GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM, GLASS SPACER FOR MAGNETIC RECORDING/REPRODUCING DEVICE, AND MAGNETIC RECORDING/REPRODUCING DEVICE
本页收录老挝专利「GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM, GLASS SPACER FOR MAGNETIC RECORDING/REPRODUCING DEVICE, AND MAGNETIC RECORDING/REPRODUCING DEVICE」的公开登记要点，由 HOYA CORPORATION 于 2019-05-14 提交申请，当前状态为等待形式审查。公开档案中可核验：申请号 P/742，DIP 编号 LAP742，主管局代码 LA，保护类型 Patent - PCT National Phase。时间线要点：公开/公告日 2026-02-27。国际分类 / IPC 标注为 C03C 3/078、C03C 3/083、C03C 3/085、C03C 3/087、C03C 3/089、C03C 3/091、C03C 3/093、G11B 5/73。发明人 / 设计人包括 HASHIMOTO, Kazuaki、SATO Koichi。代理机构 / 代理人记载为 Tilleke & Gibbins Lao Co., Ltd。公开摘要提示：Provided is a glass for a magnetic recording medium substrate, the glass being an amorphous oxide glass having an SiO 2 content of 56-80 mo…。
P/742
图样
基础信息
- 类型
- 专利
- 申请号
P/742- 状态
- 等待形式审查
- 申请人
- HOYA CORPORATION
- 代理机构
- Tilleke & Gibbins Lao Co., Ltd
- 申请日期
- 2019-05-14
- 公开 / 公告日
- 2026-02-27
- 保护类型
- Patent - PCT National Phase
- 优先权
- JP · 2018-094428 · 2018-05-16
- 国际分类
- C03C 3/078 · C03C 3/083 · C03C 3/085 · C03C 3/087 · C03C 3/089 · C03C 3/091 · C03C 3/093 · G11B 5/73
- 商品 / 服务
- —
办理流程
根据当前状态动态标注-
提交申请
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形式审查 进行中
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实质审查
-
公开
-
授权
关联分析
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摘要
Provided is a glass for a magnetic recording medium substrate, the glass being an amorphous oxide glass having an SiO 2 content of 56-80 mol%, an Li 2 O content of 1-10 mol%, a B 2 O 3 content of 0-4 mol%, a total content (MgO + CaO) of MgO and CaO of 9-40 mol%, a specific gravity of 2.75 g/cm 3 or lower, a glass transition temperature of 650°C or higher, and a Young's modulus of 90 GPa or higher.
Provided is a glass for a magnetic recording medium substrate, the glass being an amorphous oxide glass having an SiO 2 content of 56-80 mol%, an Li 2 O content of 1-10 mol%, a B 2 O 3 content of 0-4 mol%, a total content (MgO + CaO) of MgO and CaO of 9-40 mol%, a specific gravity of 2.75 g/cm 3 or lower, a glass transition temperature of 650°C or higher, and a Young's modulus of 90 GPa or higher.
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