Accession Number : AD0628450

Title :   ACTIVE ACOUSTIC DEVICES.

Descriptive Note : Interim rept., 1 Apr-30 Jun 65,

Corporate Author : MOTOROLA INC PHOENIX ARIZ SEMICONDUCTOR PRODUCTS DIV

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

Report Date : FEB 1966

Pagination or Media Count : 67

Abstract : Thin film transducer techniques have yielded conversion losses of 6 to 8 db with bandwidths of the order of 50% in the frequency range of 100 to 300 megacycles. Surface roughness and pinholes have caused major interface problems between the transducer and the drift field contacts. The dependence of RF performance upon crystal length and lateral dimensions and the dependence of crystal temperature upon cross section were investigated. The electrical and acoustic parameters which characterize a strong electroacoustic gain interaction are summarized. A correlation between the gain properties of a sample and its etch pit density was determined. (Author)

Descriptors :   (*TRANSDUCERS, SEMICONDUCTOR DEVICES), (*ACOUSTIC EQUIPMENT, SEMICONDUCTOR DEVICES), (*SEMICONDUCTOR DEVICES, TRANSDUCERS), SEMICONDUCTING FILMS, PIEZOELECTRIC CRYSTALS, PHENONS

Subject Categories : Electrical and Electronic Equipment
      Acoustics
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE