Burns, Doane, Swecker & Mathis, LLP
Glass-ceramic composition for recording disk substrate
A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 48 to 54.8 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 2.4 to 10 wt % of Li2O.
Minolta Co., Ltd.
C C
C03C C03C
inventional inventional
Akira Hiroshi Hideki Hideki Kazuhiko Toshiharu
Sugimoto Yuki Nagata Kawai Ishimaru Mori