Erasability in an overcoated organic dyehyphen;binder medium has been demonstrated. With thin (sim;50 nm) overcoats on such media, a laser pulse forms a pit in the dyehyphen;binder layer, while the overcoat forms a dome over the pit. Information is erased by heating the rim material with low laser power which fills the recorded pit. During recording into a thickly (sim;300 nm) overcoated recording medium, material flow occurs from the trailing edge towards the leading edge of the mark. Results of modeling, observations of pit morphology, evidence of longhyphen;term stability, and measurements of optical disk performance are presented for thinly and thickly overcoated erasable organic dyehyphen;binder layers.
展开▼