Blonder, GregHebard, Arthur2019-07-102019-07-101986-04-011984-04-06Greg Blonder, Arthur Hebard. "Optical information storage." U.S. Patent 4,579,807-A.US-4579807-Ahttps://hdl.handle.net/2144/36498An optical disc including a medium having both a continuous phase and a non-continuous phase yields excellent contrast and stability for optical recording purposes. Exemplary of materials that form the desired multi-phase system are those produced by sputtering metals such as indium in an oxygen environment.CermetPatent429664