LIQUID-HELIUM AND ITS POSSIBLE USE FOR HOLOGRAPHY OF MICRO-OBJECTS (ACOUSTIC AND ELECTRONIC) AND FOR MICROLITHOGRAPHY

We consider the possibility to use liquid helium for some applied prob lems such as holography of micro-objects (including biological objects like macromolecules and viruses) with spatial resolution of the order of nanometers, microlithography, and for the creation of electron sou rces. In the first part we discuss the possibility of acoustic hologra phy of micro-objects submerged in liquid helium. In the second part we discuss the possibility of electron holography when liquid helium is used as an emitter of electrons. In the third part we discuss some pro perties of such emitters which probably may be applied to microlithogr aphy where electrons are used. (C) 1997 Published by Elsevier Science B.V.