Patent ID: 9473106
Filing Date: 2016-10-18
CPC Classification: H03H

Claim Text:
1. A bulk-acoustic-wave delay line device comprising: one or more input transducer layers, including a first input transducer layer, for converting input electrical signals to mechanical waves; one or more output transducer layers, including a first output transducer layer, for converting the mechanical waves to output electrical signals; wherein each of the one or more input transducer layers and each of the one or more output transducer layers comprises a thin-film piezoelectric medium positioned between two electrode layers, each electrode layer comprising one or more electrodes; one or more delay layers, including a first delay layer adjacent to the first input transducer layer and adjacent to the first output transducer layer, each delay layer comprising a thin-film delay medium; and a substrate for carrying the one or more input transducer layers, the one or more output transducer layers, and the one or more delay layers; wherein the thin-film piezoelectric medium comprises a first chemical composition; wherein the first delay layer comprises an amorphous material of the first chemical composition; and wherein the first delay layer has approximately the same acoustic impedance as the transducer layers.