Method of making a tensioned focus mask

The present invention provides a method of making a tensioned focus mask (30), which includes a set of parallel strands (44) and a set of parallel wires (46) that are perpendicular to the strands and separated from the strands by insulator means. The method includes attaching the strands to a mask frame (50) and then coating the strands with a first insulator (55). The first insulator is then cured, and a second insulator (57) is applied to the first insulator. Next, wires are wound over and in contact with the second insulator, by rotating the mask frame and by drawing a continuous wire (84) from a source (86) through a tensioner (92), while guiding the continuous wire into desired positions overlying the strands. Finally, the second insulator is heated until the wires attach to the second insulator.