A former Intel engineer has been charged with stealing Intel trade secrets after starting work for rival AMD.
The FBI has alleged that Biswahoman Pani copied confidential documents containing chip design plans for future Intel processors.
The FBI said that 100 pages of sensitive Intel documents and 19 CAD drawings had been found in a search of Pani's house on 1 July.
Pani had handed in his resignation at Intel, saying he was interested in taking a job with a hedge fund and would be on vacation until his 11 June leaving date.
But the FBI said Pani had been discussing a possible job at AMD for several months. He began working for AMD on 2 June, nine days before his employment at Intel officially ended.
Pani still had access to his Intel laptop and the company's computer network. The FBI said Pani used this access to collect sensitive documents that might have provided competitive intelligence for his new employer.
The FBI was called in after an Intel employee learned about Pani's new job with AMD, and ordered a check of the computer system to see if Pani had accessed confidential documents.
Pani had been hired to work at the AMD chip design centre, but is now no longer employed by the company. He is contesting the FBI charges.
There is no evidence that AMD benefited from the documents Pani is alleged to have illegally obtained.