LIVERMORE, CA — April 20, 2005 — FormFactor, Inc. (Nasdaq: FORM) today announced the Korean Intellectual Property Office has dismissed the validity challenge brought by Phicom Corporation against a fourth issued FormFactor patent. The decision from the Korean Intellectual Property Office confirms the validity of all the claims of FormFactor’s Korea Patent No. 252457, and follows on earlier dismissals of Phicom’s validity challenges against FormFactor’s Korea Patent Nos. 278342, 399210 and 324064.

“With this latest ruling, we now have decisions from the Korean Intellectual Property Office upholding all four of the patents we are asserting against Phicom in the district court in Seoul,” said Igor Khandros, chief executive officer of FormFactor. “This is an important milestone – one we believe further validates the strength of our proprietary technology and supports our ongoing efforts to enforce our intellectual property rights.”

The validity challenges were brought by Phicom after FormFactor filed complaints in the Seoul (South Korea) Southern District Court alleging Phicom’s infringement of four different FormFactor Korean patents. The Seoul Southern District Court is expected to conduct substantive hearings on FormFactor’s infringement claims in the next several months. The Korean actions are part of FormFactor’s global IP protection strategy, and the latest ruling follows FormFactor’s recent filing of a lawsuit in federal district court in Oregon charging Phicom with willful infringement of four US patents that cover key aspects of FormFactor’s wafer probe cards.