MAGNETIC DISK GLASS SUBSTRATE
A magnetic disk glass substrate including compressive stress layers at main surfaces and a tensile stress layer between the compressive stress layers formed by chemical strengthening. When the glass substrate has a thickness of less than 0.5 mm and the tensile stress layer has a thickness L and a te...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A magnetic disk glass substrate including compressive stress layers at main surfaces and a tensile stress layer between the compressive stress layers formed by chemical strengthening. When the glass substrate has a thickness of less than 0.5 mm and the tensile stress layer has a thickness L and a tensile stress of Pt (kg/mm2), the following relation holds: 0.4 (kg/mm) L·Pt 2.0 (kg/mm) |
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