<p>This invention is directed to the fabrication of magnetic memory storage devices which consist essentially of a head pad and a rigid information disc, that disc consisting essentially of a rigid substrate having a layer of magnetic media joined to the surface of said substrate through an underlayer. The invention is particularly drawn to the substrate for the information disc which is composed of a glass-based material containing 0.05-2% by weight total of cobalt oxide and/or iron oxide and/or nickel oxide. The most preferred glass-based material comprises a glass-ceramic wherein canasite constitutes the predominant crystal phase.</p>
申请公布号
EP0608537(A1)
申请公布日期
1994.08.03
申请号
EP19930120110
申请日期
1993.12.14
申请人
CORNING INCORPORATED
发明人
HOOVER, HERBERT LESLIE, CORNING INCORPORATED;MILLER, ROGER ALLEN, CORNING INCORPORATED;PINCKNEY, LINDA RUTH, CORNING INCORPORATED;WEDDING, BRENT MERLE, CORNING INCORPORATED