Data storage device having a phase change memory medium reversible by direct overwrite

Patent 4876667 Issued on October 24, 1989. Estimated Expiration Date:

June 22, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Information recording medium including antimony-selenium compounds
Patent #: 4633273
Issued on: 12/30/1986
Inventor: Watanabe , et al.

Data storage device having novel barrier players encapsulating the data storage medium
Patent #: 4660175
Issued on: 04/21/1987
Inventor: Strand

Grooved optical data storage device including a chalcogenide memory layer
Patent #: 4719594
Issued on: 01/12/1988
Inventor: Young , et al.

Erasure means and data storage system incorporating improved erasure means Patent #: 4744055
Issued on: 05/10/1988
Inventor: Hennessey

Inventors

Assignee

Energy Conversion Devices, Inc.

Application

No. 064645 filed on 06/22/1987

US Classes:

365/113, Amorphous346/135.1, Laminated, impregnated, or coated bases365/163, Amorphous (electrical)365/215, Optical369/286, Laminated or unified discrete layers430/270.11, Optical recording nonstructural layered product having a radiation sensitive composition layer claimed or solely disclosed as optically reorderable and optically machine readable430/270.13, Which changes phase during recording430/945LASER BEAM

Examiners

Primary: Hecker, Stuart N.
Assistant: Gossage, Glenn

Attorney, Agent or Firm

Goldman; Richard M., Siskind; Marvin S., Massaroni; Kenneth M.

International Classes

G11C 013/00
G11B 003/70
G01D 015/10

Abstract

Disclosed is an optical data storage device having a reversible, phase change data storage medium formed of (Sb2 Te3)1-x (Sb2 Se3)x, where x is from 0.18 to 0.43.