Acute functional recovery of cerebral blood flow after forebrain ischemia in rat

In a device for coating a substrate 1 made of polymethylmethacrylate with aluminum by means of a direct current source 10 which is connected to an electrode 5 disposed in an evacuable coating chamber 15a and electrically connected to a target 3 to be sputtered and the sputtered particles are deposited on a substrate 1 and wherein a process gas is introduced into the coating chamber (15, 15a), helium has is introduced as a process gas in order to improve adhesiveness and service life 2.