Burns, Doane, Swecker & Mathis, LLP
Glass-ceramic composition for recording disk substrate
A glass ceramics composition for recording disk substrate consists essentially, expressed in terms of weight percent on the oxide basis, of from 65 to 80 wt % of SiO2, from 3 to 15 wt % of Al2O3, from 3 to 15 wt % of Li2O, from 0.2 to 5 wt % of P2O5, and from 2.5 to 12 wt % of ZrO2.
Minolta Co., Ltd.
C C
C03C C03C
inventional inventional
Kazuhiko Hideki Hiroshi Toshiharu Hideki
Ishimaru Nagata Yuki Mori Kawai