Patent ID: 7390422
Filing Date: 2008-06-24
Classification: G02F,G03F

Abstract:
1. A method for manufacturing a printing plate comprising: forming a hard mask having an opening over an insulating substrate; forming a first trench having a first depth in the insulating substrate using the hard mask; coating a first photoresist over surfaces of the insulating substrate and the hard mask; patterning the first photoresist such that a portion of the first photoresist remains at sidewalls of the first trench; forming a second trench having a second depth in the insulating substrate using the hard mask, wherein the second depth is deeper than the first depth; coating a second photoresist over surfaces of the insulating substrate and the hard mask; patterning the second photoresist such that a portion of the second photoresist remains at sidewalls of the second trench; forming a third trench having a third depth in the insulating substrate using the hard mask, wherein the third depth is deeper than the second depth; and removing the hard mask.