To produce highly demanding assembly groups for the medicinal technology and electronics Cellwar installed a cleanroom according to ISO class 5. In the up-to-date, fully air-conditioned and with overpressure ventilated room we are able to produce optically perfect display bonding (optical bonding). Regarding this very sensitive bonding it is important to work under absolutely particle and dust-free conditions. A filter system cleans the air and directs it by way of special HEPA air purifiers in the cleanroom. The material and the employees reach the room by way of separate locks.