Browse Prior Art Database

Low Radiation Head Design for Magneto-Optic Direct Overwrite

IP.com Disclosure Number: IPCOM000120185D
Original Publication Date: 1991-Mar-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 30K

Publishing Venue

IBM

Related People

Makansi, T: AUTHOR

Abstract

A magnetic head design is disclosed that achieves direct overwrite in magneto-optical recording systems while maintaining a low level of unwanted radiation. Traditional magnetic heads operated at high frequencies will radiate like a loop antenna, possibly causing interference with nearby circuits or causing non-compliance with radiation standards. The relatively large size of heads used in direct-overwrite magneto- optical systems aggravates the radiation problem.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Low Radiation Head Design for Magneto-Optic Direct Overwrite

      A magnetic head design is disclosed that achieves direct
overwrite in magneto-optical recording systems while maintaining a
low level of unwanted radiation.  Traditional magnetic heads operated
at high frequencies will radiate like a loop antenna, possibly
causing interference with nearby circuits or causing non-compliance
with radiation standards.  The relatively large size of heads used in
direct-overwrite magneto- optical systems aggravates the radiation
problem.

      The head design in the figure consists of two coils wrapped on
either side of a symmetric piece of ferrite.  The two coils are wound
such that the magnetic fields generated by each cancel.  The
electromagnetic radiation emitted by the entire head cancels
similarly, resulting in a superior design in systems where radiation
is a concern.

      Disclosed anonymously.