Accession Number : AD0617749

Title :   ACTIVE ACOUSTIC DEVICES.

Descriptive Note : Interim quarterly rept. no. 2, 1 Oct-31 Dec 64,

Corporate Author : MOTOROLA INC PHOENIX ARIZ SEMICONDUCTOR PRODUCTS DIV

Personal Author(s) : Sakiotis,N. G. ; Brendecke,W. H. ; Hickernell,F. S.

Report Date : MAY 1965

Pagination or Media Count : 63

Abstract : Investigations of suitable heat sink material needed for CW operation resulted in the development of a BeOloaded epoxy with a thermal conductivity of 1.6 BTU/HrFt-degrees F. This appears compatible with the requirements as previously determined. The open-tube or dynamic technique was determined to be the most feasible for the epitaxial growth of CdS transducers. Theoretical and experimental investigations of the vacuum deposition of CdS resulted in films with resistivity values ranging from 300 ohm-cm to 7 X 10 to the 6th power ohm-cm. Good quality CdS crystals with high mobility and intermediate resistivity levels were obtained by annealing in a sulphur atmosphere. Investigation of the properties of zinc oxide crystals were initiated. (Author)

Descriptors :   (*TRANSDUCERS, SEMICONDUCTOR DEVICES), (*ACOUSTIC EQUIPMENT, SEMICONDUCTOR DEVICES), (*SEMICONDUCTOR DEVICES, TRANSDUCERS), PHONONS, SOLID STATE PHYSICS, ULTRASONIC PROPERTIES, PIEZOELECTRIC CRYSTALS, EPITAXIAL GROWTH, CADMIUM COMPOUNDS, SULFIDES, FILMS, VAPOR PLATING, VACUUM APPARATUS, ZINC COMPOUNDS, OXIDES

Distribution Statement : APPROVED FOR PUBLIC RELEASE