Patent ID: 6265140
Filing Date: 2001-07-24
Classification: B82Y,G03C,G11B,Y10S

Abstract:
A method of digitally storing information, the method comprising:providing a layer comprising silver halide particles having a particle size less than about 0.2 microns;exposing said layer to light using two laser beams at at least one predetermined point of the layer;developing and fixation of said layer to form silver particles from the exposed silver halide;oxidizing the silver particles to form insoluble salt particles by an oxidizer selected from the group consisting of K.sub.3 [Fe(CN).sub.6 ], (NH.sub.4).sub.2 S.sub.2 O.sub.8, KMnO.sub.4, CuCl.sub.2, FeCl.sub.3 and quinones, said oxidation being carried out in a presence of anions selected from the group consisting of SCN.sup.-, CN.sup.-, Cr.sub.2 O.sub.7.sup.2-, WO.sub.4.sup.2-, [Fe(CN).sub.6 ].sup.3-, oxalate, citrate and anions of 1-phenyl-5mercaptotetrazole, 2-mercapto-benzothiazole, 2-mercaptobenzoxazole, 2-mercaptobenzimidazole and organic mercapto compounds; andtreating the layer with luminescing dye and allowing the luminescing dye to be sorbed onto the particles.