High-speed analog chipmaker Inphi Corp. said Monday it is suing server and storage systems maker Netlist Inc. for patent infringement.
The news sent Netlist shares tumbling in aftermarket trading.
Inphi, of Westlake Village, Calif., said Netlist's DDR3 memory modules infringe on two Inphi patents. It said the U.S. patents relate to memory interface technologies used in business server and storage applications. The suit was filed in the U.S. District Court for the Central District of California.
Irvine, Calif.-based Netlist said it had not yet reviewed the lawsuit. The company filed a patent lawsuit against Inphi in September, saying Inphi's iMB isolation memory buffer integrated circuits infringed on a patent held by Netlist.
Netlist stock dropped $1.54, or 26.7 percent, to $4.22 in aftermarket trading. During the day, shares fell 8 percent to close at $5.76.