Stencil manufacture

Abstract

A method of forming a screen-printing stencil comprising electroforming the stencil using a bi-polar electrical signal. The bi-polar signal comprises a cathodic pulse (22) and an anodic pulse (24). When the cathodic pulse (22) is applied during the electroforming process, metal is deposited. When the anodic pulse (24) is applied, metal is removed. The cathodic pulse (22) has a longer duration than the anodic pulse (24). The ratio of the magnitude of the anodic pulse (24) to the magnitude of the cathodic pulse (22) is greater than one.

Dependencies are inferred from the claim text.