Patent ID: 8004147
Filing Date: 2011-08-23
Classification: H03H

Abstract:
1. Waveguide components on the basis of acoustic surface waves, containing at least one interdigital converter for exciting acoustic surface waves in a piezoelectric substrate or a piezoelectric layer, wherein the interdigital converter or converters a) are disposed at a defined distance above the piezoelectric substrate or the piezoelectric layer for exciting wave fields, or b) are in contact with the piezoelectric substrate formed as a disk or the piezoelectric layer, whereby in the case of Variant a), the piezoelectric substrate is configured as a ring, and the piezoelectric layer is configured as a ring-shaped region, and in the case of Variant b), the interdigital converters and/or the piezoelectric layer form ring-shaped regions, and wherein the metal layer thickness of fingers of the interdigital converters is greater or less than the layer thickness of the metal layer that connects the fingers.