Accession Number : AD0602270

Title :   MINIATURE THIN FILM INDUCTORS (MODIFICATION NO. 2).

Descriptive Note : Final development rept. for 27 May 63-27 May 64,

Corporate Author : MOTOROLA INC SCOTTSDALE ARIZ

Personal Author(s) : Gleason,F. R.

Report Date : 30 JUN 1964

Pagination or Media Count : 78

Abstract : The report describes a program directed toward the development of techniques for fabricating miniature thin-film inductors. The basic device consists of a flat spiral conducting path deposited on a bulk ferrite substrate and encapsulated with a ferrite film deposit. The goal of the program was to fabricate these inductances in a range from 38 to 1000 microhenries with a Q-value of 100 measured at 1 Mc. The technique for depositing the ferrite film by the spray hydrolysis of a chloride solution is described. The spiral coils were made from gold and deposited by a combination of vacuum evaporation and electrodeposition techniques. The maximum air core coil inductance obtained in an area 0.3 inch square was 1.8 microhenries. The largest inductance value obtained for a single encapsulated coil was 54 microhenries with a Q-value of 6 at 1 Mc. (Author)

Descriptors :   (*MINIATURE ELECTRONIC EQUIPMENT, (COILS), (*COILS, METAL FILMS), FILMS, GOLD, ENCAPSULATION, FERRITES, NICKEL ALLOYS, ZINC ALLOYS, COBALT ALLOYS, INDUCTANCE, SPRAYS, CHLORIDES, VAPOR PLATING, EVAPORATION, ELECTRODEPOSITION

Distribution Statement : APPROVED FOR PUBLIC RELEASE