A vacuum support includes a vacuum plate having a top surface and a bottom surface, the vacuum plate having a mechanical stop extending from the bottom surface; an elastomeric seal extending along a periphery of the bottom surface, the vacuum plate and the elastomeric seal defining a vacuum space; and a vacuum source in communication with the vacuum space. Other embodiments of the invention provide a process for making and using the powder, and articles coated articles obtained thereby. When the first edge of the circuit board is inserted into a slot of a connector socket, contact surfaces of the first and second retention bosses contact top surfaces of the connector socket to help immobilize the circuit board with respect to the connector socket. A collector layer or drain layer is selectively formed on the other surface of the base layer of first conductivity or selectively formed on the one surface thereof.