Method and medium for electron beam recording

Claim 1

IN METHOD FOR DIRECT ELECTRON BEAM RECORDING OF INFORMATION IN A SHEET-LIKE RECORDING MEDIUM ADAPTED FOR READOUT OF PRE-RECORDED INFORMATION BY OPTICAL PROJECTION, SAID MEDIUM CONTAINING A BASE SUPPORT LAYER, AN ELECTRON SENSTIVE COMPOSITION LAYER AND A CONDUCTIVE LAYER POSITIONED ON ONE FACE OF SAID MEDIUM AND COMPOSED OF AN ALKALI SOLUBLE ORGANIC POLYMERIC BINDER AND CONDUCTIVE PARTICLES DISTRIBUTED HOMOGENEOUSLY THEREIN, THE IMPROVEMENT WHICH COMPRISE THE STEPS OF: (A) EXPOSING UNDER VACUUM ONE SURFACE OF SUCH A MEDIUM TO AN ELECTRON BEAMS MODULATED WITH INFORMATION TO BE RECORDED WHILE SIMULTANEOUSLY GROUDING THE CONDUCTIVE LAYER OF SUCH MEDIUM, SAID BEAM HAVING AN ASSOCIATED ENERGY AND RELATIVE MOTION ADAPTED FOR RECORDING SUCH MODULATION IN THE ELECTRON SENSITIVE COMPOSITION LAYER OF SUCH MEDIUM, AND (B) THEREAFTER CONTACTING SAID CONDUCTIVE LAYER WITH AN AQUEOUS ALKALINE LIQUID FOR A TIME SUFFICIENT TO DISSOLVE AND THEREBY REMOVE SUCH LAYER FROM SUCH MEDIUM.