Memory element, method for structuring a surface, and storage device
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United States of America Patent
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Nov 16, 2004
Grant Date -
Jul 17, 2003
app pub date -
Nov 19, 2002
filing date -
Mar 13, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention is essentially characterized in that in a first step a substrate is provided, which is coated with defined pattern of protrusions of a coating layer of a different material, so that an interface is defined between the substrate and the coating layer. As an example, the patterned coating layer can be applied by first forming an essentially homogeneous coating layer, which is then partially removed by means of photolithographic and etching techniques, leaving nanometer sized protrusions in that layer. As a next step, the surface provided with these structures is modified by selectively removing protrusions by means of a micro-device. Such a micro-device can be formed in a similar way to a scanning probe microscope (SPM) tip. The presence or absence of a protrusion represents a readable data bit information.
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