Reversible Beam Addressable Storage Medium
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09
This article describes a beam addressable storage medium which can be cycled repeatedly without degradation of its properties. The storage medium consists of two materials: a relatively inert matrix material and an active material which can undergo a physical transformation that changes its optical properties. The active material can be an amorphous chalcogenide, for example, that undergoes a crystalline to amorphous transformation on heating . The matrix material is relatively stable and does not change in the thermal cycle used to switch the active material. The matrix serves to subdivide the active material into small, isolated regions in order to eliminate irreversible effects when the active material is cycled.