Information recording medium, method for manufacturing the same, and recording/reproducing apparatus

A recording and reproduction apparatus for an information recording medium, which comprises a spindle motor for rotating the information recording medium comprising a recording layer, an optical head provided with a semiconductor laser emitting laser beam and an objective lens focusing the laser beam on the recording layer,

• wherein the recording layer comprises a Te—O-MA-MB material consisting of Te, O, MA, wherein MA is at least one element selected from Au and Pd, and MB, wherein MB is at least one element selected from Ag, Cu and Ni, in which a content of Te atom is from 10 atom % to 50 atom %, a content of O atom is from 40 atom % to 70 atom %, a content of MA atom is from 3 atom % to 15 atom %, and a content of MB atom is from 3 atom % to 15atom % in the Te—O-MA-MB material, and
• a ratio of the content of MB atom to a total of the content of MA atom (XA) and the content of MB atom (XB)(XB/(XA+XB)) is from 0.25 to 0.75 in the Te—O-MA-MB material.

An information recording medium comprising a substrate and an information layer having a recording layer, on and from which information is recorded and reproduced by irradiation of laser beam, wherein:

• the recording layer comprises a Te—O-MA-MB material consisting of Te, O, MA, wherein MA is at least one element selected from Au and Pd, and MB, wherein MB is Cu, and
• a content of Te atom is from 10 atom % to 50 atom %, a content of O atom is from 40 atom % to 70 atom %, a content of MA atom is from 3 atom % to 15 atom %, and a content of MB atom is from 5 atom % to 15 atom % in the Te—O-MA-MB material.

A recording and reproduction apparatus for an information recording medium, which comprises a spindle motor for rotating the information recording medium comprising a recording layer, an optical head provided with a semiconductor laser emitting laser beam and an objective lens focusing the laser beam on the recording layer,

• wherein the recording layer comprises a Te—O-MA-MB material consisting of Te, O, MA, wherein MA is at least one element selected from Au and Pd, and MB, wherein MB is Cu, in which a content of Te atom is from 10 atom % to 50 atom %, a content of O atom is from 40 atom % to 70 atom %, a content of MA atom is from 3 atom % to 15 atom %, and a content of MB atom is from 5 atom % to 15 atom % in the Te—O-MA-MB material.

An information recording medium comprising a substrate and an information layer having a recording layer, on and from which information is recorded and reproduced by irradiation of laser beam, wherein:

• the recording layer comprises a Te—O-MA-MB material consisting of Te, O, MA, wherein MA is at least one element selected from Au and Pd, and MB, wherein MB is Ni, and
• a content of Te atom is from 10 atom % to 50 atom %, a content of O atom is from 40 atom % to 70 atom %, a content of MA atom is from 3 atom % to 15 atom %, and a content of MB atom is from 3 atom % to 15 atom % in the Te—O-MA-MB material.

A recording and reproduction apparatus for an information recording medium, which comprises a spindle motor for rotating the information recording medium comprising a recording layer, an optical head provided with a semiconductor laser emitting laser beam and an objective lens focusing the laser beam on the recording layer,

• wherein the recording layer comprises a Te—O-MA-MB material consisting of Te, O, MA, wherein MA is at least one element selected from Au and Pd, and MB, wherein MB is Ni, in which a content of Te atom is from 10 atom % to 50 atom %, a content of O atom is from 40 atom % to 70 atom %, a content of MA atom is from 3 atom % to 15 atom %, and a content of MB atom is from 3 atom % to 15 atom % in the Te—O-MA-MB material.