A glass fiber having a low dielectric constant and low dielectric loss tangent consists essentially of by weight, as a glass composition, 52 to 60% of SiO2, 11 to 16% of Al2O3, 20 to 30% of B2O3, and 4 to 8% of CaO, and substantially no MgO, substantially no Li2O, substantially no Na2O, substantiall
A glass fiber having a low dielectric constant and low dielectric loss tangent consists essentially of by weight, as a glass composition, 52 to 60% of SiO2, 11 to 16% of Al2O3, 20 to 30% of B2O3, and 4 to 8% of CaO, and substantially no MgO, substantially no Li2O, substantially no Na2O, substantially no K2O, and substantially no Ti2O. The glass fiber also may contain up to 2% F2 by weight. The glass fiber is ideal for use as reinforcement for printed wiring boards, and has excellent dielectric properties at frequencies of about 18 GHz or higher.
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What is claimed is: 1. A low-dielectric-constant glass fiber consisting essentially of 52 to 60% of SiO2, 11 to 16% of Al2O3, 20 to 30% of B2O3, and 4 to 8% of CaO, by weight, as a glass composition. 2. The low-dielectric-constant glass fiber of claim 1, wherein the glass fiber consists essential
What is claimed is: 1. A low-dielectric-constant glass fiber consisting essentially of 52 to 60% of SiO2, 11 to 16% of Al2O3, 20 to 30% of B2O3, and 4 to 8% of CaO, by weight, as a glass composition. 2. The low-dielectric-constant glass fiber of claim 1, wherein the glass fiber consists essentially of 53 to 58% of SiO2, 11 to 15% of Al2O3, 22 to 27% of B2O3, and 5 to 8% of CaO by weight, as a glass composition. 3. The low-dielectric-constant glass fiber of claim 1, wherein the glass fiber consists essentially of 54 to 58% of SiO2, 11 to 14% of Al2O3, 24 to 27% of B2O3, and 5 to 6% of CaO by weight, as a glass composition. 4. The low-dielectric-constant glass fiber of claim 1, wherein the glass fiber further contains up to about 2% F2 by weight. 5. The low-dielectric-constant glass fiber of claim 2, wherein the glass fiber further contains up to about 2% F2 by weight. 6. The low-dielectric-constant glass fiber of claim 3, wherein the glass fiber further contains up to about 2% F2 by weight. 7. The low-dielectric-constant glass fiber of claim 1, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 5×10−4 at a frequency of 1 MHz at room temperature. 8. The low-dielectric-constant glass fiber of claim 2, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 5×10−4 at a frequency of 1 MHz at room temperature. 9. The low-dielectric-constant glass fiber of claim 3, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 5×10−4 at a frequency of 1 MHz at room temperature. 10. The low-dielectric-constant glass fiber of claim 1, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 32×10−4 at a frequency of 10 GHz at room temperature. 11. The low-dielectric-constant glass fiber of claim 2, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 32×10−4 at a frequency of 10 GHz at room temperature. 12. The low-dielectric-constant glass fiber of claim 3 wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 32×10−4 at a frequency of 10 GHz at room temperature. 13. The low-dielectric-constant glass fiber of claim 1, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 30×10−4 at a frequency of 18 GHz at room temperature. 14. The low-dielectric-constant glass fiber of claim 2, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 30×10−4 at a frequency of 18 GHz at room temperature. 15. The low-dielectric-constant glass fiber of claim 3 wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 30×10−4 at a frequency of 18 GHz at room temperature. 16. A product comprising a glass fiber according to claim 1, the product being selected from the group consisting of a printed circuit board, a woven fabric, a non-woven fabric, a unidirectional fabric, a chopped strand, a chopped strand mat, a composite material, and a communication signal transport medium. 17. A product comprising a glass fiber according to claim 2, the product being selected from the group consisting of a printed circuit board, a woven fabric, a non-woven fabric, a unidirectional fabric, a chopped strand, a chopped strand mat, a composite material, and a communication signal transport medium. 18. A product comprising a glass fiber according to claim 3, the product being selected from the group consisting of a printed circuit board, a woven fabric, a non-woven fabric, a unidirectional fabric, a chopped strand, a chopped strand mat, a composite material, and a communication signal transport medium. 19. A low-dielectric-constant glass fiber comprising 52 to 60% of SiO2, 11 to 16% of Al2O3, 20 to 30% of B2O3, and 4 to 8% of CaO, by weight, as a glass composition, and comprising substantially no MgO, substantially no Li2O, substantially no Na2O, substantially no K2O, and substantially no TiO2. 20. The low-dielectric-constant glass fiber of claim 19, wherein the glass fiber comprises 53 to 58% of SiO2, 11 to 15% of Al2O3, 22 to 27% of B2O3, and 5 to 8% of CaO by weight, as a glass composition, and comprises substantially no MgO, substantially no Li2O, substantially no Na2O, substantially no K2O, and substantially no TiO2. 21. The low-dielectric-constant glass fiber of claim 19, wherein the glass fiber comprises 54 to 58% of SiO2, 11 to 14% of Al2O3, 24 to 27% of B2O3, and 5 to 6% of CaO by weight, as a glass composition, and comprises substantially no MgO, substantially no Li2O, substantially no Na2O, substantially no K2O, and substantially no TiO2. 22. The low-dielectric-constant glass fiber of claim 19, wherein the glass fiber further contains up to about 2% F2 by weight. 23. The low-dielectric-constant glass fiber of claim 20, wherein the glass fiber further contains up to about 2% F2 by weight. 24. The low-dielectric-constant glass fiber of claim 21, wherein the glass fiber further contains up to about 2% F2 by weight. 25. The low-dielectric-constant glass fiber of claim 19, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 5×10−4 at a frequency of 1 MHz at room temperature. 26. The low-dielectric-constant glass fiber of claim 20, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 5×10−4 at a frequency of 1 MHz at room temperature. 27. The low-dielectric-constant glass fiber of claim 21, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 5×10−4 at a frequency of 1 MHz at room temperature. 28. The low-dielectric-constant glass fiber of claim 19, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 32×10−4 at a frequency of 10 GHz at room temperature. 29. The low-dielectric-constant glass fiber of claim 20, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 32×10−4 at a frequency of 10 GHz at room temperature. 30. The low-dielectric-constant glass fiber of claim 21 wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 32×10−4 at a frequency of 10 GHz at room temperature. 31. The low-dielectric-constant glass fiber of claim 19, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 30×10−4 at a frequency of 18 GHz at room temperature. 32. The low-dielectric-constant glass fiber of claim 20, wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 30×10−4 at a frequency of 18 GHz at room temperature. 33. The low-dielectric-constant glass fiber of claim 21 wherein the glass fiber has a dielectric constant less than or equal to about 5, and a dielectric loss tangent less than or equal to about 30×10−4 at a frequency of 18 GHz at room temperature. 34. A product comprising a glass fiber according to claim 19, the product being selected from the group consisting of a printed circuit board, a woven fabric, a non-woven fabric, a unidirectional fabric, a chopped strand, a chopped strand mat, a composite material, and a communication signal transport medium. 35. A product comprising a glass fiber according to claim 20, the product being selected from the group consisting of a printed circuit board, a woven fabric, a non-woven fabric, a unidirectional fabric, a chopped strand, a chopped strand mat, a composite material, and a communication signal transport medium. 36. A product comprising a glass fiber according to claim 21, the product being selected from the group consisting of a printed circuit board, a woven fabric, a non-woven fabric, a unidirectional fabric, a chopped strand, a chopped strand mat, a composite material, and a communication signal transport medium.
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이 특허에 인용된 특허 (9)
Eastes Walter L. ; Hofmann Douglas A. ; Wingert John W., Boron-free glass fibers.
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