Accession Number : ADA332492

Title :   Magnetic Nanostructures Produced By Electron Beam Patterning Of Direct Write Transition Metal Fluoride Resists

Corporate Author : ARIZONA STATE UNIV TEMPE DEPT OF PHYSICS

Personal Author(s) : Streblechenko, Dmitry ; Scheinfein, M. R.

PDF Url : ADA332492

Report Date : 1997

Pagination or Media Count : 20

Abstract : Transition metal (TM) fluoride electron beam sensitive resists suitable for the in-situ fabrication of arbitrarily shaped nanometer scale magnetic structures have been developed. 20 nm thick TM fluoride films are prepared by thermal evaporation onto thin carbon films. Nano-patterns are written directly into the TM fluoride film in a scanning transmission electron microscope using a 0.5 nm diameter electron probe. Electron energy loss spectroscopy measurements indicate that as fluorine is released, the TM coalesces. Electron micrographs of exposed patterns show that the resist resolution is on the order of nanometers. Exposure of broad areas leads to coalescent TM layers which cap the remaining fluoride and decrease the rate of fluorine removal. The cross section for the removal of a fluorine atom and the cross section for the same process in the presence of an arbitrarily thick capping layer were measured. An electron dose of 1000 c/cm2 at 100 keV will remove 90% of the fluorine from a 20 nm thick CoF2 film.

Descriptors :   *TRANSITION METALS, *ELECTRON BEAMS, *NANOTECHNOLOGY, MAGNETIC FIELDS, SCANNING ELECTRON MICROSCOPES, THIN FILMS, ELECTRON MICROSCOPY, FLUORINE, FLUORIDES, ELECTRON PROBES, SILICON ON INSULATOR, ELECTRON BEAM LITHOGRAPHY.

Subject Categories : Fabrication Metallurgy
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE