Optical recording medium

An optical recording medium, comprising:

• a base substrate having at least one surface which is irradiated by a laser light for recording and retrieving information to and from said optical recording medium;
• an information indicating unit formed on said at least one surface of said base substrate;
• a light transmissive layer formed adjacent said information indicating unit, said light transmissive layer having a thickness of from 3 to 177 .mu.m, and wherein said light transmissive layer is formed with a surface to provide a pencil hardness of the disc of at least H;
• wherein said light transmissive layer includes two layers, a first of which forms said surface of said light transmissive layer and a second of which is provided adjacent said at least one surface of said base substrate;
• and
• wherein said first layer is formed of an inorganic material.

An optical recording medium, comprising:

• a base substrate having at least one surface which is irradiated by a laser light for recording and retrieving information to and from said optical recording medium;
• an information indicating unit formed on said at least one surface of said base substrate;
• a light transmissive layer formed adjacent said information indicating unit, said light transmissive layer having a thickness of from 3 to 177 .mu.m, and wherein said light transmissive layer is formed with a surface to provide a pencil hardness of the disc of at least H;
• wherein said light transmissive layer includes two layers, a first of which forms said surface of said light transmissive layer and a second of which is provided adjacent said at least one surface of said base substrate;
• and
• wherein said first layer is formed by sputtering and has a thickness of from between 1 and 200 nm.

An optical recording medium, comprising:

• a base substrate having at least one surface which is irradiated by a laser light for recording and retrieving information to and from said optical recording medium;
• an information indicating unit formed on said at least one surface of said base substrate;
• a light transmissive layer formed adjacent said information indicating unit, said light transmissive layer having a thickness of from 3 to 177 .mu.m, and wherein said light transmissive layer is formed with a surface to provide a pencil hardness of the disc of at least H;
• wherein said light transmissive layer includes two layers, a first of which forms said surface of said light transmissive layer and a second of which is provided adjacent said at least one surface of said base substrate;
• and
• wherein said first layer has a conductivity sufficient to reduce static charge retained thereon.