An optical memory device comprising a compound film formed of two materials adjacent to each other; one material being such that its threshold voltage of current controlled differential negative resistance decreases with the light applied, and the other being an amorphous chalcogenide system. This amorphous chalcogenide system includes a substance selected from the group consisting of chalcogenide systems As-Te-Ge, Te-Ge-Sb-S, Te-Ge-S-As, Te-Ge-S-P, Te-Ge-Sb, Te-Ge-Sb-As, Se-Te-Ge, and S-Se-Te, ...

A thin film is formed on a substrate, which film is made of a substantially amorphous chalcogenide having a composition of As.sub.x .multidot.Te.sub.y .multidot.Se.sub.z .multidot.G.sub.g, where G represents at least an element selected from a group consisting of S, In, Tl, Sn, Pb and Ge, and where 10 at %.ltoreq.x.ltoreq.25 at %, 50 at %.ltoreq.y.ltoreq.88 at %, 0 at %.ltoreq.z.ltoreq.40 at % and 0 at %.ltoreq.g.ltoreq.10 at %, and that x+y+z+g=100 and z+g.noteq.0. A laser beam is projected ont...

A sheet used as a spacer layer is made of photo-curing organic material and thermoplastic organic material, a stamper is pressed on the sheet, and light irradiating is performed after the stamper is stripped.

The present invention relates to an information-recording medium for recording and reproducing information by using light and a method for recording information for the purpose of high-speed and high-density recording. The medium has a structural unit having a conductive polymer layer and an electrolyte layer sandwiched by a pair of electrode layers, each of which contains a thermally decomposable or crosslinkable compound. The medium described above allows high-speed rotation of the medium as i...

The magnetic recording medium provided is produced by forming a substrate having a nanoparticle layer comprising an array of nanoparticles, and an organic compound between said array of nanoparticles; irradiating the nanoparticle layer with an infrared beam to magnetize the nanoparticles; applying a magnetic field to the nanoparticle layer to orient easy axis of magnetization of the magnetic nanoparticles in a substantially uniform direction; and irradiating the nanoparticle layer with an ultrav...

An information recording medium includes an insulating member, first and second electrodes formed in one plane of the insulating member, and a conductive layer having an electrochromic material providing continuity with the first and second electrodes. A gap between the first and second electrodes is insulated.

An information recording medium has a thin-film recording layer and a reflective layer that reflects a laser beam. The recording layer can be composed of an inorganic substance whose optical constant changes when exposed to a laser beam due to the change of its atomic arrangement. The recording layer can also be of an organic substance that deforms when exposed to a laser beam. The medium reflectivity, with respect to the reproduction laser beam exposure from the substrate side, is at least 65 p...

A recording film 3 of phase change type of Sb--Te--Ge system or Sb--Te--In system has at least one of lanthanoid elements and elements selected from among Ag, Ba, Co, Cr, Ni, Pt, Si, Sr, Au, Cd, Cu, Li, Mo, Mn, Zn, Al, Fe, Pb, Na, Cs, Ga, Pd, Bi, Sn, Ti, and V added thereto. A high melting point component 3b is precipitated in the recording film 3 to coexist with a phase change component 3a, thereby preventing the recording film 3 from flowing and segregating during recording and erasing. The re...

An information memory apparatus includes an information storage medium having a thin film formed as a recording layer or a superresolution reading mask layer on a substrate directly or via a foundation layer to record and/or reproduce information stored in the form of an atom configuration change caused by irradiation of an energy beam. The information storage medium includes reflective layers as well. The information memory apparatus further includes a laser used for at least recording. The las...

A wavelength-multiple optical memory is provided which is capable of performing high density recording/reading at room temperature. A large number of cylindrical recording members, each of which is made up of plural portions along a central axis of the cylinder and plural sizes which vary slightly in a direction perpendicular to the central axis, are formed on a substrate. The cylindrical recording members may be of circular cylindrical or elliptical cylindrical shape. It is preferable that reco...