The InnovationQ application will be updated on Sunday, May 31st from 10am-noon ET. You may experience brief service interruptions during that time.
Browse Prior Art Database

Uniform Deposition Of Alumina On Thin Ferrite Substrate

IP.com Disclosure Number: IPCOM000052066D
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11

Publishing Venue


Related People

Burkhart, RW Cox, AR Hartley, JD [+details]


The vapor deposition of alumina on a thin ferrite substrate is accomplished by positioning the ferrite substrate vertically in the vacuum chamber and orthogonally with reference to the electrode from which the alumina particles are released in the high temperature environment of the vacuum chamber. As a result, the alumina is deposited on both sides of the substrate simultaneously to substantially the same thickness. The deposition on both sides of the ferrite core protects the core against width erosion, and minimizes bending stress. In addition, signal output of the ferrite core when used in a magnetic head is increased.