US4886699A
Expired / Lapsed
US
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Glass fiber reinforced fluoropolymeric circuit laminate
Assignee: Rogers Corp
•
Filing: 1987-10-26
•
Granted: 1989-12-12
•
Expires: 2007-10-26
Abstract
Abstract A fluoropolymeric circuit laminate consisting of one or more layers of fluoropolymer impregnated woven glass cloth sandwiched between one or more layers of "random" microfiberglass reinforced fluoropolymer is presented. This composite of fluoropolymer, woven glass fabric and random glass microfibers may be clad on one or both outer surfaces with a suitable conductive material such as copper or certain known resistive foils. The fluoropolymer impregnated woven glass layer or layers will be nested between microfiberglass reinforced fluoropolymer layers to provide the outer surfaces of the circuit with smooth surfaces for fine line circuitry. The circuit laminate of the present invention exhibits good dimensional stability, smooth surfaces for fine line circuitry, good electrical properties, and strong foil and interlaminar adhesion properties.
Inventors
- 👤 James R. Carroll
- 👤 Leon W. McGinnis
- 👤 Terry L. Miller
- 👤 Michael B. Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:04
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/14; B32B15/20; B32B27/00; B32B27/32; B32B27/322; B32B5/00; B32B5/02; B32B5/024; B32B5/22; B32B5/24; B32B5/26; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/036; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/023; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/10; B32B2262/101; B32B2457/00; B32B2457/08; H05K1/16; H05K1/167; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/015; H05K2201/02; H05K2201/0203; H05K2201/0242; H05K2201/0251; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/25; Y10T428/252; Y10T428/254; Y10T428/26; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/3415; Y10T442/3431; Y10T442/3439
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
126 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: at least one first layer of a fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; at least one second layer of a random microglass reinforced fluoropolymer on said first surface of said first layer of fluoropolymer impregnated woven glass cloth; and at least one third layer of a random microglass reinforced fluoropolymer on said second surface of said first layer of fluoropolymer impregnated woven glass cloth; said second and third layers of random microglass reinforced fluoropolymer providing smooth outer surfaces to said circuit substrate laminate; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 2
Dependent Claim
126 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: at least one first layer of a fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; at least one second layer of a random microglass reinforced fluoropolymer on said first surface of said first layer of fluoropolymer impregnated woven glass cloth; and at least one third layer of a random microglass reinforced fluoropolymer on said second surface of said first layer of fluoropolymer impregnated woven glass cloth; said second and third layers of random microglass reinforced fluoropolymer providing smooth outer surfaces to said circuit substrate laminate; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 3
Dependent Claim
160 words
A circuit laminate for microwave frequency applications consisting essentially of: at least one first layer of a fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; at least one second layer of a random microglass reinforced fluoropolymer on said first surface of said first layer of fluoropolymer impregnated woven glass cloth; at least one third layer of a random microglass reinforced fluoropolymer on said second surface of said first layer of fluoropolymer impregnated woven glass cloth wherein each of said second and third microglass reinforced fluoropolymer layers includes a smooth outer surface opposite said at least one layer of fluoropolymer impregnated woven glass cloth; and conductive material on at least a portion of at least one of said smooth outer surfaces of said second and third layers of microglass reinforced fluoropolymer; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 4
Dependent Claim
160 words
A circuit laminate for microwave frequency applications consisting essentially of: at least one first layer of a fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; at least one second layer of a random microglass reinforced fluoropolymer on said first surface of said first layer of fluoropolymer impregnated woven glass cloth; at least one third layer of a random microglass reinforced fluoropolymer on said second surface of said first layer of fluoropolymer impregnated woven glass cloth wherein each of said second and third microglass reinforced fluoropolymer layers includes a smooth outer surface opposite said at least one layer of fluoropolymer impregnated woven glass cloth; and conductive material on at least a portion of at least one of said smooth outer surfaces of said second and third layers of microglass reinforced fluoropolymer; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 5
Dependent Claim
110 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: a core of one or more layers of fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; one or more layers of a random microglass reinforced fluoropolymer adhered to said first surface of said core; one or more layers of a random microglass reinforced fluoropolymer adhered to said second surface of said core; and said layers of random microglass reinforced fluoropolymer providing smooth outer surfaces to said circuit substrate laminate; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 6
Dependent Claim
110 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: a core of one or more layers of fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; one or more layers of a random microglass reinforced fluoropolymer adhered to said first surface of said core; one or more layers of a random microglass reinforced fluoropolymer adhered to said second surface of said core; and said layers of random microglass reinforced fluoropolymer providing smooth outer surfaces to said circuit substrate laminate; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 7
Dependent Claim
137 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: a core of one or more layers of fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; one or more layers of a random microglass reinforced fluoropolymer adhered to said first surface of said core; one or more layers of a random microglass reinforced fluoropolymer adhered to said second surface of said core wherein said microglass reinforced fluoropolymer layers comprises a smooth outer surface opposite said core of fluoropolymer impregnated woven glass cloth; and conductive material on at least a portion of at least one of said smooth outer surfaces of said layers of microglass reinforced fluoropolymer; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 8
Dependent Claim
137 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: a core of one or more layers of fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; one or more layers of a random microglass reinforced fluoropolymer adhered to said first surface of said core; one or more layers of a random microglass reinforced fluoropolymer adhered to said second surface of said core wherein said microglass reinforced fluoropolymer layers comprises a smooth outer surface opposite said core of fluoropolymer impregnated woven glass cloth; and conductive material on at least a portion of at least one of said smooth outer surfaces of said layers of microglass reinforced fluoropolymer; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 9
Dependent Claim
139 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: at least one first layer of a fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; at least one second layer of a random microglass reinforced fluoropolymer on said first surface of said first layer of fluoropolymer impregnated woven glass cloth; and at least one third layer of a random microglass reinforced fluoropolymer on said second surface of said first layer of fluoropolymer impregnated woven glass cloth; said second and third layers of random microglass reinforced fluoropolymer providing smooth outer surfaces to said circuit substrate laminate; said circuit substrate laminate having a dissipation factor of between 0.00172 to 0.00092; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 10
Dependent Claim
139 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: at least one first layer of a fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; at least one second layer of a random microglass reinforced fluoropolymer on said first surface of said first layer of fluoropolymer impregnated woven glass cloth; and at least one third layer of a random microglass reinforced fluoropolymer on said second surface of said first layer of fluoropolymer impregnated woven glass cloth; said second and third layers of random microglass reinforced fluoropolymer providing smooth outer surfaces to said circuit substrate laminate; said circuit substrate laminate having a dissipation factor of between 0.00172 to 0.00092; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 11
Dependent Claim
62 words
The laminate of claim 5 wherein each of said smooth outer surfaces of said second and third microglass reinforced fluoropolymer layers are opposite said at least one layer of fluoropolymer impregnated woven glass cloth and including: conductive material on at least a portion of at least one of said smooth outer surfaces of said second and third layers of microglass reinforced fluoropolymer.
Claim 12
Dependent Claim
11 words
The laminate of claim 6 wherein: said conductive material is copper.
Claim 13
Dependent Claim
13 words
The laminate of claim 6 wherein: said conductive material is a resistive foil.
Claim 14
Dependent Claim
22 words
The laminate of claim 5 wherein: said fluoropolymer impregnated woven glass cloth layer has about 30 to 85 weight percent of fluoropolymer.
Claim 15
Dependent Claim
27 words
The laminate of claim 5 wherein: said at least one fluoropolymer impregnated woven glass cloth layer comprises about 10 to 60 percent of the total laminate thickness.
Claim 16
Dependent Claim
32 words
The laminate of claim 5 wherein said microglass is microfiberglass and wherein said microfiberglass has a length of less than 5000 micrometers and a diameter of between about 0.3 to 0.7 micrometers.
Claim 17
Dependent Claim
23 words
The laminate of claim 5 wherein: each of said layers of microglass reinforced fluoropolymer comprises about 2 to 25 weight percent of microglass.
Claim 18
Dependent Claim
23 words
The laminate of claim 11 wherein: each of said layers of microglass reinforced fluoropolymer comprises about 2 to 25 weight percent of microglass.
Claim 19
Dependent Claim
19 words
The laminate of claim 5 wherein: said laminate has a total thickness of between about 0.003 to 0.500 inch.
Claim 20
Dependent Claim
21 words
The laminate of claim 6 including; a fluoropolymeric bonding layer between said conductive material and said layer of microglass reinforced fluoropolymer.
Claim 21
Dependent Claim
173 words
A circuit laminate for microwave frequency applications consisting essentially of: at least one first layer of a fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; at least one second layer of a random microglass reinforced fluoropolymer on said first surface of said first layer of fluoropolymer impregnated woven glass cloth; at least one third layer of a random microglass reinforced fluoropolymer on said second surface of said first layer of fluoropolymer impregnated woven glass cloth wherein each of said second and third microglass reinforced fluoropolymer layers includes a smooth outer surface opposite said at least one layer of fluoropolymer impregnated woven glass cloth; and conductive material on at least a portion of at least one of said smooth outer surfaces of said second and third layers of microglass reinforced fluoropolymer; said circuit substrate laminate having a dissipation factor of between 0.00172 to 0.00092; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 22
Dependent Claim
173 words
A circuit laminate for microwave frequency applications consisting essentially of: at least one first layer of a fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; at least one second layer of a random microglass reinforced fluoropolymer on said first surface of said first layer of fluoropolymer impregnated woven glass cloth; at least one third layer of a random microglass reinforced fluoropolymer on said second surface of said first layer of fluoropolymer impregnated woven glass cloth wherein each of said second and third microglass reinforced fluoropolymer layers includes a smooth outer surface opposite said at least one layer of fluoropolymer impregnated woven glass cloth; and conductive material on at least a portion of at least one of said smooth outer surfaces of said second and third layers of microglass reinforced fluoropolymer; said circuit substrate laminate having a dissipation factor of between 0.00172 to 0.00092; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 23
Dependent Claim
11 words
The laminate of claim 16 wherein: said conductive material is copper.
Claim 24
Dependent Claim
13 words
The laminate of claim 16 wherein: said conductive material is a resistive foil.
Claim 25
Dependent Claim
22 words
The laminate of claim 16 wherein: said fluoropolymer impregnated woven glass cloth layer has about 30 to 85 weight percent of fluoropolymer.
Claim 26
Dependent Claim
27 words
The laminate of claim 16 wherein: said at least one fluoropolymer impregnated woven glass cloth layer comprises about 10 to 60 percent of the total laminate thickness.
Claim 27
Dependent Claim
32 words
The laminate of claim 16 wherein said microglass is microfiberglass and wherein said microfiberglass has a length of less than 5000 micrometers and a diameter of between about 0.3 to 0.7 micrometers.
Claim 28
Dependent Claim
23 words
The laminate of claim 16 wherein: each of said layers of microglass reinforced fluoropolymer comprises about 2 to 25 weight percent of microglass.
Claim 29
Dependent Claim
23 words
The laminate of claim 20 wherein: each of said layers of microglass reinforced fluoropolymer comprises about 2 to 25 weight percent of microglass.
Claim 30
Dependent Claim
45 words
The laminate of claim 16 wherein said first layer of fluoropolymer impregnated woven glass cloth and said first and second layers of microglass reinforced fluoropolymer define a laminate substrate and wherein: said laminate substrate has a total thickness of between about 0.003 to 0.500 inch.
Claim 31
Dependent Claim
21 words
The laminate of claim 16 including: a fluoropolymeric bonding layer between said conductive material and said layer of microglass reinforced fluoropolymer.
Claim 32
Dependent Claim
123 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: a core of one or more layers of fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; one or more layers of a random microglass reinforced fluoropolymer adhered to said first surface of said core; one or more layers of a random microglass reinforced fluoropolymer adhered to said second surface of said core; and said layers of random microglass reinforced fluoropolymer providing smooth outer surfaces to said circuit substrate laminate; said circuit substrate laminate having a dissipation factor of between 0.00172 to 0.00092; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 33
Dependent Claim
123 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: a core of one or more layers of fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; one or more layers of a random microglass reinforced fluoropolymer adhered to said first surface of said core; one or more layers of a random microglass reinforced fluoropolymer adhered to said second surface of said core; and said layers of random microglass reinforced fluoropolymer providing smooth outer surfaces to said circuit substrate laminate; said circuit substrate laminate having a dissipation factor of between 0.00172 to 0.00092; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 34
Dependent Claim
29 words
The laminate of claim 26 including: conductive material on at least a portion of at least one of said smooth outer surfaces of said layers of microglass reinforced fluoropolymer.
Claim 35
Dependent Claim
11 words
The laminate of claim 27 wherein: said conductive material is copper.
Claim 36
Dependent Claim
13 words
The laminate of claim 27 wherein: said conductive material is a resistive foil.
Claim 37
Dependent Claim
22 words
The laminate of claim 26 wherein: said fluoropolymer impregnated woven glass cloth layer has about 30 to 85 weight percent of fluoropolymer.
Claim 38
Dependent Claim
27 words
The laminate of claim 26 wherein: said at least one fluoropolymer impregnated woven glass cloth layer comprises about 10 to 60 percent of the total laminate thickness.
Claim 39
Dependent Claim
32 words
The laminate of claim 26 wherein said microglass is microfiberglass and wherein said microfiberglass has a length of less than 5000 micrometers and a diameter of between about 0.3 to 0.7 micrometers.
Claim 40
Dependent Claim
23 words
The laminate of claim 26 wherein: each of said layers of microglass reinforced fluoropolymer comprises about 2 to 25 weight percent of microglass.
Claim 41
Dependent Claim
19 words
The laminate of claim 26 wherein: said laminate has a total thickness of between about 0.003 to 0.500 inch.
Claim 42
Dependent Claim
21 words
The laminate of claim 27 including: a fluoropolymeric bonding layer between said conductive material and said layer of microglass reinforced fluoropolymer.
Claim 43
Dependent Claim
150 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: a core of one or more layers of fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; one or more layers of a random microglass reinforced fluoropolymer adhered to said first surface of said core; one or more layers of a random microglass reinforced fluoropolymer adhered to said second surface of said core wherein said microglass reinforced fluoropolymer layers comprises a smooth outer surface opposite said core of fluoropolymer impregnated woven glass cloth; and conductive material on at least a portion of at least one of said smooth outer surfaces of said layers of microglass reinforced fluoropolymer; said circuit substrate laminate having a dissipation factor of between 0.00172 to 0.00092; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluorethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 44
Dependent Claim
150 words
A circuit substrate laminate for microwave frequency applications consisting essentially of: a core of one or more layers of fluoropolymer impregnated woven glass cloth having opposed first and second surfaces; one or more layers of a random microglass reinforced fluoropolymer adhered to said first surface of said core; one or more layers of a random microglass reinforced fluoropolymer adhered to said second surface of said core wherein said microglass reinforced fluoropolymer layers comprises a smooth outer surface opposite said core of fluoropolymer impregnated woven glass cloth; and conductive material on at least a portion of at least one of said smooth outer surfaces of said layers of microglass reinforced fluoropolymer; said circuit substrate laminate having a dissipation factor of between 0.00172 to 0.00092; and wherein said fluoropolymer is at least one of the fluoropolymers selected from the group consisting of polytetrafluorethylene and a copolymer of tetrafluoroethylene and perfluoroakyl vinyl ether.
Claim 45
Dependent Claim
11 words
The laminate of claim 36 wherein: said conductive material is copper.
Claim 46
Dependent Claim
13 words
The laminate of claim 36 wherein: said conductive material is a resistive foil.
Claim 47
Dependent Claim
22 words
The laminate of claim 36 wherein: said fluoropolymer impregnated woven glass cloth layer has about 30 to 85 weight percent of fluoropolymer.
Claim 48
Dependent Claim
27 words
The laminate of claim 36 wherein: said at least one fluoropolymer impregnated woven glass cloth layer comprises about 10 to 60 percent of the total laminate thickness.
Claim 49
Dependent Claim
32 words
The laminate of claim 36 wherein said microglass is microfiberglass and wherein said microfiberglass has a length of less than 5000 micrometers and a diameter of between about 0.3 to 0.7 micrometers.
Claim 50
Dependent Claim
23 words
The laminate of claim 36 wherein: each of said layers of microglass reinforced fluoropolymer comprises about 2 to 25 weight percent of microglass.
Claim 51
Dependent Claim
41 words
The laminate of claim 36 wherein said core of fluoropolymer impregnated woven glass cloth and said layers of microglass reinforced fluoropolymer define a laminate substrate and wherein: said laminate substrate has a total thickness of between about 0.003 to 0.500 inch.
Claim 52
Dependent Claim
21 words
The laminate of claim 36 including: a fluoropolymeric bonding layer between said conductive material and said layer of microglass reinforced fluoropolymer.
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) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |