Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1996-02-08
1997-10-28
Evans, Elizabeth
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428642, 428644, 428645, 428646, 428913, 43027012, 43027013, 4304951, 430945, 369283, 369288, B32B 300
Patent
active
056816324
ABSTRACT:
On a substrate, a recording layer which reversibly transforms between two states with different optical properties--a crystalline phase and an amorphous phase--by the irradiation of a laser beam, a first and a second dielectric layer on the bottom and the top surfaces of the recording layer, and a third dielectric layer on one surface of the first or the second dielectric layers and on the opposite side with respect to the recording layer are successively laminated, thus preparing an optical information recording medium. The third dielectric layer has a smaller coefficient of thermal expansion than the first and the second dielectric layers, so that the thermal deformation of the first and the second dielectric layers is reduced and the mass transfer of the recording layer is controlled. As a result, the overwrite cycle characteristics of the optical information recording medium are excellent.
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Akiyama Tetsuya
Kawahara Katsumi
Kitaura Hideki
Nagata Ken'ichi
Ohta Takeo
Evans Elizabeth
Matsushita Electric - Industrial Co., Ltd.
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