Mitsui Chemicals, Inc.

Yamamoto Chemicals, Inc.

Shunsuke Murayama

Tsutami Misawa

Akira Ogiso

Tadashi Koike

Taizo Nishimoto

Hisashi Tsukahara

Shinobu Inoue

Norihiko Mihara

Ryousuke Nara

An optical recording medium having a recording layer which contains at least one compound selected from the group consisting of mono-, di-, and triazaporphyrin compounds optionally in the form of a metal complex; or an optical recording medium comprising a substrate and formed thereon at least a recording layer containing an organic dye as a main component, characterized in that the organic dye has a first maximum value of absorption at a wavelength &#x3bb;of 400 nm or less in the absorption spectrum and has a second maximum value of absorption at a longer-wavelength side than the &#x3bb;, and a wavelength band wherein the refractive index (n) and the absorption coefficient (k) of the above organic dye satisfy n&#x2267;1.90 and 0.03&#x2266;k&#x2266;0.30.

Optical recording medium and novel azaporphyrin compounds

Growing community of inventors

Sodegaura, Japan

Shunsuke Murayama