Shadow mask

A shadow mask that comprises a mask body in which a large number of slots are made in the horizontal and vertical directions, and that allows electron beams to form roughly rectangular beam spots on a fluorescent screen of a cathode ray tube,

• each one of the slots made in the mask body having a roughly rectangular backside opening on the side on which electron beams are incident, a roughly rectangular front-side opening on the side from which electron beams emerge, and a through-hole that connects the backside opening and the front-side opening with each other,
• the mask body having a center point situated in the center of the mask body plane, a horizontal axis passing through the center of the mask body, horizontally extending along the mask body plane, a vertical axis passing through the center of the mask body, vertically extending along the mask body plane, and two diagonal axes passing through the center of the mask body, diagonally extending along the mask body plane,
• a horizontal bridge part extending in the horizontal direction being provided between the front-side openings of each two slots, of the multiple slots made in the mask body, that are arranged adjacently to each other in the vertical direction, and
• between each slot, of the multiple slots made in the mask body, that is situated at least on either of the diagonal axes of the mask body but in such a position that the angle at which electron beams enter the slot is 20 degrees or more and another slot that is arranged adjacently to the above slot in the vertical direction, a connecting part connecting the peripheral-side vertical outer edges of the front-side openings of these slots being provided so that it runs through the horizontal bridge part formed between the front-side openings of the slots,
• the connecting part being formed along and inward, to the center side, from the vertical line connecting the peripheral-side vertical outer edges of the front-side openings of the slots to be connected by the connecting part so that the relationship 0<D1<T is fulfilled, where T (μm) is the distance between the peripheral-side vertical outer edges of the front side openings and the peripheral-side vertical outer edges of the through-holes of the slots to be connected by the connecting part, and D1 (μm) is the horizontal width of the connecting part.