METHOD FOR PRODUCING A COMPOSITE SHADOW MASK

摘要

A mesh electrode is coated with an electrically insulating material. The portions of the insulating material are removed where the beam apertures of a shadow mask are to be located when the coated mesh electrode and the shadow mask are combined together. And after finishing the partial removal of the insulating material, the mesh electrode is combined with the shadow mask to produce a composite shadow mask having a converging action upon the electron beam.