公开(公告)号：DE3675845D1

公开(公告)日：1991-01-10

申请号：DE3675845

申请日：1986-07-25

Applicant: IBM

Inventor： BARTON ROGER WESTWOOD ,  CHEN MARTIN YU-WEN ,  DAVIS CHARLES RAYMOND ,  LIM GRACE SU ,  MARRELLO VINCENT NMN ,  RUBIN KURT ALLAN

IPC: G11B7/00 ,  G11B7/0045 ,  G11B7/243 ,  G11B7/253 ,  G11B7/254 ,  G11B7/257 ,  G11B7/30 ,  G11B7/24

公开(公告)号：DE3573858D1

公开(公告)日：1989-11-23

申请号：DE3573858

申请日：1985-05-10

Applicant: IBM

Inventor： BARTON ROGER WESTWOOD ,  COUFAL HANS JUERGEN ,  JIPSON VICTOR BURR ,  LEE WEN YAUNG

IPC: B41M5/26 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/243 ,  G11B7/257 ,  G11B9/00 ,  G11B11/00 ,  G11C13/04 ,  G11B7/24

Abstract: A method of and structure for optical recording by energy-induced homogenization or fractionation is disclosed. When the,method involves fractionation, a film is provided that contains a homogeneous mixture of a matrix material and an incident energy absorbing material. A spot on the film is treated with sufficient energy in the form of electric fields, radiation or heat, or combinations thereof to effect fractionation and/or homogenization of the film which will undergo further physical state transition only under treatment with additional energy. In a preferred embodiment, the fractionation is effected by laser radiation. The laser irradiated spot becomes inhomogeneous and can be detected by the resulting changes in its optical properties. When the method involves homogenization, a film is provided that contains a inhomogenous mixture. The energy treated spot in this case becomes homogeneous without undergoing a phase transition between the amorphous and crystalline phases. Numerous combinations of fractionation and homogenization can result in the writing and erasing of information in a storage device.