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AssigneeInternational Business Machines Corporation
InventorJames Hammond Brannon
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A carbon dioxide laser is used as a non-mechanical means for smoothing and polishing the as-cut chamfer surface at the edge of the disk. Applying laser radiation to the glass surface causes transient melting and resolidification. Due to surface tension effects, the glass resolidifies to produce a surface that is significantly smoother than it was before irradiation. If scratches or abrasive marks are present on the glass surface prior to irradiation, the irradiation process “polishes out” these defects as long as they are not too deep. At a wavelength near 10 μm, the penetration depth of the radiation into the glass is approximately 1 μm. Therefore, scratches and defects of this order of magnitude are eliminated. The quality of the resulting modified chamfer surface is far superior to the original mechanically ground and polished surface.
A method of treating a data storage disk, comprising the steps of:
A method of treating a data storage disk, comprising the steps of:
A method of treating a data storage disk, comprising the steps of:
Dependencies are inferred from the claim text.