Patent ID: 7687226

Claim:
A fabricating method of a printing plate, comprising: forming a first conductive layer on an upper surface of a printing plate; forming a second conductive layer on a lower surface of the printing plate; forming a first photo-resist layer on the first conductive layer; forming a second photo-resist layer on the second conductive layer; forming a first photo-resist pattern by etching a portion of the first photo-resist layer to form an opening in the first photo-resist layer exposing a first portion of the first conductive layer; etching the first portion of the first conductive layer using the first photo-resist pattern as a mask so as to form a metal pattern exposing a portion of the printing plate; forming a first contact hole in the first photo-resist pattern exposing a second portion of the metal pattern and forming a second contact hole in the second photo-resist layer exposing the second conductive layer to supply power to the metal pattern and the second conductive layer through the first and second contact holes; submerging the printing plate having the second conductive layer, the metal pattern, the first photo-resist pattern and the second photo-resist layer into an electrolytic solution; applying an electrical field between the metal pattern and the second conductive layer so that the electrolytic solution is dissociated to act to etch the printing plate in a vertical direction commensurate with the electric field so as to form an anisotropically etched pattern in the printing plate in which a width of the pattern is less than a depth of the pattern; and removing the metal pattern, the first photo-resist pattern, the second conductive layer and the second photo-resist layer.