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 50.5 to 52.5 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 4 to 10.6 wt % of TiO2.
Minolta Co., Ltd.
C C
C03C C03C
inventional inventional
Akira Kazuhiko Hideki Hiroshi Hideki Toshiharu
Sugimoto Ishimaru Kawai Yuki Nagata Mori