Patent ID: 6071671
Filing Date: 2000-06-06
Classification: G11B,G11C,Y10S

Abstract:
A method for manufacturing optical 3-D memory for information storage, said method comprising the following main sequence of steps:a) coating of a substrate by a layer containing an active medium comprising a material existing either ina first form, which is fluorescent upon illumination thereof by a single beam of a first electromagnetic radiation, or existing ina second form, which is not fluorescent upon illumination thereof by said first electromagnetic radiation, wherein transfer from one form to another can be effected by illuminating said material by a single beam of a second electromagnetic radiation defined by a spectrum different from the spectrum of said first radiation;b) illuminating said layer containing an active medium by said second electromagnetic radiation so as to create within said active medium a plurality of elemental cells distributed in different locations within said medium and containing said first or second form of said material, said elemental cells being allocated for an information to be stored; andc) covering said layer containing an active medium with a protective intermediate layer;wherein said memory comprises a plurality of layers with an active medium and intermediate layers, dividing therebetween, said intermediate layers being substantially not transparent to said second electromagnetic radiation and being substantially transparent to said first electromagnetic radiation.