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Choosing the Right Polymer Aids Direct-Write Multiphoton Photolithography

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Molecular weight, photon absorption and glass transition temperature each play a role in etchability.

Hank Hogan

Fabricating nanoscale polymer thin-film structures mightbecome easier, thanks to researchers from Kansas State University in Manhattan. Such structures could be used in chemical and biological sensor arrays, as optical elements, for electronic components and in portable nanofluidic devices. A schematic illustrates the ablative multiphoton etching process. A thin polymer film on a glass substrate is illuminated with near-IR light from a laser (red line). Multiphoton absorption removes the polymer at the focus spot. Arbitrary patterns can be written in the sample by scanning it while...Read full article

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    Published: January 2008
    Glossary
    spectrometer
    A kind of spectrograph in which some form of detector, other than a photographic film, is used to measure the distribution of radiation in a particular wavelength region.
    Basic SciencechemicalsindustrialMicroscopyphotonsResearch & TechnologySensors & DetectorsSpectrometerspectroscopyTech PulseTi:sapphire laser

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