Rambus, the memory chip designer, on Wednesday broadened its existing antitrust lawsuit against Dram (Dynamic Random Access Memory) makers, adding Samsung, the biggest maker of such semiconductors, to its list of targets.
Hynix Semiconductor and Micron Technologies have already been accused by Rambus of antitrust violations. The company is arguing that the defendants had been trying to exclude it from the memory market.
Last week, Rambus filed patent infringement cases against Samsung and the South Korean company responded by counter-filing to seek an invalidation of four Rambus patents.
The legal action follows a failure to agree terms of a new licensing contract between Samsung and Rambus, with an existing one due to expire at the end of this month.