15-02-2010, 12:44 PM
[attachment=2061]
INTRODUCTION
Invented by Alois Senefelder in Germany in 1798
Fundamentally new printing technology
Mechanical Plano graphic process in which the printing and non-printing areas of the plate are all at the same level
Dip-Pen Nanolithography
DPN is a unique modification of atomic force microscope (AFM) instrumentation.
High-resolution patterning capabilities for a number of molecular and biomolecular Ëœinksâ„¢ on a variety of substrate types such as metals, semiconductors, and monolayer functionalized surfaces.
Characteristics of AFM
Works by measuring local properties - such as height, optical absorption, or magnetism - with a probe or "tip" placed very close to the sample.
The small probe-sample separation makes it possible to take measurements over a small area
Conclusion
Dozens of research groups worldwide are working on DPN applications to develop even better techniques
The tDPN technique, an improvement to DPN could be used to produce features too small to be formed with light-based lithography, and as a nanoscale soldering iron for repairing circuitry on semiconductor chips
