Rambus and Samsung are suing each other over alleged patent infringements covering computer memory chips.
Rambus has been involved in a number of legal cases against memory chip companies in recent years concerning its patents. It recently settled a case with Infineon over alleged infringements, with Infineon agreeing to pay royalties.
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Samsung is a big customer of Rambus, accounting for around 10% of its revenues. While Samsung already pays royalties to Rambus for older types of memory chip technology, the two have fallen out over the use of newer technologies.
While Rambus accuses Samsung of infringing patents, Samsung is trying to get those patents thrown out in a US court as a result of being “invalid and unenforceable”.
Rambus’ lawsuit was filed weeks before a five-year sales agreement between the two companies was due to expire.