Patent ID: 6491831
Filing Date: 2002-12-10
Classification: H01J

Abstract:
A method of fabricating a shadow mask to be used for a cathode ray tube, comprising the steps of:(a) forming a first photoresist pattern on a first surface of a shadow mask for forming a first recess at said first surface; (b) forming a second photoresist pattern on a second surface of said shadow mask for forming a second recess at said second surface in such a manner that said second recess cooperates with said first recess to thereby form a through-hole throughout a thickness of said shadow mask, said second recess having a smaller size than that of said first recess, and said second recess having a central axis located closer to a center to said shadow mask than a central axis of said first recess by a predetermined distance, the through-hole having a first wall farther from the center of the shadow mask than a second wall thereof, the first wall having a first portion defined by an inner surface of the first recess and a second portion defined by an inner surface of the second recess, the second portion of the first wall being formed with an angle that reflects electron beams entering the through-hole onto an inner surface of the second wall in the first recess to reduce electron beams that are reflected from the second wall in a direction different from a direction of entry into the second recess; (c) etching said shadow mask with said first and second photoresist patterns acting as a mask; and (d) removing said first and second photoresist patterns.