Patent ID: 7098583
Filing Date: 2006-08-29
Classification: H01J

Abstract:
1. A slot tension-type shadow mask for a cathode-ray tube (CRT) having a screen, comprising a slot comprising a pseudo-bridge, wherein the pseudo-bridge separates first and second openings of the slot, the openings being arranged in the direction of the tension being applied (which is referred to as the Y-axis direction) such that the first opening is positioned closer to the center of the CRT screen than the second opening, wherein the pseudo-bridge consists of a pair of protuberances that are separated by a lacuna between the two protuberances to connect the first and second openings of the slot, wherein the protuberances extend in the direction substantially perpendicular to the Y-axis direction (which is referred to as the X-axis direction), wherein each protuberance extending in the X-axis direction touches the CRT screen and having at least three portions: wherein the first, second, and third etched portions of each protuberance are shaped in the Z-axis direction (which is substantially perpendicular to Y-axis and X-axis directions) to a predetermined depth so as not to touch the CRT screen, and the shape of the protuberance edge formed in the Z-axis direction to a predetermined depth is referred to as a deviation, and wherein the distance of the first etched portion along the Y-axis direction is longer than the distance of the second etched portion along the Y-axis direction.