Enhanced tunability for low-dielectric-constant...

Details Enhanced tunability for low-dielectric-constant... Enhanced tunability for low-dielectric-constant...

H - Electricity

01

P

H01P 11/00 (2006.01) H01P 1/18 (2006.01) H01Q 3/44 (2006.01)

Patent

CA 2120282

ENHANCED TUNABILITY FOR LOW-DIELECTRIC-CONSTANT FERROELECTRIC MATERIALS ABSTRACT OF THE DISCLOSURE Spatial thinning in no more than two dimensions is used in order to lower both the effective dielectric cons- tant and the dielectric lose tangent of ferroelectric ce- ramics, while retaining a substantial fraction of their tunability. By not thinning in the third direction, along which the dc bias field is applied, the ferroelectric ma- terial maintains the connectivity between elements of the ferroelectric structure that is essential to retaining the tunability. Examples of one-dimensional structures (30) include small diameter columns (28, 32) of dielectric ma- terial embedded in a dielectric matrix (26, 34). Examples of two-dimensional structures (21) include square (22) and hexagonal (24) cells comprised of ferroelectric material filled with inert dielectric material or vice versa.

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