Rambus says FTC has dropped antitrust claims

The company's shares jumped 9 percent in morning trading.

Rambus has fought a series of legal battles over chip patents, which generate most of its revenue. Chip manufacturers forced to pay royalties to Rambus have accused the company of quietly seeking rights to memory chip technology in the 1990s even as it participated in an industry standards-setting body.

Last year Rambus won a crucial jury ruling. In that case, Rambus was cleared of antitrust charges in a lawsuit brought by chip makers Micron Technology Inc., Hynix Semiconductor Inc. and Nanya Technology Corp.

Like the FTC, the companies charged Rambus with deliberately withholding information from the Joint Electron Device Engineering Council (JEDEC), which counted Rambus as a member as it established guidelines for the computer memory industry.

A U.S. District Court Judge affirmed the jury's decision in March, saying Rambus had no clear obligation to disclose pending or future patent applications while it held a spot on the council.

Los Altos, Calif.-based Rambus has consistently denied wrongdoing. The company's general counsel, Thomas Lavelle, said in a statement Thursday, "We are pleased to have finally put this matter behind us."

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