FERROMAGNETIC, FERROELECTRIC AND ACOUSTIC DEVICES.
Abstract
This work being carried out under this contract is aimed at the development of ultrasonic delay lines which utilize piezoelectric semiconductors. To this end the understanding of CdS film-fused silica delay lines was significantly increased during the first quarter. Calculation showed that cross coupling effects between longitudinal and shear modes will be relatively small. It was found that for certain angles of the c-axis with respect to the electrodes the generation of shear waves is maximized relative to the generation of longitudinal waves. An equivalent circuit was derived from the basic piezoelectric equations. With this it was shown that the midband loss can in theory be zero. Also it was found that the input impedance can be made to match commonly available coaxial lines. Preliminary experimental work produced CdS films of high resistivity and good adherence. It was found that the degree of orientation of the CdS films was dependent on the kind of metal used for the base electrode. Good progress was made on a substrate holder and three position mask changer which will incorporate a quartz crystal microbalance. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1965
- Accession Number
- AD0475206
Entities
People
- T. R. Sliker