Figure 9 shows the fabrication process of ribs by the photo paste method. Photo sensitive rib paste film is coated on
the substrate where address electrodes are formed. After the paste is exposed, it is developed and rib paste in unexposed
areas is removed. The advantage of photo paste method is that it is very simple since only exposure and development are
done. However, because UV light is scattered by glass powder, exposing all of the film at one time is difficult.