An aluminum alloy fin stock material comprising about 0. The contact pads are formed as vias. One specific ejector includes a hollow rotor of a downhole motor, and a specific flow coupler includes a cross-channel diverter that directs lubricant from the hollow interior of the rotor to a bearing pack and that directs drilling fluid, used to drive the motor and create pressure that moves a piston in the rotor, from outside the rotor to inside a passageway through the bearing pack. Either or both of said external surfaces is attached with a fatty acid or derivative thereof. The invention furthermore relates to a corresponding mask blank. The properties of the multi-film cap layer are selected so as to prevent the dielectric layer from being exposedremoved during removal of the deposition film.