Claims
- 1. A tunable dielectric material comprising:
a tunable dielectric ceramic; and a low loss glass additive.
- 2. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises boron-containing glass, calcium-containing glass and/or aluminum-containing glass.
- 3. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises B and at least one other element selected from Si, Al, Li, Na, K, Ba, Zn, Mn and Ca.
- 4. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises Ca and at least one other element selected from B, Al, Si, Ba, Zn, Li, Mn and Sr.
- 5. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises Al and at least one other element selected from Si, B, Li, Na, K, Ba, Zn, Mn, Ca, Sr and Mg.
- 6. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises borosilicate glass.
- 7. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises lithia potash borosilicate glass.
- 8. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises B, Ca and Al.
- 9. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises from about 0.1 to about 60 weight percent of the material.
- 10. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises from about 0.1 to about 25 weight percent of the material.
- 11. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises from about 0.5 to about 15 weight percent of the material.
- 12. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises at least about 2 weight percent of the material.
- 13. The tunable dielectric material of claim 1, wherein the low loss glass additive comprises at least about 3 weight percent of the material.
- 14. The tunable dielectric material of claim 1, wherein the low loss glass additive has a dielectric loss of less than about 0.003 at a frequency of 2 GHz.
- 15. The tunable dielectric material of claim 1, wherein the tunable dielectric ceramic is selected from barium strontium titanate, barium titanate, strontium titanate, barium calcium titanate, barium calcium zirconium titanate, lead titanate, lead zirconium titanate, lead lanthanum zirconium titanate, lead niobate, lead tantalate, potassium strontium niobate, sodium barium niobate/potassium phosph ate, potassium niobate, lithium niobate, lithium tantalate, lanthanum tantalate, barium calcium zirconium titanate, sodium nitrate, and combinations thereof.
- 16. The tunable dielectric material of claim 1, wherein the tunable dielectric ceramic comprises barium strontium titanate.
- 17. The tunable dielectric material of claim 1, wherein the material further comprises a non-tunable dielectric ceramic comprising a metal oxide.
- 18. The tunable dielectric material of claim 1, wherein the material further comprises a non-tunable dielectric ceramic comprising a metal silicate.
- 19. The tunable dielectric material of claim 1, wherein the material further comprises at least one non-tunable dielectric ceramic comprising MgO, MgAl2O4, MgTiO3, Mg2SiO4, CaSiO3, MgSrZrTiO6, CaTiO3, Al2O3, SiO2, BaSiO3, SrSiO3, MgAl2O4, WO3, SnTiO4, ZrTiO4, CaSnO3, CaWO4, CaZrO3, MgTa2O6, MgZrO3, MnO2, PbO, Bi2O3, and/or La2O3.
- 20. The tunable dielectric material of claim 1, wherein the material further comprises at least one non-tunable dielectric ceramic comprising Mg2SiO4, CaSiO3, BaSiO3, SrSiO3, MgO, CaTiO3, MgZrSrTiO6, MgTiO3, MgAl2O4, MgTa2O6 and/or MgZrO3.
- 21. The tunable dielectric material of claim 1, wherein the tunable dielectric ceramic comprises barium strontium titanate and the low loss glass additive comprises B and at least one element selected from Ca, Al and Si.
- 22. The tunable dielectric material of claim 21, wherein the material further comprises at least one non-tunable dielectric ceramic comprising a metal oxide or a metal silicate.
- 23. The tunable dielectric material of claim 22, wherein the non-tunable dielectric ceramic comprises Mg2SiO4, CaSiO3, BaSiO3, SrSiO3, MgO, CaTiO3, MgZrSrTiO6, MgTiO3, MgAl2O4, MgTa2O6 and/or MgZrO3.
- 24. The tunable dielectric material of claim 1, wherein the material has a microwave loss of less than about 0.08 at a frequency of 2 GHz.
- 25. The tunable dielectric material of claim 1, wherein the material has a tunability of at least 5 percent at 4V/micron.
- 26. The tunable dielectric material of claim 1, wherein the material has a breakdown strength of at least about 80V/micron thickness.
- 27. The tunable dielectric material of claim 1, wherein the material has a sintering temperature of less than 1,200° C.
- 28. The tunable dielectric material of claim 1, wherein the material has a sintering temperature of less than 1,100° C.
- 29. The tunable dielectric material of claim 1, wherein the material has a sintering temperature of less than 1,000° C.
- 30. A tunable device comprising:
a substrate; and a tunable dielectric material deposited on the substrate, wherein the tunable dielectric material comprises a low loss glass additive.
- 31. The tunable device of claim 30, wherein the substrate comprises alumina, fosterite, zirconia or insulated metal.
- 32. A method of making a tunable dielectric material comprising:
depositing a tunable dielectric material comprising a low loss glass additive on a substrate.
- 33. The method of claim 32, further comprising sintering the deposited tunable dielectric material.
- 34. The method of claim 33, wherein the sintering step is performed at a temperature of less than 1,200° C.
- 35. The method of claim 33, wherein the sintering step is performed at a temperature of less than 1,100° C.
- 36. The method of claim 33, wherein the sintering step is performed at a temperature of less than 1,000° C.
- 37. The method of claim 32, wherein the substrate comprises alumina, fosterite, zirconia or insulated metal.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of U.S. Provisional Patent Application Serial No. 60/295,046 filed Jun. 1, 2001.
Provisional Applications (1)
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Number |
Date |
Country |
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60295046 |
Jun 2001 |
US |