Magnetic Discs for Video Recording
Plated magnetic discs are now available to store video information which can be reproduced millions of times. With plated discs, the designer can manipulate the key magnetic parameters to suit his particular needs. The coercivity, remanent flux, loop squareness and frequency-response characteristics can be readily changed. In addition, the use of a variety of plated overcoats can produce discs with a high hardness and a low coefficient of friction. The development of these techniques now permits the production of discs which operate at substantially lower writing speeds to achieve a given signal performance. Methods of measuring the essential characteristics of plated magnetic discs have also been developed.* While precision-plated discs cannot compete with oxide-coated discs in price, their cost can be justified in applications where higher performance is required.
- Print ISSN
- 0361-4573
- Published
- 1971-04
- Content type
- Original Research
- DOI
- 10.5594/J08906