Tuesday said it had agreed to be acquired by Japan's
for about $650 million dollars.
The offer values DuPont at $27 a share, which represents a 50% premium, based on its closing share price of $18.28 Monday. The transaction is expected to close in early 2005, pending shareholder and regulatory approval.
DuPont Photomasks, which was spun off by
in 1996, develops and produces advanced photomasks, as well as electronic design automation software. Photomasks are a key component in the production of semiconductors.
Toppan is one of the largest printing companies in the world.