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
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」由 HOYA CORPORATION 持有，当前状态为已申请，申请号 P/742。LaoBiz 老商通提供老挝知识产权信息检索与企业关联查询。
Patent “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” is held by HOYA CORPORATION; status: 已申请. Search Laos IP records on LaoBiz.
P/742
图样
基础信息
- 类型
- 专利
- 申请号
P/742- 状态
- 已申请
- 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
- 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
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实质审查
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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 SiO2 content of 56-80 mol%, an Li2O content of 1-10 mol%, a B2O3 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/cm3 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 SiO2 content of 56-80 mol%, an Li2O content of 1-10 mol%, a B2O3 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/cm3 or lower, a glass transition temperature of 650°C or higher, and a Young's modulus of 90 GPa or higher.