ApplicationNo. 081933 filed on 05/21/1998
US Classes:428/64.1, CIRCULAR SHEET OR CIRCULAR BLANK369/283, Layered (e.g., permanent protective layer)369/288, Specified material428/64.4, Optical recording medium or carrier428/64.5, Tellurium containing428/913, MATERIAL DESIGNED TO BE RESPONSIVE TO TEMPERATURE, LIGHT, MOISTURE, ETC.430/270.13, Which changes phase during recording430/495.1, RADIATION SENSITIVE PRODUCT430/945LASER BEAM
ExaminersPrimary: Evans, Elizabeth
Attorney, Agent or Firm
Foreign Patent References
International ClassB32B 003/00
Foreign Application Priority Data1997-05-22 JP
AbstractThe present invention provides an optical recording medium which incorporates an inorganic based recording layer which has a high reflectance, sufficient for reproduction compatibility on devices such as CD-ROM drives, as well as a high degree of modulation between the state prior to recording and that after recording, as well as an information recording method therefor. Accordingly, an optical recording medium comprises a substrate (2) which is substantially transparent with respect to a recording light beam and a reproduction light beam, a first recording layer (3) which is layered on top of the substrate (2) and which incorporates as the main constituent a metal which has a low melting point and a high reflectance, and a second recording layer (4) which is layered on top of the first recording layer (3) and which will, due to heat generated from irradiation of a light beam through the substrate (2), either mix, or alternatively react, with the first recording layer (3) to form an alloy of low reflectance as well as forming irregularities or pitting in the surface, thereby enabling the recording of information. Due to the heat generated from irradiation of a recording light beam through the substrate (2) the first recording layer (3) and the second recording layer (4) are either mixed, or alternatively reacted to form an alloy as well as forming irregularities or pitting in the surface, thereby recording information.
Field of SearchCIRCULAR SHEET OR CIRCULAR BLANK
Recording medium or carrier
Optical recording medium or carrier
MATERIAL DESIGNED TO BE RESPONSIVE TO TEMPERATURE, LIGHT, MOISTURE, ETC.
Which changes phase during recording
RADIATION SENSITIVE PRODUCT
Layered (e.g., permanent protective layer)