Sun and Unisys are going after South Korean memory chip maker Hynix for damages related to its role in a price-fixing cartel.

The US companies jointly filed a suit Friday in the US District Court in San Francisco claiming compensation for losses incurred in DRAM purchasing.

Following an investigation which began in 2002, Hynix admitted price-fixing to the Department of Justice last year and agreed to pay a $185m fine. Samsung, Infineon and Elpida Memory were also fingered and copped fines in the scandal.

Park said: "The two US firms seem to be taking action to follow up on the ruling."

Hynix is the world's third biggest memory maker. In April it lost a patent case against Rambus and was ordered to pay $306.5m in compensation to its rival. ®

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