Image display unit, and method of manufacturing the same

A method of manufacturing an image display unit by aligning a front-side substrate to a dry plate having a number of pattern holes, when forming a fluorescent plane on a front-side substrate opposed to a back-side substrate on which a number of electron emission elements are arranged, comprising:

• (a) forming three translucent alignment marks in a marking area at least two locations of the dry plate;
• (b) forming a light-shielding alignment mark as a part of a front-side substrate corresponding 1:1 to an alignment mark of the dry plate, in a marking area at least two locations of an ineffective part of the front-side substrate where a fluorescent pattern is not formed;
• (c) observing a state of overlapping of alignment marks of the substrate and the dry plate from the front side of the dry plate for each marking area, in a state that the dry plate and the front-side substrate are arranged parallel, and the front-side substrate is lit from a backside;
• and
• (d) aligning relatively the front-side substrate to the dry plate, so that a state of overlapping of alignment marks of the substrate and the dry plate within a visual field of a photographing means is balanced in at least two marking areas.