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US 6,737,179 B2Granted
Electronically tunable dielectric composite thick films and methods of making same
AssigneeParatek Microwave, Inc.
InventorLouise C. Sengupta
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AssigneeParatek Microwave, Inc.
InventorLouise C. Sengupta
Estimating the term…
Electronically tunable thick film composites of tunable phases such as barium strontium titanate and additional dielectric oxide phases are disclosed. The composite thick films can contain multiple phases such as barium strontium titanate and MgTiO3, Mg2SiO4, CaSiO3, MgO, MgZrO3, CaTiO3, MgAl2O4, and MgSrZrTiO6. The thick films may contain further additives such as zirconnates, stannates, rare earths, niobates and tantalates, for example, CaZrO3, BaZrO3, SrZrO3, BaSnO3, CaSnO3, MgSnO3, Bi2O3/2SnO2, Nd2O3, Pr7O11, Yb2O3, Ho2O3, La2O3, MgNb2O6, SrNb2O6, BaNb2O6, MgTa2O6, BaTa2O6, and Ta2O3 to improve the electronic and microwave properties of the thick film composites. The particle size of these films may be controlled in order to optimize the electronic and microwave properties. The electronically tunable thick film composites may be made by techniques such as screen-printing or spray deposition.
An electronically tunable thick film dielectric composite material having a thickness of from about 2 to about 25 microns, fabricated using screen printing and comprising at least one electronically tunable dielectric phase and at least one substantially non-tunable dielectric phase, wherein the material has a tunability of at least 1 percent under an applied electric field of 2 V/micron.
An electronically tunable device comprising:
A multilayer electronically tunable device comprising:
Dependencies are inferred from the claim text.