Patent Number: 6,251,561

Title: Optical information recording medium and manufacturing method thereof

Abstract: A recording film is formed by a vacuum film formation process. The recording film contains a substance which is thermally decomposed when a recording laser beam is irradiated thereto. When the substance is thermally decomposed by irradiation of the recording laser beam, a substance generated by the thermal decomposition is precipitated within the recording film, and therefore a change in complex index of refraction is caused predominantly over the raising deformation in the recording film. As a result, information is recorded in the recording film while causing almost no raising deformation of the recording film.

Inventors: Kawai; Shoichi (Kuwana, JP), Kuno; Hironari (Kariya, JP), Sano; Naoki (Obu, JP), Sugawara; Ryoichi (Nagoya, JP)

Assignee: Denso Corporation

International Classification: G11B 7/243 (20060101); G11B 7/24 (20060101); G11B 7/26 (20060101); G11B 7/00 (20060101); G11B 007/24 (); G11B 007/26 ()

Expiration Date: 06/26/2018