By Amie Shak

Schaumburg-based Motorola Inc. named four former software engineers employed at its Libertyville and Schaumburg offices in a lawsuit filed Tuesday alleging the theft of $600 million in trade secrets with plans to take them to China, officials said.

Hanjuan Jin, 37, of Schaumburg was indicted by a federal grand jury in April on three counts of theft of trade secrets and is facing charges of computer fraud and abuse, misappropriation of trade secrets and breach of fiduciary duty in the lawsuit.

Federal authorities said U.S. customs agents seized sensitive proprietary information from Jin as she attempted to board a flight to China on Feb. 28, 2007, at O'Hare International Airport. That included more than 1,000 documents, both electronic and paper, belonging to Motorola. Authorities said they also found $30,000 in her luggage.

The release of the classified engineering information on three computer networking products would have cost Motorola $600 million over the next three years, officials said.