Negative plate used for manufacture of a shadow mask, and method for manufacturing the negative plate

摘要

A printing negative plate for printing aperture patterns on the surface of a mask substrate used to manufacture a shadow mask comprises a larger-opening negative plate (20b) having a large number of larger-opening patterns (21b) corresponding to the larger openings (34) and pasted on one side of the mask substrate (10); and a smaller-opening negative plate (20a) corresponding to the smaller openings (35) and pasted on the other side of the mask substrate (10). Each of the larger and smaller patterns (21b, 21a) have a rectangular main pattern (24a, 24b) and rectangular projecting patterns (25) individually projecting outward from the four corners of the main pattern. <IMAGE>