Rambus Inc. has taken a lot of losses in its litigation against semiconductor industry rivals. The latest hit came on Friday, when an International Trade Commission judge called former Rambus execs “dishonest” and “unreliable” witnesses, and added that “not since the long ago era of the Watergate hearings have the words ‘I don’t recall’ been used so regularly in answering questions under oath.”
ITC Judge Theodore Essex released a 380-page opinion on Friday that invalidated five Rambus patents because of prior art. Rambus had asserted the patents against six leading semiconductor manufacturers — LSI Corp., MediaTek Inc., STMicroelectronics, NVidia Corp., Broadcom Corp. and Freescale Semiconductor Inc.— as well as more than 30 of their downstream customers, including Motorola and Hewlett-Packard Co. Essex’s ruling, which elaborates on a March 2 initial determination, also found Rambus’ patents unenforceable on the grounds that its former execs gave “dishonest” testimony about whether they condoned the shredding of documents in anticipation of litigation.
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