US 7,031,136 B2 · Variable capacitors, composite materials

Abstract

Tunable capacitors (10, 20, 30, 40) have a dielectric material (16, 26, 36, 42) between electrodes, which dielectric material comprises an insulating material (17, 27, 37, 42) and electrically conductive material, (18, 28, 38, 48) e.g., conductive nanoparticulates, dispersed therein. In certain cases, enhanced tune-ability is achieved when the dielectric material comprises elongated nanoparticulates (38). Further enhanced tune-ability may be achieved by aligning elongated particulates in an electrode-to-electrode direction. Nanoparticulates may be produced by heating passivated nanoparticulates. Passivated nanoparticulates may be covalently bound within a polymeric matrix. High bias potential device structures can be formed with preferential mobilities.

Claims19

Dependent claims

A capacitor comprising:

a dielectric material;
a first electrode on or in said dielectric material;
a second electrode on or in said dielectric material and spaced from said first electrode;
and
at least one strip of thinner conductive material on or in said dielectric material and between said electrodes, said at least one strip being made of a material that interacts with an RF field from either of said electrodes, to cause an increase in the capacitance of the capacitor.

2 more elements

Dependencies are inferred from the claim text.

Variable capacitors, composite materials

Life of this patent

Variable capacitors, composite materials

Life of this patent

Abstract

Claims19