Method of preparing a fluorescent screen

Claim 1

THE METHOD OF PREPARING A TRI-COLOR FLUORESCENT SCREEN INCLUDING THE STEPS OF COATING A SCREEN SURFACE WITH A FIRST LIGHT HARDENABLE FILM OF PHOTO-SENSITIVE MATERIAL, EXPOSING DESIGNATED AREAS OF SAID FIRST FILM TO LIGHT THROUGH A MASK, WASHING SAID FILM WITH A SOLVENT TO REMOVE UNEXPOSED AREAS OF SAID FIRST FILM AND TO LEAVE DEPRESSIONS AT LOCATIONS CORRESPONDING TO SAID UNEXPOSED AREAS, FILLING SAID DEPRESSIONS WITH A FIRST PHOSPHOR AND ADHERING SAID FIRST PHOSPHOR TO SAID SCREEN SURFACE, REMOVING THE EXPOSED AND LIGHT HARDENED AREAS OF SAID FIRST FILM, COATING SAID SCREEN SURFACE WITH A SECOND LIGHT HARDENABLE FILM OF PHOTO-SENSITIVE MATERIAL, EXPOSING PREVIOUSLY UNEXPOSED DESIGNATED AREAS OF SAID SECOND FILM TO LIGHT THROUGH A MASK, WASHING SAID SECOND FILM WITH A SOLVENT TO REMOVE UNEXPOSED AREAS AND TO LEAVE DEPRESSIONS AT LOCATIONS CORRESPONDING TO SAID UNEXPOSED AREAS, FILLING SAID DEPRESSIONS WITH A SECOND PHOSPHOR AND ADHERING SAID SECOND PHOSPHOR TO SAID SCREEN SURFACE, REMOVING THE EXPOSED AND LIGHT HARDENED AREAS OF SAID SECOND FILM, COATING SAID SCREEN SURFACE WITH A THIRD LIGHT HARDENABLE FILM OF PHOTO-SENSITIVE MATERIAL, EXPOSING PREVIOUSLY UNEXPOSED DESIGNATED AREAS OF SAID THIRD FILM TO LIGHT THROUGH A MASK, WASHING SAID THIRD FILM WITH A SOLVENT TO REMOVE UNEXPOSED AREAS AND TO LEAVE DEPRESSIONS AT LOCATIONS CORRESPONDING TO SAID UNEXPOSED AREAS, FILLING SAID DEPRESSIONS WITH A THIRD PHOSPHOR AND ADHERING SAID THIRD PHOSPHOR TO SAID SCREEN SURFACE, AND BAKING SAID SCREEN TO GASIFY REMAINING PORTIONS OF SAID LIGHT HARDENED FILMS LEAVING BEHIND SAID FIRST, SECOND, AND THIRD PHOSPHORS ON SAID SCREEN SURFACE.