In-situ direct visualization of irradiated e-beam patterns on unprocessed resists using atomic force microscopy

We introduce an in-situ characterization method of resists used for e-beam lithography. The technique is based on the application of an atomic force microscope which is directly mounted below the cathode of an electron-beam lithography system. We demonstrate that patterns irradiated by the e-beam can be efficiently visualized and analyzed in surface topography directly after the e-beam exposure. This in-situ analysis takes place without any development or baking steps, and gives access to the chemical (or latent) image of the irradiated resist.