Abstract: An improved microvalve is described. The microvalve is formed such that the walls of the microvalve are formed from a gel material. Typically, the microvalve includes open flow paths, often holes, through a gel layer. An electric field is applied in regions where fluid flow is undesirable. The electric field compresses the gel closing the flow path thereby preventing further fluid flow.

Abstract: A structure and method of using a reusable master printing plate is described. In one embodiment, the method uses an electric field to control a series of microvalves. The microvalves control a fluid flow that raises or lowers selected regions on a flexible printing surface to create a desired relief pattern. After creating the relief pattern, the pattern is fixed and used for printing. After completion of printing, the relief pattern is removed from the master printing plate and the printing plate may be reused by applying a new pattern.