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US09307624B2 Lithographic apparatus 有权
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Lithographic apparatus
Abstract:
A discharge produced plasma radiation source includes a laser beam pulse generator configured to provide a laser beam pulse to trigger a pinch in a plasma of the discharge produced plasma radiation source. The laser beam pulse generator is arranged to provide a laser beam pulse having an energy greater than an optimum laser beam pulse energy that corresponds to a maximum output of a given wavelength of radiation for a given discharge energy.
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