The filing, which came in U.S. District Court, charges Infineon Technologies and Micron Technology with illegal use of Tessera-patented designs for chip packages that contain memory and other semiconductor devices.
A Tessera spokesman said the company would provide no further details at this time.
Tessera licenses its package designs to other semiconductor makers.
"We are clearly executing our strategic growth plan, exceeding
previous records for revenue, managing expenses and producing record
profitability," said Tom Lacey, IDW's chairman and chief executive.
IDW guided for second quarter revenue
of $22 million to $23 million.