Limited life medium
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United States of America Patent
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N/A
Issued Date -
May 22, 2008
app pub date -
Nov 13, 2007
filing date -
Nov 21, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A limited-life storage medium comprises a flowable agent. The flowable agent comprises water and a hygroscopic substance. In one example, the flowable agent is a mixture of glycol and water with an acid or other corrosive active ingredient dissolved in it. In one example, the storage medium is an optical disc. When the disc is read, the rotation of the disc propels the flowable agent into contact with a metal data-carrying layer. In one example, the hygroscopic substance reduces any tendency of the flowable agent to dry out and cease to be flowable, and may tend to buffer the proportion of water in the flowable medium within a range.
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