Birch, Stewart, Kolasch & Birch, LLP
Optical information recording medium
 An optical information recording medium having a recording layer comprising a dye layer containing a trimethine-based cyanine dye having nitro group attached to a benzene ring or to a naphthalene ring, both being bonded to indole ring, is capable of minimizing the second peak in relative to the main peak shown in FIG. 1, thus enabling the spectrum consisting of a main peak and a second peak to become sharp. The recording layer is capable of performing the recording and reading with a laser beam having a wavelength falling within a range of 620 nm to 690 nm. 
Taiyo Yuden Co., Ltd.
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Toru Yuji Toshiaki Emiko
Fujii Tomizawa Tajima Hamada