Advantest Test Solutions has filed a first amended complaint in a U.S. patent infringement lawsuit against AEM (SGX:AWX), after a California court dismissed the original complaint.
The amended complaint continues to allege infringement of two U.S. patents, according to a Tuesday Singapore Exchange filing.
AEM said the patents relate to a specific wafer-level test system that it does not practice and that it strongly denies the allegations. It said it is reviewing the amended complaint with its U.S. counsel and will defend its position.
AEM said the filing is not expected to have a material impact on its business operations or financial position.