Starting from its dual industrial and technological base, in 1999, Altis Semiconductor sought to strengthen its final other by instituting an active partnership policy with other companies selling into the same final market. It set up on its own site a campus for international groups working in complementary fields, such as Toppan Photomasks, Air Liquide and BOC Edwards. The campus now hosts some fifteen companies, and, renamed Essonne Nanopole, has become a key cluster or expertise in the field of semiconductors.