摘要:
A liquid precursor containing a metal is applied to a substrate, RTP baked, and annealed to form a layered superlattice material. Special polyoxyalkylated precursor solutions are designed to optimize polarizability of the corresponding metal oxide materials by adding dopants including stoichiometric excess amounts of bismuth and tantalum. The RTP baking process is especially beneficial in optimizing the polarizability of the resultant metal oxide.
摘要:
A metal organic liquid precursor solution includes metal organic complexes dispersed in an ester solvent. The ester solvent has medium length carbon chains to prevent the precipitation of strongly electropositive metals in solution. A liquid precursor solution is used to make thin film metal oxides of uniform thickness and consistent quality.
摘要:
A thin-film zinc oxide varistor (10) for use in integrated circuits and the like is produced by applying a polyoxyalkylated metal complex, such as a metal alkoxycarboxylate, to a substrate (12, 14, and 16) for the formation of a dried nonohmic layer (18). The method of production includes the steps of providing a substrate and a precursor solution including a polyoxyalkylated zinc complex (P22, P24), coating a portion of the substrate with the precursor solution (P26), drying the coated substrate (P32), and crystallizing the dried thin-film zinc oxide layer (P30). The resultant crystalline zinc oxide varistor layer (18) may be doped with bismuth, yttrium, praseodymium, cobalt, antimony, manganese, silicon, chromium, titanium, potassium, dysprosium, cesium, cerium, and iron to provide a non-ohmic varistor. The varistor layer (10) is annealed at a temperature ranging from about 400 to about 1000.degree. C. to provide a layer having a thickness ranging from about 50 nanometers to about 500 nanometers and an average grain size diameter less than about 200 nanometers.
摘要:
A substrate is prebaked in an oxygen furnace. A thin film of layered superlattice oxide is formed on the substrate by a chemical vapor deposition process. The film is RTP baked to provide grains with a mixed phase of A-axis and C-axis orientation. The film may be treated by ion implantation prior to the RTP bake and oxygen furnace annealed after the RTP bake. An electrode is deposited on the layered superlattice thin film and then the film and electrode are oxygen furnace annealed.
摘要:
A precursor is made by mixing a metal alkoxycarboxylate-containing liquid with a 2-ethylhexanoic acid in an effective amount for shelf-stabilizing said liquid by substituting 2-ethylhexanoate ligands for alkoxide ligands, thereby forming a mixture, and heating said mixture to substitute said carboxylate ligands for said alkoxide ligands. Specficially, a barium strontium titanate precursor and a strontium bismuth tantalate precursor are made by combining polyoxyalkylated metal moieties to form a liquid solution in which the metal atoms bond with an oxygen atom in a ligand selected from a ligand group consisting of alkoxides and carboxylates, then then heating the liquid solution.
摘要:
A technique for disrupting the operation of a target containing nonlinear electronic devices generally includes generating a high frequency signal; generating a low frequency signal; modulating the high frequency signal with the low frequency signal; and emitting the modulated high frequency signal at the target.
摘要:
The microprocessor-controlled RF modulator apparatus will provide repeatable, controlled scintillation on a test bench generated low-power RF target waveforms for the purpose of providing a target returns with realistic radar cross section characteristics during testing of the F-16 (or any other) fire control radar. The microprocessor-controlled RF modulator apparatus is utilized in line between an RF target signal generator and the target horn to provide a variety of target situations for testing radar hardware and software.
摘要:
A radio frequency source includes a coaxial non-linear transmission line. The coaxial non-linear transmission line may include a closed, non-magnetic, cylindrical outer conductor defining a cavity therein; and a plurality of stages enclosed by the outer conductor. Each stage may then includes an axial field solenoid wound about the outer conductor; a non-magnetic, cylindrical inner conductor disposed within the cavity and coaxially aligned with the outer conductor; a plurality of cylindrical ferrite switch elements, each defining a respective bore through which the inner conductor runs; and a plurality of inner and outer cups coaxially aligned with the inner and outer conductors, each defining a respective bore through which the inner conductor runs.
摘要:
A radio frequency source includes a coaxial non-linear transmission line. The coaxial non-linear transmission line may include a closed, non-magnetic, cylindrical outer conductor defining a cavity therein; and a plurality of stages enclosed by the outer conductor. Each stage may then includes an axial field solenoid wound about the outer conductor; a non-magnetic, cylindrical inner conductor disposed within the cavity and coaxially aligned with the outer conductor; a plurality of cylindrical ferrite switch elements, each defining a respective bore through which the inner conductor runs; and a plurality of inner and outer cups coaxially aligned with the inner and outer conductors, each defining a respective bore through which the inner conductor runs.
摘要:
The present invention is, in one aspect, a radio frequency source, comprising a gyromagnetic precession oscillator. In a second aspect, the gyromagnetic precession oscillator comprises a closed, non-magnetic, cylindrical outer conductor defining a cavity therein; an axial field solenoid wound about the outer conductor; a non-magnetic, cylindrical inner conductor disposed within the cavity and coaxially aligned with the outer conductor; a plurality of cylindrical ferrite precessors, each defining a respective bore through which the inner conductor runs; a plurality of dividers disposed within and defining a resonant chamber in the cavity; and a dielectric material filling the cavity. In a third aspect, the radio frequency source is actively tunable. In a fourth aspect, the radio frequency source that is tunable pulse-to-pulse.