"In general it is the duty of the company to decide on its strategy and the appropriate future direction. It is not a matter of the Federal Economy Ministry," Andreas Audretsch said during a regular government news conference.

Aixtron is considering reducing the size of the business with a partial sale, its chief executive said in an interview, opening the door for bidders after a takeover deal with a Chinese firm fell apart.

(Reporting by Joseph Nasr and Paul Carrel; Editing by Victoria Bryan)