LIVERMORE, CA — October 5, 2005 — FormFactor, Inc. (Nasdaq: FORM) today announced a decision by the Korean Intellectual Property Office confirming the validity of all claims of FormFactor’s Korea Patent No. 312872, which relates to spring contact structures and methods of fabricating those structures, thus dismissing a patent validity challenge brought by Micronics Japan Co., Ltd. (MJC).

“This latest ruling from the Korean Intellectual Property Office again demonstrates the strength and breadth of our global patent portfolio and our proprietary technology,” said Igor Khandros, chief executive officer of FormFactor. “FormFactor has attained its leadership position in the growing wafer test market through a commitment to innovation and a sizeable R&D investment. As a result, we have generated key intellectual property in wafer test technologies, including micro-electro mechanical systems (MEMS)-based wafer probe cards, such as our Korean Patent No. 312872. FormFactor is committed to aggressively pursuing companies that misappropriate these valuable intellectual property rights.”

In addition to successfully defending this patent against MJC’s challenge, FormFactor is currently asserting patent infringement claims against Phicom Corporation, a Korean corporation, in federal court in Oregon and in Seoul Southern District Court in Seoul Korea. The Phicom litigations involve different patents from FormFactor’s global patent portfolio, which numbers more than 650 issued patents and pending applications. This latest Korean Intellectual Property Office decision follows earlier decisions upholding four other FormFactor Korean patents and also orders Micronics Japan to bear the costs of its unsuccessful invalidation action.