发明名称 |
MOLDED GLASS SUBSTRATE FOR MAGNETIC DISK AND METHOD FOR MANUFACTURING THE SAME |
摘要 |
A method for manufacturing a glass substrate for a magnetic disk involving press-molding a heated glass material in an inside space of a molding die comprising a pair of dies, each having a predetermined processing plane, and a barrel die for slidably guiding the dies while forming an outer circumference of the glass material joined to both principal surfaces corresponding to the dies as a molding-free face, cooling the press-molded glass substrate and forming a predetermined through-hole in a central portion of the glass substrate.
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申请公布号 |
US2007295030(A1) |
申请公布日期 |
2007.12.27 |
申请号 |
US20070843362 |
申请日期 |
2007.08.22 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
NAKAMURA SHOJI;KONDOU TAKAHISA;KATAOKA HIDENAO;SHIMIZU YOSHIYUKI |
分类号 |
C03B11/05;B28D1/04;B32B3/02;C03B11/08;G11B5/73;G11B5/84 |
主分类号 |
C03B11/05 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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