Sony and Toshiba have been sued in a patent dispute with Wisconsin Alumni Research Foundation (WARF), the University of Wisconsin-Madison's commercial arm.
WARF filed a patent suit in the US District Court for the Western District of Wisconsin on October 20. In its filing, WARF said that the "Emotion Engine" integrated circuit, designed by Toshiba and used in Sony's PlayStation 2 console, infringes U.S. patent 4,630,094.
The patent, issued on December 16, 1986, is titled "Use of metallic glasses for fabrication of structures with submicron dimensions" and covered products including the Emotion Engine and other integrated circuits using copper interconnect technology that were currently being marketed by Toshiba, WARF said.
The technology was first developed by John D. Wiley and John H. Perepezko of the University of Wisconsin-Madison, WARF said.
Sony and Toshiba have 20 days to respond to the filing. Both companies said yesterday that they were unable to comment on the case.