Abstract:
A low-cost information recording medium is provided by which good recording quality can be obtained even when information is recorded thereon in a high density using a blue laser. The recording medium has a recording layer which comprises Sb, O and M. A content of O atoms is 30 atom % or more but not more than 55 atom %, a content of M atoms is 5 atom % or more but not more than 35 atom %, and a content of Sb atoms is 20 atom % or more but not more than 55 atom %. The recording layer does not contain Au, Pt and Pd.
Abstract:
An optical information recording medium (100) of the present invention includes an information layer (011) that allows information to be recorded thereon and reproduced therefrom by irradiation with a laser beam (040). The information layer (011) includes a reflective layer (002), a first dielectric layer (003), a recording layer (005) capable of undergoing a phase change by the irradiation with the laser beam (040) and a second dielectric layer (007) formed in this order from a side opposite to a laser beam incident side. The recording layer (005) contains Ge, Sb and Te. When Ge, Sb and Te contained in the recording layer (005) are represented by GexSbyTez in atomic number ratio, x, y, and z satisfy 0.39@x@0.48, 0.02@y
Abstract:
PROBLEM TO BE SOLVED: To provide a holographic data recording medium.SOLUTION: A holographic data recording medium (1) comprises a polymer film which is adjusted as a recording layer (2). A surface structure of the polymer film can be changed locally by heating. The polymer film (2) is adjusted so as to record holographic information via a local surface structure (6) of the polymer film (2). A reflective layer can be provided on the data recording medium. The polymer film (2) is pulled, preferably pulled in two axial directions. The polymer film (2) preferably comprises one material which is selected from a group consisting of polypropylene, polyethylene terephthalate, polymethyl pentene, polyvinyl chloride and polyimide.
Abstract:
PROBLEM TO BE SOLVED: To provide phase change memory materials, devices and methods.SOLUTION: A new class of phase change materials has been discovered based on compounds of Ga, lanthanide, and chalcogenide. This includes compounds of Ga, La, and S (GLS) as well as related compounds in which there is substitution of S with O, Se and/or Te. Moreover, La can be substituted with other lanthanide series elements. It has been demonstrated that this class of materials exhibit low energy switching. For example, the GLS material can provide an optical recording medium with erasability 3-5 dB greater than the erasability of GeSbTe (GST) material which is the standard material for phase change memories.
Abstract:
The optical recording medium of the invention comprises a recording layer and at least one mixed dielectric layer. The mixed dielectric layer contains cerium oxide and an additive compound. The additive compound is at least one compound selected from among aluminum oxide, chromium oxide, iron oxide, manganese oxide, niobium oxide, magnesium oxide, zinc oxide, titanium oxide, yttrium oxide, tantalum oxide, antimony oxide, zirconium oxide, bismuth oxide and magnesium fluoride. The optical recording medium has a high storage reliability and satisfactory recording/reading characteristics.