MINIATURE THIN-FILM INDUCTORS
Abstract
The problem of reducing air gap effects in the assembly of copper-conducting spirals with bulk ferrites is reviewed. Methods are discussed for overcoming this effect by providing recessed areas for accommodating the coils in the ferrite. Also reviewed are the problems encountered in the control of the ferrite-film deposition process to achieve more reproducible films. Methods for the measurement of the magnetic, compositional, and structural properties of the deposited films are discussed. The application of flat spiral coils of gold to the ferrite film, followed by a second deposition of ferrite films, is also discussed. The density of the ferrite films is shown to be comparable to that of a bulk ferrite sample of like composition. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1962
- Accession Number
- AD0285039
Entities
People
- F.r. Gleason
Organizations
- Motorola Mobility