Stock material or miscellaneous articles – Circular sheet or circular blank
Patent
1998-05-07
2000-03-28
Evans, Elizabeth
Stock material or miscellaneous articles
Circular sheet or circular blank
428644, 428457, 428913, 43027011, 430495, 430945, 369283, 369288, B32B 300
Patent
active
060429194
ABSTRACT:
An improved optical data storage medium and a method of forming and utilizing such a medium. One such optical data storage medium has a substrate having an upper surface including a series of physical deformations which encode data. A reflective film stack carried by the upper surface of the substrate includes both a reflective layer and an overlayer. The reflective layer is formed of a reflective metal and is able to generate a readable data stream from a reflected data reading light. The overlayer is formed of a material which has a higher Young's modulus and/or a higher modulus of compression than the reflective metal and is less reflective of the reading light than is the reflective metal at the same thickness. A protective layer is carried behind the reflective film stack and may serve to protect the reflective film stack against physical damage and environmental attack.
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Evans Elizabeth
Zomax Optical Media, Inc.
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