Mattson Technology, Inc. v. Applied Materials, Inc.
Annotate this Case
Lai, an engineer, had access to Applied’s trade secrets and participated in highly confidential meetings. Mattson, Applied's direct competitor, recruited 17 Applied employees. Lai accepted a job with Mattson. Before his last day at Applied, Lai accessed proprietary information from Applied’s cloud-based storage system and sent e-mails attaching highly confidential Applied documents—many clearly marked as such—to his personal email accounts. He signed a separation certificate stating he had not retained any Applied information and confirmed this in two exit interviews. After starting his new job, Lai logged into his personal email accounts on his Mattson computer. Lai claims never disclosed any Applied information to Mattson. Mattson denies any knowledge of Lai’s actions.
Applied sued Mattson and Lai, citing the Uniform Trade Secrets Act (Civ. Code 3426) and breach of Lai’s employment agreement. Lai then deleted the emails he had sent to one account, and, after communicating with Mattson’s lawyers, downloaded a confidential Applied document to his Mattson laptop, deleting it a moment later. Mattson put Lai on leave. cut off his access to his personal email accounts. and sequestered his iPhone and computers. The defendants moved to compel arbitration based on a provision in the Applied-Lai employment contract. The court of appeal affirmed a preliminary injunction prohibiting the defendants from accessing or using Applied’s confidential information and an order compelling arbitration as to Lai. Mattson, a non-party, is not entitled to arbitration. The litigation should be stayed pending arbitration.
Some case metadata and case summaries were written with the help of AI, which can produce inaccuracies. You should read the full case before relying on it for legal research purposes.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.