetrafluoroethylene, hexa fluoropropene, tetrafluoroethylene or perfluoro alkyl vinyl ether.
Claim 8
Dependent Claim
11 words
The material of claim 1 wherein said ceramic filler comprises silica.
Claim 9
Dependent Claim
13 words
The material of claim 7 wherein said silica comprises amorphous fused silica powder.
Claim 10
Dependent Claim
37 words
The material of claim 1 wherein said silane coating is selected from the group comprising: p-chloromethyl phenyl trimethoxy silane, amino ethyl amino trimethoxy silane, a mixture of phenyl trimethoxy silane and amino ethyl amino propyl trimethoxy silane.
Claim 11
Dependent Claim
27 words
The material of claim 1 wherein: said silane coating is in an amount of at least 1 weight percent relative to the weight of the ceramic filler.
Claim 12
Dependent Claim
24 words
The material of claim 1 wherein said ceramic filler comprises particles and wherein the mean particle size varies from about 10 to 15 μm.
Claim 13
Dependent Claim
68 words
In a multilayer circuit including at least a first circuit layer and a second circuit layer, the improvement comprising: an adhesive layer sandwiched between the first and second circuit layers, said adhesive layer comprising: fluoropolymeric material; ceramic filler material, said filler material being in an amount of at least about 55 weight percent of the total adhesive layer; and said ceramic filler being coated with a silane coating.
Claim 14
Dependent Claim
68 words
In a multilayer circuit including at least a first circuit layer and a second circuit layer, the improvement comprising: an adhesive layer sandwiched between the first and second circuit layers, said adhesive layer comprising: fluoropolymeric material; ceramic filler material, said filler material being in an amount of at least about 55 weight percent of the total adhesive layer; and said ceramic filler being coated with a silane coating.
Claim 15
Dependent Claim
13 words
The multilayer circuit of claim 12 including: at least one plated through hole.
Claim 16
Dependent Claim
10 words
The multilayer circuit of claim 12 including: fiber reinforcement material.
Claim 17
Dependent Claim
22 words
The multilayer circuit of claim 14 wherein: said fiber reinforcement material has a weight percent of equal to or less than 2%.
Claim 18
Dependent Claim
14 words
The multilayer circuit of claim 14 wherein: said fiber reinforcement material is glass fiber.
Claim 19
Dependent Claim
13 words
The multilayer circuit of claim 16 wherein: said glass fiber is microglass fiber.
Claim 20
Dependent Claim
25 words
The multilayer circuit of claim 12 wherein said fluoropolymeric material is selected from the group comprising: polytetrafluoroethylene, hexa fluoropropene, tetrafluoroethylene or perfluoro alkyl vinyl ether.
Claim 21
Dependent Claim
12 words
The multilayer circuit of claim 12 wherein said ceramic filler comprises silica.
Claim 22
Dependent Claim
14 words
The multilayer circuit of claim 19 wherein said silica comprises amorphous fused silica powder.
Claim 23
Dependent Claim
38 words
The multilayer circuit of claim 12 wherein said silane coating is selected from the group comprising: p-chloromethyl phenyl trimethoxy silane, amino ethyl amino trimethoxy silane, a mixture of phenyl trimethoxy silane and amino ethyl amino propyl trimethoxy silane.
Claim 24
Dependent Claim
28 words
The multilayer circuit of claim 12 wherein: said silane coating is in an amount of at least 1 weight percent relative to the weight of the ceramic filler.
Claim 25
Dependent Claim
25 words
The multilayer circuit of claim 12 wherein said ceramic filler comprises particles and wherein the mean particle size varies from about 10 to 15 μm.
Claim 26
Dependent Claim
57 words
An electrical substrate material comprising: fluoropolymeric material; ceramic filler material, said filler material being in an amount of at least about 50 volume percent of the total substrate material; said ceramic filler being coated by a silane coating; and at least one layer of metal being disposed on at least a portion of said electrical substrate material.
Claim 27
Dependent Claim
57 words
An electrical substrate material comprising: fluoropolymeric material; ceramic filler material, said filler material being in an amount of at least about 50 volume percent of the total substrate material; said ceramic filler being coated by a silane coating; and at least one layer of metal being disposed on at least a portion of said electrical substrate material.
Claim 28
Dependent Claim
9 words
The material of claim 24 including: fiber reinforcement material.
Claim 29
Dependent Claim
13 words
The material of claim 25 wherein: said fiber reinforcement material is glass fiber.
Claim 30
Dependent Claim
12 words
The material of claim 26 wherein: said glass fiber is microglass fiber.
Claim 31
Dependent Claim
24 words
The material of claim 24 wherein said fluoropolymeric material is selected from the group comprising: polytetrafluoroethylene, hexa fluoropropene, tetrafluoroethylene or perfluoro alkyl vinyl ether.
Claim 32
Dependent Claim
11 words
The material of claim 28 wherein said ceramic filler comprises silica.
Claim 33
Dependent Claim
13 words
The material of claim 29 wherein said silica comprises amorphous fused silica powder.
Claim 34
Dependent Claim
37 words
The material of claim 24 wherein said silane coating is selected from the group comprising: p-chloromethyl phenyl trimethoxy silane, amino ethyl amino trimethoxy silane, a mixture of phenyl trimethoxy silane and amino ethyl amino propyl trimethoxy silane.
Claim 35
Dependent Claim
24 words
The material of claim 24 wherein said ceramic filler comprises particles and wherein the mean particle size varies from about 10 to 15 μm.
Claim 36
Dependent Claim
68 words
In a multilayer circuit including at least a first circuit layer and a second circuit layer, the improvement comprising: an adhesive layer sandwiched between the first and second circuit layers, said adhesive layer comprising: fluoropolymeric material; ceramic filler material, said filler material being in an amount of at least about 50 volume percent of the total adhesive layer; and said ceramic filler being coated with a silane coating.
Claim 37
Dependent Claim
68 words
In a multilayer circuit including at least a first circuit layer and a second circuit layer, the improvement comprising: an adhesive layer sandwiched between the first and second circuit layers, said adhesive layer comprising: fluoropolymeric material; ceramic filler material, said filler material being in an amount of at least about 50 volume percent of the total adhesive layer; and said ceramic filler being coated with a silane coating.
Claim 38
Dependent Claim
13 words
The multilayer circuit of claim 33 including: at least one plated through hole.
Claim 39
Dependent Claim
10 words
The multiplayer circuit of claim 33 including: fiber reinforcement material.
Claim 40
Dependent Claim
14 words
The multilayer circuit of claim 35 wherein: said fiber reinforcement material is glass fiber.
Claim 41
Dependent Claim
13 words
The multilayer circuit of claim 36 wherein: said glass fiber is microglass fiber.
Claim 42
Dependent Claim
25 words
The multiplayer circuit of claim 33 wherein said fluoropolymeric material is selected from the group comprising: polytetrafluoroethylene, hexa fluoropropene, tetrafluoroethylene or perfluoro alkyl vinyl ether.
Claim 43
Dependent Claim
12 words
The multilayer circuit of claim 33 wherein said ceramic filler comprises silica.
Claim 44
Dependent Claim
14 words
The multilayer circuit of claim 39 wherein said silica comprises amorphous fused silica powder.
Claim 45
Dependent Claim
38 words
The multilayer circuit of claim 33 wherein said silane coating is selected from the group comprising: p-chloromethyl phenyl trimethoxy silane, amino ethyl amino trimethoxy silane, a mixture of phenyl trimethoxy silane and amino ethyl amino propyl trimethoxy silane.
Claim 46
Dependent Claim
25 words
The multilayer circuit of claim 33 wherein said ceramic filler comprises particles and wherein the mean particle size varies from about 10 to 15 μm.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |