The Chonburi operation was originally established in 1979, and located in Minburi, 20 km north of Bangkok. It was moved to the ANIE site in 1997, following construction of the new facility, which began in November 1996. The installation of new machines was finished in September 1997, and most of the old machines were transferred to the site from Minburi during October and November 1997. The commissioning tests were conducted during August and Cecember 1997, and the Chonburi faccility commenced full operation on December 15, 1997.