Anisotropic crystal circuit

Abstract

Abstract A capacitive arrangement which, in some instances, can be used in combination with one or more resistive elements or other circuit elements to form a distributed circuit, wherein a slab of anisotropic single crystal, such as barium titanate, is used as a substrate upon whose major surfaces the circuit electrodes or elements are mounted. When electrodes are disposed on opposite surfaces of the slab between which an electric field exists and if the crystal slab is mounted so that the C axis is perpendicular to this electric field, the dielectric constant of the crystal slab is a maximum and the capacitance of the capacitor formed by said electrodes and the portion of the crystal slab (dielectric substrate) disposed therebetween is a maximum. On the other hand, the dielectric constant of the portion of the crystal slab disposed between the electrodes, or circuit elements, mounted on the same surface of the slab and arranged parallel to the C axis of the slab will be a minimum and, consequently, the capacitance associated with an electric field existing between these electrodes or elements is a minimum. Alternately, the crystal slab may be replaced by a dielectric member having deposited thereupon a polycrystalline layer comprising several single crystals all oriented with their C axes in the same direction and in the direction of the C axis described above for the single crystal slab.

Inventors

• 👤 Emanuel Gikow

Bibliographic Details