Shadow mask has fracture portion formed along periphery line of shadow mask during removal of shadow mask from external frame and dented after removal of shadow mask from external frame

摘要

Shadow mask (2) is held by an external frame (3) along the periphery line (4) formed by etching process in the connection section (5) of the shadow mask. Fracture portion formed along the periphery line of the shadow mask during the removal of shadow mask from the external frame is dented after the removal of shadow mask from the external frame. Independent claims are also included for the following: (a) Shadow mask master roll; (b) Shadow mask manufacturing method