The four memory companies named in a new anti-trust lawsuit by Rambus - Hynix, Infineon, Micron and Siemens - have started replying to accusations that they colluded to force up the price of Rambus DDRAM technology and so ruin its commercial potential. Unsurprisingly, none appear to agree with the lawsuit.

Micron in a statement has promised to vigorously defend itself against the lawsuit. It admitted it has yet to see the lawsuit but said it was an attempt by Rambus to divert attention away from the Federal Trade Commission's (FTC) ongoing review into Rambus' behaviour regarding alleged anti-trust violations itself.

Micron spokesman Dave Parker said Rambus failed in the marketplace because of excessive manufacturing costs and minimal RDRAM demand.

Infineon meanwhile promised a robust defense against the new Rambus suit, while Siemens refused to comment on the lawsuit until it had seen it. Hynix, in Seoul, could not be reached for comment.

In the latest of a long series of Rambus lawsuits, the company contends that executives from the accused vendors colluded to keep Rambus' RDRAM product - designed as an alternative to conventional DRAM technology - from becoming a mainstream memory technology by illegally setting cost parameters and restricting output in the hopes of inflating the price of RDRAM products.

This situation is made vastly more complicated by an FTC and EU investigation into such price fixing and whether Rambus, itself, misled its competitors with regard to patents it held on storage technology.