Taiyo Yuden Assigned Patent

Taiyo Yuden Co., Ltd., Tokyo, JP, has been assigned a patent (9,135,941) developed by Somei, Hidenori, Tsuzuki, Takeo, Kodaira, Takuo, and Yokoyama, Daizo, Takasaki, Japan, for a “dye for optical information recording medium and optical information recording medium.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Provided is an optical information recording medium employing an In-Groove recording system, and having a preferable recording characteristic with a high modulation degree and low jitter characteristics. The medium is comprised of a circular-disk shaped substrate 2 having a through hole at a center portion thereof and a helical guide groove 3 on one surface thereof, a reflective layer 4 formed on the guide groove 3 of the substrate 2, a recording layer 5 formed on the reflective layer 4 and composed of an organic material including a dye, a protection layer 6 provided on the recording layer 5, and a light-transmissive layer 7 formed on the protection layer 6. The recording layer 5 includes an organic dye which is an azo metal complex compound having a structure represented by, Chemical formula (1) and a functional group represented by, Chemical formula (2).“

The patent application was filed on December 14, 2009 (13/139,194).